Convert the midway driver to use busdma. Except for this conversion the

following changes have been done:

- stylify. The original code was too hard to read.
- get rid of a number of compilation options (Adaptec-only, Eni-only, no-DMA).
- more debugging features.
- locking. This is not correct yet in the absence of interface layer locking,
  but is correct enough to not to cause lock order reversals.
- remove RAW mode. There are no users of this in the tree and I doubt that
  there are any.
- remove NetBSD compatibility code. There was no way to keep NetBSD non-busdma
  and FreeBSD busdma code together.
- if_en now buildable as a module.

This has been actively tested on sparc64 and i386 with ENI server and
client cards and an Adaptec card (thanks to kjc).

Reviewed by:	mdodd, arr

2 files changed, 21 insertions, 0 deletions

diff --git a/sys/modules/Makefile b/sys/modules/Makefile
index 12133a4..59a0cdf 100644
--- a/sys/modules/Makefile
+++ b/sys/modules/Makefile
@@ -30,6 +30,7 @@ SUBDIR=	accf_data \
 	de \
 	digi \
 	dummynet \
+	en \
 	fdc \
 	fdescfs \
 	firewire \
diff --git a/sys/modules/en/Makefile b/sys/modules/en/Makefile
new file mode 100644
index 0000000..dfd1956
--- /dev/null
+++ b/sys/modules/en/Makefile
@@ -0,0 +1,20 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/../../pci ${.CURDIR}/../../dev/en
+
+KMOD=	if_en
+SRCS=	if_en_pci.c midway.c device_if.h bus_if.h pci_if.h
+SRCS+=	opt_inet.h opt_natm.h opt_ddb.h
+CFLAGS+= -DENABLE_BPF
+# CFLAGS+= -DINVARIANTS -DEN_DEBUG=0
+
+opt_inet.h:
+	echo "#define INET 1" > ${.TARGET}
+
+opt_natm.h:
+	echo "#define NATM 1" > ${.TARGET}
+
+# opt_ddb.h:
+# 	echo "#define DDB 1" > ${.TARGET}
+
+.include <bsd.kmod.mk>