2018-06-05 12:48:08 +08:00
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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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2018-01-28 17:17:20 +08:00
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/*
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* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved.
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*/
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#ifndef _RDMA_RESTRACK_H_
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#define _RDMA_RESTRACK_H_
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#include <linux/typecheck.h>
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#include <linux/sched.h>
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#include <linux/kref.h>
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#include <linux/completion.h>
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2018-03-02 05:57:44 +08:00
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#include <linux/sched/task.h>
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2018-05-03 23:41:42 +08:00
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#include <uapi/rdma/rdma_netlink.h>
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2019-02-19 04:25:43 +08:00
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#include <linux/xarray.h>
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2018-01-28 17:17:20 +08:00
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2019-07-09 20:44:47 +08:00
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struct ib_device;
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struct sk_buff;
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2018-01-28 17:17:20 +08:00
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/**
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* enum rdma_restrack_type - HW objects to track
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*/
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enum rdma_restrack_type {
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/**
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* @RDMA_RESTRACK_PD: Protection domain (PD)
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*/
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RDMA_RESTRACK_PD,
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/**
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* @RDMA_RESTRACK_CQ: Completion queue (CQ)
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*/
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RDMA_RESTRACK_CQ,
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/**
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* @RDMA_RESTRACK_QP: Queue pair (QP)
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*/
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RDMA_RESTRACK_QP,
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2018-03-02 05:57:44 +08:00
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/**
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* @RDMA_RESTRACK_CM_ID: Connection Manager ID (CM_ID)
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*/
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RDMA_RESTRACK_CM_ID,
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2018-03-02 05:58:13 +08:00
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/**
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* @RDMA_RESTRACK_MR: Memory Region (MR)
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*/
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RDMA_RESTRACK_MR,
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2018-11-28 19:16:43 +08:00
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/**
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* @RDMA_RESTRACK_CTX: Verbs contexts (CTX)
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*/
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RDMA_RESTRACK_CTX,
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2019-07-02 18:02:31 +08:00
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/**
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* @RDMA_RESTRACK_COUNTER: Statistic Counter
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*/
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RDMA_RESTRACK_COUNTER,
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2021-04-18 21:41:24 +08:00
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/**
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* @RDMA_RESTRACK_SRQ: Shared receive queue (SRQ)
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*/
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RDMA_RESTRACK_SRQ,
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2018-01-28 17:17:20 +08:00
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/**
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* @RDMA_RESTRACK_MAX: Last entry, used for array dclarations
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*/
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RDMA_RESTRACK_MAX
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};
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/**
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* struct rdma_restrack_entry - metadata per-entry
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*/
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struct rdma_restrack_entry {
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/**
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* @valid: validity indicator
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*
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* The entries are filled during rdma_restrack_add,
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* can be attempted to be free during rdma_restrack_del.
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*
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* As an example for that, see mlx5 QPs with type MLX5_IB_QPT_HW_GSI
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*/
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bool valid;
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2020-11-17 15:01:47 +08:00
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/**
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* @no_track: don't add this entry to restrack DB
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*
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* This field is used to mark an entry that doesn't need to be added to
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* internal restrack DB and presented later to the users at the nldev
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* query stage.
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*/
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u8 no_track : 1;
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2018-01-28 17:17:20 +08:00
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/*
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* @kref: Protect destroy of the resource
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*/
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struct kref kref;
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/*
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* @comp: Signal that all consumers of resource are completed their work
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*/
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struct completion comp;
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/**
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* @task: owner of resource tracking entity
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*
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* There are two types of entities: created by user and created
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* by kernel.
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*
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* This is relevant for the entities created by users.
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* For the entities created by kernel, this pointer will be NULL.
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*/
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struct task_struct *task;
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/**
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* @kern_name: name of owner for the kernel created entities.
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*/
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const char *kern_name;
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/**
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* @type: various objects in restrack database
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*/
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enum rdma_restrack_type type;
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2018-12-17 23:15:16 +08:00
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/**
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* @user: user resource
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*/
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bool user;
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2019-02-19 04:25:43 +08:00
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/**
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* @id: ID to expose to users
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*/
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u32 id;
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2018-01-28 17:17:20 +08:00
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};
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2019-01-30 18:48:58 +08:00
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int rdma_restrack_count(struct ib_device *dev,
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2019-08-15 16:38:29 +08:00
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enum rdma_restrack_type type);
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2018-01-28 17:17:20 +08:00
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/**
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* rdma_is_kernel_res() - check the owner of resource
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* @res: resource entry
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*/
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2020-09-22 17:11:06 +08:00
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static inline bool rdma_is_kernel_res(const struct rdma_restrack_entry *res)
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2018-01-28 17:17:20 +08:00
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{
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2018-12-17 23:15:16 +08:00
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return !res->user;
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2018-01-28 17:17:20 +08:00
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}
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/**
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* rdma_restrack_get() - grab to protect resource from release
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* @res: resource entry
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*/
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int __must_check rdma_restrack_get(struct rdma_restrack_entry *res);
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/**
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2018-03-21 23:12:42 +08:00
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* rdma_restrack_put() - release resource
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2018-01-28 17:17:20 +08:00
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* @res: resource entry
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*/
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int rdma_restrack_put(struct rdma_restrack_entry *res);
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2018-03-02 05:57:44 +08:00
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2018-05-03 23:41:42 +08:00
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/*
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* Helper functions for rdma drivers when filling out
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* nldev driver attributes.
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*/
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int rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name, u32 value);
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int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name,
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u32 value);
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int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value);
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int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name,
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u64 value);
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2019-10-16 14:23:07 +08:00
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int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name,
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const char *str);
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2019-10-16 14:23:08 +08:00
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int rdma_nl_stat_hwcounter_entry(struct sk_buff *msg, const char *name,
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u64 value);
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2019-10-16 14:23:07 +08:00
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2019-02-19 04:25:44 +08:00
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struct rdma_restrack_entry *rdma_restrack_get_byid(struct ib_device *dev,
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enum rdma_restrack_type type,
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u32 id);
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2020-11-17 15:01:47 +08:00
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/**
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* rdma_restrack_no_track() - don't add resource to the DB
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* @res: resource entry
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*
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2023-02-06 16:57:25 +08:00
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* Every user of this API should be cross examined.
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* Probably you don't need to use this function.
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2020-11-17 15:01:47 +08:00
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*/
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static inline void rdma_restrack_no_track(struct rdma_restrack_entry *res)
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{
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res->no_track = true;
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}
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static inline bool rdma_restrack_is_tracked(struct rdma_restrack_entry *res)
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{
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return !res->no_track;
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}
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2018-01-28 17:17:20 +08:00
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#endif /* _RDMA_RESTRACK_H_ */
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