Merge branch 'srp' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
This commit is contained in:
Linus Torvalds
commit
127f2fa31a
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@ -33,4 +33,6 @@ source "drivers/infiniband/hw/mthca/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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endmenu
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@ -1,3 +1,4 @@
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obj-$(CONFIG_INFINIBAND) += core/
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obj-$(CONFIG_INFINIBAND_MTHCA) += hw/mthca/
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obj-$(CONFIG_INFINIBAND_IPOIB) += ulp/ipoib/
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obj-$(CONFIG_INFINIBAND_SRP) += ulp/srp/
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@ -0,0 +1 @@
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obj-$(CONFIG_INFINIBAND_SRP) += ib_srp.o
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@ -0,0 +1,11 @@
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config INFINIBAND_SRP
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tristate "InfiniBand SCSI RDMA Protocol"
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depends on INFINIBAND && SCSI
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---help---
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Support for the SCSI RDMA Protocol over InfiniBand. This
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allows you to access storage devices that speak SRP over
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InfiniBand.
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The SRP protocol is defined by the INCITS T10 technical
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committee. See <http://www.t10.org/>.
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,150 @@
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/*
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* Copyright (c) 2005 Cisco Systems. 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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* $Id: ib_srp.h 3932 2005-11-01 17:19:29Z roland $
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*/
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#ifndef IB_SRP_H
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#define IB_SRP_H
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#include <linux/types.h>
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#include <linux/list.h>
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#include <asm/semaphore.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_cmnd.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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enum {
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SRP_PATH_REC_TIMEOUT_MS = 1000,
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SRP_ABORT_TIMEOUT_MS = 5000,
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SRP_PORT_REDIRECT = 1,
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SRP_DLID_REDIRECT = 2,
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SRP_MAX_IU_LEN = 256,
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SRP_RQ_SHIFT = 6,
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SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT,
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SRP_SQ_SIZE = SRP_RQ_SIZE - 1,
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SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE,
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SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1)
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};
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#define SRP_OP_RECV (1 << 31)
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#define SRP_MAX_INDIRECT ((SRP_MAX_IU_LEN - \
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sizeof (struct srp_cmd) - \
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sizeof (struct srp_indirect_buf)) / 16)
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enum srp_target_state {
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SRP_TARGET_LIVE,
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SRP_TARGET_CONNECTING,
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SRP_TARGET_DEAD,
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SRP_TARGET_REMOVED
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};
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struct srp_host {
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u8 initiator_port_id[16];
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struct ib_device *dev;
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u8 port;
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struct ib_pd *pd;
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struct ib_mr *mr;
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struct class_device class_dev;
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struct list_head target_list;
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struct semaphore target_mutex;
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struct completion released;
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struct list_head list;
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};
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struct srp_request {
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struct list_head list;
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struct scsi_cmnd *scmnd;
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struct srp_iu *cmd;
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struct srp_iu *tsk_mgmt;
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DECLARE_PCI_UNMAP_ADDR(direct_mapping)
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struct completion done;
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short next;
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u8 cmd_done;
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u8 tsk_status;
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};
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struct srp_target_port {
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__be64 id_ext;
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__be64 ioc_guid;
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__be64 service_id;
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struct srp_host *srp_host;
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struct Scsi_Host *scsi_host;
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char target_name[32];
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unsigned int scsi_id;
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struct ib_sa_path_rec path;
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struct ib_sa_query *path_query;
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int path_query_id;
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struct ib_cm_id *cm_id;
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struct ib_cq *cq;
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struct ib_qp *qp;
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int max_ti_iu_len;
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s32 req_lim;
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unsigned rx_head;
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struct srp_iu *rx_ring[SRP_RQ_SIZE];
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unsigned tx_head;
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unsigned tx_tail;
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struct srp_iu *tx_ring[SRP_SQ_SIZE + 1];
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int req_head;
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struct list_head req_queue;
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struct srp_request req_ring[SRP_SQ_SIZE];
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struct work_struct work;
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struct list_head list;
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struct completion done;
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int status;
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enum srp_target_state state;
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};
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struct srp_iu {
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dma_addr_t dma;
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void *buf;
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size_t size;
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enum dma_data_direction direction;
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};
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#endif /* IB_SRP_H */
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@ -0,0 +1,226 @@
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/*
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* Copyright (c) 2005 Cisco Systems. 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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* $Id$
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*/
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#ifndef SCSI_SRP_H
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#define SCSI_SRP_H
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/*
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* Structures and constants for the SCSI RDMA Protocol (SRP) as
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* defined by the INCITS T10 committee. This file was written using
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* draft Revision 16a of the SRP standard.
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*/
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#include <linux/types.h>
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enum {
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SRP_LOGIN_REQ = 0x00,
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SRP_TSK_MGMT = 0x01,
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SRP_CMD = 0x02,
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SRP_I_LOGOUT = 0x03,
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SRP_LOGIN_RSP = 0xc0,
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SRP_RSP = 0xc1,
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SRP_LOGIN_REJ = 0xc2,
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SRP_T_LOGOUT = 0x80,
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SRP_CRED_REQ = 0x81,
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SRP_AER_REQ = 0x82,
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SRP_CRED_RSP = 0x41,
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SRP_AER_RSP = 0x42
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};
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enum {
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SRP_BUF_FORMAT_DIRECT = 1 << 1,
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SRP_BUF_FORMAT_INDIRECT = 1 << 2
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};
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enum {
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SRP_NO_DATA_DESC = 0,
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SRP_DATA_DESC_DIRECT = 1,
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SRP_DATA_DESC_INDIRECT = 2
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};
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enum {
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SRP_TSK_ABORT_TASK = 0x01,
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SRP_TSK_ABORT_TASK_SET = 0x02,
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SRP_TSK_CLEAR_TASK_SET = 0x04,
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SRP_TSK_LUN_RESET = 0x08,
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SRP_TSK_CLEAR_ACA = 0x40
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};
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enum srp_login_rej_reason {
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SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
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SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
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SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
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SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
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SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
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SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
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SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
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};
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struct srp_direct_buf {
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__be64 va;
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__be32 key;
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__be32 len;
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};
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/*
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* We need the packed attribute because the SRP spec puts the list of
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* descriptors at an offset of 20, which is not aligned to the size
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* of struct srp_direct_buf.
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*/
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struct srp_indirect_buf {
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struct srp_direct_buf table_desc;
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__be32 len;
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struct srp_direct_buf desc_list[0] __attribute__((packed));
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};
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enum {
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SRP_MULTICHAN_SINGLE = 0,
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SRP_MULTICHAN_MULTI = 1
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};
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struct srp_login_req {
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u8 opcode;
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u8 reserved1[7];
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u64 tag;
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__be32 req_it_iu_len;
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u8 reserved2[4];
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__be16 req_buf_fmt;
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u8 req_flags;
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u8 reserved3[5];
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u8 initiator_port_id[16];
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u8 target_port_id[16];
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};
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struct srp_login_rsp {
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u8 opcode;
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u8 reserved1[3];
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__be32 req_lim_delta;
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u64 tag;
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__be32 max_it_iu_len;
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__be32 max_ti_iu_len;
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__be16 buf_fmt;
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u8 rsp_flags;
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u8 reserved2[25];
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};
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struct srp_login_rej {
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u8 opcode;
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u8 reserved1[3];
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__be32 reason;
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u64 tag;
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u8 reserved2[8];
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__be16 buf_fmt;
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u8 reserved3[6];
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};
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struct srp_i_logout {
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u8 opcode;
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u8 reserved[7];
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u64 tag;
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};
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struct srp_t_logout {
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u8 opcode;
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u8 sol_not;
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u8 reserved[2];
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__be32 reason;
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u64 tag;
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};
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/*
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* We need the packed attribute because the SRP spec only aligns the
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* 8-byte LUN field to 4 bytes.
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*/
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struct srp_tsk_mgmt {
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u8 opcode;
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u8 sol_not;
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u8 reserved1[6];
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u64 tag;
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u8 reserved2[4];
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__be64 lun __attribute__((packed));
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u8 reserved3[2];
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u8 tsk_mgmt_func;
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u8 reserved4;
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u64 task_tag;
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u8 reserved5[8];
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};
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/*
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* We need the packed attribute because the SRP spec only aligns the
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* 8-byte LUN field to 4 bytes.
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*/
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struct srp_cmd {
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u8 opcode;
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u8 sol_not;
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u8 reserved1[3];
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u8 buf_fmt;
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u8 data_out_desc_cnt;
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u8 data_in_desc_cnt;
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u64 tag;
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u8 reserved2[4];
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__be64 lun __attribute__((packed));
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u8 reserved3;
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u8 task_attr;
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u8 reserved4;
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u8 add_cdb_len;
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u8 cdb[16];
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u8 add_data[0];
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};
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enum {
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SRP_RSP_FLAG_RSPVALID = 1 << 0,
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SRP_RSP_FLAG_SNSVALID = 1 << 1,
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SRP_RSP_FLAG_DOOVER = 1 << 2,
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SRP_RSP_FLAG_DOUNDER = 1 << 3,
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SRP_RSP_FLAG_DIOVER = 1 << 4,
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SRP_RSP_FLAG_DIUNDER = 1 << 5
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};
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struct srp_rsp {
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u8 opcode;
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u8 sol_not;
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u8 reserved1[2];
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__be32 req_lim_delta;
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u64 tag;
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u8 reserved2[2];
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u8 flags;
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u8 status;
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__be32 data_out_res_cnt;
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__be32 data_in_res_cnt;
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__be32 sense_data_len;
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__be32 resp_data_len;
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u8 data[0];
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};
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#endif /* SCSI_SRP_H */
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