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Diffstat (limited to 'ANDROID_3.4.5/include/scsi/libfc.h')
| -rw-r--r-- | ANDROID_3.4.5/include/scsi/libfc.h | 1139 |
1 files changed, 0 insertions, 1139 deletions
diff --git a/ANDROID_3.4.5/include/scsi/libfc.h b/ANDROID_3.4.5/include/scsi/libfc.h deleted file mode 100644 index 8f9dfba3..00000000 --- a/ANDROID_3.4.5/include/scsi/libfc.h +++ /dev/null @@ -1,1139 +0,0 @@ -/* - * Copyright(c) 2007 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - * Maintained at www.Open-FCoE.org - */ - -#ifndef _LIBFC_H_ -#define _LIBFC_H_ - -#include <linux/timer.h> -#include <linux/if.h> -#include <linux/percpu.h> - -#include <scsi/scsi_transport.h> -#include <scsi/scsi_transport_fc.h> -#include <scsi/scsi_bsg_fc.h> - -#include <scsi/fc/fc_fcp.h> -#include <scsi/fc/fc_ns.h> -#include <scsi/fc/fc_ms.h> -#include <scsi/fc/fc_els.h> -#include <scsi/fc/fc_gs.h> - -#include <scsi/fc_frame.h> - -#define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */ - -/* - * libfc error codes - */ -#define FC_NO_ERR 0 /* no error */ -#define FC_EX_TIMEOUT 1 /* Exchange timeout */ -#define FC_EX_CLOSED 2 /* Exchange closed */ - -/** - * enum fc_lport_state - Local port states - * @LPORT_ST_DISABLED: Disabled - * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent - * @LPORT_ST_DNS: Waiting for name server remote port to become ready - * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent - * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent - * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent - * @LPORT_ST_FDMI: Waiting for mgmt server rport to become ready - * @LPORT_ST_RHBA: - * @LPORT_ST_SCR: State Change Register (SCR) sent - * @LPORT_ST_READY: Ready for use - * @LPORT_ST_LOGO: Local port logout (LOGO) sent - * @LPORT_ST_RESET: Local port reset - */ -enum fc_lport_state { - LPORT_ST_DISABLED = 0, - LPORT_ST_FLOGI, - LPORT_ST_DNS, - LPORT_ST_RNN_ID, - LPORT_ST_RSNN_NN, - LPORT_ST_RSPN_ID, - LPORT_ST_RFT_ID, - LPORT_ST_RFF_ID, - LPORT_ST_FDMI, - LPORT_ST_RHBA, - LPORT_ST_RPA, - LPORT_ST_DHBA, - LPORT_ST_DPRT, - LPORT_ST_SCR, - LPORT_ST_READY, - LPORT_ST_LOGO, - LPORT_ST_RESET -}; - -enum fc_disc_event { - DISC_EV_NONE = 0, - DISC_EV_SUCCESS, - DISC_EV_FAILED -}; - -/** - * enum fc_rport_state - Remote port states - * @RPORT_ST_INIT: Initialized - * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint - * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint - * @RPORT_ST_PLOGI: Waiting for PLOGI completion - * @RPORT_ST_PRLI: Waiting for PRLI completion - * @RPORT_ST_RTV: Waiting for RTV completion - * @RPORT_ST_READY: Ready for use - * @RPORT_ST_ADISC: Discover Address sent - * @RPORT_ST_DELETE: Remote port being deleted -*/ -enum fc_rport_state { - RPORT_ST_INIT, - RPORT_ST_FLOGI, - RPORT_ST_PLOGI_WAIT, - RPORT_ST_PLOGI, - RPORT_ST_PRLI, - RPORT_ST_RTV, - RPORT_ST_READY, - RPORT_ST_ADISC, - RPORT_ST_DELETE, -}; - -/** - * struct fc_disc_port - temporary discovery port to hold rport identifiers - * @lp: Fibre Channel host port instance - * @peers: Node for list management during discovery and RSCN processing - * @rport_work: Work struct for starting the rport state machine - * @port_id: Port ID of the discovered port - */ -struct fc_disc_port { - struct fc_lport *lp; - struct list_head peers; - struct work_struct rport_work; - u32 port_id; -}; - -/** - * enum fc_rport_event - Remote port events - * @RPORT_EV_NONE: No event - * @RPORT_EV_READY: Remote port is ready for use - * @RPORT_EV_FAILED: State machine failed, remote port is not ready - * @RPORT_EV_STOP: Remote port has been stopped - * @RPORT_EV_LOGO: Remote port logout (LOGO) sent - */ -enum fc_rport_event { - RPORT_EV_NONE = 0, - RPORT_EV_READY, - RPORT_EV_FAILED, - RPORT_EV_STOP, - RPORT_EV_LOGO -}; - -struct fc_rport_priv; - -/** - * struct fc_rport_operations - Operations for a remote port - * @event_callback: Function to be called for remote port events - */ -struct fc_rport_operations { - void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, - enum fc_rport_event); -}; - -/** - * struct fc_rport_libfc_priv - libfc internal information about a remote port - * @local_port: The associated local port - * @rp_state: Indicates READY for I/O or DELETE when blocked - * @flags: REC and RETRY supported flags - * @e_d_tov: Error detect timeout value (in msec) - * @r_a_tov: Resource allocation timeout value (in msec) - */ -struct fc_rport_libfc_priv { - struct fc_lport *local_port; - enum fc_rport_state rp_state; - u16 flags; - #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) - #define FC_RP_FLAGS_RETRY (1 << 1) - #define FC_RP_STARTED (1 << 2) - #define FC_RP_FLAGS_CONF_REQ (1 << 3) - unsigned int e_d_tov; - unsigned int r_a_tov; -}; - -/** - * struct fc_rport_priv - libfc remote port and discovery info - * @local_port: The associated local port - * @rport: The FC transport remote port - * @kref: Reference counter - * @rp_state: Enumeration that tracks progress of PLOGI, PRLI, - * and RTV exchanges - * @ids: The remote port identifiers and roles - * @flags: STARTED, REC and RETRY_SUPPORTED flags - * @max_seq: Maximum number of concurrent sequences - * @disc_id: The discovery identifier - * @maxframe_size: The maximum frame size - * @retries: The retry count for the current state - * @major_retries: The retry count for the entire PLOGI/PRLI state machine - * @e_d_tov: Error detect timeout value (in msec) - * @r_a_tov: Resource allocation timeout value (in msec) - * @rp_mutex: The mutex that protects the remote port - * @retry_work: Handle for retries - * @event_callback: Callback when READY, FAILED or LOGO states complete - * @prli_count: Count of open PRLI sessions in providers - * @rcu: Structure used for freeing in an RCU-safe manner - */ -struct fc_rport_priv { - struct fc_lport *local_port; - struct fc_rport *rport; - struct kref kref; - enum fc_rport_state rp_state; - struct fc_rport_identifiers ids; - u16 flags; - u16 max_seq; - u16 disc_id; - u16 maxframe_size; - unsigned int retries; - unsigned int major_retries; - unsigned int e_d_tov; - unsigned int r_a_tov; - struct mutex rp_mutex; - struct delayed_work retry_work; - enum fc_rport_event event; - struct fc_rport_operations *ops; - struct list_head peers; - struct work_struct event_work; - u32 supported_classes; - u16 prli_count; - struct rcu_head rcu; - u16 sp_features; - u8 spp_type; - void (*lld_event_callback)(struct fc_lport *, - struct fc_rport_priv *, - enum fc_rport_event); -}; - -/** - * struct fcoe_dev_stats - fcoe stats structure - * @SecondsSinceLastReset: Seconds since the last reset - * @TxFrames: Number of transmitted frames - * @TxWords: Number of transmitted words - * @RxFrames: Number of received frames - * @RxWords: Number of received words - * @ErrorFrames: Number of received error frames - * @DumpedFrames: Number of dumped frames - * @LinkFailureCount: Number of link failures - * @LossOfSignalCount: Number for signal losses - * @InvalidTxWordCount: Number of invalid transmitted words - * @InvalidCRCCount: Number of invalid CRCs - * @InputRequests: Number of input requests - * @OutputRequests: Number of output requests - * @ControlRequests: Number of control requests - * @InputBytes: Number of received bytes - * @OutputBytes: Number of transmitted bytes - * @VLinkFailureCount: Number of virtual link failures - * @MissDiscAdvCount: Number of missing FIP discovery advertisement - */ -struct fcoe_dev_stats { - u64 SecondsSinceLastReset; - u64 TxFrames; - u64 TxWords; - u64 RxFrames; - u64 RxWords; - u64 ErrorFrames; - u64 DumpedFrames; - u64 LinkFailureCount; - u64 LossOfSignalCount; - u64 InvalidTxWordCount; - u64 InvalidCRCCount; - u64 InputRequests; - u64 OutputRequests; - u64 ControlRequests; - u64 InputBytes; - u64 OutputBytes; - u64 VLinkFailureCount; - u64 MissDiscAdvCount; -}; - -/** - * struct fc_seq_els_data - ELS data used for passing ELS specific responses - * @reason: The reason for rejection - * @explan: The explanation of the rejection - * - * Mainly used by the exchange manager layer. - */ -struct fc_seq_els_data { - enum fc_els_rjt_reason reason; - enum fc_els_rjt_explan explan; -}; - -/** - * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request) - * @lp: The associated local port - * @state: The state of the I/O - * @ref_cnt: Reference count - * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the - * host_lock if both are to be held at the same time) - * @cmd: The SCSI command (set and clear with the host_lock held) - * @list: Tracks queued commands (accessed with the host_lock held) - * @timer: The command timer - * @tm_done: Completion indicator - * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies) - * @data_len: The length of the data - * @cdb_cmd: The CDB command - * @xfer_len: The transfer length - * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange - * will be set here if DDP was setup) - * @xfer_contig_end: The offset into the buffer if the buffer is contiguous - * (Tx and Rx) - * @max_payload: The maximum payload size (in bytes) - * @io_status: SCSI result (upper 24 bits) - * @cdb_status: CDB status - * @status_code: FCP I/O status - * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun) - * @req_flags: Request flags (bit 0: read bit:1 write) - * @scsi_resid: SCSI residule length - * @rport: The remote port that the SCSI command is targeted at - * @seq_ptr: The sequence that will carry the SCSI command - * @recov_retry: Number of recovery retries - * @recov_seq: The sequence for REC or SRR - */ -struct fc_fcp_pkt { - spinlock_t scsi_pkt_lock; - atomic_t ref_cnt; - - /* SCSI command and data transfer information */ - u32 data_len; - - /* SCSI I/O related information */ - struct scsi_cmnd *cmd; - struct list_head list; - - /* Housekeeping information */ - struct fc_lport *lp; - u8 state; - - /* SCSI/FCP return status */ - u8 cdb_status; - u8 status_code; - u8 scsi_comp_flags; - u32 io_status; - u32 req_flags; - u32 scsi_resid; - - /* Transport related veriables */ - size_t xfer_len; - struct fcp_cmnd cdb_cmd; - u32 xfer_contig_end; - u16 max_payload; - u16 xfer_ddp; - - /* Associated structures */ - struct fc_rport *rport; - struct fc_seq *seq_ptr; - - /* Timeout/error related information */ - struct timer_list timer; - int wait_for_comp; - u32 recov_retry; - struct fc_seq *recov_seq; - struct completion tm_done; -} ____cacheline_aligned_in_smp; - -/* - * Structure and function definitions for managing Fibre Channel Exchanges - * and Sequences - * - * fc_exch holds state for one exchange and links to its active sequence. - * - * fc_seq holds the state for an individual sequence. - */ - -struct fc_exch_mgr; -struct fc_exch_mgr_anchor; -extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ - -/** - * struct fc_seq - FC sequence - * @id: The sequence ID - * @ssb_stat: Status flags for the sequence status block (SSB) - * @cnt: Number of frames sent so far - * @rec_data: FC-4 value for REC - */ -struct fc_seq { - u8 id; - u16 ssb_stat; - u16 cnt; - u32 rec_data; -}; - -#define FC_EX_DONE (1 << 0) /* ep is completed */ -#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ - -/** - * struct fc_exch - Fibre Channel Exchange - * @em: Exchange manager - * @pool: Exchange pool - * @state: The exchange's state - * @xid: The exchange ID - * @ex_list: Handle used by the EM to track free exchanges - * @ex_lock: Lock that protects the exchange - * @ex_refcnt: Reference count - * @timeout_work: Handle for timeout handler - * @lp: The local port that this exchange is on - * @oxid: Originator's exchange ID - * @rxid: Responder's exchange ID - * @oid: Originator's FCID - * @sid: Source FCID - * @did: Destination FCID - * @esb_stat: ESB exchange status - * @r_a_tov: Resouce allocation time out value (in msecs) - * @seq_id: The next sequence ID to use - * @encaps: encapsulation information for lower-level driver - * @f_ctl: F_CTL flags for the sequence - * @fh_type: The frame type - * @class: The class of service - * @seq: The sequence in use on this exchange - * @resp: Callback for responses on this exchange - * @destructor: Called when destroying the exchange - * @arg: Passed as a void pointer to the resp() callback - * - * Locking notes: The ex_lock protects following items: - * state, esb_stat, f_ctl, seq.ssb_stat - * seq_id - * sequence allocation - */ -struct fc_exch { - spinlock_t ex_lock; - atomic_t ex_refcnt; - enum fc_class class; - struct fc_exch_mgr *em; - struct fc_exch_pool *pool; - struct list_head ex_list; - struct fc_lport *lp; - u32 esb_stat; - u8 state; - u8 fh_type; - u8 seq_id; - u8 encaps; - u16 xid; - u16 oxid; - u16 rxid; - u32 oid; - u32 sid; - u32 did; - u32 r_a_tov; - u32 f_ctl; - struct fc_seq seq; - void (*resp)(struct fc_seq *, struct fc_frame *, void *); - void *arg; - void (*destructor)(struct fc_seq *, void *); - struct delayed_work timeout_work; -} ____cacheline_aligned_in_smp; -#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) - - -struct libfc_function_template { - /* - * Interface to send a FC frame - * - * STATUS: REQUIRED - */ - int (*frame_send)(struct fc_lport *, struct fc_frame *); - - /* - * Interface to send ELS/CT frames - * - * STATUS: OPTIONAL - */ - struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did, - struct fc_frame *, unsigned int op, - void (*resp)(struct fc_seq *, - struct fc_frame *, void *arg), - void *arg, u32 timer_msec); - - /* - * Send the FC frame payload using a new exchange and sequence. - * - * The exchange response handler is set in this routine to resp() - * function pointer. It can be called in two scenarios: if a timeout - * occurs or if a response frame is received for the exchange. The - * fc_frame pointer in response handler will also indicate timeout - * as error using IS_ERR related macros. - * - * The exchange destructor handler is also set in this routine. - * The destructor handler is invoked by EM layer when exchange - * is about to free, this can be used by caller to free its - * resources along with exchange free. - * - * The arg is passed back to resp and destructor handler. - * - * The timeout value (in msec) for an exchange is set if non zero - * timer_msec argument is specified. The timer is canceled when - * it fires or when the exchange is done. The exchange timeout handler - * is registered by EM layer. - * - * STATUS: OPTIONAL - */ - struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *, - void (*resp)(struct fc_seq *, - struct fc_frame *, - void *), - void (*destructor)(struct fc_seq *, - void *), - void *, unsigned int timer_msec); - - /* - * Sets up the DDP context for a given exchange id on the given - * scatterlist if LLD supports DDP for large receive. - * - * STATUS: OPTIONAL - */ - int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *, - unsigned int); - /* - * Completes the DDP transfer and returns the length of data DDPed - * for the given exchange id. - * - * STATUS: OPTIONAL - */ - int (*ddp_done)(struct fc_lport *, u16); - /* - * Sets up the DDP context for a given exchange id on the given - * scatterlist if LLD supports DDP for FCoE target. - * - * STATUS: OPTIONAL - */ - int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *, - unsigned int); - /* - * Allow LLD to fill its own Link Error Status Block - * - * STATUS: OPTIONAL - */ - void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb); - /* - * Send a frame using an existing sequence and exchange. - * - * STATUS: OPTIONAL - */ - int (*seq_send)(struct fc_lport *, struct fc_seq *, - struct fc_frame *); - - /* - * Send an ELS response using information from the received frame. - * - * STATUS: OPTIONAL - */ - void (*seq_els_rsp_send)(struct fc_frame *, enum fc_els_cmd, - struct fc_seq_els_data *); - - /* - * Abort an exchange and sequence. Generally called because of a - * exchange timeout or an abort from the upper layer. - * - * A timer_msec can be specified for abort timeout, if non-zero - * timer_msec value is specified then exchange resp handler - * will be called with timeout error if no response to abort. - * - * STATUS: OPTIONAL - */ - int (*seq_exch_abort)(const struct fc_seq *, - unsigned int timer_msec); - - /* - * Indicate that an exchange/sequence tuple is complete and the memory - * allocated for the related objects may be freed. - * - * STATUS: OPTIONAL - */ - void (*exch_done)(struct fc_seq *); - - /* - * Start a new sequence on the same exchange/sequence tuple. - * - * STATUS: OPTIONAL - */ - struct fc_seq *(*seq_start_next)(struct fc_seq *); - - /* - * Set a response handler for the exchange of the sequence. - * - * STATUS: OPTIONAL - */ - void (*seq_set_resp)(struct fc_seq *sp, - void (*resp)(struct fc_seq *, struct fc_frame *, - void *), - void *arg); - - /* - * Assign a sequence for an incoming request frame. - * - * STATUS: OPTIONAL - */ - struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *); - - /* - * Release the reference on the sequence returned by seq_assign(). - * - * STATUS: OPTIONAL - */ - void (*seq_release)(struct fc_seq *); - - /* - * Reset an exchange manager, completing all sequences and exchanges. - * If s_id is non-zero, reset only exchanges originating from that FID. - * If d_id is non-zero, reset only exchanges sending to that FID. - * - * STATUS: OPTIONAL - */ - void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id); - - /* - * Flush the rport work queue. Generally used before shutdown. - * - * STATUS: OPTIONAL - */ - void (*rport_flush_queue)(void); - - /* - * Receive a frame for a local port. - * - * STATUS: OPTIONAL - */ - void (*lport_recv)(struct fc_lport *, struct fc_frame *); - - /* - * Reset the local port. - * - * STATUS: OPTIONAL - */ - int (*lport_reset)(struct fc_lport *); - - /* - * Set the local port FC_ID. - * - * This may be provided by the LLD to allow it to be - * notified when the local port is assigned a FC-ID. - * - * The frame, if non-NULL, is the incoming frame with the - * FLOGI LS_ACC or FLOGI, and may contain the granted MAC - * address for the LLD. The frame pointer may be NULL if - * no MAC is associated with this assignment (LOGO or PLOGI). - * - * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid. - * - * Note: this is called with the local port mutex held. - * - * STATUS: OPTIONAL - */ - void (*lport_set_port_id)(struct fc_lport *, u32 port_id, - struct fc_frame *); - - /* - * Create a remote port with a given port ID - * - * STATUS: OPTIONAL - */ - struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); - - /* - * Initiates the RP state machine. It is called from the LP module. - * This function will issue the following commands to the N_Port - * identified by the FC ID provided. - * - * - PLOGI - * - PRLI - * - RTV - * - * STATUS: OPTIONAL - */ - int (*rport_login)(struct fc_rport_priv *); - - /* - * Logoff, and remove the rport from the transport if - * it had been added. This will send a LOGO to the target. - * - * STATUS: OPTIONAL - */ - int (*rport_logoff)(struct fc_rport_priv *); - - /* - * Receive a request from a remote port. - * - * STATUS: OPTIONAL - */ - void (*rport_recv_req)(struct fc_lport *, struct fc_frame *); - - /* - * lookup an rport by it's port ID. - * - * STATUS: OPTIONAL - */ - struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); - - /* - * Destroy an rport after final kref_put(). - * The argument is a pointer to the kref inside the fc_rport_priv. - */ - void (*rport_destroy)(struct kref *); - - /* - * Callback routine after the remote port is logged in - * - * STATUS: OPTIONAL - */ - void (*rport_event_callback)(struct fc_lport *, - struct fc_rport_priv *, - enum fc_rport_event); - - /* - * Send a fcp cmd from fsp pkt. - * Called with the SCSI host lock unlocked and irqs disabled. - * - * The resp handler is called when FCP_RSP received. - * - * STATUS: OPTIONAL - */ - int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *, - void (*resp)(struct fc_seq *, struct fc_frame *, - void *)); - - /* - * Cleanup the FCP layer, used during link down and reset - * - * STATUS: OPTIONAL - */ - void (*fcp_cleanup)(struct fc_lport *); - - /* - * Abort all I/O on a local port - * - * STATUS: OPTIONAL - */ - void (*fcp_abort_io)(struct fc_lport *); - - /* - * Receive a request for the discovery layer. - * - * STATUS: OPTIONAL - */ - void (*disc_recv_req)(struct fc_lport *, struct fc_frame *); - - /* - * Start discovery for a local port. - * - * STATUS: OPTIONAL - */ - void (*disc_start)(void (*disc_callback)(struct fc_lport *, - enum fc_disc_event), - struct fc_lport *); - - /* - * Stop discovery for a given lport. This will remove - * all discovered rports - * - * STATUS: OPTIONAL - */ - void (*disc_stop) (struct fc_lport *); - - /* - * Stop discovery for a given lport. This will block - * until all discovered rports are deleted from the - * FC transport class - * - * STATUS: OPTIONAL - */ - void (*disc_stop_final) (struct fc_lport *); -}; - -/** - * struct fc_disc - Discovery context - * @retry_count: Number of retries - * @pending: 1 if discovery is pending, 0 if not - * @requested: 1 if discovery has been requested, 0 if not - * @seq_count: Number of sequences used for discovery - * @buf_len: Length of the discovery buffer - * @disc_id: Discovery ID - * @rports: List of discovered remote ports - * @priv: Private pointer for use by discovery code - * @disc_mutex: Mutex that protects the discovery context - * @partial_buf: Partial name buffer (if names are returned - * in multiple frames) - * @disc_work: handle for delayed work context - * @disc_callback: Callback routine called when discovery completes - */ -struct fc_disc { - unsigned char retry_count; - unsigned char pending; - unsigned char requested; - unsigned short seq_count; - unsigned char buf_len; - u16 disc_id; - - struct list_head rports; - void *priv; - struct mutex disc_mutex; - struct fc_gpn_ft_resp partial_buf; - struct delayed_work disc_work; - - void (*disc_callback)(struct fc_lport *, - enum fc_disc_event); -}; - -/* - * Local port notifier and events. - */ -extern struct blocking_notifier_head fc_lport_notifier_head; -enum fc_lport_event { - FC_LPORT_EV_ADD, - FC_LPORT_EV_DEL, -}; - -/** - * struct fc_lport - Local port - * @host: The SCSI host associated with a local port - * @ema_list: Exchange manager anchor list - * @dns_rdata: The directory server remote port - * @ms_rdata: The management server remote port - * @ptp_rdata: Point to point remote port - * @scsi_priv: FCP layer internal data - * @disc: Discovery context - * @vports: Child vports if N_Port - * @vport: Parent vport if VN_Port - * @tt: Libfc function template - * @link_up: Link state (1 = link up, 0 = link down) - * @qfull: Queue state (1 queue is full, 0 queue is not full) - * @state: Identifies the state - * @boot_time: Timestamp indicating when the local port came online - * @host_stats: SCSI host statistics - * @dev_stats: FCoE device stats (TODO: libfc should not be - * FCoE aware) - * @retry_count: Number of retries in the current state - * @port_id: FC Port ID - * @wwpn: World Wide Port Name - * @wwnn: World Wide Node Name - * @service_params: Common service parameters - * @e_d_tov: Error detection timeout value - * @r_a_tov: Resouce allocation timeout value - * @rnid_gen: RNID information - * @sg_supp: Indicates if scatter gather is supported - * @seq_offload: Indicates if sequence offload is supported - * @crc_offload: Indicates if CRC offload is supported - * @lro_enabled: Indicates if large receive offload is supported - * @does_npiv: Supports multiple vports - * @npiv_enabled: Switch/fabric allows NPIV - * @mfs: The maximum Fibre Channel payload size - * @max_retry_count: The maximum retry attempts - * @max_rport_retry_count: The maximum remote port retry attempts - * @rport_priv_size: Size needed by driver after struct fc_rport_priv - * @lro_xid: The maximum XID for LRO - * @lso_max: The maximum large offload send size - * @fcts: FC-4 type mask - * @lp_mutex: Mutex to protect the local port - * @list: Linkage on list of vport peers - * @retry_work: Handle to local port for delayed retry context - * @prov: Pointers available for use by passive FC-4 providers - * @lport_list: Linkage on module-wide list of local ports - */ -struct fc_lport { - /* Associations */ - struct Scsi_Host *host; - struct list_head ema_list; - struct fc_rport_priv *dns_rdata; - struct fc_rport_priv *ms_rdata; - struct fc_rport_priv *ptp_rdata; - void *scsi_priv; - struct fc_disc disc; - - /* Virtual port information */ - struct list_head vports; - struct fc_vport *vport; - - /* Operational Information */ - struct libfc_function_template tt; - u8 link_up; - u8 qfull; - enum fc_lport_state state; - unsigned long boot_time; - struct fc_host_statistics host_stats; - struct fcoe_dev_stats __percpu *dev_stats; - u8 retry_count; - - /* Fabric information */ - u32 port_id; - u64 wwpn; - u64 wwnn; - unsigned int service_params; - unsigned int e_d_tov; - unsigned int r_a_tov; - struct fc_els_rnid_gen rnid_gen; - - /* Capabilities */ - u32 sg_supp:1; - u32 seq_offload:1; - u32 crc_offload:1; - u32 lro_enabled:1; - u32 does_npiv:1; - u32 npiv_enabled:1; - u32 point_to_multipoint:1; - u32 fdmi_enabled:1; - u32 mfs; - u8 max_retry_count; - u8 max_rport_retry_count; - u16 rport_priv_size; - u16 link_speed; - u16 link_supported_speeds; - u16 lro_xid; - unsigned int lso_max; - struct fc_ns_fts fcts; - - /* Miscellaneous */ - struct mutex lp_mutex; - struct list_head list; - struct delayed_work retry_work; - void *prov[FC_FC4_PROV_SIZE]; - struct list_head lport_list; -}; - -/** - * struct fc4_prov - FC-4 provider registration - * @prli: Handler for incoming PRLI - * @prlo: Handler for session reset - * @recv: Handler for incoming request - * @module: Pointer to module. May be NULL. - */ -struct fc4_prov { - int (*prli)(struct fc_rport_priv *, u32 spp_len, - const struct fc_els_spp *spp_in, - struct fc_els_spp *spp_out); - void (*prlo)(struct fc_rport_priv *); - void (*recv)(struct fc_lport *, struct fc_frame *); - struct module *module; -}; - -/* - * Register FC-4 provider with libfc. - */ -int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *); -void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *); - -/* - * FC_LPORT HELPER FUNCTIONS - *****************************/ - -/** - * fc_lport_test_ready() - Determine if a local port is in the READY state - * @lport: The local port to test - */ -static inline int fc_lport_test_ready(struct fc_lport *lport) -{ - return lport->state == LPORT_ST_READY; -} - -/** - * fc_set_wwnn() - Set the World Wide Node Name of a local port - * @lport: The local port whose WWNN is to be set - * @wwnn: The new WWNN - */ -static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn) -{ - lport->wwnn = wwnn; -} - -/** - * fc_set_wwpn() - Set the World Wide Port Name of a local port - * @lport: The local port whose WWPN is to be set - * @wwnn: The new WWPN - */ -static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn) -{ - lport->wwpn = wwnn; -} - -/** - * fc_lport_state_enter() - Change a local port's state - * @lport: The local port whose state is to change - * @state: The new state - */ -static inline void fc_lport_state_enter(struct fc_lport *lport, - enum fc_lport_state state) -{ - if (state != lport->state) - lport->retry_count = 0; - lport->state = state; -} - -/** - * fc_lport_init_stats() - Allocate per-CPU statistics for a local port - * @lport: The local port whose statistics are to be initialized - */ -static inline int fc_lport_init_stats(struct fc_lport *lport) -{ - lport->dev_stats = alloc_percpu(struct fcoe_dev_stats); - if (!lport->dev_stats) - return -ENOMEM; - return 0; -} - -/** - * fc_lport_free_stats() - Free memory for a local port's statistics - * @lport: The local port whose statistics are to be freed - */ -static inline void fc_lport_free_stats(struct fc_lport *lport) -{ - free_percpu(lport->dev_stats); -} - -/** - * lport_priv() - Return the private data from a local port - * @lport: The local port whose private data is to be retreived - */ -static inline void *lport_priv(const struct fc_lport *lport) -{ - return (void *)(lport + 1); -} - -/** - * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and - * LLD private data - * @sht: The SCSI host template - * @priv_size: Size of private data - * - * Returns: libfc lport - */ -static inline struct fc_lport * -libfc_host_alloc(struct scsi_host_template *sht, int priv_size) -{ - struct fc_lport *lport; - struct Scsi_Host *shost; - - shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); - if (!shost) - return NULL; - lport = shost_priv(shost); - lport->host = shost; - INIT_LIST_HEAD(&lport->ema_list); - INIT_LIST_HEAD(&lport->vports); - return lport; -} - -/* - * FC_FCP HELPER FUNCTIONS - *****************************/ -static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) -{ - if (fsp && fsp->cmd) - return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; - return false; -} - -/* - * LOCAL PORT LAYER - *****************************/ -int fc_lport_init(struct fc_lport *); -int fc_lport_destroy(struct fc_lport *); -int fc_fabric_logoff(struct fc_lport *); -int fc_fabric_login(struct fc_lport *); -void __fc_linkup(struct fc_lport *); -void fc_linkup(struct fc_lport *); -void __fc_linkdown(struct fc_lport *); -void fc_linkdown(struct fc_lport *); -void fc_vport_setlink(struct fc_lport *); -void fc_vports_linkchange(struct fc_lport *); -int fc_lport_config(struct fc_lport *); -int fc_lport_reset(struct fc_lport *); -int fc_set_mfs(struct fc_lport *, u32 mfs); -struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize); -struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id); -int fc_lport_bsg_request(struct fc_bsg_job *); -void fc_lport_set_local_id(struct fc_lport *, u32 port_id); -void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *); - -/* - * REMOTE PORT LAYER - *****************************/ -int fc_rport_init(struct fc_lport *); -void fc_rport_terminate_io(struct fc_rport *); - -/* - * DISCOVERY LAYER - *****************************/ -int fc_disc_init(struct fc_lport *); - -static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc) -{ - return container_of(disc, struct fc_lport, disc); -} - -/* - * FCP LAYER - *****************************/ -int fc_fcp_init(struct fc_lport *); -void fc_fcp_destroy(struct fc_lport *); - -/* - * SCSI INTERACTION LAYER - *****************************/ -int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); -int fc_eh_abort(struct scsi_cmnd *); -int fc_eh_device_reset(struct scsi_cmnd *); -int fc_eh_host_reset(struct scsi_cmnd *); -int fc_slave_alloc(struct scsi_device *); -int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason); -int fc_change_queue_type(struct scsi_device *, int tag_type); - -/* - * ELS/CT interface - *****************************/ -int fc_elsct_init(struct fc_lport *); -struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did, - struct fc_frame *, - unsigned int op, - void (*resp)(struct fc_seq *, - struct fc_frame *, - void *arg), - void *arg, u32 timer_msec); -void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); -void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); -void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *, - enum fc_rctl, u32 parm_offset); -void fc_fill_hdr(struct fc_frame *, const struct fc_frame *, - enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset); - - -/* - * EXCHANGE MANAGER LAYER - *****************************/ -int fc_exch_init(struct fc_lport *); -struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *, - struct fc_exch_mgr *, - bool (*match)(struct fc_frame *)); -void fc_exch_mgr_del(struct fc_exch_mgr_anchor *); -int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); -struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class, - u16 min_xid, u16 max_xid, - bool (*match)(struct fc_frame *)); -void fc_exch_mgr_free(struct fc_lport *); -void fc_exch_recv(struct fc_lport *, struct fc_frame *); -void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); - -/* - * Functions for fc_functions_template - */ -void fc_get_host_speed(struct Scsi_Host *); -void fc_get_host_port_state(struct Scsi_Host *); -void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout); -struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); - -#endif /* _LIBFC_H_ */ |