624 lines
16 KiB
C
624 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*/
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#ifndef __EFCLIB_H__
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#define __EFCLIB_H__
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#include "scsi/fc/fc_els.h"
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#include "scsi/fc/fc_fs.h"
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#include "scsi/fc/fc_ns.h"
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#include "scsi/fc/fc_gs.h"
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#include "scsi/fc_frame.h"
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#include "../include/efc_common.h"
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#include "../libefc_sli/sli4.h"
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#define EFC_SERVICE_PARMS_LENGTH 120
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#define EFC_NAME_LENGTH 32
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#define EFC_SM_NAME_LENGTH 64
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#define EFC_DISPLAY_BUS_INFO_LENGTH 16
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#define EFC_WWN_LENGTH 32
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#define EFC_FC_ELS_DEFAULT_RETRIES 3
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/* Timeouts */
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#define EFC_FC_ELS_SEND_DEFAULT_TIMEOUT 0
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#define EFC_FC_FLOGI_TIMEOUT_SEC 5
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#define EFC_SHUTDOWN_TIMEOUT_USEC 30000000
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/* Return values for calls from base driver to libefc */
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#define EFC_SCSI_CALL_COMPLETE 0
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#define EFC_SCSI_CALL_ASYNC 1
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/* Local port topology */
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enum efc_nport_topology {
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EFC_NPORT_TOPO_UNKNOWN = 0,
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EFC_NPORT_TOPO_FABRIC,
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EFC_NPORT_TOPO_P2P,
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EFC_NPORT_TOPO_FC_AL,
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};
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#define enable_target_rscn(efc) 1
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enum efc_node_shutd_rsn {
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EFC_NODE_SHUTDOWN_DEFAULT = 0,
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EFC_NODE_SHUTDOWN_EXPLICIT_LOGO,
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EFC_NODE_SHUTDOWN_IMPLICIT_LOGO,
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};
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enum efc_node_send_ls_acc {
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EFC_NODE_SEND_LS_ACC_NONE = 0,
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EFC_NODE_SEND_LS_ACC_PLOGI,
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EFC_NODE_SEND_LS_ACC_PRLI,
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};
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#define EFC_LINK_STATUS_UP 0
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#define EFC_LINK_STATUS_DOWN 1
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enum efc_sm_event;
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/* State machine context header */
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struct efc_sm_ctx {
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void (*current_state)(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg);
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const char *description;
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void *app;
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};
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/* Description of discovered Fabric Domain */
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struct efc_domain_record {
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u32 index;
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u32 priority;
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u8 address[6];
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u8 wwn[8];
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union {
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u8 vlan[512];
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u8 loop[128];
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} map;
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u32 speed;
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u32 fc_id;
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bool is_loop;
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bool is_nport;
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};
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/* Domain events */
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enum efc_hw_domain_event {
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EFC_HW_DOMAIN_ALLOC_OK,
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EFC_HW_DOMAIN_ALLOC_FAIL,
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EFC_HW_DOMAIN_ATTACH_OK,
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EFC_HW_DOMAIN_ATTACH_FAIL,
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EFC_HW_DOMAIN_FREE_OK,
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EFC_HW_DOMAIN_FREE_FAIL,
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EFC_HW_DOMAIN_LOST,
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EFC_HW_DOMAIN_FOUND,
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EFC_HW_DOMAIN_CHANGED,
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};
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/**
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* Fibre Channel port object
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*
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* @list_entry: nport list entry
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* @ref: reference count, each node takes a reference
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* @release: function to free nport object
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* @efc: pointer back to efc
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* @instance_index: unique instance index value
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* @display_name: port display name
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* @is_vport: Is NPIV port
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* @free_req_pending: pending request to free resources
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* @attached: mark attached if reg VPI succeeds
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* @p2p_winner: TRUE if we're the point-to-point winner
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* @domain: pointer back to domain
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* @wwpn: port wwpn
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* @wwnn: port wwnn
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* @tgt_data: target backend private port data
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* @ini_data: initiator backend private port data
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* @indicator: VPI
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* @fc_id: port FC address
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* @dma: memory for Service Parameters
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* @wwnn_str: wwpn string
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* @sli_wwpn: SLI provided wwpn
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* @sli_wwnn: SLI provided wwnn
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* @sm: nport state machine context
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* @lookup: fc_id to node lookup object
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* @enable_ini: SCSI initiator enabled for this port
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* @enable_tgt: SCSI target enabled for this port
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* @enable_rscn: port will be expecting RSCN
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* @shutting_down: nport in process of shutting down
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* @p2p_port_id: our port id for point-to-point
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* @topology: topology: fabric/p2p/unknown
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* @service_params: login parameters
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* @p2p_remote_port_id: remote node's port id for point-to-point
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*/
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struct efc_nport {
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struct list_head list_entry;
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struct kref ref;
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void (*release)(struct kref *arg);
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struct efc *efc;
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u32 instance_index;
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char display_name[EFC_NAME_LENGTH];
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bool is_vport;
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bool free_req_pending;
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bool attached;
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bool attaching;
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bool p2p_winner;
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struct efc_domain *domain;
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u64 wwpn;
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u64 wwnn;
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void *tgt_data;
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void *ini_data;
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u32 indicator;
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u32 fc_id;
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struct efc_dma dma;
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u8 wwnn_str[EFC_WWN_LENGTH];
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__be64 sli_wwpn;
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__be64 sli_wwnn;
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struct efc_sm_ctx sm;
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struct xarray lookup;
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bool enable_ini;
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bool enable_tgt;
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bool enable_rscn;
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bool shutting_down;
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u32 p2p_port_id;
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enum efc_nport_topology topology;
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u8 service_params[EFC_SERVICE_PARMS_LENGTH];
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u32 p2p_remote_port_id;
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};
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/**
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* Fibre Channel domain object
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*
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* This object is a container for the various SLI components needed
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* to connect to the domain of a FC or FCoE switch
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* @efc: pointer back to efc
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* @instance_index: unique instance index value
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* @display_name: Node display name
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* @nport_list: linked list of nports associated with this domain
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* @ref: Reference count, each nport takes a reference
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* @release: Function to free domain object
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* @ini_domain: initiator backend private domain data
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* @tgt_domain: target backend private domain data
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* @sm: state machine context
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* @fcf: FC Forwarder table index
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* @fcf_indicator: FCFI
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* @indicator: VFI
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* @nport_count: Number of nports allocated
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* @dma: memory for Service Parameters
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* @fcf_wwn: WWN for FCF/switch
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* @drvsm: driver domain sm context
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* @attached: set true after attach completes
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* @is_fc: is FC
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* @is_loop: is loop topology
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* @is_nlport: is public loop
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* @domain_found_pending:A domain found is pending, drec is updated
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* @req_domain_free: True if domain object should be free'd
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* @req_accept_frames: set in domain state machine to enable frames
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* @domain_notify_pend: Set in domain SM to avoid duplicate node event post
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* @pending_drec: Pending drec if a domain found is pending
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* @service_params: any nports service parameters
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* @flogi_service_params:Fabric/P2p service parameters from FLOGI
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* @lookup: d_id to node lookup object
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* @nport: Pointer to first (physical) SLI port
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*/
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struct efc_domain {
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struct efc *efc;
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char display_name[EFC_NAME_LENGTH];
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struct list_head nport_list;
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struct kref ref;
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void (*release)(struct kref *arg);
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void *ini_domain;
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void *tgt_domain;
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/* Declarations private to HW/SLI */
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u32 fcf;
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u32 fcf_indicator;
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u32 indicator;
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u32 nport_count;
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struct efc_dma dma;
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/* Declarations private to FC trannport */
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u64 fcf_wwn;
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struct efc_sm_ctx drvsm;
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bool attached;
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bool is_fc;
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bool is_loop;
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bool is_nlport;
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bool domain_found_pending;
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bool req_domain_free;
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bool req_accept_frames;
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bool domain_notify_pend;
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struct efc_domain_record pending_drec;
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u8 service_params[EFC_SERVICE_PARMS_LENGTH];
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u8 flogi_service_params[EFC_SERVICE_PARMS_LENGTH];
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struct xarray lookup;
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struct efc_nport *nport;
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};
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/**
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* Remote Node object
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*
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* This object represents a connection between the SLI port and another
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* Nx_Port on the fabric. Note this can be either a well known port such
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* as a F_Port (i.e. ff:ff:fe) or another N_Port.
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* @indicator: RPI
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* @fc_id: FC address
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* @attached: true if attached
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* @nport: associated SLI port
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* @node: associated node
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*/
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struct efc_remote_node {
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u32 indicator;
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u32 index;
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u32 fc_id;
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bool attached;
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struct efc_nport *nport;
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void *node;
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};
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/**
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* FC Node object
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* @efc: pointer back to efc structure
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* @display_name: Node display name
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* @nort: Assosiated nport pointer.
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* @hold_frames: hold incoming frames if true
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* @els_io_enabled: Enable allocating els ios for this node
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* @els_ios_lock: lock to protect the els ios list
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* @els_ios_list: ELS I/O's for this node
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* @ini_node: backend initiator private node data
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* @tgt_node: backend target private node data
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* @rnode: Remote node
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* @sm: state machine context
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* @evtdepth: current event posting nesting depth
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* @req_free: this node is to be free'd
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* @attached: node is attached (REGLOGIN complete)
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* @fcp_enabled: node is enabled to handle FCP
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* @rscn_pending: for name server node RSCN is pending
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* @send_plogi: send PLOGI accept, upon completion of node attach
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* @send_plogi_acc: TRUE if io_alloc() is enabled.
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* @send_ls_acc: type of LS acc to send
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* @ls_acc_io: SCSI IO for LS acc
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* @ls_acc_oxid: OX_ID for pending accept
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* @ls_acc_did: D_ID for pending accept
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* @shutdown_reason: reason for node shutdown
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* @sparm_dma_buf: service parameters buffer
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* @service_params: plogi/acc frame from remote device
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* @pend_frames_lock: lock for inbound pending frames list
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* @pend_frames: inbound pending frames list
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* @pend_frames_processed:count of frames processed in hold frames interval
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* @ox_id_in_use: used to verify one at a time us of ox_id
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* @els_retries_remaining:for ELS, number of retries remaining
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* @els_req_cnt: number of outstanding ELS requests
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* @els_cmpl_cnt: number of outstanding ELS completions
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* @abort_cnt: Abort counter for debugging purpos
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* @current_state_name: current node state
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* @prev_state_name: previous node state
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* @current_evt: current event
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* @prev_evt: previous event
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* @targ: node is target capable
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* @init: node is init capable
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* @refound: Handle node refound case when node is being deleted
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* @els_io_pend_list: list of pending (not yet processed) ELS IOs
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* @els_io_active_list: list of active (processed) ELS IOs
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* @nodedb_state: Node debugging, saved state
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* @gidpt_delay_timer: GIDPT delay timer
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* @time_last_gidpt_msec:Start time of last target RSCN GIDPT
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* @wwnn: remote port WWNN
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* @wwpn: remote port WWPN
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*/
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struct efc_node {
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struct efc *efc;
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char display_name[EFC_NAME_LENGTH];
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struct efc_nport *nport;
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struct kref ref;
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void (*release)(struct kref *arg);
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bool hold_frames;
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bool els_io_enabled;
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bool send_plogi_acc;
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bool send_plogi;
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bool rscn_pending;
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bool fcp_enabled;
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bool attached;
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bool req_free;
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spinlock_t els_ios_lock;
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struct list_head els_ios_list;
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void *ini_node;
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void *tgt_node;
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struct efc_remote_node rnode;
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/* Declarations private to FC trannport */
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struct efc_sm_ctx sm;
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u32 evtdepth;
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enum efc_node_send_ls_acc send_ls_acc;
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void *ls_acc_io;
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u32 ls_acc_oxid;
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u32 ls_acc_did;
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enum efc_node_shutd_rsn shutdown_reason;
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bool targ;
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bool init;
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bool refound;
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struct efc_dma sparm_dma_buf;
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u8 service_params[EFC_SERVICE_PARMS_LENGTH];
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spinlock_t pend_frames_lock;
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struct list_head pend_frames;
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u32 pend_frames_processed;
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u32 ox_id_in_use;
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u32 els_retries_remaining;
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u32 els_req_cnt;
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u32 els_cmpl_cnt;
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u32 abort_cnt;
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char current_state_name[EFC_SM_NAME_LENGTH];
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char prev_state_name[EFC_SM_NAME_LENGTH];
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int current_evt;
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int prev_evt;
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void (*nodedb_state)(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *arg);
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struct timer_list gidpt_delay_timer;
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u64 time_last_gidpt_msec;
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char wwnn[EFC_WWN_LENGTH];
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char wwpn[EFC_WWN_LENGTH];
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};
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/**
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* NPIV port
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*
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* Collection of the information required to restore a virtual port across
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* link events
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* @wwnn: node name
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* @wwpn: port name
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* @fc_id: port id
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* @tgt_data: target backend pointer
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* @ini_data: initiator backend pointe
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* @nport: Used to match record after attaching for update
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*
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*/
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struct efc_vport {
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struct list_head list_entry;
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u64 wwnn;
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u64 wwpn;
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u32 fc_id;
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bool enable_tgt;
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bool enable_ini;
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void *tgt_data;
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void *ini_data;
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struct efc_nport *nport;
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};
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#define node_printf(node, fmt, args...) \
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efc_log_info(node->efc, "[%s] " fmt, node->display_name, ##args)
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/* Node SM IO Context Callback structure */
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struct efc_node_cb {
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int status;
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int ext_status;
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struct efc_hw_rq_buffer *header;
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struct efc_hw_rq_buffer *payload;
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struct efc_dma els_rsp;
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/* Actual length of data received */
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int rsp_len;
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};
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struct efc_hw_rq_buffer {
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u16 rqindex;
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struct efc_dma dma;
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};
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/**
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* FC sequence object
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*
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* Defines a general FC sequence object
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* @hw: HW that owns this sequence
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* @fcfi: FCFI associated with sequence
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* @header: Received frame header
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* @payload: Received frame header
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* @hw_priv: HW private context
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*/
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struct efc_hw_sequence {
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struct list_head list_entry;
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void *hw;
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u8 fcfi;
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struct efc_hw_rq_buffer *header;
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struct efc_hw_rq_buffer *payload;
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void *hw_priv;
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};
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enum efc_disc_io_type {
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EFC_DISC_IO_ELS_REQ,
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EFC_DISC_IO_ELS_RESP,
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EFC_DISC_IO_CT_REQ,
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EFC_DISC_IO_CT_RESP
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};
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struct efc_io_els_params {
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u32 s_id;
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u16 ox_id;
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u8 timeout;
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};
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struct efc_io_ct_params {
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u8 r_ctl;
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u8 type;
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u8 df_ctl;
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u8 timeout;
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u16 ox_id;
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};
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union efc_disc_io_param {
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struct efc_io_els_params els;
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struct efc_io_ct_params ct;
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};
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struct efc_disc_io {
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struct efc_dma req; /* send buffer */
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struct efc_dma rsp; /* receive buffer */
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enum efc_disc_io_type io_type; /* EFC_DISC_IO_TYPE enum*/
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u16 xmit_len; /* Length of els request*/
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u16 rsp_len; /* Max length of rsps to be rcvd */
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u32 rpi; /* Registered RPI */
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u32 vpi; /* VPI for this nport */
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u32 s_id;
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u32 d_id;
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bool rpi_registered; /* if false, use tmp RPI */
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union efc_disc_io_param iparam;
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};
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/* Return value indiacating the sequence can not be freed */
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#define EFC_HW_SEQ_HOLD 0
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/* Return value indiacating the sequence can be freed */
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#define EFC_HW_SEQ_FREE 1
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struct libefc_function_template {
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/*Sport*/
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int (*new_nport)(struct efc *efc, struct efc_nport *sp);
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void (*del_nport)(struct efc *efc, struct efc_nport *sp);
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/*Scsi Node*/
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int (*scsi_new_node)(struct efc *efc, struct efc_node *n);
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int (*scsi_del_node)(struct efc *efc, struct efc_node *n, int reason);
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int (*issue_mbox_rqst)(void *efct, void *buf, void *cb, void *arg);
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/*Send ELS IO*/
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int (*send_els)(struct efc *efc, struct efc_disc_io *io);
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|
/*Send BLS IO*/
|
|
int (*send_bls)(struct efc *efc, u32 type, struct sli_bls_params *bls);
|
|
/*Free HW frame*/
|
|
int (*hw_seq_free)(struct efc *efc, struct efc_hw_sequence *seq);
|
|
};
|
|
|
|
#define EFC_LOG_LIB 0x01
|
|
#define EFC_LOG_NODE 0x02
|
|
#define EFC_LOG_PORT 0x04
|
|
#define EFC_LOG_DOMAIN 0x08
|
|
#define EFC_LOG_ELS 0x10
|
|
#define EFC_LOG_DOMAIN_SM 0x20
|
|
#define EFC_LOG_SM 0x40
|
|
|
|
/* efc library port structure */
|
|
struct efc {
|
|
void *base;
|
|
struct pci_dev *pci;
|
|
struct sli4 *sli;
|
|
u32 fcfi;
|
|
u64 req_wwpn;
|
|
u64 req_wwnn;
|
|
|
|
u64 def_wwpn;
|
|
u64 def_wwnn;
|
|
u64 max_xfer_size;
|
|
mempool_t *node_pool;
|
|
struct dma_pool *node_dma_pool;
|
|
u32 nodes_count;
|
|
|
|
u32 link_status;
|
|
|
|
struct list_head vport_list;
|
|
/* lock to protect the vport list */
|
|
spinlock_t vport_lock;
|
|
|
|
struct libefc_function_template tt;
|
|
/* lock to protect the discovery library.
|
|
* Refer to efclib.c for more details.
|
|
*/
|
|
spinlock_t lock;
|
|
|
|
bool enable_ini;
|
|
bool enable_tgt;
|
|
|
|
u32 log_level;
|
|
|
|
struct efc_domain *domain;
|
|
void (*domain_free_cb)(struct efc *efc, void *arg);
|
|
void *domain_free_cb_arg;
|
|
|
|
u64 tgt_rscn_delay_msec;
|
|
u64 tgt_rscn_period_msec;
|
|
|
|
bool external_loopback;
|
|
u32 nodedb_mask;
|
|
u32 logmask;
|
|
mempool_t *els_io_pool;
|
|
atomic_t els_io_alloc_failed_count;
|
|
|
|
/* hold pending frames */
|
|
bool hold_frames;
|
|
/* lock to protect pending frames list access */
|
|
spinlock_t pend_frames_lock;
|
|
struct list_head pend_frames;
|
|
/* count of pending frames that were processed */
|
|
u32 pend_frames_processed;
|
|
|
|
};
|
|
|
|
/*
|
|
* EFC library registration
|
|
* **********************************/
|
|
int efcport_init(struct efc *efc);
|
|
void efcport_destroy(struct efc *efc);
|
|
/*
|
|
* EFC Domain
|
|
* **********************************/
|
|
int efc_domain_cb(void *arg, int event, void *data);
|
|
void
|
|
efc_register_domain_free_cb(struct efc *efc,
|
|
void (*callback)(struct efc *efc, void *arg),
|
|
void *arg);
|
|
|
|
/*
|
|
* EFC nport
|
|
* **********************************/
|
|
void efc_nport_cb(void *arg, int event, void *data);
|
|
struct efc_vport *
|
|
efc_vport_create_spec(struct efc *efc, u64 wwnn, u64 wwpn, u32 fc_id,
|
|
bool enable_ini, bool enable_tgt,
|
|
void *tgt_data, void *ini_data);
|
|
int efc_nport_vport_new(struct efc_domain *domain, u64 wwpn,
|
|
u64 wwnn, u32 fc_id, bool ini, bool tgt,
|
|
void *tgt_data, void *ini_data);
|
|
int efc_nport_vport_del(struct efc *efc, struct efc_domain *domain,
|
|
u64 wwpn, u64 wwnn);
|
|
|
|
void efc_vport_del_all(struct efc *efc);
|
|
|
|
/*
|
|
* EFC Node
|
|
* **********************************/
|
|
int efc_remote_node_cb(void *arg, int event, void *data);
|
|
void efc_node_fcid_display(u32 fc_id, char *buffer, u32 buf_len);
|
|
void efc_node_post_shutdown(struct efc_node *node, void *arg);
|
|
u64 efc_node_get_wwpn(struct efc_node *node);
|
|
|
|
/*
|
|
* EFC FCP/ELS/CT interface
|
|
* **********************************/
|
|
void efc_dispatch_frame(struct efc *efc, struct efc_hw_sequence *seq);
|
|
void efc_disc_io_complete(struct efc_disc_io *io, u32 len, u32 status,
|
|
u32 ext_status);
|
|
|
|
/*
|
|
* EFC SCSI INTERACTION LAYER
|
|
* **********************************/
|
|
void efc_scsi_sess_reg_complete(struct efc_node *node, u32 status);
|
|
void efc_scsi_del_initiator_complete(struct efc *efc, struct efc_node *node);
|
|
void efc_scsi_del_target_complete(struct efc *efc, struct efc_node *node);
|
|
void efc_scsi_io_list_empty(struct efc *efc, struct efc_node *node);
|
|
|
|
#endif /* __EFCLIB_H__ */
|