142e9a92fSRobert Love /* 242e9a92fSRobert Love * Copyright(c) 2007 Intel Corporation. All rights reserved. 342e9a92fSRobert Love * 442e9a92fSRobert Love * This program is free software; you can redistribute it and/or modify it 542e9a92fSRobert Love * under the terms and conditions of the GNU General Public License, 642e9a92fSRobert Love * version 2, as published by the Free Software Foundation. 742e9a92fSRobert Love * 842e9a92fSRobert Love * This program is distributed in the hope it will be useful, but WITHOUT 942e9a92fSRobert Love * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1042e9a92fSRobert Love * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 1142e9a92fSRobert Love * more details. 1242e9a92fSRobert Love * 1342e9a92fSRobert Love * You should have received a copy of the GNU General Public License along with 1442e9a92fSRobert Love * this program; if not, write to the Free Software Foundation, Inc., 1542e9a92fSRobert Love * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 1642e9a92fSRobert Love * 1742e9a92fSRobert Love * Maintained at www.Open-FCoE.org 1842e9a92fSRobert Love */ 1942e9a92fSRobert Love 2042e9a92fSRobert Love #ifndef _LIBFC_H_ 2142e9a92fSRobert Love #define _LIBFC_H_ 2242e9a92fSRobert Love 2342e9a92fSRobert Love #include <linux/timer.h> 2442e9a92fSRobert Love #include <linux/if.h> 25582b45bcSRobert Love #include <linux/percpu.h> 2642e9a92fSRobert Love 2742e9a92fSRobert Love #include <scsi/scsi_transport.h> 2842e9a92fSRobert Love #include <scsi/scsi_transport_fc.h> 29a51ab396SSteve Ma #include <scsi/scsi_bsg_fc.h> 3042e9a92fSRobert Love 3142e9a92fSRobert Love #include <scsi/fc/fc_fcp.h> 3242e9a92fSRobert Love #include <scsi/fc/fc_ns.h> 33d78c317fSNeerav Parikh #include <scsi/fc/fc_ms.h> 3442e9a92fSRobert Love #include <scsi/fc/fc_els.h> 3542e9a92fSRobert Love #include <scsi/fc/fc_gs.h> 3642e9a92fSRobert Love 3742e9a92fSRobert Love #include <scsi/fc_frame.h> 3842e9a92fSRobert Love 3996ad8464SJoe Eykholt #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */ 4096ad8464SJoe Eykholt 4142e9a92fSRobert Love /* 4242e9a92fSRobert Love * libfc error codes 4342e9a92fSRobert Love */ 4442e9a92fSRobert Love #define FC_NO_ERR 0 /* no error */ 4542e9a92fSRobert Love #define FC_EX_TIMEOUT 1 /* Exchange timeout */ 4642e9a92fSRobert Love #define FC_EX_CLOSED 2 /* Exchange closed */ 479f9504a7SHannes Reinecke #define FC_EX_ALLOC_ERR 3 /* Exchange allocation failed */ 489f9504a7SHannes Reinecke #define FC_EX_XMIT_ERR 4 /* Exchange transmit failed */ 499f9504a7SHannes Reinecke #define FC_EX_ELS_RJT 5 /* ELS rejected */ 509f9504a7SHannes Reinecke #define FC_EX_INV_LOGIN 6 /* Login not completed */ 519f9504a7SHannes Reinecke #define FC_EX_SEQ_ERR 6 /* Exchange sequence error */ 5242e9a92fSRobert Love 533a3b42bfSRobert Love /** 543a3b42bfSRobert Love * enum fc_lport_state - Local port states 553a3b42bfSRobert Love * @LPORT_ST_DISABLED: Disabled 563a3b42bfSRobert Love * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent 573a3b42bfSRobert Love * @LPORT_ST_DNS: Waiting for name server remote port to become ready 583a3b42bfSRobert Love * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent 593a3b42bfSRobert Love * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent 60ab593b18SJoe Eykholt * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent 61d78c317fSNeerav Parikh * @LPORT_ST_FDMI: Waiting for mgmt server rport to become ready 62d78c317fSNeerav Parikh * @LPORT_ST_RHBA: 633a3b42bfSRobert Love * @LPORT_ST_SCR: State Change Register (SCR) sent 643a3b42bfSRobert Love * @LPORT_ST_READY: Ready for use 653a3b42bfSRobert Love * @LPORT_ST_LOGO: Local port logout (LOGO) sent 663a3b42bfSRobert Love * @LPORT_ST_RESET: Local port reset 6742e9a92fSRobert Love */ 6842e9a92fSRobert Love enum fc_lport_state { 69b1d9fd55SJoe Eykholt LPORT_ST_DISABLED = 0, 7042e9a92fSRobert Love LPORT_ST_FLOGI, 7142e9a92fSRobert Love LPORT_ST_DNS, 72c9c7bd7aSChris Leech LPORT_ST_RNN_ID, 735baa17c3SChris Leech LPORT_ST_RSNN_NN, 74c9866a54SChris Leech LPORT_ST_RSPN_ID, 7542e9a92fSRobert Love LPORT_ST_RFT_ID, 76ab593b18SJoe Eykholt LPORT_ST_RFF_ID, 77d78c317fSNeerav Parikh LPORT_ST_FDMI, 78d78c317fSNeerav Parikh LPORT_ST_RHBA, 79d78c317fSNeerav Parikh LPORT_ST_RPA, 80d78c317fSNeerav Parikh LPORT_ST_DHBA, 81d78c317fSNeerav Parikh LPORT_ST_DPRT, 8242e9a92fSRobert Love LPORT_ST_SCR, 8342e9a92fSRobert Love LPORT_ST_READY, 8442e9a92fSRobert Love LPORT_ST_LOGO, 8542e9a92fSRobert Love LPORT_ST_RESET 8642e9a92fSRobert Love }; 8742e9a92fSRobert Love 8842e9a92fSRobert Love enum fc_disc_event { 8942e9a92fSRobert Love DISC_EV_NONE = 0, 9042e9a92fSRobert Love DISC_EV_SUCCESS, 9142e9a92fSRobert Love DISC_EV_FAILED 9242e9a92fSRobert Love }; 9342e9a92fSRobert Love 943a3b42bfSRobert Love /** 953a3b42bfSRobert Love * enum fc_rport_state - Remote port states 963a3b42bfSRobert Love * @RPORT_ST_INIT: Initialized 97a7b12a27SJoe Eykholt * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint 98a7b12a27SJoe Eykholt * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint 993a3b42bfSRobert Love * @RPORT_ST_PLOGI: Waiting for PLOGI completion 1003a3b42bfSRobert Love * @RPORT_ST_PRLI: Waiting for PRLI completion 1013a3b42bfSRobert Love * @RPORT_ST_RTV: Waiting for RTV completion 1023a3b42bfSRobert Love * @RPORT_ST_READY: Ready for use 1033a3b42bfSRobert Love * @RPORT_ST_ADISC: Discover Address sent 1043a3b42bfSRobert Love * @RPORT_ST_DELETE: Remote port being deleted 1053a3b42bfSRobert Love */ 10642e9a92fSRobert Love enum fc_rport_state { 1073a3b42bfSRobert Love RPORT_ST_INIT, 108a7b12a27SJoe Eykholt RPORT_ST_FLOGI, 109a7b12a27SJoe Eykholt RPORT_ST_PLOGI_WAIT, 1103a3b42bfSRobert Love RPORT_ST_PLOGI, 1113a3b42bfSRobert Love RPORT_ST_PRLI, 1123a3b42bfSRobert Love RPORT_ST_RTV, 1133a3b42bfSRobert Love RPORT_ST_READY, 1143a3b42bfSRobert Love RPORT_ST_ADISC, 1153a3b42bfSRobert Love RPORT_ST_DELETE, 11642e9a92fSRobert Love }; 11742e9a92fSRobert Love 11842e9a92fSRobert Love /** 11942e9a92fSRobert Love * struct fc_disc_port - temporary discovery port to hold rport identifiers 12042e9a92fSRobert Love * @lp: Fibre Channel host port instance 1219737e6a7SRobert Love * @peers: Node for list management during discovery and RSCN processing 1229737e6a7SRobert Love * @rport_work: Work struct for starting the rport state machine 1239737e6a7SRobert Love * @port_id: Port ID of the discovered port 12442e9a92fSRobert Love */ 12542e9a92fSRobert Love struct fc_disc_port { 12642e9a92fSRobert Love struct fc_lport *lp; 12742e9a92fSRobert Love struct list_head peers; 12842e9a92fSRobert Love struct work_struct rport_work; 1299737e6a7SRobert Love u32 port_id; 13042e9a92fSRobert Love }; 13142e9a92fSRobert Love 1323a3b42bfSRobert Love /** 1333a3b42bfSRobert Love * enum fc_rport_event - Remote port events 1343a3b42bfSRobert Love * @RPORT_EV_NONE: No event 1353a3b42bfSRobert Love * @RPORT_EV_READY: Remote port is ready for use 1363a3b42bfSRobert Love * @RPORT_EV_FAILED: State machine failed, remote port is not ready 1373a3b42bfSRobert Love * @RPORT_EV_STOP: Remote port has been stopped 1383a3b42bfSRobert Love * @RPORT_EV_LOGO: Remote port logout (LOGO) sent 1393a3b42bfSRobert Love */ 14042e9a92fSRobert Love enum fc_rport_event { 14142e9a92fSRobert Love RPORT_EV_NONE = 0, 1424c0f62b5SJoe Eykholt RPORT_EV_READY, 14342e9a92fSRobert Love RPORT_EV_FAILED, 14442e9a92fSRobert Love RPORT_EV_STOP, 14542e9a92fSRobert Love RPORT_EV_LOGO 14642e9a92fSRobert Love }; 14742e9a92fSRobert Love 1489fb9d328SJoe Eykholt struct fc_rport_priv; 1499fb9d328SJoe Eykholt 1503a3b42bfSRobert Love /** 1513a3b42bfSRobert Love * struct fc_rport_operations - Operations for a remote port 1523a3b42bfSRobert Love * @event_callback: Function to be called for remote port events 1533a3b42bfSRobert Love */ 15442e9a92fSRobert Love struct fc_rport_operations { 1559fb9d328SJoe Eykholt void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, 15642e9a92fSRobert Love enum fc_rport_event); 15742e9a92fSRobert Love }; 15842e9a92fSRobert Love 15942e9a92fSRobert Love /** 16042e9a92fSRobert Love * struct fc_rport_libfc_priv - libfc internal information about a remote port 1613a3b42bfSRobert Love * @local_port: The associated local port 1623a3b42bfSRobert Love * @rp_state: Indicates READY for I/O or DELETE when blocked 1639e9d0452SJoe Eykholt * @flags: REC and RETRY supported flags 1643a3b42bfSRobert Love * @e_d_tov: Error detect timeout value (in msec) 1653a3b42bfSRobert Love * @r_a_tov: Resource allocation timeout value (in msec) 1669e9d0452SJoe Eykholt */ 1679e9d0452SJoe Eykholt struct fc_rport_libfc_priv { 1689e9d0452SJoe Eykholt struct fc_lport *local_port; 1699e9d0452SJoe Eykholt enum fc_rport_state rp_state; 1709e9d0452SJoe Eykholt u16 flags; 1719e9d0452SJoe Eykholt #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) 1729e9d0452SJoe Eykholt #define FC_RP_FLAGS_RETRY (1 << 1) 1734b2164d4SJoe Eykholt #define FC_RP_STARTED (1 << 2) 17475a2792dSBhanu Prakash Gollapudi #define FC_RP_FLAGS_CONF_REQ (1 << 3) 1759e9d0452SJoe Eykholt unsigned int e_d_tov; 1769e9d0452SJoe Eykholt unsigned int r_a_tov; 1779e9d0452SJoe Eykholt }; 1789e9d0452SJoe Eykholt 1799e9d0452SJoe Eykholt /** 1803a3b42bfSRobert Love * struct fc_rport_priv - libfc remote port and discovery info 1813a3b42bfSRobert Love * @local_port: The associated local port 1823a3b42bfSRobert Love * @rport: The FC transport remote port 1833a3b42bfSRobert Love * @kref: Reference counter 1843a3b42bfSRobert Love * @rp_state: Enumeration that tracks progress of PLOGI, PRLI, 1853a3b42bfSRobert Love * and RTV exchanges 1863a3b42bfSRobert Love * @ids: The remote port identifiers and roles 1874b2164d4SJoe Eykholt * @flags: STARTED, REC and RETRY_SUPPORTED flags 1883a3b42bfSRobert Love * @max_seq: Maximum number of concurrent sequences 1893a3b42bfSRobert Love * @disc_id: The discovery identifier 1903a3b42bfSRobert Love * @maxframe_size: The maximum frame size 1913a3b42bfSRobert Love * @retries: The retry count for the current state 192f034260dSJoe Eykholt * @major_retries: The retry count for the entire PLOGI/PRLI state machine 1933a3b42bfSRobert Love * @e_d_tov: Error detect timeout value (in msec) 1943a3b42bfSRobert Love * @r_a_tov: Resource allocation timeout value (in msec) 1953a3b42bfSRobert Love * @rp_mutex: The mutex that protects the remote port 1963a3b42bfSRobert Love * @retry_work: Handle for retries 1973a3b42bfSRobert Love * @event_callback: Callback when READY, FAILED or LOGO states complete 19896ad8464SJoe Eykholt * @prli_count: Count of open PRLI sessions in providers 19942e90414SJoe Eykholt * @rcu: Structure used for freeing in an RCU-safe manner 20042e9a92fSRobert Love */ 2019e9d0452SJoe Eykholt struct fc_rport_priv { 20242e9a92fSRobert Love struct fc_lport *local_port; 203f211fa51SJoe Eykholt struct fc_rport *rport; 204f211fa51SJoe Eykholt struct kref kref; 20542e9a92fSRobert Love enum fc_rport_state rp_state; 206f211fa51SJoe Eykholt struct fc_rport_identifiers ids; 20742e9a92fSRobert Love u16 flags; 20842e9a92fSRobert Love u16 max_seq; 2090f6c6149SJoe Eykholt u16 disc_id; 210f211fa51SJoe Eykholt u16 maxframe_size; 21142e9a92fSRobert Love unsigned int retries; 212f034260dSJoe Eykholt unsigned int major_retries; 21342e9a92fSRobert Love unsigned int e_d_tov; 21442e9a92fSRobert Love unsigned int r_a_tov; 21542e9a92fSRobert Love struct mutex rp_mutex; 21642e9a92fSRobert Love struct delayed_work retry_work; 21742e9a92fSRobert Love enum fc_rport_event event; 21842e9a92fSRobert Love struct fc_rport_operations *ops; 21942e9a92fSRobert Love struct list_head peers; 22042e9a92fSRobert Love struct work_struct event_work; 221f211fa51SJoe Eykholt u32 supported_classes; 22296ad8464SJoe Eykholt u16 prli_count; 22342e90414SJoe Eykholt struct rcu_head rcu; 22475a2792dSBhanu Prakash Gollapudi u16 sp_features; 22575a2792dSBhanu Prakash Gollapudi u8 spp_type; 22675a2792dSBhanu Prakash Gollapudi void (*lld_event_callback)(struct fc_lport *, 22775a2792dSBhanu Prakash Gollapudi struct fc_rport_priv *, 22875a2792dSBhanu Prakash Gollapudi enum fc_rport_event); 22942e9a92fSRobert Love }; 23042e9a92fSRobert Love 2313a3b42bfSRobert Love /** 2321bd49b48SVasu Dev * struct fc_stats - fc stats structure 2333a3b42bfSRobert Love * @SecondsSinceLastReset: Seconds since the last reset 2343a3b42bfSRobert Love * @TxFrames: Number of transmitted frames 2353a3b42bfSRobert Love * @TxWords: Number of transmitted words 2363a3b42bfSRobert Love * @RxFrames: Number of received frames 2373a3b42bfSRobert Love * @RxWords: Number of received words 2383a3b42bfSRobert Love * @ErrorFrames: Number of received error frames 2393a3b42bfSRobert Love * @DumpedFrames: Number of dumped frames 2400f02a665SVasu Dev * @FcpPktAllocFails: Number of fcp packet allocation failures 2410f02a665SVasu Dev * @FcpPktAborts: Number of fcp packet aborts 2420f02a665SVasu Dev * @FcpFrameAllocFails: Number of fcp frame allocation failures 2433a3b42bfSRobert Love * @LinkFailureCount: Number of link failures 2443a3b42bfSRobert Love * @LossOfSignalCount: Number for signal losses 2453a3b42bfSRobert Love * @InvalidTxWordCount: Number of invalid transmitted words 2463a3b42bfSRobert Love * @InvalidCRCCount: Number of invalid CRCs 2473a3b42bfSRobert Love * @InputRequests: Number of input requests 2483a3b42bfSRobert Love * @OutputRequests: Number of output requests 2493a3b42bfSRobert Love * @ControlRequests: Number of control requests 2505f0e385fSJoe Eykholt * @InputBytes: Number of received bytes 2515f0e385fSJoe Eykholt * @OutputBytes: Number of transmitted bytes 2526580bbd0SYi Zou * @VLinkFailureCount: Number of virtual link failures 2536580bbd0SYi Zou * @MissDiscAdvCount: Number of missing FIP discovery advertisement 25442e9a92fSRobert Love */ 2551bd49b48SVasu Dev struct fc_stats { 25642e9a92fSRobert Love u64 SecondsSinceLastReset; 25742e9a92fSRobert Love u64 TxFrames; 25842e9a92fSRobert Love u64 TxWords; 25942e9a92fSRobert Love u64 RxFrames; 26042e9a92fSRobert Love u64 RxWords; 26142e9a92fSRobert Love u64 ErrorFrames; 26242e9a92fSRobert Love u64 DumpedFrames; 2630f02a665SVasu Dev u64 FcpPktAllocFails; 2640f02a665SVasu Dev u64 FcpPktAborts; 2650f02a665SVasu Dev u64 FcpFrameAllocFails; 26642e9a92fSRobert Love u64 LinkFailureCount; 26742e9a92fSRobert Love u64 LossOfSignalCount; 26842e9a92fSRobert Love u64 InvalidTxWordCount; 26942e9a92fSRobert Love u64 InvalidCRCCount; 27042e9a92fSRobert Love u64 InputRequests; 27142e9a92fSRobert Love u64 OutputRequests; 27242e9a92fSRobert Love u64 ControlRequests; 2735f0e385fSJoe Eykholt u64 InputBytes; 2745f0e385fSJoe Eykholt u64 OutputBytes; 2756580bbd0SYi Zou u64 VLinkFailureCount; 2766580bbd0SYi Zou u64 MissDiscAdvCount; 27742e9a92fSRobert Love }; 27842e9a92fSRobert Love 2793a3b42bfSRobert Love /** 2803a3b42bfSRobert Love * struct fc_seq_els_data - ELS data used for passing ELS specific responses 2813a3b42bfSRobert Love * @reason: The reason for rejection 28225985edcSLucas De Marchi * @explan: The explanation of the rejection 2833a3b42bfSRobert Love * 2843a3b42bfSRobert Love * Mainly used by the exchange manager layer. 28542e9a92fSRobert Love */ 28642e9a92fSRobert Love struct fc_seq_els_data { 28742e9a92fSRobert Love enum fc_els_rjt_reason reason; 28842e9a92fSRobert Love enum fc_els_rjt_explan explan; 28942e9a92fSRobert Love }; 29042e9a92fSRobert Love 2913a3b42bfSRobert Love /** 2923a3b42bfSRobert Love * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request) 2933a3b42bfSRobert Love * @lp: The associated local port 2943a3b42bfSRobert Love * @state: The state of the I/O 2953a3b42bfSRobert Love * @ref_cnt: Reference count 2963a3b42bfSRobert Love * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the 2973a3b42bfSRobert Love * host_lock if both are to be held at the same time) 2983a3b42bfSRobert Love * @cmd: The SCSI command (set and clear with the host_lock held) 2993a3b42bfSRobert Love * @list: Tracks queued commands (accessed with the host_lock held) 3003a3b42bfSRobert Love * @timer: The command timer 3013a3b42bfSRobert Love * @tm_done: Completion indicator 3023a3b42bfSRobert Love * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies) 3033a3b42bfSRobert Love * @data_len: The length of the data 3043a3b42bfSRobert Love * @cdb_cmd: The CDB command 3053a3b42bfSRobert Love * @xfer_len: The transfer length 3063a3b42bfSRobert Love * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange 3073a3b42bfSRobert Love * will be set here if DDP was setup) 3083a3b42bfSRobert Love * @xfer_contig_end: The offset into the buffer if the buffer is contiguous 3093a3b42bfSRobert Love * (Tx and Rx) 3103a3b42bfSRobert Love * @max_payload: The maximum payload size (in bytes) 3113a3b42bfSRobert Love * @io_status: SCSI result (upper 24 bits) 3123a3b42bfSRobert Love * @cdb_status: CDB status 3133a3b42bfSRobert Love * @status_code: FCP I/O status 3143a3b42bfSRobert Love * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun) 3153a3b42bfSRobert Love * @req_flags: Request flags (bit 0: read bit:1 write) 3163a3b42bfSRobert Love * @scsi_resid: SCSI residule length 3173a3b42bfSRobert Love * @rport: The remote port that the SCSI command is targeted at 3183a3b42bfSRobert Love * @seq_ptr: The sequence that will carry the SCSI command 3193a3b42bfSRobert Love * @recov_retry: Number of recovery retries 3203a3b42bfSRobert Love * @recov_seq: The sequence for REC or SRR 32142e9a92fSRobert Love */ 32242e9a92fSRobert Love struct fc_fcp_pkt { 3233a3b42bfSRobert Love spinlock_t scsi_pkt_lock; 324ed26cfecSVasu Dev atomic_t ref_cnt; 325ed26cfecSVasu Dev 326ed26cfecSVasu Dev /* SCSI command and data transfer information */ 327ed26cfecSVasu Dev u32 data_len; 3283a3b42bfSRobert Love 3293a3b42bfSRobert Love /* SCSI I/O related information */ 3303a3b42bfSRobert Love struct scsi_cmnd *cmd; 3313a3b42bfSRobert Love struct list_head list; 3323a3b42bfSRobert Love 333ed26cfecSVasu Dev /* Housekeeping information */ 334ed26cfecSVasu Dev struct fc_lport *lp; 335ed26cfecSVasu Dev u8 state; 33642e9a92fSRobert Love 3373a3b42bfSRobert Love /* SCSI/FCP return status */ 33842e9a92fSRobert Love u8 cdb_status; 3393a3b42bfSRobert Love u8 status_code; 34042e9a92fSRobert Love u8 scsi_comp_flags; 341ed26cfecSVasu Dev u32 io_status; 3423a3b42bfSRobert Love u32 req_flags; 3433a3b42bfSRobert Love u32 scsi_resid; 34442e9a92fSRobert Love 345ed26cfecSVasu Dev /* Transport related veriables */ 346ed26cfecSVasu Dev size_t xfer_len; 347ed26cfecSVasu Dev struct fcp_cmnd cdb_cmd; 348ed26cfecSVasu Dev u32 xfer_contig_end; 349ed26cfecSVasu Dev u16 max_payload; 350ed26cfecSVasu Dev u16 xfer_ddp; 351ed26cfecSVasu Dev 3523a3b42bfSRobert Love /* Associated structures */ 3533a3b42bfSRobert Love struct fc_rport *rport; 3543a3b42bfSRobert Love struct fc_seq *seq_ptr; 3553a3b42bfSRobert Love 356ed26cfecSVasu Dev /* Timeout/error related information */ 357ed26cfecSVasu Dev struct timer_list timer; 358ed26cfecSVasu Dev int wait_for_comp; 359ad3120cfSHannes Reinecke int timer_delay; 360ed26cfecSVasu Dev u32 recov_retry; 3613a3b42bfSRobert Love struct fc_seq *recov_seq; 362ed26cfecSVasu Dev struct completion tm_done; 363ed26cfecSVasu Dev } ____cacheline_aligned_in_smp; 36442e9a92fSRobert Love 36542e9a92fSRobert Love /* 36642e9a92fSRobert Love * Structure and function definitions for managing Fibre Channel Exchanges 36742e9a92fSRobert Love * and Sequences 36842e9a92fSRobert Love * 36942e9a92fSRobert Love * fc_exch holds state for one exchange and links to its active sequence. 37042e9a92fSRobert Love * 37142e9a92fSRobert Love * fc_seq holds the state for an individual sequence. 37242e9a92fSRobert Love */ 37342e9a92fSRobert Love 37442e9a92fSRobert Love struct fc_exch_mgr; 37596316099SVasu Dev struct fc_exch_mgr_anchor; 376e4bc50beSVasu Dev extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ 37742e9a92fSRobert Love 3783a3b42bfSRobert Love /** 3793a3b42bfSRobert Love * struct fc_seq - FC sequence 3803a3b42bfSRobert Love * @id: The sequence ID 3813a3b42bfSRobert Love * @ssb_stat: Status flags for the sequence status block (SSB) 3823a3b42bfSRobert Love * @cnt: Number of frames sent so far 3833a3b42bfSRobert Love * @rec_data: FC-4 value for REC 38442e9a92fSRobert Love */ 38542e9a92fSRobert Love struct fc_seq { 3863a3b42bfSRobert Love u8 id; 3873a3b42bfSRobert Love u16 ssb_stat; 3883a3b42bfSRobert Love u16 cnt; 3893a3b42bfSRobert Love u32 rec_data; 39042e9a92fSRobert Love }; 39142e9a92fSRobert Love 39242e9a92fSRobert Love #define FC_EX_DONE (1 << 0) /* ep is completed */ 39342e9a92fSRobert Love #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ 3949ca1e182SHannes Reinecke #define FC_EX_QUARANTINE (1 << 2) /* exch is quarantined */ 39542e9a92fSRobert Love 3963a3b42bfSRobert Love /** 3973a3b42bfSRobert Love * struct fc_exch - Fibre Channel Exchange 3983a3b42bfSRobert Love * @em: Exchange manager 3993a3b42bfSRobert Love * @pool: Exchange pool 4003a3b42bfSRobert Love * @state: The exchange's state 4013a3b42bfSRobert Love * @xid: The exchange ID 4023a3b42bfSRobert Love * @ex_list: Handle used by the EM to track free exchanges 4033a3b42bfSRobert Love * @ex_lock: Lock that protects the exchange 4043a3b42bfSRobert Love * @ex_refcnt: Reference count 4053a3b42bfSRobert Love * @timeout_work: Handle for timeout handler 4063a3b42bfSRobert Love * @lp: The local port that this exchange is on 4073a3b42bfSRobert Love * @oxid: Originator's exchange ID 4083a3b42bfSRobert Love * @rxid: Responder's exchange ID 4093a3b42bfSRobert Love * @oid: Originator's FCID 4103a3b42bfSRobert Love * @sid: Source FCID 4113a3b42bfSRobert Love * @did: Destination FCID 4123a3b42bfSRobert Love * @esb_stat: ESB exchange status 4133a3b42bfSRobert Love * @r_a_tov: Resouce allocation time out value (in msecs) 4143a3b42bfSRobert Love * @seq_id: The next sequence ID to use 415f60e12e9SJoe Eykholt * @encaps: encapsulation information for lower-level driver 4163a3b42bfSRobert Love * @f_ctl: F_CTL flags for the sequence 4173a3b42bfSRobert Love * @fh_type: The frame type 4183a3b42bfSRobert Love * @class: The class of service 4193a3b42bfSRobert Love * @seq: The sequence in use on this exchange 4207030fd62SBart Van Assche * @resp_active: Number of tasks that are concurrently executing @resp(). 4217030fd62SBart Van Assche * @resp_task: If @resp_active > 0, either the task executing @resp(), the 4227030fd62SBart Van Assche * task that has been interrupted to execute the soft-IRQ 4237030fd62SBart Van Assche * executing @resp() or NULL if more than one task is executing 4247030fd62SBart Van Assche * @resp concurrently. 4257030fd62SBart Van Assche * @resp_wq: Waitqueue for the tasks waiting on @resp_active. 4263a3b42bfSRobert Love * @resp: Callback for responses on this exchange 4273a3b42bfSRobert Love * @destructor: Called when destroying the exchange 4283a3b42bfSRobert Love * @arg: Passed as a void pointer to the resp() callback 42942e9a92fSRobert Love * 43042e9a92fSRobert Love * Locking notes: The ex_lock protects following items: 43142e9a92fSRobert Love * state, esb_stat, f_ctl, seq.ssb_stat 43242e9a92fSRobert Love * seq_id 43342e9a92fSRobert Love * sequence allocation 43442e9a92fSRobert Love */ 43542e9a92fSRobert Love struct fc_exch { 4363a3b42bfSRobert Love spinlock_t ex_lock; 4373a3b42bfSRobert Love atomic_t ex_refcnt; 43849a19889SVasu Dev enum fc_class class; 43949a19889SVasu Dev struct fc_exch_mgr *em; 44049a19889SVasu Dev struct fc_exch_pool *pool; 44149a19889SVasu Dev struct list_head ex_list; 4423a3b42bfSRobert Love struct fc_lport *lp; 44349a19889SVasu Dev u32 esb_stat; 44449a19889SVasu Dev u8 state; 44549a19889SVasu Dev u8 fh_type; 44649a19889SVasu Dev u8 seq_id; 44749a19889SVasu Dev u8 encaps; 44849a19889SVasu Dev u16 xid; 4493a3b42bfSRobert Love u16 oxid; 4503a3b42bfSRobert Love u16 rxid; 4513a3b42bfSRobert Love u32 oid; 4523a3b42bfSRobert Love u32 sid; 4533a3b42bfSRobert Love u32 did; 4543a3b42bfSRobert Love u32 r_a_tov; 4553a3b42bfSRobert Love u32 f_ctl; 4563a3b42bfSRobert Love struct fc_seq seq; 4577030fd62SBart Van Assche int resp_active; 4587030fd62SBart Van Assche struct task_struct *resp_task; 4597030fd62SBart Van Assche wait_queue_head_t resp_wq; 46042e9a92fSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *, void *); 46142e9a92fSRobert Love void *arg; 4623a3b42bfSRobert Love void (*destructor)(struct fc_seq *, void *); 46349a19889SVasu Dev struct delayed_work timeout_work; 46449a19889SVasu Dev } ____cacheline_aligned_in_smp; 46542e9a92fSRobert Love #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) 46642e9a92fSRobert Love 46742e9a92fSRobert Love 4683a3b42bfSRobert Love struct libfc_function_template { 46942e9a92fSRobert Love /* 47042e9a92fSRobert Love * Interface to send a FC frame 4710ae4d4aeSRobert Love * 4720ae4d4aeSRobert Love * STATUS: REQUIRED 47342e9a92fSRobert Love */ 4743a3b42bfSRobert Love int (*frame_send)(struct fc_lport *, struct fc_frame *); 47542e9a92fSRobert Love 47642e9a92fSRobert Love /* 4770ae4d4aeSRobert Love * Interface to send ELS/CT frames 4780ae4d4aeSRobert Love * 4790ae4d4aeSRobert Love * STATUS: OPTIONAL 48042e9a92fSRobert Love */ 4813a3b42bfSRobert Love struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did, 4823a3b42bfSRobert Love struct fc_frame *, unsigned int op, 48342e9a92fSRobert Love void (*resp)(struct fc_seq *, 4843a3b42bfSRobert Love struct fc_frame *, void *arg), 48542e9a92fSRobert Love void *arg, u32 timer_msec); 48642e9a92fSRobert Love 48742e9a92fSRobert Love /* 488b277d2aaSYi Zou * Sets up the DDP context for a given exchange id on the given 489b277d2aaSYi Zou * scatterlist if LLD supports DDP for large receive. 490b277d2aaSYi Zou * 491b277d2aaSYi Zou * STATUS: OPTIONAL 492b277d2aaSYi Zou */ 4933a3b42bfSRobert Love int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *, 4943a3b42bfSRobert Love unsigned int); 495b277d2aaSYi Zou /* 496b277d2aaSYi Zou * Completes the DDP transfer and returns the length of data DDPed 497b277d2aaSYi Zou * for the given exchange id. 498b277d2aaSYi Zou * 499b277d2aaSYi Zou * STATUS: OPTIONAL 500b277d2aaSYi Zou */ 5013a3b42bfSRobert Love int (*ddp_done)(struct fc_lport *, u16); 502b277d2aaSYi Zou /* 50333dc362bSYi Zou * Sets up the DDP context for a given exchange id on the given 5041bd49b48SVasu Dev * scatterlist if LLD supports DDP for target. 50533dc362bSYi Zou * 50633dc362bSYi Zou * STATUS: OPTIONAL 50733dc362bSYi Zou */ 50833dc362bSYi Zou int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *, 50933dc362bSYi Zou unsigned int); 51033dc362bSYi Zou /* 511b84056bfSYi Zou * Allow LLD to fill its own Link Error Status Block 512b84056bfSYi Zou * 513b84056bfSYi Zou * STATUS: OPTIONAL 514b84056bfSYi Zou */ 515b84056bfSYi Zou void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb); 516b84056bfSYi Zou /* 5170ae4d4aeSRobert Love * Send a frame using an existing sequence and exchange. 5180ae4d4aeSRobert Love * 5190ae4d4aeSRobert Love * STATUS: OPTIONAL 52042e9a92fSRobert Love */ 5213a3b42bfSRobert Love int (*seq_send)(struct fc_lport *, struct fc_seq *, 5223a3b42bfSRobert Love struct fc_frame *); 52342e9a92fSRobert Love 52442e9a92fSRobert Love /* 52542e9a92fSRobert Love * Abort an exchange and sequence. Generally called because of a 52642e9a92fSRobert Love * exchange timeout or an abort from the upper layer. 52742e9a92fSRobert Love * 52842e9a92fSRobert Love * A timer_msec can be specified for abort timeout, if non-zero 52942e9a92fSRobert Love * timer_msec value is specified then exchange resp handler 53042e9a92fSRobert Love * will be called with timeout error if no response to abort. 5310ae4d4aeSRobert Love * 5320ae4d4aeSRobert Love * STATUS: OPTIONAL 53342e9a92fSRobert Love */ 5343a3b42bfSRobert Love int (*seq_exch_abort)(const struct fc_seq *, 53542e9a92fSRobert Love unsigned int timer_msec); 53642e9a92fSRobert Love 53742e9a92fSRobert Love /* 53842e9a92fSRobert Love * Indicate that an exchange/sequence tuple is complete and the memory 53942e9a92fSRobert Love * allocated for the related objects may be freed. 5400ae4d4aeSRobert Love * 5410ae4d4aeSRobert Love * STATUS: OPTIONAL 54242e9a92fSRobert Love */ 5433a3b42bfSRobert Love void (*exch_done)(struct fc_seq *); 54442e9a92fSRobert Love 54542e9a92fSRobert Love /* 54642e9a92fSRobert Love * Start a new sequence on the same exchange/sequence tuple. 5470ae4d4aeSRobert Love * 5480ae4d4aeSRobert Love * STATUS: OPTIONAL 54942e9a92fSRobert Love */ 5503a3b42bfSRobert Love struct fc_seq *(*seq_start_next)(struct fc_seq *); 55142e9a92fSRobert Love 55242e9a92fSRobert Love /* 5531a5c2d7eSJoe Eykholt * Set a response handler for the exchange of the sequence. 5541a5c2d7eSJoe Eykholt * 5551a5c2d7eSJoe Eykholt * STATUS: OPTIONAL 5561a5c2d7eSJoe Eykholt */ 5571a5c2d7eSJoe Eykholt void (*seq_set_resp)(struct fc_seq *sp, 5581a5c2d7eSJoe Eykholt void (*resp)(struct fc_seq *, struct fc_frame *, 5591a5c2d7eSJoe Eykholt void *), 5601a5c2d7eSJoe Eykholt void *arg); 5611a5c2d7eSJoe Eykholt 5621a5c2d7eSJoe Eykholt /* 563239e8104SJoe Eykholt * Assign a sequence for an incoming request frame. 564239e8104SJoe Eykholt * 565239e8104SJoe Eykholt * STATUS: OPTIONAL 566239e8104SJoe Eykholt */ 567239e8104SJoe Eykholt struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *); 568239e8104SJoe Eykholt 569239e8104SJoe Eykholt /* 57062bdb645SJoe Eykholt * Release the reference on the sequence returned by seq_assign(). 57162bdb645SJoe Eykholt * 57262bdb645SJoe Eykholt * STATUS: OPTIONAL 57362bdb645SJoe Eykholt */ 57462bdb645SJoe Eykholt void (*seq_release)(struct fc_seq *); 57562bdb645SJoe Eykholt 57662bdb645SJoe Eykholt /* 57742e9a92fSRobert Love * Reset an exchange manager, completing all sequences and exchanges. 57842e9a92fSRobert Love * If s_id is non-zero, reset only exchanges originating from that FID. 57942e9a92fSRobert Love * If d_id is non-zero, reset only exchanges sending to that FID. 5800ae4d4aeSRobert Love * 5810ae4d4aeSRobert Love * STATUS: OPTIONAL 58242e9a92fSRobert Love */ 5833a3b42bfSRobert Love void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id); 58442e9a92fSRobert Love 5850ae4d4aeSRobert Love /* 5860ae4d4aeSRobert Love * Flush the rport work queue. Generally used before shutdown. 5870ae4d4aeSRobert Love * 5880ae4d4aeSRobert Love * STATUS: OPTIONAL 58942e9a92fSRobert Love */ 5900ae4d4aeSRobert Love void (*rport_flush_queue)(void); 59142e9a92fSRobert Love 59242e9a92fSRobert Love /* 593093bb6a2SJoe Eykholt * Set the local port FC_ID. 594093bb6a2SJoe Eykholt * 595093bb6a2SJoe Eykholt * This may be provided by the LLD to allow it to be 596093bb6a2SJoe Eykholt * notified when the local port is assigned a FC-ID. 597093bb6a2SJoe Eykholt * 598093bb6a2SJoe Eykholt * The frame, if non-NULL, is the incoming frame with the 599093bb6a2SJoe Eykholt * FLOGI LS_ACC or FLOGI, and may contain the granted MAC 600093bb6a2SJoe Eykholt * address for the LLD. The frame pointer may be NULL if 601093bb6a2SJoe Eykholt * no MAC is associated with this assignment (LOGO or PLOGI). 602093bb6a2SJoe Eykholt * 603093bb6a2SJoe Eykholt * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid. 604093bb6a2SJoe Eykholt * 605093bb6a2SJoe Eykholt * Note: this is called with the local port mutex held. 606093bb6a2SJoe Eykholt * 607093bb6a2SJoe Eykholt * STATUS: OPTIONAL 608093bb6a2SJoe Eykholt */ 609093bb6a2SJoe Eykholt void (*lport_set_port_id)(struct fc_lport *, u32 port_id, 610093bb6a2SJoe Eykholt struct fc_frame *); 611093bb6a2SJoe Eykholt 612093bb6a2SJoe Eykholt /* 6139737e6a7SRobert Love * Create a remote port with a given port ID 6149737e6a7SRobert Love * 6159737e6a7SRobert Love * STATUS: OPTIONAL 6165101ff99SRobert Love */ 6179737e6a7SRobert Love struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); 6185101ff99SRobert Love 6195101ff99SRobert Love /* 62042e9a92fSRobert Love * Initiates the RP state machine. It is called from the LP module. 62142e9a92fSRobert Love * This function will issue the following commands to the N_Port 62242e9a92fSRobert Love * identified by the FC ID provided. 62342e9a92fSRobert Love * 62442e9a92fSRobert Love * - PLOGI 62542e9a92fSRobert Love * - PRLI 62642e9a92fSRobert Love * - RTV 6270ae4d4aeSRobert Love * 6280ae4d4aeSRobert Love * STATUS: OPTIONAL 62942e9a92fSRobert Love */ 6309fb9d328SJoe Eykholt int (*rport_login)(struct fc_rport_priv *); 63142e9a92fSRobert Love 63242e9a92fSRobert Love /* 63342e9a92fSRobert Love * Logoff, and remove the rport from the transport if 63442e9a92fSRobert Love * it had been added. This will send a LOGO to the target. 6350ae4d4aeSRobert Love * 6360ae4d4aeSRobert Love * STATUS: OPTIONAL 63742e9a92fSRobert Love */ 6389fb9d328SJoe Eykholt int (*rport_logoff)(struct fc_rport_priv *); 63942e9a92fSRobert Love 64042e9a92fSRobert Love /* 64125985edcSLucas De Marchi * Receive a request from a remote port. 6420ae4d4aeSRobert Love * 6430ae4d4aeSRobert Love * STATUS: OPTIONAL 64442e9a92fSRobert Love */ 64592261156SJoe Eykholt void (*rport_recv_req)(struct fc_lport *, struct fc_frame *); 64642e9a92fSRobert Love 6470ae4d4aeSRobert Love /* 6480ae4d4aeSRobert Love * lookup an rport by it's port ID. 6490ae4d4aeSRobert Love * 6500ae4d4aeSRobert Love * STATUS: OPTIONAL 65142e9a92fSRobert Love */ 6529fb9d328SJoe Eykholt struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); 65342e9a92fSRobert Love 65442e9a92fSRobert Love /* 655f211fa51SJoe Eykholt * Destroy an rport after final kref_put(). 656f211fa51SJoe Eykholt * The argument is a pointer to the kref inside the fc_rport_priv. 657f211fa51SJoe Eykholt */ 658f211fa51SJoe Eykholt void (*rport_destroy)(struct kref *); 659f211fa51SJoe Eykholt 660f211fa51SJoe Eykholt /* 66175a2792dSBhanu Prakash Gollapudi * Callback routine after the remote port is logged in 66275a2792dSBhanu Prakash Gollapudi * 66375a2792dSBhanu Prakash Gollapudi * STATUS: OPTIONAL 66475a2792dSBhanu Prakash Gollapudi */ 66575a2792dSBhanu Prakash Gollapudi void (*rport_event_callback)(struct fc_lport *, 66675a2792dSBhanu Prakash Gollapudi struct fc_rport_priv *, 66775a2792dSBhanu Prakash Gollapudi enum fc_rport_event); 66875a2792dSBhanu Prakash Gollapudi 66975a2792dSBhanu Prakash Gollapudi /* 67042e9a92fSRobert Love * Send a fcp cmd from fsp pkt. 67142e9a92fSRobert Love * Called with the SCSI host lock unlocked and irqs disabled. 67242e9a92fSRobert Love * 67342e9a92fSRobert Love * The resp handler is called when FCP_RSP received. 67442e9a92fSRobert Love * 6750ae4d4aeSRobert Love * STATUS: OPTIONAL 67642e9a92fSRobert Love */ 6773a3b42bfSRobert Love int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *, 6783a3b42bfSRobert Love void (*resp)(struct fc_seq *, struct fc_frame *, 6793a3b42bfSRobert Love void *)); 68042e9a92fSRobert Love 68142e9a92fSRobert Love /* 68225985edcSLucas De Marchi * Cleanup the FCP layer, used during link down and reset 6830ae4d4aeSRobert Love * 6840ae4d4aeSRobert Love * STATUS: OPTIONAL 68542e9a92fSRobert Love */ 6863a3b42bfSRobert Love void (*fcp_cleanup)(struct fc_lport *); 68742e9a92fSRobert Love 68842e9a92fSRobert Love /* 68942e9a92fSRobert Love * Abort all I/O on a local port 6900ae4d4aeSRobert Love * 6910ae4d4aeSRobert Love * STATUS: OPTIONAL 69242e9a92fSRobert Love */ 6933a3b42bfSRobert Love void (*fcp_abort_io)(struct fc_lport *); 69442e9a92fSRobert Love 6950ae4d4aeSRobert Love /* 6960ae4d4aeSRobert Love * Receive a request for the discovery layer. 6970ae4d4aeSRobert Love * 6980ae4d4aeSRobert Love * STATUS: OPTIONAL 69942e9a92fSRobert Love */ 70092261156SJoe Eykholt void (*disc_recv_req)(struct fc_lport *, struct fc_frame *); 70142e9a92fSRobert Love 70242e9a92fSRobert Love /* 70342e9a92fSRobert Love * Start discovery for a local port. 7040ae4d4aeSRobert Love * 7050ae4d4aeSRobert Love * STATUS: OPTIONAL 70642e9a92fSRobert Love */ 70742e9a92fSRobert Love void (*disc_start)(void (*disc_callback)(struct fc_lport *, 70842e9a92fSRobert Love enum fc_disc_event), 70942e9a92fSRobert Love struct fc_lport *); 71042e9a92fSRobert Love 71142e9a92fSRobert Love /* 71242e9a92fSRobert Love * Stop discovery for a given lport. This will remove 71342e9a92fSRobert Love * all discovered rports 7140ae4d4aeSRobert Love * 7150ae4d4aeSRobert Love * STATUS: OPTIONAL 71642e9a92fSRobert Love */ 71742e9a92fSRobert Love void (*disc_stop) (struct fc_lport *); 71842e9a92fSRobert Love 71942e9a92fSRobert Love /* 72042e9a92fSRobert Love * Stop discovery for a given lport. This will block 72142e9a92fSRobert Love * until all discovered rports are deleted from the 72242e9a92fSRobert Love * FC transport class 7230ae4d4aeSRobert Love * 7240ae4d4aeSRobert Love * STATUS: OPTIONAL 72542e9a92fSRobert Love */ 72642e9a92fSRobert Love void (*disc_stop_final) (struct fc_lport *); 72742e9a92fSRobert Love }; 72842e9a92fSRobert Love 7293a3b42bfSRobert Love /** 7303a3b42bfSRobert Love * struct fc_disc - Discovery context 7313a3b42bfSRobert Love * @retry_count: Number of retries 7323a3b42bfSRobert Love * @pending: 1 if discovery is pending, 0 if not 733c531b9b4SBhanu Prakash Gollapudi * @requested: 1 if discovery has been requested, 0 if not 7343a3b42bfSRobert Love * @seq_count: Number of sequences used for discovery 7353a3b42bfSRobert Love * @buf_len: Length of the discovery buffer 7363a3b42bfSRobert Love * @disc_id: Discovery ID 7373a3b42bfSRobert Love * @rports: List of discovered remote ports 7380685230cSJoe Eykholt * @priv: Private pointer for use by discovery code 7393a3b42bfSRobert Love * @disc_mutex: Mutex that protects the discovery context 7403a3b42bfSRobert Love * @partial_buf: Partial name buffer (if names are returned 7413a3b42bfSRobert Love * in multiple frames) 7423a3b42bfSRobert Love * @disc_work: handle for delayed work context 7433a3b42bfSRobert Love * @disc_callback: Callback routine called when discovery completes 7443a3b42bfSRobert Love */ 74542e9a92fSRobert Love struct fc_disc { 74642e9a92fSRobert Love unsigned char retry_count; 74742e9a92fSRobert Love unsigned char pending; 74842e9a92fSRobert Love unsigned char requested; 74942e9a92fSRobert Love unsigned short seq_count; 75042e9a92fSRobert Love unsigned char buf_len; 7510f6c6149SJoe Eykholt u16 disc_id; 75242e9a92fSRobert Love 75342e9a92fSRobert Love struct list_head rports; 7540685230cSJoe Eykholt void *priv; 75542e9a92fSRobert Love struct mutex disc_mutex; 7563a3b42bfSRobert Love struct fc_gpn_ft_resp partial_buf; 75742e9a92fSRobert Love struct delayed_work disc_work; 7583a3b42bfSRobert Love 7593a3b42bfSRobert Love void (*disc_callback)(struct fc_lport *, 7603a3b42bfSRobert Love enum fc_disc_event); 76142e9a92fSRobert Love }; 76242e9a92fSRobert Love 76370d53b04SJoe Eykholt /* 76470d53b04SJoe Eykholt * Local port notifier and events. 76570d53b04SJoe Eykholt */ 76670d53b04SJoe Eykholt extern struct blocking_notifier_head fc_lport_notifier_head; 76770d53b04SJoe Eykholt enum fc_lport_event { 76870d53b04SJoe Eykholt FC_LPORT_EV_ADD, 76970d53b04SJoe Eykholt FC_LPORT_EV_DEL, 77070d53b04SJoe Eykholt }; 77170d53b04SJoe Eykholt 7723a3b42bfSRobert Love /** 7733a3b42bfSRobert Love * struct fc_lport - Local port 7743a3b42bfSRobert Love * @host: The SCSI host associated with a local port 7753a3b42bfSRobert Love * @ema_list: Exchange manager anchor list 7763a3b42bfSRobert Love * @dns_rdata: The directory server remote port 777d78c317fSNeerav Parikh * @ms_rdata: The management server remote port 7783a3b42bfSRobert Love * @ptp_rdata: Point to point remote port 7793a3b42bfSRobert Love * @scsi_priv: FCP layer internal data 7803a3b42bfSRobert Love * @disc: Discovery context 7813a3b42bfSRobert Love * @vports: Child vports if N_Port 7823a3b42bfSRobert Love * @vport: Parent vport if VN_Port 7833a3b42bfSRobert Love * @tt: Libfc function template 7843a3b42bfSRobert Love * @link_up: Link state (1 = link up, 0 = link down) 7853a3b42bfSRobert Love * @qfull: Queue state (1 queue is full, 0 queue is not full) 7863a3b42bfSRobert Love * @state: Identifies the state 7873a3b42bfSRobert Love * @boot_time: Timestamp indicating when the local port came online 7883a3b42bfSRobert Love * @host_stats: SCSI host statistics 7891bd49b48SVasu Dev * @stats: FC local port stats (TODO separate libfc LLD stats) 7903a3b42bfSRobert Love * @retry_count: Number of retries in the current state 7917b2787ecSRobert Love * @port_id: FC Port ID 7923a3b42bfSRobert Love * @wwpn: World Wide Port Name 7933a3b42bfSRobert Love * @wwnn: World Wide Node Name 7943a3b42bfSRobert Love * @service_params: Common service parameters 7953a3b42bfSRobert Love * @e_d_tov: Error detection timeout value 7963a3b42bfSRobert Love * @r_a_tov: Resouce allocation timeout value 7973a3b42bfSRobert Love * @rnid_gen: RNID information 7983a3b42bfSRobert Love * @sg_supp: Indicates if scatter gather is supported 7993a3b42bfSRobert Love * @seq_offload: Indicates if sequence offload is supported 8003a3b42bfSRobert Love * @crc_offload: Indicates if CRC offload is supported 8013a3b42bfSRobert Love * @lro_enabled: Indicates if large receive offload is supported 8023a3b42bfSRobert Love * @does_npiv: Supports multiple vports 8033a3b42bfSRobert Love * @npiv_enabled: Switch/fabric allows NPIV 8043a3b42bfSRobert Love * @mfs: The maximum Fibre Channel payload size 8053a3b42bfSRobert Love * @max_retry_count: The maximum retry attempts 8063a3b42bfSRobert Love * @max_rport_retry_count: The maximum remote port retry attempts 807f90377abSJoe Eykholt * @rport_priv_size: Size needed by driver after struct fc_rport_priv 8083a3b42bfSRobert Love * @lro_xid: The maximum XID for LRO 8093a3b42bfSRobert Love * @lso_max: The maximum large offload send size 8103a3b42bfSRobert Love * @fcts: FC-4 type mask 8113a3b42bfSRobert Love * @lp_mutex: Mutex to protect the local port 81270d53b04SJoe Eykholt * @list: Linkage on list of vport peers 8133a3b42bfSRobert Love * @retry_work: Handle to local port for delayed retry context 814baf9fdf0SJoe Eykholt * @prov: Pointers available for use by passive FC-4 providers 81570d53b04SJoe Eykholt * @lport_list: Linkage on module-wide list of local ports 8163a3b42bfSRobert Love */ 81742e9a92fSRobert Love struct fc_lport { 81842e9a92fSRobert Love /* Associations */ 81942e9a92fSRobert Love struct Scsi_Host *host; 82096316099SVasu Dev struct list_head ema_list; 8213a3b42bfSRobert Love struct fc_rport_priv *dns_rdata; 822d78c317fSNeerav Parikh struct fc_rport_priv *ms_rdata; 8233a3b42bfSRobert Love struct fc_rport_priv *ptp_rdata; 82442e9a92fSRobert Love void *scsi_priv; 82542e9a92fSRobert Love struct fc_disc disc; 82642e9a92fSRobert Love 8273a3b42bfSRobert Love /* Virtual port information */ 8283a3b42bfSRobert Love struct list_head vports; 8293a3b42bfSRobert Love struct fc_vport *vport; 8303a3b42bfSRobert Love 83142e9a92fSRobert Love /* Operational Information */ 83242e9a92fSRobert Love struct libfc_function_template tt; 833bc0e17f6SVasu Dev u8 link_up; 834bc0e17f6SVasu Dev u8 qfull; 8359a6cf881SHannes Reinecke u16 vlan; 83642e9a92fSRobert Love enum fc_lport_state state; 83742e9a92fSRobert Love unsigned long boot_time; 83842e9a92fSRobert Love struct fc_host_statistics host_stats; 8391bd49b48SVasu Dev struct fc_stats __percpu *stats; 84042e9a92fSRobert Love u8 retry_count; 84142e9a92fSRobert Love 8423a3b42bfSRobert Love /* Fabric information */ 8437b2787ecSRobert Love u32 port_id; 8443a3b42bfSRobert Love u64 wwpn; 8453a3b42bfSRobert Love u64 wwnn; 84642e9a92fSRobert Love unsigned int service_params; 84742e9a92fSRobert Love unsigned int e_d_tov; 84842e9a92fSRobert Love unsigned int r_a_tov; 8493a3b42bfSRobert Love struct fc_els_rnid_gen rnid_gen; 8503a3b42bfSRobert Love 8513a3b42bfSRobert Love /* Capabilities */ 8523a3b42bfSRobert Love u32 sg_supp:1; 8533a3b42bfSRobert Love u32 seq_offload:1; 8543a3b42bfSRobert Love u32 crc_offload:1; 8553a3b42bfSRobert Love u32 lro_enabled:1; 8563a3b42bfSRobert Love u32 does_npiv:1; 8573a3b42bfSRobert Love u32 npiv_enabled:1; 8583726f358SJoe Eykholt u32 point_to_multipoint:1; 859d78c317fSNeerav Parikh u32 fdmi_enabled:1; 8603a3b42bfSRobert Love u32 mfs; 86142e9a92fSRobert Love u8 max_retry_count; 862a3666955SAbhijeet Joglekar u8 max_rport_retry_count; 863f90377abSJoe Eykholt u16 rport_priv_size; 86442e9a92fSRobert Love u16 link_speed; 86542e9a92fSRobert Love u16 link_supported_speeds; 8663a3b42bfSRobert Love u16 lro_xid; 8673a3b42bfSRobert Love unsigned int lso_max; 8683a3b42bfSRobert Love struct fc_ns_fts fcts; 86942e9a92fSRobert Love 87042e9a92fSRobert Love /* Miscellaneous */ 8713a3b42bfSRobert Love struct mutex lp_mutex; 8723a3b42bfSRobert Love struct list_head list; 87342e9a92fSRobert Love struct delayed_work retry_work; 874baf9fdf0SJoe Eykholt void *prov[FC_FC4_PROV_SIZE]; 87570d53b04SJoe Eykholt struct list_head lport_list; 87642e9a92fSRobert Love }; 87742e9a92fSRobert Love 87896ad8464SJoe Eykholt /** 87996ad8464SJoe Eykholt * struct fc4_prov - FC-4 provider registration 88096ad8464SJoe Eykholt * @prli: Handler for incoming PRLI 88196ad8464SJoe Eykholt * @prlo: Handler for session reset 88296ad8464SJoe Eykholt * @recv: Handler for incoming request 88396ad8464SJoe Eykholt * @module: Pointer to module. May be NULL. 88496ad8464SJoe Eykholt */ 88596ad8464SJoe Eykholt struct fc4_prov { 88696ad8464SJoe Eykholt int (*prli)(struct fc_rport_priv *, u32 spp_len, 88796ad8464SJoe Eykholt const struct fc_els_spp *spp_in, 88896ad8464SJoe Eykholt struct fc_els_spp *spp_out); 88996ad8464SJoe Eykholt void (*prlo)(struct fc_rport_priv *); 89096ad8464SJoe Eykholt void (*recv)(struct fc_lport *, struct fc_frame *); 89196ad8464SJoe Eykholt struct module *module; 89296ad8464SJoe Eykholt }; 89396ad8464SJoe Eykholt 89496ad8464SJoe Eykholt /* 89596ad8464SJoe Eykholt * Register FC-4 provider with libfc. 89696ad8464SJoe Eykholt */ 89796ad8464SJoe Eykholt int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *); 89896ad8464SJoe Eykholt void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *); 89996ad8464SJoe Eykholt 90034f42a07SRobert Love /* 90142e9a92fSRobert Love * FC_LPORT HELPER FUNCTIONS 90242e9a92fSRobert Love *****************************/ 9033a3b42bfSRobert Love 9043a3b42bfSRobert Love /** 9053a3b42bfSRobert Love * fc_lport_test_ready() - Determine if a local port is in the READY state 9063a3b42bfSRobert Love * @lport: The local port to test 9073a3b42bfSRobert Love */ 9083a3b42bfSRobert Love static inline int fc_lport_test_ready(struct fc_lport *lport) 90942e9a92fSRobert Love { 9103a3b42bfSRobert Love return lport->state == LPORT_ST_READY; 91142e9a92fSRobert Love } 91242e9a92fSRobert Love 9133a3b42bfSRobert Love /** 9143a3b42bfSRobert Love * fc_set_wwnn() - Set the World Wide Node Name of a local port 9153a3b42bfSRobert Love * @lport: The local port whose WWNN is to be set 9163a3b42bfSRobert Love * @wwnn: The new WWNN 9173a3b42bfSRobert Love */ 9183a3b42bfSRobert Love static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn) 91942e9a92fSRobert Love { 9203a3b42bfSRobert Love lport->wwnn = wwnn; 92142e9a92fSRobert Love } 92242e9a92fSRobert Love 9233a3b42bfSRobert Love /** 9243a3b42bfSRobert Love * fc_set_wwpn() - Set the World Wide Port Name of a local port 9253a3b42bfSRobert Love * @lport: The local port whose WWPN is to be set 9263a3b42bfSRobert Love * @wwnn: The new WWPN 9273a3b42bfSRobert Love */ 9283a3b42bfSRobert Love static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn) 92942e9a92fSRobert Love { 9303a3b42bfSRobert Love lport->wwpn = wwnn; 93142e9a92fSRobert Love } 93242e9a92fSRobert Love 9333a3b42bfSRobert Love /** 9343a3b42bfSRobert Love * fc_lport_state_enter() - Change a local port's state 9353a3b42bfSRobert Love * @lport: The local port whose state is to change 9363a3b42bfSRobert Love * @state: The new state 9373a3b42bfSRobert Love */ 9383a3b42bfSRobert Love static inline void fc_lport_state_enter(struct fc_lport *lport, 93942e9a92fSRobert Love enum fc_lport_state state) 94042e9a92fSRobert Love { 9413a3b42bfSRobert Love if (state != lport->state) 9423a3b42bfSRobert Love lport->retry_count = 0; 9433a3b42bfSRobert Love lport->state = state; 94442e9a92fSRobert Love } 94542e9a92fSRobert Love 9463a3b42bfSRobert Love /** 9473a3b42bfSRobert Love * fc_lport_init_stats() - Allocate per-CPU statistics for a local port 9483a3b42bfSRobert Love * @lport: The local port whose statistics are to be initialized 9493a3b42bfSRobert Love */ 9503a3b42bfSRobert Love static inline int fc_lport_init_stats(struct fc_lport *lport) 951582b45bcSRobert Love { 9521bd49b48SVasu Dev lport->stats = alloc_percpu(struct fc_stats); 9531bd49b48SVasu Dev if (!lport->stats) 954582b45bcSRobert Love return -ENOMEM; 955582b45bcSRobert Love return 0; 956582b45bcSRobert Love } 957582b45bcSRobert Love 9583a3b42bfSRobert Love /** 9593a3b42bfSRobert Love * fc_lport_free_stats() - Free memory for a local port's statistics 9603a3b42bfSRobert Love * @lport: The local port whose statistics are to be freed 9613a3b42bfSRobert Love */ 9623a3b42bfSRobert Love static inline void fc_lport_free_stats(struct fc_lport *lport) 963582b45bcSRobert Love { 9641bd49b48SVasu Dev free_percpu(lport->stats); 965a0a25da2SVasu Dev } 966a0a25da2SVasu Dev 967a0a25da2SVasu Dev /** 9683a3b42bfSRobert Love * lport_priv() - Return the private data from a local port 9693a3b42bfSRobert Love * @lport: The local port whose private data is to be retreived 9703a3b42bfSRobert Love */ 9713a3b42bfSRobert Love static inline void *lport_priv(const struct fc_lport *lport) 9723a3b42bfSRobert Love { 9733a3b42bfSRobert Love return (void *)(lport + 1); 9743a3b42bfSRobert Love } 9753a3b42bfSRobert Love 9763a3b42bfSRobert Love /** 9773a3b42bfSRobert Love * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and 9783a3b42bfSRobert Love * LLD private data 9793a3b42bfSRobert Love * @sht: The SCSI host template 9803a3b42bfSRobert Love * @priv_size: Size of private data 981a0a25da2SVasu Dev * 98286221969SChris Leech * Returns: libfc lport 983a0a25da2SVasu Dev */ 98486221969SChris Leech static inline struct fc_lport * 985a0a25da2SVasu Dev libfc_host_alloc(struct scsi_host_template *sht, int priv_size) 986a0a25da2SVasu Dev { 98786221969SChris Leech struct fc_lport *lport; 98886221969SChris Leech struct Scsi_Host *shost; 98986221969SChris Leech 99086221969SChris Leech shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); 99186221969SChris Leech if (!shost) 99286221969SChris Leech return NULL; 99386221969SChris Leech lport = shost_priv(shost); 99486221969SChris Leech lport->host = shost; 99586221969SChris Leech INIT_LIST_HEAD(&lport->ema_list); 996174e1ebfSChris Leech INIT_LIST_HEAD(&lport->vports); 99786221969SChris Leech return lport; 998a0a25da2SVasu Dev } 99942e9a92fSRobert Love 100034f42a07SRobert Love /* 10013a3b42bfSRobert Love * FC_FCP HELPER FUNCTIONS 10023a3b42bfSRobert Love *****************************/ 10033a3b42bfSRobert Love static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) 10043a3b42bfSRobert Love { 10053a3b42bfSRobert Love if (fsp && fsp->cmd) 10063a3b42bfSRobert Love return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; 10073a3b42bfSRobert Love return false; 10083a3b42bfSRobert Love } 10093a3b42bfSRobert Love 10103a3b42bfSRobert Love /* 101142e9a92fSRobert Love * LOCAL PORT LAYER 101242e9a92fSRobert Love *****************************/ 10133a3b42bfSRobert Love int fc_lport_init(struct fc_lport *); 10143a3b42bfSRobert Love int fc_lport_destroy(struct fc_lport *); 10153a3b42bfSRobert Love int fc_fabric_logoff(struct fc_lport *); 10163a3b42bfSRobert Love int fc_fabric_login(struct fc_lport *); 10178faecddbSChris Leech void __fc_linkup(struct fc_lport *); 101842e9a92fSRobert Love void fc_linkup(struct fc_lport *); 10198faecddbSChris Leech void __fc_linkdown(struct fc_lport *); 102042e9a92fSRobert Love void fc_linkdown(struct fc_lport *); 10213a3b42bfSRobert Love void fc_vport_setlink(struct fc_lport *); 10223a3b42bfSRobert Love void fc_vports_linkchange(struct fc_lport *); 102342e9a92fSRobert Love int fc_lport_config(struct fc_lport *); 102442e9a92fSRobert Love int fc_lport_reset(struct fc_lport *); 1025c5cb444cSHannes Reinecke void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp); 10263a3b42bfSRobert Love int fc_set_mfs(struct fc_lport *, u32 mfs); 10273a3b42bfSRobert Love struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize); 10283a3b42bfSRobert Love struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id); 10293a3b42bfSRobert Love int fc_lport_bsg_request(struct fc_bsg_job *); 10303726f358SJoe Eykholt void fc_lport_set_local_id(struct fc_lport *, u32 port_id); 103170d53b04SJoe Eykholt void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *); 1032a51ab396SSteve Ma 1033a51ab396SSteve Ma /* 103442e9a92fSRobert Love * REMOTE PORT LAYER 103542e9a92fSRobert Love *****************************/ 10363a3b42bfSRobert Love int fc_rport_init(struct fc_lport *); 10373a3b42bfSRobert Love void fc_rport_terminate_io(struct fc_rport *); 103842e9a92fSRobert Love 103934f42a07SRobert Love /* 104042e9a92fSRobert Love * DISCOVERY LAYER 104142e9a92fSRobert Love *****************************/ 10420807619dSRobert Love void fc_disc_init(struct fc_lport *); 10430807619dSRobert Love void fc_disc_config(struct fc_lport *, void *); 104442e9a92fSRobert Love 10450685230cSJoe Eykholt static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc) 10460685230cSJoe Eykholt { 10470685230cSJoe Eykholt return container_of(disc, struct fc_lport, disc); 10480685230cSJoe Eykholt } 10490685230cSJoe Eykholt 105034f42a07SRobert Love /* 10513a3b42bfSRobert Love * FCP LAYER 105242e9a92fSRobert Love *****************************/ 105342e9a92fSRobert Love int fc_fcp_init(struct fc_lport *); 105442e9a92fSRobert Love void fc_fcp_destroy(struct fc_lport *); 105542e9a92fSRobert Love 105634f42a07SRobert Love /* 10573a3b42bfSRobert Love * SCSI INTERACTION LAYER 10583a3b42bfSRobert Love *****************************/ 1059f281233dSJeff Garzik int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); 10603a3b42bfSRobert Love int fc_eh_abort(struct scsi_cmnd *); 10613a3b42bfSRobert Love int fc_eh_device_reset(struct scsi_cmnd *); 10623a3b42bfSRobert Love int fc_eh_host_reset(struct scsi_cmnd *); 10633a3b42bfSRobert Love int fc_slave_alloc(struct scsi_device *); 10643a3b42bfSRobert Love 10653a3b42bfSRobert Love /* 106642e9a92fSRobert Love * ELS/CT interface 106742e9a92fSRobert Love *****************************/ 10683a3b42bfSRobert Love int fc_elsct_init(struct fc_lport *); 10693a3b42bfSRobert Love struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did, 10703a3b42bfSRobert Love struct fc_frame *, 107111b56188SChris Leech unsigned int op, 107211b56188SChris Leech void (*resp)(struct fc_seq *, 10733a3b42bfSRobert Love struct fc_frame *, 107411b56188SChris Leech void *arg), 107511b56188SChris Leech void *arg, u32 timer_msec); 107611b56188SChris Leech void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); 107711b56188SChris Leech void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); 107824f089e2SJoe Eykholt void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *, 107924f089e2SJoe Eykholt enum fc_rctl, u32 parm_offset); 108024f089e2SJoe Eykholt void fc_fill_hdr(struct fc_frame *, const struct fc_frame *, 108124f089e2SJoe Eykholt enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset); 108242e9a92fSRobert Love 108342e9a92fSRobert Love 108434f42a07SRobert Love /* 108542e9a92fSRobert Love * EXCHANGE MANAGER LAYER 108642e9a92fSRobert Love *****************************/ 10873a3b42bfSRobert Love int fc_exch_init(struct fc_lport *); 10884e5fae7aSVasu Dev void fc_exch_update_stats(struct fc_lport *lport); 10893afd2d15SHannes Reinecke struct fc_seq *fc_exch_seq_send(struct fc_lport *lport, 10903afd2d15SHannes Reinecke struct fc_frame *fp, 10913afd2d15SHannes Reinecke void (*resp)(struct fc_seq *, 10923afd2d15SHannes Reinecke struct fc_frame *fp, 10933afd2d15SHannes Reinecke void *arg), 10943afd2d15SHannes Reinecke void (*destructor)(struct fc_seq *, void *), 10953afd2d15SHannes Reinecke void *arg, u32 timer_msec); 10967ab24dd1SHannes Reinecke void fc_seq_els_rsp_send(struct fc_frame *, enum fc_els_cmd, 10977ab24dd1SHannes Reinecke struct fc_seq_els_data *); 10983a3b42bfSRobert Love struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *, 10993a3b42bfSRobert Love struct fc_exch_mgr *, 110096316099SVasu Dev bool (*match)(struct fc_frame *)); 11013a3b42bfSRobert Love void fc_exch_mgr_del(struct fc_exch_mgr_anchor *); 1102174e1ebfSChris Leech int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); 11033a3b42bfSRobert Love struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class, 11043a3b42bfSRobert Love u16 min_xid, u16 max_xid, 110552ff878cSVasu Dev bool (*match)(struct fc_frame *)); 11063a3b42bfSRobert Love void fc_exch_mgr_free(struct fc_lport *); 11073a3b42bfSRobert Love void fc_exch_recv(struct fc_lport *, struct fc_frame *); 11081f6ff364SAbhijeet Joglekar void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); 110942e9a92fSRobert Love 111042e9a92fSRobert Love /* 111142e9a92fSRobert Love * Functions for fc_functions_template 111242e9a92fSRobert Love */ 11133a3b42bfSRobert Love void fc_get_host_speed(struct Scsi_Host *); 11143a3b42bfSRobert Love void fc_get_host_port_state(struct Scsi_Host *); 11153a3b42bfSRobert Love void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout); 111642e9a92fSRobert Love struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); 111742e9a92fSRobert Love 111842e9a92fSRobert Love #endif /* _LIBFC_H_ */ 1119