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![Leon Romanovsky](/assets/img/avatar_default.png)
Driver QP types are special case with no IBTA restrictions. For example,
EFA implemented creation of this QP type as regular one, while mlx5
separated create to two step: create and modify. That separation causes to
the situation where DC QP (mlx5) is always added to the same xarray index
zero.
This change allows to drivers like mlx5 simply disable restrack DB
tracking, but it doesn't disable kref on the memory.
Fixes: 52e0a118a2
("RDMA/restrack: Track driver QP types in resource tracker")
Link: https://lore.kernel.org/r/20201117070148.1974114-3-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
172 lines
4.1 KiB
C
172 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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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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#include <linux/sched/task.h>
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#include <uapi/rdma/rdma_netlink.h>
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#include <linux/xarray.h>
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struct ib_device;
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struct sk_buff;
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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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/**
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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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/**
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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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/**
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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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/**
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* @RDMA_RESTRACK_COUNTER: Statistic Counter
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*/
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RDMA_RESTRACK_COUNTER,
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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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/**
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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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/*
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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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/**
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* @user: user resource
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*/
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bool user;
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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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};
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int rdma_restrack_count(struct ib_device *dev,
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enum rdma_restrack_type type);
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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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static inline bool rdma_is_kernel_res(const struct rdma_restrack_entry *res)
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{
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return !res->user;
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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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* rdma_restrack_put() - release resource
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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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/*
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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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int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name,
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const char *str);
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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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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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/**
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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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* Every user of thie API should be cross examined.
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* Probaby you don't need to use this function.
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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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#endif /* _RDMA_RESTRACK_H_ */
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