# SPDX-License-Identifier: GPL-2.0
obj-y := leftover.o core.o netlink.o netlink_gen.o dev.o port.o sb.o dpipe.o \
- resource.o param.o region.o health.o trap.o rate.o
+ resource.o param.o region.o health.o trap.o rate.o linecard.o
void devlink_traps_notify_unregister(struct devlink *devlink);
void devlink_rates_notify_register(struct devlink *devlink);
void devlink_rates_notify_unregister(struct devlink *devlink);
+void devlink_linecards_notify_register(struct devlink *devlink);
+void devlink_linecards_notify_unregister(struct devlink *devlink);
/* Ports */
#define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \
struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs);
-/* Linecards */
-struct devlink_linecard {
- struct list_head list;
- struct devlink *devlink;
- unsigned int index;
- const struct devlink_linecard_ops *ops;
- void *priv;
- enum devlink_linecard_state state;
- struct mutex state_lock; /* Protects state */
- const char *type;
- struct devlink_linecard_type *types;
- unsigned int types_count;
- struct devlink *nested_devlink;
-};
-
/* Reload */
bool devlink_reload_actions_valid(const struct devlink_ops *ops);
int devlink_reload(struct devlink *devlink, struct net *dest_net,
int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
struct netlink_ext_ack *extack);
+/* Linecards */
+struct devlink_linecard {
+ struct list_head list;
+ struct devlink *devlink;
+ unsigned int index;
+ const struct devlink_linecard_ops *ops;
+ void *priv;
+ enum devlink_linecard_state state;
+ struct mutex state_lock; /* Protects state */
+ const char *type;
+ struct devlink_linecard_type *types;
+ unsigned int types_count;
+ struct devlink *nested_devlink;
+};
+
/* Devlink nl cmds */
int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_rate_set_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_rate_new_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_rate_del_doit(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
+ struct genl_info *info);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
-static struct devlink_linecard *
-devlink_linecard_get_by_index(struct devlink *devlink,
- unsigned int linecard_index)
-{
- struct devlink_linecard *devlink_linecard;
-
- list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) {
- if (devlink_linecard->index == linecard_index)
- return devlink_linecard;
- }
- return NULL;
-}
-
-static bool devlink_linecard_index_exists(struct devlink *devlink,
- unsigned int linecard_index)
-{
- return devlink_linecard_get_by_index(devlink, linecard_index);
-}
-
-static struct devlink_linecard *
-devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
-{
- if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) {
- u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
- struct devlink_linecard *linecard;
-
- linecard = devlink_linecard_get_by_index(devlink, linecard_index);
- if (!linecard)
- return ERR_PTR(-ENODEV);
- return linecard;
- }
- return ERR_PTR(-EINVAL);
-}
-
-static struct devlink_linecard *
-devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
-{
- return devlink_linecard_get_from_attrs(devlink, info->attrs);
-}
-
-static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct devlink *devlink)
-{
- struct nlattr *nested_attr;
-
- nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
- if (!nested_attr)
- return -EMSGSIZE;
- if (devlink_nl_put_handle(msg, devlink))
- goto nla_put_failure;
-
- nla_nest_end(msg, nested_attr);
- return 0;
-
-nla_put_failure:
- nla_nest_cancel(msg, nested_attr);
- return -EMSGSIZE;
-}
-
-struct devlink_linecard_type {
- const char *type;
- const void *priv;
-};
-
-static int devlink_nl_linecard_fill(struct sk_buff *msg,
- struct devlink *devlink,
- struct devlink_linecard *linecard,
- enum devlink_command cmd, u32 portid,
- u32 seq, int flags,
- struct netlink_ext_ack *extack)
-{
- struct devlink_linecard_type *linecard_type;
- struct nlattr *attr;
- void *hdr;
- int i;
-
- hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
- if (!hdr)
- return -EMSGSIZE;
-
- if (devlink_nl_put_handle(msg, devlink))
- goto nla_put_failure;
- if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, linecard->index))
- goto nla_put_failure;
- if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state))
- goto nla_put_failure;
- if (linecard->type &&
- nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type))
- goto nla_put_failure;
-
- if (linecard->types_count) {
- attr = nla_nest_start(msg,
- DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
- if (!attr)
- goto nla_put_failure;
- for (i = 0; i < linecard->types_count; i++) {
- linecard_type = &linecard->types[i];
- if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
- linecard_type->type)) {
- nla_nest_cancel(msg, attr);
- goto nla_put_failure;
- }
- }
- nla_nest_end(msg, attr);
- }
-
- if (linecard->nested_devlink &&
- devlink_nl_put_nested_handle(msg, linecard->nested_devlink))
- goto nla_put_failure;
-
- genlmsg_end(msg, hdr);
- return 0;
-
-nla_put_failure:
- genlmsg_cancel(msg, hdr);
- return -EMSGSIZE;
-}
-
-static void devlink_linecard_notify(struct devlink_linecard *linecard,
- enum devlink_command cmd)
-{
- struct devlink *devlink = linecard->devlink;
- struct sk_buff *msg;
- int err;
-
- WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW &&
- cmd != DEVLINK_CMD_LINECARD_DEL);
-
- if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
- return;
-
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return;
-
- err = devlink_nl_linecard_fill(msg, devlink, linecard, cmd, 0, 0, 0,
- NULL);
- if (err) {
- nlmsg_free(msg);
- return;
- }
-
- genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
- msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
-}
-
-static void devlink_linecards_notify_register(struct devlink *devlink)
-{
- struct devlink_linecard *linecard;
-
- list_for_each_entry(linecard, &devlink->linecard_list, list)
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
-}
-
-static void devlink_linecards_notify_unregister(struct devlink *devlink)
-{
- struct devlink_linecard *linecard;
-
- list_for_each_entry_reverse(linecard, &devlink->linecard_list, list)
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
-}
-
-int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info)
-{
- struct devlink *devlink = info->user_ptr[0];
- struct devlink_linecard *linecard;
- struct sk_buff *msg;
- int err;
-
- linecard = devlink_linecard_get_from_info(devlink, info);
- if (IS_ERR(linecard))
- return PTR_ERR(linecard);
-
- msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
-
- mutex_lock(&linecard->state_lock);
- err = devlink_nl_linecard_fill(msg, devlink, linecard,
- DEVLINK_CMD_LINECARD_NEW,
- info->snd_portid, info->snd_seq, 0,
- info->extack);
- mutex_unlock(&linecard->state_lock);
- if (err) {
- nlmsg_free(msg);
- return err;
- }
-
- return genlmsg_reply(msg, info);
-}
-
-static int devlink_nl_linecard_get_dump_one(struct sk_buff *msg,
- struct devlink *devlink,
- struct netlink_callback *cb,
- int flags)
-{
- struct devlink_nl_dump_state *state = devlink_dump_state(cb);
- struct devlink_linecard *linecard;
- int idx = 0;
- int err = 0;
-
- list_for_each_entry(linecard, &devlink->linecard_list, list) {
- if (idx < state->idx) {
- idx++;
- continue;
- }
- mutex_lock(&linecard->state_lock);
- err = devlink_nl_linecard_fill(msg, devlink, linecard,
- DEVLINK_CMD_LINECARD_NEW,
- NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, flags,
- cb->extack);
- mutex_unlock(&linecard->state_lock);
- if (err) {
- state->idx = idx;
- break;
- }
- idx++;
- }
-
- return err;
-}
-
-int devlink_nl_linecard_get_dumpit(struct sk_buff *skb,
- struct netlink_callback *cb)
-{
- return devlink_nl_dumpit(skb, cb, devlink_nl_linecard_get_dump_one);
-}
-
-static struct devlink_linecard_type *
-devlink_linecard_type_lookup(struct devlink_linecard *linecard,
- const char *type)
-{
- struct devlink_linecard_type *linecard_type;
- int i;
-
- for (i = 0; i < linecard->types_count; i++) {
- linecard_type = &linecard->types[i];
- if (!strcmp(type, linecard_type->type))
- return linecard_type;
- }
- return NULL;
-}
-
-static int devlink_linecard_type_set(struct devlink_linecard *linecard,
- const char *type,
- struct netlink_ext_ack *extack)
-{
- const struct devlink_linecard_ops *ops = linecard->ops;
- struct devlink_linecard_type *linecard_type;
- int err;
-
- mutex_lock(&linecard->state_lock);
- if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
- NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
- err = -EBUSY;
- goto out;
- }
- if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
- NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
- err = -EBUSY;
- goto out;
- }
-
- linecard_type = devlink_linecard_type_lookup(linecard, type);
- if (!linecard_type) {
- NL_SET_ERR_MSG(extack, "Unsupported line card type provided");
- err = -EINVAL;
- goto out;
- }
-
- if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED &&
- linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
- NL_SET_ERR_MSG(extack, "Line card already provisioned");
- err = -EBUSY;
- /* Check if the line card is provisioned in the same
- * way the user asks. In case it is, make the operation
- * to return success.
- */
- if (ops->same_provision &&
- ops->same_provision(linecard, linecard->priv,
- linecard_type->type,
- linecard_type->priv))
- err = 0;
- goto out;
- }
-
- linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
- linecard->type = linecard_type->type;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
- err = ops->provision(linecard, linecard->priv, linecard_type->type,
- linecard_type->priv, extack);
- if (err) {
- /* Provisioning failed. Assume the linecard is unprovisioned
- * for future operations.
- */
- mutex_lock(&linecard->state_lock);
- linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
- linecard->type = NULL;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
- }
- return err;
-
-out:
- mutex_unlock(&linecard->state_lock);
- return err;
-}
-
-static int devlink_linecard_type_unset(struct devlink_linecard *linecard,
- struct netlink_ext_ack *extack)
-{
- int err;
-
- mutex_lock(&linecard->state_lock);
- if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
- NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
- err = -EBUSY;
- goto out;
- }
- if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
- NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
- err = -EBUSY;
- goto out;
- }
- if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
- linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
- linecard->type = NULL;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- err = 0;
- goto out;
- }
-
- if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
- NL_SET_ERR_MSG(extack, "Line card is not provisioned");
- err = 0;
- goto out;
- }
- linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
- err = linecard->ops->unprovision(linecard, linecard->priv,
- extack);
- if (err) {
- /* Unprovisioning failed. Assume the linecard is unprovisioned
- * for future operations.
- */
- mutex_lock(&linecard->state_lock);
- linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
- linecard->type = NULL;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
- }
- return err;
-
-out:
- mutex_unlock(&linecard->state_lock);
- return err;
-}
-
-static int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
- struct genl_info *info)
-{
- struct netlink_ext_ack *extack = info->extack;
- struct devlink *devlink = info->user_ptr[0];
- struct devlink_linecard *linecard;
- int err;
-
- linecard = devlink_linecard_get_from_info(devlink, info);
- if (IS_ERR(linecard))
- return PTR_ERR(linecard);
-
- if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
- const char *type;
-
- type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
- if (strcmp(type, "")) {
- err = devlink_linecard_type_set(linecard, type, extack);
- if (err)
- return err;
- } else {
- err = devlink_linecard_type_unset(linecard, extack);
- if (err)
- return err;
- }
- }
-
- return 0;
-}
-
const struct genl_small_ops devlink_nl_small_ops[40] = {
{
.cmd = DEVLINK_CMD_PORT_SET,
devlink_linecards_notify_unregister(devlink);
devlink_notify(devlink, DEVLINK_CMD_DEL);
}
-
-static int devlink_linecard_types_init(struct devlink_linecard *linecard)
-{
- struct devlink_linecard_type *linecard_type;
- unsigned int count;
- int i;
-
- count = linecard->ops->types_count(linecard, linecard->priv);
- linecard->types = kmalloc_array(count, sizeof(*linecard_type),
- GFP_KERNEL);
- if (!linecard->types)
- return -ENOMEM;
- linecard->types_count = count;
-
- for (i = 0; i < count; i++) {
- linecard_type = &linecard->types[i];
- linecard->ops->types_get(linecard, linecard->priv, i,
- &linecard_type->type,
- &linecard_type->priv);
- }
- return 0;
-}
-
-static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
-{
- kfree(linecard->types);
-}
-
-/**
- * devl_linecard_create - Create devlink linecard
- *
- * @devlink: devlink
- * @linecard_index: driver-specific numerical identifier of the linecard
- * @ops: linecards ops
- * @priv: user priv pointer
- *
- * Create devlink linecard instance with provided linecard index.
- * Caller can use any indexing, even hw-related one.
- *
- * Return: Line card structure or an ERR_PTR() encoded error code.
- */
-struct devlink_linecard *
-devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
- const struct devlink_linecard_ops *ops, void *priv)
-{
- struct devlink_linecard *linecard;
- int err;
-
- if (WARN_ON(!ops || !ops->provision || !ops->unprovision ||
- !ops->types_count || !ops->types_get))
- return ERR_PTR(-EINVAL);
-
- if (devlink_linecard_index_exists(devlink, linecard_index))
- return ERR_PTR(-EEXIST);
-
- linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
- if (!linecard)
- return ERR_PTR(-ENOMEM);
-
- linecard->devlink = devlink;
- linecard->index = linecard_index;
- linecard->ops = ops;
- linecard->priv = priv;
- linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
- mutex_init(&linecard->state_lock);
-
- err = devlink_linecard_types_init(linecard);
- if (err) {
- mutex_destroy(&linecard->state_lock);
- kfree(linecard);
- return ERR_PTR(err);
- }
-
- list_add_tail(&linecard->list, &devlink->linecard_list);
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- return linecard;
-}
-EXPORT_SYMBOL_GPL(devl_linecard_create);
-
-/**
- * devl_linecard_destroy - Destroy devlink linecard
- *
- * @linecard: devlink linecard
- */
-void devl_linecard_destroy(struct devlink_linecard *linecard)
-{
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
- list_del(&linecard->list);
- devlink_linecard_types_fini(linecard);
- mutex_destroy(&linecard->state_lock);
- kfree(linecard);
-}
-EXPORT_SYMBOL_GPL(devl_linecard_destroy);
-
-/**
- * devlink_linecard_provision_set - Set provisioning on linecard
- *
- * @linecard: devlink linecard
- * @type: linecard type
- *
- * This is either called directly from the provision() op call or
- * as a result of the provision() op call asynchronously.
- */
-void devlink_linecard_provision_set(struct devlink_linecard *linecard,
- const char *type)
-{
- mutex_lock(&linecard->state_lock);
- WARN_ON(linecard->type && strcmp(linecard->type, type));
- linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
- linecard->type = type;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
-}
-EXPORT_SYMBOL_GPL(devlink_linecard_provision_set);
-
-/**
- * devlink_linecard_provision_clear - Clear provisioning on linecard
- *
- * @linecard: devlink linecard
- *
- * This is either called directly from the unprovision() op call or
- * as a result of the unprovision() op call asynchronously.
- */
-void devlink_linecard_provision_clear(struct devlink_linecard *linecard)
-{
- mutex_lock(&linecard->state_lock);
- WARN_ON(linecard->nested_devlink);
- linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
- linecard->type = NULL;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
-}
-EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear);
-
-/**
- * devlink_linecard_provision_fail - Fail provisioning on linecard
- *
- * @linecard: devlink linecard
- *
- * This is either called directly from the provision() op call or
- * as a result of the provision() op call asynchronously.
- */
-void devlink_linecard_provision_fail(struct devlink_linecard *linecard)
-{
- mutex_lock(&linecard->state_lock);
- WARN_ON(linecard->nested_devlink);
- linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
-}
-EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
-
-/**
- * devlink_linecard_activate - Set linecard active
- *
- * @linecard: devlink linecard
- */
-void devlink_linecard_activate(struct devlink_linecard *linecard)
-{
- mutex_lock(&linecard->state_lock);
- WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED);
- linecard->state = DEVLINK_LINECARD_STATE_ACTIVE;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
-}
-EXPORT_SYMBOL_GPL(devlink_linecard_activate);
-
-/**
- * devlink_linecard_deactivate - Set linecard inactive
- *
- * @linecard: devlink linecard
- */
-void devlink_linecard_deactivate(struct devlink_linecard *linecard)
-{
- mutex_lock(&linecard->state_lock);
- switch (linecard->state) {
- case DEVLINK_LINECARD_STATE_ACTIVE:
- linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- break;
- case DEVLINK_LINECARD_STATE_UNPROVISIONING:
- /* Line card is being deactivated as part
- * of unprovisioning flow.
- */
- break;
- default:
- WARN_ON(1);
- break;
- }
- mutex_unlock(&linecard->state_lock);
-}
-EXPORT_SYMBOL_GPL(devlink_linecard_deactivate);
-
-/**
- * devlink_linecard_nested_dl_set - Attach/detach nested devlink
- * instance to linecard.
- *
- * @linecard: devlink linecard
- * @nested_devlink: devlink instance to attach or NULL to detach
- */
-void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard,
- struct devlink *nested_devlink)
-{
- mutex_lock(&linecard->state_lock);
- linecard->nested_devlink = nested_devlink;
- devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
- mutex_unlock(&linecard->state_lock);
-}
-EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
+ */
+
+#include "devl_internal.h"
+
+static struct devlink_linecard *
+devlink_linecard_get_by_index(struct devlink *devlink,
+ unsigned int linecard_index)
+{
+ struct devlink_linecard *devlink_linecard;
+
+ list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) {
+ if (devlink_linecard->index == linecard_index)
+ return devlink_linecard;
+ }
+ return NULL;
+}
+
+static bool devlink_linecard_index_exists(struct devlink *devlink,
+ unsigned int linecard_index)
+{
+ return devlink_linecard_get_by_index(devlink, linecard_index);
+}
+
+static struct devlink_linecard *
+devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
+{
+ if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) {
+ u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
+ struct devlink_linecard *linecard;
+
+ linecard = devlink_linecard_get_by_index(devlink, linecard_index);
+ if (!linecard)
+ return ERR_PTR(-ENODEV);
+ return linecard;
+ }
+ return ERR_PTR(-EINVAL);
+}
+
+static struct devlink_linecard *
+devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
+{
+ return devlink_linecard_get_from_attrs(devlink, info->attrs);
+}
+
+static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct devlink *devlink)
+{
+ struct nlattr *nested_attr;
+
+ nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
+ if (!nested_attr)
+ return -EMSGSIZE;
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, nested_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, nested_attr);
+ return -EMSGSIZE;
+}
+
+struct devlink_linecard_type {
+ const char *type;
+ const void *priv;
+};
+
+static int devlink_nl_linecard_fill(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct devlink_linecard *linecard,
+ enum devlink_command cmd, u32 portid,
+ u32 seq, int flags,
+ struct netlink_ext_ack *extack)
+{
+ struct devlink_linecard_type *linecard_type;
+ struct nlattr *attr;
+ void *hdr;
+ int i;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, linecard->index))
+ goto nla_put_failure;
+ if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state))
+ goto nla_put_failure;
+ if (linecard->type &&
+ nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type))
+ goto nla_put_failure;
+
+ if (linecard->types_count) {
+ attr = nla_nest_start(msg,
+ DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
+ if (!attr)
+ goto nla_put_failure;
+ for (i = 0; i < linecard->types_count; i++) {
+ linecard_type = &linecard->types[i];
+ if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
+ linecard_type->type)) {
+ nla_nest_cancel(msg, attr);
+ goto nla_put_failure;
+ }
+ }
+ nla_nest_end(msg, attr);
+ }
+
+ if (linecard->nested_devlink &&
+ devlink_nl_put_nested_handle(msg, linecard->nested_devlink))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static void devlink_linecard_notify(struct devlink_linecard *linecard,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = linecard->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW &&
+ cmd != DEVLINK_CMD_LINECARD_DEL);
+
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_linecard_fill(msg, devlink, linecard, cmd, 0, 0, 0,
+ NULL);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+ msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+void devlink_linecards_notify_register(struct devlink *devlink)
+{
+ struct devlink_linecard *linecard;
+
+ list_for_each_entry(linecard, &devlink->linecard_list, list)
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+}
+
+void devlink_linecards_notify_unregister(struct devlink *devlink)
+{
+ struct devlink_linecard *linecard;
+
+ list_for_each_entry_reverse(linecard, &devlink->linecard_list, list)
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
+}
+
+int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_linecard *linecard;
+ struct sk_buff *msg;
+ int err;
+
+ linecard = devlink_linecard_get_from_info(devlink, info);
+ if (IS_ERR(linecard))
+ return PTR_ERR(linecard);
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ mutex_lock(&linecard->state_lock);
+ err = devlink_nl_linecard_fill(msg, devlink, linecard,
+ DEVLINK_CMD_LINECARD_NEW,
+ info->snd_portid, info->snd_seq, 0,
+ info->extack);
+ mutex_unlock(&linecard->state_lock);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int devlink_nl_linecard_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb,
+ int flags)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_linecard *linecard;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(linecard, &devlink->linecard_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ mutex_lock(&linecard->state_lock);
+ err = devlink_nl_linecard_fill(msg, devlink, linecard,
+ DEVLINK_CMD_LINECARD_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, flags,
+ cb->extack);
+ mutex_unlock(&linecard->state_lock);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+int devlink_nl_linecard_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ return devlink_nl_dumpit(skb, cb, devlink_nl_linecard_get_dump_one);
+}
+
+static struct devlink_linecard_type *
+devlink_linecard_type_lookup(struct devlink_linecard *linecard,
+ const char *type)
+{
+ struct devlink_linecard_type *linecard_type;
+ int i;
+
+ for (i = 0; i < linecard->types_count; i++) {
+ linecard_type = &linecard->types[i];
+ if (!strcmp(type, linecard_type->type))
+ return linecard_type;
+ }
+ return NULL;
+}
+
+static int devlink_linecard_type_set(struct devlink_linecard *linecard,
+ const char *type,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_linecard_ops *ops = linecard->ops;
+ struct devlink_linecard_type *linecard_type;
+ int err;
+
+ mutex_lock(&linecard->state_lock);
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
+ NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
+ err = -EBUSY;
+ goto out;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+ NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
+ err = -EBUSY;
+ goto out;
+ }
+
+ linecard_type = devlink_linecard_type_lookup(linecard, type);
+ if (!linecard_type) {
+ NL_SET_ERR_MSG(extack, "Unsupported line card type provided");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED &&
+ linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
+ NL_SET_ERR_MSG(extack, "Line card already provisioned");
+ err = -EBUSY;
+ /* Check if the line card is provisioned in the same
+ * way the user asks. In case it is, make the operation
+ * to return success.
+ */
+ if (ops->same_provision &&
+ ops->same_provision(linecard, linecard->priv,
+ linecard_type->type,
+ linecard_type->priv))
+ err = 0;
+ goto out;
+ }
+
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
+ linecard->type = linecard_type->type;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ err = ops->provision(linecard, linecard->priv, linecard_type->type,
+ linecard_type->priv, extack);
+ if (err) {
+ /* Provisioning failed. Assume the linecard is unprovisioned
+ * for future operations.
+ */
+ mutex_lock(&linecard->state_lock);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ }
+ return err;
+
+out:
+ mutex_unlock(&linecard->state_lock);
+ return err;
+}
+
+static int devlink_linecard_type_unset(struct devlink_linecard *linecard,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ mutex_lock(&linecard->state_lock);
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
+ NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
+ err = -EBUSY;
+ goto out;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+ NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
+ err = -EBUSY;
+ goto out;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ err = 0;
+ goto out;
+ }
+
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
+ NL_SET_ERR_MSG(extack, "Line card is not provisioned");
+ err = 0;
+ goto out;
+ }
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ err = linecard->ops->unprovision(linecard, linecard->priv,
+ extack);
+ if (err) {
+ /* Unprovisioning failed. Assume the linecard is unprovisioned
+ * for future operations.
+ */
+ mutex_lock(&linecard->state_lock);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ }
+ return err;
+
+out:
+ mutex_unlock(&linecard->state_lock);
+ return err;
+}
+
+int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_linecard *linecard;
+ int err;
+
+ linecard = devlink_linecard_get_from_info(devlink, info);
+ if (IS_ERR(linecard))
+ return PTR_ERR(linecard);
+
+ if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
+ const char *type;
+
+ type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
+ if (strcmp(type, "")) {
+ err = devlink_linecard_type_set(linecard, type, extack);
+ if (err)
+ return err;
+ } else {
+ err = devlink_linecard_type_unset(linecard, extack);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int devlink_linecard_types_init(struct devlink_linecard *linecard)
+{
+ struct devlink_linecard_type *linecard_type;
+ unsigned int count;
+ int i;
+
+ count = linecard->ops->types_count(linecard, linecard->priv);
+ linecard->types = kmalloc_array(count, sizeof(*linecard_type),
+ GFP_KERNEL);
+ if (!linecard->types)
+ return -ENOMEM;
+ linecard->types_count = count;
+
+ for (i = 0; i < count; i++) {
+ linecard_type = &linecard->types[i];
+ linecard->ops->types_get(linecard, linecard->priv, i,
+ &linecard_type->type,
+ &linecard_type->priv);
+ }
+ return 0;
+}
+
+static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
+{
+ kfree(linecard->types);
+}
+
+/**
+ * devl_linecard_create - Create devlink linecard
+ *
+ * @devlink: devlink
+ * @linecard_index: driver-specific numerical identifier of the linecard
+ * @ops: linecards ops
+ * @priv: user priv pointer
+ *
+ * Create devlink linecard instance with provided linecard index.
+ * Caller can use any indexing, even hw-related one.
+ *
+ * Return: Line card structure or an ERR_PTR() encoded error code.
+ */
+struct devlink_linecard *
+devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
+ const struct devlink_linecard_ops *ops, void *priv)
+{
+ struct devlink_linecard *linecard;
+ int err;
+
+ if (WARN_ON(!ops || !ops->provision || !ops->unprovision ||
+ !ops->types_count || !ops->types_get))
+ return ERR_PTR(-EINVAL);
+
+ if (devlink_linecard_index_exists(devlink, linecard_index))
+ return ERR_PTR(-EEXIST);
+
+ linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
+ if (!linecard)
+ return ERR_PTR(-ENOMEM);
+
+ linecard->devlink = devlink;
+ linecard->index = linecard_index;
+ linecard->ops = ops;
+ linecard->priv = priv;
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ mutex_init(&linecard->state_lock);
+
+ err = devlink_linecard_types_init(linecard);
+ if (err) {
+ mutex_destroy(&linecard->state_lock);
+ kfree(linecard);
+ return ERR_PTR(err);
+ }
+
+ list_add_tail(&linecard->list, &devlink->linecard_list);
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ return linecard;
+}
+EXPORT_SYMBOL_GPL(devl_linecard_create);
+
+/**
+ * devl_linecard_destroy - Destroy devlink linecard
+ *
+ * @linecard: devlink linecard
+ */
+void devl_linecard_destroy(struct devlink_linecard *linecard)
+{
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
+ list_del(&linecard->list);
+ devlink_linecard_types_fini(linecard);
+ mutex_destroy(&linecard->state_lock);
+ kfree(linecard);
+}
+EXPORT_SYMBOL_GPL(devl_linecard_destroy);
+
+/**
+ * devlink_linecard_provision_set - Set provisioning on linecard
+ *
+ * @linecard: devlink linecard
+ * @type: linecard type
+ *
+ * This is either called directly from the provision() op call or
+ * as a result of the provision() op call asynchronously.
+ */
+void devlink_linecard_provision_set(struct devlink_linecard *linecard,
+ const char *type)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->type && strcmp(linecard->type, type));
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+ linecard->type = type;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_set);
+
+/**
+ * devlink_linecard_provision_clear - Clear provisioning on linecard
+ *
+ * @linecard: devlink linecard
+ *
+ * This is either called directly from the unprovision() op call or
+ * as a result of the unprovision() op call asynchronously.
+ */
+void devlink_linecard_provision_clear(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->nested_devlink);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear);
+
+/**
+ * devlink_linecard_provision_fail - Fail provisioning on linecard
+ *
+ * @linecard: devlink linecard
+ *
+ * This is either called directly from the provision() op call or
+ * as a result of the provision() op call asynchronously.
+ */
+void devlink_linecard_provision_fail(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->nested_devlink);
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
+
+/**
+ * devlink_linecard_activate - Set linecard active
+ *
+ * @linecard: devlink linecard
+ */
+void devlink_linecard_activate(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED);
+ linecard->state = DEVLINK_LINECARD_STATE_ACTIVE;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_activate);
+
+/**
+ * devlink_linecard_deactivate - Set linecard inactive
+ *
+ * @linecard: devlink linecard
+ */
+void devlink_linecard_deactivate(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ switch (linecard->state) {
+ case DEVLINK_LINECARD_STATE_ACTIVE:
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ break;
+ case DEVLINK_LINECARD_STATE_UNPROVISIONING:
+ /* Line card is being deactivated as part
+ * of unprovisioning flow.
+ */
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_deactivate);
+
+/**
+ * devlink_linecard_nested_dl_set - Attach/detach nested devlink
+ * instance to linecard.
+ *
+ * @linecard: devlink linecard
+ * @nested_devlink: devlink instance to attach or NULL to detach
+ */
+void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard,
+ struct devlink *nested_devlink)
+{
+ mutex_lock(&linecard->state_lock);
+ linecard->nested_devlink = nested_devlink;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);
projects / linux-2.6-microblaze.git / commitdiff