/* * zfcp device driver * * Global definitions for the zfcp device driver. * * Copyright IBM Corp. 2002, 2010 */ #ifndef ZFCP_DEF_H #define ZFCP_DEF_H /*************************** INCLUDES *****************************************/ #include <linux/init.h> #include <linux/moduleparam.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> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_fc.h> #include <scsi/scsi_bsg_fc.h> #include <asm/ccwdev.h> #include <asm/debug.h> #include <asm/ebcdic.h> #include <asm/sysinfo.h> #include "zfcp_fsf.h" #include "zfcp_fc.h" #include "zfcp_qdio.h" struct zfcp_reqlist; /********************* SCSI SPECIFIC DEFINES *********************************/ #define ZFCP_SCSI_ER_TIMEOUT (10*HZ) /********************* FSF SPECIFIC DEFINES *********************************/ /* ATTENTION: value must not be used by hardware */ #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 /* timeout value for "default timer" for fsf requests */ #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 * and unit */ #define ZFCP_COMMON_FLAGS 0xfff00000 /* common status bits */ #define ZFCP_STATUS_COMMON_RUNNING 0x40000000 #define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000 #define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000 #define ZFCP_STATUS_COMMON_OPEN 0x04000000 #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_SIOSL_ISSUED 0x00000004 #define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008 #define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010 #define ZFCP_STATUS_ADAPTER_SUSPENDED 0x00000040 #define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100 #define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200 #define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED 0x00000400 /* remote port status */ #define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001 #define ZFCP_STATUS_PORT_LINK_TEST 0x00000002 /* FSF request status (this does not have a common part) */ #define ZFCP_STATUS_FSFREQ_ERROR 0x00000008 #define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010 #define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040 #define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080 #define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200 #define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000 /************************* STRUCTURE DEFINITIONS *****************************/ struct zfcp_fsf_req; /* holds various memory pools of an adapter */ struct zfcp_adapter_mempool { 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 { struct list_head list; int action; /* requested action code */ struct zfcp_adapter *adapter; /* device which should be recovered */ struct zfcp_port *port; struct scsi_device *sdev; u32 status; /* recovery status */ u32 step; /* active step of this erp 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 kref ref; u64 peer_wwnn; /* P2P peer WWNN */ u64 peer_wwpn; /* P2P peer WWPN */ u32 peer_d_id; /* P2P peer D_ID */ struct ccw_device *ccw_device; /* S/390 ccw device */ 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 */ 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 */ rwlock_t abort_lock; /* Protects against SCSI stack abort/command completion races */ 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; 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 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 fc_host_statistics *fc_stats; struct fsf_qtcb_bottom_port *stats_reset_data; unsigned long stats_reset; struct delayed_work 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; unsigned long next_port_scan; }; struct zfcp_port { struct device dev; struct fc_rport *rport; /* rport of fc transport class */ struct list_head list; /* list of remote ports */ struct zfcp_adapter *adapter; /* adapter used to access port */ 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 */ 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; }; /** * 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 dev; struct list_head list; struct zfcp_port *port; u64 fcp_lun; struct work_struct scsi_work; }; /** * 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_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; }; /** * sdev_to_zfcp - Access zfcp LUN data for SCSI device * @sdev: scsi_device where to get the zfcp_scsi_dev pointer */
static inline struct zfcp_scsi_dev *sdev_to_zfcp(struct scsi_device *sdev) { return scsi_transport_device_data(sdev); }Contributors
| Person | Tokens | Prop | Commits | CommitProp | |
| christof schmitt | christof schmitt | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| christof schmitt | christof schmitt | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| swen schillig | swen schillig | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| martin schwidefsky | martin schwidefsky | 340 | 39.13% | 5 | 7.69% |
| christof schmitt | christof schmitt | 227 | 26.12% | 23 | 35.38% |
| swen schillig | swen schillig | 115 | 13.23% | 15 | 23.08% |
| andrew morton | andrew morton | 67 | 7.71% | 2 | 3.08% |
| andreas herrmann | andreas herrmann | 33 | 3.80% | 7 | 10.77% |
| sven schuetz | sven schuetz | 19 | 2.19% | 2 | 3.08% |
| heiko carstens | heiko carstens | 18 | 2.07% | 2 | 3.08% |
| maxim shchetynin | maxim shchetynin | 12 | 1.38% | 2 | 3.08% |
| james bottomley | james bottomley | 9 | 1.04% | 1 | 1.54% |
| steffen maier | steffen maier | 8 | 0.92% | 2 | 3.08% |
| volker sameske | volker sameske | 7 | 0.81% | 1 | 1.54% |
| ralph wuerthner | ralph wuerthner | 6 | 0.69% | 1 | 1.54% |
| martin peschke | martin peschke | 5 | 0.58% | 1 | 1.54% |
| fujita tomonori | fujita tomonori | 3 | 0.35% | 1 | 1.54% |
| Total | 869 | 100.00% | 65 | 100.00% |