[PATCH] PCI Hotplug: Add PPC64 PCI Hotplug Driver for RPA

drivers/pci/hotplug/Kconfig

@@ -189,5 +189,16 @@ config HOTPLUG_PCI_SHPC_PHPRM_LEGACY
 	  Say Y here for AMD SHPC. You have to select this option if you are 
 	  using this driver on AMD platform with SHPC.
 
+config HOTPLUG_PCI_RPA
+	tristate "RPA PCI Hotplug driver"
+	depends on HOTPLUG_PCI && PPC_PSERIES && PPC64
+	help
+	  Say Y here if you have a a RPA system that supports PCI Hotplug.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rpaphp.
+
+	  When in doubt, say N.
+
 endmenu
 

drivers/pci/hotplug/Makefile

@@ -11,6 +11,7 @@ obj-$(CONFIG_HOTPLUG_PCI_CPCI_ZT5550)	+= cpcihp_zt5550.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_GENERIC)	+= cpcihp_generic.o
 obj-$(CONFIG_HOTPLUG_PCI_PCIE)		+= pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_SHPC)		+= shpchp.o
+obj-$(CONFIG_HOTPLUG_PCI_RPA)		+= rpaphp.o
 
 pci_hotplug-objs	:=	pci_hotplug_core.o
 
@@ -35,6 +36,9 @@ acpiphp-objs		:=	acpiphp_core.o	\
 				acpiphp_pci.o	\
 				acpiphp_res.o
 
+rpaphp-objs		:=	rpaphp_core.o	\
+				rpaphp_pci.o	
+
 pciehp-objs		:=	pciehp_core.o	\
 				pciehp_ctrl.o	\
 				pciehp_pci.o	\

drivers/pci/hotplug/rpaphp.h

+/*
+ * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
+ *
+ * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
+ *
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT.  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <lxie@us.ibm.com>,
+ *
+ */
+
+#ifndef _PPC64PHP_H
+#define _PPC64PHP_H
+#include "pci_hotplug.h"
+
+#define DR_INDICATOR 9002
+#define DR_ENTITY_SENSE 9003
+
+#define POWER_ON	100
+#define POWER_OFF	0
+
+#define LED_OFF		0 
+#define LED_ON		1	/* continuous on */ 
+#define LED_ID		2	/* slow blinking */
+#define LED_ACTION	3	/* fast blinking */
+
+#define SLOT_NAME_SIZE 12
+
+/* Error status from rtas_get-sensor */
+#define NEED_POWER    -9000     /* slot must be power up and unisolated to get state */
+#define PWR_ONLY      -9001     /* slot must be powerd up to get state, leave isolated */
+#define ERR_SENSE_USE -9002     /* No DR operation will succeed, slot is unusable  */
+
+/* Sensor values from rtas_get-sensor */
+#define EMPTY	0       /* No card in slot */
+#define PRESENT	1       /* Card in slot */
+
+#define MY_NAME "rpaphp"
+
+#define dbg(format, arg...)					\
+	do {							\
+		if (rpaphp_debug)				\
+			printk(KERN_DEBUG "%s: " format,	\
+				MY_NAME , ## arg); 		\
+	} while (0)
+#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
+#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
+#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
+
+#define SLOT_MAGIC	0x67267322
+
+/* slot states */
+
+#define	NOT_VALID	3
+#define	NOT_CONFIGURED	2
+#define	CONFIGURED	1
+#define	EMPTY		0
+
+/*
+ * struct slot - slot information for each *physical* slot
+ */
+struct slot {
+	u32	magic;
+	int     state;
+	u32     index;
+	u32     type;
+	u32     power_domain;
+	char    *name;
+	struct	device_node *dn;/* slot's device_node in OFDT		*/
+				/* dn has phb info			*/
+	struct	pci_dev	*bridge;/* slot's pci_dev in pci_devices	*/
+
+	struct	pci_dev	*dev;	/* pci_dev of device in this slot 	*/
+				/* it will be used for unconfig		*/ 
+				/* NULL if slot is empty		*/
+
+	struct  hotplug_slot    *hotplug_slot;
+	struct list_head	rpaphp_slot_list;
+};
+
+extern struct pci_dev *rpaphp_find_pci_dev(struct device_node *dn);
+extern int rpaphp_add_slot(char *slot_name);
+extern int rpaphp_remove_slot(struct slot *slot);
+extern int rpaphp_claim_resource(struct pci_dev *dev, int resource);
+
+#endif /* _PPC64PHP_H */

drivers/pci/hotplug/rpaphp_pci.c

+/*
+ * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
+ * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
+ *
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT.  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <lxie@us.ibm.com>
+ *
+ */
+#include <linux/pci.h>
+#include <asm/pci-bridge.h>	/* for pci_controller */
+#include "rpaphp.h"
+
+
+struct pci_dev *rpaphp_find_pci_dev(struct device_node *dn)
+{
+	struct pci_dev		*retval_dev = NULL, *dev = NULL;
+
+	while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+		if(!dev->bus)
+			continue;
+
+		if (dev->devfn != dn->devfn)
+			continue;
+
+		if (dn->phb->global_number == pci_domain_nr(dev->bus) &&
+		    dn->busno == dev->bus->number) {
+			retval_dev = dev;
+			break;
+		}
+	}
+
+	return retval_dev;
+
+}
+
+int rpaphp_claim_resource(struct pci_dev *dev, int resource)
+{
+	struct resource *res = &dev->resource[resource];
+	struct resource *root = pci_find_parent_resource(dev, res);
+	char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
+	int err;
+
+	err = -EINVAL;
+	if (root != NULL) {
+		err = request_resource(root, res);
+	}
+
+	if (err) {
+		err("PCI: %s region %d of %s %s [%lx:%lx]\n",
+			root ? "Address space collision on" :
+			"No parent found for",
+			resource, dtype, pci_name(dev), res->start, res->end);
+	}
+
+	return err;
+}
+
+EXPORT_SYMBOL_GPL(rpaphp_find_pci_dev);
+EXPORT_SYMBOL_GPL(rpaphp_claim_resource);