717 lines
22 KiB
C
Executable file
717 lines
22 KiB
C
Executable file
/*
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* iSER transport for the Open iSCSI Initiator & iSER transport internals
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*
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* Copyright (C) 2004 Dmitry Yusupov
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* Copyright (C) 2004 Alex Aizman
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* Copyright (C) 2005 Mike Christie
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* based on code maintained by open-iscsi@googlegroups.com
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*
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* Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved.
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* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
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* Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __ISCSI_ISER_H__
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#define __ISCSI_ISER_H__
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#include <linux/types.h>
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#include <linux/net.h>
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#include <linux/printk.h>
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#include <scsi/libiscsi.h>
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#include <scsi/scsi_transport_iscsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/iser.h>
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#include <linux/interrupt.h>
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#include <linux/wait.h>
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#include <linux/sched.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <linux/mutex.h>
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#include <linux/mempool.h>
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#include <linux/uio.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_fmr_pool.h>
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#include <rdma/rdma_cm.h>
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#define DRV_NAME "iser"
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#define PFX DRV_NAME ": "
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#define DRV_VER "1.6"
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#define iser_dbg(fmt, arg...) \
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do { \
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if (unlikely(iser_debug_level > 2)) \
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printk(KERN_DEBUG PFX "%s: " fmt,\
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__func__ , ## arg); \
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} while (0)
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#define iser_warn(fmt, arg...) \
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do { \
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if (unlikely(iser_debug_level > 0)) \
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pr_warn(PFX "%s: " fmt, \
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__func__ , ## arg); \
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} while (0)
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#define iser_info(fmt, arg...) \
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do { \
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if (unlikely(iser_debug_level > 1)) \
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pr_info(PFX "%s: " fmt, \
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__func__ , ## arg); \
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} while (0)
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#define iser_err(fmt, arg...) \
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pr_err(PFX "%s: " fmt, __func__ , ## arg)
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#define SHIFT_4K 12
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#define SIZE_4K (1ULL << SHIFT_4K)
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#define MASK_4K (~(SIZE_4K-1))
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/* Default support is 512KB I/O size */
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#define ISER_DEF_MAX_SECTORS 1024
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#define ISCSI_ISER_DEF_SG_TABLESIZE ((ISER_DEF_MAX_SECTORS * 512) >> SHIFT_4K)
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/* Maximum support is 8MB I/O size */
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#define ISCSI_ISER_MAX_SG_TABLESIZE ((16384 * 512) >> SHIFT_4K)
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#define ISER_DEF_XMIT_CMDS_DEFAULT 512
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#if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT
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#define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX
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#else
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#define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT
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#endif
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#define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX
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/* QP settings */
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/* Maximal bounds on received asynchronous PDUs */
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#define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */
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#define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), *
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* SCSI_TMFUNC(2), LOGOUT(1) */
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#define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX)
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#define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2)
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/* the max TX (send) WR supported by the iSER QP is defined by *
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* max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect *
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* to have at max for SCSI command. The tx posting & completion handling code *
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* supports -EAGAIN scheme where tx is suspended till the QP has room for more *
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* send WR. D=8 comes from 64K/8K */
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#define ISER_INFLIGHT_DATAOUTS 8
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#define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \
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(1 + ISER_INFLIGHT_DATAOUTS) + \
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ISER_MAX_TX_MISC_PDUS + \
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ISER_MAX_RX_MISC_PDUS)
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/* Max registration work requests per command */
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#define ISER_MAX_REG_WR_PER_CMD 5
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/* For Signature we don't support DATAOUTs so no need to make room for them */
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#define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \
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(1 + ISER_MAX_REG_WR_PER_CMD) + \
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ISER_MAX_TX_MISC_PDUS + \
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ISER_MAX_RX_MISC_PDUS)
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#define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \
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- ISER_MAX_TX_MISC_PDUS \
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- ISER_MAX_RX_MISC_PDUS) / \
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(1 + ISER_INFLIGHT_DATAOUTS))
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#define ISER_SIGNAL_CMD_COUNT 32
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/* Constant PDU lengths calculations */
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#define ISER_HEADERS_LEN (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr))
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#define ISER_RECV_DATA_SEG_LEN 128
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#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
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#define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN)
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/* Length of an object name string */
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#define ISER_OBJECT_NAME_SIZE 64
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enum iser_conn_state {
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ISER_CONN_INIT, /* descriptor allocd, no conn */
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ISER_CONN_PENDING, /* in the process of being established */
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ISER_CONN_UP, /* up and running */
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ISER_CONN_TERMINATING, /* in the process of being terminated */
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ISER_CONN_DOWN, /* shut down */
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ISER_CONN_STATES_NUM
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};
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enum iser_task_status {
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ISER_TASK_STATUS_INIT = 0,
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ISER_TASK_STATUS_STARTED,
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ISER_TASK_STATUS_COMPLETED
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};
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enum iser_data_dir {
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ISER_DIR_IN = 0, /* to initiator */
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ISER_DIR_OUT, /* from initiator */
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ISER_DIRS_NUM
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};
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/**
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* struct iser_data_buf - iSER data buffer
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*
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* @sg: pointer to the sg list
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* @size: num entries of this sg
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* @data_len: total beffer byte len
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* @dma_nents: returned by dma_map_sg
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*/
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struct iser_data_buf {
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struct scatterlist *sg;
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int size;
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unsigned long data_len;
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int dma_nents;
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};
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/* fwd declarations */
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struct iser_device;
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struct iscsi_iser_task;
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struct iscsi_endpoint;
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struct iser_reg_resources;
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/**
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* struct iser_mem_reg - iSER memory registration info
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*
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* @sge: memory region sg element
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* @rkey: memory region remote key
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* @mem_h: pointer to registration context (FMR/Fastreg)
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*/
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struct iser_mem_reg {
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struct ib_sge sge;
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u32 rkey;
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void *mem_h;
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};
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enum iser_desc_type {
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ISCSI_TX_CONTROL ,
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ISCSI_TX_SCSI_COMMAND,
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ISCSI_TX_DATAOUT
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};
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/* Maximum number of work requests per task:
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* Data memory region local invalidate + fast registration
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* Protection memory region local invalidate + fast registration
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* Signature memory region local invalidate + fast registration
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* PDU send
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*/
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#define ISER_MAX_WRS 7
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/**
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* struct iser_tx_desc - iSER TX descriptor
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*
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* @iser_header: iser header
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* @iscsi_header: iscsi header
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* @type: command/control/dataout
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* @dam_addr: header buffer dma_address
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* @tx_sg: sg[0] points to iser/iscsi headers
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* sg[1] optionally points to either of immediate data
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* unsolicited data-out or control
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* @num_sge: number sges used on this TX task
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* @mapped: Is the task header mapped
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* @wr_idx: Current WR index
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* @wrs: Array of WRs per task
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* @data_reg: Data buffer registration details
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* @prot_reg: Protection buffer registration details
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* @sig_attrs: Signature attributes
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*/
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struct iser_tx_desc {
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struct iser_ctrl iser_header;
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struct iscsi_hdr iscsi_header;
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enum iser_desc_type type;
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u64 dma_addr;
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struct ib_sge tx_sg[2];
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int num_sge;
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struct ib_cqe cqe;
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bool mapped;
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u8 wr_idx;
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union iser_wr {
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struct ib_send_wr send;
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struct ib_reg_wr fast_reg;
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struct ib_sig_handover_wr sig;
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} wrs[ISER_MAX_WRS];
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struct iser_mem_reg data_reg;
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struct iser_mem_reg prot_reg;
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struct ib_sig_attrs sig_attrs;
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};
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#define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \
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sizeof(u64) + sizeof(struct ib_sge) + \
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sizeof(struct ib_cqe)))
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/**
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* struct iser_rx_desc - iSER RX descriptor
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*
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* @iser_header: iser header
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* @iscsi_header: iscsi header
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* @data: received data segment
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* @dma_addr: receive buffer dma address
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* @rx_sg: ib_sge of receive buffer
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* @pad: for sense data TODO: Modify to maximum sense length supported
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*/
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struct iser_rx_desc {
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struct iser_ctrl iser_header;
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struct iscsi_hdr iscsi_header;
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char data[ISER_RECV_DATA_SEG_LEN];
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u64 dma_addr;
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struct ib_sge rx_sg;
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struct ib_cqe cqe;
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char pad[ISER_RX_PAD_SIZE];
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} __packed;
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/**
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* struct iser_login_desc - iSER login descriptor
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*
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* @req: pointer to login request buffer
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* @resp: pointer to login response buffer
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* @req_dma: DMA address of login request buffer
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* @rsp_dma: DMA address of login response buffer
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* @sge: IB sge for login post recv
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* @cqe: completion handler
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*/
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struct iser_login_desc {
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void *req;
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void *rsp;
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u64 req_dma;
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u64 rsp_dma;
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struct ib_sge sge;
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struct ib_cqe cqe;
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} __attribute__((packed));
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struct iser_conn;
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struct ib_conn;
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struct iscsi_iser_task;
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/**
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* struct iser_comp - iSER completion context
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*
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* @cq: completion queue
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* @active_qps: Number of active QPs attached
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* to completion context
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*/
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struct iser_comp {
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struct ib_cq *cq;
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int active_qps;
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};
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/**
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* struct iser_device - Memory registration operations
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* per-device registration schemes
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*
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* @alloc_reg_res: Allocate registration resources
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* @free_reg_res: Free registration resources
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* @fast_reg_mem: Register memory buffers
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* @unreg_mem: Un-register memory buffers
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* @reg_desc_get: Get a registration descriptor for pool
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* @reg_desc_put: Get a registration descriptor to pool
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*/
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struct iser_reg_ops {
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int (*alloc_reg_res)(struct ib_conn *ib_conn,
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unsigned cmds_max,
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unsigned int size);
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void (*free_reg_res)(struct ib_conn *ib_conn);
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int (*reg_mem)(struct iscsi_iser_task *iser_task,
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struct iser_data_buf *mem,
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struct iser_reg_resources *rsc,
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struct iser_mem_reg *reg);
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void (*unreg_mem)(struct iscsi_iser_task *iser_task,
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enum iser_data_dir cmd_dir);
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struct iser_fr_desc * (*reg_desc_get)(struct ib_conn *ib_conn);
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void (*reg_desc_put)(struct ib_conn *ib_conn,
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struct iser_fr_desc *desc);
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};
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/**
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* struct iser_device - iSER device handle
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*
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* @ib_device: RDMA device
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* @pd: Protection Domain for this device
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* @mr: Global DMA memory region
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* @event_handler: IB events handle routine
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* @ig_list: entry in devices list
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* @refcount: Reference counter, dominated by open iser connections
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* @comps_used: Number of completion contexts used, Min between online
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* cpus and device max completion vectors
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* @comps: Dinamically allocated array of completion handlers
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* @reg_ops: Registration ops
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* @remote_inv_sup: Remote invalidate is supported on this device
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*/
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struct iser_device {
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struct ib_device *ib_device;
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struct ib_pd *pd;
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struct ib_event_handler event_handler;
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struct list_head ig_list;
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int refcount;
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int comps_used;
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struct iser_comp *comps;
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const struct iser_reg_ops *reg_ops;
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bool remote_inv_sup;
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};
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/**
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* struct iser_reg_resources - Fast registration recources
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*
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* @mr: memory region
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* @fmr_pool: pool of fmrs
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* @page_vec: fast reg page list used by fmr pool
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* @mr_valid: is mr valid indicator
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*/
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struct iser_reg_resources {
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union {
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struct ib_mr *mr;
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struct ib_fmr_pool *fmr_pool;
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};
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struct iser_page_vec *page_vec;
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u8 mr_valid:1;
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};
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/**
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* struct iser_pi_context - Protection information context
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*
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* @rsc: protection buffer registration resources
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* @sig_mr: signature enable memory region
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* @sig_mr_valid: is sig_mr valid indicator
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* @sig_protected: is region protected indicator
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*/
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struct iser_pi_context {
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struct iser_reg_resources rsc;
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struct ib_mr *sig_mr;
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u8 sig_mr_valid:1;
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u8 sig_protected:1;
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};
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/**
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* struct iser_fr_desc - Fast registration descriptor
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*
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* @list: entry in connection fastreg pool
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* @rsc: data buffer registration resources
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* @pi_ctx: protection information context
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*/
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struct iser_fr_desc {
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struct list_head list;
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struct iser_reg_resources rsc;
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struct iser_pi_context *pi_ctx;
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struct list_head all_list;
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};
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/**
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* struct iser_fr_pool: connection fast registration pool
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*
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* @list: list of fastreg descriptors
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* @lock: protects fmr/fastreg pool
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* @size: size of the pool
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*/
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struct iser_fr_pool {
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struct list_head list;
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spinlock_t lock;
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int size;
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struct list_head all_list;
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};
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/**
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* struct ib_conn - Infiniband related objects
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*
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* @cma_id: rdma_cm connection maneger handle
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* @qp: Connection Queue-pair
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* @post_recv_buf_count: post receive counter
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* @sig_count: send work request signal count
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* @rx_wr: receive work request for batch posts
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* @device: reference to iser device
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* @comp: iser completion context
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* @fr_pool: connection fast registration poool
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* @pi_support: Indicate device T10-PI support
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*/
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struct ib_conn {
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struct rdma_cm_id *cma_id;
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struct ib_qp *qp;
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int post_recv_buf_count;
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u8 sig_count;
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struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
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struct iser_device *device;
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struct iser_comp *comp;
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struct iser_fr_pool fr_pool;
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bool pi_support;
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struct ib_cqe reg_cqe;
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};
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/**
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* struct iser_conn - iSER connection context
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*
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* @ib_conn: connection RDMA resources
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* @iscsi_conn: link to matching iscsi connection
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* @ep: transport handle
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* @state: connection logical state
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* @qp_max_recv_dtos: maximum number of data outs, corresponds
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* to max number of post recvs
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* @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1)
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* @min_posted_rx: (qp_max_recv_dtos >> 2)
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* @max_cmds: maximum cmds allowed for this connection
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* @name: connection peer portal
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* @release_work: deffered work for release job
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* @state_mutex: protects iser onnection state
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* @stop_completion: conn_stop completion
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* @ib_completion: RDMA cleanup completion
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|
* @up_completion: connection establishment completed
|
|
* (state is ISER_CONN_UP)
|
|
* @conn_list: entry in ig conn list
|
|
* @login_desc: login descriptor
|
|
* @rx_desc_head: head of rx_descs cyclic buffer
|
|
* @rx_descs: rx buffers array (cyclic buffer)
|
|
* @num_rx_descs: number of rx descriptors
|
|
* @scsi_sg_tablesize: scsi host sg_tablesize
|
|
* @pages_per_mr: maximum pages available for registration
|
|
*/
|
|
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;
|
|
struct iser_login_desc login_desc;
|
|
unsigned int rx_desc_head;
|
|
struct iser_rx_desc *rx_descs;
|
|
u32 num_rx_descs;
|
|
unsigned short scsi_sg_tablesize;
|
|
unsigned short pages_per_mr;
|
|
bool snd_w_inv;
|
|
};
|
|
|
|
/**
|
|
* 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 npages;
|
|
struct ib_mr fake_mr;
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
extern unsigned int iser_max_sectors;
|
|
extern bool iser_always_reg;
|
|
|
|
int iser_assign_reg_ops(struct iser_device *device);
|
|
|
|
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_err_comp(struct ib_wc *wc, const char *type);
|
|
void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc);
|
|
void iser_task_rsp(struct ib_cq *cq, struct ib_wc *wc);
|
|
void iser_cmd_comp(struct ib_cq *cq, struct ib_wc *wc);
|
|
void iser_ctrl_comp(struct ib_cq *cq, struct ib_wc *wc);
|
|
void iser_dataout_comp(struct ib_cq *cq, struct ib_wc *wc);
|
|
void iser_reg_comp(struct ib_cq *cq, struct ib_wc *wc);
|
|
|
|
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(struct iscsi_iser_task *task,
|
|
enum iser_data_dir dir,
|
|
bool all_imm);
|
|
void iser_unreg_rdma_mem(struct iscsi_iser_task *task,
|
|
enum iser_data_dir 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_alloc_fmr_pool(struct ib_conn *ib_conn,
|
|
unsigned cmds_max,
|
|
unsigned int size);
|
|
void iser_free_fmr_pool(struct ib_conn *ib_conn);
|
|
int iser_alloc_fastreg_pool(struct ib_conn *ib_conn,
|
|
unsigned cmds_max,
|
|
unsigned int size);
|
|
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 iser_fr_desc *
|
|
iser_reg_desc_get_fr(struct ib_conn *ib_conn);
|
|
void
|
|
iser_reg_desc_put_fr(struct ib_conn *ib_conn,
|
|
struct iser_fr_desc *desc);
|
|
struct iser_fr_desc *
|
|
iser_reg_desc_get_fmr(struct ib_conn *ib_conn);
|
|
void
|
|
iser_reg_desc_put_fmr(struct ib_conn *ib_conn,
|
|
struct iser_fr_desc *desc);
|
|
|
|
static inline struct ib_send_wr *
|
|
iser_tx_next_wr(struct iser_tx_desc *tx_desc)
|
|
{
|
|
struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx].send;
|
|
struct ib_send_wr *last_wr;
|
|
|
|
if (tx_desc->wr_idx) {
|
|
last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1].send;
|
|
last_wr->next = cur_wr;
|
|
}
|
|
tx_desc->wr_idx++;
|
|
|
|
return cur_wr;
|
|
}
|
|
|
|
static inline struct iser_conn *
|
|
to_iser_conn(struct ib_conn *ib_conn)
|
|
{
|
|
return container_of(ib_conn, struct iser_conn, ib_conn);
|
|
}
|
|
|
|
static inline struct iser_rx_desc *
|
|
iser_rx(struct ib_cqe *cqe)
|
|
{
|
|
return container_of(cqe, struct iser_rx_desc, cqe);
|
|
}
|
|
|
|
static inline struct iser_tx_desc *
|
|
iser_tx(struct ib_cqe *cqe)
|
|
{
|
|
return container_of(cqe, struct iser_tx_desc, cqe);
|
|
}
|
|
|
|
static inline struct iser_login_desc *
|
|
iser_login(struct ib_cqe *cqe)
|
|
{
|
|
return container_of(cqe, struct iser_login_desc, cqe);
|
|
}
|
|
|
|
#endif
|