MFC r319872, r321063, r321582, r322034, r322425, r322962, r322985,
r325596, r326026, r328420, r331472, r333276, r333650, r333652, r334406,
r334409-r334410, r334489, r336042, r340651, r342603, and r345083.

This updates the cxgbe firmwares in stable/10 and also pulls in support
for some newer boards and flash parts.

r319872:
cxgbe(4): Do not request an FEC setting that the port does not support.

r321063:
cxgbe(4): Various link/media related improvements.

r321582:
cxgbe(4): Some updates to the common code.

r322034:
cxgbe(4): Always use the first and not the last virtual interface
associated with a port in begin_synchronized_op.

r322425:
cxgbe(4): Save the last reported link parameters and compare them with
the current state to determine whether to generate a link-state change
notification. This fixes a bug introduced in r321063 that caused the
driver to sometimes skip these notifications.

r322962:
cxgbe(4): Remove write only variable from t4_port_init.

r322985:
cxgbe(4): Maintain one ifmedia per physical port instead of one per
Virtual Interface (VI). All autonomous VIs that share a port share the
same media.

r325596:
cxgbe(4): Do not request settings not supported by the port.

r326026:
cxgbe(4): Add a custom board to the device id list.

r328420:
cxgbe(4): Do not display harmless warning in non-debug builds.

r331472:
cxgbe(4): Always initialize requested_speed to a valid value.

This fixes an avoidable EINVAL when the user tries to disable AN after
the port is initialized but l1cfg doesn't have a valid speed to use.

r333276:
cxgbe(4): Update all firmwares to 1.19.1.0.

r333650:
cxgbe(4): Claim some more T5 and T6 boards.

r333652:
cxgbe(4): Add support for two more flash parts.

r334406:
cxgbe(4): Consider all supported speeds when building the ifmedia list
for a port. Fix other related issues while here:
- Require port lock for access to link_config.
- Allow 100Mbps operation by tracking the speed in Mbps. Yes, really.
- New port flag to indicate that the media list is immutable. It will
be used in future refinements.

This also fixes a bug where the driver reports incorrect media with
recent firmwares.

r334409:
cxgbe(4): Implement ifm_change callback.

r334410:
cxgbe(4): Use ifm for ifmedia just like the rest of the kernel.

No functional change.

r334489:
cxgbe(4): Include full duplex mediaopt in media that can be reported as
active. Always report full duplex in active media.

r336042:
cxgbe(4): Assume that any unknown flash on the card is 4MB and has 64KB
sectors, instead of refusing to attach to the card.

r340651:
cxgbe(4): Update T4/5/6 firmwares to 1.22.0.3.

r342603:
cxgbe(4): Attach to two T540 variants.

r345083:
cxgbe(4): Update T4/5/6 firmwares to 1.23.0.0.

MFC r323006 and r324386.

This brings the cxgbe(4) firmware up to 1.16.63.0.

Sponsored by: Chelsio Communications

MFC r318762:

cxgbe(4): Update the T4, T5, and T6 firmwares to 1.16.45.0.

The latest firmware has a number of link related fixes, support for a
new custom card, and the fix for a bug that affected rate limiting on
FreeBSD.

Relnotes: Yes
Sponsored by: Chelsio Communications

MFC r317702, r317847, r318307

r317702:
cxgbe(4): Support routines for Tx traffic scheduling.

- Create a new file, t4_sched.c, and move all of the code related to
traffic management from t4_main.c and t4_sge.c to this file.
- Track both Channel Rate Limiter (ch_rl) and Class Rate Limiter (cl_rl)
parameters in the PF driver.
- Initialize all the cl_rl limiters with somewhat arbitrary default
rates and provide routines to update them on the fly.
- Provide routines to reserve and release traffic classes.

r317847:
cxgbe(4): The Tx scheduler initialization either works or doesn't. It
doesn't need a refresh in either case.

r318307:
cxgbe(4): Avoid an out of bounds access when an attempt to unbind a tx
queue from a traffic class fails.

Sponsored by: Chelsio Communications

MFC r310151 and r311173.

r310151:
cxgbe(4): Changes to the default T6 firmware configuration file.

- Disable features that are not supported or not used on FreeBSD.
- Increase the RSS table slice per interface.
- Increase the share of the TCAM reserved for filtering.

r311173:
cxgbe(4): Update T4, T5 and T6 firmwares to 1.16.26.0.

Sponsored by: Chelsio Communications

MFC 309613: cxgbe(4): Update firmwares from version 1.16.12.0 to 1.16.22.0.

Sponsored by: Chelsio Communications

MFC 305695,305696,305699,305702,305703,305713,305715,305827,305852,305906,
305908,306062,306063,306137,306138,306206,306216,306273,306295,306301,
306465,309302:
Add support for adapters using the Terminator T6 ASIC.

305695:
cxgbe(4): Set up fl_starve_threshold2 accurately for T6.

305696:
cxgbe(4): Use correct macro for header length with T6 ASICs. This
affects the transmit of the VF driver only.

305699:
cxgbe(4): Update the pad_boundary calculation for T6, which has a
different range of boundaries.

305702:
cxgbe(4): Use smaller min/max bursts for fl descriptors with a T6.

305703:
cxgbe(4): Deal with the slightly different SGE_STAT_CFG in T6.

305713:
cxgbe(4): Add support for additional port types and link speeds.

305715:
cxgbe(4): Catch up with the rename of tlscaps -> cryptocaps. TLS is one
of the capabilities of the crypto engine in T6.

305827:
cxgbe(4): Use the interface's viid to calculate the PF/VF/VFValid fields
to use in tx work requests.

305852:
cxgbe(4): Attach to cards with the Terminator 6 ASIC. T6 cards will
come up as 't6nex' nexus devices with 'cc' ports hanging off them.

The T6 firmware and configuration files will be added as soon as they
are released. For now the driver will try to work with whatever
firmware and configuration is on the card's flash.

305906:
cxgbe/t4_tom: The SMAC entry for a VI is at a different location in the T6.

305908:
cxgbe/t4_tom: Update the active/passive open code to support T6. Data
path works as-is.

306062:
cxgbe(4): Show wcwr_stats for T6 cards.

306063:
cxgbe(4): Setup congestion response for T6 rx queues.

306137:
cxgbetool: Add T6 support to the SGE context decoder.

306138:
Fix typo.

306206:
cxgbe(4): Catch up with the different layout of WHOAMI in T6.

Note that the code moved below t4_prep_adapter() as part of this change
because now it needs a working chip_id().

306216:
cxgbe(4): Fix the output of the "tids" sysctl on T6.

306273:
cxgbe(4): Fix netmap with T6, which doesn't encapsulate SGE_EGR_UPDATE
message inside a FW_MSG. The base NIC already deals with updates in
either form.

306295:
cxgbe(4): Support SIOGIFXMEDIA so that ifconfig displays correct media
for 25Gbps and 100Gbps ports. This should have been part of r305713,
which is when the driver first started reporting extended media types.

306301:
cxgbe(4): Use the port's top speed to figure out whether it is "high
speed" or not (for the purpose of calculating the number of queues etc.)
This does the right thing for 25Gbps and 100Gbps ports.

306465:
cxgbe(4): Claim the T6 -DBG card.

309302:
cxgbe(4): Include firmware for T6 cards in the driver. Update all
firmwares to 1.16.12.0.

Sponsored by: Chelsio Communications

MFC 303522,303647,303860,303880,304168-304170,304479,304482,304485,305548,
305549:
Chelsio T4/T5 VF driver.

303522:
Various fixes to the t4/5nex character device.

- Remove null open/close methods.
- Don't set d_flags to 0 explicitly.
- Remove t5_cdevsw as the .d_name member isn't really used and doesn't
warrant a separate cdevsw just for the name.
- Use ENOTTY as the error value for an unknown ioctl request.
- Use make_dev_s() to close race with setting si_drv1.

303647:
Store the offset of the KDOORBELL and GTS registers in the softc.

VF devices use a different register layout than PF devices. Storing
the offset in a value in the softc allows code to be shared between the
PF and VF drivers.

303860:
Reserve an adapter flag IS_VF to mark VF devices vs PF devices.

303880:
Track the base absolute ID of ingress and egress queues.

Use this to map an absolute queue ID to a logical queue ID in interrupt
handlers. For the regular cxgbe/cxl drivers this should be a no-op as
the base absolute ID should be zero. VF devices have a non-zero base
absolute ID and require this change. While here, export the absolute ID
of egress queues via a sysctl.

304168:
Make SGE parameter handling more VF-friendly.

Add fields to hold the SGE control register and free list buffer sizes to
the sge_params structure. Populate these new fields in
t4_init_sge_params() for PF devices and change t4_read_chip_settings() to
pull these values out of the params structure instead of reading
registers directly. This will permit t4_read_chip_settings() to be reused
for VF devices which cannot read SGE registers directly.

While here, move the call to t4_init_sge_params() to
get_params__post_init(). The VF driver will populate the SGE parameters
structure via a different method before calling t4_read_chip_settings().

304169:
Update mailbox writes to work with VF devices.

- Use alternate register locations for the data and control registers for
VFs.
- Do a dummy read to force the writes to the mailbox data registers to
post before the write to the control register on VFs.
- Do not check the PCI-e firmware register for errors on VFs.

304170:
Add support for register dumps on VF devices.

- Add handling of VF register sets to t4_get_regs_len() and t4_get_regs().
- While here, use t4_get_regs_len() in the ioctl handler for regdump
instead of inlining it.

304479:
Add structures for VF-specific adapter parameters.

While here, mark which parameters are PF-specific and which are
VF-specific.

304482:
Adjust t4_port_init() to work with VF devices.

Specifically, the FW_PORT_CMD may or may not work for a VF (the PF
driver can choose whether or not to permit access to this command),
so don't attempt to fetch port information on a VF if permission is
denied by the PF.

304485:
Reorder sysctls so that nodes shared with the VF driver are added first.

This permits a single early return for VF devices in the routines that
add sysctl nodes.

305548:
Don't break out of the m_advance() loop if len drops to zero.

If a packet contains the Ethernet header (14 bytes) in the first mbuf
and the payload (IP + UDP + data) in the second mbuf, then the attempt
to fetch the l3hdr will return a NULL pointer. The first loop iteration
will drop len to zero and exit the loop without setting 'p'. However,
the desired data is at the start of the second mbuf, so the correct
behavior is to loop around and let the conditional set 'p' to m_data of
the next mbuf (and leave offset as 0).

305549:
Chelsio T4/T5 VF driver.

The cxgbev/cxlv driver supports Virtual Function devices for Chelsio
T4 and T4 adapters. The VF devices share most of their code with the
existing PF4 driver (cxgbe/cxl) and as such the VF device driver
currently depends on the PF4 driver.

Similar to the cxgbe/cxl drivers, the VF driver includes a t4vf/t5vf
PCI device driver that attaches to the VF device. It then creates
child cxgbev/cxlv devices representing ports assigned to the VF.
By default, the PF driver assigns a single port to each VF.

t4vf_hw.c contains VF-specific routines from the shared code used to
fetch VF-specific parameters from the firmware.

t4_vf.c contains the VF-specific PCI device driver and includes its
own attach routine.

VF devices are required to use a different firmware request when
transmitting packets (which in turn requires a different CPL message
to encapsulate messages). This alternate firmware request does not
permit chaining multiple packets in a single message, so each packet
results in a firmware request. In addition, the different CPL message
requires more detailed information when enabling hardware checksums,
so parse_pkt() on VF devices must examine L2 and L3 headers for all
packets (not just TSO packets) for VF devices. Finally, L2 checksums
on non-UDP/non-TCP packets do not work reliably (the firmware trashes
the IPv4 fragment field), so IPv4 checksums for such packets are
calculated in software.

Most of the other changes in the non-VF-specific code are to expose
various variables and functions private to the PF driver so that they
can be used by the VF driver.

Note that a limited subset of cxgbetool functions are supported on VF
devices including register dumps, scheduler classes, and clearing of
statistics. In addition, TOE is not supported on VF devices, only for
the PF interfaces.

Sponsored by: Chelsio Communications

MFC 297776,297777,297779: Add DDB commands to cxgbe(4).

297776:
Add a function to lookup a device_t object by name.

This just walks the global list of devices looking for one with the
requested name. The one use case outside of devctl2's implementation
is for DDB commands that wish to lookup devices by name.

297777:
Add a 'show t4 tcb <nexus> <tid>' command to dump a TCB from DDB.

This allows the contents of a TCB to be extracted from a T4/T5 card in
DDB after a panic.

297779:
Add a 'show t4 devlog <nexus>' DDB command.

This command displays the adapter's firmware device log similar to the
dev.<nexus>.misc.devlog sysctl.

Sponsored by: Chelsio Communications

MFC 295778,296249,296333,296383,296471,296478,296481,296485,296488-296491,
296493-296496,296544,296710-296711,297863,299685: Catch up to changes to
the internal shared code.

Note that this merge includes two different firmware updates, but the
effective change is to update to the last version (1.15.37.0). As such,
I've trimmed the log message of the first update (1.15.28.0).

In addition, the M_WAIT macro added in t4_regs.h had to be renamed to
CXGBE_M_WAIT to avoid a collision on 10.x that is not present on 11.

295778:
cxgbe: catch up with the latest hardware-related definitions.

296249:
cxgbe(4): Update T5 and T4 firmwares to 1.15.28.0.

296333:
cxgbe(4): First of many changes to reduce diffs with internal shared
code:

- Rename some CamelCase variables.
- s/t4_link_start/t4_link_l1cfg/g
- Pull in t4_get_port_type_description.
- Move t4_wait_op_done to t4_hw.c.
- Flip the order of the RDMA stats.
- Remove unsused function t4_iq_start_stop.
- Move t4_wait_op_done and t4_wait_op_done_val to t4_hw.c

296383:
cxgbe(4): Very basic T6 awareness. This is part of ongoing work to
update to the latest internal shared code.

- Add a chip_params structure to keep track of hardware constants for
all generations of Terminators handled by cxgbe.
- Update t4_hw_pci_read_cfg4 to work with T6.
- Update the hardware debug sysctls (hidden within dev.<tNnex>.<n>.misc.*) to
work with T6. Most of the changes are in the decoders for the CIM
logic analyzer and the MPS TCAM.
- Acquire the regwin lock around indirect register accesses.

296471:
cxgbe(4): Updated register dumps.

- Get the list of registers to read during a regdump from the shared
code instead of the OS specific code. This follows a similar move
internally. The shared code includes the list for T6.

- Update cxgbetool to be able to decode T5 VF, T6, and T6 VF register
dumps (and catch up with some updates to T4 and T5 register decode).

296478:
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.

296481:
cxgbe(4): Overhaul the shared code that deals with the chip's TP block,
which is responsible for filtering and RSS.

Add the ability to use filters that match on PF/VF (aka "VNIC id") while
here. This is mutually exclusive with filtering on outer VLAN tag with
Q-in-Q.

296485:
cxgbe(4): Update the interrupt handlers for hardware errors.

296488:
cxgbe(4): Updates to mailbox routines in the shared code.

296489:
cxgbe(4): Updates to the shared routines that deal with the serial EEPROM,
flash, and VPD.

296490:
cxgbe(4): Remove __devinit and SPEED_<foo> as part of catch up with
internal shared code.

296491:
cxgbe(4): Updates to shared routines that get/set various parameters via
the firmware.

296493:
cxgbe(4): Use t4_link_down_rc_str in shared code to decode the reason
the link is down, instead of doing it in OS specific code.

296494:
cxgbe(4): Many new functions in the shared code, unused at this time.

296495:
cxgbe(4): Fix t4_tp_get_rdma_stats.

296496:
cxgbe(4): Minor updates to the shared routines that deal with firmware images.

296544:
cxgbe(4): Reshuffle and rototill t4_hw.c, solely to reduce diffs with
the internal shared code.

296710:
cxgbe(4): Catch up with the latest list of card capabilities as reported
by the firmware.

296711:
cxgbe(4): Fix typo in previous commit.

297863:
Rename the 'M_B' macro in t4_regs.h to 'CXGBE_M_B'.

This fixes a conflict with the M_B macro in powerpc's
<machine/db_machdep.h> exposed by the recent addition of DDB commands
to the cxgbe driver.

299685:
cxgbe(4): Update T5 and T4 firmwares to 1.15.37.0.

These firmwares were obtained from the "Chelsio T5/T4 Unified Wire
v2.12.0.3 for Linux" release. Changes since 1.14.4.0 (which is the
firmware in -STABLE branches) are in the "Release Notes" accompanying
the Unified Wire release and are copy-pasted here as well.

22.1. T5 Firmware
+++++++++++++++++++++++++++++++++

Version : 1.15.37.0
Date : 04/27/2016
================================================================================

FIXES
-----

BASE:
- Fixed an issue in FW_RSS_VI_CONFIG_CMD handling where the default ingress
queue was ignored.
- Fixed an issue where adapter failed to load fw by adjusting DRAM frequency.
- Fixed an issue in watchdog which was causing VM bring-up failure after reboot.
- Fixed 40G link failures with some switches when auto-negotiation enabled.
- Fixed to improve on link bring-up time.
- Per port buffer groups size doubled to improve performance.
- Fixed an issue where bogus d3hot bits were set causing traffic stall.
- Fixed an issue where sometimes adapter was not seen after reboot.
- Fixed an issue where iWARP was crashing in conjunction with traffic management.
- Fixed an issue where link failed to come up after removing twinax cable and
inserting optical module.

ETH
- Fixed a link flap issue on T580-CR.

OFLD
- Fixed a potential iSCSI data corruption issue by disabling RxFragEn flag.

FOiSCSI
- Fixed an issue in recovery path where connection was getting closed before
recovery processing was done.
- Fixed an issue in TCP port reuse.
- Fixed an issue in recovery path when large number (>64) of iSCSI connections
were in use.
- Returned ENETUNREACH if IP was not been provisioned yet and driver tried to
use given inerface.
- Fixed an issue where fw was sending ENETUNREACH event for normal tcp
disconnection.

DCBX
- Fixed an issue where iscsi tlv is sent incorrectly to host. (DCBX CEE)
- Fixed an issue where apply bit set for APP id was affecting the ETS and PFC
settings.(DCBX IEEE)
- Fixed an issue where app priority values are not handled correctly in fw.
(DCBX IEEE)
- Fixed an issue where enable/disable dcbx can cause crash. (DCBX CEE,DCBX IEEE)

FOFCoE
- Removed BB6 support.

ENHANCEMENTS
------------

BASE:
- Added new interface to program DCA settings in SGE contexts; allow 32-byte
IQE size
- Added PTP interface fw_ptp_ts to support PTP Frequeny and Offset adjustment.
- Added MPS raw interface.

ETH:
- New mailbox command FW_DCB_IEEE_CMD api added for IEEE dcbx.

OFLD:
- WR opcode is returned to host in cqe error response.

22.2. T4 Firmware
+++++++++++++++++

Version : 1.15.37.0
Date : 04/27/2016
================================================================================

FIXES
-----

BASE:
- Fixed an issue in FW_RSS_VI_CONFIG_CMD handling where default ingress queue
was ignored.
- Fixed an issue in watchdog which was causing VM bring-up failure after reboot.
- Per port buffer groups size doubled to improve performance.
- Fixed an issue where iWARP was crashing in conjunction with traffic management.

FOiSCSI:
- Fixed an issue in recovery path where connection was getting closed before
recovery processing was done.
- Fixed an issue in TCP port reuse.
- Fixed an issue in recovery path when large number (>64) of iSCSI connections
were in use.
- Returned ENETUNREACH if IP had not been provisioned yet and driver tried to
use given inerface.

DCBX
- Fixed an issue where iscsi tlv is sent incorrectly to host.(DCBX CEE)
- Fixed an issue where enable/disable dcbx can cause crash in firmware.(DCBX CEE)

FOiSCSI
- Fixes an issue where fw was sending ENETUNREACH event for normal tcp
disconnection.

FOFCoE
- Removed BB6 support.

ENHANCEMENTS
------------

BASE:
- Added MPS raw interface.

ETH:
- New mailbox command FW_DCB_IEEE_CMD api added for IEEE dcbx.
================================================================================

Sponsored by: Chelsio Communications

MFC r285527 and r286338. This takes the firmware from 1.11.27.0 to 1.14.4.0.

r286338:
cxgbe(4): Update T5 and T4 firmwares bundled with the driver to 1.14.4.0. The
changes in the firmwares since 1.11.27.0 are listed here (straight copy-paste
from the "Release Notes.txt" accompanying the Chelsio Unified Wire 2.11.1.0
release on the website).

22.1. T5 Firmware
+++++++++++++++++++++++++++++++++

Version : 1.14.4.0
Date : 08/05/2015
================================================================================

FIXES
-----

BASE:
- Fixes a potential data path hang by properly programming PMTX congestion
threshold settings.
- Fixes a potential initialization error when accessing a configuration file
stored on the flash.
- Fixes a regression where SGE resources can be miss-sized if iWARP is disabled.

ETH:
- Fixes a timing issue that would prevent CR4 links from coming up with some
switches.

FOFCoE:
- Defers fcoe linkdown mailbox command handling till LOGO is sent.
- Updates vlan prio for all outstanding IOs during dcbx update.

ENHANCEMENTS
------------

BASE:
- Adds support for PAUSE OFF watchdog.
- Reports devlog access information in PCIE_FW_PF register 7.

ETH:
- Enhances segmentation offload to include VxLAN and Geneve.
- Adds PTP support.
- Adds new interface to allow the driver to query the VI rss table base
addresses.
- Allows the driver to program the SGE ingrext contxt CongDrop field.

OFLD:
- Adds new interface for the driver to specify offloaded connections TCP snd
and rcv scale factors.

iSCSI:
- Adds support for iscsi segmentatation offload (ISO).
- Adds support for iscsi t10-dif offload.

FOiSCSI:
- Sets FORCE_BIT for cut through processing for FOiSCSI.

FOFCoE:
- Adds support for FCoE BB6.
- Improves WRITE performance.

================================================================================
================================================================================

Version : 1.13.32.0
Date : 03/25/2015
================================================================================

FIXES
-----

BASE:
- Fixes FW_CAPS_CONFIG_CMD return value on error (was positive instead of
negative)
- Fixes FW_PARAMS_PARAM_DEV_FLOWC_BUFFIFO_SZ indication (was wrong on certain
adapter configurations)
- Fixes config file based PL_TIMEOUT register programming

ETH:
- Fixes a potential EO UDP SEG header corruption
- Fixes an issue where 1000Base-X was not enabled correctly when using QSA
modules

OFLD:
- Fixes timeout issue with half-open connections
- Fixes FW_FLOWC_WR processing when state is set to finwait1

FOFCoE:
- Fixes fcoe xchg leaks in linkdown/peer down path
- Fixes cleanup in FCoE linkdown and fixed buf timer flowid abuse
- Fixes fw crash by clearing fcf flowc during bye

FOiSCSI:
- Don't create a new tcp socket if ERL0 attempt has timed out.

ENHANCEMENTS
------------

BASE:
- Adds support for VFs on PFs 4 to 7
- Adds support for QPs/CQs on any physical and virtual function

ETH:
- Stops sending LACP frames on loopback interface
- Adds an AUTOEQU indication to CPL_SGE_EGR_UPDATE
- Adds support for CR4 links (BEAN/AEC on 40G TwinAx cables)

OFLD:
- Improves default settings of LAN and CLUSTER TCP timer settings
- Sends Negative Advice CPLs to software

FOISCSI:
- Adds IPv6 support for foiscsi. Keeps backward compatibility with
old foiscsi drivers which doesn't support ipv6.

FOFCoE:
- Added fcoe debug support in flowc dump

================================================================================
================================================================================

Version : 1.12.25.0
Date : 10/22/2014
================================================================================

FIXES
-----

BASE:
- Improves precision of the Weight Round Robing Traffic Management Algorithm
- Fixes an issue where the link would intermittently fail to come up
- Fixes an issue where adapters with an external PHY couldn't run at 100Mbps
- Fixes an issue where active optical cables were not recognized
- Fixes link advertising issues on T520-BT (speed and pause frames) that would
cause the link to negotiate unexpected settings
- Forces link restart when auto-negotiation is disabled
- Fix an issue where pause frames wouldn't be fully disabled even if requested

ETH:
- Fixes NVGRE Segmentation Offload network header generation.

DCBX:
- Fixes an issue where some settings were not being sent to the switch
correctly
- Fixes an issue where back-to-back DCBX port updates could get overwritten by
FW
- Fixes a firmware crash on DCBX APP information request before link up

FOiSCSI:
- Fixes abort task leak in tmf response handling
- Fixes TCP RST handling while in iSCSI ERL0
- Fixes a firmware crash on BYE without INIT

ENHANCEMENTS
-------------

BASE:
- Adds link partner settings reporting when available
- Adds QSA support (in conjunction with QSA VPD)
- Adds T520-BT LED support
- Reports NOTSUPPORTED for modules with an unhandled identifier

DCBX:
- Adds version reporting (indicating which version FW is trying to negotiate)
- Adds IEEE support
- Reports LLDP time outs

FOiSCSI:
- Add support for multiple iSCSI DDP client
- Sends DHCP renew request when lease expires

================================================================================

22.2. T4 Firmware
+++++++++++++++++

Version : 1.14.4.0
Date : 08/05/2015
================================================================================

FIXES
-----

BASE:
- Fixes a potential initialization error when accessing a configuration file
stored on the flash.
- Initialize PCIE_DBG_INDIR_REQ.Enable to 0, as hardware failed to do so and
register dumps could result in errors.

ETH:
- Fixes an issue that sometimes prevented the link from coming up in CR adapters.

ENHANCEMENTS
------------

BASE:
- Adds support for PAUSE OFF watchdog.
- Reports devlog access information in PCIE_FW_PF register 7.

ETH:
- Adds new interface to allow the driver to query the VI rss table base
addresses.

OFLD:
- Adds new interface for the driver to specify offloaded connections TCP snd
and rcv scale factors.

================================================================================
================================================================================

Version : 1.13.32.0
Date : 03/25/2015
================================================================================

FIXES
-----

BASE:
- Fixes FW_CAPS_CONFIG_CMD return value on error (was positive instead of
negative)
- Fixes FW_PARAMS_PARAM_DEV_FLOWC_BUFFIFO_SZ indication (was wrong on certain
adapter configurations)
- Fixes config file based PL_TIMEOUT register programming

ETH:
- Fixes a potential EO UDP SEG header corruption

OFLD:
- Fixes timeout issue with half-open connections
- Fixes FW_FLOWC_WR processing when state is set to finwait1

FOiSCSI:
- Don't create a new tcp socket if ERL0 attempt has timed out.

ENHANCEMENTS
------------

ETH:
- Stops sending LACP frames on loopback interface
- Adds an AUTOEQU indication to CPL_SGE_EGR_UPDATE

OFLD:
- Improves default settings of LAN and CLUSTER TCP timer settings
- Sends Negative Advice CPLs to software

================================================================================
================================================================================

Version : 1.12.25.0
Date : 10/22/2014
================================================================================

FIXES
-----

BASE:
- Improves precision of the Weight Round Robing Traffic Management Algorithm
- Forces link restart when auto-negotiation is disabled
- Fix an issue where pause frames wouldn't be fully disabled even if requested

DCBX:
- Fixes an issue where some settings were not being sent to the switch
correctly
- Fixes an issue where back-to-back DCBX port updates could get overwritten by
FW
- Fixes a firmware crash on DCBX APP information request before link up

FOiSCSI:
- Fixes abort task leak in tmf response handling
- Fixes TCP RST handling while in iSCSI ERL0
- Fixes a firmware crash on BYE without INIT

ENHANCEMENTS
------------

BASE:
- Adds link partner settings reporting when available
- Firmware now reports NOTSUPPORTED for modules with an unhandled identifier

DCBX:
- Adds version reporting (indicating which version FW is trying to negotiate)
- Adds IEEE support
- Reports LLDP time outs

FOiSCSI:
- Adds support for multiple iSCSI DDP clients
- Sends DHCP renew request when lease expires

================================================================================

Obtained from: Chelsio Communications
Sponsored by: Chelsio Communications

MFC r276480, r276485, r276498, r277225, r277226, r277227, r277230,
r277637, and r283149 (by emaste@).

r276485 is the real change here, the rest deal with the fallout of
mp_ring's reliance on 64b atomics.

Use the incorrectly spelled 'eigth' from struct pkthdr in this branch
instead of MFC'ing r261733, which would have renamed the field of a
public structure in a -STABLE branch.
---

r276480:
Temporarily unplug cxgbe(4) from !amd64 builds.

r276485:
cxgbe(4): major tx rework.

a) Front load as much work as possible in if_transmit, before any driver
lock or software queue has to get involved.

b) Replace buf_ring with a brand new mp_ring (multiproducer ring). This
is specifically for the tx multiqueue model where one of the if_transmit
producer threads becomes the consumer and other producers carry on as
usual. mp_ring is implemented as standalone code and it should be
possible to use it in any driver with tx multiqueue. It also has:
- the ability to enqueue/dequeue multiple items. This might become
significant if packet batching is ever implemented.
- an abdication mechanism to allow a thread to give up writing tx
descriptors and have another if_transmit thread take over. A thread
that's writing tx descriptors can end up doing so for an unbounded
time period if a) there are other if_transmit threads continuously
feeding the sofware queue, and b) the chip keeps up with whatever the
thread is throwing at it.
- accurate statistics about interesting events even when the stats come
at the expense of additional branches/conditional code.

The NIC txq lock is uncontested on the fast path at this point. I've
left it there for synchronization with the control events (interface
up/down, modload/unload).

c) Add support for "type 1" coalescing work request in the normal NIC tx
path. This work request is optimized for frames with a single item in
the DMA gather list. These are very common when forwarding packets.
Note that netmap tx in cxgbe already uses these "type 1" work requests.

d) Do not request automatic cidx updates every 32 descriptors. Instead,
request updates via bits in individual work requests (still every 32
descriptors approximately). Also, request an automatic final update
when the queue idles after activity. This means NIC tx reclaim is still
performed lazily but it will catch up quickly as soon as the queue
idles. This seems to be the best middle ground and I'll probably do
something similar for netmap tx as well.

e) Implement a faster tx path for WRQs (used by TOE tx and control
queues, _not_ by the normal NIC tx). Allow work requests to be written
directly to the hardware descriptor ring if room is available. I will
convert t4_tom and iw_cxgbe modules to this faster style gradually.

r276498:
cxgbe(4): remove buf_ring specific restriction on the txq size.

r277225:
Make cxgbe(4) buildable with the gcc in base.

r277226:
Allow cxgbe(4) to be built on i386. Driver attach will succeed only on
a subset of i386 systems.

r277227:
Plug cxgbe(4) back into !powerpc && !arm builds, instead of building it
on amd64 only.

r277230:
Build cxgbe(4) on powerpc64 too.

r277637:
Make sure the compiler flag to get cxgbe(4) to compile with gcc is used
only when gcc is being used. This is what r277225 should have been.

MFC r278303:

cxgbe(4): Add a minimal if_cxl module that pulls in the real driver as
a dependency. This ensures "ifconfig cxl<n> ..." does the right thing
even when it's run with no driver loaded.

if_cxl.ko is the tiniest module in /boot/kernel.

MFC r266571, r266757, r268536, r269076, r269364, r269366, r269411,
r269413, r269428, r269440, r269537, r269644, r269731, and the cxgbe
portion of r270063.

r266571:
cxgbe(4): Remove stray if_up from the code that creates the tracing ifnet.

r266757:
cxgbe(4): netmap support for Terminator 5 (T5) based 10G/40G cards.
Netmap gets its own hardware-assisted virtual interface and won't take
over or disrupt the "normal" interface in any way. You can use both
simultaneously.

For kernels with DEV_NETMAP, cxgbe(4) carves out an ncxl<N> interface
(note the 'n' prefix) in the hardware to accompany each cxl<N>
interface. These two ifnet's per port share the same wire but really
are separate interfaces in the hardware and software. Each gets its own
L2 MAC addresses (unicast and multicast), MTU, checksum caps, etc. You
should run netmap on the 'n' interfaces only, that's what they are for.

With this, pkt-gen is able to transmit > 45Mpps out of a single 40G port
of a T580 card. 2 port tx is at ~56Mpps total (28M + 28M) as of now.
Single port receive is at 33Mpps but this is very much a work in
progress. I expect it to be closer to 40Mpps once done. In any case
the current effort can already saturate multiple 10G ports of a T5 card
at the smallest legal packet size. T4 gear is totally untested.

trantor:~# ./pkt-gen -i ncxl0 -f tx -D 00:07:43:ab:cd:ef
881.952141 main [1621] interface is ncxl0
881.952250 extract_ip_range [275] range is 10.0.0.1:0 to 10.0.0.1:0
881.952253 extract_ip_range [275] range is 10.1.0.1:0 to 10.1.0.1:0
881.962540 main [1804] mapped 334980KB at 0x801dff000
Sending on netmap:ncxl0: 4 queues, 1 threads and 1 cpus.
10.0.0.1 -> 10.1.0.1 (00:00:00:00:00:00 -> 00:07:43:ab:cd:ef)
881.962562 main [1882] Sending 512 packets every 0.000000000 s
881.962563 main [1884] Wait 2 secs for phy reset
884.088516 main [1886] Ready...
884.088535 nm_open [457] overriding ifname ncxl0 ringid 0x0 flags 0x1
884.088607 sender_body [996] start
884.093246 sender_body [1064] drop copy
885.090435 main_thread [1418] 45206353 pps (45289533 pkts in 1001840 usec)
886.091600 main_thread [1418] 45322792 pps (45375593 pkts in 1001165 usec)
887.092435 main_thread [1418] 45313992 pps (45351784 pkts in 1000834 usec)
888.094434 main_thread [1418] 45315765 pps (45406397 pkts in 1002000 usec)
889.095434 main_thread [1418] 45333218 pps (45378551 pkts in 1001000 usec)
890.097434 main_thread [1418] 45315247 pps (45405877 pkts in 1002000 usec)
891.099434 main_thread [1418] 45326515 pps (45417168 pkts in 1002000 usec)
892.101434 main_thread [1418] 45333039 pps (45423705 pkts in 1002000 usec)
893.103434 main_thread [1418] 45324105 pps (45414708 pkts in 1001999 usec)
894.105434 main_thread [1418] 45318042 pps (45408723 pkts in 1002001 usec)
895.106434 main_thread [1418] 45332430 pps (45377762 pkts in 1001000 usec)
896.107434 main_thread [1418] 45338072 pps (45383410 pkts in 1001000 usec)
...

r268536:
cxgbe(4): Add an iSCSI softc to the adapter structure.

r269076:
Some hooks in cxgbe(4) for the offloaded iSCSI driver.

r269364:
Improve compliance with style.Makefile(5).

r269366:
List one file per line in the Makefiles. This makes it easier to read
diffs when a file is added or removed.

r269411:
cxgbe(4): minor optimizations in ingress queue processing.

Reorganize struct sge_iq. Make the iq entry size a compile time
constant. While here, eliminate RX_FL_ESIZE and use EQ_ESIZE directly.

r269413:
cxgbe(4): Fix an off by one error when looking for the BAR2 doorbell
address of an egress queue.

r269428:
cxgbe(4): some optimizations in freelist handling.

r269440:
cxgbe(4): Remove an unused version of t4_enable_vi.

r269537:
cxgbe(4): Do not run any sleepable code in the SIOCSIFFLAGS handler when
IFF_PROMISC or IFF_ALLMULTI is being flipped. bpf(4) holds its global
mutex around ifpromisc in at least the bpf_dtor path.

r269644:
cxgbe(4): Let caller specify whether it's ok to sleep in
t4_sched_config and t4_sched_params.

r269731:
cxgbe(4): Do not poke T4-only registers on a T5 (and vice versa).

Relnotes: Yes (native netmap support for Chelsio T4/T5 cards)

MFC r267757:

cxgbe(4): Update the bundled T4 and T5 firmwares to versions 1.11.27.0

Obtained from: Chelsio

MFC r256694, r256713, r256714.

r256694:
iw_cxgbe: iWARP driver for Chelsio T4/T5 chips. This is a straight port
of the iw_cxgb4 found in OFED distributions.

r256713:
iw_cxgbe should have a dependency on t4nex.

r256714:
Fix typo in previous commit.

Approved by: re (hrs)

MFC r256459.

cxgbe(4): Update T4 and T5 firmwares to 1.9.12.0

Approved by: re (glebius)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Add support for packet-sniffing tracers to cxgbe(4). This works with
all T4 and T5 based cards and is useful for analyzing TSO, LRO, TOE, and
for general purpose monitoring without tapping any cxgbe or cxl ifnet
directly.

Tracers on the T4/T5 chips provide access to Ethernet frames exactly as
they were received from or transmitted on the wire. On transmit, a
tracer will capture a frame after TSO segmentation, hw VLAN tag
insertion, hw L3 & L4 checksum insertion, etc. It will also capture
frames generated by the TCP offload engine (TOE traffic is normally
invisible to the kernel). On receive, a tracer will capture a frame
before hw VLAN extraction, runt filtering, other badness filtering,
before the steering/drop/L2-rewrite filters or the TOE have had a go at
it, and of course before sw LRO in the driver.

There are 4 tracers on a chip. A tracer can trace only in one direction
(tx or rx). For now cxgbetool will set up tracers to capture the first
128B of every transmitted or received frame on a given port. This is a
small subset of what the hardware can do. A pseudo ifnet with the same
name as the nexus driver (t4nex0 or t5nex0) will be created for tracing.
The data delivered to this ifnet is an additional copy made inside the
chip. Normal delivery to cxgbe<n> or cxl<n> will be made as usual.

/* watch cxl0, which is the first port hanging off t5nex0. */
# cxgbetool t5nex0 tracer 0 tx0 (watch what cxl0 is transmitting)
# cxgbetool t5nex0 tracer 1 rx0 (watch what cxl0 is receiving)
# cxgbetool t5nex0 tracer list
# tcpdump -i t5nex0 <== all that cxl0 sees and puts on the wire

If you were doing TSO, a tcpdump on cxl0 may have shown you ~64K
"frames" with no L3/L4 checksum but this will show you the frames that
were actually transmitted.

/* all done */
# cxgbetool t5nex0 tracer 0 disable
# cxgbetool t5nex0 tracer 1 disable
# cxgbetool t5nex0 tracer list
# ifconfig t5nex0 destroy

- Include the T5 firmware with the driver.
- Update the T4 firmware to the latest.
- Minor reorganization and updates to the version macros, etc.

Obtained from: Chelsio
MFC after: 1 day

cxgbe(4): Add support for Chelsio's Terminator 5 (aka T5) ASIC. This
includes support for the NIC and TOE features of the 40G, 10G, and
1G/100M cards based on the T5.

The ASIC is mostly backward compatible with the Terminator 4 so cxgbe(4)
has been updated instead of writing a brand new driver. T5 cards will
show up as cxl (short for cxlgb) ports attached to the t5nex bus driver.

Sponsored by: Chelsio

cxgbe(4): Update firmware to 1.8.4.0.

MFC after: 5 days

cxgbe(4): Updates to the hardware L2 table management code.

- Add full support for IPv6 addresses.

- Read the size of the L2 table during attach. Do not assume that PCIe
physical function 4 of the card has all of the table to itself.

- Use FNV instead of Jenkins to hash L3 addresses and drop the private
copy of jhash.h from the driver.

MFC after: 1 week

Update interface to firmware 1.6.2 and include the firmware in the driver.

Obtained from: Chelsio
MFC after: 1 week

Support for TCP DDP (Direct Data Placement) in the T4 TOE module.

Basically, this is automatic rx zero copy when feasible. TCP payload is
DMA'd directly into the userspace buffer described by the uio submitted
in soreceive by an application.

- Works with sockets that are being handled by the TCP offload engine
of a T4 chip (you need t4_tom.ko module loaded after cxgbe, and an
"ifconfig +toe" on the cxgbe interface).
- Does not require any modification to the application.
- Not enabled by default. Use hw.t4nex.<X>.toe.ddp="1" to enable it.

Assume INET, INET6, and TCP_OFFLOAD when the driver is built out of tree and
KERNBUILDDIR is not set.

MFC after: 2 weeks

cxgbe(4): support for IPv6 TSO and LRO.

Submitted by: bz (this is a modified version of that patch)

- Updated TOE support in the kernel.

- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs.
These are available as t3_tom and t4_tom modules that augment cxgb(4)
and cxgbe(4) respectively. The cxgb/cxgbe drivers continue to work as
usual with or without these extra features.

- iWARP driver for Terminator 3 ASIC (kernel verbs). T4 iWARP in the
works and will follow soon.

Build-tested with make universe.

30s overview
============
What interfaces support TCP offload? Look for TOE4 and/or TOE6 in the
capabilities of an interface:
# ifconfig -m | grep TOE

Enable/disable TCP offload on an interface (just like any other ifnet
capability):
# ifconfig cxgbe0 toe
# ifconfig cxgbe0 -toe

Which connections are offloaded? Look for toe4 and/or toe6 in the
output of netstat and sockstat:
# netstat -np tcp | grep toe
# sockstat -46c | grep toe

Reviewed by: bz, gnn
Sponsored by: Chelsio communications.
MFC after: ~3 months (after 9.1, and after ensuring MFC is feasible)

Many updates to cxgbe(4)

- Device configuration via plain text config file. Also able to operate
when not attached to the chip as the master driver.

- Generic "work request" queue that serves as the base for both ctrl and
ofld tx queues.

- Generic interrupt handler routine that can process any event on any
kind of ingress queue (via a dispatch table).

- A couple of new driver ioctls. cxgbetool can now install a firmware
to the card ("loadfw" command) and can read the card's memory
("memdump" and "tcb" commands).

- Lots of assorted information within dev.t4nex.X.misc.* This is
primarily for debugging and won't show up in sysctl -a.

- Code to manage the L2 tables on the chip.

- Updates to cxgbe(4) man page to go with the tunables that have changed.

- Updates to the shared code in common/

- Updates to the driver-firmware interface (now at fw 1.4.16.0)

MFC after: 1 month

Fix make buildworld -DMODULES_WITH_WORLD
Sort opt_ srcs

L2 table code. This is enough to get the T4's switch + L2 rewrite
filters working. (All other filters - switch without L2 info rewrite,
steer, and drop - were already fully-functional).

Some contrived examples of "switch" filters with L2 rewriting:

# cxgbetool t4nex0 iport 0 dport 80 action switch vlan +9 eport 3
Intercept all packets received on physical port 0 with TCP port 80 as
destination, insert a vlan tag with VID 9, and send them out of port 3.

# cxgbetool t4nex0 sip 192.168.1.1/32 ivlan 5 action switch \
vlan =9 smac aa:bb:cc:dd:ee:ff eport 0
Intercept all packets (received on any port) with source IP address
192.168.1.1 and VLAN id 5, rewrite the VLAN id to 9, rewrite source mac
to aa:bb:cc:dd:ee:ff, and send it out of port 0.

MFC after: 1 week

T4 packet timestamps.

Reference code that shows how to get a packet's timestamp out of
cxgbe(4). Disabled by default because we don't have a standard way
today to pass this information up the stack.

The timestamp is 60 bits wide and each increment represents 1 tick of
the T4's core clock. As an example, the timestamp granularity is ~4.4ns
for this card:

# sysctl dev.t4nex.0.core_clock
dev.t4nex.0.core_clock: 228125

MFC after: 1 week

Allow multiple modules within sys/modules/cxgbe. The first one is if_cxgbe.

MFC after: 3 days

cxgbe(4) - NIC driver for Chelsio T4 (Terminator 4) based 10Gb/1Gb adapters.

MFC after: 3 weeks