diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_def.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 1223 |
1 files changed, 174 insertions, 1049 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index e260d19fa71..d91173f326c 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -1,35 +1,10 @@ -/* - * - * linux/drivers/s390/scsi/zfcp_def.h - * - * FCP adapter driver for IBM eServer zSeries - * - * (C) Copyright IBM Corp. 2002, 2004 +/* + * zfcp device driver * - * Author(s): Martin Peschke <mpeschke@de.ibm.com> - * Raimund Schroeder <raimund.schroeder@de.ibm.com> - * Aron Zeh - * Wolfgang Taphorn - * Stefan Bader <stefan.bader@de.ibm.com> - * Heiko Carstens <heiko.carstens@de.ibm.com> - * Andreas Herrmann <aherrman@de.ibm.com> - * Volker Sameske <sameske@de.ibm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - + * Global definitions for the zfcp device driver. + * + * Copyright IBM Corp. 2002, 2010 + */ #ifndef ZFCP_DEF_H #define ZFCP_DEF_H @@ -38,11 +13,17 @@ #include <linux/init.h> #include <linux/moduleparam.h> -#include <linux/miscdevice.h> #include <linux/major.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/timer.h> +#include <linux/slab.h> +#include <linux/mempool.h> +#include <linux/syscalls.h> +#include <linux/scatterlist.h> +#include <linux/ioctl.h> +#include <scsi/fc/fc_fs.h> +#include <scsi/fc/fc_gs.h> #include <scsi/scsi.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_cmnd.h> @@ -50,847 +31,83 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_fc.h> -#include "../../fc4/fc.h" -#include "zfcp_fsf.h" +#include <scsi/scsi_bsg_fc.h> #include <asm/ccwdev.h> -#include <asm/qdio.h> #include <asm/debug.h> #include <asm/ebcdic.h> -#include <linux/mempool.h> -#include <linux/syscalls.h> -#include <linux/ioctl.h> - - -/********************* GENERAL DEFINES *********************************/ +#include <asm/sysinfo.h> +#include "zfcp_fsf.h" +#include "zfcp_fc.h" +#include "zfcp_qdio.h" -/* zfcp version number, it consists of major, minor, and patch-level number */ -#define ZFCP_VERSION "4.5.0" - -/** - * zfcp_sg_to_address - determine kernel address from struct scatterlist - * @list: struct scatterlist - * Return: kernel address - */ -static inline void * -zfcp_sg_to_address(struct scatterlist *list) -{ - return (void *) (page_address(list->page) + list->offset); -} - -/** - * zfcp_address_to_sg - set up struct scatterlist from kernel address - * @address: kernel address - * @list: struct scatterlist - */ -static inline void -zfcp_address_to_sg(void *address, struct scatterlist *list) -{ - list->page = virt_to_page(address); - list->offset = ((unsigned long) address) & (PAGE_SIZE - 1); -} +struct zfcp_reqlist; /********************* SCSI SPECIFIC DEFINES *********************************/ - -/* 32 bit for SCSI ID and LUN as long as the SCSI stack uses this type */ -typedef u32 scsi_id_t; -typedef u32 scsi_lun_t; - -#define ZFCP_ERP_SCSI_LOW_MEM_TIMEOUT (100*HZ) -#define ZFCP_SCSI_ER_TIMEOUT (100*HZ) - -/********************* CIO/QDIO SPECIFIC DEFINES *****************************/ - -/* Adapter Identification Parameters */ -#define ZFCP_CONTROL_UNIT_TYPE 0x1731 -#define ZFCP_CONTROL_UNIT_MODEL 0x03 -#define ZFCP_DEVICE_TYPE 0x1732 -#define ZFCP_DEVICE_MODEL 0x03 -#define ZFCP_DEVICE_MODEL_PRIV 0x04 - -/* allow as many chained SBALs as are supported by hardware */ -#define ZFCP_MAX_SBALS_PER_REQ FSF_MAX_SBALS_PER_REQ -#define ZFCP_MAX_SBALS_PER_CT_REQ FSF_MAX_SBALS_PER_REQ -#define ZFCP_MAX_SBALS_PER_ELS_REQ FSF_MAX_SBALS_PER_ELS_REQ - -/* DMQ bug workaround: don't use last SBALE */ -#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) - -/* index of last SBALE (with respect to DMQ bug workaround) */ -#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) - -/* max. number of (data buffer) SBALEs in largest SBAL chain */ -#define ZFCP_MAX_SBALES_PER_REQ \ - (ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) - /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ - -/* FIXME(tune): free space should be one max. SBAL chain plus what? */ -#define ZFCP_QDIO_PCI_INTERVAL (QDIO_MAX_BUFFERS_PER_Q \ - - (ZFCP_MAX_SBALS_PER_REQ + 4)) - -#define ZFCP_SBAL_TIMEOUT (5*HZ) - -#define ZFCP_TYPE2_RECOVERY_TIME (8*HZ) - -/* queue polling (values in microseconds) */ -#define ZFCP_MAX_INPUT_THRESHOLD 5000 /* FIXME: tune */ -#define ZFCP_MAX_OUTPUT_THRESHOLD 1000 /* FIXME: tune */ -#define ZFCP_MIN_INPUT_THRESHOLD 1 /* ignored by QDIO layer */ -#define ZFCP_MIN_OUTPUT_THRESHOLD 1 /* ignored by QDIO layer */ - -#define QDIO_SCSI_QFMT 1 /* 1 for FSF */ +#define ZFCP_SCSI_ER_TIMEOUT (10*HZ) /********************* FSF SPECIFIC DEFINES *********************************/ -#define ZFCP_ULP_INFO_VERSION 26 -#define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION /* ATTENTION: value must not be used by hardware */ #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 -#define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 -#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM - -/* Do 1st retry in 1 second, then double the timeout for each following retry */ -#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100 -#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 - -/* Retry 5 times every 2 second, then every minute */ -#define ZFCP_EXCHANGE_PORT_DATA_SHORT_RETRIES 5 -#define ZFCP_EXCHANGE_PORT_DATA_SHORT_SLEEP 200 -#define ZFCP_EXCHANGE_PORT_DATA_LONG_SLEEP 6000 /* timeout value for "default timer" for fsf requests */ -#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ); - -/*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ - -typedef unsigned long long wwn_t; -typedef unsigned long long fcp_lun_t; -/* data length field may be at variable position in FCP-2 FCP_CMND IU */ -typedef unsigned int fcp_dl_t; - -#define ZFCP_FC_SERVICE_CLASS_DEFAULT FSF_CLASS_3 - -/* timeout for name-server lookup (in seconds) */ -#define ZFCP_NS_GID_PN_TIMEOUT 10 - -/* largest SCSI command we can process */ -/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */ -#define ZFCP_MAX_SCSI_CMND_LENGTH 255 -/* maximum number of commands in LUN queue (tagged queueing) */ -#define ZFCP_CMND_PER_LUN 32 - -/* task attribute values in FCP-2 FCP_CMND IU */ -#define SIMPLE_Q 0 -#define HEAD_OF_Q 1 -#define ORDERED_Q 2 -#define ACA_Q 4 -#define UNTAGGED 5 - -/* task management flags in FCP-2 FCP_CMND IU */ -#define FCP_CLEAR_ACA 0x40 -#define FCP_TARGET_RESET 0x20 -#define FCP_LOGICAL_UNIT_RESET 0x10 -#define FCP_CLEAR_TASK_SET 0x04 -#define FCP_ABORT_TASK_SET 0x02 - -#define FCP_CDB_LENGTH 16 - -#define ZFCP_DID_MASK 0x00FFFFFF - -/* FCP(-2) FCP_CMND IU */ -struct fcp_cmnd_iu { - fcp_lun_t fcp_lun; /* FCP logical unit number */ - u8 crn; /* command reference number */ - u8 reserved0:5; /* reserved */ - u8 task_attribute:3; /* task attribute */ - u8 task_management_flags; /* task management flags */ - u8 add_fcp_cdb_length:6; /* additional FCP_CDB length */ - u8 rddata:1; /* read data */ - u8 wddata:1; /* write data */ - u8 fcp_cdb[FCP_CDB_LENGTH]; -} __attribute__((packed)); - -/* FCP(-2) FCP_RSP IU */ -struct fcp_rsp_iu { - u8 reserved0[10]; - union { - struct { - u8 reserved1:3; - u8 fcp_conf_req:1; - u8 fcp_resid_under:1; - u8 fcp_resid_over:1; - u8 fcp_sns_len_valid:1; - u8 fcp_rsp_len_valid:1; - } bits; - u8 value; - } validity; - u8 scsi_status; - u32 fcp_resid; - u32 fcp_sns_len; - u32 fcp_rsp_len; -} __attribute__((packed)); - - -#define RSP_CODE_GOOD 0 -#define RSP_CODE_LENGTH_MISMATCH 1 -#define RSP_CODE_FIELD_INVALID 2 -#define RSP_CODE_RO_MISMATCH 3 -#define RSP_CODE_TASKMAN_UNSUPP 4 -#define RSP_CODE_TASKMAN_FAILED 5 - -/* see fc-fs */ -#define LS_FAN 0x60000000 -#define LS_RSCN 0x61040000 - -struct fcp_rscn_head { - u8 command; - u8 page_length; /* always 0x04 */ - u16 payload_len; -} __attribute__((packed)); - -struct fcp_rscn_element { - u8 reserved:2; - u8 event_qual:4; - u8 addr_format:2; - u32 nport_did:24; -} __attribute__((packed)); - -#define ZFCP_PORT_ADDRESS 0x0 -#define ZFCP_AREA_ADDRESS 0x1 -#define ZFCP_DOMAIN_ADDRESS 0x2 -#define ZFCP_FABRIC_ADDRESS 0x3 - -#define ZFCP_PORTS_RANGE_PORT 0xFFFFFF -#define ZFCP_PORTS_RANGE_AREA 0xFFFF00 -#define ZFCP_PORTS_RANGE_DOMAIN 0xFF0000 -#define ZFCP_PORTS_RANGE_FABRIC 0x000000 - -#define ZFCP_NO_PORTS_PER_AREA 0x100 -#define ZFCP_NO_PORTS_PER_DOMAIN 0x10000 -#define ZFCP_NO_PORTS_PER_FABRIC 0x1000000 - -struct fcp_fan { - u32 command; - u32 fport_did; - wwn_t fport_wwpn; - wwn_t fport_wwname; -} __attribute__((packed)); - -/* see fc-ph */ -struct fcp_logo { - u32 command; - u32 nport_did; - wwn_t nport_wwpn; -} __attribute__((packed)); - -/* - * DBF stuff - */ -#define ZFCP_DBF_TAG_SIZE 4 - -struct zfcp_dbf_dump { - u8 tag[ZFCP_DBF_TAG_SIZE]; - u32 total_size; /* size of total dump data */ - u32 offset; /* how much data has being already dumped */ - u32 size; /* how much data comes with this record */ - u8 data[]; /* dump data */ -} __attribute__ ((packed)); - -/* FIXME: to be inflated when reworking the erp dbf */ -struct zfcp_erp_dbf_record { - u8 dummy[16]; -} __attribute__ ((packed)); - -struct zfcp_hba_dbf_record_response { - u32 fsf_command; - u64 fsf_reqid; - u32 fsf_seqno; - u64 fsf_issued; - u32 fsf_prot_status; - u32 fsf_status; - u8 fsf_prot_status_qual[FSF_PROT_STATUS_QUAL_SIZE]; - u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE]; - u32 fsf_req_status; - u8 sbal_first; - u8 sbal_curr; - u8 sbal_last; - u8 pool; - u64 erp_action; - union { - struct { - u64 scsi_cmnd; - u64 scsi_serial; - } send_fcp; - struct { - u64 wwpn; - u32 d_id; - u32 port_handle; - } port; - struct { - u64 wwpn; - u64 fcp_lun; - u32 port_handle; - u32 lun_handle; - } unit; - struct { - u32 d_id; - u8 ls_code; - } send_els; - } data; -} __attribute__ ((packed)); - -struct zfcp_hba_dbf_record_status { - u8 failed; - u32 status_type; - u32 status_subtype; - struct fsf_queue_designator - queue_designator; - u32 payload_size; -#define ZFCP_DBF_UNSOL_PAYLOAD 80 -#define ZFCP_DBF_UNSOL_PAYLOAD_SENSE_DATA_AVAIL 32 -#define ZFCP_DBF_UNSOL_PAYLOAD_BIT_ERROR_THRESHOLD 56 -#define ZFCP_DBF_UNSOL_PAYLOAD_FEATURE_UPDATE_ALERT 2 * sizeof(u32) - u8 payload[ZFCP_DBF_UNSOL_PAYLOAD]; -} __attribute__ ((packed)); - -struct zfcp_hba_dbf_record_qdio { - u32 status; - u32 qdio_error; - u32 siga_error; - u8 sbal_index; - u8 sbal_count; -} __attribute__ ((packed)); - -struct zfcp_hba_dbf_record { - u8 tag[ZFCP_DBF_TAG_SIZE]; - u8 tag2[ZFCP_DBF_TAG_SIZE]; - union { - struct zfcp_hba_dbf_record_response response; - struct zfcp_hba_dbf_record_status status; - struct zfcp_hba_dbf_record_qdio qdio; - } type; -} __attribute__ ((packed)); - -struct zfcp_san_dbf_record_ct { - union { - struct { - u16 cmd_req_code; - u8 revision; - u8 gs_type; - u8 gs_subtype; - u8 options; - u16 max_res_size; - } request; - struct { - u16 cmd_rsp_code; - u8 revision; - u8 reason_code; - u8 reason_code_expl; - u8 vendor_unique; - } response; - } type; - u32 payload_size; -#define ZFCP_DBF_CT_PAYLOAD 24 - u8 payload[ZFCP_DBF_CT_PAYLOAD]; -} __attribute__ ((packed)); - -struct zfcp_san_dbf_record_els { - u8 ls_code; - u32 payload_size; -#define ZFCP_DBF_ELS_PAYLOAD 32 -#define ZFCP_DBF_ELS_MAX_PAYLOAD 1024 - u8 payload[ZFCP_DBF_ELS_PAYLOAD]; -} __attribute__ ((packed)); - -struct zfcp_san_dbf_record { - u8 tag[ZFCP_DBF_TAG_SIZE]; - u64 fsf_reqid; - u32 fsf_seqno; - u32 s_id; - u32 d_id; - union { - struct zfcp_san_dbf_record_ct ct; - struct zfcp_san_dbf_record_els els; - } type; -} __attribute__ ((packed)); - -struct zfcp_scsi_dbf_record { - u8 tag[ZFCP_DBF_TAG_SIZE]; - u8 tag2[ZFCP_DBF_TAG_SIZE]; - u32 scsi_id; - u32 scsi_lun; - u32 scsi_result; - u64 scsi_cmnd; - u64 scsi_serial; -#define ZFCP_DBF_SCSI_OPCODE 16 - u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE]; - u8 scsi_retries; - u8 scsi_allowed; - u64 fsf_reqid; - u32 fsf_seqno; - u64 fsf_issued; - union { - struct { - u64 fsf_reqid; - u32 fsf_seqno; - u64 fsf_issued; - } new_fsf_req; - struct { - u8 rsp_validity; - u8 rsp_scsi_status; - u32 rsp_resid; - u8 rsp_code; -#define ZFCP_DBF_SCSI_FCP_SNS_INFO 16 -#define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO 256 - u32 sns_info_len; - u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO]; - } fcp; - } type; -} __attribute__ ((packed)); - -/* - * FC-FS stuff - */ -#define R_A_TOV 10 /* seconds */ -#define ZFCP_ELS_TIMEOUT (2 * R_A_TOV) - -#define ZFCP_LS_RLS 0x0f -#define ZFCP_LS_ADISC 0x52 -#define ZFCP_LS_RPS 0x56 -#define ZFCP_LS_RSCN 0x61 -#define ZFCP_LS_RNID 0x78 - -struct zfcp_ls_rjt_par { - u8 action; - u8 reason_code; - u8 reason_expl; - u8 vendor_unique; -} __attribute__ ((packed)); - -struct zfcp_ls_adisc { - u8 code; - u8 field[3]; - u32 hard_nport_id; - u64 wwpn; - u64 wwnn; - u32 nport_id; -} __attribute__ ((packed)); - -struct zfcp_ls_adisc_acc { - u8 code; - u8 field[3]; - u32 hard_nport_id; - u64 wwpn; - u64 wwnn; - u32 nport_id; -} __attribute__ ((packed)); - -struct zfcp_rc_entry { - u8 code; - const char *description; -}; - -/* - * FC-GS-2 stuff - */ -#define ZFCP_CT_REVISION 0x01 -#define ZFCP_CT_DIRECTORY_SERVICE 0xFC -#define ZFCP_CT_NAME_SERVER 0x02 -#define ZFCP_CT_SYNCHRONOUS 0x00 -#define ZFCP_CT_GID_PN 0x0121 -#define ZFCP_CT_MAX_SIZE 0x1020 -#define ZFCP_CT_ACCEPT 0x8002 -#define ZFCP_CT_REJECT 0x8001 - -/* - * FC-GS-4 stuff - */ -#define ZFCP_CT_TIMEOUT (3 * R_A_TOV) - -/******************** 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" - -/* read-only LUN sharing switch initial value */ -#define ZFCP_RO_LUN_SHARING_DEFAULTS 0 - -/* 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...) -#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...) -#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...) -#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...) -#else -# define ZFCP_LOG_TRACE(fmt, args...) \ - ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args) -#endif +#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ -/* - * Note, the leftmost status byte is common among adapter, port +/* + * Note, the leftmost status byte is common among adapter, port * and unit */ #define ZFCP_COMMON_FLAGS 0xfff00000 -#define ZFCP_SPECIFIC_FLAGS 0x000fffff /* 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 +#define ZFCP_STATUS_COMMON_NOESC 0x00200000 /* adapter status */ +#define ZFCP_STATUS_ADAPTER_MB_ACT 0x00000001 #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 -#define ZFCP_STATUS_ADAPTER_REGISTERED 0x00000004 +#define ZFCP_STATUS_ADAPTER_SIOSL_ISSUED 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_SUSPENDED 0x00000040 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 -#define ZFCP_STATUS_ADAPTER_XPORT_OK 0x00000800 - -#define ZFCP_STATUS_ADAPTER_SCSI_UP \ - (ZFCP_STATUS_COMMON_UNBLOCKED | \ - ZFCP_STATUS_ADAPTER_REGISTERED) - - -/* 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 +#define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED 0x00000400 /* 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 -#define ZFCP_STATUS_PORT_ACCESS_DENIED 0x00000040 - -/* 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_PORT_LINK_TEST 0x00000002 /* 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 - * @timer: timer (e.g. for request initiated by erp) - * @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 timer_list *timer; - 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 - * @timer: timer (e.g. for request initiated by erp) - * @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 timer_list *timer; - 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 */ + mempool_t *erp_req; + mempool_t *gid_pn_req; + mempool_t *scsi_req; + mempool_t *scsi_abort; + mempool_t *status_read_req; + mempool_t *sr_data; + mempool_t *gid_pn; + mempool_t *qtcb_pool; }; struct zfcp_erp_action { @@ -898,60 +115,63 @@ struct zfcp_erp_action { 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 */ + struct scsi_device *sdev; + 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 */ + unsigned long fsf_req_id; struct timer_list timer; }; +struct fsf_latency_record { + u32 min; + u32 max; + u64 sum; +}; + +struct latency_cont { + struct fsf_latency_record channel; + struct fsf_latency_record fabric; + u64 counter; +}; + +struct zfcp_latencies { + struct latency_cont read; + struct latency_cont write; + struct latency_cont cmd; + spinlock_t lock; +}; 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 */ + struct kref ref; + u64 peer_wwnn; /* P2P peer WWNN */ + u64 peer_wwpn; /* P2P peer WWPN */ u32 peer_d_id; /* P2P peer D_ID */ - wwn_t physical_wwpn; /* WWPN of physical port */ - u32 physical_s_id; /* local FC port ID */ struct ccw_device *ccw_device; /* S/390 ccw device */ - u8 fc_service_class; + struct zfcp_qdio *qdio; 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 */ + u16 timer_ticks; /* time int for a tick */ struct Scsi_Host *scsi_host; /* Pointer to mid-layer */ - unsigned short scsi_host_no; /* Assigned host number */ - unsigned char name[9]; - 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 */ - struct timer_list scsi_er_timer; /* SCSI err recovery watch */ - struct list_head fsf_req_list_head; /* head of FSF req list */ - spinlock_t fsf_req_list_lock; /* lock for ops on list of - FSF requests */ - atomic_t fsf_reqs_active; /* # active FSF reqs */ - struct zfcp_qdio_queue request_queue; /* request queue */ + struct list_head port_list; /* remote port list */ + rwlock_t port_list_lock; /* port list lock */ + unsigned long req_no; /* unique FSF req number */ + struct zfcp_reqlist *req_list; 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 stat_miss; /* # missing status reads*/ + unsigned int stat_read_buf_num; + struct work_struct stat_work; atomic_t status; /* status of this adapter */ struct list_head erp_ready_head; /* error recovery for this adapter/devices */ + wait_queue_head_t erp_ready_wq; 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; @@ -959,239 +179,144 @@ struct zfcp_adapter { 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 task_struct *erp_thread; + struct zfcp_fc_wka_ports *gs; /* generic services */ + struct zfcp_dbf *dbf; /* debug traces */ 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; + struct work_struct scan_work; + struct work_struct ns_up_work; + struct service_level service_level; + struct workqueue_struct *work_queue; + struct device_dma_parameters dma_parms; + struct zfcp_fc_events events; }; -/* - * 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 device dev; 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 */ + struct list_head unit_list; /* head of logical unit list */ + rwlock_t unit_list_lock; /* unit list lock */ + atomic_t units; /* zfcp_unit count */ atomic_t status; /* status of this remote port */ - wwn_t wwnn; /* WWNN if known */ - wwn_t wwpn; /* WWPN */ + u64 wwnn; /* WWNN if known */ + u64 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; + struct work_struct gid_pn_work; + struct work_struct test_link_work; + struct work_struct rport_work; + enum { RPORT_NONE, RPORT_ADD, RPORT_DEL } rport_task; + unsigned int starget_id; }; -/* 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 - LUN configured via zfcp sysfs + * @dev: struct device for sysfs representation and reference counting + * @list: entry in LUN/unit list per zfcp_port + * @port: reference to zfcp_port where this LUN is configured + * @fcp_lun: 64 bit LUN value + * @scsi_work: for running scsi_scan_target + * + * This is the representation of a LUN that has been configured for + * usage. The main data here is the 64 bit LUN value, data for + * running I/O and recovery is in struct zfcp_scsi_dev. */ 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 */ - scsi_lun_t 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 */ - 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 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; - 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 */ - rwlock_t status_read_lock; /* for status read thread */ - struct list_head status_read_receive_head; - struct list_head status_read_send_head; - struct semaphore status_read_sema; - wait_queue_head_t status_read_thread_wqh; - 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 device dev; + struct list_head list; + struct zfcp_port *port; + u64 fcp_lun; + struct work_struct scsi_work; }; /** - * 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_scsi_dev - zfcp data per SCSI device + * @status: zfcp internal status flags + * @lun_handle: handle from "open lun" for issuing FSF requests + * @erp_action: zfcp erp data for opening and recovering this LUN + * @erp_counter: zfcp erp counter for this LUN + * @latencies: FSF channel and fabric latencies + * @port: zfcp_port where this LUN belongs to */ -struct zfcp_sg_list { - struct scatterlist *sg; - unsigned int count; +struct zfcp_scsi_dev { + atomic_t status; + u32 lun_handle; + struct zfcp_erp_action erp_action; + atomic_t erp_counter; + struct zfcp_latencies latencies; + struct zfcp_port *port; }; -/* 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_pool_element { - struct zfcp_fsf_req fsf_req; - struct fsf_qtcb qtcb; -}; - -/********************** ZFCP SPECIFIC DEFINES ********************************/ - -#define ZFCP_FSFREQ_CLEANUP_TIMEOUT HZ/10 - -#define ZFCP_KNOWN 0x00000001 -#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 - -#define ZFCP_INTERRUPTIBLE 1 -#define ZFCP_UNINTERRUPTIBLE 0 - -#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 +/** + * sdev_to_zfcp - Access zfcp LUN data for SCSI device + * @sdev: scsi_device where to get the zfcp_scsi_dev pointer */ - -static inline void -zfcp_unit_get(struct zfcp_unit *unit) +static inline struct zfcp_scsi_dev *sdev_to_zfcp(struct scsi_device *sdev) { - atomic_inc(&unit->refcount); + return scsi_transport_device_data(sdev); } -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) +/** + * zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN + * @sdev: SCSI device where to get the LUN from + */ +static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev) { - wait_event(port->remove_wq, atomic_read(&port->refcount) == 0); -} + u64 fcp_lun; -static inline void -zfcp_adapter_get(struct zfcp_adapter *adapter) -{ - atomic_inc(&adapter->refcount); + int_to_scsilun(sdev->lun, (struct scsi_lun *)&fcp_lun); + return fcp_lun; } -static inline void -zfcp_adapter_put(struct zfcp_adapter *adapter) -{ - if (atomic_dec_return(&adapter->refcount) == 0) - wake_up(&adapter->remove_wq); -} +/** + * struct zfcp_fsf_req - basic FSF request structure + * @list: list of FSF requests + * @req_id: unique request ID + * @adapter: adapter this request belongs to + * @qdio_req: qdio queue related values + * @completion: used to signal the completion of the request + * @status: status of the request + * @fsf_command: FSF command issued + * @qtcb: associated QTCB + * @seq_no: sequence number of this request + * @data: private data + * @timer: timer data of this request + * @erp_action: reference to erp action if request issued on behalf of ERP + * @pool: reference to memory pool if used for this request + * @issued: time when request was send (STCK) + * @handler: handler which should be called to process response + */ +struct zfcp_fsf_req { + struct list_head list; + unsigned long req_id; + struct zfcp_adapter *adapter; + struct zfcp_qdio_req qdio_req; + struct completion completion; + u32 status; + u32 fsf_command; + struct fsf_qtcb *qtcb; + u32 seq_no; + void *data; + struct timer_list timer; + struct zfcp_erp_action *erp_action; + mempool_t *pool; + unsigned long long issued; + void (*handler)(struct zfcp_fsf_req *); +}; -static inline void -zfcp_adapter_wait(struct zfcp_adapter *adapter) +static inline +int zfcp_adapter_multi_buffer_active(struct zfcp_adapter *adapter) { - wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); + return atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_MB_ACT; } #endif /* ZFCP_DEF_H */ |