Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 536 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
new file mode 100644
index 000000000000..29117a3a3287
--- /dev/null
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -0,0 +1,536 @@
+/*
+ * 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/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <asm/eeh.h>       /* for eeh_add_device() */
+#include <asm/rtas.h>		/* rtas_call */
+#include <asm/pci-bridge.h>	/* for pci_controller */
+#include "../pci.h"		/* for pci_add_new_bus */
+				/* and pci_do_scan_bus */
+#include "rpaphp.h"
+#include "pci_hotplug.h"
+
+int debug;
+static struct semaphore rpaphp_sem;
+LIST_HEAD(rpaphp_slot_head);
+int num_slots;
+
+#define DRIVER_VERSION	"0.1"
+#define DRIVER_AUTHOR	"Linda Xie <lxie@us.ibm.com>"
+#define DRIVER_DESC	"RPA HOT Plug PCI Controller Driver"
+
+#define MAX_LOC_CODE 128
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, 0644);
+
+static int enable_slot(struct hotplug_slot *slot);
+static int disable_slot(struct hotplug_slot *slot);
+static int set_attention_status(struct hotplug_slot *slot, u8 value);
+static int get_power_status(struct hotplug_slot *slot, u8 * value);
+static int get_attention_status(struct hotplug_slot *slot, u8 * value);
+static int get_adapter_status(struct hotplug_slot *slot, u8 * value);
+static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value);
+
+struct hotplug_slot_ops rpaphp_hotplug_slot_ops = {
+	.owner = THIS_MODULE,
+	.enable_slot = enable_slot,
+	.disable_slot = disable_slot,
+	.set_attention_status = set_attention_status,
+	.get_power_status = get_power_status,
+	.get_attention_status = get_attention_status,
+	.get_adapter_status = get_adapter_status,
+	.get_max_bus_speed = get_max_bus_speed,
+};
+
+static int rpaphp_get_attention_status(struct slot *slot)
+{
+	return slot->hotplug_slot->info->attention_status;
+}
+
+/**
+ * set_attention_status - set attention LED
+ * echo 0 > attention -- set LED OFF
+ * echo 1 > attention -- set LED ON
+ * echo 2 > attention -- set LED ID(identify, light is blinking)
+ *
+ */
+static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
+{
+	int retval = 0;
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+
+	down(&rpaphp_sem);
+	switch (value) {
+	case 0:
+		retval = rpaphp_set_attention_status(slot, LED_OFF);
+		hotplug_slot->info->attention_status = 0;
+		break;
+	case 1:
+	default:
+		retval = rpaphp_set_attention_status(slot, LED_ON);
+		hotplug_slot->info->attention_status = 1;
+		break;
+	case 2:
+		retval = rpaphp_set_attention_status(slot, LED_ID);
+		hotplug_slot->info->attention_status = 2;
+		break;
+	}
+	up(&rpaphp_sem);
+	return retval;
+}
+
+/**
+ * get_power_status - get power status of a slot
+ * @hotplug_slot: slot to get status
+ * @value: pointer to store status
+ *
+ *
+ */
+static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
+{
+	int retval;
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+
+	down(&rpaphp_sem);
+	retval = rpaphp_get_power_status(slot, value);
+	up(&rpaphp_sem);
+	return retval;
+}
+
+/**
+ * get_attention_status - get attention LED status
+ *
+ *
+ */
+static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
+{
+	int retval = 0;
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+
+	down(&rpaphp_sem);
+	*value = rpaphp_get_attention_status(slot);
+	up(&rpaphp_sem);
+	return retval;
+}
+
+static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value)
+{
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+	int retval = 0;
+
+	down(&rpaphp_sem);
+	/*  have to go through this */
+	switch (slot->dev_type) {
+	case PCI_DEV:
+		retval = rpaphp_get_pci_adapter_status(slot, 0, value);
+		break;
+	case VIO_DEV:
+		retval = rpaphp_get_vio_adapter_status(slot, 0, value);
+		break;
+	default:
+		retval = -EINVAL;
+	}
+	up(&rpaphp_sem);
+	return retval;
+}
+
+static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
+{
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+
+	down(&rpaphp_sem);
+	switch (slot->type) {
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+	case 5:
+	case 6:
+		*value = PCI_SPEED_33MHz;	/* speed for case 1-6 */
+		break;
+	case 7:
+	case 8:
+		*value = PCI_SPEED_66MHz;
+		break;
+	case 11:
+	case 14:
+		*value = PCI_SPEED_66MHz_PCIX;
+		break;
+	case 12:
+	case 15:
+		*value = PCI_SPEED_100MHz_PCIX;
+		break;
+	case 13:
+	case 16:
+		*value = PCI_SPEED_133MHz_PCIX;
+		break;
+	default:
+		*value = PCI_SPEED_UNKNOWN;
+		break;
+
+	}
+	up(&rpaphp_sem);
+	return 0;
+}
+
+int rpaphp_remove_slot(struct slot *slot)
+{
+	return deregister_slot(slot);
+}
+
+static int get_children_props(struct device_node *dn, int **drc_indexes,
+		int **drc_names, int **drc_types, int **drc_power_domains)
+{
+	int *indexes, *names;
+	int *types, *domains;
+
+	indexes = (int *) get_property(dn, "ibm,drc-indexes", NULL);
+	names = (int *) get_property(dn, "ibm,drc-names", NULL);
+	types = (int *) get_property(dn, "ibm,drc-types", NULL);
+	domains = (int *) get_property(dn, "ibm,drc-power-domains", NULL);
+
+	if (!indexes || !names || !types || !domains) {
+		/* Slot does not have dynamically-removable children */
+		return -EINVAL;
+	}
+	if (drc_indexes)
+		*drc_indexes = indexes;
+	if (drc_names)
+		/* &drc_names[1] contains NULL terminated slot names */
+		*drc_names = names;
+	if (drc_types)
+		/* &drc_types[1] contains NULL terminated slot types */
+		*drc_types = types;
+	if (drc_power_domains)
+		*drc_power_domains = domains;
+
+	return 0;
+}
+
+/* To get the DRC props describing the current node, first obtain it's
+ * my-drc-index property.  Next obtain the DRC list from it's parent.  Use
+ * the my-drc-index for correlation, and obtain the requested properties.
+ */
+int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
+		char **drc_name, char **drc_type, int *drc_power_domain)
+{
+	int *indexes, *names;
+	int *types, *domains;
+	unsigned int *my_index;
+	char *name_tmp, *type_tmp;
+	int i, rc;
+
+	my_index = (int *) get_property(dn, "ibm,my-drc-index", NULL);
+	if (!my_index) {
+		/* Node isn't DLPAR/hotplug capable */
+		return -EINVAL;
+	}
+
+	rc = get_children_props(dn->parent, &indexes, &names, &types, &domains);
+	if (rc < 0) {
+		return -EINVAL;
+	}
+
+	name_tmp = (char *) &names[1];
+	type_tmp = (char *) &types[1];
+
+	/* Iterate through parent properties, looking for my-drc-index */
+	for (i = 0; i < indexes[0]; i++) {
+		if ((unsigned int) indexes[i + 1] == *my_index) {
+			if (drc_name)
+                		*drc_name = name_tmp;
+			if (drc_type)
+				*drc_type = type_tmp;
+			if (drc_index)
+				*drc_index = *my_index;
+			if (drc_power_domain)
+				*drc_power_domain = domains[i+1];
+			return 0;
+		}
+		name_tmp += (strlen(name_tmp) + 1);
+		type_tmp += (strlen(type_tmp) + 1);
+	}
+
+	return -EINVAL;
+}
+
+static int is_php_type(char *drc_type)
+{
+	unsigned long value;
+	char *endptr;
+
+	/* PCI Hotplug nodes have an integer for drc_type */
+	value = simple_strtoul(drc_type, &endptr, 10);
+	if (endptr == drc_type)
+		return 0;
+
+	return 1;
+}
+
+static int is_php_dn(struct device_node *dn, int **indexes, int **names,
+		int **types, int **power_domains)
+{
+	int *drc_types;
+	int rc;
+
+	rc = get_children_props(dn, indexes, names, &drc_types, power_domains);
+	if (rc >= 0) {
+		if (is_php_type((char *) &drc_types[1])) {
+			*types = drc_types;
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+static int is_dr_dn(struct device_node *dn, int **indexes, int **names,
+		int **types, int **power_domains, int **my_drc_index)
+{
+	int rc;
+
+	*my_drc_index = (int *) get_property(dn, "ibm,my-drc-index", NULL);
+	if(!*my_drc_index)
+		return (0);
+
+	if (!dn->parent)
+		return (0);
+
+	rc = get_children_props(dn->parent, indexes, names, types,
+				power_domains);
+	return (rc >= 0);
+}
+
+static inline int is_vdevice_root(struct device_node *dn)
+{
+	return !strcmp(dn->name, "vdevice");
+}
+
+int is_dlpar_type(const char *type_str)
+{
+	/* Only register DLPAR-capable nodes of drc-type PHB or SLOT */
+	return (!strcmp(type_str, "PHB") || !strcmp(type_str, "SLOT"));
+}
+
+/****************************************************************
+ *	rpaphp not only registers PCI hotplug slots(HOTPLUG), 
+ *	but also logical DR slots(EMBEDDED).
+ *	HOTPLUG slot: An adapter can be physically added/removed. 
+ *	EMBEDDED slot: An adapter can be logically removed/added
+ *		  from/to a partition with the slot.
+ ***************************************************************/
+int rpaphp_add_slot(struct device_node *dn)
+{
+	struct slot *slot;
+	int retval = 0;
+	int i, *my_drc_index, slot_type;
+	int *indexes, *names, *types, *power_domains;
+	char *name, *type;
+
+	dbg("Entry %s: dn->full_name=%s\n", __FUNCTION__, dn->full_name);
+
+	if (dn->parent && is_vdevice_root(dn->parent)) {
+		/* register a VIO device */
+		retval = register_vio_slot(dn);
+		goto exit;
+	}
+
+	/* register PCI devices */
+	if (dn->name != 0 && strcmp(dn->name, "pci") == 0) {
+		if (is_php_dn(dn, &indexes, &names, &types, &power_domains))  
+			slot_type = HOTPLUG;
+		else if (is_dr_dn(dn, &indexes, &names, &types, &power_domains, &my_drc_index)) 
+			slot_type = EMBEDDED;
+		else goto exit;
+
+		name = (char *) &names[1];
+		type = (char *) &types[1];
+		for (i = 0; i < indexes[0]; i++,
+	     		name += (strlen(name) + 1), type += (strlen(type) + 1)) {
+
+			if (slot_type == HOTPLUG ||
+			    (slot_type == EMBEDDED &&
+			     indexes[i + 1] == my_drc_index[0] &&
+			     is_dlpar_type(type))) {
+				if (!(slot = alloc_slot_struct(dn, indexes[i + 1], name,
+					       power_domains[i + 1]))) {
+					retval = -ENOMEM;
+					goto exit;
+				}
+				if (!strcmp(type, "PHB"))
+					slot->type = PHB;
+				else if (slot_type == EMBEDDED)
+					slot->type = EMBEDDED;
+				else
+					slot->type = simple_strtoul(type, NULL, 10);
+				
+				dbg("    Found drc-index:0x%x drc-name:%s drc-type:%s\n",
+					indexes[i + 1], name, type);
+
+				retval = register_pci_slot(slot);
+				if (slot_type == EMBEDDED)
+					goto exit;
+			}
+		}
+	}
+exit:
+	dbg("%s - Exit: num_slots=%d rc[%d]\n",
+	    __FUNCTION__, num_slots, retval);
+	return retval;
+}
+
+/*
+ * init_slots - initialize 'struct slot' structures for each slot
+ *
+ */
+static void init_slots(void)
+{
+	struct device_node *dn;
+
+	for (dn = find_all_nodes(); dn; dn = dn->next)
+		rpaphp_add_slot(dn);
+}
+
+static int __init init_rpa(void)
+{
+
+	init_MUTEX(&rpaphp_sem);
+
+	/* initialize internal data structure etc. */
+	init_slots();
+	if (!num_slots)
+		return -ENODEV;
+
+	return 0;
+}
+
+static void __exit cleanup_slots(void)
+{
+	struct list_head *tmp, *n;
+	struct slot *slot;
+
+	/*
+	 * Unregister all of our slots with the pci_hotplug subsystem,
+	 * and free up all memory that we had allocated.
+	 * memory will be freed in release_slot callback. 
+	 */
+
+	list_for_each_safe(tmp, n, &rpaphp_slot_head) {
+		slot = list_entry(tmp, struct slot, rpaphp_slot_list);
+		list_del(&slot->rpaphp_slot_list);
+		pci_hp_deregister(slot->hotplug_slot);
+	}
+	return;
+}
+
+static int __init rpaphp_init(void)
+{
+	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+
+	/* read all the PRA info from the system */
+	return init_rpa();
+}
+
+static void __exit rpaphp_exit(void)
+{
+	cleanup_slots();
+}
+
+static int enable_slot(struct hotplug_slot *hotplug_slot)
+{
+	int retval = 0;
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+
+	if (slot->state == CONFIGURED) {
+		dbg("%s: %s is already enabled\n", __FUNCTION__, slot->name);
+		goto exit;
+	}
+
+	dbg("ENABLING SLOT %s\n", slot->name);
+	down(&rpaphp_sem);
+	switch (slot->dev_type) {
+	case PCI_DEV:
+		retval = rpaphp_enable_pci_slot(slot);
+		break;
+	case VIO_DEV:
+		retval = rpaphp_enable_vio_slot(slot);
+		break;
+	default:
+		retval = -EINVAL;
+	}
+	up(&rpaphp_sem);
+exit:
+	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+	return retval;
+}
+
+static int disable_slot(struct hotplug_slot *hotplug_slot)
+{
+	int retval = -EINVAL;
+	struct slot *slot = (struct slot *)hotplug_slot->private;
+
+	dbg("%s - Entry: slot[%s]\n", __FUNCTION__, slot->name);
+
+	if (slot->state == NOT_CONFIGURED) {
+		dbg("%s: %s is already disabled\n", __FUNCTION__, slot->name);
+		goto exit;
+	}
+
+	dbg("DISABLING SLOT %s\n", slot->name);
+	down(&rpaphp_sem);
+	switch (slot->dev_type) {
+	case PCI_DEV:
+		retval = rpaphp_unconfig_pci_adapter(slot);
+		break;
+	case VIO_DEV:
+		retval = rpaphp_unconfig_vio_adapter(slot);
+		break;
+	default:
+		retval = -ENODEV;
+	}
+	up(&rpaphp_sem);
+exit:
+	dbg("%s - Exit: rc[%d]\n", __FUNCTION__, retval);
+	return retval;
+}
+
+module_init(rpaphp_init);
+module_exit(rpaphp_exit);
+
+EXPORT_SYMBOL_GPL(rpaphp_add_slot);
+EXPORT_SYMBOL_GPL(rpaphp_remove_slot);
+EXPORT_SYMBOL_GPL(rpaphp_slot_head);
+EXPORT_SYMBOL_GPL(rpaphp_get_drc_props);