[deliverable/linux.git] / drivers / pci / hotplug / shpchp_core.c

/*
 * Standard 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) 2003-2004 Intel 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 <greg@kroah.com>, <kristen.c.accardi@intel.com>
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "shpchp.h"

/* Global variables */
int shpchp_debug;
int shpchp_poll_mode;
int shpchp_poll_time;
LIST_HEAD(shpchp_ctrl_list);

#define DRIVER_VERSION	"0.4"
#define DRIVER_AUTHOR	"Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
#define DRIVER_DESC	"Standard Hot Plug PCI Controller Driver"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

module_param(shpchp_debug, bool, 0644);
module_param(shpchp_poll_mode, bool, 0644);
module_param(shpchp_poll_time, int, 0644);
MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");

#define SHPC_MODULE_NAME "shpchp"

static int shpc_start_thread (void);
static int set_attention_status (struct hotplug_slot *slot, u8 value);
static int enable_slot		(struct hotplug_slot *slot);
static int disable_slot		(struct hotplug_slot *slot);
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_latch_status	(struct hotplug_slot *slot, u8 *value);
static int get_adapter_status	(struct hotplug_slot *slot, u8 *value);
static int get_address		(struct hotplug_slot *slot, u32 *value);
static int get_max_bus_speed	(struct hotplug_slot *slot, enum pci_bus_speed *value);
static int get_cur_bus_speed	(struct hotplug_slot *slot, enum pci_bus_speed *value);

static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
	.owner =		THIS_MODULE,
	.set_attention_status =	set_attention_status,
	.enable_slot =		enable_slot,
	.disable_slot =		disable_slot,
	.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,
	.get_max_bus_speed =	get_max_bus_speed,
	.get_cur_bus_speed =	get_cur_bus_speed,
};

/**
 * 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);
}

#define SLOT_NAME_SIZE 10
static void make_slot_name(struct slot *slot)
{
	snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%04d_%04d",
		 slot->bus, slot->number);
}

static int init_slots(struct controller *ctrl)
{
	struct slot *slot;
	struct hotplug_slot *hotplug_slot;
	struct hotplug_slot_info *info;
	char *name;
	int retval = -ENOMEM;
	int i;
	u32 sun;

	for (i = 0; i < ctrl->num_slots; i++) {
		slot = kzalloc(sizeof(*slot), GFP_KERNEL);
		if (!slot)
			goto error;

		hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
		if (!hotplug_slot)
			goto error_slot;
		slot->hotplug_slot = hotplug_slot;

		info = kzalloc(sizeof(*info), GFP_KERNEL);
		if (!info)
			goto error_hpslot;
		hotplug_slot->info = info;

		name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
		if (!name)
			goto error_info;
		hotplug_slot->name = name;

		slot->hp_slot = i;
		slot->magic = SLOT_MAGIC;
		slot->ctrl = ctrl;
		slot->bus = ctrl->slot_bus;
		slot->device = ctrl->slot_device_offset + i;
		slot->hpc_ops = ctrl->hpc_ops;

		if (shpchprm_get_physical_slot_number(ctrl, &sun,
						      slot->bus, slot->device))
			goto error_name;

		slot->number = sun;

		/* register this slot with the hotplug pci core */
		hotplug_slot->private = slot;
		hotplug_slot->release = &release_slot;
		make_slot_name(slot);
		hotplug_slot->ops = &shpchp_hotplug_slot_ops;

		get_power_status(hotplug_slot, &info->power_status);
		get_attention_status(hotplug_slot, &info->attention_status);
		get_latch_status(hotplug_slot, &info->latch_status);
		get_adapter_status(hotplug_slot, &info->adapter_status);

		dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
		    "slot_device_offset=%x\n", slot->bus, slot->device,
		    slot->hp_slot, slot->number, ctrl->slot_device_offset);
		retval = pci_hp_register(slot->hotplug_slot);
		if (retval) {
			err("pci_hp_register failed with error %d\n", retval);
			goto error_name;
		}

		list_add(&slot->slot_list, &ctrl->slot_list);
	}

	return 0;
error_name:
	kfree(name);
error_info:
	kfree(info);
error_hpslot:
	kfree(hotplug_slot);
error_slot:
	kfree(slot);
error:
	return retval;
}

static void cleanup_slots(struct controller *ctrl)
{
	struct list_head *tmp;
	struct list_head *next;
	struct slot *slot;

	list_for_each_safe(tmp, next, &ctrl->slot_list) {
		slot = list_entry(tmp, struct slot, slot_list);
		list_del(&slot->slot_list);
		pci_hp_deregister(slot->hotplug_slot);
	}
}

static int get_ctlr_slot_config(struct controller *ctrl)
{
	int num_ctlr_slots;
	int first_device_num;
	int physical_slot_num;
	int updown;
	int rc;
	int flags;

	rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots,
				       &first_device_num, &physical_slot_num,
				       &updown, &flags);
	if (rc) {
		err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n",
		    __FUNCTION__, ctrl->bus, ctrl->device);
		return -1;
	}

	ctrl->num_slots = num_ctlr_slots;
	ctrl->slot_device_offset = first_device_num;
	ctrl->first_slot = physical_slot_num;
	ctrl->slot_num_inc = updown;		/* either -1 or 1 */

	dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d "
	    "(%x:%x)\n", __FUNCTION__, num_ctlr_slots, first_device_num,
	    physical_slot_num, updown, ctrl->bus, ctrl->device);

	return 0;
}

/*
 * set_attention_status - Turns the Amber LED for a slot on, off or blink
 */
static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	hotplug_slot->info->attention_status = status;
	slot->hpc_ops->set_attention_status(slot, status);

	return 0;
}

static int enable_slot (struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	return shpchp_enable_slot(slot);
}

static int disable_slot (struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	return shpchp_disable_slot(slot);
}

static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_power_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->power_status;

	return 0;
}

static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_attention_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->attention_status;

	return 0;
}

static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_latch_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->latch_status;

	return 0;
}

static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_adapter_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->adapter_status;

	return 0;
}

static int get_address (struct hotplug_slot *hotplug_slot, u32 *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	struct pci_bus *bus = slot->ctrl->pci_dev->subordinate;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	*value = (pci_domain_nr(bus) << 16) | (slot->bus << 8) | slot->device;

	return 0;
}

static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
{
	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
	int retval;

	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);

	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	if (retval < 0)
		*value = PCI_SPEED_UNKNOWN;

	return 0;
}

static int is_shpc_capable(struct pci_dev *dev)
{
       if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device ==
                               PCI_DEVICE_ID_AMD_GOLAM_7450))
               return 1;
       if (pci_find_capability(dev, PCI_CAP_ID_SHPC))
               return 1;

       return 0;
}

static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int rc;
	struct controller *ctrl;
	struct slot *t_slot;
	int first_device_num;	/* first PCI device number */
	int num_ctlr_slots;	/* number of slots implemented */

	if (!is_shpc_capable(pdev))
		return -ENODEV;

	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
	if (!ctrl) {
		err("%s : out of memory\n", __FUNCTION__);
		goto err_out_none;
	}
	INIT_LIST_HEAD(&ctrl->slot_list);

	rc = shpc_init(ctrl, pdev);
	if (rc) {
		dbg("%s: controller initialization failed\n",
		    SHPC_MODULE_NAME);
		goto err_out_free_ctrl;
	}

	pci_set_drvdata(pdev, ctrl);

	ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
	if (!ctrl->pci_bus) {
		err("out of memory\n");
		rc = -ENOMEM;
		goto err_out_unmap_mmio_region;
	}

	memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus));
	ctrl->bus = pdev->bus->number;
	ctrl->slot_bus = pdev->subordinate->number;
	ctrl->device = PCI_SLOT(pdev->devfn);
	ctrl->function = PCI_FUNC(pdev->devfn);

	dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n",
	    ctrl->bus, ctrl->device, ctrl->function, pdev->irq);

	/*
	 * Save configuration headers for this and subordinate PCI buses
	 */
	rc = get_ctlr_slot_config(ctrl);
	if (rc) {
		err(msg_initialization_err, rc);
		goto err_out_free_ctrl_bus;
	}
	first_device_num = ctrl->slot_device_offset;
	num_ctlr_slots = ctrl->num_slots;

	ctrl->add_support = 1;

	/* Setup the slot information structures */
	rc = init_slots(ctrl);
	if (rc) {
		err(msg_initialization_err, 6);
		goto err_out_free_ctrl_slot;
	}

	/* Now hpc_functions (slot->hpc_ops->functions) are ready  */
	t_slot = shpchp_find_slot(ctrl, first_device_num);

	/* Check for operation bus speed */
	rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed);
	dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot);

	if (rc || ctrl->speed == PCI_SPEED_UNKNOWN) {
		err(SHPC_MODULE_NAME ": Can't get current bus speed. "
		    "Set to 33MHz PCI.\n");
		ctrl->speed = PCI_SPEED_33MHz;
	}

	/* Finish setting up the hot plug ctrl device */
	ctrl->next_event = 0;

	list_add(&ctrl->ctrl_list, &shpchp_ctrl_list);

	shpchp_create_ctrl_files(ctrl);

	return 0;

err_out_free_ctrl_slot:
	cleanup_slots(ctrl);
err_out_free_ctrl_bus:
	kfree(ctrl->pci_bus);
err_out_unmap_mmio_region:
	ctrl->hpc_ops->release_ctlr(ctrl);
err_out_free_ctrl:
	kfree(ctrl);
err_out_none:
	return -ENODEV;
}

static int shpc_start_thread(void)
{
	int retval = 0;

	dbg("Initialize + Start the notification/polling mechanism \n");

	retval = shpchp_event_start_thread();
	if (retval) {
		dbg("shpchp_event_start_thread() failed\n");
		return retval;
	}

	return retval;
}

static void __exit unload_shpchpd(void)
{
	struct list_head *tmp;
	struct list_head *next;
	struct controller *ctrl;

	list_for_each_safe(tmp, next, &shpchp_ctrl_list) {
		ctrl = list_entry(tmp, struct controller, ctrl_list);
		shpchp_remove_ctrl_files(ctrl);
		cleanup_slots(ctrl);
		kfree (ctrl->pci_bus);
		ctrl->hpc_ops->release_ctlr(ctrl);
		kfree(ctrl);
	}

	/* Stop the notification mechanism */
	shpchp_event_stop_thread();

}

static struct pci_device_id shpcd_pci_tbl[] = {
	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)},
	{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);

static struct pci_driver shpc_driver = {
	.name =		SHPC_MODULE_NAME,
	.id_table =	shpcd_pci_tbl,
	.probe =	shpc_probe,
	/* remove:	shpc_remove_one, */
};

static int __init shpcd_init(void)
{
	int retval = 0;

#ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
	shpchp_poll_mode = 1;
#endif

	retval = shpc_start_thread();
	if (retval)
		goto error_hpc_init;

	retval = pci_register_driver(&shpc_driver);
	dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval);
	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");

error_hpc_init:
	if (retval) {
		shpchp_event_stop_thread();
	}
	return retval;
}

static void __exit shpcd_cleanup(void)
{
	dbg("unload_shpchpd()\n");
	unload_shpchpd();

	pci_unregister_driver(&shpc_driver);

	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}

module_init(shpcd_init);
module_exit(shpcd_cleanup);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Standard Hot Plug Controller Driver
	3	*
	4	* Copyright (C) 1995,2001 Compaq Computer Corporation
	5	* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
	6	* Copyright (C) 2001 IBM Corp.
	7	* Copyright (C) 2003-2004 Intel Corporation
	8	*
	9	* All rights reserved.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or (at
	14	* your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	19	* NON INFRINGEMENT. See the GNU General Public License for more
	20	* details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	25	*
8cf4c195	26	* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
1da177e4 LT	27	*
	28	*/
	29
1da177e4 LT	30	#include <linux/module.h>
	31	#include <linux/moduleparam.h>
	32	#include <linux/kernel.h>
	33	#include <linux/types.h>
1da177e4	34	#include <linux/pci.h>
1da177e4	35	#include "shpchp.h"
1da177e4 LT	36
	37	/* Global variables */
	38	int shpchp_debug;
	39	int shpchp_poll_mode;
	40	int shpchp_poll_time;
a4534560	41	LIST_HEAD(shpchp_ctrl_list);
1da177e4 LT	42
	43	#define DRIVER_VERSION "0.4"
	44	#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
	45	#define DRIVER_DESC "Standard Hot Plug PCI Controller Driver"
	46
	47	MODULE_AUTHOR(DRIVER_AUTHOR);
	48	MODULE_DESCRIPTION(DRIVER_DESC);
	49	MODULE_LICENSE("GPL");
	50
	51	module_param(shpchp_debug, bool, 0644);
	52	module_param(shpchp_poll_mode, bool, 0644);
	53	module_param(shpchp_poll_time, int, 0644);
	54	MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
	55	MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
	56	MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");
	57
	58	#define SHPC_MODULE_NAME "shpchp"
	59
	60	static int shpc_start_thread (void);
	61	static int set_attention_status (struct hotplug_slot *slot, u8 value);
	62	static int enable_slot (struct hotplug_slot *slot);
	63	static int disable_slot (struct hotplug_slot *slot);
	64	static int get_power_status (struct hotplug_slot slot, u8 value);
	65	static int get_attention_status (struct hotplug_slot slot, u8 value);
	66	static int get_latch_status (struct hotplug_slot slot, u8 value);
	67	static int get_adapter_status (struct hotplug_slot slot, u8 value);
81f15442	68	static int get_address (struct hotplug_slot slot, u32 value);
1da177e4 LT	69	static int get_max_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	70	static int get_cur_bus_speed (struct hotplug_slot slot, enum pci_bus_speed value);
	71
	72	static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
	73	.owner = THIS_MODULE,
	74	.set_attention_status = set_attention_status,
	75	.enable_slot = enable_slot,
	76	.disable_slot = disable_slot,
	77	.get_power_status = get_power_status,
	78	.get_attention_status = get_attention_status,
	79	.get_latch_status = get_latch_status,
	80	.get_adapter_status = get_adapter_status,
81f15442	81	.get_address = get_address,
1da177e4 LT	82	.get_max_bus_speed = get_max_bus_speed,
	83	.get_cur_bus_speed = get_cur_bus_speed,
	84	};
	85
	86	/**
	87	* release_slot - free up the memory used by a slot
	88	* @hotplug_slot: slot to free
	89	*/
	90	static void release_slot(struct hotplug_slot *hotplug_slot)
	91	{
ee17fd93	92	struct slot *slot = hotplug_slot->private;
1da177e4 LT	93
	94	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	95
	96	kfree(slot->hotplug_slot->info);
	97	kfree(slot->hotplug_slot->name);
	98	kfree(slot->hotplug_slot);
	99	kfree(slot);
	100	}
	101
926030f6 KK	102	#define SLOT_NAME_SIZE 10
	103	static void make_slot_name(struct slot *slot)
	104	{
	105	snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%04d_%04d",
	106	slot->bus, slot->number);
	107	}
	108
1da177e4 LT	109	static int init_slots(struct controller *ctrl)
1da177e4 LT	110	{
926030f6 KK	111	struct slot *slot;
	112	struct hotplug_slot *hotplug_slot;
	113	struct hotplug_slot_info *info;
	114	char *name;
	115	int retval = -ENOMEM;
	116	int i;
	117	u32 sun;
	118
	119	for (i = 0; i < ctrl->num_slots; i++) {
57c95c0d	120	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
926030f6	121	if (!slot)
1da177e4 LT	122	goto error;
1da177e4 LT	123
57c95c0d	124	hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
926030f6	125	if (!hotplug_slot)
1da177e4	126	goto error_slot;
926030f6	127	slot->hotplug_slot = hotplug_slot;
1da177e4	128
57c95c0d	129	info = kzalloc(sizeof(*info), GFP_KERNEL);
926030f6	130	if (!info)
1da177e4	131	goto error_hpslot;
926030f6 KK	132	hotplug_slot->info = info;
	133
	134	name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
	135	if (!name)
1da177e4	136	goto error_info;
926030f6	137	hotplug_slot->name = name;
1da177e4	138
926030f6 KK	139	slot->hp_slot = i;
	140	slot->magic = SLOT_MAGIC;
	141	slot->ctrl = ctrl;
	142	slot->bus = ctrl->slot_bus;
	143	slot->device = ctrl->slot_device_offset + i;
	144	slot->hpc_ops = ctrl->hpc_ops;
1da177e4 LT	145
1da177e4 LT	146	if (shpchprm_get_physical_slot_number(ctrl, &sun,
926030f6	147	slot->bus, slot->device))
1da177e4 LT	148	goto error_name;
1da177e4 LT	149
926030f6	150	slot->number = sun;
1da177e4 LT	151
1da177e4 LT	152	/* register this slot with the hotplug pci core */
926030f6 KK	153	hotplug_slot->private = slot;
	154	hotplug_slot->release = &release_slot;
	155	make_slot_name(slot);
	156	hotplug_slot->ops = &shpchp_hotplug_slot_ops;
	157
	158	get_power_status(hotplug_slot, &info->power_status);
	159	get_attention_status(hotplug_slot, &info->attention_status);
	160	get_latch_status(hotplug_slot, &info->latch_status);
	161	get_adapter_status(hotplug_slot, &info->adapter_status);
	162
	163	dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
	164	"slot_device_offset=%x\n", slot->bus, slot->device,
	165	slot->hp_slot, slot->number, ctrl->slot_device_offset);
	166	retval = pci_hp_register(slot->hotplug_slot);
	167	if (retval) {
	168	err("pci_hp_register failed with error %d\n", retval);
1da177e4 LT	169	goto error_name;
	170	}
	171
5b1a960d	172	list_add(&slot->slot_list, &ctrl->slot_list);
1da177e4 LT	173	}
	174
	175	return 0;
1da177e4	176	error_name:
926030f6	177	kfree(name);
1da177e4	178	error_info:
926030f6	179	kfree(info);
1da177e4	180	error_hpslot:
926030f6	181	kfree(hotplug_slot);
1da177e4	182	error_slot:
926030f6	183	kfree(slot);
1da177e4	184	error:
926030f6	185	return retval;
1da177e4 LT	186	}
	187
	188	static void cleanup_slots(struct controller *ctrl)
	189	{
5b1a960d KK	190	struct list_head *tmp;
	191	struct list_head *next;
	192	struct slot *slot;
1da177e4	193
5b1a960d KK	194	list_for_each_safe(tmp, next, &ctrl->slot_list) {
	195	slot = list_entry(tmp, struct slot, slot_list);
	196	list_del(&slot->slot_list);
	197	pci_hp_deregister(slot->hotplug_slot);
1da177e4 LT	198	}
	199	}
	200
	201	static int get_ctlr_slot_config(struct controller *ctrl)
	202	{
	203	int num_ctlr_slots;
	204	int first_device_num;
	205	int physical_slot_num;
	206	int updown;
	207	int rc;
	208	int flags;
	209
dfcd5f68 KK	210	rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots,
	211	&first_device_num, &physical_slot_num,
	212	&updown, &flags);
1da177e4	213	if (rc) {
dfcd5f68 KK	214	err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n",
dfcd5f68 KK	215	__FUNCTION__, ctrl->bus, ctrl->device);
1da177e4 LT	216	return -1;
	217	}
	218
	219	ctrl->num_slots = num_ctlr_slots;
	220	ctrl->slot_device_offset = first_device_num;
	221	ctrl->first_slot = physical_slot_num;
	222	ctrl->slot_num_inc = updown; /* either -1 or 1 */
	223
dfcd5f68 KK	224	dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d "
	225	"(%x:%x)\n", __FUNCTION__, num_ctlr_slots, first_device_num,
	226	physical_slot_num, updown, ctrl->bus, ctrl->device);
1da177e4 LT	227
	228	return 0;
	229	}
	230
1da177e4 LT	231	/*
	232	* set_attention_status - Turns the Amber LED for a slot on, off or blink
	233	*/
	234	static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
	235	{
dfcd5f68	236	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	237
	238	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	239
	240	hotplug_slot->info->attention_status = status;
	241	slot->hpc_ops->set_attention_status(slot, status);
	242
	243	return 0;
	244	}
	245
1da177e4 LT	246	static int enable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	247	{
dfcd5f68	248	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	249
	250	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	251
	252	return shpchp_enable_slot(slot);
	253	}
	254
1da177e4 LT	255	static int disable_slot (struct hotplug_slot *hotplug_slot)
1da177e4 LT	256	{
dfcd5f68	257	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	258
	259	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	260
	261	return shpchp_disable_slot(slot);
	262	}
	263
	264	static int get_power_status (struct hotplug_slot hotplug_slot, u8 value)
	265	{
dfcd5f68	266	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	267	int retval;
	268
	269	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	270
	271	retval = slot->hpc_ops->get_power_status(slot, value);
	272	if (retval < 0)
	273	*value = hotplug_slot->info->power_status;
	274
	275	return 0;
	276	}
	277
	278	static int get_attention_status (struct hotplug_slot hotplug_slot, u8 value)
	279	{
dfcd5f68	280	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	281	int retval;
	282
	283	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	284
	285	retval = slot->hpc_ops->get_attention_status(slot, value);
	286	if (retval < 0)
	287	*value = hotplug_slot->info->attention_status;
	288
	289	return 0;
	290	}
	291
	292	static int get_latch_status (struct hotplug_slot hotplug_slot, u8 value)
	293	{
dfcd5f68	294	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	295	int retval;
	296
	297	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	298
	299	retval = slot->hpc_ops->get_latch_status(slot, value);
	300	if (retval < 0)
	301	*value = hotplug_slot->info->latch_status;
	302
	303	return 0;
	304	}
	305
	306	static int get_adapter_status (struct hotplug_slot hotplug_slot, u8 value)
	307	{
dfcd5f68	308	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	309	int retval;
	310
	311	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	312
	313	retval = slot->hpc_ops->get_adapter_status(slot, value);
	314	if (retval < 0)
	315	*value = hotplug_slot->info->adapter_status;
	316
	317	return 0;
	318	}
	319
81f15442 KK	320	static int get_address (struct hotplug_slot hotplug_slot, u32 value)
81f15442 KK	321	{
dfcd5f68	322	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
81f15442 KK	323	struct pci_bus *bus = slot->ctrl->pci_dev->subordinate;
	324
	325	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
	326
	327	*value = (pci_domain_nr(bus) << 16) \| (slot->bus << 8) \| slot->device;
	328
	329	return 0;
	330	}
	331
1da177e4 LT	332	static int get_max_bus_speed (struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
1da177e4 LT	333	{
dfcd5f68	334	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	335	int retval;
	336
	337	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
dfcd5f68	338
1da177e4 LT	339	retval = slot->hpc_ops->get_max_bus_speed(slot, value);
	340	if (retval < 0)
	341	*value = PCI_SPEED_UNKNOWN;
	342
	343	return 0;
	344	}
	345
	346	static int get_cur_bus_speed (struct hotplug_slot hotplug_slot, enum pci_bus_speed value)
	347	{
dfcd5f68	348	struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
1da177e4 LT	349	int retval;
	350
	351	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
dfcd5f68	352
1da177e4 LT	353	retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
	354	if (retval < 0)
	355	*value = PCI_SPEED_UNKNOWN;
	356
	357	return 0;
	358	}
	359
1410dc1c	360	static int is_shpc_capable(struct pci_dev *dev)
	361	{
	362	if ((dev->vendor == PCI_VENDOR_ID_AMD) \|\| (dev->device ==
	363	PCI_DEVICE_ID_AMD_GOLAM_7450))
	364	return 1;
	365	if (pci_find_capability(dev, PCI_CAP_ID_SHPC))
	366	return 1;
	367
	368	return 0;
	369	}
	370
1da177e4 LT	371	static int shpc_probe(struct pci_dev pdev, const struct pci_device_id ent)
	372	{
	373	int rc;
	374	struct controller *ctrl;
	375	struct slot *t_slot;
dfcd5f68 KK	376	int first_device_num; /* first PCI device number */
dfcd5f68 KK	377	int num_ctlr_slots; /* number of slots implemented */
1da177e4	378
1410dc1c	379	if (!is_shpc_capable(pdev))
	380	return -ENODEV;
	381
57c95c0d	382	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
1da177e4 LT	383	if (!ctrl) {
	384	err("%s : out of memory\n", __FUNCTION__);
	385	goto err_out_none;
	386	}
5b1a960d	387	INIT_LIST_HEAD(&ctrl->slot_list);
1da177e4	388
ee138334	389	rc = shpc_init(ctrl, pdev);
1da177e4	390	if (rc) {
dfcd5f68 KK	391	dbg("%s: controller initialization failed\n",
dfcd5f68 KK	392	SHPC_MODULE_NAME);
1da177e4 LT	393	goto err_out_free_ctrl;
	394	}
	395
1da177e4 LT	396	pci_set_drvdata(pdev, ctrl);
1da177e4 LT	397
57c95c0d	398	ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1da177e4 LT	399	if (!ctrl->pci_bus) {
	400	err("out of memory\n");
	401	rc = -ENOMEM;
	402	goto err_out_unmap_mmio_region;
	403	}
dfcd5f68	404
1da177e4 LT	405	memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus));
	406	ctrl->bus = pdev->bus->number;
	407	ctrl->slot_bus = pdev->subordinate->number;
1da177e4 LT	408	ctrl->device = PCI_SLOT(pdev->devfn);
1da177e4 LT	409	ctrl->function = PCI_FUNC(pdev->devfn);
dfcd5f68 KK	410
	411	dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n",
	412	ctrl->bus, ctrl->device, ctrl->function, pdev->irq);
1da177e4 LT	413
1da177e4 LT	414	/*
dfcd5f68	415	* Save configuration headers for this and subordinate PCI buses
1da177e4	416	*/
1da177e4 LT	417	rc = get_ctlr_slot_config(ctrl);
	418	if (rc) {
	419	err(msg_initialization_err, rc);
	420	goto err_out_free_ctrl_bus;
	421	}
	422	first_device_num = ctrl->slot_device_offset;
	423	num_ctlr_slots = ctrl->num_slots;
	424
dbd7a788	425	ctrl->add_support = 1;
dfcd5f68	426
1da177e4 LT	427	/* Setup the slot information structures */
	428	rc = init_slots(ctrl);
	429	if (rc) {
	430	err(msg_initialization_err, 6);
	431	goto err_out_free_ctrl_slot;
	432	}
	433
	434	/* Now hpc_functions (slot->hpc_ops->functions) are ready */
	435	t_slot = shpchp_find_slot(ctrl, first_device_num);
	436
	437	/* Check for operation bus speed */
	438	rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed);
	439	dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot);
	440
	441	if (rc \|\| ctrl->speed == PCI_SPEED_UNKNOWN) {
dfcd5f68 KK	442	err(SHPC_MODULE_NAME ": Can't get current bus speed. "
dfcd5f68 KK	443	"Set to 33MHz PCI.\n");
1da177e4 LT	444	ctrl->speed = PCI_SPEED_33MHz;
	445	}
	446
	447	/* Finish setting up the hot plug ctrl device */
	448	ctrl->next_event = 0;
	449
a4534560	450	list_add(&ctrl->ctrl_list, &shpchp_ctrl_list);
1da177e4 LT	451
	452	shpchp_create_ctrl_files(ctrl);
	453
	454	return 0;
	455
	456	err_out_free_ctrl_slot:
	457	cleanup_slots(ctrl);
	458	err_out_free_ctrl_bus:
	459	kfree(ctrl->pci_bus);
	460	err_out_unmap_mmio_region:
	461	ctrl->hpc_ops->release_ctlr(ctrl);
	462	err_out_free_ctrl:
	463	kfree(ctrl);
	464	err_out_none:
	465	return -ENODEV;
	466	}
	467
1da177e4 LT	468	static int shpc_start_thread(void)
1da177e4 LT	469	{
1da177e4	470	int retval = 0;
dfcd5f68	471
1da177e4 LT	472	dbg("Initialize + Start the notification/polling mechanism \n");
	473
	474	retval = shpchp_event_start_thread();
	475	if (retval) {
	476	dbg("shpchp_event_start_thread() failed\n");
	477	return retval;
	478	}
	479
1da177e4 LT	480	return retval;
	481	}
	482
1da177e4 LT	483	static void __exit unload_shpchpd(void)
1da177e4 LT	484	{
a4534560 KK	485	struct list_head *tmp;
a4534560 KK	486	struct list_head *next;
1da177e4	487	struct controller *ctrl;
1da177e4	488
a4534560 KK	489	list_for_each_safe(tmp, next, &shpchp_ctrl_list) {
a4534560 KK	490	ctrl = list_entry(tmp, struct controller, ctrl_list);
c2608a11	491	shpchp_remove_ctrl_files(ctrl);
1da177e4	492	cleanup_slots(ctrl);
1da177e4	493	kfree (ctrl->pci_bus);
1da177e4	494	ctrl->hpc_ops->release_ctlr(ctrl);
a4534560	495	kfree(ctrl);
1da177e4 LT	496	}
1da177e4 LT	497
1da177e4 LT	498	/* Stop the notification mechanism */
	499	shpchp_event_stop_thread();
	500
	501	}
	502
1da177e4	503	static struct pci_device_id shpcd_pci_tbl[] = {
dfcd5f68	504	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) \| 0x00), ~0)},
1da177e4 LT	505	{ /* end: all zeroes */ }
1da177e4 LT	506	};
1da177e4 LT	507	MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);
1da177e4 LT	508
1da177e4 LT	509	static struct pci_driver shpc_driver = {
	510	.name = SHPC_MODULE_NAME,
	511	.id_table = shpcd_pci_tbl,
	512	.probe = shpc_probe,
	513	/* remove: shpc_remove_one, */
	514	};
	515
1da177e4 LT	516	static int __init shpcd_init(void)
	517	{
	518	int retval = 0;
	519
	520	#ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
	521	shpchp_poll_mode = 1;
	522	#endif
	523
	524	retval = shpc_start_thread();
	525	if (retval)
	526	goto error_hpc_init;
	527
424600f9	528	retval = pci_register_driver(&shpc_driver);
	529	dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval);
	530	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1da177e4 LT	531
	532	error_hpc_init:
	533	if (retval) {
1da177e4	534	shpchp_event_stop_thread();
dbd7a788	535	}
1da177e4 LT	536	return retval;
	537	}
	538
	539	static void __exit shpcd_cleanup(void)
	540	{
	541	dbg("unload_shpchpd()\n");
	542	unload_shpchpd();
	543
1da177e4 LT	544	pci_unregister_driver(&shpc_driver);
	545
	546	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
	547	}
	548
	549	module_init(shpcd_init);
	550	module_exit(shpcd_cleanup);