MFC r341297

sfxge(4): fix out of bounds read when dereferencing sdup

Introduce and use macro to make sure that MCDI buffers allocated
on stack are rounded up properly.

Submitted by: Gautam Dawar <gdawar at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/D18259

MFC r340889

sfxge(4): fix warnings from VS2015 C compiler (C4189)

Fix multiple level 4 warnings
"C4189: 'xxx': local variable is initialized but not referenced";
no functional changes.

Submitted by: Andrew Lee <alee at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/D18123

MFC r340800

sfxge(4): let caller know that queue is already flushed

Tx/Rx queue may be already flushed due to Tx/Rx error on the queue or
MC reboot. Caller needs to know that the queue is already flushed to
avoid waiting for flush done event.

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/D18070

MFC r310812

sfxge(4): support non-interrupting event queues creation

Poll-mode driver does not use interrupts and number of used event queues
should not be limitted by the number of interrupts allocated for the
NIC.

Sponsored by: Solarflare Communications, Inc.

MFC r310713

sfxge(4): add possibility to control event queue performance profile

It is ignored on SFN5xxx/6xxx (aka Siena).

Sponsored by: Solarflare Communications, Inc.

MFC r310693

sfxge(4): cleanup: avoid unspecified unsigned

Found by DPDK checkpatch.sh

Sponsored by: Solarflare Communications, Inc.

MFC r310682

sfxge(4): cleanup: avoid C99 // comments

Found by DPDK checkpatch.sh

Sponsored by: Solarflare Communications, Inc.

MFC r301427

sfxge(4): allow firmware to auto-configure event queues on Medford

On Medford, licenses are required to enable RX and event cut through and to
disable RX batching. To avoid the need for the driver to make decisions based on
the licensing state, the MC_CMD_INIT_EVQ has been extended to allow us to leave
the decision to the firmware. If the adapter is licensed for low-latency use,
the firmware will choose the optimal settings for latency, otherwise it will use
the best settings for throughput.

For Huntington we still need to choose the settings ourselves.

Submitted by: Mark Spender <mspender at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/D6717

MFC r301308

sfxge(4): add helper to compute timer quantum

This also adjusts the timer values used to match the Linux net
driver implementation:
a) non-zero time intervals should result in at least one quantum
b) timer load/reload values are only zero biased for Falcon/Siena

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/D6704

MFC r301237

sfxge(4): support EVQ timer workaround via MCDI

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/6675

MFC r301122

sfxge(4): set moderation in efx_ev_qcreate

This simplifies setting an initial interrupt moderation value, and
avoids most calls to evx_ev_qmoderate from contexts where MCDI is
not allowed (MCDI is need for an EVQ timer workaround in a later patch).

Submitted by: Andy Moreton <amoreton at solarflare.com>
Reviewed by: gnn
Sponsored by: Solarflare Communications, Inc.
Differential Revision: https://reviews.freebsd.org/D6673

MFC r300607

sfxge(4): cleanup: update copyright to 2016

Sponsored by: Solarflare Communications, Inc.

MFC r300605

sfxge(4): be ready to receive events immediately after event queues are created

Submitted by: Mark Spender <mspender at solarflare.com>
Reviewed by: gnn
Sponsored by: Solarflare Communications, Inc.

MFC r299925

sfxge(4): cleanup: quieten more common code MCDI handlers

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.

MFC r299920

sfxge(4): cleanup: simplify ef10_ev_qcreate

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.

MFC r299915

sfxge(4): improve TX/RX queue error messages

Report the full error descriptor in a form that can be passed to
firmwaresrc/dpcpu/scripts/evdecode

Submitted by: Mark Spender <mspender at solarflare.com>
Sponsored by: Solarflare Communications, Inc.

MFC r299596-r299606, r299681, r299726, r299738

sfxge(4): move ef10_*() functions to ef10_*.c files

Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.