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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB *//* * Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved. */
#ifndef _RDMA_RESTRACK_H_#define _RDMA_RESTRACK_H_
#include <linux/typecheck.h>#include <linux/sched.h>#include <linux/kref.h>#include <linux/completion.h>#include <linux/sched/task.h>#include <uapi/rdma/rdma_netlink.h>#include <linux/xarray.h>
/* Mark entry as containing driver specific details, it is used to provide QP subtype for now */#define RESTRACK_DD XA_MARK_1
struct ib_device;struct sk_buff;
/** * enum rdma_restrack_type - HW objects to track */enum rdma_restrack_type { /** * @RDMA_RESTRACK_PD: Protection domain (PD) */ RDMA_RESTRACK_PD, /** * @RDMA_RESTRACK_CQ: Completion queue (CQ) */ RDMA_RESTRACK_CQ, /** * @RDMA_RESTRACK_QP: Queue pair (QP) */ RDMA_RESTRACK_QP, /** * @RDMA_RESTRACK_CM_ID: Connection Manager ID (CM_ID) */ RDMA_RESTRACK_CM_ID, /** * @RDMA_RESTRACK_MR: Memory Region (MR) */ RDMA_RESTRACK_MR, /** * @RDMA_RESTRACK_CTX: Verbs contexts (CTX) */ RDMA_RESTRACK_CTX, /** * @RDMA_RESTRACK_COUNTER: Statistic Counter */ RDMA_RESTRACK_COUNTER, /** * @RDMA_RESTRACK_SRQ: Shared receive queue (SRQ) */ RDMA_RESTRACK_SRQ, /** * @RDMA_RESTRACK_DMAH: DMA handle */ RDMA_RESTRACK_DMAH, /** * @RDMA_RESTRACK_MAX: Last entry, used for array dclarations */ RDMA_RESTRACK_MAX};
/** * struct rdma_restrack_entry - metadata per-entry */struct rdma_restrack_entry { /** * @valid: validity indicator * * The entries are filled during rdma_restrack_add, * can be attempted to be free during rdma_restrack_del. * * As an example for that, see mlx5 QPs with type MLX5_IB_QPT_HW_GSI */ bool valid; /** * @no_track: don't add this entry to restrack DB * * This field is used to mark an entry that doesn't need to be added to * internal restrack DB and presented later to the users at the nldev * query stage. */ u8 no_track : 1; /** * @kref: Protect destroy of the resource */ struct kref kref; /** * @comp: Signal that all consumers of resource are completed their work */ struct completion comp; /** * @task: owner of resource tracking entity * * There are two types of entities: created by user and created * by kernel. * * This is relevant for the entities created by users. * For the entities created by kernel, this pointer will be NULL. */ struct task_struct *task; /** * @kern_name: name of owner for the kernel created entities. */ const char *kern_name; /** * @type: various objects in restrack database */ enum rdma_restrack_type type; /** * @user: user resource */ bool user; /** * @id: ID to expose to users */ u32 id;};
int rdma_restrack_count(struct ib_device *dev, enum rdma_restrack_type type, bool show_details);/** * rdma_is_kernel_res() - check the owner of resource * @res: resource entry */static inline bool rdma_is_kernel_res(const struct rdma_restrack_entry *res){ return !res->user;}
/** * rdma_restrack_get() - grab to protect resource from release * @res: resource entry */int __must_check rdma_restrack_get(struct rdma_restrack_entry *res);
/** * rdma_restrack_put() - release resource * @res: resource entry */int rdma_restrack_put(struct rdma_restrack_entry *res);
/* * Helper functions for rdma drivers when filling out * nldev driver attributes. */int rdma_nl_put_driver_u32(struct sk_buff *msg, const char *name, u32 value);int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name, u32 value);int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value);int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name, u64 value);int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name, const char *str);int rdma_nl_stat_hwcounter_entry(struct sk_buff *msg, const char *name, u64 value);
struct rdma_restrack_entry *rdma_restrack_get_byid(struct ib_device *dev, enum rdma_restrack_type type, u32 id);
/** * rdma_restrack_no_track() - don't add resource to the DB * @res: resource entry * * Every user of this API should be cross examined. * Probably you don't need to use this function. */static inline void rdma_restrack_no_track(struct rdma_restrack_entry *res){ res->no_track = true;}static inline bool rdma_restrack_is_tracked(struct rdma_restrack_entry *res){ return !res->no_track;}#endif /* _RDMA_RESTRACK_H_ */