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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/infiniband/ulp/iser/iscsi_iser.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/infiniband/ulp/iser/iscsi_iser.h')
-rw-r--r--kernel/drivers/infiniband/ulp/iser/iscsi_iser.h644
1 files changed, 644 insertions, 0 deletions
diff --git a/kernel/drivers/infiniband/ulp/iser/iscsi_iser.h b/kernel/drivers/infiniband/ulp/iser/iscsi_iser.h
new file mode 100644
index 000000000..262ba1f8e
--- /dev/null
+++ b/kernel/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -0,0 +1,644 @@
+/*
+ * iSER transport for the Open iSCSI Initiator & iSER transport internals
+ *
+ * Copyright (C) 2004 Dmitry Yusupov
+ * Copyright (C) 2004 Alex Aizman
+ * Copyright (C) 2005 Mike Christie
+ * based on code maintained by open-iscsi@googlegroups.com
+ *
+ * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
+ * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ISCSI_ISER_H__
+#define __ISCSI_ISER_H__
+
+#include <linux/types.h>
+#include <linux/net.h>
+#include <linux/printk.h>
+#include <scsi/libiscsi.h>
+#include <scsi/scsi_transport_iscsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/mutex.h>
+#include <linux/mempool.h>
+#include <linux/uio.h>
+
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_fmr_pool.h>
+#include <rdma/rdma_cm.h>
+
+#define DRV_NAME "iser"
+#define PFX DRV_NAME ": "
+#define DRV_VER "1.6"
+
+#define iser_dbg(fmt, arg...) \
+ do { \
+ if (unlikely(iser_debug_level > 2)) \
+ printk(KERN_DEBUG PFX "%s: " fmt,\
+ __func__ , ## arg); \
+ } while (0)
+
+#define iser_warn(fmt, arg...) \
+ do { \
+ if (unlikely(iser_debug_level > 0)) \
+ pr_warn(PFX "%s: " fmt, \
+ __func__ , ## arg); \
+ } while (0)
+
+#define iser_info(fmt, arg...) \
+ do { \
+ if (unlikely(iser_debug_level > 1)) \
+ pr_info(PFX "%s: " fmt, \
+ __func__ , ## arg); \
+ } while (0)
+
+#define iser_err(fmt, arg...) \
+ pr_err(PFX "%s: " fmt, __func__ , ## arg)
+
+#define SHIFT_4K 12
+#define SIZE_4K (1ULL << SHIFT_4K)
+#define MASK_4K (~(SIZE_4K-1))
+ /* support up to 512KB in one RDMA */
+#define ISCSI_ISER_SG_TABLESIZE (0x80000 >> SHIFT_4K)
+#define ISER_DEF_XMIT_CMDS_DEFAULT 512
+#if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT
+ #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX
+#else
+ #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT
+#endif
+#define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX
+
+/* QP settings */
+/* Maximal bounds on received asynchronous PDUs */
+#define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */
+
+#define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), *
+ * SCSI_TMFUNC(2), LOGOUT(1) */
+
+#define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX)
+
+#define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2)
+
+/* the max TX (send) WR supported by the iSER QP is defined by *
+ * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect *
+ * to have at max for SCSI command. The tx posting & completion handling code *
+ * supports -EAGAIN scheme where tx is suspended till the QP has room for more *
+ * send WR. D=8 comes from 64K/8K */
+
+#define ISER_INFLIGHT_DATAOUTS 8
+
+#define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \
+ (1 + ISER_INFLIGHT_DATAOUTS) + \
+ ISER_MAX_TX_MISC_PDUS + \
+ ISER_MAX_RX_MISC_PDUS)
+
+/* Max registration work requests per command */
+#define ISER_MAX_REG_WR_PER_CMD 5
+
+/* For Signature we don't support DATAOUTs so no need to make room for them */
+#define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \
+ (1 + ISER_MAX_REG_WR_PER_CMD) + \
+ ISER_MAX_TX_MISC_PDUS + \
+ ISER_MAX_RX_MISC_PDUS)
+
+#define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \
+ - ISER_MAX_TX_MISC_PDUS \
+ - ISER_MAX_RX_MISC_PDUS) / \
+ (1 + ISER_INFLIGHT_DATAOUTS))
+
+#define ISER_WC_BATCH_COUNT 16
+#define ISER_SIGNAL_CMD_COUNT 32
+
+#define ISER_VER 0x10
+#define ISER_WSV 0x08
+#define ISER_RSV 0x04
+
+#define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL
+#define ISER_BEACON_WRID 0xfffffffffffffffeULL
+
+/**
+ * struct iser_hdr - iSER header
+ *
+ * @flags: flags support (zbva, remote_inv)
+ * @rsvd: reserved
+ * @write_stag: write rkey
+ * @write_va: write virtual address
+ * @reaf_stag: read rkey
+ * @read_va: read virtual address
+ */
+struct iser_hdr {
+ u8 flags;
+ u8 rsvd[3];
+ __be32 write_stag;
+ __be64 write_va;
+ __be32 read_stag;
+ __be64 read_va;
+} __attribute__((packed));
+
+
+#define ISER_ZBVA_NOT_SUPPORTED 0x80
+#define ISER_SEND_W_INV_NOT_SUPPORTED 0x40
+
+struct iser_cm_hdr {
+ u8 flags;
+ u8 rsvd[3];
+} __packed;
+
+/* Constant PDU lengths calculations */
+#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
+
+#define ISER_RECV_DATA_SEG_LEN 128
+#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
+#define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN)
+
+/* Length of an object name string */
+#define ISER_OBJECT_NAME_SIZE 64
+
+enum iser_conn_state {
+ ISER_CONN_INIT, /* descriptor allocd, no conn */
+ ISER_CONN_PENDING, /* in the process of being established */
+ ISER_CONN_UP, /* up and running */
+ ISER_CONN_TERMINATING, /* in the process of being terminated */
+ ISER_CONN_DOWN, /* shut down */
+ ISER_CONN_STATES_NUM
+};
+
+enum iser_task_status {
+ ISER_TASK_STATUS_INIT = 0,
+ ISER_TASK_STATUS_STARTED,
+ ISER_TASK_STATUS_COMPLETED
+};
+
+enum iser_data_dir {
+ ISER_DIR_IN = 0, /* to initiator */
+ ISER_DIR_OUT, /* from initiator */
+ ISER_DIRS_NUM
+};
+
+/**
+ * struct iser_data_buf - iSER data buffer
+ *
+ * @sg: pointer to the sg list
+ * @size: num entries of this sg
+ * @data_len: total beffer byte len
+ * @dma_nents: returned by dma_map_sg
+ * @orig_sg: pointer to the original sg list (in case
+ * we used a copy)
+ * @orig_size: num entris of orig sg list
+ */
+struct iser_data_buf {
+ struct scatterlist *sg;
+ unsigned int size;
+ unsigned long data_len;
+ unsigned int dma_nents;
+ struct scatterlist *orig_sg;
+ unsigned int orig_size;
+ };
+
+/* fwd declarations */
+struct iser_device;
+struct iscsi_iser_task;
+struct iscsi_endpoint;
+
+/**
+ * struct iser_mem_reg - iSER memory registration info
+ *
+ * @sge: memory region sg element
+ * @rkey: memory region remote key
+ * @mem_h: pointer to registration context (FMR/Fastreg)
+ */
+struct iser_mem_reg {
+ struct ib_sge sge;
+ u32 rkey;
+ void *mem_h;
+};
+
+enum iser_desc_type {
+ ISCSI_TX_CONTROL ,
+ ISCSI_TX_SCSI_COMMAND,
+ ISCSI_TX_DATAOUT
+};
+
+/**
+ * struct iser_tx_desc - iSER TX descriptor (for send wr_id)
+ *
+ * @iser_header: iser header
+ * @iscsi_header: iscsi header
+ * @type: command/control/dataout
+ * @dam_addr: header buffer dma_address
+ * @tx_sg: sg[0] points to iser/iscsi headers
+ * sg[1] optionally points to either of immediate data
+ * unsolicited data-out or control
+ * @num_sge: number sges used on this TX task
+ */
+struct iser_tx_desc {
+ struct iser_hdr iser_header;
+ struct iscsi_hdr iscsi_header;
+ enum iser_desc_type type;
+ u64 dma_addr;
+ struct ib_sge tx_sg[2];
+ int num_sge;
+};
+
+#define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \
+ sizeof(u64) + sizeof(struct ib_sge)))
+/**
+ * struct iser_rx_desc - iSER RX descriptor (for recv wr_id)
+ *
+ * @iser_header: iser header
+ * @iscsi_header: iscsi header
+ * @data: received data segment
+ * @dma_addr: receive buffer dma address
+ * @rx_sg: ib_sge of receive buffer
+ * @pad: for sense data TODO: Modify to maximum sense length supported
+ */
+struct iser_rx_desc {
+ struct iser_hdr iser_header;
+ struct iscsi_hdr iscsi_header;
+ char data[ISER_RECV_DATA_SEG_LEN];
+ u64 dma_addr;
+ struct ib_sge rx_sg;
+ char pad[ISER_RX_PAD_SIZE];
+} __attribute__((packed));
+
+struct iser_conn;
+struct ib_conn;
+struct iscsi_iser_task;
+
+/**
+ * struct iser_comp - iSER completion context
+ *
+ * @device: pointer to device handle
+ * @cq: completion queue
+ * @wcs: work completion array
+ * @tasklet: Tasklet handle
+ * @active_qps: Number of active QPs attached
+ * to completion context
+ */
+struct iser_comp {
+ struct iser_device *device;
+ struct ib_cq *cq;
+ struct ib_wc wcs[ISER_WC_BATCH_COUNT];
+ struct tasklet_struct tasklet;
+ int active_qps;
+};
+
+/**
+ * struct iser_device - iSER device handle
+ *
+ * @ib_device: RDMA device
+ * @pd: Protection Domain for this device
+ * @dev_attr: Device attributes container
+ * @mr: Global DMA memory region
+ * @event_handler: IB events handle routine
+ * @ig_list: entry in devices list
+ * @refcount: Reference counter, dominated by open iser connections
+ * @comps_used: Number of completion contexts used, Min between online
+ * cpus and device max completion vectors
+ * @comps: Dinamically allocated array of completion handlers
+ * Memory registration pool Function pointers (FMR or Fastreg):
+ * @iser_alloc_rdma_reg_res: Allocation of memory regions pool
+ * @iser_free_rdma_reg_res: Free of memory regions pool
+ * @iser_reg_rdma_mem: Memory registration routine
+ * @iser_unreg_rdma_mem: Memory deregistration routine
+ */
+struct iser_device {
+ struct ib_device *ib_device;
+ struct ib_pd *pd;
+ struct ib_device_attr dev_attr;
+ struct ib_mr *mr;
+ struct ib_event_handler event_handler;
+ struct list_head ig_list;
+ int refcount;
+ int comps_used;
+ struct iser_comp *comps;
+ int (*iser_alloc_rdma_reg_res)(struct ib_conn *ib_conn,
+ unsigned cmds_max);
+ void (*iser_free_rdma_reg_res)(struct ib_conn *ib_conn);
+ int (*iser_reg_rdma_mem)(struct iscsi_iser_task *iser_task,
+ enum iser_data_dir cmd_dir);
+ void (*iser_unreg_rdma_mem)(struct iscsi_iser_task *iser_task,
+ enum iser_data_dir cmd_dir);
+};
+
+#define ISER_CHECK_GUARD 0xc0
+#define ISER_CHECK_REFTAG 0x0f
+#define ISER_CHECK_APPTAG 0x30
+
+enum iser_reg_indicator {
+ ISER_DATA_KEY_VALID = 1 << 0,
+ ISER_PROT_KEY_VALID = 1 << 1,
+ ISER_SIG_KEY_VALID = 1 << 2,
+ ISER_FASTREG_PROTECTED = 1 << 3,
+};
+
+/**
+ * struct iser_pi_context - Protection information context
+ *
+ * @prot_mr: protection memory region
+ * @prot_frpl: protection fastreg page list
+ * @sig_mr: signature feature enabled memory region
+ */
+struct iser_pi_context {
+ struct ib_mr *prot_mr;
+ struct ib_fast_reg_page_list *prot_frpl;
+ struct ib_mr *sig_mr;
+};
+
+/**
+ * struct fast_reg_descriptor - Fast registration descriptor
+ *
+ * @list: entry in connection fastreg pool
+ * @data_mr: data memory region
+ * @data_frpl: data fastreg page list
+ * @pi_ctx: protection information context
+ * @reg_indicators: fast registration indicators
+ */
+struct fast_reg_descriptor {
+ struct list_head list;
+ struct ib_mr *data_mr;
+ struct ib_fast_reg_page_list *data_frpl;
+ struct iser_pi_context *pi_ctx;
+ u8 reg_indicators;
+};
+
+/**
+ * struct ib_conn - Infiniband related objects
+ *
+ * @cma_id: rdma_cm connection maneger handle
+ * @qp: Connection Queue-pair
+ * @post_recv_buf_count: post receive counter
+ * @sig_count: send work request signal count
+ * @rx_wr: receive work request for batch posts
+ * @device: reference to iser device
+ * @comp: iser completion context
+ * @pi_support: Indicate device T10-PI support
+ * @beacon: beacon send wr to signal all flush errors were drained
+ * @flush_comp: completes when all connection completions consumed
+ * @lock: protects fmr/fastreg pool
+ * @union.fmr:
+ * @pool: FMR pool for fast registrations
+ * @page_vec: page vector to hold mapped commands pages
+ * used for registration
+ * @union.fastreg:
+ * @pool: Fast registration descriptors pool for fast
+ * registrations
+ * @pool_size: Size of pool
+ */
+struct ib_conn {
+ struct rdma_cm_id *cma_id;
+ struct ib_qp *qp;
+ int post_recv_buf_count;
+ u8 sig_count;
+ struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
+ struct iser_device *device;
+ struct iser_comp *comp;
+ bool pi_support;
+ struct ib_send_wr beacon;
+ struct completion flush_comp;
+ spinlock_t lock;
+ union {
+ struct {
+ struct ib_fmr_pool *pool;
+ struct iser_page_vec *page_vec;
+ } fmr;
+ struct {
+ struct list_head pool;
+ int pool_size;
+ } fastreg;
+ };
+};
+
+/**
+ * struct iser_conn - iSER connection context
+ *
+ * @ib_conn: connection RDMA resources
+ * @iscsi_conn: link to matching iscsi connection
+ * @ep: transport handle
+ * @state: connection logical state
+ * @qp_max_recv_dtos: maximum number of data outs, corresponds
+ * to max number of post recvs
+ * @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1)
+ * @min_posted_rx: (qp_max_recv_dtos >> 2)
+ * @max_cmds: maximum cmds allowed for this connection
+ * @name: connection peer portal
+ * @release_work: deffered work for release job
+ * @state_mutex: protects iser onnection state
+ * @stop_completion: conn_stop completion
+ * @ib_completion: RDMA cleanup completion
+ * @up_completion: connection establishment completed
+ * (state is ISER_CONN_UP)
+ * @conn_list: entry in ig conn list
+ * @login_buf: login data buffer (stores login parameters)
+ * @login_req_buf: login request buffer
+ * @login_req_dma: login request buffer dma address
+ * @login_resp_buf: login response buffer
+ * @login_resp_dma: login response buffer dma address
+ * @rx_desc_head: head of rx_descs cyclic buffer
+ * @rx_descs: rx buffers array (cyclic buffer)
+ * @num_rx_descs: number of rx descriptors
+ */
+struct iser_conn {
+ struct ib_conn ib_conn;
+ struct iscsi_conn *iscsi_conn;
+ struct iscsi_endpoint *ep;
+ enum iser_conn_state state;
+ unsigned qp_max_recv_dtos;
+ unsigned qp_max_recv_dtos_mask;
+ unsigned min_posted_rx;
+ u16 max_cmds;
+ char name[ISER_OBJECT_NAME_SIZE];
+ struct work_struct release_work;
+ struct mutex state_mutex;
+ struct completion stop_completion;
+ struct completion ib_completion;
+ struct completion up_completion;
+ struct list_head conn_list;
+
+ char *login_buf;
+ char *login_req_buf, *login_resp_buf;
+ u64 login_req_dma, login_resp_dma;
+ unsigned int rx_desc_head;
+ struct iser_rx_desc *rx_descs;
+ u32 num_rx_descs;
+};
+
+/**
+ * struct iscsi_iser_task - iser task context
+ *
+ * @desc: TX descriptor
+ * @iser_conn: link to iser connection
+ * @status: current task status
+ * @sc: link to scsi command
+ * @command_sent: indicate if command was sent
+ * @dir: iser data direction
+ * @rdma_reg: task rdma registration desc
+ * @data: iser data buffer desc
+ * @prot: iser protection buffer desc
+ */
+struct iscsi_iser_task {
+ struct iser_tx_desc desc;
+ struct iser_conn *iser_conn;
+ enum iser_task_status status;
+ struct scsi_cmnd *sc;
+ int command_sent;
+ int dir[ISER_DIRS_NUM];
+ struct iser_mem_reg rdma_reg[ISER_DIRS_NUM];
+ struct iser_data_buf data[ISER_DIRS_NUM];
+ struct iser_data_buf prot[ISER_DIRS_NUM];
+};
+
+struct iser_page_vec {
+ u64 *pages;
+ int length;
+ int offset;
+ int data_size;
+};
+
+/**
+ * struct iser_global: iSER global context
+ *
+ * @device_list_mutex: protects device_list
+ * @device_list: iser devices global list
+ * @connlist_mutex: protects connlist
+ * @connlist: iser connections global list
+ * @desc_cache: kmem cache for tx dataout
+ */
+struct iser_global {
+ struct mutex device_list_mutex;
+ struct list_head device_list;
+ struct mutex connlist_mutex;
+ struct list_head connlist;
+ struct kmem_cache *desc_cache;
+};
+
+extern struct iser_global ig;
+extern int iser_debug_level;
+extern bool iser_pi_enable;
+extern int iser_pi_guard;
+
+int iser_send_control(struct iscsi_conn *conn,
+ struct iscsi_task *task);
+
+int iser_send_command(struct iscsi_conn *conn,
+ struct iscsi_task *task);
+
+int iser_send_data_out(struct iscsi_conn *conn,
+ struct iscsi_task *task,
+ struct iscsi_data *hdr);
+
+void iscsi_iser_recv(struct iscsi_conn *conn,
+ struct iscsi_hdr *hdr,
+ char *rx_data,
+ int rx_data_len);
+
+void iser_conn_init(struct iser_conn *iser_conn);
+
+void iser_conn_release(struct iser_conn *iser_conn);
+
+int iser_conn_terminate(struct iser_conn *iser_conn);
+
+void iser_release_work(struct work_struct *work);
+
+void iser_rcv_completion(struct iser_rx_desc *desc,
+ unsigned long dto_xfer_len,
+ struct ib_conn *ib_conn);
+
+void iser_snd_completion(struct iser_tx_desc *desc,
+ struct ib_conn *ib_conn);
+
+void iser_task_rdma_init(struct iscsi_iser_task *task);
+
+void iser_task_rdma_finalize(struct iscsi_iser_task *task);
+
+void iser_free_rx_descriptors(struct iser_conn *iser_conn);
+
+void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task,
+ struct iser_data_buf *mem,
+ enum iser_data_dir cmd_dir);
+
+int iser_reg_rdma_mem_fmr(struct iscsi_iser_task *task,
+ enum iser_data_dir cmd_dir);
+int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *task,
+ enum iser_data_dir cmd_dir);
+
+int iser_connect(struct iser_conn *iser_conn,
+ struct sockaddr *src_addr,
+ struct sockaddr *dst_addr,
+ int non_blocking);
+
+void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task,
+ enum iser_data_dir cmd_dir);
+void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task,
+ enum iser_data_dir cmd_dir);
+
+int iser_post_recvl(struct iser_conn *iser_conn);
+int iser_post_recvm(struct iser_conn *iser_conn, int count);
+int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc,
+ bool signal);
+
+int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
+ struct iser_data_buf *data,
+ enum iser_data_dir iser_dir,
+ enum dma_data_direction dma_dir);
+
+void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task,
+ struct iser_data_buf *data,
+ enum dma_data_direction dir);
+
+int iser_initialize_task_headers(struct iscsi_task *task,
+ struct iser_tx_desc *tx_desc);
+int iser_alloc_rx_descriptors(struct iser_conn *iser_conn,
+ struct iscsi_session *session);
+int iser_create_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max);
+void iser_free_fmr_pool(struct ib_conn *ib_conn);
+int iser_create_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max);
+void iser_free_fastreg_pool(struct ib_conn *ib_conn);
+u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
+ enum iser_data_dir cmd_dir, sector_t *sector);
+struct fast_reg_descriptor *
+iser_reg_desc_get(struct ib_conn *ib_conn);
+void
+iser_reg_desc_put(struct ib_conn *ib_conn,
+ struct fast_reg_descriptor *desc);
+#endif