| |
| /* |
| * 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 <linux/slab.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 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 = kzalloc(sizeof(struct service_processor), GFP_KERNEL); |
| if (sp == NULL) { |
| dev_err(&pdev->dev, "Failed to allocate memory\n"); |
| result = -ENOMEM; |
| goto error_kmalloc; |
| } |
| |
| 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 = pci_ioremap_bar(pdev, 0); |
| if (!sp->base_address) { |
| 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 = 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 = pci_register_driver(&ibmasm_driver); |
| if (result) |
| return result; |
| |
| result = ibmasmfs_register(); |
| if (result) { |
| pci_unregister_driver(&ibmasm_driver); |
| err("Failed to register ibmasmfs file system"); |
| 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); |
| |