[PATCH 08/24] ibtrs: server: private header with server structs and functions

[Roman Pen <roman.penyaev@profitbricks.com>]

This header describes main structs and functions used by ibtrs-server
module, mainly for accepting IBTRS sessions, creating/destroying
sysfs entries, accounting statistics on server side.

Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com>
Signed-off-by: Danil Kipnis <danil.kipnis@profitbricks.com>
Cc: Jack Wang <jinpu.wang@profitbricks.com>
---
 drivers/infiniband/ulp/ibtrs/ibtrs-srv.h | 169 +++++++++++++++++++++++++++++++
 1 file changed, 169 insertions(+)

diff --git a/drivers/infiniband/ulp/ibtrs/ibtrs-srv.h b/drivers/infiniband/ulp/ibtrs/ibtrs-srv.h
new file mode 100644
index 000000000000..f54e159eaf2a
--- /dev/null
+++ b/drivers/infiniband/ulp/ibtrs/ibtrs-srv.h
@@ -0,0 +1,169 @@
+/*
+ * InfiniBand Transport Layer
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler <mail@fholler.de>
+ *          Jack Wang <jinpu.wang@profitbricks.com>
+ *          Kleber Souza <kleber.souza@profitbricks.com>
+ *          Danil Kipnis <danil.kipnis@profitbricks.com>
+ *          Roman Penyaev <roman.penyaev@profitbricks.com>
+ *          Milind Dumbare <Milind.dumbare@gmail.com>
+ *
+ * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved.
+ * Authors: Danil Kipnis <danil.kipnis@profitbricks.com>
+ *          Roman Penyaev <roman.penyaev@profitbricks.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IBTRS_SRV_H
+#define IBTRS_SRV_H
+
+#include <linux/refcount.h>
+#include "ibtrs-pri.h"
+
+/**
+ * enum ibtrs_srv_state - Server states.
+ */
+enum ibtrs_srv_state {
+	IBTRS_SRV_CONNECTING,
+	IBTRS_SRV_CONNECTED,
+	IBTRS_SRV_CLOSING,
+	IBTRS_SRV_CLOSED,
+};
+
+static inline const char *ibtrs_srv_state_str(enum ibtrs_srv_state state)
+{
+	switch (state) {
+	case IBTRS_SRV_CONNECTING:
+		return "IBTRS_SRV_CONNECTING";
+	case IBTRS_SRV_CONNECTED:
+		return "IBTRS_SRV_CONNECTED";
+	case IBTRS_SRV_CLOSING:
+		return "IBTRS_SRV_CLOSING";
+	case IBTRS_SRV_CLOSED:
+		return "IBTRS_SRV_CLOSED";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+struct ibtrs_stats_wc_comp {
+	atomic64_t	calls;
+	atomic64_t	total_wc_cnt;
+};
+
+struct ibtrs_srv_stats_rdma_stats {
+	struct {
+		atomic64_t	cnt;
+		atomic64_t	size_total;
+	} dir[2];
+};
+
+struct ibtrs_srv_stats {
+	struct ibtrs_srv_stats_rdma_stats	rdma_stats;
+	atomic_t				apm_cnt;
+	struct ibtrs_stats_wc_comp		wc_comp;
+};
+
+struct ibtrs_srv_con {
+	struct ibtrs_con	c;
+	atomic_t		wr_cnt;
+};
+
+struct ibtrs_srv_op {
+	struct ibtrs_srv_con		*con;
+	u32				msg_id;
+	u8				dir;
+	u64				data_dma_addr;
+	struct ibtrs_msg_rdma_read	*msg;
+	struct ib_rdma_wr		*tx_wr;
+	struct ib_sge			*tx_sg;
+};
+
+struct ibtrs_srv_sess {
+	struct ibtrs_sess	s;
+	struct ibtrs_srv	*srv;
+	struct work_struct	close_work;
+	enum ibtrs_srv_state	state;
+	spinlock_t		state_lock;
+	int			cur_cq_vector;
+	struct ibtrs_srv_op	**ops_ids;
+	atomic_t		ids_inflight;
+	wait_queue_head_t	ids_waitq;
+	dma_addr_t		*rdma_addr;
+	bool			established;
+	unsigned int		mem_bits;
+	struct kobject		kobj;
+	struct kobject		kobj_stats;
+	struct ibtrs_srv_stats	stats;
+};
+
+struct ibtrs_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 ibtrs_srv_ctx	*ctx;
+	struct list_head	ctx_list;
+	void			*priv;
+	size_t			queue_depth;
+	struct page		**chunks;
+	struct kobject		kobj;
+	struct kobject		kobj_paths;
+};
+
+struct ibtrs_srv_ctx {
+	rdma_ev_fn *rdma_ev;
+	link_ev_fn *link_ev;
+	struct rdma_cm_id *cm_id_ip;
+	struct rdma_cm_id *cm_id_ib;
+	struct mutex srv_mutex;
+	struct list_head srv_list;
+};
+
+/* See ibtrs-log.h */
+#define TYPES_TO_SESSNAME(obj)						\
+	LIST(CASE(obj, struct ibtrs_srv_sess *, s.sessname))
+
+void ibtrs_srv_queue_close(struct ibtrs_srv_sess *sess);
+
+/* ibtrs-srv-stats.c */
+
+void ibtrs_srv_update_rdma_stats(struct ibtrs_srv_stats *s, size_t size, int d);
+void ibtrs_srv_update_wc_stats(struct ibtrs_srv_stats *s);
+
+int ibtrs_srv_reset_rdma_stats(struct ibtrs_srv_stats *stats, bool enable);
+ssize_t ibtrs_srv_stats_rdma_to_str(struct ibtrs_srv_stats *stats,
+				    char *page, size_t len);
+int ibtrs_srv_reset_wc_completion_stats(struct ibtrs_srv_stats *stats,
+					bool enable);
+int ibtrs_srv_stats_wc_completion_to_str(struct ibtrs_srv_stats *stats, char *buf,
+					 size_t len);
+int ibtrs_srv_reset_all_stats(struct ibtrs_srv_stats *stats, bool enable);
+ssize_t ibtrs_srv_reset_all_help(struct ibtrs_srv_stats *stats,
+				 char *page, size_t len);
+
+/* ibtrs-srv-sysfs.c */
+
+int ibtrs_srv_create_sysfs_module_files(void);
+void ibtrs_srv_destroy_sysfs_module_files(void);
+
+int ibtrs_srv_create_sess_files(struct ibtrs_srv_sess *sess);
+void ibtrs_srv_destroy_sess_files(struct ibtrs_srv_sess *sess);
+
+#endif /* IBTRS_SRV_H */
-- 
2.13.1