1a61127c2SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 242e9a92fSRobert Love /* 342e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 442e9a92fSRobert Love * 542e9a92fSRobert Love * Maintained at www.Open-FCoE.org 642e9a92fSRobert Love */ 742e9a92fSRobert Love 842e9a92fSRobert Love #ifndef _LIBFC_H_ 942e9a92fSRobert Love #define _LIBFC_H_ 1042e9a92fSRobert Love 1142e9a92fSRobert Love #include <linux/timer.h> 1242e9a92fSRobert Love #include <linux/if.h> 13582b45bcSRobert Love #include <linux/percpu.h> 1422c70d1aSElena Reshetova #include <linux/refcount.h> 1542e9a92fSRobert Love 1642e9a92fSRobert Love #include <scsi/scsi_transport.h> 1742e9a92fSRobert Love #include <scsi/scsi_transport_fc.h> 18a51ab396SSteve Ma #include <scsi/scsi_bsg_fc.h> 1942e9a92fSRobert Love 2042e9a92fSRobert Love #include <scsi/fc/fc_fcp.h> 2142e9a92fSRobert Love #include <scsi/fc/fc_ns.h> 22d78c317fSNeerav Parikh #include <scsi/fc/fc_ms.h> 2342e9a92fSRobert Love #include <scsi/fc/fc_els.h> 2442e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 2542e9a92fSRobert Love 2642e9a92fSRobert Love #include <scsi/fc_frame.h> 2742e9a92fSRobert Love 2896ad8464SJoe Eykholt #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */ 2996ad8464SJoe Eykholt 3042e9a92fSRobert Love /* 3142e9a92fSRobert Love * libfc error codes 3242e9a92fSRobert Love */ 3342e9a92fSRobert Love #define FC_NO_ERR 0 /* no error */ 3442e9a92fSRobert Love #define FC_EX_TIMEOUT 1 /* Exchange timeout */ 3542e9a92fSRobert Love #define FC_EX_CLOSED 2 /* Exchange closed */ 369f9504a7SHannes Reinecke #define FC_EX_ALLOC_ERR 3 /* Exchange allocation failed */ 379f9504a7SHannes Reinecke #define FC_EX_XMIT_ERR 4 /* Exchange transmit failed */ 389f9504a7SHannes Reinecke #define FC_EX_ELS_RJT 5 /* ELS rejected */ 399f9504a7SHannes Reinecke #define FC_EX_INV_LOGIN 6 /* Login not completed */ 409f9504a7SHannes Reinecke #define FC_EX_SEQ_ERR 6 /* Exchange sequence error */ 4142e9a92fSRobert Love 423a3b42bfSRobert Love /** 433a3b42bfSRobert Love * enum fc_lport_state - Local port states 443a3b42bfSRobert Love * @LPORT_ST_DISABLED: Disabled 453a3b42bfSRobert Love * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent 463a3b42bfSRobert Love * @LPORT_ST_DNS: Waiting for name server remote port to become ready 473a3b42bfSRobert Love * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent 483a3b42bfSRobert Love * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent 49ab593b18SJoe Eykholt * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent 50d78c317fSNeerav Parikh * @LPORT_ST_FDMI: Waiting for mgmt server rport to become ready 51d78c317fSNeerav Parikh * @LPORT_ST_RHBA: 523a3b42bfSRobert Love * @LPORT_ST_SCR: State Change Register (SCR) sent 533a3b42bfSRobert Love * @LPORT_ST_READY: Ready for use 543a3b42bfSRobert Love * @LPORT_ST_LOGO: Local port logout (LOGO) sent 553a3b42bfSRobert Love * @LPORT_ST_RESET: Local port reset 5642e9a92fSRobert Love */ 5742e9a92fSRobert Love enum fc_lport_state { 58b1d9fd55SJoe Eykholt LPORT_ST_DISABLED = 0, 5942e9a92fSRobert Love LPORT_ST_FLOGI, 6042e9a92fSRobert Love LPORT_ST_DNS, 61c9c7bd7aSChris Leech LPORT_ST_RNN_ID, 625baa17c3SChris Leech LPORT_ST_RSNN_NN, 63c9866a54SChris Leech LPORT_ST_RSPN_ID, 6442e9a92fSRobert Love LPORT_ST_RFT_ID, 65ab593b18SJoe Eykholt LPORT_ST_RFF_ID, 66d78c317fSNeerav Parikh LPORT_ST_FDMI, 67d78c317fSNeerav Parikh LPORT_ST_RHBA, 68d78c317fSNeerav Parikh LPORT_ST_RPA, 69d78c317fSNeerav Parikh LPORT_ST_DHBA, 70d78c317fSNeerav Parikh LPORT_ST_DPRT, 7142e9a92fSRobert Love LPORT_ST_SCR, 7242e9a92fSRobert Love LPORT_ST_READY, 7342e9a92fSRobert Love LPORT_ST_LOGO, 7442e9a92fSRobert Love LPORT_ST_RESET 7542e9a92fSRobert Love }; 7642e9a92fSRobert Love 7742e9a92fSRobert Love enum fc_disc_event { 7842e9a92fSRobert Love DISC_EV_NONE = 0, 7942e9a92fSRobert Love DISC_EV_SUCCESS, 8042e9a92fSRobert Love DISC_EV_FAILED 8142e9a92fSRobert Love }; 8242e9a92fSRobert Love 833a3b42bfSRobert Love /** 843a3b42bfSRobert Love * enum fc_rport_state - Remote port states 853a3b42bfSRobert Love * @RPORT_ST_INIT: Initialized 86a7b12a27SJoe Eykholt * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint 87a7b12a27SJoe Eykholt * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint 883a3b42bfSRobert Love * @RPORT_ST_PLOGI: Waiting for PLOGI completion 893a3b42bfSRobert Love * @RPORT_ST_PRLI: Waiting for PRLI completion 903a3b42bfSRobert Love * @RPORT_ST_RTV: Waiting for RTV completion 913a3b42bfSRobert Love * @RPORT_ST_READY: Ready for use 923a3b42bfSRobert Love * @RPORT_ST_ADISC: Discover Address sent 933a3b42bfSRobert Love * @RPORT_ST_DELETE: Remote port being deleted 943a3b42bfSRobert Love */ 9542e9a92fSRobert Love enum fc_rport_state { 963a3b42bfSRobert Love RPORT_ST_INIT, 97a7b12a27SJoe Eykholt RPORT_ST_FLOGI, 98a7b12a27SJoe Eykholt RPORT_ST_PLOGI_WAIT, 993a3b42bfSRobert Love RPORT_ST_PLOGI, 1003a3b42bfSRobert Love RPORT_ST_PRLI, 1013a3b42bfSRobert Love RPORT_ST_RTV, 1023a3b42bfSRobert Love RPORT_ST_READY, 1033a3b42bfSRobert Love RPORT_ST_ADISC, 1043a3b42bfSRobert Love RPORT_ST_DELETE, 10542e9a92fSRobert Love }; 10642e9a92fSRobert Love 10742e9a92fSRobert Love /** 10842e9a92fSRobert Love * struct fc_disc_port - temporary discovery port to hold rport identifiers 10942e9a92fSRobert Love * @lp: Fibre Channel host port instance 1109737e6a7SRobert Love * @peers: Node for list management during discovery and RSCN processing 1119737e6a7SRobert Love * @rport_work: Work struct for starting the rport state machine 1129737e6a7SRobert Love * @port_id: Port ID of the discovered port 11342e9a92fSRobert Love */ 11442e9a92fSRobert Love struct fc_disc_port { 11542e9a92fSRobert Love struct fc_lport *lp; 11642e9a92fSRobert Love struct list_head peers; 11742e9a92fSRobert Love struct work_struct rport_work; 1189737e6a7SRobert Love u32 port_id; 11942e9a92fSRobert Love }; 12042e9a92fSRobert Love 1213a3b42bfSRobert Love /** 1223a3b42bfSRobert Love * enum fc_rport_event - Remote port events 1233a3b42bfSRobert Love * @RPORT_EV_NONE: No event 1243a3b42bfSRobert Love * @RPORT_EV_READY: Remote port is ready for use 1253a3b42bfSRobert Love * @RPORT_EV_FAILED: State machine failed, remote port is not ready 1263a3b42bfSRobert Love * @RPORT_EV_STOP: Remote port has been stopped 1273a3b42bfSRobert Love * @RPORT_EV_LOGO: Remote port logout (LOGO) sent 1283a3b42bfSRobert Love */ 12942e9a92fSRobert Love enum fc_rport_event { 13042e9a92fSRobert Love RPORT_EV_NONE = 0, 1314c0f62b5SJoe Eykholt RPORT_EV_READY, 13242e9a92fSRobert Love RPORT_EV_FAILED, 13342e9a92fSRobert Love RPORT_EV_STOP, 13442e9a92fSRobert Love RPORT_EV_LOGO 13542e9a92fSRobert Love }; 13642e9a92fSRobert Love 1379fb9d328SJoe Eykholt struct fc_rport_priv; 1389fb9d328SJoe Eykholt 1393a3b42bfSRobert Love /** 1403a3b42bfSRobert Love * struct fc_rport_operations - Operations for a remote port 1413a3b42bfSRobert Love * @event_callback: Function to be called for remote port events 1423a3b42bfSRobert Love */ 14342e9a92fSRobert Love struct fc_rport_operations { 1449fb9d328SJoe Eykholt void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, 14542e9a92fSRobert Love enum fc_rport_event); 14642e9a92fSRobert Love }; 14742e9a92fSRobert Love 14842e9a92fSRobert Love /** 14942e9a92fSRobert Love * struct fc_rport_libfc_priv - libfc internal information about a remote port 1503a3b42bfSRobert Love * @local_port: The associated local port 1513a3b42bfSRobert Love * @rp_state: Indicates READY for I/O or DELETE when blocked 1529e9d0452SJoe Eykholt * @flags: REC and RETRY supported flags 1533a3b42bfSRobert Love * @e_d_tov: Error detect timeout value (in msec) 1543a3b42bfSRobert Love * @r_a_tov: Resource allocation timeout value (in msec) 1559e9d0452SJoe Eykholt */ 1569e9d0452SJoe Eykholt struct fc_rport_libfc_priv { 1579e9d0452SJoe Eykholt struct fc_lport *local_port; 1589e9d0452SJoe Eykholt enum fc_rport_state rp_state; 1599e9d0452SJoe Eykholt u16 flags; 1609e9d0452SJoe Eykholt #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) 1619e9d0452SJoe Eykholt #define FC_RP_FLAGS_RETRY (1 << 1) 1624b2164d4SJoe Eykholt #define FC_RP_STARTED (1 << 2) 16375a2792dSBhanu Prakash Gollapudi #define FC_RP_FLAGS_CONF_REQ (1 << 3) 1649e9d0452SJoe Eykholt unsigned int e_d_tov; 1659e9d0452SJoe Eykholt unsigned int r_a_tov; 1669e9d0452SJoe Eykholt }; 1679e9d0452SJoe Eykholt 1689e9d0452SJoe Eykholt /** 1693a3b42bfSRobert Love * struct fc_rport_priv - libfc remote port and discovery info 1703a3b42bfSRobert Love * @local_port: The associated local port 1713a3b42bfSRobert Love * @rport: The FC transport remote port 1723a3b42bfSRobert Love * @kref: Reference counter 1733a3b42bfSRobert Love * @rp_state: Enumeration that tracks progress of PLOGI, PRLI, 1743a3b42bfSRobert Love * and RTV exchanges 1753a3b42bfSRobert Love * @ids: The remote port identifiers and roles 1764b2164d4SJoe Eykholt * @flags: STARTED, REC and RETRY_SUPPORTED flags 1773a3b42bfSRobert Love * @max_seq: Maximum number of concurrent sequences 1783a3b42bfSRobert Love * @disc_id: The discovery identifier 1793a3b42bfSRobert Love * @maxframe_size: The maximum frame size 1803a3b42bfSRobert Love * @retries: The retry count for the current state 181f034260dSJoe Eykholt * @major_retries: The retry count for the entire PLOGI/PRLI state machine 1823a3b42bfSRobert Love * @e_d_tov: Error detect timeout value (in msec) 1833a3b42bfSRobert Love * @r_a_tov: Resource allocation timeout value (in msec) 1843a3b42bfSRobert Love * @rp_mutex: The mutex that protects the remote port 1853a3b42bfSRobert Love * @retry_work: Handle for retries 1863a3b42bfSRobert Love * @event_callback: Callback when READY, FAILED or LOGO states complete 18796ad8464SJoe Eykholt * @prli_count: Count of open PRLI sessions in providers 18842e90414SJoe Eykholt * @rcu: Structure used for freeing in an RCU-safe manner 18942e9a92fSRobert Love */ 1909e9d0452SJoe Eykholt struct fc_rport_priv { 19142e9a92fSRobert Love struct fc_lport *local_port; 192f211fa51SJoe Eykholt struct fc_rport *rport; 193f211fa51SJoe Eykholt struct kref kref; 19442e9a92fSRobert Love enum fc_rport_state rp_state; 195f211fa51SJoe Eykholt struct fc_rport_identifiers ids; 19642e9a92fSRobert Love u16 flags; 19742e9a92fSRobert Love u16 max_seq; 1980f6c6149SJoe Eykholt u16 disc_id; 199f211fa51SJoe Eykholt u16 maxframe_size; 20042e9a92fSRobert Love unsigned int retries; 201f034260dSJoe Eykholt unsigned int major_retries; 20242e9a92fSRobert Love unsigned int e_d_tov; 20342e9a92fSRobert Love unsigned int r_a_tov; 20442e9a92fSRobert Love struct mutex rp_mutex; 20542e9a92fSRobert Love struct delayed_work retry_work; 20642e9a92fSRobert Love enum fc_rport_event event; 20742e9a92fSRobert Love struct fc_rport_operations *ops; 20842e9a92fSRobert Love struct list_head peers; 20942e9a92fSRobert Love struct work_struct event_work; 210f211fa51SJoe Eykholt u32 supported_classes; 21196ad8464SJoe Eykholt u16 prli_count; 21242e90414SJoe Eykholt struct rcu_head rcu; 21375a2792dSBhanu Prakash Gollapudi u16 sp_features; 21475a2792dSBhanu Prakash Gollapudi u8 spp_type; 21575a2792dSBhanu Prakash Gollapudi void (*lld_event_callback)(struct fc_lport *, 21675a2792dSBhanu Prakash Gollapudi struct fc_rport_priv *, 21775a2792dSBhanu Prakash Gollapudi enum fc_rport_event); 21842e9a92fSRobert Love }; 21942e9a92fSRobert Love 2203a3b42bfSRobert Love /** 2211bd49b48SVasu Dev * struct fc_stats - fc stats structure 2223a3b42bfSRobert Love * @SecondsSinceLastReset: Seconds since the last reset 2233a3b42bfSRobert Love * @TxFrames: Number of transmitted frames 2243a3b42bfSRobert Love * @TxWords: Number of transmitted words 2253a3b42bfSRobert Love * @RxFrames: Number of received frames 2263a3b42bfSRobert Love * @RxWords: Number of received words 2273a3b42bfSRobert Love * @ErrorFrames: Number of received error frames 2283a3b42bfSRobert Love * @DumpedFrames: Number of dumped frames 2290f02a665SVasu Dev * @FcpPktAllocFails: Number of fcp packet allocation failures 2300f02a665SVasu Dev * @FcpPktAborts: Number of fcp packet aborts 2310f02a665SVasu Dev * @FcpFrameAllocFails: Number of fcp frame allocation failures 2323a3b42bfSRobert Love * @LinkFailureCount: Number of link failures 2333a3b42bfSRobert Love * @LossOfSignalCount: Number for signal losses 2343a3b42bfSRobert Love * @InvalidTxWordCount: Number of invalid transmitted words 2353a3b42bfSRobert Love * @InvalidCRCCount: Number of invalid CRCs 2363a3b42bfSRobert Love * @InputRequests: Number of input requests 2373a3b42bfSRobert Love * @OutputRequests: Number of output requests 2383a3b42bfSRobert Love * @ControlRequests: Number of control requests 2395f0e385fSJoe Eykholt * @InputBytes: Number of received bytes 2405f0e385fSJoe Eykholt * @OutputBytes: Number of transmitted bytes 2416580bbd0SYi Zou * @VLinkFailureCount: Number of virtual link failures 2426580bbd0SYi Zou * @MissDiscAdvCount: Number of missing FIP discovery advertisement 24342e9a92fSRobert Love */ 2441bd49b48SVasu Dev struct fc_stats { 24542e9a92fSRobert Love u64 SecondsSinceLastReset; 24642e9a92fSRobert Love u64 TxFrames; 24742e9a92fSRobert Love u64 TxWords; 24842e9a92fSRobert Love u64 RxFrames; 24942e9a92fSRobert Love u64 RxWords; 25042e9a92fSRobert Love u64 ErrorFrames; 25142e9a92fSRobert Love u64 DumpedFrames; 2520f02a665SVasu Dev u64 FcpPktAllocFails; 2530f02a665SVasu Dev u64 FcpPktAborts; 2540f02a665SVasu Dev u64 FcpFrameAllocFails; 25542e9a92fSRobert Love u64 LinkFailureCount; 25642e9a92fSRobert Love u64 LossOfSignalCount; 25742e9a92fSRobert Love u64 InvalidTxWordCount; 25842e9a92fSRobert Love u64 InvalidCRCCount; 25942e9a92fSRobert Love u64 InputRequests; 26042e9a92fSRobert Love u64 OutputRequests; 26142e9a92fSRobert Love u64 ControlRequests; 2625f0e385fSJoe Eykholt u64 InputBytes; 2635f0e385fSJoe Eykholt u64 OutputBytes; 2646580bbd0SYi Zou u64 VLinkFailureCount; 2656580bbd0SYi Zou u64 MissDiscAdvCount; 26642e9a92fSRobert Love }; 26742e9a92fSRobert Love 2683a3b42bfSRobert Love /** 2693a3b42bfSRobert Love * struct fc_seq_els_data - ELS data used for passing ELS specific responses 2703a3b42bfSRobert Love * @reason: The reason for rejection 27125985edcSLucas De Marchi * @explan: The explanation of the rejection 2723a3b42bfSRobert Love * 2733a3b42bfSRobert Love * Mainly used by the exchange manager layer. 27442e9a92fSRobert Love */ 27542e9a92fSRobert Love struct fc_seq_els_data { 27642e9a92fSRobert Love enum fc_els_rjt_reason reason; 27742e9a92fSRobert Love enum fc_els_rjt_explan explan; 27842e9a92fSRobert Love }; 27942e9a92fSRobert Love 2803a3b42bfSRobert Love /** 2813a3b42bfSRobert Love * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request) 2823a3b42bfSRobert Love * @lp: The associated local port 2833a3b42bfSRobert Love * @state: The state of the I/O 2843a3b42bfSRobert Love * @ref_cnt: Reference count 2853a3b42bfSRobert Love * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the 2863a3b42bfSRobert Love * host_lock if both are to be held at the same time) 2873a3b42bfSRobert Love * @cmd: The SCSI command (set and clear with the host_lock held) 2883a3b42bfSRobert Love * @list: Tracks queued commands (accessed with the host_lock held) 2893a3b42bfSRobert Love * @timer: The command timer 2903a3b42bfSRobert Love * @tm_done: Completion indicator 2913a3b42bfSRobert Love * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies) 2923a3b42bfSRobert Love * @data_len: The length of the data 2933a3b42bfSRobert Love * @cdb_cmd: The CDB command 2943a3b42bfSRobert Love * @xfer_len: The transfer length 2953a3b42bfSRobert Love * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange 2963a3b42bfSRobert Love * will be set here if DDP was setup) 2973a3b42bfSRobert Love * @xfer_contig_end: The offset into the buffer if the buffer is contiguous 2983a3b42bfSRobert Love * (Tx and Rx) 2993a3b42bfSRobert Love * @max_payload: The maximum payload size (in bytes) 3003a3b42bfSRobert Love * @io_status: SCSI result (upper 24 bits) 3013a3b42bfSRobert Love * @cdb_status: CDB status 3023a3b42bfSRobert Love * @status_code: FCP I/O status 3033a3b42bfSRobert Love * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun) 3043a3b42bfSRobert Love * @req_flags: Request flags (bit 0: read bit:1 write) 3053a3b42bfSRobert Love * @scsi_resid: SCSI residule length 3063a3b42bfSRobert Love * @rport: The remote port that the SCSI command is targeted at 3073a3b42bfSRobert Love * @seq_ptr: The sequence that will carry the SCSI command 3083a3b42bfSRobert Love * @recov_retry: Number of recovery retries 3093a3b42bfSRobert Love * @recov_seq: The sequence for REC or SRR 31042e9a92fSRobert Love */ 31142e9a92fSRobert Love struct fc_fcp_pkt { 3123a3b42bfSRobert Love spinlock_t scsi_pkt_lock; 31322c70d1aSElena Reshetova refcount_t ref_cnt; 314ed26cfecSVasu Dev 315ed26cfecSVasu Dev /* SCSI command and data transfer information */ 316ed26cfecSVasu Dev u32 data_len; 3173a3b42bfSRobert Love 3183a3b42bfSRobert Love /* SCSI I/O related information */ 3193a3b42bfSRobert Love struct scsi_cmnd *cmd; 3203a3b42bfSRobert Love struct list_head list; 3213a3b42bfSRobert Love 322ed26cfecSVasu Dev /* Housekeeping information */ 323ed26cfecSVasu Dev struct fc_lport *lp; 324ed26cfecSVasu Dev u8 state; 32542e9a92fSRobert Love 3263a3b42bfSRobert Love /* SCSI/FCP return status */ 32742e9a92fSRobert Love u8 cdb_status; 3283a3b42bfSRobert Love u8 status_code; 32942e9a92fSRobert Love u8 scsi_comp_flags; 330ed26cfecSVasu Dev u32 io_status; 3313a3b42bfSRobert Love u32 req_flags; 3323a3b42bfSRobert Love u32 scsi_resid; 33342e9a92fSRobert Love 334ed26cfecSVasu Dev /* Transport related veriables */ 335ed26cfecSVasu Dev size_t xfer_len; 336ed26cfecSVasu Dev struct fcp_cmnd cdb_cmd; 337ed26cfecSVasu Dev u32 xfer_contig_end; 338ed26cfecSVasu Dev u16 max_payload; 339ed26cfecSVasu Dev u16 xfer_ddp; 340ed26cfecSVasu Dev 3413a3b42bfSRobert Love /* Associated structures */ 3423a3b42bfSRobert Love struct fc_rport *rport; 3433a3b42bfSRobert Love struct fc_seq *seq_ptr; 3443a3b42bfSRobert Love 345ed26cfecSVasu Dev /* Timeout/error related information */ 346ed26cfecSVasu Dev struct timer_list timer; 347ed26cfecSVasu Dev int wait_for_comp; 348ad3120cfSHannes Reinecke int timer_delay; 349ed26cfecSVasu Dev u32 recov_retry; 3503a3b42bfSRobert Love struct fc_seq *recov_seq; 351ed26cfecSVasu Dev struct completion tm_done; 352ed26cfecSVasu Dev } ____cacheline_aligned_in_smp; 35342e9a92fSRobert Love 35442e9a92fSRobert Love /* 35542e9a92fSRobert Love * Structure and function definitions for managing Fibre Channel Exchanges 35642e9a92fSRobert Love * and Sequences 35742e9a92fSRobert Love * 35842e9a92fSRobert Love * fc_exch holds state for one exchange and links to its active sequence. 35942e9a92fSRobert Love * 36042e9a92fSRobert Love * fc_seq holds the state for an individual sequence. 36142e9a92fSRobert Love */ 36242e9a92fSRobert Love 36342e9a92fSRobert Love struct fc_exch_mgr; 36496316099SVasu Dev struct fc_exch_mgr_anchor; 365e4bc50beSVasu Dev extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ 36642e9a92fSRobert Love 3673a3b42bfSRobert Love /** 3683a3b42bfSRobert Love * struct fc_seq - FC sequence 3693a3b42bfSRobert Love * @id: The sequence ID 3703a3b42bfSRobert Love * @ssb_stat: Status flags for the sequence status block (SSB) 3713a3b42bfSRobert Love * @cnt: Number of frames sent so far 3723a3b42bfSRobert Love * @rec_data: FC-4 value for REC 37342e9a92fSRobert Love */ 37442e9a92fSRobert Love struct fc_seq { 3753a3b42bfSRobert Love u8 id; 3763a3b42bfSRobert Love u16 ssb_stat; 3773a3b42bfSRobert Love u16 cnt; 3783a3b42bfSRobert Love u32 rec_data; 37942e9a92fSRobert Love }; 38042e9a92fSRobert Love 38142e9a92fSRobert Love #define FC_EX_DONE (1 << 0) /* ep is completed */ 38242e9a92fSRobert Love #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ 3839ca1e182SHannes Reinecke #define FC_EX_QUARANTINE (1 << 2) /* exch is quarantined */ 38442e9a92fSRobert Love 3853a3b42bfSRobert Love /** 3863a3b42bfSRobert Love * struct fc_exch - Fibre Channel Exchange 3873a3b42bfSRobert Love * @em: Exchange manager 3883a3b42bfSRobert Love * @pool: Exchange pool 3893a3b42bfSRobert Love * @state: The exchange's state 3903a3b42bfSRobert Love * @xid: The exchange ID 3913a3b42bfSRobert Love * @ex_list: Handle used by the EM to track free exchanges 3923a3b42bfSRobert Love * @ex_lock: Lock that protects the exchange 3933a3b42bfSRobert Love * @ex_refcnt: Reference count 3943a3b42bfSRobert Love * @timeout_work: Handle for timeout handler 3953a3b42bfSRobert Love * @lp: The local port that this exchange is on 3963a3b42bfSRobert Love * @oxid: Originator's exchange ID 3973a3b42bfSRobert Love * @rxid: Responder's exchange ID 3983a3b42bfSRobert Love * @oid: Originator's FCID 3993a3b42bfSRobert Love * @sid: Source FCID 4003a3b42bfSRobert Love * @did: Destination FCID 4013a3b42bfSRobert Love * @esb_stat: ESB exchange status 4023a3b42bfSRobert Love * @r_a_tov: Resouce allocation time out value (in msecs) 4033a3b42bfSRobert Love * @seq_id: The next sequence ID to use 404f60e12e9SJoe Eykholt * @encaps: encapsulation information for lower-level driver 4053a3b42bfSRobert Love * @f_ctl: F_CTL flags for the sequence 4063a3b42bfSRobert Love * @fh_type: The frame type 4073a3b42bfSRobert Love * @class: The class of service 4083a3b42bfSRobert Love * @seq: The sequence in use on this exchange 4097030fd62SBart Van Assche * @resp_active: Number of tasks that are concurrently executing @resp(). 4107030fd62SBart Van Assche * @resp_task: If @resp_active > 0, either the task executing @resp(), the 4117030fd62SBart Van Assche * task that has been interrupted to execute the soft-IRQ 4127030fd62SBart Van Assche * executing @resp() or NULL if more than one task is executing 4137030fd62SBart Van Assche * @resp concurrently. 4147030fd62SBart Van Assche * @resp_wq: Waitqueue for the tasks waiting on @resp_active. 4153a3b42bfSRobert Love * @resp: Callback for responses on this exchange 4163a3b42bfSRobert Love * @destructor: Called when destroying the exchange 4173a3b42bfSRobert Love * @arg: Passed as a void pointer to the resp() callback 41842e9a92fSRobert Love * 41942e9a92fSRobert Love * Locking notes: The ex_lock protects following items: 42042e9a92fSRobert Love * state, esb_stat, f_ctl, seq.ssb_stat 42142e9a92fSRobert Love * seq_id 42242e9a92fSRobert Love * sequence allocation 42342e9a92fSRobert Love */ 42442e9a92fSRobert Love struct fc_exch { 4253a3b42bfSRobert Love spinlock_t ex_lock; 4263a3b42bfSRobert Love atomic_t ex_refcnt; 42749a19889SVasu Dev enum fc_class class; 42849a19889SVasu Dev struct fc_exch_mgr *em; 42949a19889SVasu Dev struct fc_exch_pool *pool; 43049a19889SVasu Dev struct list_head ex_list; 4313a3b42bfSRobert Love struct fc_lport *lp; 43249a19889SVasu Dev u32 esb_stat; 43349a19889SVasu Dev u8 state; 43449a19889SVasu Dev u8 fh_type; 43549a19889SVasu Dev u8 seq_id; 43649a19889SVasu Dev u8 encaps; 43749a19889SVasu Dev u16 xid; 4383a3b42bfSRobert Love u16 oxid; 4393a3b42bfSRobert Love u16 rxid; 4403a3b42bfSRobert Love u32 oid; 4413a3b42bfSRobert Love u32 sid; 4423a3b42bfSRobert Love u32 did; 4433a3b42bfSRobert Love u32 r_a_tov; 4443a3b42bfSRobert Love u32 f_ctl; 4453a3b42bfSRobert Love struct fc_seq seq; 4467030fd62SBart Van Assche int resp_active; 4477030fd62SBart Van Assche struct task_struct *resp_task; 4487030fd62SBart Van Assche wait_queue_head_t resp_wq; 44942e9a92fSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *, void *); 45042e9a92fSRobert Love void *arg; 4513a3b42bfSRobert Love void (*destructor)(struct fc_seq *, void *); 45249a19889SVasu Dev struct delayed_work timeout_work; 45349a19889SVasu Dev } ____cacheline_aligned_in_smp; 45442e9a92fSRobert Love #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) 45542e9a92fSRobert Love 45642e9a92fSRobert Love 4573a3b42bfSRobert Love struct libfc_function_template { 45842e9a92fSRobert Love /* 45942e9a92fSRobert Love * Interface to send a FC frame 4600ae4d4aeSRobert Love * 4610ae4d4aeSRobert Love * STATUS: REQUIRED 46242e9a92fSRobert Love */ 4633a3b42bfSRobert Love int (*frame_send)(struct fc_lport *, struct fc_frame *); 46442e9a92fSRobert Love 46542e9a92fSRobert Love /* 4660ae4d4aeSRobert Love * Interface to send ELS/CT frames 4670ae4d4aeSRobert Love * 4680ae4d4aeSRobert Love * STATUS: OPTIONAL 46942e9a92fSRobert Love */ 4703a3b42bfSRobert Love struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did, 4713a3b42bfSRobert Love struct fc_frame *, unsigned int op, 47242e9a92fSRobert Love void (*resp)(struct fc_seq *, 4733a3b42bfSRobert Love struct fc_frame *, void *arg), 47442e9a92fSRobert Love void *arg, u32 timer_msec); 47542e9a92fSRobert Love 47642e9a92fSRobert Love /* 477b277d2aaSYi Zou * Sets up the DDP context for a given exchange id on the given 478b277d2aaSYi Zou * scatterlist if LLD supports DDP for large receive. 479b277d2aaSYi Zou * 480b277d2aaSYi Zou * STATUS: OPTIONAL 481b277d2aaSYi Zou */ 4823a3b42bfSRobert Love int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *, 4833a3b42bfSRobert Love unsigned int); 484b277d2aaSYi Zou /* 485b277d2aaSYi Zou * Completes the DDP transfer and returns the length of data DDPed 486b277d2aaSYi Zou * for the given exchange id. 487b277d2aaSYi Zou * 488b277d2aaSYi Zou * STATUS: OPTIONAL 489b277d2aaSYi Zou */ 4903a3b42bfSRobert Love int (*ddp_done)(struct fc_lport *, u16); 491b277d2aaSYi Zou /* 49233dc362bSYi Zou * Sets up the DDP context for a given exchange id on the given 4931bd49b48SVasu Dev * scatterlist if LLD supports DDP for target. 49433dc362bSYi Zou * 49533dc362bSYi Zou * STATUS: OPTIONAL 49633dc362bSYi Zou */ 49733dc362bSYi Zou int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *, 49833dc362bSYi Zou unsigned int); 49933dc362bSYi Zou /* 500b84056bfSYi Zou * Allow LLD to fill its own Link Error Status Block 501b84056bfSYi Zou * 502b84056bfSYi Zou * STATUS: OPTIONAL 503b84056bfSYi Zou */ 504b84056bfSYi Zou void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb); 50542e9a92fSRobert Love 50642e9a92fSRobert Love /* 50742e9a92fSRobert Love * Reset an exchange manager, completing all sequences and exchanges. 50842e9a92fSRobert Love * If s_id is non-zero, reset only exchanges originating from that FID. 50942e9a92fSRobert Love * If d_id is non-zero, reset only exchanges sending to that FID. 5100ae4d4aeSRobert Love * 5110ae4d4aeSRobert Love * STATUS: OPTIONAL 51242e9a92fSRobert Love */ 5133a3b42bfSRobert Love void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id); 51442e9a92fSRobert Love 5150ae4d4aeSRobert Love /* 516093bb6a2SJoe Eykholt * Set the local port FC_ID. 517093bb6a2SJoe Eykholt * 518093bb6a2SJoe Eykholt * This may be provided by the LLD to allow it to be 519093bb6a2SJoe Eykholt * notified when the local port is assigned a FC-ID. 520093bb6a2SJoe Eykholt * 521093bb6a2SJoe Eykholt * The frame, if non-NULL, is the incoming frame with the 522093bb6a2SJoe Eykholt * FLOGI LS_ACC or FLOGI, and may contain the granted MAC 523093bb6a2SJoe Eykholt * address for the LLD. The frame pointer may be NULL if 524093bb6a2SJoe Eykholt * no MAC is associated with this assignment (LOGO or PLOGI). 525093bb6a2SJoe Eykholt * 526093bb6a2SJoe Eykholt * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid. 527093bb6a2SJoe Eykholt * 528093bb6a2SJoe Eykholt * Note: this is called with the local port mutex held. 529093bb6a2SJoe Eykholt * 530093bb6a2SJoe Eykholt * STATUS: OPTIONAL 531093bb6a2SJoe Eykholt */ 532093bb6a2SJoe Eykholt void (*lport_set_port_id)(struct fc_lport *, u32 port_id, 533093bb6a2SJoe Eykholt struct fc_frame *); 534093bb6a2SJoe Eykholt 535093bb6a2SJoe Eykholt /* 53675a2792dSBhanu Prakash Gollapudi * Callback routine after the remote port is logged in 53775a2792dSBhanu Prakash Gollapudi * 53875a2792dSBhanu Prakash Gollapudi * STATUS: OPTIONAL 53975a2792dSBhanu Prakash Gollapudi */ 54075a2792dSBhanu Prakash Gollapudi void (*rport_event_callback)(struct fc_lport *, 54175a2792dSBhanu Prakash Gollapudi struct fc_rport_priv *, 54275a2792dSBhanu Prakash Gollapudi enum fc_rport_event); 54375a2792dSBhanu Prakash Gollapudi 54475a2792dSBhanu Prakash Gollapudi /* 54542e9a92fSRobert Love * Send a fcp cmd from fsp pkt. 54642e9a92fSRobert Love * Called with the SCSI host lock unlocked and irqs disabled. 54742e9a92fSRobert Love * 54842e9a92fSRobert Love * The resp handler is called when FCP_RSP received. 54942e9a92fSRobert Love * 5500ae4d4aeSRobert Love * STATUS: OPTIONAL 55142e9a92fSRobert Love */ 5523a3b42bfSRobert Love int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *, 5533a3b42bfSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *, 5543a3b42bfSRobert Love void *)); 55542e9a92fSRobert Love 55642e9a92fSRobert Love /* 55725985edcSLucas De Marchi * Cleanup the FCP layer, used during link down and reset 5580ae4d4aeSRobert Love * 5590ae4d4aeSRobert Love * STATUS: OPTIONAL 56042e9a92fSRobert Love */ 5613a3b42bfSRobert Love void (*fcp_cleanup)(struct fc_lport *); 56242e9a92fSRobert Love 56342e9a92fSRobert Love /* 56442e9a92fSRobert Love * Abort all I/O on a local port 5650ae4d4aeSRobert Love * 5660ae4d4aeSRobert Love * STATUS: OPTIONAL 56742e9a92fSRobert Love */ 5683a3b42bfSRobert Love void (*fcp_abort_io)(struct fc_lport *); 56942e9a92fSRobert Love 5700ae4d4aeSRobert Love /* 5710ae4d4aeSRobert Love * Receive a request for the discovery layer. 5720ae4d4aeSRobert Love * 5730ae4d4aeSRobert Love * STATUS: OPTIONAL 57442e9a92fSRobert Love */ 57592261156SJoe Eykholt void (*disc_recv_req)(struct fc_lport *, struct fc_frame *); 57642e9a92fSRobert Love 57742e9a92fSRobert Love /* 57842e9a92fSRobert Love * Start discovery for a local port. 5790ae4d4aeSRobert Love * 5800ae4d4aeSRobert Love * STATUS: OPTIONAL 58142e9a92fSRobert Love */ 58242e9a92fSRobert Love void (*disc_start)(void (*disc_callback)(struct fc_lport *, 58342e9a92fSRobert Love enum fc_disc_event), 58442e9a92fSRobert Love struct fc_lport *); 58542e9a92fSRobert Love 58642e9a92fSRobert Love /* 58742e9a92fSRobert Love * Stop discovery for a given lport. This will remove 58842e9a92fSRobert Love * all discovered rports 5890ae4d4aeSRobert Love * 5900ae4d4aeSRobert Love * STATUS: OPTIONAL 59142e9a92fSRobert Love */ 59242e9a92fSRobert Love void (*disc_stop) (struct fc_lport *); 59342e9a92fSRobert Love 59442e9a92fSRobert Love /* 59542e9a92fSRobert Love * Stop discovery for a given lport. This will block 59642e9a92fSRobert Love * until all discovered rports are deleted from the 59742e9a92fSRobert Love * FC transport class 5980ae4d4aeSRobert Love * 5990ae4d4aeSRobert Love * STATUS: OPTIONAL 60042e9a92fSRobert Love */ 60142e9a92fSRobert Love void (*disc_stop_final) (struct fc_lport *); 60242e9a92fSRobert Love }; 60342e9a92fSRobert Love 6043a3b42bfSRobert Love /** 6053a3b42bfSRobert Love * struct fc_disc - Discovery context 6063a3b42bfSRobert Love * @retry_count: Number of retries 6073a3b42bfSRobert Love * @pending: 1 if discovery is pending, 0 if not 608c531b9b4SBhanu Prakash Gollapudi * @requested: 1 if discovery has been requested, 0 if not 6093a3b42bfSRobert Love * @seq_count: Number of sequences used for discovery 6103a3b42bfSRobert Love * @buf_len: Length of the discovery buffer 6113a3b42bfSRobert Love * @disc_id: Discovery ID 6123a3b42bfSRobert Love * @rports: List of discovered remote ports 6130685230cSJoe Eykholt * @priv: Private pointer for use by discovery code 6143a3b42bfSRobert Love * @disc_mutex: Mutex that protects the discovery context 6153a3b42bfSRobert Love * @partial_buf: Partial name buffer (if names are returned 6163a3b42bfSRobert Love * in multiple frames) 6173a3b42bfSRobert Love * @disc_work: handle for delayed work context 6183a3b42bfSRobert Love * @disc_callback: Callback routine called when discovery completes 6193a3b42bfSRobert Love */ 62042e9a92fSRobert Love struct fc_disc { 62142e9a92fSRobert Love unsigned char retry_count; 62242e9a92fSRobert Love unsigned char pending; 62342e9a92fSRobert Love unsigned char requested; 62442e9a92fSRobert Love unsigned short seq_count; 62542e9a92fSRobert Love unsigned char buf_len; 6260f6c6149SJoe Eykholt u16 disc_id; 62742e9a92fSRobert Love 62842e9a92fSRobert Love struct list_head rports; 6290685230cSJoe Eykholt void *priv; 63042e9a92fSRobert Love struct mutex disc_mutex; 6313a3b42bfSRobert Love struct fc_gpn_ft_resp partial_buf; 63242e9a92fSRobert Love struct delayed_work disc_work; 6333a3b42bfSRobert Love 6343a3b42bfSRobert Love void (*disc_callback)(struct fc_lport *, 6353a3b42bfSRobert Love enum fc_disc_event); 63642e9a92fSRobert Love }; 63742e9a92fSRobert Love 63870d53b04SJoe Eykholt /* 63970d53b04SJoe Eykholt * Local port notifier and events. 64070d53b04SJoe Eykholt */ 64170d53b04SJoe Eykholt extern struct blocking_notifier_head fc_lport_notifier_head; 64270d53b04SJoe Eykholt enum fc_lport_event { 64370d53b04SJoe Eykholt FC_LPORT_EV_ADD, 64470d53b04SJoe Eykholt FC_LPORT_EV_DEL, 64570d53b04SJoe Eykholt }; 64670d53b04SJoe Eykholt 6473a3b42bfSRobert Love /** 6483a3b42bfSRobert Love * struct fc_lport - Local port 6493a3b42bfSRobert Love * @host: The SCSI host associated with a local port 6503a3b42bfSRobert Love * @ema_list: Exchange manager anchor list 6513a3b42bfSRobert Love * @dns_rdata: The directory server remote port 652d78c317fSNeerav Parikh * @ms_rdata: The management server remote port 6533a3b42bfSRobert Love * @ptp_rdata: Point to point remote port 6543a3b42bfSRobert Love * @scsi_priv: FCP layer internal data 6553a3b42bfSRobert Love * @disc: Discovery context 6563a3b42bfSRobert Love * @vports: Child vports if N_Port 6573a3b42bfSRobert Love * @vport: Parent vport if VN_Port 6583a3b42bfSRobert Love * @tt: Libfc function template 6593a3b42bfSRobert Love * @link_up: Link state (1 = link up, 0 = link down) 6603a3b42bfSRobert Love * @qfull: Queue state (1 queue is full, 0 queue is not full) 6613a3b42bfSRobert Love * @state: Identifies the state 6623a3b42bfSRobert Love * @boot_time: Timestamp indicating when the local port came online 6633a3b42bfSRobert Love * @host_stats: SCSI host statistics 6641bd49b48SVasu Dev * @stats: FC local port stats (TODO separate libfc LLD stats) 6653a3b42bfSRobert Love * @retry_count: Number of retries in the current state 6667b2787ecSRobert Love * @port_id: FC Port ID 6673a3b42bfSRobert Love * @wwpn: World Wide Port Name 6683a3b42bfSRobert Love * @wwnn: World Wide Node Name 6693a3b42bfSRobert Love * @service_params: Common service parameters 6703a3b42bfSRobert Love * @e_d_tov: Error detection timeout value 6713a3b42bfSRobert Love * @r_a_tov: Resouce allocation timeout value 6723a3b42bfSRobert Love * @rnid_gen: RNID information 6733a3b42bfSRobert Love * @sg_supp: Indicates if scatter gather is supported 6743a3b42bfSRobert Love * @seq_offload: Indicates if sequence offload is supported 6753a3b42bfSRobert Love * @crc_offload: Indicates if CRC offload is supported 6763a3b42bfSRobert Love * @lro_enabled: Indicates if large receive offload is supported 6773a3b42bfSRobert Love * @does_npiv: Supports multiple vports 6783a3b42bfSRobert Love * @npiv_enabled: Switch/fabric allows NPIV 6793a3b42bfSRobert Love * @mfs: The maximum Fibre Channel payload size 6803a3b42bfSRobert Love * @max_retry_count: The maximum retry attempts 6813a3b42bfSRobert Love * @max_rport_retry_count: The maximum remote port retry attempts 682f90377abSJoe Eykholt * @rport_priv_size: Size needed by driver after struct fc_rport_priv 6833a3b42bfSRobert Love * @lro_xid: The maximum XID for LRO 6843a3b42bfSRobert Love * @lso_max: The maximum large offload send size 6853a3b42bfSRobert Love * @fcts: FC-4 type mask 6863a3b42bfSRobert Love * @lp_mutex: Mutex to protect the local port 68770d53b04SJoe Eykholt * @list: Linkage on list of vport peers 6883a3b42bfSRobert Love * @retry_work: Handle to local port for delayed retry context 689baf9fdf0SJoe Eykholt * @prov: Pointers available for use by passive FC-4 providers 69070d53b04SJoe Eykholt * @lport_list: Linkage on module-wide list of local ports 6913a3b42bfSRobert Love */ 69242e9a92fSRobert Love struct fc_lport { 69342e9a92fSRobert Love /* Associations */ 69442e9a92fSRobert Love struct Scsi_Host *host; 69596316099SVasu Dev struct list_head ema_list; 6963a3b42bfSRobert Love struct fc_rport_priv *dns_rdata; 697d78c317fSNeerav Parikh struct fc_rport_priv *ms_rdata; 6983a3b42bfSRobert Love struct fc_rport_priv *ptp_rdata; 69942e9a92fSRobert Love void *scsi_priv; 70042e9a92fSRobert Love struct fc_disc disc; 70142e9a92fSRobert Love 7023a3b42bfSRobert Love /* Virtual port information */ 7033a3b42bfSRobert Love struct list_head vports; 7043a3b42bfSRobert Love struct fc_vport *vport; 7053a3b42bfSRobert Love 70642e9a92fSRobert Love /* Operational Information */ 70742e9a92fSRobert Love struct libfc_function_template tt; 708bc0e17f6SVasu Dev u8 link_up; 709bc0e17f6SVasu Dev u8 qfull; 7109a6cf881SHannes Reinecke u16 vlan; 71142e9a92fSRobert Love enum fc_lport_state state; 71242e9a92fSRobert Love unsigned long boot_time; 71342e9a92fSRobert Love struct fc_host_statistics host_stats; 7141bd49b48SVasu Dev struct fc_stats __percpu *stats; 71542e9a92fSRobert Love u8 retry_count; 71642e9a92fSRobert Love 7173a3b42bfSRobert Love /* Fabric information */ 7187b2787ecSRobert Love u32 port_id; 7193a3b42bfSRobert Love u64 wwpn; 7203a3b42bfSRobert Love u64 wwnn; 72142e9a92fSRobert Love unsigned int service_params; 72242e9a92fSRobert Love unsigned int e_d_tov; 72342e9a92fSRobert Love unsigned int r_a_tov; 7243a3b42bfSRobert Love struct fc_els_rnid_gen rnid_gen; 7253a3b42bfSRobert Love 7263a3b42bfSRobert Love /* Capabilities */ 7273a3b42bfSRobert Love u32 sg_supp:1; 7283a3b42bfSRobert Love u32 seq_offload:1; 7293a3b42bfSRobert Love u32 crc_offload:1; 7303a3b42bfSRobert Love u32 lro_enabled:1; 7313a3b42bfSRobert Love u32 does_npiv:1; 7323a3b42bfSRobert Love u32 npiv_enabled:1; 7333726f358SJoe Eykholt u32 point_to_multipoint:1; 734d78c317fSNeerav Parikh u32 fdmi_enabled:1; 7353a3b42bfSRobert Love u32 mfs; 73642e9a92fSRobert Love u8 max_retry_count; 737a3666955SAbhijeet Joglekar u8 max_rport_retry_count; 738f90377abSJoe Eykholt u16 rport_priv_size; 73942e9a92fSRobert Love u16 link_speed; 74042e9a92fSRobert Love u16 link_supported_speeds; 7413a3b42bfSRobert Love u16 lro_xid; 7423a3b42bfSRobert Love unsigned int lso_max; 7433a3b42bfSRobert Love struct fc_ns_fts fcts; 74442e9a92fSRobert Love 74542e9a92fSRobert Love /* Miscellaneous */ 7463a3b42bfSRobert Love struct mutex lp_mutex; 7473a3b42bfSRobert Love struct list_head list; 74842e9a92fSRobert Love struct delayed_work retry_work; 749baf9fdf0SJoe Eykholt void *prov[FC_FC4_PROV_SIZE]; 75070d53b04SJoe Eykholt struct list_head lport_list; 75142e9a92fSRobert Love }; 75242e9a92fSRobert Love 75396ad8464SJoe Eykholt /** 75496ad8464SJoe Eykholt * struct fc4_prov - FC-4 provider registration 75596ad8464SJoe Eykholt * @prli: Handler for incoming PRLI 75696ad8464SJoe Eykholt * @prlo: Handler for session reset 75796ad8464SJoe Eykholt * @recv: Handler for incoming request 75896ad8464SJoe Eykholt * @module: Pointer to module. May be NULL. 75996ad8464SJoe Eykholt */ 76096ad8464SJoe Eykholt struct fc4_prov { 76196ad8464SJoe Eykholt int (*prli)(struct fc_rport_priv *, u32 spp_len, 76296ad8464SJoe Eykholt const struct fc_els_spp *spp_in, 76396ad8464SJoe Eykholt struct fc_els_spp *spp_out); 76496ad8464SJoe Eykholt void (*prlo)(struct fc_rport_priv *); 76596ad8464SJoe Eykholt void (*recv)(struct fc_lport *, struct fc_frame *); 76696ad8464SJoe Eykholt struct module *module; 76796ad8464SJoe Eykholt }; 76896ad8464SJoe Eykholt 76996ad8464SJoe Eykholt /* 77096ad8464SJoe Eykholt * Register FC-4 provider with libfc. 77196ad8464SJoe Eykholt */ 77296ad8464SJoe Eykholt int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *); 77396ad8464SJoe Eykholt void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *); 77496ad8464SJoe Eykholt 77534f42a07SRobert Love /* 77642e9a92fSRobert Love * FC_LPORT HELPER FUNCTIONS 77742e9a92fSRobert Love *****************************/ 7783a3b42bfSRobert Love 7793a3b42bfSRobert Love /** 7803a3b42bfSRobert Love * fc_lport_test_ready() - Determine if a local port is in the READY state 7813a3b42bfSRobert Love * @lport: The local port to test 7823a3b42bfSRobert Love */ 7833a3b42bfSRobert Love static inline int fc_lport_test_ready(struct fc_lport *lport) 78442e9a92fSRobert Love { 7853a3b42bfSRobert Love return lport->state == LPORT_ST_READY; 78642e9a92fSRobert Love } 78742e9a92fSRobert Love 7883a3b42bfSRobert Love /** 7893a3b42bfSRobert Love * fc_set_wwnn() - Set the World Wide Node Name of a local port 7903a3b42bfSRobert Love * @lport: The local port whose WWNN is to be set 7913a3b42bfSRobert Love * @wwnn: The new WWNN 7923a3b42bfSRobert Love */ 7933a3b42bfSRobert Love static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn) 79442e9a92fSRobert Love { 7953a3b42bfSRobert Love lport->wwnn = wwnn; 79642e9a92fSRobert Love } 79742e9a92fSRobert Love 7983a3b42bfSRobert Love /** 7993a3b42bfSRobert Love * fc_set_wwpn() - Set the World Wide Port Name of a local port 8003a3b42bfSRobert Love * @lport: The local port whose WWPN is to be set 80167d35e70SFam Zheng * @wwpn: The new WWPN 8023a3b42bfSRobert Love */ 80367d35e70SFam Zheng static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwpn) 80442e9a92fSRobert Love { 80567d35e70SFam Zheng lport->wwpn = wwpn; 80642e9a92fSRobert Love } 80742e9a92fSRobert Love 8083a3b42bfSRobert Love /** 8093a3b42bfSRobert Love * fc_lport_state_enter() - Change a local port's state 8103a3b42bfSRobert Love * @lport: The local port whose state is to change 8113a3b42bfSRobert Love * @state: The new state 8123a3b42bfSRobert Love */ 8133a3b42bfSRobert Love static inline void fc_lport_state_enter(struct fc_lport *lport, 81442e9a92fSRobert Love enum fc_lport_state state) 81542e9a92fSRobert Love { 8163a3b42bfSRobert Love if (state != lport->state) 8173a3b42bfSRobert Love lport->retry_count = 0; 8183a3b42bfSRobert Love lport->state = state; 81942e9a92fSRobert Love } 82042e9a92fSRobert Love 8213a3b42bfSRobert Love /** 8223a3b42bfSRobert Love * fc_lport_init_stats() - Allocate per-CPU statistics for a local port 8233a3b42bfSRobert Love * @lport: The local port whose statistics are to be initialized 8243a3b42bfSRobert Love */ 8253a3b42bfSRobert Love static inline int fc_lport_init_stats(struct fc_lport *lport) 826582b45bcSRobert Love { 8271bd49b48SVasu Dev lport->stats = alloc_percpu(struct fc_stats); 8281bd49b48SVasu Dev if (!lport->stats) 829582b45bcSRobert Love return -ENOMEM; 830582b45bcSRobert Love return 0; 831582b45bcSRobert Love } 832582b45bcSRobert Love 8333a3b42bfSRobert Love /** 8343a3b42bfSRobert Love * fc_lport_free_stats() - Free memory for a local port's statistics 8353a3b42bfSRobert Love * @lport: The local port whose statistics are to be freed 8363a3b42bfSRobert Love */ 8373a3b42bfSRobert Love static inline void fc_lport_free_stats(struct fc_lport *lport) 838582b45bcSRobert Love { 8391bd49b48SVasu Dev free_percpu(lport->stats); 840a0a25da2SVasu Dev } 841a0a25da2SVasu Dev 842a0a25da2SVasu Dev /** 8433a3b42bfSRobert Love * lport_priv() - Return the private data from a local port 8443a3b42bfSRobert Love * @lport: The local port whose private data is to be retreived 8453a3b42bfSRobert Love */ 8463a3b42bfSRobert Love static inline void *lport_priv(const struct fc_lport *lport) 8473a3b42bfSRobert Love { 8483a3b42bfSRobert Love return (void *)(lport + 1); 8493a3b42bfSRobert Love } 8503a3b42bfSRobert Love 8513a3b42bfSRobert Love /** 8523a3b42bfSRobert Love * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and 8533a3b42bfSRobert Love * LLD private data 8543a3b42bfSRobert Love * @sht: The SCSI host template 8553a3b42bfSRobert Love * @priv_size: Size of private data 856a0a25da2SVasu Dev * 85786221969SChris Leech * Returns: libfc lport 858a0a25da2SVasu Dev */ 85986221969SChris Leech static inline struct fc_lport * 860a0a25da2SVasu Dev libfc_host_alloc(struct scsi_host_template *sht, int priv_size) 861a0a25da2SVasu Dev { 86286221969SChris Leech struct fc_lport *lport; 86386221969SChris Leech struct Scsi_Host *shost; 86486221969SChris Leech 86586221969SChris Leech shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); 86686221969SChris Leech if (!shost) 86786221969SChris Leech return NULL; 86886221969SChris Leech lport = shost_priv(shost); 86986221969SChris Leech lport->host = shost; 87086221969SChris Leech INIT_LIST_HEAD(&lport->ema_list); 871174e1ebfSChris Leech INIT_LIST_HEAD(&lport->vports); 87286221969SChris Leech return lport; 873a0a25da2SVasu Dev } 87442e9a92fSRobert Love 87534f42a07SRobert Love /* 8763a3b42bfSRobert Love * FC_FCP HELPER FUNCTIONS 8773a3b42bfSRobert Love *****************************/ 8783a3b42bfSRobert Love static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) 8793a3b42bfSRobert Love { 8803a3b42bfSRobert Love if (fsp && fsp->cmd) 8813a3b42bfSRobert Love return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; 8823a3b42bfSRobert Love return false; 8833a3b42bfSRobert Love } 8843a3b42bfSRobert Love 8853a3b42bfSRobert Love /* 88642e9a92fSRobert Love * LOCAL PORT LAYER 88742e9a92fSRobert Love *****************************/ 8883a3b42bfSRobert Love int fc_lport_init(struct fc_lport *); 8893a3b42bfSRobert Love int fc_lport_destroy(struct fc_lport *); 8903a3b42bfSRobert Love int fc_fabric_logoff(struct fc_lport *); 8913a3b42bfSRobert Love int fc_fabric_login(struct fc_lport *); 8928faecddbSChris Leech void __fc_linkup(struct fc_lport *); 89342e9a92fSRobert Love void fc_linkup(struct fc_lport *); 8948faecddbSChris Leech void __fc_linkdown(struct fc_lport *); 89542e9a92fSRobert Love void fc_linkdown(struct fc_lport *); 8963a3b42bfSRobert Love void fc_vport_setlink(struct fc_lport *); 8973a3b42bfSRobert Love void fc_vports_linkchange(struct fc_lport *); 89842e9a92fSRobert Love int fc_lport_config(struct fc_lport *); 89942e9a92fSRobert Love int fc_lport_reset(struct fc_lport *); 900c5cb444cSHannes Reinecke void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp); 9013a3b42bfSRobert Love int fc_set_mfs(struct fc_lport *, u32 mfs); 9023a3b42bfSRobert Love struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize); 9033a3b42bfSRobert Love struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id); 90475cc8cfcSJohannes Thumshirn int fc_lport_bsg_request(struct bsg_job *); 9053726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *, u32 port_id); 90670d53b04SJoe Eykholt void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *); 907a51ab396SSteve Ma 908a51ab396SSteve Ma /* 90942e9a92fSRobert Love * REMOTE PORT LAYER 91042e9a92fSRobert Love *****************************/ 9113a3b42bfSRobert Love void fc_rport_terminate_io(struct fc_rport *); 912e87b7777SHannes Reinecke struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, 913e87b7777SHannes Reinecke u32 port_id); 9142580064bSHannes Reinecke struct fc_rport_priv *fc_rport_create(struct fc_lport *, u32); 915944ef968SHannes Reinecke void fc_rport_destroy(struct kref *kref); 91605d7d3b0SHannes Reinecke int fc_rport_login(struct fc_rport_priv *rdata); 917c96c792aSHannes Reinecke int fc_rport_logoff(struct fc_rport_priv *rdata); 918e76ee65fSHannes Reinecke void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp); 9195922a957SHannes Reinecke void fc_rport_flush_queue(void); 92042e9a92fSRobert Love 92134f42a07SRobert Love /* 92242e9a92fSRobert Love * DISCOVERY LAYER 92342e9a92fSRobert Love *****************************/ 9240807619dSRobert Love void fc_disc_init(struct fc_lport *); 9250807619dSRobert Love void fc_disc_config(struct fc_lport *, void *); 92642e9a92fSRobert Love 9270685230cSJoe Eykholt static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc) 9280685230cSJoe Eykholt { 9290685230cSJoe Eykholt return container_of(disc, struct fc_lport, disc); 9300685230cSJoe Eykholt } 9310685230cSJoe Eykholt 93234f42a07SRobert Love /* 9333a3b42bfSRobert Love * FCP LAYER 93442e9a92fSRobert Love *****************************/ 93542e9a92fSRobert Love int fc_fcp_init(struct fc_lport *); 93642e9a92fSRobert Love void fc_fcp_destroy(struct fc_lport *); 93742e9a92fSRobert Love 93834f42a07SRobert Love /* 9393a3b42bfSRobert Love * SCSI INTERACTION LAYER 9403a3b42bfSRobert Love *****************************/ 941f281233dSJeff Garzik int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); 9423a3b42bfSRobert Love int fc_eh_abort(struct scsi_cmnd *); 9433a3b42bfSRobert Love int fc_eh_device_reset(struct scsi_cmnd *); 9443a3b42bfSRobert Love int fc_eh_host_reset(struct scsi_cmnd *); 9453a3b42bfSRobert Love int fc_slave_alloc(struct scsi_device *); 9463a3b42bfSRobert Love 9473a3b42bfSRobert Love /* 94842e9a92fSRobert Love * ELS/CT interface 94942e9a92fSRobert Love *****************************/ 9503a3b42bfSRobert Love int fc_elsct_init(struct fc_lport *); 9513a3b42bfSRobert Love struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did, 9523a3b42bfSRobert Love struct fc_frame *, 95311b56188SChris Leech unsigned int op, 95411b56188SChris Leech void (*resp)(struct fc_seq *, 9553a3b42bfSRobert Love struct fc_frame *, 95611b56188SChris Leech void *arg), 95711b56188SChris Leech void *arg, u32 timer_msec); 95811b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); 95911b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); 96024f089e2SJoe Eykholt void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *, 96124f089e2SJoe Eykholt enum fc_rctl, u32 parm_offset); 96224f089e2SJoe Eykholt void fc_fill_hdr(struct fc_frame *, const struct fc_frame *, 96324f089e2SJoe Eykholt enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset); 96442e9a92fSRobert Love 96542e9a92fSRobert Love 96634f42a07SRobert Love /* 96742e9a92fSRobert Love * EXCHANGE MANAGER LAYER 96842e9a92fSRobert Love *****************************/ 9693a3b42bfSRobert Love int fc_exch_init(struct fc_lport *); 9704e5fae7aSVasu Dev void fc_exch_update_stats(struct fc_lport *lport); 9713afd2d15SHannes Reinecke struct fc_seq *fc_exch_seq_send(struct fc_lport *lport, 9723afd2d15SHannes Reinecke struct fc_frame *fp, 9733afd2d15SHannes Reinecke void (*resp)(struct fc_seq *, 9743afd2d15SHannes Reinecke struct fc_frame *fp, 9753afd2d15SHannes Reinecke void *arg), 9763afd2d15SHannes Reinecke void (*destructor)(struct fc_seq *, void *), 9773afd2d15SHannes Reinecke void *arg, u32 timer_msec); 9787ab24dd1SHannes Reinecke void fc_seq_els_rsp_send(struct fc_frame *, enum fc_els_cmd, 9797ab24dd1SHannes Reinecke struct fc_seq_els_data *); 980c6865b30SHannes Reinecke struct fc_seq *fc_seq_start_next(struct fc_seq *sp); 981f1d61e6eSHannes Reinecke void fc_seq_set_resp(struct fc_seq *sp, 982f1d61e6eSHannes Reinecke void (*resp)(struct fc_seq *, struct fc_frame *, void *), 983f1d61e6eSHannes Reinecke void *arg); 98496d564e2SHannes Reinecke struct fc_seq *fc_seq_assign(struct fc_lport *lport, struct fc_frame *fp); 9859625cc48SHannes Reinecke void fc_seq_release(struct fc_seq *sp); 9863a3b42bfSRobert Love struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *, 9873a3b42bfSRobert Love struct fc_exch_mgr *, 98896316099SVasu Dev bool (*match)(struct fc_frame *)); 9893a3b42bfSRobert Love void fc_exch_mgr_del(struct fc_exch_mgr_anchor *); 990174e1ebfSChris Leech int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); 9913a3b42bfSRobert Love struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class, 9923a3b42bfSRobert Love u16 min_xid, u16 max_xid, 99352ff878cSVasu Dev bool (*match)(struct fc_frame *)); 9943a3b42bfSRobert Love void fc_exch_mgr_free(struct fc_lport *); 9953a3b42bfSRobert Love void fc_exch_recv(struct fc_lport *, struct fc_frame *); 9961f6ff364SAbhijeet Joglekar void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); 9970cac937dSHannes Reinecke int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp, struct fc_frame *fp); 9980ebaed17SHannes Reinecke int fc_seq_exch_abort(const struct fc_seq *, unsigned int timer_msec); 999768c72ccSHannes Reinecke void fc_exch_done(struct fc_seq *sp); 100042e9a92fSRobert Love 100142e9a92fSRobert Love /* 100242e9a92fSRobert Love * Functions for fc_functions_template 100342e9a92fSRobert Love */ 10043a3b42bfSRobert Love void fc_get_host_speed(struct Scsi_Host *); 10053a3b42bfSRobert Love void fc_get_host_port_state(struct Scsi_Host *); 10063a3b42bfSRobert Love void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout); 100742e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); 100842e9a92fSRobert Love 100942e9a92fSRobert Love #endif /* _LIBFC_H_ */ 1010