MFC r349499:

cxgbe/iw_cxgbe: Remove unused field from the endpoint structure.

MFC r343569, r345307

r343569:
cxgbe/iw_cxgbe: Fix an address calculation in the memory registration code that
was added in r342266.

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

r345307:
iw_cxgbe: Remove unused smac_idx from the ep structure.

Submitted by: Krishnamraju Eraparaju @ Chelsio

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 r320419, r337679, r338366, and r338652.

r320419:
cxgbe/iw_cxgbe: Disable debug output by default. The help text for the sysctl
already says that the default is 0.

r337679:
Remove unused stuff from iw_cxgbe.h

r338366:
cxgbe/iw_cxgbe: Fix iWARP RDMA + VIMAGE operation by setting the VNET
properly in a couple of places in the driver.

r338652:
cxgbe/iw_cxgbe: Fix reported build breakage when the kernel
configuration has "device cxgbe' but no VIMAGE.

Sponsored by: Chelsio Communications

MFC r327254, r327904, and r328994.

r327254:
cxgbe/iw_cxgbe: Fix iWARP over VLANs (catch up with r326169).

r327904:
cxgbe/iw_cxgbe: Remove duplicates to fix compilation with recent gcc.

r328994:
iw_cxgbe: Remove declaration of a function that no longer exists.

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

iw_cxgbe: Manually backport changes related to QP flush. This fixes a
panic where poll_cq sees an empty RQ while processing an incoming SEND
for a QP that is being taken down.

This is a direct commit to stable/11.

Sponsored by: Chelsio Communications

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

MFC r315201, r315920, r315921, r315922, r316008, and r316062.

r315201:
cxgbe(4): Fix an always-true assertion (reported by PVS-Studio).

sys/dev/cxgbe/t4_main.c: PVS-Studio: Expression is Always True (CWE-571) (3)

r315920:
cxgbe/iw_cxgbe: c4iw_connect should always returns a -ve errno on failure.

r315921:

cxgbe/iw_cxgbe: alloc_ep expects a gfp_t, and it's always ok to sleep during
alloc_ep.

r315922:
cxgbe/iw_cxgbe: allocations that use GFP_KERNEL (which is M_WAITOK on
FreeBSD) cannot fail.

r316008:
cxgbe/iw_cxgbe: Remove unused code.

r316062:
cxgbe/iw_cxgbe: Defer the handling of error CQEs and RDMA_TERMINATE to
the thread that deals with socket state changes. This eliminates
various bad races with the ithread.

MFC r314509 and r314578.

r314509:
cxgbe/iw_cxgbe: Do not check the size of the memory region being
registered. T4/5/6 have no internal limit on this size. This is
probably a copy paste from the T3 iw_cxgb driver.

r314578:
cxgbe/iw_cxgbe: Implement sq/rq drain operation.

ULPs can set a qp's state to ERROR and then post a work request on the
sq and/or rq. When the reply for that work request comes back it is
guaranteed that all previous work requests posted on that queue have
been drained.

Sponsored by: Chelsio Communications

MFC r314400:

cxgbe/iw_cxgbe: fix various double-close panics with iWARP sockets.

Sockets representing the TCP endpoints for iWARP connections are
allocated by the ibcore module. Before this revision they were closed
either by the ibcore module or the iw_cxgbe hardware driver depending on
the state transitions during connection teardown. This is error prone
and there were cases where both iw_cxgbe and ibcore closed the socket
leading to double-free panics. The fix is to let ibcore close the
sockets it creates and never do it in the driver.

- Use sodisconnect instead of soclose (preceded by solinger = 0) in the
driver to tear down an RDMA connection abruptly. This does what's
intended without releasing the socket's fd reference.

- Close the socket in ibcore when the iWARP iw_cm_id is destroyed. This
works for all kinds of sockets: clients that initiate connections,
listeners, and sockets accepted off of listeners.

Sponsored by: Chelsio Communications

MFC 304854: cxgbe/iw_cxgbe: Various fixes to the iWARP driver.

- Return appropriate error code instead of ENOMEM when sosend() fails in
send_mpa_req.
- Fix for problematic race during destroy_qp.
- Abortive close in the failure of send_mpa_reject() instead of normal close.
- Remove the unnecessary doorbell flowcontrol logic.

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

iw_cxgbe: Use vmem(9) to manage PBL and RQT allocations.

Submitted by: Krishnamraju Eraparaju at Chelsio
Reviewed by: Steve Wise
Sponsored by: Chelsio Communications

The idr_for_each() function is now part of the LinuxKPI. Use the
LinuxKPI's idr_for_each() function instead of the local one to avoid
compilation issues.

Discussed with: np @
MFC after: 1 week

iw_cxgbe/libcxgb4: Pull in many applicable fixes from the upstream Linux
iWARP driver and userspace library to the FreeBSD iw_cxgbe and libcxgb4.

This commit includes internal changesets 6785 8111 8149 8478 8617 8648
8650 9110 9143 9440 9511 9894 10164 10261 10450 10980 10981 10982 11730
11792 12218 12220 12222 12223 12225 12226 12227 12228 12229 12654.

Submitted by: Krishnamraju Eraparaju @ Chelsio
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

Fix for iWARP servers that listen on INADDR_ANY.

The iWARP Connection Manager (CM) on FreeBSD creates a TCP socket to
represent an iWARP endpoint when the connection is over TCP. For
servers the current approach is to invoke create_listen callback for
each iWARP RNIC registered with the CM. This doesn't work too well for
INADDR_ANY because a listen on any TCP socket already notifies all
hardware TOEs/RNICs of the new listener. This patch fixes the server
side of things for FreeBSD. We've tried to keep all these modifications
in the iWARP/TCP specific parts of the OFED infrastructure as much as
possible.

Submitted by: Krishnamraju Eraparaju @ Chelsio (with design inputs from Steve Wise)
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D4801

Merge LinuxKPI changes from DragonflyBSD:
- Define the kref structure identical to the one found in Linux.
- Update clients referring inside the kref structure.
- Implement kref_sub() for FreeBSD.

Reviewed by: np @
Sponsored by: Mellanox Technologies

Update the infiniband stack to Mellanox's OFED version 2.1.

Highlights:
- Multiple verbs API updates
- Support for RoCE, RDMA over ethernet

All hardware drivers depending on the common infiniband stack has been
updated aswell.

Discussed with: np @
Sponsored by: Mellanox Technologies
MFC after: 1 month

Update the OFED Linux compatibility layer and
Mellanox hardware driver(s):

- Properly name an inclusion guard
- Fix compile warnings regarding unsigned enums
- Add two new sysctl nodes
- Remove all empty linux header files
- Make an error printout more verbose
- Use "mod_delayed_work()" instead of
cancelling and starting a timeout.
- Implement more Linux scatterlist
functions.

MFC after: 3 days
Sponsored by: Mellanox Technologies

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