Module Name: src
Committed By: knakahara
Date: Thu Apr 13 10:37:36 UTC 2017
Modified Files:
src/share/man/man4: wm.4
src/sys/dev/pci: files.pci if_wm.c
Log Message:
wm(4) can disable msi/msix by build option and ddb command.
suggested by [email protected].
reviewed by [email protected] and [email protected].
To generate a diff of this commit:
cvs rdiff -u -r1.35 -r1.36 src/share/man/man4/wm.4
cvs rdiff -u -r1.387 -r1.388 src/sys/dev/pci/files.pci
cvs rdiff -u -r1.507 -r1.508 src/sys/dev/pci/if_wm.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/share/man/man4/wm.4
diff -u src/share/man/man4/wm.4:1.35 src/share/man/man4/wm.4:1.36
--- src/share/man/man4/wm.4:1.35 Wed Mar 22 09:38:10 2017
+++ src/share/man/man4/wm.4 Thu Apr 13 10:37:36 2017
@@ -1,4 +1,4 @@
-.\" $NetBSD: wm.4,v 1.35 2017/03/22 09:38:10 wiz Exp $
+.\" $NetBSD: wm.4,v 1.36 2017/04/13 10:37:36 knakahara Exp $
.\"
.\" Copyright 2002, 2003 Wasabi Systems, Inc.
.\" All rights reserved.
@@ -196,6 +196,12 @@ Enable many event counters such as each
counter.
Caution: If this flag is enabled, the number of evcnt entries increase
very much.
+.It Dv WM_DISABLE_MSI
+If this option is set non-zero value, this driver does not use msi.
+The default value is 0.
+.It Dv WM_DISABLE_MSIX
+If this option is set non-zero value, this driver does not use msix.
+The default value is 0.
.El
.Pp
Setting
Index: src/sys/dev/pci/files.pci
diff -u src/sys/dev/pci/files.pci:1.387 src/sys/dev/pci/files.pci:1.388
--- src/sys/dev/pci/files.pci:1.387 Wed Mar 22 03:32:09 2017
+++ src/sys/dev/pci/files.pci Thu Apr 13 10:37:36 2017
@@ -1,4 +1,4 @@
-# $NetBSD: files.pci,v 1.387 2017/03/22 03:32:09 knakahara Exp $
+# $NetBSD: files.pci,v 1.388 2017/04/13 10:37:36 knakahara Exp $
#
# Config file and device description for machine-independent PCI code.
# Included by ports that need it. Requires that the SCSI files be
@@ -693,6 +693,8 @@ file dev/pci/if_wm.c wm
defflag opt_if_wm.h WM_EVENT_COUNTERS
defparam opt_if_wm.h WM_RX_PROCESS_LIMIT_DEFAULT
WM_RX_INTR_PROCESS_LIMIT_DEFAULT
+ WM_DISABLE_MSI
+ WM_DISABLE_MSIX
# Broadcom 570x Gigabit Ethernet
device bge: ether, ifnet, arp, mii, mii_bitbang
Index: src/sys/dev/pci/if_wm.c
diff -u src/sys/dev/pci/if_wm.c:1.507 src/sys/dev/pci/if_wm.c:1.508
--- src/sys/dev/pci/if_wm.c:1.507 Wed Apr 12 05:08:00 2017
+++ src/sys/dev/pci/if_wm.c Thu Apr 13 10:37:36 2017
@@ -1,4 +1,4 @@
-/* $NetBSD: if_wm.c,v 1.507 2017/04/12 05:08:00 knakahara Exp $ */
+/* $NetBSD: if_wm.c,v 1.508 2017/04/13 10:37:36 knakahara Exp $ */
/*
* Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -84,7 +84,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.507 2017/04/12 05:08:00 knakahara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.508 2017/04/13 10:37:36 knakahara Exp $");
#ifdef _KERNEL_OPT
#include "opt_net_mpsafe.h"
@@ -173,6 +173,16 @@ int wm_debug = WM_DEBUG_TX | WM_DEBUG_RX
#define WM_MAX_NQUEUEINTR 16
#define WM_MAX_NINTR (WM_MAX_NQUEUEINTR + 1)
+#ifndef WM_DISABLE_MSI
+#define WM_DISABLE_MSI 0
+#endif
+#ifndef WM_DISABLE_MSIX
+#define WM_DISABLE_MSIX 0
+#endif
+
+int wm_disable_msi = WM_DISABLE_MSI;
+int wm_disable_msix = WM_DISABLE_MSIX;
+
/*
* Transmit descriptor list size. Due to errata, we can only have
* 256 hardware descriptors in the ring on < 82544, but we use 4096
@@ -1831,6 +1841,17 @@ wm_attach(device_t parent, device_t self
counts[PCI_INTR_TYPE_MSIX] = sc->sc_nqueues + 1;
counts[PCI_INTR_TYPE_MSI] = 1;
counts[PCI_INTR_TYPE_INTX] = 1;
+ /* overridden by disable flags */
+ if (wm_disable_msi != 0) {
+ counts[PCI_INTR_TYPE_MSI] = 0;
+ if (wm_disable_msix != 0) {
+ max_type = PCI_INTR_TYPE_INTX;
+ counts[PCI_INTR_TYPE_MSIX] = 0;
+ }
+ } else if (wm_disable_msix != 0) {
+ max_type = PCI_INTR_TYPE_MSI;
+ counts[PCI_INTR_TYPE_MSIX] = 0;
+ }
alloc_retry:
if (pci_intr_alloc(pa, &sc->sc_intrs, counts, max_type) != 0) {
