- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

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

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

Remove unnecessary #include's.

Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags in sys/dev.

Switch to our preferred 2-clause BSD license.

Approved by: kmacy

mvec routines should have no knowledge of the SG engine.

Reviewed by: kmacy
Approved by: gnn (mentor)

fix !x86 cxgb compile

- fix dma map handling for !x86 case
- fix allocation failure handing in refill_fl

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

The pkthdr field is flowid not rss_hash

- fix multiqueue conditional
- don't leak mbuf tags in the non-conditional case

Found by: Navdeep Parhar

integrate use after free fixes from private branch

Found by: kkenn@

null out m_next when marshalling a packet

fix insta-panic:
- determine which ext_arg offsets to use based on the version number

Submitted by: Chelsio Inc.
MFC after: 1 day

Update cxgb include paths to not require prefixing with dev/cxgb

Submitted by: Chelsio Inc.

- update firmware to 5.0
- add support for T3C
- add DDP support (zero-copy receive)
- fix TOE transmit of large requests
- fix shutdown so that sockets don't remain in CLOSING state indefinitely
- register listeners when an interface is brought up after tom is loaded
- fix setting of multicast filter
- enable link at device attach
- exit tick handler if shutdown is in progress
- add helper for logging TCB
- add sysctls for dumping transmit queues

- note that TOE wxill not be MFC'd until after 7.0 has been finalized

MFC after: 3 days

remove superfluous debug printfs

Fix mbuf leak caused by freeing packet zone clusters but not their associated mbufs

- Track packet zone mbufs separately from other mbufs
- free packet zone buffers via m_free rather than trying to manage the refcount
as with clusters - its refcount and management seems to be "special"

Use '%zd' to print PIO_LEN since it involves a size_t (via sizeof()) to
appease the tinderbox on 32-bit platforms.

Tested on: amd64, i386

- Simplify mb_free_ext_fast
- increase asserts for mbuf accounting
- track outstanding mbufs (maps very closely to leaked)
- actually only create one thread per port if !multiq
Oddly enough this fixes the use after free

- move txq_segs to stack in t3_encap
- add checks that pidx doesn't move pass cidx
- simplify mbuf free logic in collapse mbufs routine

- move WR_LEN in to cxgb_adapter.h add PIO_LEN to make intent clearer
- move cxgb_tx_common in to cxgb_multiq.c and rename to cxgb_tx
- move cxgb_tx_common dependencies
- further simplify cxgb_dequeue_packet for the non-multiqueue case
- only launch one service thread per port in the non-multiq case
- remove dead cleaning code from cxgb_sge.c
- simplify PIO case substantially in by returning directly from mbuf collapse
and just using m_copydata
- remove gratuitous m_gethdr in the rx path
- clarify freeing of mbufs in collapse

remove unused code

should always free when refcount is 1

don't decrement ref count below 1 for EXT_PACKET

Fix mvec code to handle the case of the packet zone
this was missed in the initial import

Update the buffer management support code needed by the tcp offload module

When building cxgb as a module make include paths relative to the driver's root.
This will make it possible to build the module out of tree against an older src tree.

MFC after: 3 days

update license headers

Eliminate CID 1842 by comparing against (type != EXT_MBUF) => refcnt != NULL

Fix memory leak in m_collapse (CID 1843)

Found by: Coverity
Submitted by: jhb

PHYS_TO_VM_PAGE requires explicit vm_page.h include on sparc64

Use %j and args cast to uintmax_t to print bus_addr_t && length args.

Add pmap includes needed by i386

suck in more of busdma to enable more efficient mappings
kill redundant INVARIANTS check

Implement ZERO_COPY_SOCKETS check in a way that doesn't make LINT unhappy

add reference count pointer to mbuf iovec
implement robust version of m_collapse
add support for sf_buf
add fix for m_iovappend
add calls to m_sanity under INVARIANTS
fix m_freem_vec to correctly travese the mbuf iovec chain

throw sun4v into the check while we're at it

busdma tags are opaque on all architectures except sparc64
for now simply don't compile/use on sparc64

add busdma function for mapping mbuf iovecs
change m_collapse to return an error code

Add driver private mbuf iovec support routines