/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* RDMA Transport Layer
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*
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* Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
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* Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
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* Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
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*/
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#ifndef RTRS_SRV_H
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#define RTRS_SRV_H
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#include <linux/device.h>
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#include <linux/refcount.h>
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#include "rtrs-pri.h"
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/*
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* enum rtrs_srv_state - Server states.
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*/
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enum rtrs_srv_state {
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RTRS_SRV_CONNECTING,
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RTRS_SRV_CONNECTED,
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RTRS_SRV_CLOSING,
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RTRS_SRV_CLOSED,
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};
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/* stats for Read and write operation.
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* see Documentation/ABI/testing/sysfs-class-rtrs-server for details
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*/
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struct rtrs_srv_stats_rdma_stats {
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struct {
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atomic64_t cnt;
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atomic64_t size_total;
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} dir[2];
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};
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struct rtrs_srv_stats {
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struct kobject kobj_stats;
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struct rtrs_srv_stats_rdma_stats rdma_stats;
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struct rtrs_srv_sess *sess;
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};
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struct rtrs_srv_con {
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struct rtrs_con c;
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atomic_t wr_cnt;
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atomic_t sq_wr_avail;
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struct list_head rsp_wr_wait_list;
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spinlock_t rsp_wr_wait_lock;
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};
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/* IO context in rtrs_srv, each io has one */
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struct rtrs_srv_op {
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struct rtrs_srv_con *con;
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u32 msg_id;
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u8 dir;
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struct rtrs_msg_rdma_read *rd_msg;
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struct ib_rdma_wr tx_wr;
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struct ib_sge tx_sg;
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struct list_head wait_list;
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int status;
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};
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/*
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* server side memory region context, when always_invalidate=Y, we need
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* queue_depth of memory regrion to invalidate each memory region.
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*/
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struct rtrs_srv_mr {
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struct ib_mr *mr;
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struct sg_table sgt;
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struct ib_cqe inv_cqe; /* only for always_invalidate=true */
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u32 msg_id; /* only for always_invalidate=true */
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u32 msg_off; /* only for always_invalidate=true */
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struct rtrs_iu *iu; /* send buffer for new rkey msg */
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};
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struct rtrs_srv_sess {
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struct rtrs_sess s;
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struct rtrs_srv *srv;
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struct work_struct close_work;
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enum rtrs_srv_state state;
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spinlock_t state_lock;
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int cur_cq_vector;
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struct rtrs_srv_op **ops_ids;
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atomic_t ids_inflight;
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wait_queue_head_t ids_waitq;
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struct rtrs_srv_mr *mrs;
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unsigned int mrs_num;
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dma_addr_t *dma_addr;
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bool established;
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unsigned int mem_bits;
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struct kobject kobj;
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struct rtrs_srv_stats *stats;
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};
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struct rtrs_srv {
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struct list_head paths_list;
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int paths_up;
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struct mutex paths_ev_mutex;
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size_t paths_num;
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struct mutex paths_mutex;
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uuid_t paths_uuid;
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refcount_t refcount;
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struct rtrs_srv_ctx *ctx;
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struct list_head ctx_list;
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void *priv;
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size_t queue_depth;
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struct page **chunks;
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struct device dev;
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unsigned int dev_ref;
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struct kobject *kobj_paths;
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};
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struct rtrs_srv_ctx {
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struct rtrs_srv_ops ops;
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struct rdma_cm_id *cm_id_ip;
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struct rdma_cm_id *cm_id_ib;
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struct mutex srv_mutex;
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struct list_head srv_list;
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};
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struct rtrs_srv_ib_ctx {
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struct rtrs_srv_ctx *srv_ctx;
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u16 port;
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struct mutex ib_dev_mutex;
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int ib_dev_count;
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};
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extern struct class *rtrs_dev_class;
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void close_sess(struct rtrs_srv_sess *sess);
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static inline void rtrs_srv_update_rdma_stats(struct rtrs_srv_stats *s,
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size_t size, int d)
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{
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atomic64_inc(&s->rdma_stats.dir[d].cnt);
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atomic64_add(size, &s->rdma_stats.dir[d].size_total);
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}
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/* functions which are implemented in rtrs-srv-stats.c */
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int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable);
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ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats,
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char *page, size_t len);
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int rtrs_srv_reset_wc_completion_stats(struct rtrs_srv_stats *stats,
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bool enable);
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int rtrs_srv_stats_wc_completion_to_str(struct rtrs_srv_stats *stats, char *buf,
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size_t len);
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int rtrs_srv_reset_all_stats(struct rtrs_srv_stats *stats, bool enable);
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ssize_t rtrs_srv_reset_all_help(struct rtrs_srv_stats *stats,
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char *page, size_t len);
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/* functions which are implemented in rtrs-srv-sysfs.c */
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int rtrs_srv_create_sess_files(struct rtrs_srv_sess *sess);
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void rtrs_srv_destroy_sess_files(struct rtrs_srv_sess *sess);
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#endif /* RTRS_SRV_H */
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