Major update to the 'twe' driver.

 - Layout reorganisation to enhance portability.  The driver now has
   a relatively MI 'core' and a FreeBSD-specific layer over the top.
   Since the NetBSD people have already done their own port, this is
   largely just to help me with the BSD/OS port.

 - Request ID allocation changed to improve performance (I'd been
   considering switching to this approach after having failed to come
   up with a better way to dynamically allocate request IDs, and seeing
   Andy Doran use it in the NetBSD port of the driver convinced me
   that I was wasting my time doing it any other way).  Now we just
   allocate all the requests up front.

 - Maximum request count bumped back to 255 after characterisation
   of a firmware issue (off-by-one causing it to crash with 256
   outstanding commands).

 - Control interface implemented.  This allows 3ware's '3dm' utility to
   talk to the controller.  3dm will be available from 3ware shortly.

 - Controller soft-reset feature added; if the controller signals a
   firmware or protocol error, the controller will be reset and all
   outstanding commands will be retried.

1 files changed, 92 insertions, 0 deletions

diff --git a/sys/dev/twe/tweio.h b/sys/dev/twe/tweio.h
new file mode 100644
index 0000000..eaf0d7b
--- /dev/null
+++ b/sys/dev/twe/tweio.h
@@ -0,0 +1,92 @@
+/*-
+ * Copyright (c) 2000 Michael Smith
+ * Copyright (c) 2000 BSDi
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$FreeBSD$
+ */
+
+
+/*
+ * User-space command
+ *
+ * Note that the command's scatter/gather list will be computed by the
+ * driver, and cannot be filled in by the consumer.
+ */
+struct twe_usercommand {
+    TWE_Command	tu_command;	/* command ready for the controller */
+    void	*tu_data;	/* pointer to data in userspace */
+    size_t	tu_size;	/* userspace data length */
+};
+
+#define TWEIO_COMMAND		_IOWR('T', 100, struct twe_usercommand)
+
+/*
+ * Command queue statistics
+ */
+#define TWEQ_FREE	0
+#define TWEQ_BIO	1
+#define TWEQ_READY	2
+#define TWEQ_BUSY	3
+#define TWEQ_COMPLETE	4
+#define TWEQ_COUNT	5	/* total number of queues */
+
+struct twe_qstat {
+    u_int32_t	q_length;
+    u_int32_t	q_max;
+};
+
+/*
+ * Statistics request
+ */
+union twe_statrequest {
+    u_int32_t		ts_item;
+    struct twe_qstat	ts_qstat;
+};
+
+#define TWEIO_STATS		_IOWR('T', 101, union twe_statrequest)
+
+/*
+ * AEN listen
+ */
+#define TWEIO_AEN_POLL		_IOR('T', 102, int)
+#define TWEIO_AEN_WAIT		_IOR('T', 103, int)
+
+/*
+ * Controller parameter access
+ */
+struct twe_paramcommand {
+    u_int16_t	tp_table_id;
+    u_int8_t	tp_param_id;
+    void	*tp_data;
+    u_int8_t	tp_size;
+};
+
+#define TWEIO_SET_PARAM		_IOW ('T', 104, struct twe_paramcommand)
+#define TWEIO_GET_PARAM		_IOW ('T', 105, struct twe_paramcommand)
+
+/*
+ * Request a controller soft-reset
+ */
+#define TWEIO_RESET		_IO  ('T', 106)