Spring MegaChange #1.

----

Make a device for each ISP- really usable only with devfs and add an ioctl
entry point (this can be used to (re)set debug levels, reset the HBA,
rescan the fabric, issue lips, etc).

----

Add in a kernel thread for Fibre Channel cards. The purpose of this
thread is to be woken up to clean up after Fibre Channel events
block things.  Basically, any FC event that casts doubt on the
location or identify of FC devices blocks the queues. When, and
if, we get the PORT DATABASE CHANGED or NAME SERVER DATABASE CHANGED
async event, we activate the kthread which will then, in full thread
context, re-evaluate the local loop and/or the fabric. When it's
satisfied that things are stable, it can then release the blocked
queues and let commands flow again.

The prior mechanism was a lazy evaluation. That is, the next command
to come down the pipe after change events would pay the full price
for re-evaluation. And if this was done off of a softcall, it really
could hang up the system.

These changes brings the FreeBSD port more in line with the Solaris,
Linux and NetBSD ports. It also, more importantly, gets us being
more proactive about topology changes which could then be reflected
upwards to CAM so that the periph driver can be informed sooner
rather than later when things arrive or depart.

---

Add in the (correct) usage of locking macros- we now have lock transition
macros which allow us to transition from holding the CAM lock (Giant)
and grabbing the softc lock and vice versa. Switch over to having this
HBA do real locking. Some folks claim this won't be a win. They're right.
But you have to start somewhere, and this will begin to teach us how
to DTRT for HBAs, etc.

--

Start putting in prototype 2300 support.  Add back in LIP
and Loop Reset as async events that each platform will handle.
Add in another int_bogus instrumentation point.

Do some more substantial target mode cleanups.

MFC after:	8 weeks

1 files changed, 76 insertions, 0 deletions

diff --git a/sys/dev/isp/isp_ioctl.h b/sys/dev/isp/isp_ioctl.h
new file mode 100644
index 0000000..5ed8a91
--- /dev/null
+++ b/sys/dev/isp/isp_ioctl.h
@@ -0,0 +1,76 @@
+/* $FreeBSD$ */
+/*
+ * Copyright (c) 2001 by Matthew Jacob
+ *
+ * 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.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * the GNU Public License ("GPL", Library, Version 2).
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 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.
+ *
+ * Matthew Jacob <mjacob@feral.com)
+ *
+ */
+/*
+ * ioctl definitions for Qlogic FC/SCSI HBA driver
+ */
+#define	ISP_IOC		(021)	/* 'Ctrl-Q' */
+
+/*
+ * This ioctl sets/retrieves the debugging level for this hba instance.
+ * Note that this is not a simple integer level- see ispvar.h for definitions.
+ *
+ * The arguments is a pointer to an integer with the new debugging level.
+ * The old value is written into this argument.
+ */
+
+#define	ISP_SDBLEV	_IOWR(ISP_IOC, 0, int)
+
+/*
+ * This ioctl resets the HBA. Use with caution.
+ */
+#define	ISP_RESETHBA	_IO(ISP_IOC, 1)
+
+/*
+ * This ioctl performs a fibre chanel rescan.
+ */
+#define	ISP_FC_RESCAN	_IO(ISP_IOC, 2)
+
+/*
+ * Initiate a LIP
+ */
+#define	ISP_FC_LIP	_IO(ISP_IOC, 3)
+
+/*
+ * Return the Port Database structure for the named device, or ENODEV if none.
+ * Caller fills in virtual loopid (0..255), aka 'target'. The driver returns
+ * ENODEV (if nothing valid there) or the actual loopid (for local loop devices
+ * only), 24 bit Port ID and Node and Port WWNs.
+ */
+struct isp_fc_device {
+	u_int32_t	loopid;	/* 0..255 */
+	u_int32_t	portid;	/* 24 bit Port ID */
+	u_int64_t	node_wwn;
+	u_int64_t	port_wwn;
+};
+
+#define	ISP_FC_GETDINFO	_IOWR(ISP_IOC, 4, struct isp_fc_device)