Linux-2.6.12-rc2v2.6.12-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, 453 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
new file mode 100644
index 000000000000..4539e61a3dc1
--- /dev/null
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -0,0 +1,453 @@
+/*
+ * ACPI PCI Hot Plug Controller Driver
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001 IBM Corp.
+ * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
+ * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
+ * Copyright (C) 2002,2003 NEC Corporation
+ *
+ * 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 <gregkh@us.ibm.com>,
+ *		    <t-kochi@bq.jp.nec.com>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include "pci_hotplug.h"
+#include "acpiphp.h"
+
+static LIST_HEAD(slot_list);
+
+#define MY_NAME	"acpiphp"
+
+static int debug;
+int acpiphp_debug;
+
+/* local variables */
+static int num_slots;
+static struct acpiphp_attention_info *attention_info;
+
+#define DRIVER_VERSION	"0.4"
+#define DRIVER_AUTHOR	"Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>"
+#define DRIVER_DESC	"ACPI Hot Plug PCI Controller Driver"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
+module_param(debug, bool, 0644);
+
+/* export the attention callback registration methods */
+EXPORT_SYMBOL_GPL(acpiphp_register_attention);
+EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
+
+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_address		(struct hotplug_slot *slot, u32 *value);
+static int get_latch_status	(struct hotplug_slot *slot, u8 *value);
+static int get_adapter_status	(struct hotplug_slot *slot, u8 *value);
+
+static struct hotplug_slot_ops acpi_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_latch_status	= get_latch_status,
+	.get_adapter_status	= get_adapter_status,
+	.get_address		= get_address,
+};
+
+
+/**
+ * acpiphp_register_attention - set attention LED callback
+ * @info: must be completely filled with LED callbacks
+ *
+ * Description: this is used to register a hardware specific ACPI
+ * driver that manipulates the attention LED.  All the fields in
+ * info must be set.
+ **/
+int acpiphp_register_attention(struct acpiphp_attention_info *info)
+{
+	int retval = -EINVAL;
+
+	if (info && info->owner && info->set_attn &&
+			info->get_attn && !attention_info) {
+		retval = 0;
+		attention_info = info;
+	}
+	return retval;
+}
+
+
+/**
+ * acpiphp_unregister_attention - unset attention LED callback
+ * @info: must match the pointer used to register
+ *
+ * Description: this is used to un-register a hardware specific acpi
+ * driver that manipulates the attention LED.  The pointer to the 
+ * info struct must be the same as the one used to set it.
+ **/
+int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
+{
+	int retval = -EINVAL;
+
+	if (info && attention_info == info) {
+		attention_info = NULL;
+		retval = 0;
+	}
+	return retval;
+}
+
+
+/**
+ * enable_slot - power on and enable a slot
+ * @hotplug_slot: slot to enable
+ *
+ * Actual tasks are done in acpiphp_enable_slot()
+ *
+ */
+static int enable_slot(struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	/* enable the specified slot */
+	return acpiphp_enable_slot(slot->acpi_slot);
+}
+
+
+/**
+ * disable_slot - disable and power off a slot
+ * @hotplug_slot: slot to disable
+ *
+ * Actual tasks are done in acpiphp_disable_slot()
+ *
+ */
+static int disable_slot(struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	/* disable the specified slot */
+	return acpiphp_disable_slot(slot->acpi_slot);
+}
+
+
+ /**
+  * set_attention_status - set attention LED
+ * @hotplug_slot: slot to set attention LED on
+ * @status: value to set attention LED to (0 or 1)
+ *
+ * attention status LED, so we use a callback that
+ * was registered with us.  This allows hardware specific
+ * ACPI implementations to blink the light for us.
+ **/
+ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
+ {
+	int retval = -ENODEV;
+
+ 	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+ 
+	if (attention_info && try_module_get(attention_info->owner)) {
+		retval = attention_info->set_attn(hotplug_slot, status);
+		module_put(attention_info->owner);
+	} else
+		attention_info = NULL;
+	return retval;
+ }
+ 
+
+/**
+ * get_power_status - get power status of a slot
+ * @hotplug_slot: slot to get status
+ * @value: pointer to store status
+ *
+ * Some platforms may not implement _STA method properly.
+ * In that case, the value returned may not be reliable.
+ *
+ */
+static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	*value = acpiphp_get_power_status(slot->acpi_slot);
+
+	return 0;
+}
+
+
+ /**
+ * get_attention_status - get attention LED status
+ * @hotplug_slot: slot to get status from
+ * @value: returns with value of attention LED
+ *
+ * ACPI doesn't have known method to determine the state
+ * of the attention status LED, so we use a callback that
+ * was registered with us.  This allows hardware specific
+ * ACPI implementations to determine its state
+ **/
+static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	int retval = -EINVAL;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	if (attention_info && try_module_get(attention_info->owner)) {
+		retval = attention_info->get_attn(hotplug_slot, value);
+		module_put(attention_info->owner);
+	} else
+		attention_info = NULL;
+	return retval;
+}
+
+
+/**
+ * get_latch_status - get latch status of a slot
+ * @hotplug_slot: slot to get status
+ * @value: pointer to store status
+ *
+ * ACPI doesn't provide any formal means to access latch status.
+ * Instead, we fake latch status from _STA
+ *
+ */
+static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	*value = acpiphp_get_latch_status(slot->acpi_slot);
+
+	return 0;
+}
+
+
+/**
+ * get_adapter_status - get adapter status of a slot
+ * @hotplug_slot: slot to get status
+ * @value: pointer to store status
+ *
+ * ACPI doesn't provide any formal means to access adapter status.
+ * Instead, we fake adapter status from _STA
+ *
+ */
+static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	*value = acpiphp_get_adapter_status(slot->acpi_slot);
+
+	return 0;
+}
+
+
+/**
+ * get_address - get pci address of a slot
+ * @hotplug_slot: slot to get status
+ * @busdev: pointer to struct pci_busdev (seg, bus, dev)
+ *
+ */
+static int get_address(struct hotplug_slot *hotplug_slot, u32 *value)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	*value = acpiphp_get_address(slot->acpi_slot);
+
+	return 0;
+}
+
+static int __init init_acpi(void)
+{
+	int retval;
+
+	/* initialize internal data structure etc. */
+	retval = acpiphp_glue_init();
+
+	/* read initial number of slots */
+	if (!retval) {
+		num_slots = acpiphp_get_num_slots();
+		if (num_slots == 0)
+			retval = -ENODEV;
+	}
+
+	return retval;
+}
+
+
+/**
+ * make_slot_name - make a slot name that appears in pcihpfs
+ * @slot: slot to name
+ *
+ */
+static void make_slot_name(struct slot *slot)
+{
+	snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%u",
+		 slot->acpi_slot->sun);
+}
+
+/**
+ * release_slot - free up the memory used by a slot
+ * @hotplug_slot: slot to free
+ */
+static void release_slot(struct hotplug_slot *hotplug_slot)
+{
+	struct slot *slot = hotplug_slot->private;
+
+	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+	kfree(slot->hotplug_slot->info);
+	kfree(slot->hotplug_slot->name);
+	kfree(slot->hotplug_slot);
+	kfree(slot);
+}
+
+/**
+ * init_slots - initialize 'struct slot' structures for each slot
+ *
+ */
+static int __init init_slots(void)
+{
+	struct slot *slot;
+	int retval = -ENOMEM;
+	int i;
+
+	for (i = 0; i < num_slots; ++i) {
+		slot = kmalloc(sizeof(struct slot), GFP_KERNEL);
+		if (!slot)
+			goto error;
+		memset(slot, 0, sizeof(struct slot));
+
+		slot->hotplug_slot = kmalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
+		if (!slot->hotplug_slot)
+			goto error_slot;
+		memset(slot->hotplug_slot, 0, sizeof(struct hotplug_slot));
+
+		slot->hotplug_slot->info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
+		if (!slot->hotplug_slot->info)
+			goto error_hpslot;
+		memset(slot->hotplug_slot->info, 0, sizeof(struct hotplug_slot_info));
+
+		slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
+		if (!slot->hotplug_slot->name)
+			goto error_info;
+
+		slot->number = i;
+
+		slot->hotplug_slot->private = slot;
+		slot->hotplug_slot->release = &release_slot;
+		slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
+
+		slot->acpi_slot = get_slot_from_id(i);
+		slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
+		slot->hotplug_slot->info->attention_status = 0;
+		slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
+		slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
+		slot->hotplug_slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
+		slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
+
+		make_slot_name(slot);
+
+		retval = pci_hp_register(slot->hotplug_slot);
+		if (retval) {
+			err("pci_hp_register failed with error %d\n", retval);
+			goto error_name;
+		}
+
+		/* add slot to our internal list */
+		list_add(&slot->slot_list, &slot_list);
+		info("Slot [%s] registered\n", slot->hotplug_slot->name);
+	}
+
+	return 0;
+error_name:
+	kfree(slot->hotplug_slot->name);
+error_info:
+	kfree(slot->hotplug_slot->info);
+error_hpslot:
+	kfree(slot->hotplug_slot);
+error_slot:
+	kfree(slot);
+error:
+	return retval;
+}
+
+
+static void __exit cleanup_slots (void)
+{
+	struct list_head *tmp, *n;
+	struct slot *slot;
+
+	list_for_each_safe (tmp, n, &slot_list) {
+		/* memory will be freed in release_slot callback */
+		slot = list_entry(tmp, struct slot, slot_list);
+		list_del(&slot->slot_list);
+		pci_hp_deregister(slot->hotplug_slot);
+	}
+}
+
+
+static int __init acpiphp_init(void)
+{
+	int retval;
+
+	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+
+	acpiphp_debug = debug;
+
+	/* read all the ACPI info from the system */
+	retval = init_acpi();
+	if (retval)
+		return retval;
+
+	return init_slots();
+}
+
+
+static void __exit acpiphp_exit(void)
+{
+	cleanup_slots();
+	/* deallocate internal data structures etc. */
+	acpiphp_glue_exit();
+}
+
+module_init(acpiphp_init);
+module_exit(acpiphp_exit);