diff options
Diffstat (limited to 'drivers/misc/ibmasm/module.c')
| -rw-r--r-- | drivers/misc/ibmasm/module.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/drivers/misc/ibmasm/module.c b/drivers/misc/ibmasm/module.c new file mode 100644 index 00000000000..777432ae764 --- /dev/null +++ b/drivers/misc/ibmasm/module.c @@ -0,0 +1,228 @@ + +/* + * 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" + + +static int __devinit ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int err, result = -ENOMEM; + struct service_processor *sp; + + if ((err = pci_enable_device(pdev))) { + printk(KERN_ERR "%s: can't enable PCI device at %s\n", + DRIVER_NAME, pci_name(pdev)); + return err; + } + + 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)); + + 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 = ibmasm_init_remote_queue(sp); + if (result) { + dev_err(sp->dev, "Failed to initialize remote queue\n"); + goto error_remote_queue; + } + + spin_lock_init(&sp->lock); + INIT_LIST_HEAD(&sp->command_queue); + + result = request_irq(sp->irq, ibmasm_interrupt_handler, SA_SHIRQ, 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); + disable_mouse_interrupts(sp); + + 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); + + dev_printk(KERN_DEBUG, &pdev->dev, "WARNING: This software may not be supported or function\n"); + dev_printk(KERN_DEBUG, &pdev->dev, "correctly on your IBM server. Please consult the IBM\n"); + dev_printk(KERN_DEBUG, &pdev->dev, "ServerProven website\n"); + dev_printk(KERN_DEBUG, &pdev->dev, "http://www.pc.ibm.com/ww/eserver/xseries/serverproven\n"); + dev_printk(KERN_DEBUG, &pdev->dev, "for information on the specific driver level and support\n"); + dev_printk(KERN_DEBUG, &pdev->dev, "statement for your IBM server.\n"); + + return 0; + +error_send_message: + disable_sp_interrupts(sp->base_address); + free_irq(sp->irq, (void *)sp); +error_request_irq: + ibmasm_free_remote_queue(sp); +error_remote_queue: + iounmap(sp->base_address); +error_ioremap: + ibmasm_heartbeat_exit(sp); +error_heartbeat: + ibmasm_event_buffer_exit(sp); +error_eventbuffer: + kfree(sp); +error_kmalloc: + 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); + + ibmasm_unregister_uart(sp); + ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN); + disable_sp_interrupts(sp->base_address); + disable_mouse_interrupts(sp); + free_irq(sp->irq, (void *)sp); + ibmasm_heartbeat_exit(sp); + ibmasm_free_remote_queue(sp); + iounmap(sp->base_address); + ibmasm_event_buffer_exit(sp); + kfree(sp); + 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); + |