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

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