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155 lines
3.9 KiB
155 lines
3.9 KiB
/* 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 region 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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struct percpu_ref ids_inflight_ref; |
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struct completion complete_done; |
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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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