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