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Date: Fri, 9 Mar 2012 00:46:56 +0000
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: target-devel <target-devel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Cc: Andrew Vasquez <andrew.vasquez@...gic.com>,
Arun Easi <arun.easi@...gic.com>,
Giridhar Malavali <giridhar.malavali@...gic.com>,
James Bottomley <JBottomley@...allels.com>,
Christoph Hellwig <hch@....de>,
Roland Dreier <roland@...estorage.com>,
Joern Engel <joern@...fs.org>,
Madhuranath Iyengar <mni@...ingtidesystems.com>,
Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [RFC-v5 0/3] qla22xxx: target mode LLD changes + tcm_qla2xxx fabric module
From: Nicholas Bellinger <nab@...ux-iscsi.org>
Greetings all,
The following is the fifth RFC series for adding qla2xxx LLD target mode support
into mainline with 8.03.07.13-k @ v3.3-rc6 code. This along with accompanying
tcm_qla2xxx.ko fabric module using target-core v4.1 infrastructure allows Qlogic
>= 24xx series PCI-Express adapters to function in hardware Fibre Channel
target mode operation.
Along with a number of bugfixes from different folks, the biggest changes during
RFC-v5 is the removal of pre 24xx series (PCI-X) HW support from qla_target +
qla2xxx LLD changes (1K less LOC than RFC-v4), and enabling of ABORT_TASK usabe
in tcm_qla2xxx with the current set of v3.4 target-pending/for-next patches in
the queue for v3.4-rc1. This series is available directly here:
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git qla_tgt-rfc-v5
As before, this series has been broken up into reviewable sections and should
considered a 'for-3.4' -> 'for-3.5' item following the TODO items below.
The changes since RFC-v4 in mid December include:
*) Fix cmd_kref leak on target shutdown in qla_tgt_do_work() (roland)
*) Drop pre 24xx series support for target-mode (hch + nab)
*) Fix tcm_qla2xxx_do_rsp check condition cmd_kref leak (nab)
*) Hookup ABORT_TASK into qla_target/tcm_qla2xxx code (nab)
*) Convert to target_submit_tmr() usage in tcm_qla2xxx (andy + nab)
*) Fix sign of FCP_RESID field for status with RESID_OVER (roland)
*) Fix NULL pointer dereference for qla_tgt_do_work() w/ new session (joern)
*) Set disable_target_scan=1 when initiator-mode is disabled (nab)
*) Set correct nport_handle in __qla_tgt_send_term_exchange() (roland)
*) Seperate out per qla_tgt session management from qla_hw_data->hardware_lock
to use se_session->sess_kref (nab)
*) Convert qla_target.c to use qla2x00_start_iocbs() (nab)
Unfortuately little much progress has been made since RFC-v4 to address
the TODO item wrt to mixed target/initiator mode operation on a HW per port
(struct qla_hw_data) context basis between target-core and scsi-core subsystems.
Note to testers that patch #1 by default sets the following qla2xxx module
parameter at the head of qla_target.c to enforce qla2xxx LLD module wide
target-mode and disable initiator mode:
static char *qlini_mode = QLA2XXX_INI_MODE_STR_DISABLED;
module_param(qlini_mode, charp, S_IRUGO);
MODULE_PARM_DESC(qlini_mode,
"Determines when initiator mode will be enabled. Possible values: "
"\"exclusive\" - initiator mode will be enabled on load, "
"disabled on enabling target mode and then on disabling target mode "
"enabled back; "
"\"disabled\" (default) - initiator mode will never be enabled; "
"\"enabled\" - initiator mode will always stay enabled.");
For an initial mainline merge, we still expect to use initiator-mode by default
(QLA2XXX_INI_MODE_STR_EXCLUSIVE) and disable target mode by default. The qla2xxx
module parameter should be used to enable target mode for qla2xxx until scsi-core +
target-core interaction can be addressed.
(PING for feedback from hch, jejb, andrew, other folks on scsi-core + target-core
interaction here..?)
So along with resolving this issue wrt mixed T/I mode between subsystems, other
remaining items include:
*) Fix HW session level and ConfigFS ACL level shutdown race in target core (nab)
*) Move write-pending abort checks into process-context in target core (nab)
*) Finish up NPIV support for /sys/kernel/config/target/qla2xxx_npiv/ and determine
remaining NPIV I/O path items. (nab + madhu)
*) FC jammer testing to verify bugfix for SRRs with non zero relative offsets before
re-enabling them. (qlogic linux team)
*) Multi-queue support with qla_hw_data->mqenable=1 (arun + qlogic team)
*) Global event handling for active sessions in qla_tgt_reset() (nab)
*) Support for target mode on 16 Gb/sec hw (qlogic team)
Thanks again to everyone who has been testing lio-core code in their respective
setups, and to the Qlogic + Pure teams for their feedback and patches.
--nab
Nicholas Bellinger (3):
qla2xxx: Add LLD target-mode infrastructure for >= 24xx series
qla2xxx: Enable >= 24xx target-mode support in SCSI LLD
tcm_qla2xxx: Add >= 24xx series fabric module for target-core
drivers/scsi/qla2xxx/Kconfig | 8 +
drivers/scsi/qla2xxx/Makefile | 3 +-
drivers/scsi/qla2xxx/qla_attr.c | 5 +-
drivers/scsi/qla2xxx/qla_dbg.c | 5 +
drivers/scsi/qla2xxx/qla_dbg.h | 5 +
drivers/scsi/qla2xxx/qla_def.h | 69 +-
drivers/scsi/qla2xxx/qla_gbl.h | 7 +
drivers/scsi/qla2xxx/qla_gs.c | 4 +-
drivers/scsi/qla2xxx/qla_init.c | 92 +-
drivers/scsi/qla2xxx/qla_iocb.c | 102 +-
drivers/scsi/qla2xxx/qla_isr.c | 87 +-
drivers/scsi/qla2xxx/qla_mbx.c | 116 +-
drivers/scsi/qla2xxx/qla_mid.c | 17 +-
drivers/scsi/qla2xxx/qla_os.c | 133 +-
drivers/scsi/qla2xxx/qla_target.c | 4730 ++++++++++++++++++++++++++++++++++++
drivers/scsi/qla2xxx/qla_target.h | 984 ++++++++
drivers/scsi/qla2xxx/tcm_qla2xxx.c | 1961 +++++++++++++++
drivers/scsi/qla2xxx/tcm_qla2xxx.h | 149 ++
18 files changed, 8431 insertions(+), 46 deletions(-)
create mode 100644 drivers/scsi/qla2xxx/qla_target.c
create mode 100644 drivers/scsi/qla2xxx/qla_target.h
create mode 100644 drivers/scsi/qla2xxx/tcm_qla2xxx.c
create mode 100644 drivers/scsi/qla2xxx/tcm_qla2xxx.h
--
1.7.2.5
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