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 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 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 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 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)