Chelsio iSCSI target offload driver

This is v3 patch series for Chelsio iSCSI target offload driver(cxgbit.ko).

cxgbit.ko registers with iSCSI target transport and offloads multiple CPU intensive tasks to Chelsio T5 adapters.

T5 adapters has following offload features for
iSCSI
-TCP/IP offload
-iSCSI PDU recovery by reassembling TCP segments.
-Header and Data Digest offload.
-iSCSI segmentation offload(ISO).
-Direct Data Placement(DDP).

-v3
- updated commit messages (Sagi).
- dropped alloc/free pdu patch (Sagi).
- added single callback to transmit iscsi pdus (Sagi).
- replaced conn->network_transport by conn_transport->transport_type in text rsp patch(8/13).

-v2
- added hw offload transport type (Nicholas).
- added PDU alloc, free, xmit callbacks (Nicholas).
- created single patch for all cxgbit.ko files (Nicholas).
- merged definition and usage of int (*iscsit_validate_params)() in a single patch (Christoph).
- merged definition and usage of void (*iscsit_release_cmd)() in a single patch (Christoph).
- renamed void (*iscsit_rx_pdu)() to void (*iscsit_get_rx_pdu)() (Sagi).
- added dependency on INET in Kconfig (Arnd).
- added check for NULL sg in cxgbit_set_one_ppod() (Dan Carpenter).

Please review.

Thanks

Varun Prakash (13):
iscsi-target: add int (*iscsit_xmit_pdu)()
iscsi-target: add void (*iscsit_release_cmd)()
iscsi-target: add void (*iscsit_get_rx_pdu)()
iscsi-target: split iscsi_target_rx_thread()
iscsi-target: add int (*iscsit_validate_params)()
iscsi-target: add void (*iscsit_get_r2t_ttt)()
iscsi-target: move iscsit_thread_check_cpumask()
iscsi-target: use conn_transport->transport_type in text rsp
iscsi-target: add new offload transport type
iscsi-target: clear tx_thread_active
iscsi-target: call complete on conn_logout_comp
iscsi-target: export symbols
cxgbit: add files for cxgbit.ko

 drivers/infiniband/ulp/isert/ib_isert.c           |   10 +
 drivers/target/iscsi/Kconfig                      |    2 +
 drivers/target/iscsi/Makefile                     |    1 +
 drivers/target/iscsi/cxgbit/Kconfig               |    7 +
 drivers/target/iscsi/cxgbit/Makefile              |    6 +
 drivers/target/iscsi/cxgbit/cxgbit.h              |  353 ++++
 drivers/target/iscsi/cxgbit/cxgbit_cm.c           | 2086 +++++++++++++++++++++
 drivers/target/iscsi/cxgbit/cxgbit_ddp.c          |  325 ++++
 drivers/target/iscsi/cxgbit/cxgbit_lro.h          |   72 +
 drivers/target/iscsi/cxgbit/cxgbit_main.c         |  701 +++++++
 drivers/target/iscsi/cxgbit/cxgbit_target.c       | 1561 +++++++++++++++
 drivers/target/iscsi/iscsi_target.c               |  684 +++----
 drivers/target/iscsi/iscsi_target_configfs.c      |   76 +
 drivers/target/iscsi/iscsi_target_datain_values.c |    1 +
 drivers/target/iscsi/iscsi_target_login.c         |   13 +-
 drivers/target/iscsi/iscsi_target_nego.c          |    1 +
 drivers/target/iscsi/iscsi_target_parameters.c    |    1 +
 drivers/target/iscsi/iscsi_target_util.c          |    5 +
 include/target/iscsi/iscsi_target_core.h          |   27 +
 include/target/iscsi/iscsi_transport.h            |   40 +
 20 files changed, 5546 insertions(+), 426 deletions(-)
 create mode 100644 drivers/target/iscsi/cxgbit/Kconfig
 create mode 100644 drivers/target/iscsi/cxgbit/Makefile
 create mode 100644 drivers/target/iscsi/cxgbit/cxgbit.h
 create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_cm.c
 create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_ddp.c
 create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_lro.h
 create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_main.c
 create mode 100644 drivers/target/iscsi/cxgbit/cxgbit_target.c

2.0.2