![Thomas Gleixner](/assets/img/avatar_default.png)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
240 lines
6.5 KiB
C
240 lines
6.5 KiB
C
|
|
/*
|
|
* IBM ASM Service Processor Device Driver
|
|
*
|
|
* 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. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) IBM Corporation, 2004
|
|
*
|
|
* Author: Max Asböck <amax@us.ibm.com>
|
|
*
|
|
* This driver is based on code originally written by Pete Reynolds
|
|
* and others.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* The ASM device driver does the following things:
|
|
*
|
|
* 1) When loaded it sends a message to the service processor,
|
|
* indicating that an OS is * running. This causes the service processor
|
|
* to send periodic heartbeats to the OS.
|
|
*
|
|
* 2) Answers the periodic heartbeats sent by the service processor.
|
|
* Failure to do so would result in system reboot.
|
|
*
|
|
* 3) Acts as a pass through for dot commands sent from user applications.
|
|
* The interface for this is the ibmasmfs file system.
|
|
*
|
|
* 4) Allows user applications to register for event notification. Events
|
|
* are sent to the driver through interrupts. They can be read from user
|
|
* space through the ibmasmfs file system.
|
|
*
|
|
* 5) Allows user space applications to send heartbeats to the service
|
|
* processor (aka reverse heartbeats). Again this happens through ibmasmfs.
|
|
*
|
|
* 6) Handles remote mouse and keyboard event interrupts and makes them
|
|
* available to user applications through ibmasmfs.
|
|
*
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include "ibmasm.h"
|
|
#include "lowlevel.h"
|
|
#include "remote.h"
|
|
|
|
int ibmasm_debug = 0;
|
|
module_param(ibmasm_debug, int , S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(ibmasm_debug, " Set debug mode on or off");
|
|
|
|
|
|
static int __devinit ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
|
|
int result;
|
|
struct service_processor *sp;
|
|
|
|
if ((result = pci_enable_device(pdev))) {
|
|
dev_err(&pdev->dev, "Failed to enable PCI device\n");
|
|
return result;
|
|
}
|
|
if ((result = pci_request_regions(pdev, DRIVER_NAME))) {
|
|
dev_err(&pdev->dev, "Failed to allocate PCI resources\n");
|
|
goto error_resources;
|
|
}
|
|
/* vnc client won't work without bus-mastering */
|
|
pci_set_master(pdev);
|
|
|
|
sp = kmalloc(sizeof(struct service_processor), GFP_KERNEL);
|
|
if (sp == NULL) {
|
|
dev_err(&pdev->dev, "Failed to allocate memory\n");
|
|
result = -ENOMEM;
|
|
goto error_kmalloc;
|
|
}
|
|
memset(sp, 0, sizeof(struct service_processor));
|
|
|
|
spin_lock_init(&sp->lock);
|
|
INIT_LIST_HEAD(&sp->command_queue);
|
|
|
|
pci_set_drvdata(pdev, (void *)sp);
|
|
sp->dev = &pdev->dev;
|
|
sp->number = pdev->bus->number;
|
|
snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number);
|
|
snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number);
|
|
|
|
if (ibmasm_event_buffer_init(sp)) {
|
|
dev_err(sp->dev, "Failed to allocate event buffer\n");
|
|
goto error_eventbuffer;
|
|
}
|
|
|
|
if (ibmasm_heartbeat_init(sp)) {
|
|
dev_err(sp->dev, "Failed to allocate heartbeat command\n");
|
|
goto error_heartbeat;
|
|
}
|
|
|
|
sp->irq = pdev->irq;
|
|
sp->base_address = ioremap(pci_resource_start(pdev, 0),
|
|
pci_resource_len(pdev, 0));
|
|
if (sp->base_address == 0) {
|
|
dev_err(sp->dev, "Failed to ioremap pci memory\n");
|
|
result = -ENODEV;
|
|
goto error_ioremap;
|
|
}
|
|
|
|
result = request_irq(sp->irq, ibmasm_interrupt_handler, IRQF_SHARED, sp->devname, (void*)sp);
|
|
if (result) {
|
|
dev_err(sp->dev, "Failed to register interrupt handler\n");
|
|
goto error_request_irq;
|
|
}
|
|
|
|
enable_sp_interrupts(sp->base_address);
|
|
|
|
result = ibmasm_init_remote_input_dev(sp);
|
|
if (result) {
|
|
dev_err(sp->dev, "Failed to initialize remote queue\n");
|
|
goto error_send_message;
|
|
}
|
|
|
|
result = ibmasm_send_driver_vpd(sp);
|
|
if (result) {
|
|
dev_err(sp->dev, "Failed to send driver VPD to service processor\n");
|
|
goto error_send_message;
|
|
}
|
|
result = ibmasm_send_os_state(sp, SYSTEM_STATE_OS_UP);
|
|
if (result) {
|
|
dev_err(sp->dev, "Failed to send OS state to service processor\n");
|
|
goto error_send_message;
|
|
}
|
|
ibmasmfs_add_sp(sp);
|
|
|
|
ibmasm_register_uart(sp);
|
|
|
|
return 0;
|
|
|
|
error_send_message:
|
|
disable_sp_interrupts(sp->base_address);
|
|
ibmasm_free_remote_input_dev(sp);
|
|
free_irq(sp->irq, (void *)sp);
|
|
error_request_irq:
|
|
iounmap(sp->base_address);
|
|
error_ioremap:
|
|
ibmasm_heartbeat_exit(sp);
|
|
error_heartbeat:
|
|
ibmasm_event_buffer_exit(sp);
|
|
error_eventbuffer:
|
|
pci_set_drvdata(pdev, NULL);
|
|
kfree(sp);
|
|
error_kmalloc:
|
|
pci_release_regions(pdev);
|
|
error_resources:
|
|
pci_disable_device(pdev);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void __devexit ibmasm_remove_one(struct pci_dev *pdev)
|
|
{
|
|
struct service_processor *sp = (struct service_processor *)pci_get_drvdata(pdev);
|
|
|
|
dbg("Unregistering UART\n");
|
|
ibmasm_unregister_uart(sp);
|
|
dbg("Sending OS down message\n");
|
|
if (ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN))
|
|
err("failed to get repsonse to 'Send OS State' command\n");
|
|
dbg("Disabling heartbeats\n");
|
|
ibmasm_heartbeat_exit(sp);
|
|
dbg("Disabling interrupts\n");
|
|
disable_sp_interrupts(sp->base_address);
|
|
dbg("Freeing SP irq\n");
|
|
free_irq(sp->irq, (void *)sp);
|
|
dbg("Cleaning up\n");
|
|
ibmasm_free_remote_input_dev(sp);
|
|
iounmap(sp->base_address);
|
|
ibmasm_event_buffer_exit(sp);
|
|
pci_set_drvdata(pdev, NULL);
|
|
kfree(sp);
|
|
pci_release_regions(pdev);
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
static struct pci_device_id ibmasm_pci_table[] =
|
|
{
|
|
{ PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) },
|
|
{},
|
|
};
|
|
|
|
static struct pci_driver ibmasm_driver = {
|
|
.name = DRIVER_NAME,
|
|
.id_table = ibmasm_pci_table,
|
|
.probe = ibmasm_init_one,
|
|
.remove = __devexit_p(ibmasm_remove_one),
|
|
};
|
|
|
|
static void __exit ibmasm_exit (void)
|
|
{
|
|
ibmasm_unregister_panic_notifier();
|
|
ibmasmfs_unregister();
|
|
pci_unregister_driver(&ibmasm_driver);
|
|
info(DRIVER_DESC " version " DRIVER_VERSION " unloaded");
|
|
}
|
|
|
|
static int __init ibmasm_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = ibmasmfs_register();
|
|
if (result) {
|
|
err("Failed to register ibmasmfs file system");
|
|
return result;
|
|
}
|
|
result = pci_register_driver(&ibmasm_driver);
|
|
if (result) {
|
|
ibmasmfs_unregister();
|
|
return result;
|
|
}
|
|
ibmasm_register_panic_notifier();
|
|
info(DRIVER_DESC " version " DRIVER_VERSION " loaded");
|
|
return 0;
|
|
}
|
|
|
|
module_init(ibmasm_init);
|
|
module_exit(ibmasm_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, ibmasm_pci_table);
|
|
|