MFC r339891, r340063, r342266, r342270, r342272, r342288-r342289

r339891:
cxgbe/iw_cxgbe: Install the socket upcall before calling soconnect to
ensure that it always runs when soisconnected does.

Submitted by: Krishnamraju Eraparaju @ Chelsio
Sponsored by: Chelsio Communications

r340063:
cxgbe/iw_cxgbe: Suppress spurious "Unexpected streaming data ..."
messages.

Submitted by: Krishnamraju Eraparaju @ Chelsio
Sponsored by: Chelsio Communications

r342266:
cxgbe/iw_cxgbe: Use DSGLs to write to card's memory when appropriate.

Submitted by: Krishnamraju Eraparaju @ Chelsio
Sponsored by: Chelsio Communications

r342270:
cxgbe/iw_cxgbe: Add a knob for testing that lets iWARP connections cycle
through 4-tuples quickly.

Submitted by: Krishnamraju Eraparaju @ Chelsio
Sponsored by: Chelsio Communications

r342272:
cxgbe/iw_cxgbe: Use -ve errno when interfacing with linuxkpi/OFED.

Submitted by: Krishnamraju Eraparaju @ Chelsio
Sponsored by: Chelsio Communications

r342288:
cxgbe/iw_cxgbe: Do not terminate CTRx messages with \n.

r342289:
cxgbe/iw_cxgbe: Remove redundant CTRs from c4iw_alloc/c4iw_rdev_open.
This information is readily available elsewhere.

Sponsored by: Chelsio Communications

MFC r303505, r303506, r303512, r303513, r303646, r320418, r323082,
r326169, r326563, r326649, r326716, r326764, r326765 and r329222:

RoCE/infiniband/iWarp upgrade to Linux 4.9 for kernel and userspace.
This commit merges projects/bsd_rdma_4_9 to 11-stable.

Compatibility wrappers have been made for existing 11-stable ibcore
APIs, including ib_reg_phys_mr().
Refer to "sys/ofed/include/rdma/ib_verbs_compat.h" for more information.

The iw_cxgb driver has not been updated and has been disconnected from
the build.

Sponsored by: Mellanox Technologies

MFC r326169 and r326563:
RoCE/infiniband upgrade to Linux v4.9 for kernel and userspace.

List of kernel sources used:
============================

1) kernel sources were cloned from git://github.com/torvalds/linux.git
Top commit 69973b830859bc6529a7a0468ba0d80ee5117826 - tag: v4.9, linux-4.9

2) krping was cloned from https://github.com/larrystevenwise/krping
Top commit 292a2f1abf0348285e678a82264740d52e4dcfe4

List of userspace sources used:
===============================

1) rdma-core was cloned from https://github.com/linux-rdma/rdma-core.git
Top commit d65138ef93af30b3ea249f3a84aa6a24ba7f8a75

2) OpenSM was cloned from git://git.openfabrics.org/~halr/opensm.git
Top commit 85f841cf209f791c89a075048a907020e924528d

3) libibmad was cloned from git://git.openfabrics.org/~iraweiny/libibmad.git
Tag 1.3.13 with some additional patches from Mellanox.

4) infiniband-diags was cloned from git://git.openfabrics.org/~iraweiny/infiniband-diags.git
Tag 1.6.7 with some additional patches from Mellanox.

NOTES:
======

1) The mthca driver has been removed from userspace.
2) All GPLv2 only sources have been removed and where applicable
rewritten from scratch under a BSD license.
3) List of fully supported drivers in userspace and kernel:
a) iw_cxgbe (Chelsio)
b) mlx4ib (Mellanox)
c) mlx5ib (Mellanox)
4) WITH_OFED=YES is still required by make in order to build
OFED userspace and kernel code.
5) Full support has been added for routable RoCE, RoCE v2.

MFC r326649:
Disconnect OFED after r326169 broke all DIRDEPS support for it.

MFC r326716:
Correctly define the unordered_map namespace in ofed/libibnetdisc .

This should fix ofed/libibnetdisc compilation with C-compilers
different from clang and GCC v4.2.1.

Submitted by: kib
Sponsored by: Mellanox Technologies

MFC r326764:
ofed: Remove duplicated symbols from the version file.

ld.bfd accepts multiple listing of the same symbol in the version script.
lld is stricter and errors out. Since arm64 and sometimes amd64 use lld,
we should correct this cosmetic issue.

Sponsored by: Mellanox Technologies
Reviewed by: hselasky
Differential revision: https://reviews.freebsd.org/D13329

MFC r326765:
ofed: Define barriers for mips and arm.

I used the strongest barriers available on the architectures, so if
the future analysis show that it is excessive, the barriers could be
relaxed. Still, it is unlikely that it is meaningful to run IB on 32bit
ARM or current MIPS machines, so the change is to make WITH_OFED to pass
tinderbox.

Sponsored by: Mellanox Technologies
Reviewed by: hselasky
Differential revision: https://reviews.freebsd.org/D13329

MFC r303505:
sdp: Use an mbufq for received control packets.

This is simpler than the hand-rolled queue, and fixes a use-after-free.

Sponsored by: EMC / Isilon Storage Division

MFC r303506:
sdp: Destroy the PCB lock before freeing to the zone.

Sponsored by: EMC / Isilon Storage Division

MFC r303512:
sdp: Use malloc(9) instead of the Linux compat layer.

SDP transmit and receive rings are always created in a sleepable context,
so we can use M_WAITOK and remove error checks.

Sponsored by: EMC / Isilon Storage Division

MFC r303513:
sdp: Destroy the RDMA ID after destroying the connection's queue pair.

This is the ordering documented by rdma_destroy_qp(). Also add a useful
KASSERT to sdp_pcbfree().

Sponsored by: EMC / Isilon Storage Division

MFC r303646:
ipoib: Bound the number of egress mbufs buffered during pathrec lookups.

In pathological situations where the master subnet manager becomes
unresponsive for an extended period, we may otherwise end up queuing all
of the system's mbufs while waiting for a response to a path record lookup.

This addresses the same issue as commit 1e85b806f9 in Linux.

Reviewed by: cem, ngie
Sponsored by: EMC / Isilon Storage Division

MFC r329222:
Import the mthca kernel side infiniband driver from Linux 4.9 and fix
compilation under FreeBSD. The mthca driver was temporarily removed as
part of the Linux 4.9 RoCE/infinband upgrade.

Top commit in Linux source tree:
69973b830859bc6529a7a0468ba0d80ee5117826

Sponsored by: Mellanox Technologies

MFC r320418. Note that the socket lock _is_ the same as so_rcv's lock
in 11 and this is a no-op in this branch.

Sponsored by: Chelsio Communications

MFC r323082:
cxgbe/iw_cxgbe: Set TCP_NODELAY before initiating connection so that
t4_tom picks it up right away. This is less work than waiting for
the connection to be established before applying the setting.

Sponsored by: Chelsio Communications

Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

MFC r311880, r314167, r316118, r316571, r316573, r316580, r316936-r316937,
r316940, and r317410.

r311880:
The iw_cxgb and iw_cxgbe drivers should not use a FreeBSD device_t where
a linuxkpi style device is expected. If OFED/linuxkpi actually starts
using this field then we'll have to figure out whether to create fake
devices for these drivers or have linuxkpi deal with NULL device.

This mismatch was first reported as part of D6585.

r314167:
cxgbe/iw_cxgbe: Minor changes for T6.

r316118:
cxgbe/iw_cxgbe: T6 has no limit on the amount of memory that can be
registered in one ib_reg_phys_mr.

r316571:
cxgbe/iw_cxgbe: Remove bad cast that resulted in incorrect length for
memory regions larger than 4GB.

r316573:
cxgbe/iw_cxgbe: Replace a magic constant with something more readable
(and accurate).

T4 and later have an extra bit for page shift so the maximum page size
is 8TB (shift of 12 + 31) instead of 128MB (12 + 15). This saves space
in the chip's PBL (physical buffer list) when registering very large
memory regions.

r316580:
cxgbe/iw_cxgbe: Remove another bad cast. This should have been
included in r316571.

r316936:
cxgbe/iw_cxgbe: hw supports 64K (not 32K) Protection Domains.

r316937:
cxgbe/iw_cxgbe: Report accurate page_size_cap in ib_query_device.

r316940:
cxgbe/iw_cxgbe: Report the actual values of various parameters as
configured by the firmware.

r317410:
cxgbe/iw_cxgbe: Pull in some updates to c4iw_wait_for_reply from the
iw_cxgb4 Linux driver.

Sponsored by: Chelsio Communications

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

cxgbe(4): Changes to the CPL-handler registration mechanism and code
related to "shared" CPLs.

a) Combine t4_set_tcb_field and t4_set_tcb_field_rpl into a single
function. Allow callers to direct the response to any iq. Tidy up
set_ulp_mode_iscsi while there to use names from t4_tcb.h instead of
magic constants.

b) Remove all CPL handler tables from struct adapter. This reduces its
size by around 2KB. All handlers are now registered at MOD_LOAD instead
of attach or some kind of initialization/activation. The registration
functions do not need an adapter parameter any more.

c) Add per-iq handlers to deal with CPLs whose destination cannot be
determined solely from the opcode. There are 2 such CPLs in use right
now: SET_TCB_RPL and L2T_WRITE_RPL. The base driver continues to send
filter and L2T_WRITEs over the mgmtq and solicits the reply on fwq.
t4_tom (including the DDP code) now uses the port's ctrlq to send
L2T_WRITEs and SET_TCB_FIELDs and solicits the reply on an ofld_rxq.
fwq and ofld_rxq have different handlers that know what kind of tid to
expect in the reply. Update t4_write_l2e and callers to to support any
wrq/iq combination.

Approved by: re@ (kib@)
Sponsored by: Chelsio Communications

cxgbe(4): Add a struct sge_params to store per-adapter SGE parameters.
Move the code that reads all the parameters to t4_init_sge_params in the
shared code. Use these per-adapter values instead of globals.

Sponsored by: Chelsio Communications

Rename linuxapi[.ko] into linuxkpi[.ko], to reflect that it is a
kernel programming interface module, KPI, to avoid confusion with the
existing Linux userspace binary compatibility shims. Bump the
FreeBSD_version number.

Reviewed by: np @
Suggested by: dumbbell @
Sponsored by: Mellanox Technologies

cxgbe(4): tidy up some of the interaction between the Upper Layer
Drivers (ULDs) and the base if_cxgbe driver.

Track the per-adapter activation of ULDs in a new "active_ulds" field.
This was done pretty arbitrarily before this change -- via TOM_INIT_DONE
in adapter->flags for TOM, and the (1 << MAX_NPORTS) bit in
adapter->offload_map for iWARP.

iWARP and hw-accelerated iSCSI rely on the TOE (supported by the TOM
ULD). The rules are:
a) If the iWARP and/or iSCSI ULDs are available when TOE is enabled then
iWARP and/or iSCSI are enabled too.
b) When the iWARP and iSCSI modules are loaded they go looking for
adapters with TOE enabled and enable themselves on that adapter.
c) You cannot deactivate or unload the TOM module from underneath iWARP
or iSCSI. Any such attempt will fail with EBUSY.

MFC after: 2 weeks

Add missing linuxapi module dependencies and always use the FreeBSD
"MODULE_VERSION" macro definition. Remove the redefinition of the
"MODULE_VERSION" macro from the Linux kernel compatibility API.

MFC after: 1 month
Reported by: np@
Sponsored by: Mellanox Technologies

Fix typo in previous commit.

iw_cxgbe should have a dependency on t4nex.

Reported by: trasz@

iw_cxgbe: iWARP driver for Chelsio T4/T5 chips. This is a straight port
of the iw_cxgb4 found in OFED distributions.

Obtained from: Chelsio