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e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
322 lines
8.6 KiB
C
322 lines
8.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* FC Transport BSG Interface
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*
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* Copyright (C) 2008 James Smart, Emulex Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef SCSI_BSG_FC_H
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#define SCSI_BSG_FC_H
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/*
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* This file intended to be included by both kernel and user space
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*/
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/*
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* FC Transport SGIO v4 BSG Message Support
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*/
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/* Default BSG request timeout (in seconds) */
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#define FC_DEFAULT_BSG_TIMEOUT (10 * HZ)
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/*
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* Request Message Codes supported by the FC Transport
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*/
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/* define the class masks for the message codes */
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#define FC_BSG_CLS_MASK 0xF0000000 /* find object class */
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#define FC_BSG_HST_MASK 0x80000000 /* fc host class */
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#define FC_BSG_RPT_MASK 0x40000000 /* fc rport class */
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/* fc_host Message Codes */
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#define FC_BSG_HST_ADD_RPORT (FC_BSG_HST_MASK | 0x00000001)
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#define FC_BSG_HST_DEL_RPORT (FC_BSG_HST_MASK | 0x00000002)
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#define FC_BSG_HST_ELS_NOLOGIN (FC_BSG_HST_MASK | 0x00000003)
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#define FC_BSG_HST_CT (FC_BSG_HST_MASK | 0x00000004)
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#define FC_BSG_HST_VENDOR (FC_BSG_HST_MASK | 0x000000FF)
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/* fc_rport Message Codes */
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#define FC_BSG_RPT_ELS (FC_BSG_RPT_MASK | 0x00000001)
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#define FC_BSG_RPT_CT (FC_BSG_RPT_MASK | 0x00000002)
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/*
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* FC Address Identifiers in Message Structures :
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*
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* Whenever a command payload contains a FC Address Identifier
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* (aka port_id), the value is effectively in big-endian
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* order, thus the array elements are decoded as follows:
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* element [0] is bits 23:16 of the FC Address Identifier
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* element [1] is bits 15:8 of the FC Address Identifier
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* element [2] is bits 7:0 of the FC Address Identifier
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*/
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/*
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* FC Host Messages
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*/
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/* FC_BSG_HST_ADDR_PORT : */
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/* Request:
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* This message requests the FC host to login to the remote port
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* at the specified N_Port_Id. The remote port is to be enumerated
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* with the transport upon completion of the login.
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*/
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struct fc_bsg_host_add_rport {
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uint8_t reserved;
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/* FC Address Identier of the remote port to login to */
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uint8_t port_id[3];
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};
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/* Response:
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* There is no additional response data - fc_bsg_reply->result is sufficient
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*/
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/* FC_BSG_HST_DEL_RPORT : */
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/* Request:
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* This message requests the FC host to remove an enumerated
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* remote port and to terminate the login to it.
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*
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* Note: The driver is free to reject this request if it desires to
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* remain logged in with the remote port.
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*/
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struct fc_bsg_host_del_rport {
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uint8_t reserved;
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/* FC Address Identier of the remote port to logout of */
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uint8_t port_id[3];
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};
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/* Response:
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* There is no additional response data - fc_bsg_reply->result is sufficient
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*/
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/* FC_BSG_HST_ELS_NOLOGIN : */
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/* Request:
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* This message requests the FC_Host to send an ELS to a specific
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* N_Port_ID. The host does not need to log into the remote port,
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* nor does it need to enumerate the rport for further traffic
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* (although, the FC host is free to do so if it desires).
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*/
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struct fc_bsg_host_els {
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/*
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* ELS Command Code being sent (must be the same as byte 0
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* of the payload)
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*/
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uint8_t command_code;
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/* FC Address Identier of the remote port to send the ELS to */
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uint8_t port_id[3];
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};
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/* Response:
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*/
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/* fc_bsg_ctels_reply->status values */
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#define FC_CTELS_STATUS_OK 0x00000000
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#define FC_CTELS_STATUS_REJECT 0x00000001
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#define FC_CTELS_STATUS_P_RJT 0x00000002
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#define FC_CTELS_STATUS_F_RJT 0x00000003
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#define FC_CTELS_STATUS_P_BSY 0x00000004
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#define FC_CTELS_STATUS_F_BSY 0x00000006
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struct fc_bsg_ctels_reply {
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/*
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* Note: An ELS LS_RJT may be reported in 2 ways:
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* a) A status of FC_CTELS_STATUS_OK is returned. The caller
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* is to look into the ELS receive payload to determine
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* LS_ACC or LS_RJT (by contents of word 0). The reject
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* data will be in word 1.
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* b) A status of FC_CTELS_STATUS_REJECT is returned, The
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* rjt_data field will contain valid data.
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*
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* Note: ELS LS_ACC is determined by an FC_CTELS_STATUS_OK, and
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* the receive payload word 0 indicates LS_ACC
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* (e.g. value is 0x02xxxxxx).
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*
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* Note: Similarly, a CT Reject may be reported in 2 ways:
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* a) A status of FC_CTELS_STATUS_OK is returned. The caller
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* is to look into the CT receive payload to determine
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* Accept or Reject (by contents of word 2). The reject
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* data will be in word 3.
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* b) A status of FC_CTELS_STATUS_REJECT is returned, The
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* rjt_data field will contain valid data.
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*
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* Note: x_RJT/BSY status will indicae that the rjt_data field
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* is valid and contains the reason/explanation values.
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*/
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uint32_t status; /* See FC_CTELS_STATUS_xxx */
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/* valid if status is not FC_CTELS_STATUS_OK */
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struct {
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uint8_t action; /* fragment_id for CT REJECT */
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uint8_t reason_code;
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uint8_t reason_explanation;
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uint8_t vendor_unique;
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} rjt_data;
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};
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/* FC_BSG_HST_CT : */
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/* Request:
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* This message requests that a CT Request be performed with the
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* indicated N_Port_ID. The driver is responsible for logging in with
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* the fabric and/or N_Port_ID, etc as per FC rules. This request does
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* not mandate that the driver must enumerate the destination in the
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* transport. The driver is allowed to decide whether to enumerate it,
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* and whether to tear it down after the request.
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*/
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struct fc_bsg_host_ct {
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uint8_t reserved;
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/* FC Address Identier of the remote port to send the ELS to */
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uint8_t port_id[3];
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/*
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* We need words 0-2 of the generic preamble for the LLD's
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*/
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uint32_t preamble_word0; /* revision & IN_ID */
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uint32_t preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
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uint32_t preamble_word2; /* Cmd Code, Max Size */
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};
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/* Response:
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*
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* The reply structure is an fc_bsg_ctels_reply structure
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*/
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/* FC_BSG_HST_VENDOR : */
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/* Request:
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* Note: When specifying vendor_id, be sure to read the Vendor Type and ID
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* formatting requirements specified in scsi_netlink.h
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*/
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struct fc_bsg_host_vendor {
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/*
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* Identifies the vendor that the message is formatted for. This
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* should be the recipient of the message.
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*/
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uint64_t vendor_id;
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/* start of vendor command area */
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uint32_t vendor_cmd[0];
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};
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/* Response:
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*/
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struct fc_bsg_host_vendor_reply {
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/* start of vendor response area */
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uint32_t vendor_rsp[0];
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};
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/*
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* FC Remote Port Messages
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*/
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/* FC_BSG_RPT_ELS : */
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/* Request:
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* This message requests that an ELS be performed with the rport.
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*/
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struct fc_bsg_rport_els {
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/*
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* ELS Command Code being sent (must be the same as
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* byte 0 of the payload)
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*/
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uint8_t els_code;
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};
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/* Response:
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*
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* The reply structure is an fc_bsg_ctels_reply structure
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*/
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/* FC_BSG_RPT_CT : */
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/* Request:
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* This message requests that a CT Request be performed with the rport.
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*/
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struct fc_bsg_rport_ct {
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/*
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* We need words 0-2 of the generic preamble for the LLD's
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*/
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uint32_t preamble_word0; /* revision & IN_ID */
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uint32_t preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
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uint32_t preamble_word2; /* Cmd Code, Max Size */
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};
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/* Response:
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*
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* The reply structure is an fc_bsg_ctels_reply structure
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*/
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/* request (CDB) structure of the sg_io_v4 */
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struct fc_bsg_request {
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uint32_t msgcode;
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union {
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struct fc_bsg_host_add_rport h_addrport;
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struct fc_bsg_host_del_rport h_delrport;
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struct fc_bsg_host_els h_els;
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struct fc_bsg_host_ct h_ct;
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struct fc_bsg_host_vendor h_vendor;
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struct fc_bsg_rport_els r_els;
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struct fc_bsg_rport_ct r_ct;
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} rqst_data;
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} __attribute__((packed));
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/* response (request sense data) structure of the sg_io_v4 */
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struct fc_bsg_reply {
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/*
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* The completion result. Result exists in two forms:
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* if negative, it is an -Exxx system errno value. There will
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* be no further reply information supplied.
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* else, it's the 4-byte scsi error result, with driver, host,
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* msg and status fields. The per-msgcode reply structure
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* will contain valid data.
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*/
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uint32_t result;
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/* If there was reply_payload, how much was recevied ? */
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uint32_t reply_payload_rcv_len;
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union {
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struct fc_bsg_host_vendor_reply vendor_reply;
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struct fc_bsg_ctels_reply ctels_reply;
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} reply_data;
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};
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#endif /* SCSI_BSG_FC_H */
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