1149 lines
35 KiB
C
1149 lines
35 KiB
C
/*
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* This file is part of the zfcp device driver for
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* FCP adapters for IBM System z9 and zSeries.
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*
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* (C) Copyright IBM Corp. 2002, 2006
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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, or (at your option)
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* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef ZFCP_DEF_H
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#define ZFCP_DEF_H
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/*************************** INCLUDES *****************************************/
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <linux/miscdevice.h>
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#include <linux/major.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/mempool.h>
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#include <linux/syscalls.h>
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#include <linux/ioctl.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_fc.h>
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#include <asm/ccwdev.h>
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#include <asm/qdio.h>
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#include <asm/debug.h>
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#include <asm/ebcdic.h>
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#include "zfcp_fsf.h"
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/********************* GENERAL DEFINES *********************************/
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/* zfcp version number, it consists of major, minor, and patch-level number */
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#define ZFCP_VERSION "4.8.0"
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/**
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* zfcp_sg_to_address - determine kernel address from struct scatterlist
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* @list: struct scatterlist
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* Return: kernel address
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*/
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static inline void *
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zfcp_sg_to_address(struct scatterlist *list)
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{
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return (void *) (page_address(list->page) + list->offset);
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}
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/**
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* zfcp_address_to_sg - set up struct scatterlist from kernel address
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* @address: kernel address
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* @list: struct scatterlist
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*/
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static inline void
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zfcp_address_to_sg(void *address, struct scatterlist *list)
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{
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list->page = virt_to_page(address);
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list->offset = ((unsigned long) address) & (PAGE_SIZE - 1);
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}
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#define REQUEST_LIST_SIZE 128
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/********************* SCSI SPECIFIC DEFINES *********************************/
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#define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
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/********************* CIO/QDIO SPECIFIC DEFINES *****************************/
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/* Adapter Identification Parameters */
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#define ZFCP_CONTROL_UNIT_TYPE 0x1731
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#define ZFCP_CONTROL_UNIT_MODEL 0x03
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#define ZFCP_DEVICE_TYPE 0x1732
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#define ZFCP_DEVICE_MODEL 0x03
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#define ZFCP_DEVICE_MODEL_PRIV 0x04
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/* allow as many chained SBALs as are supported by hardware */
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#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ
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#define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ
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#define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ
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/* DMQ bug workaround: don't use last SBALE */
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#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
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/* index of last SBALE (with respect to DMQ bug workaround) */
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#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
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/* max. number of (data buffer) SBALEs in largest SBAL chain */
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#define ZFCP_MAX_SBALES_PER_REQ \
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(ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
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/* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
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#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
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/* max. number of (data buffer) SBALEs in largest SBAL chain
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multiplied with number of sectors per 4k block */
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/* FIXME(tune): free space should be one max. SBAL chain plus what? */
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#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \
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- (ZFCP_MAX_SBALS_PER_REQ + 4))
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#define ZFCP_SBAL_TIMEOUT (5*HZ)
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#define ZFCP_TYPE2_RECOVERY_TIME (8*HZ)
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/* queue polling (values in microseconds) */
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#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */
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#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */
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#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */
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#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */
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#define QDIO_SCSI_QFMT 1 /* 1 for FSF */
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/********************* FSF SPECIFIC DEFINES *********************************/
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#define ZFCP_ULP_INFO_VERSION 26
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#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION
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/* ATTENTION: value must not be used by hardware */
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#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
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#define ZFCP_STATUS_READ_FAILED_THRESHOLD 3
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#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM
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/* Do 1st retry in 1 second, then double the timeout for each following retry */
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#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100
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#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7
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/* timeout value for "default timer" for fsf requests */
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#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
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/*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/
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typedef unsigned long long wwn_t;
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typedef unsigned long long fcp_lun_t;
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/* data length field may be at variable position in FCP-2 FCP_CMND IU */
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typedef unsigned int fcp_dl_t;
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#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3
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/* timeout for name-server lookup (in seconds) */
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#define ZFCP_NS_GID_PN_TIMEOUT 10
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/* largest SCSI command we can process */
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/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */
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#define ZFCP_MAX_SCSI_CMND_LENGTH 255
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/* maximum number of commands in LUN queue (tagged queueing) */
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#define ZFCP_CMND_PER_LUN 32
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/* task attribute values in FCP-2 FCP_CMND IU */
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#define SIMPLE_Q 0
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#define HEAD_OF_Q 1
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#define ORDERED_Q 2
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#define ACA_Q 4
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#define UNTAGGED 5
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/* task management flags in FCP-2 FCP_CMND IU */
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#define FCP_CLEAR_ACA 0x40
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#define FCP_TARGET_RESET 0x20
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#define FCP_LOGICAL_UNIT_RESET 0x10
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#define FCP_CLEAR_TASK_SET 0x04
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#define FCP_ABORT_TASK_SET 0x02
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#define FCP_CDB_LENGTH 16
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#define ZFCP_DID_MASK 0x00FFFFFF
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/* FCP(-2) FCP_CMND IU */
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struct fcp_cmnd_iu {
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fcp_lun_t fcp_lun; /* FCP logical unit number */
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u8 crn; /* command reference number */
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u8 reserved0:5; /* reserved */
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u8 task_attribute:3; /* task attribute */
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u8 task_management_flags; /* task management flags */
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u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */
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u8 rddata:1; /* read data */
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u8 wddata:1; /* write data */
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u8 fcp_cdb[FCP_CDB_LENGTH];
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} __attribute__((packed));
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/* FCP(-2) FCP_RSP IU */
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struct fcp_rsp_iu {
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u8 reserved0[10];
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union {
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struct {
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u8 reserved1:3;
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u8 fcp_conf_req:1;
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u8 fcp_resid_under:1;
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u8 fcp_resid_over:1;
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u8 fcp_sns_len_valid:1;
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u8 fcp_rsp_len_valid:1;
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} bits;
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u8 value;
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} validity;
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u8 scsi_status;
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u32 fcp_resid;
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u32 fcp_sns_len;
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u32 fcp_rsp_len;
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} __attribute__((packed));
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#define RSP_CODE_GOOD 0
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#define RSP_CODE_LENGTH_MISMATCH 1
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#define RSP_CODE_FIELD_INVALID 2
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#define RSP_CODE_RO_MISMATCH 3
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#define RSP_CODE_TASKMAN_UNSUPP 4
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#define RSP_CODE_TASKMAN_FAILED 5
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/* see fc-fs */
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#define LS_RSCN 0x61040000
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#define LS_LOGO 0x05000000
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#define LS_PLOGI 0x03000000
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struct fcp_rscn_head {
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u8 command;
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u8 page_length; /* always 0x04 */
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u16 payload_len;
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} __attribute__((packed));
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struct fcp_rscn_element {
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u8 reserved:2;
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u8 event_qual:4;
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u8 addr_format:2;
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u32 nport_did:24;
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} __attribute__((packed));
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#define ZFCP_PORT_ADDRESS 0x0
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#define ZFCP_AREA_ADDRESS 0x1
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#define ZFCP_DOMAIN_ADDRESS 0x2
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#define ZFCP_FABRIC_ADDRESS 0x3
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#define ZFCP_PORTS_RANGE_PORT 0xFFFFFF
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#define ZFCP_PORTS_RANGE_AREA 0xFFFF00
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#define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000
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#define ZFCP_PORTS_RANGE_FABRIC 0x000000
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#define ZFCP_NO_PORTS_PER_AREA 0x100
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#define ZFCP_NO_PORTS_PER_DOMAIN 0x10000
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#define ZFCP_NO_PORTS_PER_FABRIC 0x1000000
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/* see fc-ph */
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struct fcp_logo {
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u32 command;
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u32 nport_did;
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wwn_t nport_wwpn;
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} __attribute__((packed));
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/*
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* DBF stuff
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*/
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#define ZFCP_DBF_TAG_SIZE 4
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struct zfcp_dbf_dump {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u32 total_size; /* size of total dump data */
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u32 offset; /* how much data has being already dumped */
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u32 size; /* how much data comes with this record */
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u8 data[]; /* dump data */
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} __attribute__ ((packed));
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/* FIXME: to be inflated when reworking the erp dbf */
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struct zfcp_erp_dbf_record {
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u8 dummy[16];
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} __attribute__ ((packed));
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struct zfcp_hba_dbf_record_response {
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u32 fsf_command;
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u64 fsf_reqid;
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u32 fsf_seqno;
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u64 fsf_issued;
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u32 fsf_prot_status;
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u32 fsf_status;
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u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE];
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u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
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u32 fsf_req_status;
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u8 sbal_first;
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u8 sbal_curr;
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u8 sbal_last;
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u8 pool;
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u64 erp_action;
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union {
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struct {
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u64 scsi_cmnd;
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u64 scsi_serial;
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} send_fcp;
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struct {
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u64 wwpn;
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u32 d_id;
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u32 port_handle;
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} port;
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struct {
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u64 wwpn;
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u64 fcp_lun;
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u32 port_handle;
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u32 lun_handle;
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} unit;
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struct {
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u32 d_id;
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u8 ls_code;
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} send_els;
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} data;
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} __attribute__ ((packed));
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struct zfcp_hba_dbf_record_status {
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u8 failed;
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u32 status_type;
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u32 status_subtype;
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struct fsf_queue_designator
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queue_designator;
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u32 payload_size;
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#define ZFCP_DBF_UNSOL_PAYLOAD 80
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#define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32
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#define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56
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#define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32)
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u8 payload[ZFCP_DBF_UNSOL_PAYLOAD];
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} __attribute__ ((packed));
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struct zfcp_hba_dbf_record_qdio {
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u32 status;
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u32 qdio_error;
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u32 siga_error;
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u8 sbal_index;
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u8 sbal_count;
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} __attribute__ ((packed));
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struct zfcp_hba_dbf_record {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u8 tag2[ZFCP_DBF_TAG_SIZE];
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union {
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struct zfcp_hba_dbf_record_response response;
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struct zfcp_hba_dbf_record_status status;
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struct zfcp_hba_dbf_record_qdio qdio;
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} type;
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} __attribute__ ((packed));
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struct zfcp_san_dbf_record_ct {
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union {
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struct {
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u16 cmd_req_code;
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u8 revision;
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u8 gs_type;
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u8 gs_subtype;
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u8 options;
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u16 max_res_size;
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} request;
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struct {
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u16 cmd_rsp_code;
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u8 revision;
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u8 reason_code;
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u8 reason_code_expl;
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u8 vendor_unique;
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} response;
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} type;
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u32 payload_size;
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#define ZFCP_DBF_CT_PAYLOAD 24
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u8 payload[ZFCP_DBF_CT_PAYLOAD];
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} __attribute__ ((packed));
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struct zfcp_san_dbf_record_els {
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u8 ls_code;
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u32 payload_size;
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#define ZFCP_DBF_ELS_PAYLOAD 32
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#define ZFCP_DBF_ELS_MAX_PAYLOAD 1024
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u8 payload[ZFCP_DBF_ELS_PAYLOAD];
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} __attribute__ ((packed));
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struct zfcp_san_dbf_record {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u64 fsf_reqid;
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u32 fsf_seqno;
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u32 s_id;
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u32 d_id;
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union {
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struct zfcp_san_dbf_record_ct ct;
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struct zfcp_san_dbf_record_els els;
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} type;
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} __attribute__ ((packed));
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struct zfcp_scsi_dbf_record {
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u8 tag[ZFCP_DBF_TAG_SIZE];
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u8 tag2[ZFCP_DBF_TAG_SIZE];
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u32 scsi_id;
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u32 scsi_lun;
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u32 scsi_result;
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u64 scsi_cmnd;
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u64 scsi_serial;
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#define ZFCP_DBF_SCSI_OPCODE 16
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u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
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u8 scsi_retries;
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u8 scsi_allowed;
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u64 fsf_reqid;
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u32 fsf_seqno;
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u64 fsf_issued;
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union {
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u64 old_fsf_reqid;
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struct {
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u8 rsp_validity;
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u8 rsp_scsi_status;
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u32 rsp_resid;
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u8 rsp_code;
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#define ZFCP_DBF_SCSI_FCP_SNS_INFO 16
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#define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256
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u32 sns_info_len;
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u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
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} fcp;
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} type;
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} __attribute__ ((packed));
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/*
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* FC-FS stuff
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*/
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#define R_A_TOV 10 /* seconds */
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#define ZFCP_ELS_TIMEOUT (2 * R_A_TOV)
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#define ZFCP_LS_RLS 0x0f
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#define ZFCP_LS_ADISC 0x52
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#define ZFCP_LS_RPS 0x56
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#define ZFCP_LS_RSCN 0x61
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#define ZFCP_LS_RNID 0x78
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struct zfcp_ls_rjt_par {
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u8 action;
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u8 reason_code;
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u8 reason_expl;
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u8 vendor_unique;
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} __attribute__ ((packed));
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struct zfcp_ls_adisc {
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u8 code;
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u8 field[3];
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u32 hard_nport_id;
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u64 wwpn;
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u64 wwnn;
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u32 nport_id;
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} __attribute__ ((packed));
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struct zfcp_ls_adisc_acc {
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u8 code;
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u8 field[3];
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u32 hard_nport_id;
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u64 wwpn;
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u64 wwnn;
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u32 nport_id;
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} __attribute__ ((packed));
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struct zfcp_rc_entry {
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u8 code;
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const char *description;
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};
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/*
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* FC-GS-2 stuff
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*/
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#define ZFCP_CT_REVISION 0x01
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#define ZFCP_CT_DIRECTORY_SERVICE 0xFC
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#define ZFCP_CT_NAME_SERVER 0x02
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#define ZFCP_CT_SYNCHRONOUS 0x00
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#define ZFCP_CT_GID_PN 0x0121
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#define ZFCP_CT_MAX_SIZE 0x1020
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#define ZFCP_CT_ACCEPT 0x8002
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#define ZFCP_CT_REJECT 0x8001
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/*
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* FC-GS-4 stuff
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*/
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#define ZFCP_CT_TIMEOUT (3 * R_A_TOV)
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|
|
/******************** LOGGING MACROS AND DEFINES *****************************/
|
|
|
|
/*
|
|
* Logging may be applied on certain kinds of driver operations
|
|
* independently. Additionally, different log-levels are supported for
|
|
* each of these areas.
|
|
*/
|
|
|
|
#define ZFCP_NAME "zfcp"
|
|
|
|
/* independent log areas */
|
|
#define ZFCP_LOG_AREA_OTHER 0
|
|
#define ZFCP_LOG_AREA_SCSI 1
|
|
#define ZFCP_LOG_AREA_FSF 2
|
|
#define ZFCP_LOG_AREA_CONFIG 3
|
|
#define ZFCP_LOG_AREA_CIO 4
|
|
#define ZFCP_LOG_AREA_QDIO 5
|
|
#define ZFCP_LOG_AREA_ERP 6
|
|
#define ZFCP_LOG_AREA_FC 7
|
|
|
|
/* log level values*/
|
|
#define ZFCP_LOG_LEVEL_NORMAL 0
|
|
#define ZFCP_LOG_LEVEL_INFO 1
|
|
#define ZFCP_LOG_LEVEL_DEBUG 2
|
|
#define ZFCP_LOG_LEVEL_TRACE 3
|
|
|
|
/*
|
|
* this allows removal of logging code by the preprocessor
|
|
* (the most detailed log level still to be compiled in is specified,
|
|
* higher log levels are removed)
|
|
*/
|
|
#define ZFCP_LOG_LEVEL_LIMIT ZFCP_LOG_LEVEL_TRACE
|
|
|
|
/* get "loglevel" nibble assignment */
|
|
#define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \
|
|
((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF)
|
|
|
|
/* set "loglevel" nibble */
|
|
#define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \
|
|
(value << (zfcp_lognibble << 2))
|
|
|
|
/* all log-level defaults are combined to generate initial log-level */
|
|
#define ZFCP_LOG_LEVEL_DEFAULTS \
|
|
(ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \
|
|
ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC))
|
|
|
|
/* check whether we have the right level for logging */
|
|
#define ZFCP_LOG_CHECK(level) \
|
|
((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level)
|
|
|
|
/* logging routine for zfcp */
|
|
#define _ZFCP_LOG(fmt, args...) \
|
|
printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \
|
|
__LINE__ , ##args)
|
|
|
|
#define ZFCP_LOG(level, fmt, args...) \
|
|
do { \
|
|
if (ZFCP_LOG_CHECK(level)) \
|
|
_ZFCP_LOG(fmt, ##args); \
|
|
} while (0)
|
|
|
|
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL
|
|
# define ZFCP_LOG_NORMAL(fmt, args...) do { } while (0)
|
|
#else
|
|
# define ZFCP_LOG_NORMAL(fmt, args...) \
|
|
do { \
|
|
if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \
|
|
printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
|
|
} while (0)
|
|
#endif
|
|
|
|
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO
|
|
# define ZFCP_LOG_INFO(fmt, args...) do { } while (0)
|
|
#else
|
|
# define ZFCP_LOG_INFO(fmt, args...) \
|
|
do { \
|
|
if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \
|
|
printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
|
|
} while (0)
|
|
#endif
|
|
|
|
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG
|
|
# define ZFCP_LOG_DEBUG(fmt, args...) do { } while (0)
|
|
#else
|
|
# define ZFCP_LOG_DEBUG(fmt, args...) \
|
|
ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args)
|
|
#endif
|
|
|
|
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE
|
|
# define ZFCP_LOG_TRACE(fmt, args...) do { } while (0)
|
|
#else
|
|
# define ZFCP_LOG_TRACE(fmt, args...) \
|
|
ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args)
|
|
#endif
|
|
|
|
/*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/
|
|
|
|
/*
|
|
* Note, the leftmost status byte is common among adapter, port
|
|
* and unit
|
|
*/
|
|
#define ZFCP_COMMON_FLAGS 0xfff00000
|
|
|
|
/* common status bits */
|
|
#define ZFCP_STATUS_COMMON_REMOVE 0x80000000
|
|
#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
|
|
#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
|
|
#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
|
|
#define ZFCP_STATUS_COMMON_OPENING 0x08000000
|
|
#define ZFCP_STATUS_COMMON_OPEN 0x04000000
|
|
#define ZFCP_STATUS_COMMON_CLOSING 0x02000000
|
|
#define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
|
|
#define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
|
|
#define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
|
|
|
|
/* adapter status */
|
|
#define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
|
|
#define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004
|
|
#define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
|
|
#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
|
|
#define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP 0x00000020
|
|
#define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL 0x00000080
|
|
#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
|
|
#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
|
|
#define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800
|
|
|
|
/* FC-PH/FC-GS well-known address identifiers for generic services */
|
|
#define ZFCP_DID_MANAGEMENT_SERVICE 0xFFFFFA
|
|
#define ZFCP_DID_TIME_SERVICE 0xFFFFFB
|
|
#define ZFCP_DID_DIRECTORY_SERVICE 0xFFFFFC
|
|
#define ZFCP_DID_ALIAS_SERVICE 0xFFFFF8
|
|
#define ZFCP_DID_KEY_DISTRIBUTION_SERVICE 0xFFFFF7
|
|
|
|
/* remote port status */
|
|
#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
|
|
#define ZFCP_STATUS_PORT_DID_DID 0x00000002
|
|
#define ZFCP_STATUS_PORT_PHYS_CLOSING 0x00000004
|
|
#define ZFCP_STATUS_PORT_NO_WWPN 0x00000008
|
|
#define ZFCP_STATUS_PORT_NO_SCSI_ID 0x00000010
|
|
#define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020
|
|
|
|
/* for ports with well known addresses */
|
|
#define ZFCP_STATUS_PORT_WKA \
|
|
(ZFCP_STATUS_PORT_NO_WWPN | \
|
|
ZFCP_STATUS_PORT_NO_SCSI_ID)
|
|
|
|
/* logical unit status */
|
|
#define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET 0x00000001
|
|
#define ZFCP_STATUS_UNIT_TEMPORARY 0x00000002
|
|
#define ZFCP_STATUS_UNIT_SHARED 0x00000004
|
|
#define ZFCP_STATUS_UNIT_READONLY 0x00000008
|
|
#define ZFCP_STATUS_UNIT_REGISTERED 0x00000010
|
|
|
|
/* FSF request status (this does not have a common part) */
|
|
#define ZFCP_STATUS_FSFREQ_NOT_INIT 0x00000000
|
|
#define ZFCP_STATUS_FSFREQ_POOL 0x00000001
|
|
#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
|
|
#define ZFCP_STATUS_FSFREQ_COMPLETED 0x00000004
|
|
#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
|
|
#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
|
|
#define ZFCP_STATUS_FSFREQ_ABORTING 0x00000020
|
|
#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
|
|
#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
|
|
#define ZFCP_STATUS_FSFREQ_ABORTED 0x00000100
|
|
#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
|
|
#define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP 0x00000400
|
|
#define ZFCP_STATUS_FSFREQ_RETRY 0x00000800
|
|
#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
|
|
|
|
/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
|
|
|
|
#define ZFCP_MAX_ERPS 3
|
|
|
|
#define ZFCP_ERP_FSFREQ_TIMEOUT (30 * HZ)
|
|
#define ZFCP_ERP_MEMWAIT_TIMEOUT HZ
|
|
|
|
#define ZFCP_STATUS_ERP_TIMEDOUT 0x10000000
|
|
#define ZFCP_STATUS_ERP_CLOSE_ONLY 0x01000000
|
|
#define ZFCP_STATUS_ERP_DISMISSING 0x00100000
|
|
#define ZFCP_STATUS_ERP_DISMISSED 0x00200000
|
|
#define ZFCP_STATUS_ERP_LOWMEM 0x00400000
|
|
|
|
#define ZFCP_ERP_STEP_UNINITIALIZED 0x00000000
|
|
#define ZFCP_ERP_STEP_FSF_XCONFIG 0x00000001
|
|
#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING 0x00000010
|
|
#define ZFCP_ERP_STEP_PORT_CLOSING 0x00000100
|
|
#define ZFCP_ERP_STEP_NAMESERVER_OPEN 0x00000200
|
|
#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP 0x00000400
|
|
#define ZFCP_ERP_STEP_PORT_OPENING 0x00000800
|
|
#define ZFCP_ERP_STEP_UNIT_CLOSING 0x00001000
|
|
#define ZFCP_ERP_STEP_UNIT_OPENING 0x00002000
|
|
|
|
/* Ordered by escalation level (necessary for proper erp-code operation) */
|
|
#define ZFCP_ERP_ACTION_REOPEN_ADAPTER 0x4
|
|
#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED 0x3
|
|
#define ZFCP_ERP_ACTION_REOPEN_PORT 0x2
|
|
#define ZFCP_ERP_ACTION_REOPEN_UNIT 0x1
|
|
|
|
#define ZFCP_ERP_ACTION_RUNNING 0x1
|
|
#define ZFCP_ERP_ACTION_READY 0x2
|
|
|
|
#define ZFCP_ERP_SUCCEEDED 0x0
|
|
#define ZFCP_ERP_FAILED 0x1
|
|
#define ZFCP_ERP_CONTINUES 0x2
|
|
#define ZFCP_ERP_EXIT 0x3
|
|
#define ZFCP_ERP_DISMISSED 0x4
|
|
#define ZFCP_ERP_NOMEM 0x5
|
|
|
|
|
|
/******************** CFDC SPECIFIC STUFF *****************************/
|
|
|
|
/* Firewall data channel sense data record */
|
|
struct zfcp_cfdc_sense_data {
|
|
u32 signature; /* Request signature */
|
|
u32 devno; /* FCP adapter device number */
|
|
u32 command; /* Command code */
|
|
u32 fsf_status; /* FSF request status and status qualifier */
|
|
u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
|
|
u8 payloads[256]; /* Access conflicts list */
|
|
u8 control_file[0]; /* Access control table */
|
|
};
|
|
|
|
#define ZFCP_CFDC_SIGNATURE 0xCFDCACDF
|
|
|
|
#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
|
|
#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
|
|
#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
|
|
#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
|
|
#define ZFCP_CFDC_CMND_UPLOAD 0x00010002
|
|
|
|
#define ZFCP_CFDC_DOWNLOAD 0x00000001
|
|
#define ZFCP_CFDC_UPLOAD 0x00000002
|
|
#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
|
|
|
|
#define ZFCP_CFDC_DEV_NAME "zfcp_cfdc"
|
|
#define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR
|
|
#define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR
|
|
|
|
#define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024
|
|
|
|
/************************* STRUCTURE DEFINITIONS *****************************/
|
|
|
|
struct zfcp_fsf_req;
|
|
|
|
/* holds various memory pools of an adapter */
|
|
struct zfcp_adapter_mempool {
|
|
mempool_t *fsf_req_erp;
|
|
mempool_t *fsf_req_scsi;
|
|
mempool_t *fsf_req_abort;
|
|
mempool_t *fsf_req_status_read;
|
|
mempool_t *data_status_read;
|
|
mempool_t *data_gid_pn;
|
|
};
|
|
|
|
/*
|
|
* header for CT_IU
|
|
*/
|
|
struct ct_hdr {
|
|
u8 revision; // 0x01
|
|
u8 in_id[3]; // 0x00
|
|
u8 gs_type; // 0xFC Directory Service
|
|
u8 gs_subtype; // 0x02 Name Server
|
|
u8 options; // 0x00 single bidirectional exchange
|
|
u8 reserved0;
|
|
u16 cmd_rsp_code; // 0x0121 GID_PN, or 0x0100 GA_NXT
|
|
u16 max_res_size; // <= (4096 - 16) / 4
|
|
u8 reserved1;
|
|
u8 reason_code;
|
|
u8 reason_code_expl;
|
|
u8 vendor_unique;
|
|
} __attribute__ ((packed));
|
|
|
|
/* nameserver request CT_IU -- for requests where
|
|
* a port name is required */
|
|
struct ct_iu_gid_pn_req {
|
|
struct ct_hdr header;
|
|
wwn_t wwpn;
|
|
} __attribute__ ((packed));
|
|
|
|
/* FS_ACC IU and data unit for GID_PN nameserver request */
|
|
struct ct_iu_gid_pn_resp {
|
|
struct ct_hdr header;
|
|
u32 d_id;
|
|
} __attribute__ ((packed));
|
|
|
|
typedef void (*zfcp_send_ct_handler_t)(unsigned long);
|
|
|
|
/**
|
|
* struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct
|
|
* @port: port where the request is sent to
|
|
* @req: scatter-gather list for request
|
|
* @resp: scatter-gather list for response
|
|
* @req_count: number of elements in request scatter-gather list
|
|
* @resp_count: number of elements in response scatter-gather list
|
|
* @handler: handler function (called for response to the request)
|
|
* @handler_data: data passed to handler function
|
|
* @pool: pointer to memory pool for ct request structure
|
|
* @timeout: FSF timeout for this request
|
|
* @completion: completion for synchronization purposes
|
|
* @status: used to pass error status to calling function
|
|
*/
|
|
struct zfcp_send_ct {
|
|
struct zfcp_port *port;
|
|
struct scatterlist *req;
|
|
struct scatterlist *resp;
|
|
unsigned int req_count;
|
|
unsigned int resp_count;
|
|
zfcp_send_ct_handler_t handler;
|
|
unsigned long handler_data;
|
|
mempool_t *pool;
|
|
int timeout;
|
|
struct completion *completion;
|
|
int status;
|
|
};
|
|
|
|
/* used for name server requests in error recovery */
|
|
struct zfcp_gid_pn_data {
|
|
struct zfcp_send_ct ct;
|
|
struct scatterlist req;
|
|
struct scatterlist resp;
|
|
struct ct_iu_gid_pn_req ct_iu_req;
|
|
struct ct_iu_gid_pn_resp ct_iu_resp;
|
|
struct zfcp_port *port;
|
|
};
|
|
|
|
typedef void (*zfcp_send_els_handler_t)(unsigned long);
|
|
|
|
/**
|
|
* struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
|
|
* @adapter: adapter where request is sent from
|
|
* @port: port where ELS is destinated (port reference count has to be increased)
|
|
* @d_id: destiniation id of port where request is sent to
|
|
* @req: scatter-gather list for request
|
|
* @resp: scatter-gather list for response
|
|
* @req_count: number of elements in request scatter-gather list
|
|
* @resp_count: number of elements in response scatter-gather list
|
|
* @handler: handler function (called for response to the request)
|
|
* @handler_data: data passed to handler function
|
|
* @completion: completion for synchronization purposes
|
|
* @ls_code: hex code of ELS command
|
|
* @status: used to pass error status to calling function
|
|
*/
|
|
struct zfcp_send_els {
|
|
struct zfcp_adapter *adapter;
|
|
struct zfcp_port *port;
|
|
u32 d_id;
|
|
struct scatterlist *req;
|
|
struct scatterlist *resp;
|
|
unsigned int req_count;
|
|
unsigned int resp_count;
|
|
zfcp_send_els_handler_t handler;
|
|
unsigned long handler_data;
|
|
struct completion *completion;
|
|
int ls_code;
|
|
int status;
|
|
};
|
|
|
|
struct zfcp_qdio_queue {
|
|
struct qdio_buffer *buffer[QDIO_MAX_BUFFERS_PER_Q]; /* SBALs */
|
|
u8 free_index; /* index of next free bfr
|
|
in queue (free_count>0) */
|
|
atomic_t free_count; /* number of free buffers
|
|
in queue */
|
|
rwlock_t queue_lock; /* lock for operations on queue */
|
|
int distance_from_int; /* SBALs used since PCI indication
|
|
was last set */
|
|
};
|
|
|
|
struct zfcp_erp_action {
|
|
struct list_head list;
|
|
int action; /* requested action code */
|
|
struct zfcp_adapter *adapter; /* device which should be recovered */
|
|
struct zfcp_port *port;
|
|
struct zfcp_unit *unit;
|
|
volatile u32 status; /* recovery status */
|
|
u32 step; /* active step of this erp action */
|
|
struct zfcp_fsf_req *fsf_req; /* fsf request currently pending
|
|
for this action */
|
|
struct timer_list timer;
|
|
};
|
|
|
|
|
|
struct zfcp_adapter {
|
|
struct list_head list; /* list of adapters */
|
|
atomic_t refcount; /* reference count */
|
|
wait_queue_head_t remove_wq; /* can be used to wait for
|
|
refcount drop to zero */
|
|
wwn_t peer_wwnn; /* P2P peer WWNN */
|
|
wwn_t peer_wwpn; /* P2P peer WWPN */
|
|
u32 peer_d_id; /* P2P peer D_ID */
|
|
struct ccw_device *ccw_device; /* S/390 ccw device */
|
|
u32 hydra_version; /* Hydra version */
|
|
u32 fsf_lic_version;
|
|
u32 adapter_features; /* FCP channel features */
|
|
u32 connection_features; /* host connection features */
|
|
u32 hardware_version; /* of FCP channel */
|
|
struct Scsi_Host *scsi_host; /* Pointer to mid-layer */
|
|
struct list_head port_list_head; /* remote port list */
|
|
struct list_head port_remove_lh; /* head of ports to be
|
|
removed */
|
|
u32 ports; /* number of remote ports */
|
|
atomic_t reqs_active; /* # active FSF reqs */
|
|
unsigned long req_no; /* unique FSF req number */
|
|
struct list_head *req_list; /* list of pending reqs */
|
|
spinlock_t req_list_lock; /* request list lock */
|
|
struct zfcp_qdio_queue request_queue; /* request queue */
|
|
u32 fsf_req_seq_no; /* FSF cmnd seq number */
|
|
wait_queue_head_t request_wq; /* can be used to wait for
|
|
more avaliable SBALs */
|
|
struct zfcp_qdio_queue response_queue; /* response queue */
|
|
rwlock_t abort_lock; /* Protects against SCSI
|
|
stack abort/command
|
|
completion races */
|
|
u16 status_read_failed; /* # failed status reads */
|
|
atomic_t status; /* status of this adapter */
|
|
struct list_head erp_ready_head; /* error recovery for this
|
|
adapter/devices */
|
|
struct list_head erp_running_head;
|
|
rwlock_t erp_lock;
|
|
struct semaphore erp_ready_sem;
|
|
wait_queue_head_t erp_thread_wqh;
|
|
wait_queue_head_t erp_done_wqh;
|
|
struct zfcp_erp_action erp_action; /* pending error recovery */
|
|
atomic_t erp_counter;
|
|
u32 erp_total_count; /* total nr of enqueued erp
|
|
actions */
|
|
u32 erp_low_mem_count; /* nr of erp actions waiting
|
|
for memory */
|
|
struct zfcp_port *nameserver_port; /* adapter's nameserver */
|
|
debug_info_t *erp_dbf;
|
|
debug_info_t *hba_dbf;
|
|
debug_info_t *san_dbf; /* debug feature areas */
|
|
debug_info_t *scsi_dbf;
|
|
spinlock_t erp_dbf_lock;
|
|
spinlock_t hba_dbf_lock;
|
|
spinlock_t san_dbf_lock;
|
|
spinlock_t scsi_dbf_lock;
|
|
struct zfcp_erp_dbf_record erp_dbf_buf;
|
|
struct zfcp_hba_dbf_record hba_dbf_buf;
|
|
struct zfcp_san_dbf_record san_dbf_buf;
|
|
struct zfcp_scsi_dbf_record scsi_dbf_buf;
|
|
struct zfcp_adapter_mempool pool; /* Adapter memory pools */
|
|
struct qdio_initialize qdio_init_data; /* for qdio_establish */
|
|
struct device generic_services; /* directory for WKA ports */
|
|
struct fc_host_statistics *fc_stats;
|
|
struct fsf_qtcb_bottom_port *stats_reset_data;
|
|
unsigned long stats_reset;
|
|
};
|
|
|
|
/*
|
|
* the struct device sysfs_device must be at the beginning of this structure.
|
|
* pointer to struct device is used to free port structure in release function
|
|
* of the device. don't change!
|
|
*/
|
|
struct zfcp_port {
|
|
struct device sysfs_device; /* sysfs device */
|
|
struct fc_rport *rport; /* rport of fc transport class */
|
|
struct list_head list; /* list of remote ports */
|
|
atomic_t refcount; /* reference count */
|
|
wait_queue_head_t remove_wq; /* can be used to wait for
|
|
refcount drop to zero */
|
|
struct zfcp_adapter *adapter; /* adapter used to access port */
|
|
struct list_head unit_list_head; /* head of logical unit list */
|
|
struct list_head unit_remove_lh; /* head of luns to be removed
|
|
list */
|
|
u32 units; /* # of logical units in list */
|
|
atomic_t status; /* status of this remote port */
|
|
wwn_t wwnn; /* WWNN if known */
|
|
wwn_t wwpn; /* WWPN */
|
|
u32 d_id; /* D_ID */
|
|
u32 handle; /* handle assigned by FSF */
|
|
struct zfcp_erp_action erp_action; /* pending error recovery */
|
|
atomic_t erp_counter;
|
|
u32 maxframe_size;
|
|
u32 supported_classes;
|
|
};
|
|
|
|
/* the struct device sysfs_device must be at the beginning of this structure.
|
|
* pointer to struct device is used to free unit structure in release function
|
|
* of the device. don't change!
|
|
*/
|
|
struct zfcp_unit {
|
|
struct device sysfs_device; /* sysfs device */
|
|
struct list_head list; /* list of logical units */
|
|
atomic_t refcount; /* reference count */
|
|
wait_queue_head_t remove_wq; /* can be used to wait for
|
|
refcount drop to zero */
|
|
struct zfcp_port *port; /* remote port of unit */
|
|
atomic_t status; /* status of this logical unit */
|
|
unsigned int scsi_lun; /* own SCSI LUN */
|
|
fcp_lun_t fcp_lun; /* own FCP_LUN */
|
|
u32 handle; /* handle assigned by FSF */
|
|
struct scsi_device *device; /* scsi device struct pointer */
|
|
struct zfcp_erp_action erp_action; /* pending error recovery */
|
|
atomic_t erp_counter;
|
|
};
|
|
|
|
/* FSF request */
|
|
struct zfcp_fsf_req {
|
|
struct list_head list; /* list of FSF requests */
|
|
unsigned long req_id; /* unique request ID */
|
|
struct zfcp_adapter *adapter; /* adapter request belongs to */
|
|
u8 sbal_number; /* nr of SBALs free for use */
|
|
u8 sbal_first; /* first SBAL for this request */
|
|
u8 sbal_last; /* last possible SBAL for
|
|
this reuest */
|
|
u8 sbal_curr; /* current SBAL during creation
|
|
of request */
|
|
u8 sbale_curr; /* current SBALE during creation
|
|
of request */
|
|
wait_queue_head_t completion_wq; /* can be used by a routine
|
|
to wait for completion */
|
|
volatile u32 status; /* status of this request */
|
|
u32 fsf_command; /* FSF Command copy */
|
|
struct fsf_qtcb *qtcb; /* address of associated QTCB */
|
|
u32 seq_no; /* Sequence number of request */
|
|
unsigned long data; /* private data of request */
|
|
struct timer_list timer; /* used for erp or scsi er */
|
|
struct zfcp_erp_action *erp_action; /* used if this request is
|
|
issued on behalf of erp */
|
|
mempool_t *pool; /* used if request was alloacted
|
|
from emergency pool */
|
|
unsigned long long issued; /* request sent time (STCK) */
|
|
struct zfcp_unit *unit;
|
|
};
|
|
|
|
typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
|
|
|
|
/* driver data */
|
|
struct zfcp_data {
|
|
struct scsi_host_template scsi_host_template;
|
|
struct scsi_transport_template *scsi_transport_template;
|
|
atomic_t status; /* Module status flags */
|
|
struct list_head adapter_list_head; /* head of adapter list */
|
|
struct list_head adapter_remove_lh; /* head of adapters to be
|
|
removed */
|
|
u32 adapters; /* # of adapters in list */
|
|
rwlock_t config_lock; /* serialises changes
|
|
to adapter/port/unit
|
|
lists */
|
|
struct semaphore config_sema; /* serialises configuration
|
|
changes */
|
|
atomic_t loglevel; /* current loglevel */
|
|
char init_busid[BUS_ID_SIZE];
|
|
wwn_t init_wwpn;
|
|
fcp_lun_t init_fcp_lun;
|
|
char *driver_version;
|
|
struct kmem_cache *fsf_req_qtcb_cache;
|
|
struct kmem_cache *sr_buffer_cache;
|
|
struct kmem_cache *gid_pn_cache;
|
|
};
|
|
|
|
/**
|
|
* struct zfcp_sg_list - struct describing a scatter-gather list
|
|
* @sg: pointer to array of (struct scatterlist)
|
|
* @count: number of elements in scatter-gather list
|
|
*/
|
|
struct zfcp_sg_list {
|
|
struct scatterlist *sg;
|
|
unsigned int count;
|
|
};
|
|
|
|
/* number of elements for various memory pools */
|
|
#define ZFCP_POOL_FSF_REQ_ERP_NR 1
|
|
#define ZFCP_POOL_FSF_REQ_SCSI_NR 1
|
|
#define ZFCP_POOL_FSF_REQ_ABORT_NR 1
|
|
#define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM
|
|
#define ZFCP_POOL_DATA_GID_PN_NR 1
|
|
|
|
/* struct used by memory pools for fsf_requests */
|
|
struct zfcp_fsf_req_qtcb {
|
|
struct zfcp_fsf_req fsf_req;
|
|
struct fsf_qtcb qtcb;
|
|
};
|
|
|
|
/********************** ZFCP SPECIFIC DEFINES ********************************/
|
|
|
|
#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
|
|
#define ZFCP_WAIT_FOR_SBAL 0x00000004
|
|
#define ZFCP_REQ_NO_QTCB 0x00000008
|
|
|
|
#define ZFCP_SET 0x00000100
|
|
#define ZFCP_CLEAR 0x00000200
|
|
|
|
#ifndef atomic_test_mask
|
|
#define atomic_test_mask(mask, target) \
|
|
((atomic_read(target) & mask) == mask)
|
|
#endif
|
|
|
|
extern void _zfcp_hex_dump(char *, int);
|
|
#define ZFCP_HEX_DUMP(level, addr, count) \
|
|
if (ZFCP_LOG_CHECK(level)) { \
|
|
_zfcp_hex_dump(addr, count); \
|
|
}
|
|
|
|
#define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
|
|
#define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
|
|
#define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
|
|
|
|
/*
|
|
* functions needed for reference/usage counting
|
|
*/
|
|
|
|
static inline void
|
|
zfcp_unit_get(struct zfcp_unit *unit)
|
|
{
|
|
atomic_inc(&unit->refcount);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_unit_put(struct zfcp_unit *unit)
|
|
{
|
|
if (atomic_dec_return(&unit->refcount) == 0)
|
|
wake_up(&unit->remove_wq);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_unit_wait(struct zfcp_unit *unit)
|
|
{
|
|
wait_event(unit->remove_wq, atomic_read(&unit->refcount) == 0);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_port_get(struct zfcp_port *port)
|
|
{
|
|
atomic_inc(&port->refcount);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_port_put(struct zfcp_port *port)
|
|
{
|
|
if (atomic_dec_return(&port->refcount) == 0)
|
|
wake_up(&port->remove_wq);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_port_wait(struct zfcp_port *port)
|
|
{
|
|
wait_event(port->remove_wq, atomic_read(&port->refcount) == 0);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_adapter_get(struct zfcp_adapter *adapter)
|
|
{
|
|
atomic_inc(&adapter->refcount);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_adapter_put(struct zfcp_adapter *adapter)
|
|
{
|
|
if (atomic_dec_return(&adapter->refcount) == 0)
|
|
wake_up(&adapter->remove_wq);
|
|
}
|
|
|
|
static inline void
|
|
zfcp_adapter_wait(struct zfcp_adapter *adapter)
|
|
{
|
|
wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0);
|
|
}
|
|
|
|
#endif /* ZFCP_DEF_H */
|