[src/trunk]: src/sys/dev/acpi Add acpimcfg_conf_valid helper for pcie control...

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

details:   https://anonhg.NetBSD.org/src/rev/15f04825fac6
branches:  trunk
changeset: 848603:15f04825fac6
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Feb 02 16:31:25 2020 +0000

description:
Add acpimcfg_conf_valid helper for pcie controllers with nonstandard
config space layouts.

diffstat:

 sys/dev/acpi/acpi_mcfg.c |  29 +++++++++++++++++++++++++++--
 sys/dev/acpi/acpi_mcfg.h |   3 ++-
 2 files changed, 29 insertions(+), 3 deletions(-)

diffs (64 lines):

diff -r ba3e240a6188 -r 15f04825fac6 sys/dev/acpi/acpi_mcfg.c
--- a/sys/dev/acpi/acpi_mcfg.c  Sun Feb 02 16:30:31 2020 +0000
+++ b/sys/dev/acpi/acpi_mcfg.c  Sun Feb 02 16:31:25 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: acpi_mcfg.c,v 1.17 2019/10/14 00:15:13 jmcneill Exp $  */
+/*     $NetBSD: acpi_mcfg.c,v 1.18 2020/02/02 16:31:25 jmcneill Exp $  */
 
 /*-
  * Copyright (C) 2015 NONAKA Kimihiro <nonaka%NetBSD.org@localhost>
@@ -28,7 +28,7 @@
 #include "opt_pci.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.17 2019/10/14 00:15:13 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.18 2020/02/02 16:31:25 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -962,3 +962,28 @@
        mcfg_ops->ao_write(seg->ms_bst, mb->bsh[dev][func], reg, data);
        return 0;
 }
+
+bool
+acpimcfg_conf_valid(pci_chipset_tag_t pc, pcitag_t tag, int reg)
+{
+       struct mcfg_segment *seg = NULL;
+       struct mcfg_bus *mb;
+       int bus, dev, func;
+
+       if (!mcfg_inited)
+               return false;
+
+       pci_decompose_tag(pc, tag, &bus, &dev, &func);
+
+       seg = acpimcfg_get_segment(pc, bus);
+       if (seg == NULL)
+               return false;
+
+       mb = &seg->ms_bus[bus - seg->ms_bus_start];
+       if (!PCIDEV_IS_VALID(mb, dev, func))
+               return false;
+       if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE)
+               return false;
+
+       return true;
+}
diff -r ba3e240a6188 -r 15f04825fac6 sys/dev/acpi/acpi_mcfg.h
--- a/sys/dev/acpi/acpi_mcfg.h  Sun Feb 02 16:30:31 2020 +0000
+++ b/sys/dev/acpi/acpi_mcfg.h  Sun Feb 02 16:31:25 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: acpi_mcfg.h,v 1.2 2018/10/15 10:01:32 jmcneill Exp $   */
+/*     $NetBSD: acpi_mcfg.h,v 1.3 2020/02/02 16:31:25 jmcneill Exp $   */
 
 /*-
  * Copyright (C) 2015 NONAKA Kimihiro <nonaka%NetBSD.org@localhost>
@@ -36,6 +36,7 @@
 
 int    acpimcfg_conf_read(pci_chipset_tag_t, pcitag_t, int, pcireg_t *);
 int    acpimcfg_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t);
+bool   acpimcfg_conf_valid(pci_chipset_tag_t, pcitag_t, int);
 
 struct acpimcfg_ops {
        /* validate MCFG memory region */