6f9dbc0e6e
The Command Reference Number (CRN) is part of the FC-Tape features that we enable when talking to tape drives. It starts at 1, and goes to 255 and wraps around to 1. There are a number of reset type conditions that result in the CRN getting reset to 1. These are detailed in section 4.10 (table 8) of the FCP-4r02b specification. One of the conditions is when a PRLI (Process Login) is sent by the initiator, and the Establish Image Pair bit is set in Word 0 of the PRLI. Previously, the isp(4) driver core sent a notification via isp_async() that the target had changed or stayed in place, but there was no indication of whether a PRLI was sent and whether the Establish Image Pair bit was set. The result of this was that in some situations, notably switching back and forth between a direct connection and a switch connection to a tape drive, the isp(4) driver would fail to reset the CRN in situations that require it according to the spec. When the CRN isn't reset in a situation that requires it, the tape drive then rejects every subsequent command that is sent to the drive. It is assuming that the commands are being sent out of order. So, modify the isp(4) driver to include Word 0 of the PRLI command when it sends isp_async() notifications of target changes. Look at the Establish Image Pair bit, and reset the CRN if that bit is set. With this change, I am able to switch a tape drive back and forth between a direct connection and a switch connection, and the isp(4) driver resets the CRN when it should. sys/dev/isp_stds.h: Add bit definitions for PRLI Word 0. sys/dev/ispmbox.h: Add PRLI Word 0 to the port database type, isp_pdb_t. sys/dev/ispvar.h Add PRLI Word 0 to fcportdb_t. sys/dev/isp.c: Populate the new prli_word0 parameter in the port database. In isp_pdb_add_update(), add a check to see if the Establish Image Pair bit is set in PRLI Word 0. If it is, then that is an additional reason to create a change notification. sys/dev/isp_freebsd.c: In isp_async(), if the device changed or stayed, look at PRLI Word 0 to see if the Establish Image Pair bit is set. If it is, reset the CRN if we haven't already. MFC after: 1 week Sponsored by: Spectra Logic Differential Revision: https://reviews.freebsd.org/D19472
341 lines
8.7 KiB
C
341 lines
8.7 KiB
C
/* $FreeBSD$ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1997-2009 by Matthew Jacob
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* Structures that derive directly from public standards.
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*/
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#ifndef _ISP_STDS_H
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#define _ISP_STDS_H
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/*
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* FC Frame Header
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*
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* Source: dpANS-X3.xxx-199x, section 18 (AKA FC-PH-2)
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*
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*/
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typedef struct {
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uint8_t r_ctl;
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uint8_t d_id[3];
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uint8_t cs_ctl;
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uint8_t s_id[3];
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uint8_t type;
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uint8_t f_ctl[3];
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uint8_t seq_id;
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uint8_t df_ctl;
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uint16_t seq_cnt;
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uint16_t ox_id;
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uint16_t rx_id;
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uint32_t parameter;
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} fc_hdr_t;
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/*
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* FCP_CMND_IU Payload
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*
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* Source: NICTS T10, Project 1144D, Revision 07a, Section 9 (AKA fcp2-r07a)
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*
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* Notes:
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* When additional cdb length is defined in fcp_cmnd_alen_datadir,
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* bits 2..7, the actual cdb length is 16 + ((fcp_cmnd_alen_datadir>>2)*4),
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* with the datalength following in MSB format just after.
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*/
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typedef struct {
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uint8_t fcp_cmnd_lun[8];
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uint8_t fcp_cmnd_crn;
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uint8_t fcp_cmnd_task_attribute;
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uint8_t fcp_cmnd_task_management;
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uint8_t fcp_cmnd_alen_datadir;
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union {
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struct {
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uint8_t fcp_cmnd_cdb[16];
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uint32_t fcp_cmnd_dl;
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} sf;
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struct {
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uint8_t fcp_cmnd_cdb[1];
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} lf;
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} cdb_dl;
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} fcp_cmnd_iu_t;
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#define FCP_CMND_TASK_ATTR_SIMPLE 0x00
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#define FCP_CMND_TASK_ATTR_HEAD 0x01
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#define FCP_CMND_TASK_ATTR_ORDERED 0x02
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#define FCP_CMND_TASK_ATTR_ACA 0x04
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#define FCP_CMND_TASK_ATTR_UNTAGGED 0x05
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#define FCP_CMND_TASK_ATTR_MASK 0x07
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#define FCP_CMND_ADDTL_CDBLEN_SHIFT 2
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#define FCP_CMND_DATA_WRITE 0x01
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#define FCP_CMND_DATA_READ 0x02
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#define FCP_CMND_DATA_DIR_MASK 0x03
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#define FCP_CMND_TMF_CLEAR_ACA 0x40
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#define FCP_CMND_TMF_TGT_RESET 0x20
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#define FCP_CMND_TMF_LUN_RESET 0x10
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#define FCP_CMND_TMF_QUERY_ASYNC_EVENT 0x08
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#define FCP_CMND_TMF_CLEAR_TASK_SET 0x04
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#define FCP_CMND_TMF_ABORT_TASK_SET 0x02
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#define FCP_CMND_TMF_QUERY_TASK_SET 0x01
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/*
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* Basic CT IU Header
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*
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* Source: X3.288-199x Generic Services 2 Rev 5.3 (FC-GS-2) Section 4.3.1
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*/
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typedef struct {
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uint8_t ct_revision;
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uint8_t ct_in_id[3];
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uint8_t ct_fcs_type;
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uint8_t ct_fcs_subtype;
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uint8_t ct_options;
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uint8_t ct_reserved0;
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uint16_t ct_cmd_resp;
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uint16_t ct_bcnt_resid;
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uint8_t ct_reserved1;
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uint8_t ct_reason;
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uint8_t ct_explanation;
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uint8_t ct_vunique;
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} ct_hdr_t;
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#define CT_REVISION 1
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#define CT_FC_TYPE_FC 0xFC
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#define CT_FC_SUBTYPE_NS 0x02
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/*
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* RFT_ID Requet CT_IU
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*
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* Source: NCITS xxx-200x Generic Services- 5 Rev 8.5 Section 5.2.5.30
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*/
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typedef struct {
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ct_hdr_t rftid_hdr;
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uint8_t rftid_reserved;
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uint8_t rftid_portid[3];
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uint32_t rftid_fc4types[8];
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} rft_id_t;
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/*
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* RSPN_ID Requet CT_IU
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*
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* Source: INCITS 463-2010 Generic Services 6 Section 5.2.5.32
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*/
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typedef struct {
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ct_hdr_t rspnid_hdr;
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uint8_t rspnid_reserved;
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uint8_t rspnid_portid[3];
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uint8_t rspnid_length;
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uint8_t rspnid_name[0];
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} rspn_id_t;
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/*
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* RFF_ID Requet CT_IU
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*
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* Source: INCITS 463-2010 Generic Services 6 Section 5.2.5.34
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*/
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typedef struct {
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ct_hdr_t rffid_hdr;
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uint8_t rffid_reserved;
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uint8_t rffid_portid[3];
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uint16_t rffid_reserved2;
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uint8_t rffid_fc4features;
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uint8_t rffid_fc4type;
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} rff_id_t;
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/*
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* RSNN_NN Requet CT_IU
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*
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* Source: INCITS 463-2010 Generic Services 6 Section 5.2.5.35
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*/
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typedef struct {
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ct_hdr_t rsnnnn_hdr;
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uint8_t rsnnnn_nodename[8];
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uint8_t rsnnnn_length;
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uint8_t rsnnnn_name[0];
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} rsnn_nn_t;
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/*
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* FCP Response IU and bits of interest
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* Source: NCITS T10, Project 1828D, Revision 02b (aka FCP4r02b)
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*/
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typedef struct {
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uint8_t fcp_rsp_reserved[8];
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uint16_t fcp_rsp_status_qualifier; /* SAM-5 Status Qualifier */
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uint8_t fcp_rsp_bits;
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uint8_t fcp_rsp_scsi_status; /* SAM-5 SCSI Status Byte */
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uint32_t fcp_rsp_resid;
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uint32_t fcp_rsp_snslen;
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uint32_t fcp_rsp_rsplen;
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/*
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* In the bytes that follow, it's going to be
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* FCP RESPONSE INFO (max 8 bytes, possibly 0)
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* FCP SENSE INFO (if any)
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* FCP BIDIRECTIONAL READ RESID (if any)
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*/
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uint8_t fcp_rsp_extra[0];
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} fcp_rsp_iu_t;
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#define MIN_FCP_RESPONSE_SIZE 24
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#define FCP_BIDIR_RSP 0x80 /* Bi-Directional response */
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#define FCP_BIDIR_RESID_UNDERFLOW 0x40
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#define FCP_BIDIR_RESID_OVERFLOW 0x20
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#define FCP_CONF_REQ 0x10
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#define FCP_RESID_UNDERFLOW 0x08
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#define FCP_RESID_OVERFLOW 0x04
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#define FCP_SNSLEN_VALID 0x02
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#define FCP_RSPLEN_VALID 0x01
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#define FCP_MAX_RSPLEN 0x08
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/*
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* FCP Response Code Definitions
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* Source: NCITS T10, Project 1144D, Revision 08 (aka FCP2r08)
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*/
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#define FCP_RSPNS_CODE_OFFSET 3
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#define FCP_RSPNS_TMF_DONE 0
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#define FCP_RSPNS_DLBRSTX 1
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#define FCP_RSPNS_BADCMND 2
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#define FCP_RSPNS_EROFS 3
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#define FCP_RSPNS_TMF_REJECT 4
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#define FCP_RSPNS_TMF_FAILED 5
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#define FCP_RSPNS_TMF_SUCCEEDED 8
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#define FCP_RSPNS_TMF_INCORRECT_LUN 9
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/*
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* R_CTL field definitions
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*
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* Bits 31-28 are ROUTING
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* Bits 27-24 are INFORMATION
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*
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* These are nibble values, not bits
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*/
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#define R_CTL_ROUTE_DATA 0x00
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#define R_CTL_ROUTE_ELS 0x02
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#define R_CTL_ROUTE_FC4_LINK 0x03
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#define R_CTL_ROUTE_VDATA 0x04
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#define R_CTL_ROUTE_EXENDED 0x05
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#define R_CTL_ROUTE_BASIC 0x08
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#define R_CTL_ROUTE_LINK 0x0c
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#define R_CTL_ROUTE_EXT_ROUTING 0x0f
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#define R_CTL_INFO_UNCATEGORIZED 0x00
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#define R_CTL_INFO_SOLICITED_DATA 0x01
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#define R_CTL_INFO_UNSOLICITED_CONTROL 0x02
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#define R_CTL_INFO_SOLICITED_CONTROL 0x03
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#define R_CTL_INFO_UNSOLICITED_DATA 0x04
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#define R_CTL_INFO_DATA_DESCRIPTOR 0x05
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#define R_CTL_INFO_UNSOLICITED_COMMAND 0x06
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#define R_CTL_INFO_COMMAND_STATUS 0x07
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#define MAKE_RCTL(a, b) (((a) << 4) | (b))
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/* unconverted miscellany */
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/*
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* Basic FC Link Service defines
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*/
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/* #define ABTS MAKE_RCTL(R_CTL_ROUTE_BASIC, R_CTL_INFO_SOLICITED_DATA) */
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#define BA_ACC MAKE_RCTL(R_CTL_ROUTE_BASIC, R_CTL_INFO_UNSOLICITED_DATA) /* of ABORT */
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#define BA_RJT MAKE_RCTL(R_CTL_ROUTE_BASIC, R_CTL_INFO_DATA_DESCRIPTOR) /* of ABORT */
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/*
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* Link Service Accept/Reject
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*/
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#define LS_ACC 0x8002
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#define LS_RJT 0x8001
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/*
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* FC ELS Codes- bits 31-24 of the first payload word of an ELS frame.
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*/
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#define PLOGI 0x03
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#define FLOGI 0x04
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#define LOGO 0x05
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#define ABTX 0x06
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#define PRLI 0x20
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#define PRLO 0x21
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#define SCN 0x22
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#define TPRLO 0x24
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#define PDISC 0x50
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#define ADISC 0x52
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#define RNC 0x53
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/*
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* PRLI Word 0 definitions
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* FPC4-r02b January, 2011
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*/
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#define PRLI_WD0_TYPE_MASK 0xff000000
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#define PRLI_WD0_TC_EXT_MASK 0x00ff0000
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#define PRLI_WD0_EST_IMAGE_PAIR (1 << 13)
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/*
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* PRLI Word 3 definitions
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* FPC4-r02b January, 2011
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*/
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#define PRLI_WD3_ENHANCED_DISCOVERY (1 << 11)
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#define PRLI_WD3_REC_SUPPORT (1 << 10)
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#define PRLI_WD3_TASK_RETRY_IDENTIFICATION_REQUESTED (1 << 9)
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#define PRLI_WD3_RETRY (1 << 8)
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#define PRLI_WD3_CONFIRMED_COMPLETION_ALLOWED (1 << 7)
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#define PRLI_WD3_DATA_OVERLAY_ALLOWED (1 << 6)
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#define PRLI_WD3_INITIATOR_FUNCTION (1 << 5)
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#define PRLI_WD3_TARGET_FUNCTION (1 << 4)
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#define PRLI_WD3_READ_FCP_XFER_RDY_DISABLED (1 << 1) /* definitely supposed to be set */
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#define PRLI_WD3_WRITE_FCP_XFER_RDY_DISABLED (1 << 0)
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/*
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* FC4 defines
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*/
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#define FC4_IP 5 /* ISO/EEC 8802-2 LLC/SNAP */
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#define FC4_SCSI 8 /* SCSI-3 via Fibre Channel Protocol (FCP) */
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#define FC4_FC_SVC 0x20 /* Fibre Channel Services */
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#ifndef MSG_ABORT
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#define MSG_ABORT 0x06
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#endif
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#ifndef MSG_BUS_DEV_RESET
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#define MSG_BUS_DEV_RESET 0x0c
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#endif
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#ifndef MSG_ABORT_TAG
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#define MSG_ABORT_TAG 0x0d
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#endif
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#ifndef MSG_CLEAR_QUEUE
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#define MSG_CLEAR_QUEUE 0x0e
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#endif
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#ifndef MSG_REL_RECOVERY
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#define MSG_REL_RECOVERY 0x10
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#endif
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#ifndef MSG_TERM_IO_PROC
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#define MSG_TERM_IO_PROC 0x11
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#endif
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#ifndef MSG_LUN_RESET
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#define MSG_LUN_RESET 0x17
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#endif
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#endif /* _ISP_STDS_H */
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