[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/acpi/pci_slot.c b/src/kernel/linux/v4.19/drivers/acpi/pci_slot.c
new file mode 100644
index 0000000..e90b61f
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/acpi/pci_slot.c
@@ -0,0 +1,198 @@
+/*
+ * pci_slot.c - ACPI PCI Slot Driver
+ *
+ * The code here is heavily leveraged from the acpiphp module.
+ * Thanks to Matthew Wilcox <matthew@wil.cx> for much guidance.
+ * Thanks to Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> for code
+ * review and fixes.
+ *
+ * Copyright (C) 2007-2008 Hewlett-Packard Development Company, L.P.
+ * Alex Chiang <achiang@hp.com>
+ *
+ * Copyright (C) 2013 Huawei Tech. Co., Ltd.
+ * Jiang Liu <jiang.liu@huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/pci-acpi.h>
+
+static int check_sta_before_sun;
+
+#define _COMPONENT ACPI_PCI_COMPONENT
+ACPI_MODULE_NAME("pci_slot");
+
+#define SLOT_NAME_SIZE 21 /* Inspired by #define in acpiphp.h */
+
+struct acpi_pci_slot {
+ struct pci_slot *pci_slot; /* corresponding pci_slot */
+ struct list_head list; /* node in the list of slots */
+};
+
+static LIST_HEAD(slot_list);
+static DEFINE_MUTEX(slot_list_lock);
+
+static int
+check_slot(acpi_handle handle, unsigned long long *sun)
+{
+ int device = -1;
+ unsigned long long adr, sta;
+ acpi_status status;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ pr_debug("Checking slot on path: %s\n", (char *)buffer.pointer);
+
+ if (check_sta_before_sun) {
+ /* If SxFy doesn't have _STA, we just assume it's there */
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ if (ACPI_SUCCESS(status) && !(sta & ACPI_STA_DEVICE_PRESENT))
+ goto out;
+ }
+
+ status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
+ if (ACPI_FAILURE(status)) {
+ pr_debug("_ADR returned %d on %s\n",
+ status, (char *)buffer.pointer);
+ goto out;
+ }
+
+ /* No _SUN == not a slot == bail */
+ status = acpi_evaluate_integer(handle, "_SUN", NULL, sun);
+ if (ACPI_FAILURE(status)) {
+ pr_debug("_SUN returned %d on %s\n",
+ status, (char *)buffer.pointer);
+ goto out;
+ }
+
+ device = (adr >> 16) & 0xffff;
+out:
+ kfree(buffer.pointer);
+ return device;
+}
+
+/*
+ * Check whether handle has an associated slot and create PCI slot if it has.
+ */
+static acpi_status
+register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ int device;
+ unsigned long long sun;
+ char name[SLOT_NAME_SIZE];
+ struct acpi_pci_slot *slot;
+ struct pci_slot *pci_slot;
+ struct pci_bus *pci_bus = context;
+
+ device = check_slot(handle, &sun);
+ if (device < 0)
+ return AE_OK;
+
+ /*
+ * There may be multiple PCI functions associated with the same slot.
+ * Check whether PCI slot has already been created for this PCI device.
+ */
+ list_for_each_entry(slot, &slot_list, list) {
+ pci_slot = slot->pci_slot;
+ if (pci_slot->bus == pci_bus && pci_slot->number == device)
+ return AE_OK;
+ }
+
+ slot = kmalloc(sizeof(*slot), GFP_KERNEL);
+ if (!slot)
+ return AE_OK;
+
+ snprintf(name, sizeof(name), "%llu", sun);
+ pci_slot = pci_create_slot(pci_bus, device, name, NULL);
+ if (IS_ERR(pci_slot)) {
+ pr_err("pci_create_slot returned %ld\n", PTR_ERR(pci_slot));
+ kfree(slot);
+ return AE_OK;
+ }
+
+ slot->pci_slot = pci_slot;
+ list_add(&slot->list, &slot_list);
+
+ get_device(&pci_bus->dev);
+
+ pr_debug("%p, pci_bus: %x, device: %d, name: %s\n",
+ pci_slot, pci_bus->number, device, name);
+
+ return AE_OK;
+}
+
+void acpi_pci_slot_enumerate(struct pci_bus *bus)
+{
+ acpi_handle handle = ACPI_HANDLE(bus->bridge);
+
+ if (handle) {
+ mutex_lock(&slot_list_lock);
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
+ register_slot, NULL, bus, NULL);
+ mutex_unlock(&slot_list_lock);
+ }
+}
+
+void acpi_pci_slot_remove(struct pci_bus *bus)
+{
+ struct acpi_pci_slot *slot, *tmp;
+
+ mutex_lock(&slot_list_lock);
+ list_for_each_entry_safe(slot, tmp, &slot_list, list) {
+ if (slot->pci_slot->bus == bus) {
+ list_del(&slot->list);
+ pci_destroy_slot(slot->pci_slot);
+ put_device(&bus->dev);
+ kfree(slot);
+ }
+ }
+ mutex_unlock(&slot_list_lock);
+}
+
+static int do_sta_before_sun(const struct dmi_system_id *d)
+{
+ pr_info("%s detected: will evaluate _STA before calling _SUN\n",
+ d->ident);
+ check_sta_before_sun = 1;
+ return 0;
+}
+
+static const struct dmi_system_id acpi_pci_slot_dmi_table[] __initconst = {
+ /*
+ * Fujitsu Primequest machines will return 1023 to indicate an
+ * error if the _SUN method is evaluated on SxFy objects that
+ * are not present (as indicated by _STA), so for those machines,
+ * we want to check _STA before evaluating _SUN.
+ */
+ {
+ .callback = do_sta_before_sun,
+ .ident = "Fujitsu PRIMEQUEST",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "FUJITSU LIMITED"),
+ DMI_MATCH(DMI_BIOS_VERSION, "PRIMEQUEST"),
+ },
+ },
+ {}
+};
+
+void __init acpi_pci_slot_init(void)
+{
+ dmi_check_system(acpi_pci_slot_dmi_table);
+}