629 lines
17 KiB
C
629 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
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*/
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#include "devl_internal.h"
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struct devlink_linecard {
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struct list_head list;
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struct devlink *devlink;
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unsigned int index;
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const struct devlink_linecard_ops *ops;
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void *priv;
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enum devlink_linecard_state state;
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struct mutex state_lock; /* Protects state */
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const char *type;
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struct devlink_linecard_type *types;
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unsigned int types_count;
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u32 rel_index;
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};
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unsigned int devlink_linecard_index(struct devlink_linecard *linecard)
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{
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return linecard->index;
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}
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static struct devlink_linecard *
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devlink_linecard_get_by_index(struct devlink *devlink,
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unsigned int linecard_index)
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{
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struct devlink_linecard *devlink_linecard;
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list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) {
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if (devlink_linecard->index == linecard_index)
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return devlink_linecard;
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}
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return NULL;
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}
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static bool devlink_linecard_index_exists(struct devlink *devlink,
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unsigned int linecard_index)
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{
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return devlink_linecard_get_by_index(devlink, linecard_index);
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}
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static struct devlink_linecard *
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devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
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{
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if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) {
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u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
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struct devlink_linecard *linecard;
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linecard = devlink_linecard_get_by_index(devlink, linecard_index);
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if (!linecard)
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return ERR_PTR(-ENODEV);
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return linecard;
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}
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return ERR_PTR(-EINVAL);
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}
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static struct devlink_linecard *
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devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
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{
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return devlink_linecard_get_from_attrs(devlink, info->attrs);
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}
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struct devlink_linecard_type {
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const char *type;
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const void *priv;
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};
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static int devlink_nl_linecard_fill(struct sk_buff *msg,
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struct devlink *devlink,
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struct devlink_linecard *linecard,
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enum devlink_command cmd, u32 portid,
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u32 seq, int flags,
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struct netlink_ext_ack *extack)
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{
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struct devlink_linecard_type *linecard_type;
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struct nlattr *attr;
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void *hdr;
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int i;
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hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
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if (!hdr)
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return -EMSGSIZE;
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if (devlink_nl_put_handle(msg, devlink))
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goto nla_put_failure;
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if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, linecard->index))
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goto nla_put_failure;
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if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state))
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goto nla_put_failure;
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if (linecard->type &&
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nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type))
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goto nla_put_failure;
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if (linecard->types_count) {
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attr = nla_nest_start(msg,
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DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
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if (!attr)
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goto nla_put_failure;
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for (i = 0; i < linecard->types_count; i++) {
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linecard_type = &linecard->types[i];
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if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
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linecard_type->type)) {
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nla_nest_cancel(msg, attr);
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goto nla_put_failure;
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}
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}
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nla_nest_end(msg, attr);
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}
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if (devlink_rel_devlink_handle_put(msg, devlink,
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linecard->rel_index,
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DEVLINK_ATTR_NESTED_DEVLINK,
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NULL))
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goto nla_put_failure;
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genlmsg_end(msg, hdr);
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return 0;
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nla_put_failure:
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genlmsg_cancel(msg, hdr);
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return -EMSGSIZE;
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}
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static void devlink_linecard_notify(struct devlink_linecard *linecard,
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enum devlink_command cmd)
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{
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struct devlink *devlink = linecard->devlink;
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struct sk_buff *msg;
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int err;
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WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW &&
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cmd != DEVLINK_CMD_LINECARD_DEL);
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if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
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return;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return;
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err = devlink_nl_linecard_fill(msg, devlink, linecard, cmd, 0, 0, 0,
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NULL);
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if (err) {
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nlmsg_free(msg);
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return;
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}
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devlink_nl_notify_send(devlink, msg);
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}
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void devlink_linecards_notify_register(struct devlink *devlink)
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{
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struct devlink_linecard *linecard;
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list_for_each_entry(linecard, &devlink->linecard_list, list)
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
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}
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void devlink_linecards_notify_unregister(struct devlink *devlink)
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{
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struct devlink_linecard *linecard;
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list_for_each_entry_reverse(linecard, &devlink->linecard_list, list)
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
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}
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int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info)
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{
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struct devlink *devlink = info->user_ptr[0];
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struct devlink_linecard *linecard;
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struct sk_buff *msg;
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int err;
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linecard = devlink_linecard_get_from_info(devlink, info);
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if (IS_ERR(linecard))
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return PTR_ERR(linecard);
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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mutex_lock(&linecard->state_lock);
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err = devlink_nl_linecard_fill(msg, devlink, linecard,
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DEVLINK_CMD_LINECARD_NEW,
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info->snd_portid, info->snd_seq, 0,
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info->extack);
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mutex_unlock(&linecard->state_lock);
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if (err) {
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nlmsg_free(msg);
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return err;
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}
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return genlmsg_reply(msg, info);
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}
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static int devlink_nl_linecard_get_dump_one(struct sk_buff *msg,
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struct devlink *devlink,
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struct netlink_callback *cb,
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int flags)
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{
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struct devlink_nl_dump_state *state = devlink_dump_state(cb);
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struct devlink_linecard *linecard;
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int idx = 0;
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int err = 0;
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list_for_each_entry(linecard, &devlink->linecard_list, list) {
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if (idx < state->idx) {
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idx++;
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continue;
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}
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mutex_lock(&linecard->state_lock);
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err = devlink_nl_linecard_fill(msg, devlink, linecard,
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DEVLINK_CMD_LINECARD_NEW,
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, flags,
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cb->extack);
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mutex_unlock(&linecard->state_lock);
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if (err) {
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state->idx = idx;
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break;
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}
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idx++;
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}
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return err;
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}
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int devlink_nl_linecard_get_dumpit(struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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return devlink_nl_dumpit(skb, cb, devlink_nl_linecard_get_dump_one);
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}
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static struct devlink_linecard_type *
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devlink_linecard_type_lookup(struct devlink_linecard *linecard,
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const char *type)
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{
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struct devlink_linecard_type *linecard_type;
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int i;
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for (i = 0; i < linecard->types_count; i++) {
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linecard_type = &linecard->types[i];
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if (!strcmp(type, linecard_type->type))
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return linecard_type;
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}
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return NULL;
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}
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static int devlink_linecard_type_set(struct devlink_linecard *linecard,
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const char *type,
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struct netlink_ext_ack *extack)
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{
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const struct devlink_linecard_ops *ops = linecard->ops;
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struct devlink_linecard_type *linecard_type;
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int err;
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mutex_lock(&linecard->state_lock);
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if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
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NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
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err = -EBUSY;
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goto out;
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}
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if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
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NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
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err = -EBUSY;
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goto out;
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}
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linecard_type = devlink_linecard_type_lookup(linecard, type);
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if (!linecard_type) {
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NL_SET_ERR_MSG(extack, "Unsupported line card type provided");
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err = -EINVAL;
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goto out;
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}
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if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED &&
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linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
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NL_SET_ERR_MSG(extack, "Line card already provisioned");
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err = -EBUSY;
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/* Check if the line card is provisioned in the same
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* way the user asks. In case it is, make the operation
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* to return success.
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*/
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if (ops->same_provision &&
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ops->same_provision(linecard, linecard->priv,
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linecard_type->type,
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linecard_type->priv))
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err = 0;
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goto out;
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}
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linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
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linecard->type = linecard_type->type;
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
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mutex_unlock(&linecard->state_lock);
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err = ops->provision(linecard, linecard->priv, linecard_type->type,
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linecard_type->priv, extack);
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if (err) {
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/* Provisioning failed. Assume the linecard is unprovisioned
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* for future operations.
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*/
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mutex_lock(&linecard->state_lock);
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linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
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linecard->type = NULL;
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
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mutex_unlock(&linecard->state_lock);
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}
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return err;
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out:
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mutex_unlock(&linecard->state_lock);
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return err;
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}
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static int devlink_linecard_type_unset(struct devlink_linecard *linecard,
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struct netlink_ext_ack *extack)
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{
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int err;
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mutex_lock(&linecard->state_lock);
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if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
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NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
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err = -EBUSY;
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goto out;
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}
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if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
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NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
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err = -EBUSY;
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goto out;
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}
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if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
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linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
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linecard->type = NULL;
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
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err = 0;
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goto out;
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}
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if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
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NL_SET_ERR_MSG(extack, "Line card is not provisioned");
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err = 0;
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goto out;
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}
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linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
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mutex_unlock(&linecard->state_lock);
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err = linecard->ops->unprovision(linecard, linecard->priv,
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extack);
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if (err) {
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/* Unprovisioning failed. Assume the linecard is unprovisioned
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* for future operations.
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*/
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mutex_lock(&linecard->state_lock);
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linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
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linecard->type = NULL;
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
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mutex_unlock(&linecard->state_lock);
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}
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return err;
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out:
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mutex_unlock(&linecard->state_lock);
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return err;
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}
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int devlink_nl_linecard_set_doit(struct sk_buff *skb, struct genl_info *info)
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{
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struct netlink_ext_ack *extack = info->extack;
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struct devlink *devlink = info->user_ptr[0];
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struct devlink_linecard *linecard;
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int err;
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linecard = devlink_linecard_get_from_info(devlink, info);
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if (IS_ERR(linecard))
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return PTR_ERR(linecard);
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if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
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const char *type;
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type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
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if (strcmp(type, "")) {
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err = devlink_linecard_type_set(linecard, type, extack);
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if (err)
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return err;
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} else {
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err = devlink_linecard_type_unset(linecard, extack);
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if (err)
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return err;
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}
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}
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return 0;
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}
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static int devlink_linecard_types_init(struct devlink_linecard *linecard)
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{
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struct devlink_linecard_type *linecard_type;
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unsigned int count;
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int i;
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count = linecard->ops->types_count(linecard, linecard->priv);
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linecard->types = kmalloc_array(count, sizeof(*linecard_type),
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GFP_KERNEL);
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if (!linecard->types)
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return -ENOMEM;
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linecard->types_count = count;
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for (i = 0; i < count; i++) {
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linecard_type = &linecard->types[i];
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linecard->ops->types_get(linecard, linecard->priv, i,
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&linecard_type->type,
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&linecard_type->priv);
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}
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return 0;
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}
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static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
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{
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kfree(linecard->types);
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}
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|
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/**
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* devl_linecard_create - Create devlink linecard
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*
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* @devlink: devlink
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* @linecard_index: driver-specific numerical identifier of the linecard
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* @ops: linecards ops
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* @priv: user priv pointer
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*
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* Create devlink linecard instance with provided linecard index.
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* Caller can use any indexing, even hw-related one.
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*
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* Return: Line card structure or an ERR_PTR() encoded error code.
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*/
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struct devlink_linecard *
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devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
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const struct devlink_linecard_ops *ops, void *priv)
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{
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struct devlink_linecard *linecard;
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int err;
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|
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if (WARN_ON(!ops || !ops->provision || !ops->unprovision ||
|
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!ops->types_count || !ops->types_get))
|
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return ERR_PTR(-EINVAL);
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|
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if (devlink_linecard_index_exists(devlink, linecard_index))
|
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return ERR_PTR(-EEXIST);
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|
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linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
|
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if (!linecard)
|
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return ERR_PTR(-ENOMEM);
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|
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linecard->devlink = devlink;
|
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linecard->index = linecard_index;
|
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linecard->ops = ops;
|
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linecard->priv = priv;
|
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linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
|
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mutex_init(&linecard->state_lock);
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|
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err = devlink_linecard_types_init(linecard);
|
|
if (err) {
|
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mutex_destroy(&linecard->state_lock);
|
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kfree(linecard);
|
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return ERR_PTR(err);
|
|
}
|
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|
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list_add_tail(&linecard->list, &devlink->linecard_list);
|
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devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
|
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return linecard;
|
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}
|
|
EXPORT_SYMBOL_GPL(devl_linecard_create);
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|
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/**
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|
* devl_linecard_destroy - Destroy devlink linecard
|
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*
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* @linecard: devlink linecard
|
|
*/
|
|
void devl_linecard_destroy(struct devlink_linecard *linecard)
|
|
{
|
|
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
|
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list_del(&linecard->list);
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devlink_linecard_types_fini(linecard);
|
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mutex_destroy(&linecard->state_lock);
|
|
kfree(linecard);
|
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}
|
|
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);
|
|
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);
|
|
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);
|
|
|
|
static void devlink_linecard_rel_notify_cb(struct devlink *devlink,
|
|
u32 linecard_index)
|
|
{
|
|
struct devlink_linecard *linecard;
|
|
|
|
linecard = devlink_linecard_get_by_index(devlink, linecard_index);
|
|
if (!linecard)
|
|
return;
|
|
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
|
|
}
|
|
|
|
static void devlink_linecard_rel_cleanup_cb(struct devlink *devlink,
|
|
u32 linecard_index, u32 rel_index)
|
|
{
|
|
struct devlink_linecard *linecard;
|
|
|
|
linecard = devlink_linecard_get_by_index(devlink, linecard_index);
|
|
if (linecard && linecard->rel_index == rel_index)
|
|
linecard->rel_index = 0;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
int devlink_linecard_nested_dl_set(struct devlink_linecard *linecard,
|
|
struct devlink *nested_devlink)
|
|
{
|
|
return devlink_rel_nested_in_add(&linecard->rel_index,
|
|
linecard->devlink->index,
|
|
linecard->index,
|
|
devlink_linecard_rel_notify_cb,
|
|
devlink_linecard_rel_cleanup_cb,
|
|
nested_devlink);
|
|
}
|
|
EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);
|