Properly support the 3ware generic API.

- Build SGL's for ATA_PASSTHROUGH commands
- Fallback to using the sgl_offset when the opcode is unknown for building
  SGL's/
- Add ioctl calls for adding and removing units.
- Define previously undefined AEN's
- Allocate memory for the ioctl payload in multiples of 512bytes.

MFC after:      1 week

1 files changed, 3 insertions, 0 deletions

diff --git a/sys/dev/twe/twe_tables.h b/sys/dev/twe/twe_tables.h
index 116a8da..4c0d719 100644
--- a/sys/dev/twe/twe_tables.h
+++ b/sys/dev/twe/twe_tables.h
@@ -143,6 +143,9 @@ struct twe_code_lookup twe_table_aen[] = {
     {"c verify complete",		0x2b},
     {"p overwrote bad sector during rebuild",	0x2c},
     {"p encountered bad sector during rebuild",	0x2d},
+    {"a replacement drive too small", 0x2e},
+    {"c array not previously initialized", 0x2f},
+    {"p drive not supported", 0x30},
     {"a aen queue full",		0xff},
     {NULL, 0},
     {"x unknown AEN",		0}