[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/xen/pci.c b/ap/os/linux/linux-3.4.x/drivers/xen/pci.c
new file mode 100644
index 0000000..b84bf0b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/xen/pci.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2009, Intel Corporation.
+ *
+ * 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 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Author: Weidong Han <weidong.han@intel.com>
+ */
+
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <xen/xen.h>
+#include <xen/interface/physdev.h>
+#include <xen/interface/xen.h>
+
+#include <asm/xen/hypervisor.h>
+#include <asm/xen/hypercall.h>
+#include "../pci/pci.h"
+
+static bool __read_mostly pci_seg_supported = true;
+
+static int xen_add_device(struct device *dev)
+{
+ int r;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+#ifdef CONFIG_PCI_IOV
+ struct pci_dev *physfn = pci_dev->physfn;
+#endif
+
+ if (pci_seg_supported) {
+ struct physdev_pci_device_add add = {
+ .seg = pci_domain_nr(pci_dev->bus),
+ .bus = pci_dev->bus->number,
+ .devfn = pci_dev->devfn
+ };
+#ifdef CONFIG_ACPI
+ acpi_handle handle;
+#endif
+
+#ifdef CONFIG_PCI_IOV
+ if (pci_dev->is_virtfn) {
+ add.flags = XEN_PCI_DEV_VIRTFN;
+ add.physfn.bus = physfn->bus->number;
+ add.physfn.devfn = physfn->devfn;
+ } else
+#endif
+ if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn))
+ add.flags = XEN_PCI_DEV_EXTFN;
+
+#ifdef CONFIG_ACPI
+ handle = DEVICE_ACPI_HANDLE(&pci_dev->dev);
+ if (!handle)
+ handle = DEVICE_ACPI_HANDLE(pci_dev->bus->bridge);
+#ifdef CONFIG_PCI_IOV
+ if (!handle && pci_dev->is_virtfn)
+ handle = DEVICE_ACPI_HANDLE(physfn->bus->bridge);
+#endif
+ if (handle) {
+ acpi_status status;
+
+ do {
+ unsigned long long pxm;
+
+ status = acpi_evaluate_integer(handle, "_PXM",
+ NULL, &pxm);
+ if (ACPI_SUCCESS(status)) {
+ add.optarr[0] = pxm;
+ add.flags |= XEN_PCI_DEV_PXM;
+ break;
+ }
+ status = acpi_get_parent(handle, &handle);
+ } while (ACPI_SUCCESS(status));
+ }
+#endif /* CONFIG_ACPI */
+
+ r = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, &add);
+ if (r != -ENOSYS)
+ return r;
+ pci_seg_supported = false;
+ }
+
+ if (pci_domain_nr(pci_dev->bus))
+ r = -ENOSYS;
+#ifdef CONFIG_PCI_IOV
+ else if (pci_dev->is_virtfn) {
+ struct physdev_manage_pci_ext manage_pci_ext = {
+ .bus = pci_dev->bus->number,
+ .devfn = pci_dev->devfn,
+ .is_virtfn = 1,
+ .physfn.bus = physfn->bus->number,
+ .physfn.devfn = physfn->devfn,
+ };
+
+ r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
+ &manage_pci_ext);
+ }
+#endif
+ else if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) {
+ struct physdev_manage_pci_ext manage_pci_ext = {
+ .bus = pci_dev->bus->number,
+ .devfn = pci_dev->devfn,
+ .is_extfn = 1,
+ };
+
+ r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
+ &manage_pci_ext);
+ } else {
+ struct physdev_manage_pci manage_pci = {
+ .bus = pci_dev->bus->number,
+ .devfn = pci_dev->devfn,
+ };
+
+ r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add,
+ &manage_pci);
+ }
+
+ return r;
+}
+
+static int xen_remove_device(struct device *dev)
+{
+ int r;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+
+ if (pci_seg_supported) {
+ struct physdev_pci_device device = {
+ .seg = pci_domain_nr(pci_dev->bus),
+ .bus = pci_dev->bus->number,
+ .devfn = pci_dev->devfn
+ };
+
+ r = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_remove,
+ &device);
+ } else if (pci_domain_nr(pci_dev->bus))
+ r = -ENOSYS;
+ else {
+ struct physdev_manage_pci manage_pci = {
+ .bus = pci_dev->bus->number,
+ .devfn = pci_dev->devfn
+ };
+
+ r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
+ &manage_pci);
+ }
+
+ return r;
+}
+
+static int xen_pci_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+ int r = 0;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ r = xen_add_device(dev);
+ break;
+ case BUS_NOTIFY_DEL_DEVICE:
+ r = xen_remove_device(dev);
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+ if (r)
+ dev_err(dev, "Failed to %s - passthrough or MSI/MSI-X might fail!\n",
+ action == BUS_NOTIFY_ADD_DEVICE ? "add" :
+ (action == BUS_NOTIFY_DEL_DEVICE ? "delete" : "?"));
+ return NOTIFY_OK;
+}
+
+static struct notifier_block device_nb = {
+ .notifier_call = xen_pci_notifier,
+};
+
+static int __init register_xen_pci_notifier(void)
+{
+ if (!xen_initial_domain())
+ return 0;
+
+ return bus_register_notifier(&pci_bus_type, &device_nb);
+}
+
+arch_initcall(register_xen_pci_notifier);