powerpc/eeh: Move common part to kernel directory

The patch moves the common part of EEH core into arch/powerpc/kernel
directory so that we needn't PPC_PSERIES while compiling POWERNV
platform:

        * Move the EEH common part into arch/powerpc/kernel
        * Move the functions for PCI hotplug from pSeries platform to
          arch/powerpc/kernel/pci-hotplug.c
        * Move CONFIG_EEH from arch/powerpc/platforms/pseries/Kconfig to
          arch/powerpc/platforms/Kconfig
        * Adjust makefile accordingly

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

13 files changed, 120 insertions, 97 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index f960a7944553..a8619bfe879e 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -58,6 +58,8 @@ obj-$(CONFIG_RTAS_PROC)		+= rtas-proc.o
 obj-$(CONFIG_LPARCFG)           += lparcfg.o
 obj-$(CONFIG_IBMVIO)            += vio.o
 obj-$(CONFIG_IBMEBUS)           += ibmebus.o
+obj-$(CONFIG_EEH)              += eeh.o eeh_pe.o eeh_dev.o eeh_cache.o \
+                                  eeh_driver.o eeh_event.o eeh_sysfs.o
 obj-$(CONFIG_GENERIC_TBSYNC)    += smp-tbsync.o
 obj-$(CONFIG_CRASH_DUMP)        += crash_dump.o
 obj-$(CONFIG_FA_DUMP)           += fadump.o
@@ -100,7 +102,7 @@ obj-$(CONFIG_PPC_UDBG_16550)	+= legacy_serial.o udbg_16550.o
 obj-$(CONFIG_STACKTRACE)        += stacktrace.o
 obj-$(CONFIG_SWIOTLB)           += dma-swiotlb.o
 
-pci64-$(CONFIG_PPC64)           += pci_dn.o isa-bridge.o
+pci64-$(CONFIG_PPC64)           += pci_dn.o pci-hotplug.o isa-bridge.o
 obj-$(CONFIG_PCI)               += pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \
                                    pci-common.o pci_of_scan.o
 obj-$(CONFIG_PCI_MSI)           += msi.o
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/kernel/eeh.c
index 8a8345193083..8a8345193083 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
diff --git a/arch/powerpc/platforms/pseries/eeh_cache.c b/arch/powerpc/kernel/eeh_cache.c
index 5a4c87903057..1d5d9a6ba740 100644
--- a/arch/powerpc/platforms/pseries/eeh_cache.c
+++ b/arch/powerpc/kernel/eeh_cache.c
@@ -316,4 +316,3 @@ void __init eeh_addr_cache_build(void)
         eeh_addr_cache_print(&pci_io_addr_cache_root);
 #endif
 }
-
diff --git a/arch/powerpc/platforms/pseries/eeh_dev.c b/arch/powerpc/kernel/eeh_dev.c
index 1efa28f5fc54..1efa28f5fc54 100644
--- a/arch/powerpc/platforms/pseries/eeh_dev.c
+++ b/arch/powerpc/kernel/eeh_dev.c
diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 0acc5a2bdfc7..fb927af9a9ef 100644
--- a/arch/powerpc/platforms/pseries/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -549,4 +549,3 @@ perm_error:
         if (frozen_bus)
                 pcibios_remove_pci_devices(frozen_bus);
 }
-
diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/kernel/eeh_event.c
index 185bedd926df..185bedd926df 100644
--- a/arch/powerpc/platforms/pseries/eeh_event.c
+++ b/arch/powerpc/kernel/eeh_event.c
diff --git a/arch/powerpc/platforms/pseries/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index 9d4a9e8562b2..9d4a9e8562b2 100644
--- a/arch/powerpc/platforms/pseries/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
diff --git a/arch/powerpc/platforms/pseries/eeh_sysfs.c b/arch/powerpc/kernel/eeh_sysfs.c
index d37708360f2e..e7ae3484918c 100644
--- a/arch/powerpc/platforms/pseries/eeh_sysfs.c
+++ b/arch/powerpc/kernel/eeh_sysfs.c
@@ -72,4 +72,3 @@ void eeh_sysfs_remove_device(struct pci_dev *pdev)
         device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
         device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
 }
-
diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c
new file mode 100644
index 000000000000..3f608800c06b
--- /dev/null
+++ b/arch/powerpc/kernel/pci-hotplug.c
@@ -0,0 +1,111 @@
+/*
+ * Derived from "arch/powerpc/platforms/pseries/pci_dlpar.c"
+ *
+ * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
+ * Copyright (C) 2005 International Business Machines
+ *
+ * Updates, 2005, John Rose <johnrose@austin.ibm.com>
+ * Updates, 2005, Linas Vepstas <linas@austin.ibm.com>
+ * Updates, 2013, Gavin Shan <shangw@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/pci.h>
+#include <linux/export.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc-pci.h>
+#include <asm/firmware.h>
+#include <asm/eeh.h>
+
+/**
+ * __pcibios_remove_pci_devices - remove all devices under this bus
+ * @bus: the indicated PCI bus
+ * @purge_pe: destroy the PE on removal of PCI devices
+ *
+ * Remove all of the PCI devices under this bus both from the
+ * linux pci device tree, and from the powerpc EEH address cache.
+ * By default, the corresponding PE will be destroied during the
+ * normal PCI hotplug path. For PCI hotplug during EEH recovery,
+ * the corresponding PE won't be destroied and deallocated.
+ */
+void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe)
+{
+        struct pci_dev *dev, *tmp;
+        struct pci_bus *child_bus;
+
+        /* First go down child busses */
+        list_for_each_entry(child_bus, &bus->children, node)
+                __pcibios_remove_pci_devices(child_bus, purge_pe);
+
+        pr_debug("PCI: Removing devices on bus %04x:%02x\n",
+                 pci_domain_nr(bus),  bus->number);
+        list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
+                pr_debug("     * Removing %s...\n", pci_name(dev));
+                eeh_remove_bus_device(dev, purge_pe);
+                pci_stop_and_remove_bus_device(dev);
+        }
+}
+
+/**
+ * pcibios_remove_pci_devices - remove all devices under this bus
+ * @bus: the indicated PCI bus
+ *
+ * Remove all of the PCI devices under this bus both from the
+ * linux pci device tree, and from the powerpc EEH address cache.
+ */
+void pcibios_remove_pci_devices(struct pci_bus *bus)
+{
+        __pcibios_remove_pci_devices(bus, 1);
+}
+EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
+
+/**
+ * pcibios_add_pci_devices - adds new pci devices to bus
+ * @bus: the indicated PCI bus
+ *
+ * This routine will find and fixup new pci devices under
+ * the indicated bus. This routine presumes that there
+ * might already be some devices under this bridge, so
+ * it carefully tries to add only new devices.  (And that
+ * is how this routine differs from other, similar pcibios
+ * routines.)
+ */
+void pcibios_add_pci_devices(struct pci_bus * bus)
+{
+        int slotno, num, mode, pass, max;
+        struct pci_dev *dev;
+        struct device_node *dn = pci_bus_to_OF_node(bus);
+
+        eeh_add_device_tree_early(dn);
+
+        mode = PCI_PROBE_NORMAL;
+        if (ppc_md.pci_probe_mode)
+                mode = ppc_md.pci_probe_mode(bus);
+
+        if (mode == PCI_PROBE_DEVTREE) {
+                /* use ofdt-based probe */
+                of_rescan_bus(dn, bus);
+        } else if (mode == PCI_PROBE_NORMAL) {
+                /* use legacy probe */
+                slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
+                num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
+                if (!num)
+                        return;
+                pcibios_setup_bus_devices(bus);
+                max = bus->busn_res.start;
+                for (pass = 0; pass < 2; pass++) {
+                        list_for_each_entry(dev, &bus->devices, bus_list) {
+                                if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
+                                    dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
+                                        max = pci_scan_bridge(bus, dev,
+                                                              max, pass);
+                        }
+                }
+        }
+        pcibios_finish_adding_to_bus(bus);
+}
+EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index b62aab3e22ec..bed8c607588c 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -164,6 +164,11 @@ config IBMEBUS
         help
           Bus device driver for GX bus based adapters.
 
+config EEH
+        bool
+        depends on (PPC_POWERNV || PPC_PSERIES) && PCI
+        default y
+
 config PPC_MPC106
         bool
         default n
diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index 4459eff7a75a..1bd3399146ed 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -33,11 +33,6 @@ config PPC_SPLPAR
           processors, that is, which share physical processors between
           two or more partitions.
 
-config EEH
-        bool
-        depends on PPC_PSERIES && PCI
-        default y
-
 config PSERIES_MSI
        bool
        depends on PCI_MSI && EEH
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index 53866e537a92..8ae010381316 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -6,9 +6,7 @@ obj-y			:= lpar.o hvCall.o nvram.o reconfig.o \
                            firmware.o power.o dlpar.o mobility.o
 obj-$(CONFIG_SMP)       += smp.o
 obj-$(CONFIG_SCANLOG)   += scanlog.o
-obj-$(CONFIG_EEH)       += eeh.o eeh_pe.o eeh_dev.o eeh_cache.o \
-                           eeh_driver.o eeh_event.o eeh_sysfs.o \
-                           eeh_pseries.o
+obj-$(CONFIG_EEH)       += eeh_pseries.o
 obj-$(CONFIG_KEXEC)     += kexec.o
 obj-$(CONFIG_PCI)       += pci.o pci_dlpar.o
 obj-$(CONFIG_PSERIES_MSI)       += msi.o
diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c
index c91b22be9288..efe61374f6ea 100644
--- a/arch/powerpc/platforms/pseries/pci_dlpar.c
+++ b/arch/powerpc/platforms/pseries/pci_dlpar.c
@@ -64,91 +64,6 @@ pcibios_find_pci_bus(struct device_node *dn)
 }
 EXPORT_SYMBOL_GPL(pcibios_find_pci_bus);
 
-/**
- * __pcibios_remove_pci_devices - remove all devices under this bus
- * @bus: the indicated PCI bus
- * @purge_pe: destroy the PE on removal of PCI devices
- *
- * Remove all of the PCI devices under this bus both from the
- * linux pci device tree, and from the powerpc EEH address cache.
- * By default, the corresponding PE will be destroied during the
- * normal PCI hotplug path. For PCI hotplug during EEH recovery,
- * the corresponding PE won't be destroied and deallocated.
- */
-void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe)
-{
-        struct pci_dev *dev, *tmp;
-        struct pci_bus *child_bus;
-
-        /* First go down child busses */
-        list_for_each_entry(child_bus, &bus->children, node)
-                __pcibios_remove_pci_devices(child_bus, purge_pe);
-
-        pr_debug("PCI: Removing devices on bus %04x:%02x\n",
-                pci_domain_nr(bus),  bus->number);
-        list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
-                pr_debug("     * Removing %s...\n", pci_name(dev));
-                eeh_remove_bus_device(dev, purge_pe);
-                pci_stop_and_remove_bus_device(dev);
-        }
-}
-
-/**
- * pcibios_remove_pci_devices - remove all devices under this bus
- *
- * Remove all of the PCI devices under this bus both from the
- * linux pci device tree, and from the powerpc EEH address cache.
- */
-void pcibios_remove_pci_devices(struct pci_bus *bus)
-{
-        __pcibios_remove_pci_devices(bus, 1);
-}
-EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
-
-/**
- * pcibios_add_pci_devices - adds new pci devices to bus
- *
- * This routine will find and fixup new pci devices under
- * the indicated bus. This routine presumes that there
- * might already be some devices under this bridge, so
- * it carefully tries to add only new devices.  (And that
- * is how this routine differs from other, similar pcibios
- * routines.)
- */
-void pcibios_add_pci_devices(struct pci_bus * bus)
-{
-        int slotno, num, mode, pass, max;
-        struct pci_dev *dev;
-        struct device_node *dn = pci_bus_to_OF_node(bus);
-
-        eeh_add_device_tree_early(dn);
-
-        mode = PCI_PROBE_NORMAL;
-        if (ppc_md.pci_probe_mode)
-                mode = ppc_md.pci_probe_mode(bus);
-
-        if (mode == PCI_PROBE_DEVTREE) {
-                /* use ofdt-based probe */
-                of_rescan_bus(dn, bus);
-        } else if (mode == PCI_PROBE_NORMAL) {
-                /* use legacy probe */
-                slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
-                num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
-                if (!num)
-                        return;
-                pcibios_setup_bus_devices(bus);
-                max = bus->busn_res.start;
-                for (pass=0; pass < 2; pass++)
-                        list_for_each_entry(dev, &bus->devices, bus_list) {
-                        if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
-                            dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
-                                max = pci_scan_bridge(bus, dev, max, pass);
-                }
-        }
-        pcibios_finish_adding_to_bus(bus);
-}
-EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);
-
 struct pci_controller *init_phb_dynamic(struct device_node *dn)
 {
         struct pci_controller *phb;