[src/trunk]: src/sys/arch/arm/acpi Fix detection of root port resources for G...

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

details:   https://anonhg.NetBSD.org/src/rev/004773abcb5c
branches:  trunk
changeset: 455333:004773abcb5c
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Tue Oct 15 00:23:44 2019 +0000

description:
Fix detection of root port resources for Graviton and remove no longer required bridge fixup

diffstat:

 sys/arch/arm/acpi/acpipchb.c |  66 ++++++++------------------------------------
 1 files changed, 12 insertions(+), 54 deletions(-)

diffs (109 lines):

diff -r 4b6f00827236 -r 004773abcb5c sys/arch/arm/acpi/acpipchb.c
--- a/sys/arch/arm/acpi/acpipchb.c      Tue Oct 15 00:13:52 2019 +0000
+++ b/sys/arch/arm/acpi/acpipchb.c      Tue Oct 15 00:23:44 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: acpipchb.c,v 1.11 2019/10/14 22:59:15 jmcneill Exp $ */
+/* $NetBSD: acpipchb.c,v 1.12 2019/10/15 00:23:44 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpipchb.c,v 1.11 2019/10/14 22:59:15 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpipchb.c,v 1.12 2019/10/15 00:23:44 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -146,9 +146,16 @@
        struct acpi_pci_context *ap = ctx;
        struct acpi_resources res;
        struct acpi_mem *mem;
+       ACPI_HANDLE parent;
        ACPI_STATUS rv;
        int error;
 
+       rv = AcpiGetParent(handle, &parent);
+       if (ACPI_FAILURE(rv))
+               return rv;
+       if (ap->ap_handle != parent)
+               return AE_OK;
+
        rv = acpi_resource_parse(ap->ap_dev, handle, "_CRS", &res, &acpi_resource_parse_ops_quiet);
        if (ACPI_FAILURE(rv))
                return rv;
@@ -163,18 +170,10 @@
        if (error != 0)
                return AE_NO_MEMORY;
 
-       return AE_CTRL_TERMINATE;
-}
+       ap->ap_conf_read = acpipchb_amazon_graviton_conf_read;
+       ap->ap_conf_write = acpipchb_amazon_graviton_conf_write;
+       ap->ap_bus_maxdevs = acpipchb_amazon_graviton_bus_maxdevs;
 
-static ACPI_STATUS
-acpipchb_amazon_graviton_busres(ACPI_RESOURCE *res, void *context)
-{
-       if (res->Type != ACPI_RESOURCE_TYPE_ADDRESS16)
-               return AE_OK;
-       if (res->Data.Address16.ResourceType != ACPI_BUS_NUMBER_RANGE)
-               return AE_OK;
-
-       *(ACPI_RESOURCE *)context = *res;
        return AE_CTRL_TERMINATE;
 }
 
@@ -182,51 +181,10 @@
 acpipchb_amazon_graviton_init(struct acpi_pci_context *ap)
 {
        ACPI_STATUS rv;
-       ACPI_RESOURCE res;
-       pcitag_t tag;
-       pcireg_t busdata;
 
        rv = AcpiGetDevices(__UNCONST("AMZN0001"), acpipchb_amazon_graviton_map, ap, NULL);
        if (ACPI_FAILURE(rv))
                return;
-
-       ap->ap_conf_read = acpipchb_amazon_graviton_conf_read;
-       ap->ap_conf_write = acpipchb_amazon_graviton_conf_write;
-       ap->ap_bus_maxdevs = acpipchb_amazon_graviton_bus_maxdevs;
-
-       /*
-        * The root port's may not have the correct bus information. Fix this up...
-        */
-       /* Find bus number range */
-       memset(&res, 0, sizeof(res));
-       rv = AcpiWalkResources(ap->ap_handle, "_CRS", acpipchb_amazon_graviton_busres, &res);
-       if (ACPI_FAILURE(rv) || res.Type != ACPI_RESOURCE_TYPE_ADDRESS16)
-               return;
-
-       const int bus_primary = res.Data.Address16.Address.Minimum;
-       const int bus_secondary = bus_primary + 1;
-       const int bus_subordinate = res.Data.Address16.Address.Maximum;
-
-       tag = pci_make_tag(&ap->ap_pc, ap->ap_bus, 0, 0);
-       busdata = pci_conf_read(&ap->ap_pc, tag, PCI_BRIDGE_BUS_REG);
-       if (PCI_BRIDGE_BUS_NUM_PRIMARY(busdata) != bus_primary ||
-           PCI_BRIDGE_BUS_NUM_SECONDARY(busdata) != bus_secondary ||
-           PCI_BRIDGE_BUS_NUM_SUBORDINATE(busdata) != bus_subordinate) {
-
-               aprint_normal_dev(ap->ap_dev,
-                   "fixup bridge bus numbers %#x/%#x/%#x -> %#x/%#x/%#x\n",
-                   PCI_BRIDGE_BUS_NUM_PRIMARY(busdata),
-                   PCI_BRIDGE_BUS_NUM_SECONDARY(busdata),
-                   PCI_BRIDGE_BUS_NUM_SUBORDINATE(busdata),
-                   bus_primary, bus_secondary, bus_subordinate);
-               busdata &= ~PCI_BRIDGE_BUS_PRIMARY;
-               busdata |= __SHIFTIN(bus_primary, PCI_BRIDGE_BUS_PRIMARY);
-               busdata &= ~PCI_BRIDGE_BUS_SECONDARY;
-               busdata |= __SHIFTIN(bus_secondary, PCI_BRIDGE_BUS_SECONDARY);
-               busdata &= ~PCI_BRIDGE_BUS_SUBORDINATE;
-               busdata |= __SHIFTIN(bus_subordinate, PCI_BRIDGE_BUS_SUBORDINATE);
-               pci_conf_write(&ap->ap_pc, tag, PCI_BRIDGE_BUS_REG, busdata);
-       }
 }
 
 static const struct acpipchb_quirk {