fix spelling mistakes, mainly in comments and log messages.

Split device_t/softc of i82586. No crash on TME emulating sun2.

branches: 1.22.22; 1.22.28; 1.22.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.21.70; 1.21.72; 1.21.74;
merge ktrace-lwp.

- add missing const
- fix variable shadowing
- remove unneeded casts

de-__P

branches: 1.18.8; 1.18.10;
Fix some typos. From Tom Cosgrove via jmc@openbsd.

function prototype must not have variable name

branches: 1.16.22;
add 'why' argument to the channel attention hook function; this argument
is similar to the one passed to hwreset hook function

branches: 1.15.2;
Patch from PR kern/8001, submitted by Rafal Boni.

This adds support for EtherExpress/16 cards with 16k of RAM, and in the
process adds general support for PIO mode on these cards. This entails
changing the way the i82586 driver handles bus barriers, since it doesn't
allow for strange cases like this.

This has been tested on the i386 port with the 'ix' driver in both
16KB (which was the source of the problem) and 32KB modes, as well
as with the 'ef' driver. I've tested it (briefly) with 'ei' on arm26
as well. In theory, drivers other than 'ix' should follow precisely the
same code paths as before.

Fixes from PR 9838:
Only access board memory using the front-end functions.
Add hook for clearing latched interrupts.
Corrent debugging printf of ethertype on LE systems.
Make it possible to us I82586_DEBUG as a kernel option.

Tested on arm26 and mvme68k.

Conform bus_dmamem_{alloc,map} usage to bus_dma(9) specs.

branches: 1.12.2;
Disable inclusion of debugging code by default.
Turn compile-time flag I82586_DEBUG into a boolean switch.

Use ETHER_*_LEN constants from <net/if_ether.h> instead of defining them
ourselves.

Assign my copyrights to TNF.

Make copyright notices with my name consistent.

Move "async command" state in here.

* Fix a train-load of bugs, mostly present in one of these categories:
- "out of resource" errors cause receive buffer chain corruption
- resets can confuse the interrupt handler
- multi-cast setup causes receive buffer chain corruption
- shared memory setup incomplete

* Enhance effiency by avoiding unnecessary shared memory access,
improved handling of receive frame & buffer descriptors, and
introducing an `asynchronous' option when issuing 82586 commands.

* Exclusively use offsets relative to the bus handle representing the shared
memory area to formulate accesses to the chip's data-structures. The
front-ends provide glue functions that cater to the chip's endian-
sensitivity, to perform the actual device access (note: single-byte
accesses are done here using `bus_space_{read,write}_1()').
This concludes the transformation into a bus-independent driver module.

RCSID Police.

Changes from Rafal Boni to accommodate ISA driver front-ends.

Add `nop' commands to chain with the `xmit's.

branches: 1.3.2;
Some more cleanup and synchronization with ISA version.
Also make a start at using bus_* macros (just bus_barrier() for now).

Bring over assorted changes applied to the ISA ie driver over time.
Fix some inaccuracies in the ring-scan code.

First cut at a MI i82586 chip driver.