There is no need to test __FreeBSD_version for features that have
been around for a long time now (7.1-ish or even earlier); assume
they are present. These includes MSI, TSO, LRO, VLAN, INTR_FILTERS

There is no need to test __FreeBSD_version for features that have
been around for a long time now (7.1-ish or even earlier); assume
they are present. These includes MSI, TSO, LRO, VLAN, INTR_FILTERS,
FIRMWARE, etc.

Also, eliminate some dead code and clean up in other places as part
of this quick once-over.

MFC after: 1 week

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MFC r202863

Don't forget to release the adapter lock for a no-op.

Don't forget to release the adapter lock for a no-op.

MFC r201907,202671,202678

r201907:
Extra parantheses to keep certain compilers happy.

r202671:
Fix for a cxgb(4) panic. cxgb_ioctl can be called by the IP and IPv6
layers with non-sleepable locks

MFC r201907,202671,202678

r201907:
Extra parantheses to keep certain compilers happy.

r202671:
Fix for a cxgb(4) panic. cxgb_ioctl can be called by the IP and IPv6
layers with non-sleepable locks held. Don't (potentially) sleep in
those situations.

r202678:
Complain if freelist queue sizes are significantly less than desired.

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Fix for a cxgb(4) panic. cxgb_ioctl can be called by the IP and IPv6
layers with non-sleepable locks held. Don't (potentially) sleep in
those situations.

Merge from head at r201628.

# This hasn't been tested, and there are at least three bad commits
# that need to be backed out before the branch will be stable again.

MFC r199237:

sc->rev and is_offload(sc) will always be 0 during probe. Wait till
attach to get correct values.

(missed this one in r200175)

MFC r199237, r199238, r199239, r199240, r200003

r199237:
sc->rev and is_offload(sc) will always be 0 during probe. Wait till
attach to get correct values.

r199238:
Make sure *some* edc is setup ev

MFC r199237, r199238, r199239, r199240, r200003

r199237:
sc->rev and is_offload(sc) will always be 0 during probe. Wait till
attach to get correct values.

r199238:
Make sure *some* edc is setup even for an unknown transceiver (assume
it is optical).

r199239:
The 10GBASE-T card should use an IPG of 1. Also enable the check
for low power startup on this card.

r199240:
Don't disable the XGMAC's tx on ifconfig down. It is unnecessary
and can cause false backpressure in the chip. Fix a us/ms mixup
while here.

r200003:
T3 firmware 7.8.0 for cxgb(4)

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Don't disable the XGMAC's tx on ifconfig down. It is unnecessary
and can cause false backpressure in the chip. Fix a us/ms mixup
while here.

sc->rev and is_offload(sc) will always be 0 during probe. Wait till
attach to get correct values.

MFC @199204

MFC r197791

cxgb(4) updates, including:
- support for the new Gen-2, BT, and LP-CR cards.
- T3 firmware 7.7.0
- shared "common code" updates.

Take a step towards removing if_watchdog/if_timer. Don't explicitly set
if_watchdog/if_timer to NULL/0 when initializing an ifnet. if_alloc()
sets those members to NULL/0 already.

MFC 196840:
Fill the reverse RSS map with 0xff's so that the subsequent loop to
calculate the values will work properly.

cxgb(4) updates, including:
- support for the new Gen-2, BT, and LP-CR cards.
- T3 firmware 7.7.0
- shared "common code" updates.

Approved by: gnn (mentor)
Obtained from: Chelsio
MFC after: 1 month

Merge from head

Merge from head up to r188941 (last revision before the USB stack switch)

- MFC from head@196987

Fill the reverse RSS map with 0xff's so that the subsequent loop to
calculate the values will work properly.

Reviewed by: np
MFC after: 1 month

- MFC

Various ifmedia related fixes in cxgb(4), including:

- build ifmedia list based on phy->caps, not string comparisons.
- rebuild media list when a transceiver change is detected.
- return EOPNOTSUPP

Various ifmedia related fixes in cxgb(4), including:

- build ifmedia list based on phy->caps, not string comparisons.
- rebuild media list when a transceiver change is detected.
- return EOPNOTSUPP instead of ENXIO in cxgb_media_status.

Approved by: gnn (mentor)
MFC after: 2 weeks.

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Fix cxgb's ifmedia ioctl handling. Also fixed a comment.

Reviewed by: kmacy
Approved by: gnn (mentor)

Greatly simplify cxgb by removing almost all of the custom mbuf management logic

- remove mbuf iovec - useful, but adds too much complexity when isolated to
the driver

- remove driver private ca

Greatly simplify cxgb by removing almost all of the custom mbuf management logic

- remove mbuf iovec - useful, but adds too much complexity when isolated to
the driver

- remove driver private caching - insufficient benefit over UMA to justify
the added complexity and maintenance overhead

- remove separate logic for managing multiple transmit queues, with the
new drbr routines the control flow can be made to much more closely resemble
legacy drivers

- remove dedicated service threads, with per-cpu callouts one can get the same
benefit much more simply by registering a callout 1 tick in the future if there
are still buffered packets

- remove embedded mbuf usage - Jeffr's changes will (I hope) soon be integrated
greatly reducing the overhead of using kernel APIs for reference counting
clusters

- add hysteresis to descriptor coalescing logic

- add coalesce threshold sysctls to allow users to decide at run-time
between optimizing for forwarding / UDP or optimizing for TCP

- add once per second watchdog to effectively close the very rare races
occurring from coalescing

- incorporate Navdeep's changes to the initialization path required to
convert port and adapter locks back to ordinary mutexes (silencing BPF
LOR complaints)

- enable prefetches in get_packet and tx cleaning

Reviewed by: navdeep@
MFC after: 2 weeks

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- Merge from HEAD

Re-add the send queue tunable for people who do not use buffering.

Reviewed by: jhb
MFC after: 3 days