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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-04 20:04:37 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-04 20:04:37 -0400 |
commit | fdf1f7ff1bd7f1c6d1d5dc2b29b6b11a4f722276 (patch) | |
tree | 3608d840304d28ab26d7698631fa0a1000966a0c /include/scsi | |
parent | a71e36045e1fd5813addad2fce878d96e2827d66 (diff) | |
parent | 291e3e51a34d2f546608bfd31f185151621135b7 (diff) | |
download | linux-fdf1f7ff1bd7f1c6d1d5dc2b29b6b11a4f722276.tar.gz linux-fdf1f7ff1bd7f1c6d1d5dc2b29b6b11a4f722276.tar.bz2 linux-fdf1f7ff1bd7f1c6d1d5dc2b29b6b11a4f722276.zip |
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
"The most notable item is IBM virtual SCSI target driver, that was
originally ported to target-core back in 2010 by Tomo-san, and has
been brought forward to v4.x code by Bryant Ly, Michael Cyr and co
over the last months.
Also included are two ORDERED task related bug-fixes Bryant + Michael
found along the way using ibmvscsis with AIX guests, plus a few
miscellaneous target-core + iscsi-target bug-fixes with associated
stable tags"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
target: fix spelling mistake: "limitiation" -> "limitation"
target: Fix residual overflow handling in target_complete_cmd_with_length
tcm_fc: set and unset FCP_SPPF_TARG_FCN
iscsi-target: Fix panic when adding second TCP connection to iSCSI session
ibmvscsis: Initial commit of IBM VSCSI Tgt Driver
target: Fix ordered task CHECK_CONDITION early exception handling
target: Fix ordered task target_setup_cmd_from_cdb exception hang
target: Fix max_unmap_lba_count calc overflow
target: Fix race between iscsi-target connection shutdown + ABORT_TASK
target: Fix missing complete during ABORT_TASK + CMD_T_FABRIC_STOP
Diffstat (limited to 'include/scsi')
-rw-r--r-- | include/scsi/viosrp.h | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/include/scsi/viosrp.h b/include/scsi/viosrp.h new file mode 100644 index 000000000000..974e07bd8e59 --- /dev/null +++ b/include/scsi/viosrp.h @@ -0,0 +1,220 @@ +/*****************************************************************************/ +/* srp.h -- SCSI RDMA Protocol definitions */ +/* */ +/* Written By: Colin Devilbis, IBM Corporation */ +/* */ +/* Copyright (C) 2003 IBM Corporation */ +/* */ +/* This program is free software; you can redistribute it and/or modify */ +/* it under the terms of the GNU General Public License as published by */ +/* the Free Software Foundation; either version 2 of the License, or */ +/* (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* This file contains structures and definitions for IBM RPA (RS/6000 */ +/* platform architecture) implementation of the SRP (SCSI RDMA Protocol) */ +/* standard. SRP is used on IBM iSeries and pSeries platforms to send SCSI */ +/* commands between logical partitions. */ +/* */ +/* SRP Information Units (IUs) are sent on a "Command/Response Queue" (CRQ) */ +/* between partitions. The definitions in this file are architected, */ +/* and cannot be changed without breaking compatibility with other versions */ +/* of Linux and other operating systems (AIX, OS/400) that talk this protocol*/ +/* between logical partitions */ +/*****************************************************************************/ +#ifndef VIOSRP_H +#define VIOSRP_H +#include <scsi/srp.h> + +#define SRP_VERSION "16.a" +#define SRP_MAX_IU_LEN 256 +#define SRP_MAX_LOC_LEN 32 + +union srp_iu { + struct srp_login_req login_req; + struct srp_login_rsp login_rsp; + struct srp_login_rej login_rej; + struct srp_i_logout i_logout; + struct srp_t_logout t_logout; + struct srp_tsk_mgmt tsk_mgmt; + struct srp_cmd cmd; + struct srp_rsp rsp; + u8 reserved[SRP_MAX_IU_LEN]; +}; + +enum viosrp_crq_headers { + VIOSRP_CRQ_FREE = 0x00, + VIOSRP_CRQ_CMD_RSP = 0x80, + VIOSRP_CRQ_INIT_RSP = 0xC0, + VIOSRP_CRQ_XPORT_EVENT = 0xFF +}; + +enum viosrp_crq_init_formats { + VIOSRP_CRQ_INIT = 0x01, + VIOSRP_CRQ_INIT_COMPLETE = 0x02 +}; + +enum viosrp_crq_formats { + VIOSRP_SRP_FORMAT = 0x01, + VIOSRP_MAD_FORMAT = 0x02, + VIOSRP_OS400_FORMAT = 0x03, + VIOSRP_AIX_FORMAT = 0x04, + VIOSRP_LINUX_FORMAT = 0x05, + VIOSRP_INLINE_FORMAT = 0x06 +}; + +enum viosrp_crq_status { + VIOSRP_OK = 0x0, + VIOSRP_NONRECOVERABLE_ERR = 0x1, + VIOSRP_VIOLATES_MAX_XFER = 0x2, + VIOSRP_PARTNER_PANIC = 0x3, + VIOSRP_DEVICE_BUSY = 0x8, + VIOSRP_ADAPTER_FAIL = 0x10, + VIOSRP_OK2 = 0x99, +}; + +struct viosrp_crq { + u8 valid; /* used by RPA */ + u8 format; /* SCSI vs out-of-band */ + u8 reserved; + u8 status; /* non-scsi failure? (e.g. DMA failure) */ + __be16 timeout; /* in seconds */ + __be16 IU_length; /* in bytes */ + __be64 IU_data_ptr; /* the TCE for transferring data */ +}; + +/* MADs are Management requests above and beyond the IUs defined in the SRP + * standard. + */ +enum viosrp_mad_types { + VIOSRP_EMPTY_IU_TYPE = 0x01, + VIOSRP_ERROR_LOG_TYPE = 0x02, + VIOSRP_ADAPTER_INFO_TYPE = 0x03, + VIOSRP_CAPABILITIES_TYPE = 0x05, + VIOSRP_ENABLE_FAST_FAIL = 0x08, +}; + +enum viosrp_mad_status { + VIOSRP_MAD_SUCCESS = 0x00, + VIOSRP_MAD_NOT_SUPPORTED = 0xF1, + VIOSRP_MAD_FAILED = 0xF7, +}; + +enum viosrp_capability_type { + MIGRATION_CAPABILITIES = 0x01, + RESERVATION_CAPABILITIES = 0x02, +}; + +enum viosrp_capability_support { + SERVER_DOES_NOT_SUPPORTS_CAP = 0x0, + SERVER_SUPPORTS_CAP = 0x01, + SERVER_CAP_DATA = 0x02, +}; + +enum viosrp_reserve_type { + CLIENT_RESERVE_SCSI_2 = 0x01, +}; + +enum viosrp_capability_flag { + CLIENT_MIGRATED = 0x01, + CLIENT_RECONNECT = 0x02, + CAP_LIST_SUPPORTED = 0x04, + CAP_LIST_DATA = 0x08, +}; + +/* + * Common MAD header + */ +struct mad_common { + __be32 type; + __be16 status; + __be16 length; + __be64 tag; +}; + +/* + * All SRP (and MAD) requests normally flow from the + * client to the server. There is no way for the server to send + * an asynchronous message back to the client. The Empty IU is used + * to hang out a meaningless request to the server so that it can respond + * asynchrouously with something like a SCSI AER + */ +struct viosrp_empty_iu { + struct mad_common common; + __be64 buffer; + __be32 port; +}; + +struct viosrp_error_log { + struct mad_common common; + __be64 buffer; +}; + +struct viosrp_adapter_info { + struct mad_common common; + __be64 buffer; +}; + +struct viosrp_fast_fail { + struct mad_common common; +}; + +struct viosrp_capabilities { + struct mad_common common; + __be64 buffer; +}; + +struct mad_capability_common { + __be32 cap_type; + __be16 length; + __be16 server_support; +}; + +struct mad_reserve_cap { + struct mad_capability_common common; + __be32 type; +}; + +struct mad_migration_cap { + struct mad_capability_common common; + __be32 ecl; +}; + +struct capabilities { + __be32 flags; + char name[SRP_MAX_LOC_LEN]; + char loc[SRP_MAX_LOC_LEN]; + struct mad_migration_cap migration; + struct mad_reserve_cap reserve; +}; + +union mad_iu { + struct viosrp_empty_iu empty_iu; + struct viosrp_error_log error_log; + struct viosrp_adapter_info adapter_info; + struct viosrp_fast_fail fast_fail; + struct viosrp_capabilities capabilities; +}; + +union viosrp_iu { + union srp_iu srp; + union mad_iu mad; +}; + +struct mad_adapter_info_data { + char srp_version[8]; + char partition_name[96]; + __be32 partition_number; +#define SRP_MAD_VERSION_1 1 + __be32 mad_version; +#define SRP_MAD_OS_LINUX 2 +#define SRP_MAD_OS_AIX 3 + __be32 os_type; + __be32 port_max_txu[8]; /* per-port maximum transfer */ +}; + +#endif |