• Nicholas Bellinger's avatar
    [SCSI] qla2xxx: Add LLD target-mode infrastructure for >= 24xx series · 2d70c103
    Nicholas Bellinger authored
    Add LLD target mode for >= 24xx series HW.  This code was originally based on
    external qla2x00t module based on 8.02.01-k4, and has been refactored to
    push the bulk of code into mainline qla2xxx.ko LLD -> qla_target.c.
    
    The implementation uses internal workqueues for I/O context submission
    into tcm_qla2xxx code, and includes the struct qla_tgt_func_tmpl API for
    external interaction to allow qla2xxx LDD to function without direct
    target-core dependencies:
    
    It also enables qla_target.c usage within existing qla2xxx LLD code.
    This includes:
    
    *) Addition of target mode specific members to existing data
    structures in qla_def.h and struct qla_hw_data->tgt_ops using
    qla_target.h:struct qla_tgt_func_tmpl
    
    *) Addition of struct qla_tgt_func_tmpl and direct calls into
    qla_target.c logic w/ qlt_* prefixed functions.
    
    *) Addition of qla_iocb.c:qla2x00_req_pkt() for ring processing, and
    qla2x00_issue_marker() for handling request/response queue processing
    for target mode operation
    
    *) Addition of various qla_tgt_mode_enabled() logic checks in
    qla24xx_nvram_config(), qla2x00_initialize_adapter(), qla2x00_rff_id(),
    qla2x00_abort_isp(), qla24xx_modify_vp_config(), and
    qla2x00_vp_abort_isp().
    
    By default the new qlini_mode module parameter is setting initiator-mode
    to 'enabled' in order for 'modprobe qla2xxx' to continue to function as
    expected in initiator only mode.  Enabling target-mode operation will
    currently require a:
    
        modprobe qla2xxx qlini_mode="disabled"
    
    in order to explictly disabled initiator mode and allow target-mode
    to be enabled via tcm_qla2xxx configfs fabric callers.
    
    (nab: Convert to qlini_mode='enabled' by default in qla_target.c)
    (joern: Remove loop_id from qla_tgt_make_local_sess() arguments +
            Remove unused s_id + fix s_id endianness bug +
            simplify qla_tgt_abort_work)
    (gerard: fix section __exit mismatch in qla_tgt_exit)
    (arun: Capture ATIO queue during firmware dump + Send SCR in target mode +
           Target mode review comments)
    (roland: Don't create duplicate target sessions to address tearing down
             ACLs with IO in flight + Add missing call to qlt_fc_port_deleted
    	 call during qla2x00_schedule_rport_del timeout)
    Signed-off-by: default avatarNicholas A. Bellinger <nab@linux-iscsi.org>
    Signed-off-by: default avatarChad Dupuis <chad.dupuis@qlogic.com>
    Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
    2d70c103
qla_dbg.c 82.3 KB