ib_srpt: Initial SRP Target merge for v3.3-rc1
This patch adds the kernel module ib_srpt SCSI RDMA Protocol (SRP) target implementation conforming to the SRP r16a specification for the mainline drivers/target infrastructure. This driver was originally developed by Vu Pham and has been optimized by Bart Van Assche and merged into upstream LIO based on his srpt-lio-4.1 branch here: https://github.com/bvanassche/srpt-lio/commits/srpt-lio-4.1/ This updated patch also contains the following two changes from lio-core-2.6.git/master. One is to fix a bug with 1 >= task->task_sg[] chained mappings in ib_srpt, and the other to convert the configfs control plane to reference IB Port GUID and struct srpt_port directly following mainline v4.x target_core_fabric_configfs.c convertion for ib_srpt to work with rtslib/rtsadmin v2 code. These seperate patches can be found here: ib_srpt: Fix bug with chainged SGLs in srpt_map_sg_to_ib_sge http://www.risingtidesystems.com/git/?p=lio-core-2.6.git;a=commitdiff;h=ea485147563b6555a97dbf811825fbb586519252 ib_srpt: Convert se_wwn endpoint reference to struct srpt_port->port_wwn http://www.risingtidesystems.com/git/?p=lio-core-2.6.git;a=commitdiff;h=4e544a210acb227df1bb4ca5086e65bdf4e648ea This also includes the following recent v1 -> v2 review changes: ib_srpt: Fix potential out-of-bounds array access ib_srpt: Avoid failed multipart RDMA transfers ib_srpt: Fix srpt_alloc_fabric_acl failure case return value ib_srpt: Update comments to reference $driver/$port layout ib_srpt: Fix sport->port_guid formatting code ib_srpt: Remove legacy use_port_guid_in_session_name module parameter ib_srpt: Convert srp_max_rdma_size into per port configfs attribute ib_srpt: Convert srp_max_rsp_size into per port configfs attribute ib_srpt: Convert srpt_sq_size into per port configfs attribute and v2 -> v3 review changes: ib_srpt: Fix possible race with srp_sq_size in srpt_create_ch_ib ib_srpt: Fix possible race with srp_max_rsp_size in srpt_release_channel_work ib_srpt: Fix up MAX_SRPT_RDMA_SIZE define ib_srpt: Make srpt_map_sg_to_ib_sge() failure case return -EAGAIN ib_srpt: Convert port_guid to use subnet_prefix + interface_id formatting ib_srpt: Make srpt_check_stop_free return kref_put status ib_srpt: Make compilation with BUG=n proceed` ib_srpt: Use new target_core_fabric.h include ib_srpt: Check hex2bin() return code to silence build warning Cc: Bart Van Assche <bvanassche@acm.org> Cc: Roland Dreier <roland@purestorage.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Vu Pham <vu@mellanox.com> Cc: David Dillow <dillowda@ornl.gov> Signed-off-by: Nicholas A. Bellinger <nab@risingtidesystems.com>
This commit is contained in:
Bart Van Assche
Nicholas Bellinger
parent
895f302252
commit
a42d985bd5
7 changed files with 4672 additions and 0 deletions
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@ -55,6 +55,7 @@ source "drivers/infiniband/hw/nes/Kconfig"
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source "drivers/infiniband/ulp/ipoib/Kconfig"
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source "drivers/infiniband/ulp/srp/Kconfig"
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source "drivers/infiniband/ulp/srpt/Kconfig"
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source "drivers/infiniband/ulp/iser/Kconfig"
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@ -10,4 +10,5 @@ obj-$(CONFIG_MLX4_INFINIBAND) += hw/mlx4/
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obj-$(CONFIG_INFINIBAND_NES) += hw/nes/
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obj-$(CONFIG_INFINIBAND_IPOIB) += ulp/ipoib/
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obj-$(CONFIG_INFINIBAND_SRP) += ulp/srp/
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obj-$(CONFIG_INFINIBAND_SRPT) += ulp/srpt/
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obj-$(CONFIG_INFINIBAND_ISER) += ulp/iser/
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12
drivers/infiniband/ulp/srpt/Kconfig
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12
drivers/infiniband/ulp/srpt/Kconfig
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@ -0,0 +1,12 @@
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config INFINIBAND_SRPT
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tristate "InfiniBand SCSI RDMA Protocol target support"
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depends on INFINIBAND && TARGET_CORE
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---help---
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Support for the SCSI RDMA Protocol (SRP) Target driver. The
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SRP protocol is a protocol that allows an initiator to access
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a block storage device on another host (target) over a network
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that supports the RDMA protocol. Currently the RDMA protocol is
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supported by InfiniBand and by iWarp network hardware. More
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information about the SRP protocol can be found on the website
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of the INCITS T10 technical committee (http://www.t10.org/).
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2
drivers/infiniband/ulp/srpt/Makefile
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2
drivers/infiniband/ulp/srpt/Makefile
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@ -0,0 +1,2 @@
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ccflags-y := -Idrivers/target
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obj-$(CONFIG_INFINIBAND_SRPT) += ib_srpt.o
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139
drivers/infiniband/ulp/srpt/ib_dm_mad.h
Normal file
139
drivers/infiniband/ulp/srpt/ib_dm_mad.h
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@ -0,0 +1,139 @@
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/*
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* Copyright (c) 2006 - 2009 Mellanox Technology Inc. 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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*/
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#ifndef IB_DM_MAD_H
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#define IB_DM_MAD_H
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#include <linux/types.h>
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#include <rdma/ib_mad.h>
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enum {
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/*
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* See also section 13.4.7 Status Field, table 115 MAD Common Status
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* Field Bit Values and also section 16.3.1.1 Status Field in the
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* InfiniBand Architecture Specification.
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*/
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DM_MAD_STATUS_UNSUP_METHOD = 0x0008,
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DM_MAD_STATUS_UNSUP_METHOD_ATTR = 0x000c,
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DM_MAD_STATUS_INVALID_FIELD = 0x001c,
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DM_MAD_STATUS_NO_IOC = 0x0100,
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/*
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* See also the Device Management chapter, section 16.3.3 Attributes,
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* table 279 Device Management Attributes in the InfiniBand
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* Architecture Specification.
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*/
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DM_ATTR_CLASS_PORT_INFO = 0x01,
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DM_ATTR_IOU_INFO = 0x10,
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DM_ATTR_IOC_PROFILE = 0x11,
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DM_ATTR_SVC_ENTRIES = 0x12
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};
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struct ib_dm_hdr {
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u8 reserved[28];
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};
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/*
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* Structure of management datagram sent by the SRP target implementation.
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* Contains a management datagram header, reliable multi-packet transaction
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* protocol (RMPP) header and ib_dm_hdr. Notes:
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* - The SRP target implementation does not use RMPP or ib_dm_hdr when sending
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* management datagrams.
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* - The header size must be exactly 64 bytes (IB_MGMT_DEVICE_HDR), since this
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* is the header size that is passed to ib_create_send_mad() in ib_srpt.c.
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* - The maximum supported size for a management datagram when not using RMPP
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* is 256 bytes -- 64 bytes header and 192 (IB_MGMT_DEVICE_DATA) bytes data.
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*/
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struct ib_dm_mad {
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struct ib_mad_hdr mad_hdr;
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struct ib_rmpp_hdr rmpp_hdr;
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struct ib_dm_hdr dm_hdr;
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u8 data[IB_MGMT_DEVICE_DATA];
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};
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/*
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* IOUnitInfo as defined in section 16.3.3.3 IOUnitInfo of the InfiniBand
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* Architecture Specification.
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*/
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struct ib_dm_iou_info {
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__be16 change_id;
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u8 max_controllers;
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u8 op_rom;
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u8 controller_list[128];
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};
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/*
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* IOControllerprofile as defined in section 16.3.3.4 IOControllerProfile of
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* the InfiniBand Architecture Specification.
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*/
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struct ib_dm_ioc_profile {
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__be64 guid;
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__be32 vendor_id;
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__be32 device_id;
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__be16 device_version;
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__be16 reserved1;
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__be32 subsys_vendor_id;
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__be32 subsys_device_id;
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__be16 io_class;
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__be16 io_subclass;
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__be16 protocol;
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__be16 protocol_version;
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__be16 service_conn;
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__be16 initiators_supported;
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__be16 send_queue_depth;
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u8 reserved2;
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u8 rdma_read_depth;
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__be32 send_size;
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__be32 rdma_size;
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u8 op_cap_mask;
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u8 svc_cap_mask;
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u8 num_svc_entries;
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u8 reserved3[9];
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u8 id_string[64];
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};
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struct ib_dm_svc_entry {
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u8 name[40];
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__be64 id;
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};
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/*
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* See also section 16.3.3.5 ServiceEntries in the InfiniBand Architecture
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* Specification. See also section B.7, table B.8 in the T10 SRP r16a document.
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*/
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struct ib_dm_svc_entries {
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struct ib_dm_svc_entry service_entries[4];
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};
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#endif
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4073
drivers/infiniband/ulp/srpt/ib_srpt.c
Normal file
4073
drivers/infiniband/ulp/srpt/ib_srpt.c
Normal file
File diff suppressed because it is too large
Load diff
444
drivers/infiniband/ulp/srpt/ib_srpt.h
Normal file
444
drivers/infiniband/ulp/srpt/ib_srpt.h
Normal file
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@ -0,0 +1,444 @@
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/*
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* Copyright (c) 2006 - 2009 Mellanox Technology Inc. All rights reserved.
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* Copyright (C) 2009 - 2010 Bart Van Assche <bvanassche@acm.org>.
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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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*/
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#ifndef IB_SRPT_H
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#define IB_SRPT_H
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#include <linux/version.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/wait.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_sa.h>
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#include <rdma/ib_cm.h>
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#include <scsi/srp.h>
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#include "ib_dm_mad.h"
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/*
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* The prefix the ServiceName field must start with in the device management
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* ServiceEntries attribute pair. See also the SRP specification.
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*/
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#define SRP_SERVICE_NAME_PREFIX "SRP.T10:"
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enum {
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/*
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* SRP IOControllerProfile attributes for SRP target ports that have
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* not been defined in <scsi/srp.h>. Source: section B.7, table B.7
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* in the SRP specification.
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*/
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SRP_PROTOCOL = 0x0108,
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SRP_PROTOCOL_VERSION = 0x0001,
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SRP_IO_SUBCLASS = 0x609e,
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SRP_SEND_TO_IOC = 0x01,
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SRP_SEND_FROM_IOC = 0x02,
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SRP_RDMA_READ_FROM_IOC = 0x08,
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SRP_RDMA_WRITE_FROM_IOC = 0x20,
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/*
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* srp_login_cmd.req_flags bitmasks. See also table 9 in the SRP
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* specification.
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*/
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SRP_MTCH_ACTION = 0x03, /* MULTI-CHANNEL ACTION */
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SRP_LOSOLNT = 0x10, /* logout solicited notification */
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SRP_CRSOLNT = 0x20, /* credit request solicited notification */
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SRP_AESOLNT = 0x40, /* asynchronous event solicited notification */
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/*
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* srp_cmd.sol_nt / srp_tsk_mgmt.sol_not bitmasks. See also tables
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* 18 and 20 in the SRP specification.
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*/
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SRP_SCSOLNT = 0x02, /* SCSOLNT = successful solicited notification */
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SRP_UCSOLNT = 0x04, /* UCSOLNT = unsuccessful solicited notification */
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/*
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* srp_rsp.sol_not / srp_t_logout.sol_not bitmasks. See also tables
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* 16 and 22 in the SRP specification.
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*/
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SRP_SOLNT = 0x01, /* SOLNT = solicited notification */
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/* See also table 24 in the SRP specification. */
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SRP_TSK_MGMT_SUCCESS = 0x00,
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SRP_TSK_MGMT_FUNC_NOT_SUPP = 0x04,
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SRP_TSK_MGMT_FAILED = 0x05,
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/* See also table 21 in the SRP specification. */
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SRP_CMD_SIMPLE_Q = 0x0,
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SRP_CMD_HEAD_OF_Q = 0x1,
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SRP_CMD_ORDERED_Q = 0x2,
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SRP_CMD_ACA = 0x4,
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SRP_LOGIN_RSP_MULTICHAN_NO_CHAN = 0x0,
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SRP_LOGIN_RSP_MULTICHAN_TERMINATED = 0x1,
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SRP_LOGIN_RSP_MULTICHAN_MAINTAINED = 0x2,
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SRPT_DEF_SG_TABLESIZE = 128,
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SRPT_DEF_SG_PER_WQE = 16,
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MIN_SRPT_SQ_SIZE = 16,
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DEF_SRPT_SQ_SIZE = 4096,
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SRPT_RQ_SIZE = 128,
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MIN_SRPT_SRQ_SIZE = 4,
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DEFAULT_SRPT_SRQ_SIZE = 4095,
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MAX_SRPT_SRQ_SIZE = 65535,
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MAX_SRPT_RDMA_SIZE = 1U << 24,
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MAX_SRPT_RSP_SIZE = 1024,
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MIN_MAX_REQ_SIZE = 996,
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DEFAULT_MAX_REQ_SIZE
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= sizeof(struct srp_cmd)/*48*/
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+ sizeof(struct srp_indirect_buf)/*20*/
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+ 128 * sizeof(struct srp_direct_buf)/*16*/,
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MIN_MAX_RSP_SIZE = sizeof(struct srp_rsp)/*36*/ + 4,
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DEFAULT_MAX_RSP_SIZE = 256, /* leaves 220 bytes for sense data */
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DEFAULT_MAX_RDMA_SIZE = 65536,
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};
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enum srpt_opcode {
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SRPT_RECV,
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SRPT_SEND,
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SRPT_RDMA_MID,
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SRPT_RDMA_ABORT,
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SRPT_RDMA_READ_LAST,
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SRPT_RDMA_WRITE_LAST,
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};
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static inline u64 encode_wr_id(u8 opcode, u32 idx)
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{
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return ((u64)opcode << 32) | idx;
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}
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static inline enum srpt_opcode opcode_from_wr_id(u64 wr_id)
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{
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return wr_id >> 32;
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}
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static inline u32 idx_from_wr_id(u64 wr_id)
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{
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return (u32)wr_id;
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}
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struct rdma_iu {
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u64 raddr;
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u32 rkey;
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struct ib_sge *sge;
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u32 sge_cnt;
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int mem_id;
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};
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/**
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* enum srpt_command_state - SCSI command state managed by SRPT.
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* @SRPT_STATE_NEW: New command arrived and is being processed.
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* @SRPT_STATE_NEED_DATA: Processing a write or bidir command and waiting
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* for data arrival.
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* @SRPT_STATE_DATA_IN: Data for the write or bidir command arrived and is
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* being processed.
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* @SRPT_STATE_CMD_RSP_SENT: SRP_RSP for SRP_CMD has been sent.
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* @SRPT_STATE_MGMT: Processing a SCSI task management command.
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* @SRPT_STATE_MGMT_RSP_SENT: SRP_RSP for SRP_TSK_MGMT has been sent.
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* @SRPT_STATE_DONE: Command processing finished successfully, command
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* processing has been aborted or command processing
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* failed.
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*/
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enum srpt_command_state {
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SRPT_STATE_NEW = 0,
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SRPT_STATE_NEED_DATA = 1,
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SRPT_STATE_DATA_IN = 2,
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SRPT_STATE_CMD_RSP_SENT = 3,
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SRPT_STATE_MGMT = 4,
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SRPT_STATE_MGMT_RSP_SENT = 5,
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SRPT_STATE_DONE = 6,
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};
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/**
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* struct srpt_ioctx - Shared SRPT I/O context information.
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* @buf: Pointer to the buffer.
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* @dma: DMA address of the buffer.
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* @index: Index of the I/O context in its ioctx_ring array.
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*/
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struct srpt_ioctx {
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void *buf;
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dma_addr_t dma;
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uint32_t index;
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};
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/**
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* struct srpt_recv_ioctx - SRPT receive I/O context.
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* @ioctx: See above.
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* @wait_list: Node for insertion in srpt_rdma_ch.cmd_wait_list.
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*/
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struct srpt_recv_ioctx {
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struct srpt_ioctx ioctx;
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struct list_head wait_list;
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};
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/**
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* struct srpt_send_ioctx - SRPT send I/O context.
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* @ioctx: See above.
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* @ch: Channel pointer.
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* @free_list: Node in srpt_rdma_ch.free_list.
|
||||
* @n_rbuf: Number of data buffers in the received SRP command.
|
||||
* @rbufs: Pointer to SRP data buffer array.
|
||||
* @single_rbuf: SRP data buffer if the command has only a single buffer.
|
||||
* @sg: Pointer to sg-list associated with this I/O context.
|
||||
* @sg_cnt: SG-list size.
|
||||
* @mapped_sg_count: ib_dma_map_sg() return value.
|
||||
* @n_rdma_ius: Number of elements in the rdma_ius array.
|
||||
* @rdma_ius: Array with information about the RDMA mapping.
|
||||
* @tag: Tag of the received SRP information unit.
|
||||
* @spinlock: Protects 'state'.
|
||||
* @state: I/O context state.
|
||||
* @rdma_aborted: If initiating a multipart RDMA transfer failed, whether
|
||||
* the already initiated transfers have finished.
|
||||
* @cmd: Target core command data structure.
|
||||
* @sense_data: SCSI sense data.
|
||||
*/
|
||||
struct srpt_send_ioctx {
|
||||
struct srpt_ioctx ioctx;
|
||||
struct srpt_rdma_ch *ch;
|
||||
struct kref kref;
|
||||
struct rdma_iu *rdma_ius;
|
||||
struct srp_direct_buf *rbufs;
|
||||
struct srp_direct_buf single_rbuf;
|
||||
struct scatterlist *sg;
|
||||
struct list_head free_list;
|
||||
spinlock_t spinlock;
|
||||
enum srpt_command_state state;
|
||||
bool rdma_aborted;
|
||||
struct se_cmd cmd;
|
||||
struct completion tx_done;
|
||||
u64 tag;
|
||||
int sg_cnt;
|
||||
int mapped_sg_count;
|
||||
u16 n_rdma_ius;
|
||||
u8 n_rdma;
|
||||
u8 n_rbuf;
|
||||
bool queue_status_only;
|
||||
u8 sense_data[SCSI_SENSE_BUFFERSIZE];
|
||||
};
|
||||
|
||||
/**
|
||||
* enum rdma_ch_state - SRP channel state.
|
||||
* @CH_CONNECTING: QP is in RTR state; waiting for RTU.
|
||||
* @CH_LIVE: QP is in RTS state.
|
||||
* @CH_DISCONNECTING: DREQ has been received; waiting for DREP
|
||||
* or DREQ has been send and waiting for DREP
|
||||
* or .
|
||||
* @CH_DRAINING: QP is in ERR state; waiting for last WQE event.
|
||||
* @CH_RELEASING: Last WQE event has been received; releasing resources.
|
||||
*/
|
||||
enum rdma_ch_state {
|
||||
CH_CONNECTING,
|
||||
CH_LIVE,
|
||||
CH_DISCONNECTING,
|
||||
CH_DRAINING,
|
||||
CH_RELEASING
|
||||
};
|
||||
|
||||
/**
|
||||
* struct srpt_rdma_ch - RDMA channel.
|
||||
* @wait_queue: Allows the kernel thread to wait for more work.
|
||||
* @thread: Kernel thread that processes the IB queues associated with
|
||||
* the channel.
|
||||
* @cm_id: IB CM ID associated with the channel.
|
||||
* @qp: IB queue pair used for communicating over this channel.
|
||||
* @cq: IB completion queue for this channel.
|
||||
* @rq_size: IB receive queue size.
|
||||
* @rsp_size IB response message size in bytes.
|
||||
* @sq_wr_avail: number of work requests available in the send queue.
|
||||
* @sport: pointer to the information of the HCA port used by this
|
||||
* channel.
|
||||
* @i_port_id: 128-bit initiator port identifier copied from SRP_LOGIN_REQ.
|
||||
* @t_port_id: 128-bit target port identifier copied from SRP_LOGIN_REQ.
|
||||
* @max_ti_iu_len: maximum target-to-initiator information unit length.
|
||||
* @req_lim: request limit: maximum number of requests that may be sent
|
||||
* by the initiator without having received a response.
|
||||
* @req_lim_delta: Number of credits not yet sent back to the initiator.
|
||||
* @spinlock: Protects free_list and state.
|
||||
* @free_list: Head of list with free send I/O contexts.
|
||||
* @state: channel state. See also enum rdma_ch_state.
|
||||
* @ioctx_ring: Send ring.
|
||||
* @wc: IB work completion array for srpt_process_completion().
|
||||
* @list: Node for insertion in the srpt_device.rch_list list.
|
||||
* @cmd_wait_list: List of SCSI commands that arrived before the RTU event. This
|
||||
* list contains struct srpt_ioctx elements and is protected
|
||||
* against concurrent modification by the cm_id spinlock.
|
||||
* @sess: Session information associated with this SRP channel.
|
||||
* @sess_name: Session name.
|
||||
* @release_work: Allows scheduling of srpt_release_channel().
|
||||
* @release_done: Enables waiting for srpt_release_channel() completion.
|
||||
*/
|
||||
struct srpt_rdma_ch {
|
||||
wait_queue_head_t wait_queue;
|
||||
struct task_struct *thread;
|
||||
struct ib_cm_id *cm_id;
|
||||
struct ib_qp *qp;
|
||||
struct ib_cq *cq;
|
||||
int rq_size;
|
||||
u32 rsp_size;
|
||||
atomic_t sq_wr_avail;
|
||||
struct srpt_port *sport;
|
||||
u8 i_port_id[16];
|
||||
u8 t_port_id[16];
|
||||
int max_ti_iu_len;
|
||||
atomic_t req_lim;
|
||||
atomic_t req_lim_delta;
|
||||
spinlock_t spinlock;
|
||||
struct list_head free_list;
|
||||
enum rdma_ch_state state;
|
||||
struct srpt_send_ioctx **ioctx_ring;
|
||||
struct ib_wc wc[16];
|
||||
struct list_head list;
|
||||
struct list_head cmd_wait_list;
|
||||
struct se_session *sess;
|
||||
u8 sess_name[36];
|
||||
struct work_struct release_work;
|
||||
struct completion *release_done;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct srpt_port_attib - Attributes for SRPT port
|
||||
* @srp_max_rdma_size: Maximum size of SRP RDMA transfers for new connections.
|
||||
* @srp_max_rsp_size: Maximum size of SRP response messages in bytes.
|
||||
* @srp_sq_size: Shared receive queue (SRQ) size.
|
||||
*/
|
||||
struct srpt_port_attrib {
|
||||
u32 srp_max_rdma_size;
|
||||
u32 srp_max_rsp_size;
|
||||
u32 srp_sq_size;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct srpt_port - Information associated by SRPT with a single IB port.
|
||||
* @sdev: backpointer to the HCA information.
|
||||
* @mad_agent: per-port management datagram processing information.
|
||||
* @enabled: Whether or not this target port is enabled.
|
||||
* @port_guid: ASCII representation of Port GUID
|
||||
* @port: one-based port number.
|
||||
* @sm_lid: cached value of the port's sm_lid.
|
||||
* @lid: cached value of the port's lid.
|
||||
* @gid: cached value of the port's gid.
|
||||
* @port_acl_lock spinlock for port_acl_list:
|
||||
* @work: work structure for refreshing the aforementioned cached values.
|
||||
* @port_tpg_1 Target portal group = 1 data.
|
||||
* @port_wwn: Target core WWN data.
|
||||
* @port_acl_list: Head of the list with all node ACLs for this port.
|
||||
*/
|
||||
struct srpt_port {
|
||||
struct srpt_device *sdev;
|
||||
struct ib_mad_agent *mad_agent;
|
||||
bool enabled;
|
||||
u8 port_guid[64];
|
||||
u8 port;
|
||||
u16 sm_lid;
|
||||
u16 lid;
|
||||
union ib_gid gid;
|
||||
spinlock_t port_acl_lock;
|
||||
struct work_struct work;
|
||||
struct se_portal_group port_tpg_1;
|
||||
struct se_wwn port_wwn;
|
||||
struct list_head port_acl_list;
|
||||
struct srpt_port_attrib port_attrib;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct srpt_device - Information associated by SRPT with a single HCA.
|
||||
* @device: Backpointer to the struct ib_device managed by the IB core.
|
||||
* @pd: IB protection domain.
|
||||
* @mr: L_Key (local key) with write access to all local memory.
|
||||
* @srq: Per-HCA SRQ (shared receive queue).
|
||||
* @cm_id: Connection identifier.
|
||||
* @dev_attr: Attributes of the InfiniBand device as obtained during the
|
||||
* ib_client.add() callback.
|
||||
* @srq_size: SRQ size.
|
||||
* @ioctx_ring: Per-HCA SRQ.
|
||||
* @rch_list: Per-device channel list -- see also srpt_rdma_ch.list.
|
||||
* @ch_releaseQ: Enables waiting for removal from rch_list.
|
||||
* @spinlock: Protects rch_list and tpg.
|
||||
* @port: Information about the ports owned by this HCA.
|
||||
* @event_handler: Per-HCA asynchronous IB event handler.
|
||||
* @list: Node in srpt_dev_list.
|
||||
*/
|
||||
struct srpt_device {
|
||||
struct ib_device *device;
|
||||
struct ib_pd *pd;
|
||||
struct ib_mr *mr;
|
||||
struct ib_srq *srq;
|
||||
struct ib_cm_id *cm_id;
|
||||
struct ib_device_attr dev_attr;
|
||||
int srq_size;
|
||||
struct srpt_recv_ioctx **ioctx_ring;
|
||||
struct list_head rch_list;
|
||||
wait_queue_head_t ch_releaseQ;
|
||||
spinlock_t spinlock;
|
||||
struct srpt_port port[2];
|
||||
struct ib_event_handler event_handler;
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct srpt_node_acl - Per-initiator ACL data (managed via configfs).
|
||||
* @i_port_id: 128-bit SRP initiator port ID.
|
||||
* @sport: port information.
|
||||
* @nacl: Target core node ACL information.
|
||||
* @list: Element of the per-HCA ACL list.
|
||||
*/
|
||||
struct srpt_node_acl {
|
||||
u8 i_port_id[16];
|
||||
struct srpt_port *sport;
|
||||
struct se_node_acl nacl;
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
/*
|
||||
* SRP-releated SCSI persistent reservation definitions.
|
||||
*
|
||||
* See also SPC4r28, section 7.6.1 (Protocol specific parameters introduction).
|
||||
* See also SPC4r28, section 7.6.4.5 (TransportID for initiator ports using
|
||||
* SCSI over an RDMA interface).
|
||||
*/
|
||||
|
||||
enum {
|
||||
SCSI_TRANSPORTID_PROTOCOLID_SRP = 4,
|
||||
};
|
||||
|
||||
struct spc_rdma_transport_id {
|
||||
uint8_t protocol_identifier;
|
||||
uint8_t reserved[7];
|
||||
uint8_t i_port_id[16];
|
||||
};
|
||||
|
||||
#endif /* IB_SRPT_H */
|
||||
Loading…
Reference in a new issue