diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_def.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 612 |
1 files changed, 127 insertions, 485 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 510662783a6..d91173f326c 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -3,7 +3,7 @@ * * Global definitions for the zfcp device driver. * - * Copyright IBM Corporation 2002, 2008 + * Copyright IBM Corp. 2002, 2010 */ #ifndef ZFCP_DEF_H @@ -22,6 +22,8 @@ #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> @@ -29,46 +31,20 @@ #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/qdio.h> #include <asm/debug.h> #include <asm/ebcdic.h> #include <asm/sysinfo.h> -#include "zfcp_dbf.h" #include "zfcp_fsf.h" +#include "zfcp_fc.h" +#include "zfcp_qdio.h" - -/********************* GENERAL DEFINES *********************************/ - -#define REQUEST_LIST_SIZE 128 +struct zfcp_reqlist; /********************* SCSI SPECIFIC DEFINES *********************************/ #define ZFCP_SCSI_ER_TIMEOUT (10*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 - -/* 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 \ - (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) - /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ - -#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8) - /* max. number of (data buffer) SBALEs in largest SBAL chain - multiplied with number of sectors per 4k block */ - /********************* FSF SPECIFIC DEFINES *********************************/ /* ATTENTION: value must not be used by hardware */ @@ -77,134 +53,6 @@ /* timeout value for "default timer" for fsf requests */ #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ) -/*************** FIBRE CHANNEL PROTOCOL SPECIFIC DEFINES ********************/ - -/* timeout for name-server lookup (in seconds) */ -#define ZFCP_NS_GID_PN_TIMEOUT 10 - -/* 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 { - u64 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_RSCN 0x61 -#define LS_LOGO 0x05 -#define LS_PLOGI 0x03 - -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)); - -/* see fc-ph */ -struct fcp_logo { - u32 command; - u32 nport_did; - u64 nport_wwpn; -} __attribute__((packed)); - -/* - * FC-FS stuff - */ -#define R_A_TOV 10 /* seconds */ - -#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_adisc { - u8 code; - u8 field[3]; - u32 hard_nport_id; - u64 wwpn; - u64 wwnn; - u32 nport_id; -} __attribute__ ((packed)); - -/* - * 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_SCSI_FCP 0x08 -#define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09 -#define ZFCP_CT_GID_PN 0x0121 -#define ZFCP_CT_GPN_FT 0x0172 -#define ZFCP_CT_ACCEPT 0x8002 -#define ZFCP_CT_REJECT 0x8001 - -/* - * FC-GS-4 stuff - */ -#define ZFCP_CT_TIMEOUT (3 * R_A_TOV) - /*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/ /* @@ -214,7 +62,6 @@ struct zfcp_ls_adisc { #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 @@ -225,53 +72,26 @@ struct zfcp_ls_adisc { #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_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 - -/* FC-PH/FC-GS well-known address identifiers for generic services */ -#define ZFCP_DID_WKA 0xFFFFF0 -#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_PHYS_CLOSING 0x00000004 -#define ZFCP_STATUS_PORT_NO_WWPN 0x00000008 -#define ZFCP_STATUS_PORT_INVALID_WWPN 0x00000020 - -/* well known address (WKA) port status*/ -enum zfcp_wka_status { - ZFCP_WKA_PORT_OFFLINE, - ZFCP_WKA_PORT_CLOSING, - ZFCP_WKA_PORT_OPENING, - ZFCP_WKA_PORT_ONLINE, -}; - -/* logical unit status */ -#define ZFCP_STATUS_UNIT_SHARED 0x00000004 -#define ZFCP_STATUS_UNIT_READONLY 0x00000008 -#define ZFCP_STATUS_UNIT_REGISTERED 0x00000010 -#define ZFCP_STATUS_UNIT_SCSI_WORK_PENDING 0x00000020 +#define ZFCP_STATUS_PORT_LINK_TEST 0x00000002 /* FSF request status (this does not have a common part) */ -#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_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 /************************* STRUCTURE DEFINITIONS *****************************/ @@ -280,118 +100,14 @@ 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; - u64 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)); - -/** - * struct zfcp_send_ct - used to pass parameters to function zfcp_fsf_send_ct - * @wka_port: port where the request is sent to - * @req: scatter-gather list for request - * @resp: scatter-gather list for response - * @handler: handler function (called for response to the request) - * @handler_data: data passed to handler function - * @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_wka_port *wka_port; - struct scatterlist *req; - struct scatterlist *resp; - void (*handler)(unsigned long); - unsigned long handler_data; - 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; -}; - -/** - * 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 - * @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; - void (*handler)(unsigned long); - unsigned long handler_data; - struct completion *completion; - int ls_code; - int status; -}; - -struct zfcp_wka_port { - struct zfcp_adapter *adapter; - wait_queue_head_t completion_wq; - enum zfcp_wka_status status; - atomic_t refcount; - u32 d_id; - u32 handle; - struct mutex mutex; - struct delayed_work work; -}; - -struct zfcp_qdio_queue { - struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q]; - u8 first; /* index of next free bfr in queue */ - atomic_t count; /* number of free buffers in queue */ + 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 { @@ -399,11 +115,10 @@ 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; + 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; }; @@ -427,13 +142,12 @@ struct zfcp_latencies { }; struct zfcp_adapter { - atomic_t refcount; /* reference count */ - wait_queue_head_t remove_wq; /* can be used to wait for - refcount drop to zero */ + 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 */ @@ -441,30 +155,23 @@ struct zfcp_adapter { 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_head; /* remote port list */ + 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 list_head *req_list; /* list of pending reqs */ - spinlock_t req_list_lock; /* request list lock */ - struct zfcp_qdio_queue req_q; /* request queue */ - spinlock_t req_q_lock; /* for operations on queue */ - int req_q_pci_batch; /* SBALs since PCI indication - was last set */ + 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 resp_q; /* response queue */ 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; - 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; @@ -472,38 +179,29 @@ struct zfcp_adapter { actions */ u32 erp_low_mem_count; /* nr of erp actions waiting for memory */ - struct zfcp_wka_port nsp; /* adapter's nameserver */ - debug_info_t *rec_dbf; - debug_info_t *hba_dbf; - debug_info_t *san_dbf; /* debug feature areas */ - debug_info_t *scsi_dbf; - spinlock_t rec_dbf_lock; - spinlock_t hba_dbf_lock; - spinlock_t san_dbf_lock; - spinlock_t scsi_dbf_lock; - struct zfcp_rec_dbf_record rec_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 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; - atomic_t qdio_outb_full; /* queue full incidents */ + struct workqueue_struct *work_queue; + struct device_dma_parameters dma_parms; + struct zfcp_fc_events events; }; 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_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 */ @@ -514,167 +212,111 @@ struct zfcp_port { 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 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 */ - u64 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; - struct zfcp_latencies latencies; -}; - -/* 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 SBAL for this request */ - u8 sbal_limit; /* last possible SBAL for - this reuest */ - u8 sbale_curr; /* current SBALE during creation - of request */ - u8 sbal_response; /* SBAL used in interrupt */ - wait_queue_head_t completion_wq; /* can be used by a routine - to wait for completion */ - 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 */ - void *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; - void (*handler)(struct zfcp_fsf_req *); - u16 qdio_outb_usage;/* usage of outbound queue */ - u16 qdio_inb_usage; /* usage of inbound queue */ + struct device dev; + struct list_head list; + struct zfcp_port *port; + u64 fcp_lun; + struct work_struct scsi_work; }; -/* driver data */ -struct zfcp_data { - struct scsi_host_template scsi_host_template; - struct scsi_transport_template *scsi_transport_template; - rwlock_t config_lock; /* serialises changes - to adapter/port/unit - lists */ - struct semaphore config_sema; /* serialises configuration - changes */ - struct kmem_cache *fsf_req_qtcb_cache; - struct kmem_cache *sr_buffer_cache; - struct kmem_cache *gid_pn_cache; - struct workqueue_struct *work_queue; -}; - -/* struct used by memory pools for fsf_requests */ -struct zfcp_fsf_req_qtcb { - struct zfcp_fsf_req fsf_req; - struct fsf_qtcb qtcb; +/** + * 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; }; -/********************** ZFCP SPECIFIC DEFINES ********************************/ - -#define ZFCP_REQ_AUTO_CLEANUP 0x00000002 -#define ZFCP_REQ_NO_QTCB 0x00000008 - -#define ZFCP_SET 0x00000100 -#define ZFCP_CLEAR 0x00000200 - -/* - * Helper functions for request ID management. +/** + * sdev_to_zfcp - Access zfcp LUN data for SCSI device + * @sdev: scsi_device where to get the zfcp_scsi_dev pointer */ -static inline int zfcp_reqlist_hash(unsigned long req_id) -{ - return req_id % REQUEST_LIST_SIZE; -} - -static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter, - struct zfcp_fsf_req *fsf_req) +static inline struct zfcp_scsi_dev *sdev_to_zfcp(struct scsi_device *sdev) { - list_del(&fsf_req->list); + return scsi_transport_device_data(sdev); } -static inline struct zfcp_fsf_req * -zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id) -{ - struct zfcp_fsf_req *request; - unsigned int idx; - - idx = zfcp_reqlist_hash(req_id); - list_for_each_entry(request, &adapter->req_list[idx], list) - if (request->req_id == req_id) - return request; - return NULL; -} - -static inline struct zfcp_fsf_req * -zfcp_reqlist_find_safe(struct zfcp_adapter *adapter, struct zfcp_fsf_req *req) -{ - struct zfcp_fsf_req *request; - unsigned int idx; - - for (idx = 0; idx < REQUEST_LIST_SIZE; idx++) { - list_for_each_entry(request, &adapter->req_list[idx], list) - if (request == req) - return request; - } - return NULL; -} - -/* - * functions needed for reference/usage counting +/** + * zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN + * @sdev: SCSI device where to get the LUN from */ - -static inline void -zfcp_unit_get(struct zfcp_unit *unit) +static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev) { - atomic_inc(&unit->refcount); -} + u64 fcp_lun; -static inline void -zfcp_unit_put(struct zfcp_unit *unit) -{ - if (atomic_dec_return(&unit->refcount) == 0) - wake_up(&unit->remove_wq); + int_to_scsilun(sdev->lun, (struct scsi_lun *)&fcp_lun); + return fcp_lun; } -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_adapter_get(struct zfcp_adapter *adapter) -{ - atomic_inc(&adapter->refcount); -} +/** + * 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_put(struct zfcp_adapter *adapter) +static inline +int zfcp_adapter_multi_buffer_active(struct zfcp_adapter *adapter) { - if (atomic_dec_return(&adapter->refcount) == 0) - wake_up(&adapter->remove_wq); + return atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_MB_ACT; } #endif /* ZFCP_DEF_H */ |