IB: Add SCSI RDMA Protocol (SRP) initiator
Add an InfiniBand SCSI RDMA Protocol (SRP) initiator. This driver is used to talk talk to InfiniBand SRP targets (storage devices). Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier
parent
89fbb69c4f
commit
aef9ec39c4
|
|
@ -33,4 +33,6 @@ source "drivers/infiniband/hw/mthca/Kconfig"
|
|||
|
||||
source "drivers/infiniband/ulp/ipoib/Kconfig"
|
||||
|
||||
source "drivers/infiniband/ulp/srp/Kconfig"
|
||||
|
||||
endmenu
|
||||
|
|
|
|||
|
|
@ -1,3 +1,4 @@
|
|||
obj-$(CONFIG_INFINIBAND) += core/
|
||||
obj-$(CONFIG_INFINIBAND_MTHCA) += hw/mthca/
|
||||
obj-$(CONFIG_INFINIBAND_IPOIB) += ulp/ipoib/
|
||||
obj-$(CONFIG_INFINIBAND_SRP) += ulp/srp/
|
||||
|
|
|
|||
|
|
@ -0,0 +1 @@
|
|||
obj-$(CONFIG_INFINIBAND_SRP) += ib_srp.o
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
config INFINIBAND_SRP
|
||||
tristate "InfiniBand SCSI RDMA Protocol"
|
||||
depends on INFINIBAND && SCSI
|
||||
---help---
|
||||
Support for the SCSI RDMA Protocol over InfiniBand. This
|
||||
allows you to access storage devices that speak SRP over
|
||||
InfiniBand.
|
||||
|
||||
The SRP protocol is defined by the INCITS T10 technical
|
||||
committee. See <http://www.t10.org/>.
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,150 @@
|
|||
/*
|
||||
* Copyright (c) 2005 Cisco Systems. All rights reserved.
|
||||
*
|
||||
* This software is available to you under a choice of one of two
|
||||
* licenses. You may choose to be licensed under the terms of the GNU
|
||||
* General Public License (GPL) Version 2, available from the file
|
||||
* COPYING in the main directory of this source tree, or the
|
||||
* OpenIB.org BSD license below:
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or
|
||||
* without modification, are permitted provided that the following
|
||||
* conditions are met:
|
||||
*
|
||||
* - Redistributions of source code must retain the above
|
||||
* copyright notice, this list of conditions and the following
|
||||
* disclaimer.
|
||||
*
|
||||
* - Redistributions in binary form must reproduce the above
|
||||
* copyright notice, this list of conditions and the following
|
||||
* disclaimer in the documentation and/or other materials
|
||||
* provided with the distribution.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||||
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||||
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*
|
||||
* $Id: ib_srp.h 3932 2005-11-01 17:19:29Z roland $
|
||||
*/
|
||||
|
||||
#ifndef IB_SRP_H
|
||||
#define IB_SRP_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/list.h>
|
||||
|
||||
#include <asm/semaphore.h>
|
||||
|
||||
#include <scsi/scsi_host.h>
|
||||
#include <scsi/scsi_cmnd.h>
|
||||
|
||||
#include <rdma/ib_verbs.h>
|
||||
#include <rdma/ib_sa.h>
|
||||
#include <rdma/ib_cm.h>
|
||||
|
||||
enum {
|
||||
SRP_PATH_REC_TIMEOUT_MS = 1000,
|
||||
SRP_ABORT_TIMEOUT_MS = 5000,
|
||||
|
||||
SRP_PORT_REDIRECT = 1,
|
||||
SRP_DLID_REDIRECT = 2,
|
||||
|
||||
SRP_MAX_IU_LEN = 256,
|
||||
|
||||
SRP_RQ_SHIFT = 6,
|
||||
SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT,
|
||||
SRP_SQ_SIZE = SRP_RQ_SIZE - 1,
|
||||
SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE,
|
||||
|
||||
SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1)
|
||||
};
|
||||
|
||||
#define SRP_OP_RECV (1 << 31)
|
||||
#define SRP_MAX_INDIRECT ((SRP_MAX_IU_LEN - \
|
||||
sizeof (struct srp_cmd) - \
|
||||
sizeof (struct srp_indirect_buf)) / 16)
|
||||
|
||||
enum srp_target_state {
|
||||
SRP_TARGET_LIVE,
|
||||
SRP_TARGET_CONNECTING,
|
||||
SRP_TARGET_DEAD,
|
||||
SRP_TARGET_REMOVED
|
||||
};
|
||||
|
||||
struct srp_host {
|
||||
u8 initiator_port_id[16];
|
||||
struct ib_device *dev;
|
||||
u8 port;
|
||||
struct ib_pd *pd;
|
||||
struct ib_mr *mr;
|
||||
struct class_device class_dev;
|
||||
struct list_head target_list;
|
||||
struct semaphore target_mutex;
|
||||
struct completion released;
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
struct srp_request {
|
||||
struct list_head list;
|
||||
struct scsi_cmnd *scmnd;
|
||||
struct srp_iu *cmd;
|
||||
struct srp_iu *tsk_mgmt;
|
||||
DECLARE_PCI_UNMAP_ADDR(direct_mapping)
|
||||
struct completion done;
|
||||
short next;
|
||||
u8 cmd_done;
|
||||
u8 tsk_status;
|
||||
};
|
||||
|
||||
struct srp_target_port {
|
||||
__be64 id_ext;
|
||||
__be64 ioc_guid;
|
||||
__be64 service_id;
|
||||
struct srp_host *srp_host;
|
||||
struct Scsi_Host *scsi_host;
|
||||
char target_name[32];
|
||||
unsigned int scsi_id;
|
||||
|
||||
struct ib_sa_path_rec path;
|
||||
struct ib_sa_query *path_query;
|
||||
int path_query_id;
|
||||
|
||||
struct ib_cm_id *cm_id;
|
||||
struct ib_cq *cq;
|
||||
struct ib_qp *qp;
|
||||
|
||||
int max_ti_iu_len;
|
||||
s32 req_lim;
|
||||
|
||||
unsigned rx_head;
|
||||
struct srp_iu *rx_ring[SRP_RQ_SIZE];
|
||||
|
||||
unsigned tx_head;
|
||||
unsigned tx_tail;
|
||||
struct srp_iu *tx_ring[SRP_SQ_SIZE + 1];
|
||||
|
||||
int req_head;
|
||||
struct list_head req_queue;
|
||||
struct srp_request req_ring[SRP_SQ_SIZE];
|
||||
|
||||
struct work_struct work;
|
||||
|
||||
struct list_head list;
|
||||
struct completion done;
|
||||
int status;
|
||||
enum srp_target_state state;
|
||||
};
|
||||
|
||||
struct srp_iu {
|
||||
dma_addr_t dma;
|
||||
void *buf;
|
||||
size_t size;
|
||||
enum dma_data_direction direction;
|
||||
};
|
||||
|
||||
#endif /* IB_SRP_H */
|
||||
|
|
@ -0,0 +1,226 @@
|
|||
/*
|
||||
* Copyright (c) 2005 Cisco Systems. All rights reserved.
|
||||
*
|
||||
* This software is available to you under a choice of one of two
|
||||
* licenses. You may choose to be licensed under the terms of the GNU
|
||||
* General Public License (GPL) Version 2, available from the file
|
||||
* COPYING in the main directory of this source tree, or the
|
||||
* OpenIB.org BSD license below:
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or
|
||||
* without modification, are permitted provided that the following
|
||||
* conditions are met:
|
||||
*
|
||||
* - Redistributions of source code must retain the above
|
||||
* copyright notice, this list of conditions and the following
|
||||
* disclaimer.
|
||||
*
|
||||
* - Redistributions in binary form must reproduce the above
|
||||
* copyright notice, this list of conditions and the following
|
||||
* disclaimer in the documentation and/or other materials
|
||||
* provided with the distribution.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||||
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||||
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*
|
||||
* $Id$
|
||||
*/
|
||||
|
||||
#ifndef SCSI_SRP_H
|
||||
#define SCSI_SRP_H
|
||||
|
||||
/*
|
||||
* Structures and constants for the SCSI RDMA Protocol (SRP) as
|
||||
* defined by the INCITS T10 committee. This file was written using
|
||||
* draft Revision 16a of the SRP standard.
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
enum {
|
||||
SRP_LOGIN_REQ = 0x00,
|
||||
SRP_TSK_MGMT = 0x01,
|
||||
SRP_CMD = 0x02,
|
||||
SRP_I_LOGOUT = 0x03,
|
||||
SRP_LOGIN_RSP = 0xc0,
|
||||
SRP_RSP = 0xc1,
|
||||
SRP_LOGIN_REJ = 0xc2,
|
||||
SRP_T_LOGOUT = 0x80,
|
||||
SRP_CRED_REQ = 0x81,
|
||||
SRP_AER_REQ = 0x82,
|
||||
SRP_CRED_RSP = 0x41,
|
||||
SRP_AER_RSP = 0x42
|
||||
};
|
||||
|
||||
enum {
|
||||
SRP_BUF_FORMAT_DIRECT = 1 << 1,
|
||||
SRP_BUF_FORMAT_INDIRECT = 1 << 2
|
||||
};
|
||||
|
||||
enum {
|
||||
SRP_NO_DATA_DESC = 0,
|
||||
SRP_DATA_DESC_DIRECT = 1,
|
||||
SRP_DATA_DESC_INDIRECT = 2
|
||||
};
|
||||
|
||||
enum {
|
||||
SRP_TSK_ABORT_TASK = 0x01,
|
||||
SRP_TSK_ABORT_TASK_SET = 0x02,
|
||||
SRP_TSK_CLEAR_TASK_SET = 0x04,
|
||||
SRP_TSK_LUN_RESET = 0x08,
|
||||
SRP_TSK_CLEAR_ACA = 0x40
|
||||
};
|
||||
|
||||
enum srp_login_rej_reason {
|
||||
SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
|
||||
SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
|
||||
SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
|
||||
SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
|
||||
SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
|
||||
SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
|
||||
SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
|
||||
};
|
||||
|
||||
struct srp_direct_buf {
|
||||
__be64 va;
|
||||
__be32 key;
|
||||
__be32 len;
|
||||
};
|
||||
|
||||
/*
|
||||
* We need the packed attribute because the SRP spec puts the list of
|
||||
* descriptors at an offset of 20, which is not aligned to the size
|
||||
* of struct srp_direct_buf.
|
||||
*/
|
||||
struct srp_indirect_buf {
|
||||
struct srp_direct_buf table_desc;
|
||||
__be32 len;
|
||||
struct srp_direct_buf desc_list[0] __attribute__((packed));
|
||||
};
|
||||
|
||||
enum {
|
||||
SRP_MULTICHAN_SINGLE = 0,
|
||||
SRP_MULTICHAN_MULTI = 1
|
||||
};
|
||||
|
||||
struct srp_login_req {
|
||||
u8 opcode;
|
||||
u8 reserved1[7];
|
||||
u64 tag;
|
||||
__be32 req_it_iu_len;
|
||||
u8 reserved2[4];
|
||||
__be16 req_buf_fmt;
|
||||
u8 req_flags;
|
||||
u8 reserved3[5];
|
||||
u8 initiator_port_id[16];
|
||||
u8 target_port_id[16];
|
||||
};
|
||||
|
||||
struct srp_login_rsp {
|
||||
u8 opcode;
|
||||
u8 reserved1[3];
|
||||
__be32 req_lim_delta;
|
||||
u64 tag;
|
||||
__be32 max_it_iu_len;
|
||||
__be32 max_ti_iu_len;
|
||||
__be16 buf_fmt;
|
||||
u8 rsp_flags;
|
||||
u8 reserved2[25];
|
||||
};
|
||||
|
||||
struct srp_login_rej {
|
||||
u8 opcode;
|
||||
u8 reserved1[3];
|
||||
__be32 reason;
|
||||
u64 tag;
|
||||
u8 reserved2[8];
|
||||
__be16 buf_fmt;
|
||||
u8 reserved3[6];
|
||||
};
|
||||
|
||||
struct srp_i_logout {
|
||||
u8 opcode;
|
||||
u8 reserved[7];
|
||||
u64 tag;
|
||||
};
|
||||
|
||||
struct srp_t_logout {
|
||||
u8 opcode;
|
||||
u8 sol_not;
|
||||
u8 reserved[2];
|
||||
__be32 reason;
|
||||
u64 tag;
|
||||
};
|
||||
|
||||
/*
|
||||
* We need the packed attribute because the SRP spec only aligns the
|
||||
* 8-byte LUN field to 4 bytes.
|
||||
*/
|
||||
struct srp_tsk_mgmt {
|
||||
u8 opcode;
|
||||
u8 sol_not;
|
||||
u8 reserved1[6];
|
||||
u64 tag;
|
||||
u8 reserved2[4];
|
||||
__be64 lun __attribute__((packed));
|
||||
u8 reserved3[2];
|
||||
u8 tsk_mgmt_func;
|
||||
u8 reserved4;
|
||||
u64 task_tag;
|
||||
u8 reserved5[8];
|
||||
};
|
||||
|
||||
/*
|
||||
* We need the packed attribute because the SRP spec only aligns the
|
||||
* 8-byte LUN field to 4 bytes.
|
||||
*/
|
||||
struct srp_cmd {
|
||||
u8 opcode;
|
||||
u8 sol_not;
|
||||
u8 reserved1[3];
|
||||
u8 buf_fmt;
|
||||
u8 data_out_desc_cnt;
|
||||
u8 data_in_desc_cnt;
|
||||
u64 tag;
|
||||
u8 reserved2[4];
|
||||
__be64 lun __attribute__((packed));
|
||||
u8 reserved3;
|
||||
u8 task_attr;
|
||||
u8 reserved4;
|
||||
u8 add_cdb_len;
|
||||
u8 cdb[16];
|
||||
u8 add_data[0];
|
||||
};
|
||||
|
||||
enum {
|
||||
SRP_RSP_FLAG_RSPVALID = 1 << 0,
|
||||
SRP_RSP_FLAG_SNSVALID = 1 << 1,
|
||||
SRP_RSP_FLAG_DOOVER = 1 << 2,
|
||||
SRP_RSP_FLAG_DOUNDER = 1 << 3,
|
||||
SRP_RSP_FLAG_DIOVER = 1 << 4,
|
||||
SRP_RSP_FLAG_DIUNDER = 1 << 5
|
||||
};
|
||||
|
||||
struct srp_rsp {
|
||||
u8 opcode;
|
||||
u8 sol_not;
|
||||
u8 reserved1[2];
|
||||
__be32 req_lim_delta;
|
||||
u64 tag;
|
||||
u8 reserved2[2];
|
||||
u8 flags;
|
||||
u8 status;
|
||||
__be32 data_out_res_cnt;
|
||||
__be32 data_in_res_cnt;
|
||||
__be32 sense_data_len;
|
||||
__be32 resp_data_len;
|
||||
u8 data[0];
|
||||
};
|
||||
|
||||
#endif /* SCSI_SRP_H */
|
||||
Loading…
Reference in New Issue