419 lines
11 KiB
C
419 lines
11 KiB
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 <linux/workqueue.h>
|
|
#include "shpchp.h"
|
|
|
|
/* Global variables */
|
|
int shpchp_debug;
|
|
int shpchp_poll_mode;
|
|
int shpchp_poll_time;
|
|
struct workqueue_struct *shpchp_wq;
|
|
|
|
#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 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);
|
|
kfree(slot);
|
|
}
|
|
|
|
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;
|
|
int retval = -ENOMEM;
|
|
int i;
|
|
|
|
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;
|
|
|
|
hotplug_slot->name = slot->name;
|
|
|
|
slot->hp_slot = i;
|
|
slot->ctrl = ctrl;
|
|
slot->bus = ctrl->pci_dev->subordinate->number;
|
|
slot->device = ctrl->slot_device_offset + i;
|
|
slot->hpc_ops = ctrl->hpc_ops;
|
|
slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);
|
|
mutex_init(&slot->lock);
|
|
INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);
|
|
|
|
/* 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_info;
|
|
}
|
|
|
|
list_add(&slot->slot_list, &ctrl->slot_list);
|
|
}
|
|
|
|
return 0;
|
|
error_info:
|
|
kfree(info);
|
|
error_hpslot:
|
|
kfree(hotplug_slot);
|
|
error_slot:
|
|
kfree(slot);
|
|
error:
|
|
return retval;
|
|
}
|
|
|
|
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);
|
|
cancel_delayed_work(&slot->work);
|
|
flush_scheduled_work();
|
|
flush_workqueue(shpchp_wq);
|
|
pci_hp_deregister(slot->hotplug_slot);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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);
|
|
|
|
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
|
|
|
|
return shpchp_sysfs_enable_slot(slot);
|
|
}
|
|
|
|
static int disable_slot (struct hotplug_slot *hotplug_slot)
|
|
{
|
|
struct slot *slot = get_slot(hotplug_slot);
|
|
|
|
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
|
|
|
|
return shpchp_sysfs_disable_slot(slot);
|
|
}
|
|
|
|
static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
|
|
{
|
|
struct slot *slot = get_slot(hotplug_slot);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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;
|
|
|
|
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);
|
|
|
|
/* Setup the slot information structures */
|
|
rc = init_slots(ctrl);
|
|
if (rc) {
|
|
err("%s: slot initialization failed\n", SHPC_MODULE_NAME);
|
|
goto err_out_release_ctlr;
|
|
}
|
|
|
|
rc = shpchp_create_ctrl_files(ctrl);
|
|
if (rc)
|
|
goto err_cleanup_slots;
|
|
|
|
return 0;
|
|
|
|
err_cleanup_slots:
|
|
cleanup_slots(ctrl);
|
|
err_out_release_ctlr:
|
|
ctrl->hpc_ops->release_ctlr(ctrl);
|
|
err_out_free_ctrl:
|
|
kfree(ctrl);
|
|
err_out_none:
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void shpc_remove(struct pci_dev *dev)
|
|
{
|
|
struct controller *ctrl = pci_get_drvdata(dev);
|
|
|
|
shpchp_remove_ctrl_files(ctrl);
|
|
ctrl->hpc_ops->release_ctlr(ctrl);
|
|
kfree(ctrl);
|
|
}
|
|
|
|
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,
|
|
};
|
|
|
|
static int __init shpcd_init(void)
|
|
{
|
|
int retval = 0;
|
|
|
|
retval = pci_register_driver(&shpc_driver);
|
|
dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval);
|
|
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
|
|
return retval;
|
|
}
|
|
|
|
static void __exit shpcd_cleanup(void)
|
|
{
|
|
dbg("unload_shpchpd()\n");
|
|
pci_unregister_driver(&shpc_driver);
|
|
info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
|
|
}
|
|
|
|
module_init(shpcd_init);
|
|
module_exit(shpcd_cleanup);
|