Date: Wed, 30 May 2001 16:32:30 -0500 (CDT) From: Chris Dillon <cdillon@wolves.k12.mo.us> To: Mike Smith <msmith@FreeBSD.ORG> Cc: Tom Samplonius <tom@sdf.com>, Clemens Hermann <haribeau@gmx.de>, Michael Aronsen <mar@netcentralen.dk>, "'freebsd-scsi@freebsd.org'" <freebsd-scsi@FreeBSD.ORG> Subject: Re: Mylex controllers? Message-ID: <Pine.BSF.4.32.0105301610490.7611-100000@mail.wolves.k12.mo.us> In-Reply-To: <200105301948.f4UJm9R01172@mass.dis.org>
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On Wed, 30 May 2001, Mike Smith wrote:
> The controller isn't the problem, it's CAM. You could try this patch:
[...SNIP...]
> which will hide the physical channels from CAM. This means that non-disk
> peripherals on the controller SCSI busses won't work, which will get me
> another set of whining complaints from different people. 8(
As a followup to my last message, and in the spirit of "less talk,
more patches", here is a patch to turn Mike's original fix into a
sysctl tunable, I think.
I made sure GENERIC would compile after this, but I have _not_
actually tested it. I ripped how to do the sysctl tunable thing
straight out of sys/dev/ata/ata-all.c and ata-disk.c without really
knowing what I'm doing, but it looks OK to someone who has never done
anything with sysctls before (it compiles, did I mention that?). :-)
--- mly.c.orig Wed May 30 16:21:00 2001
+++ mly.c Wed May 30 16:25:31 2001
@@ -36,6 +36,7 @@
#include <sys/ctype.h>
#include <sys/ioccom.h>
#include <sys/stat.h>
+#include <sys/sysctl.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
@@ -89,6 +90,8 @@
static d_ioctl_t mly_user_ioctl;
static int mly_user_command(struct mly_softc *sc, struct mly_user_command *uc);
static int mly_user_health(struct mly_softc *sc, struct mly_user_health *uh);
+
+SYSCTL_NODE(_hw, OID_AUTO, mly, CTLFLAG_RD, 0, "mly driver parameters");
#define MLY_CDEV_MAJOR 158
--- mly_cam.c.orig Wed May 30 15:30:49 2001
+++ mly_cam.c Wed May 30 16:08:50 2001
@@ -32,8 +32,10 @@
#include <sys/param.h>
#include <sys/systm.h>
+#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/devicestat.h>
+#include <sys/sysctl.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
@@ -56,6 +58,13 @@
static void mly_cam_complete(struct mly_command *mc);
static struct cam_periph *mly_find_periph(struct mly_softc *sc, int bus, int target);
+static int mly_cam_nophyschans;
+TUNABLE_INT_DECL("hw.mly.cam_nophyschans", 1, mly_cam_nophyschans);
+
+SYSCTL_DECL(_hw_mly);
+SYSCTL_INT(_hw_mly, OID_AUTO, mly_cam_nophyschans, CTLFLAG_RD, &mly_cam_nophyschans, 0,
+ "Do not report physical channels to CAM");
+
/********************************************************************************
* CAM-specific queue primitives
*/
@@ -131,6 +140,10 @@
/* initialise the CCB queue */
mly_initq_ccb(sc);
+
+ if (mly_cam_nophyschans) {
+ sc->mly_controllerinfo->physical_channels_present = 0;
+ }
/*
* Allocate a devq for all our channels combined.
-- Chris Dillon - cdillon@wolves.k12.mo.us - cdillon@inter-linc.net
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