[src/trunk]: src/sys/arch make pci_intr_alloc() try also MSI-X by default (wi...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b20673c2a76b
branches:  trunk
changeset: 446214:b20673c2a76b
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Tue Nov 27 20:08:05 2018 +0000

description:
make pci_intr_alloc() try also MSI-X by default (with NULL count);
there are boards/emulators which only have MSI-X and no MSI, and
so far there is no evidence there are devices which support both
and don't work in MSI-X mode

this change is supposed to reduce amount of needed cut&paste code in drivers

discussed briefly with jmcneill@

diffstat:

 sys/arch/arm/pci/pci_msi_machdep.c  |  6 +++---
 sys/arch/x86/pci/pci_intr_machdep.c |  5 +++--
 2 files changed, 6 insertions(+), 5 deletions(-)

diffs (53 lines):

diff -r 0abe4514ec9b -r b20673c2a76b sys/arch/arm/pci/pci_msi_machdep.c
--- a/sys/arch/arm/pci/pci_msi_machdep.c        Tue Nov 27 19:17:02 2018 +0000
+++ b/sys/arch/arm/pci/pci_msi_machdep.c        Tue Nov 27 20:08:05 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pci_msi_machdep.c,v 1.3 2018/11/16 15:06:22 jmcneill Exp $ */
+/* $NetBSD: pci_msi_machdep.c,v 1.4 2018/11/27 20:08:05 jdolecek Exp $ */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pci_msi_machdep.c,v 1.3 2018/11/16 15:06:22 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pci_msi_machdep.c,v 1.4 2018/11/27 20:08:05 jdolecek Exp $");
 
 #include <sys/kernel.h>
 #include <sys/kmem.h>
@@ -188,7 +188,7 @@
        error = EINVAL;
        intx_count = 1;
        msi_count = 1;
-       msix_count = 0;
+       msix_count = 1;
 
        if (counts != NULL) {
                switch (max_type) {
diff -r 0abe4514ec9b -r b20673c2a76b sys/arch/x86/pci/pci_intr_machdep.c
--- a/sys/arch/x86/pci/pci_intr_machdep.c       Tue Nov 27 19:17:02 2018 +0000
+++ b/sys/arch/x86/pci/pci_intr_machdep.c       Tue Nov 27 20:08:05 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pci_intr_machdep.c,v 1.45 2018/09/23 02:51:06 cherry Exp $     */
+/*     $NetBSD: pci_intr_machdep.c,v 1.46 2018/11/27 20:08:05 jdolecek Exp $   */
 
 /*-
  * Copyright (c) 1997, 1998, 2009 The NetBSD Foundation, Inc.
@@ -73,7 +73,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pci_intr_machdep.c,v 1.45 2018/09/23 02:51:06 cherry Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pci_intr_machdep.c,v 1.46 2018/11/27 20:08:05 jdolecek Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -514,6 +514,7 @@
 
        intx_count = msi_count = msix_count = 0;
        if (counts == NULL) { /* simple pattern */
+               msix_count = 1;
                msi_count = 1;
                intx_count = 1;
        } else {