1 2 /* 3 * IBM ASM Service Processor Device Driver 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 * 19 * Copyright (C) IBM Corporation, 2004 20 * 21 * Author: Max Asb�ck <amax@us.ibm.com> 22 * 23 * This driver is based on code originally written by Pete Reynolds 24 * and others. 25 * 26 */ 27 28 /* 29 * The ASM device driver does the following things: 30 * 31 * 1) When loaded it sends a message to the service processor, 32 * indicating that an OS is * running. This causes the service processor 33 * to send periodic heartbeats to the OS. 34 * 35 * 2) Answers the periodic heartbeats sent by the service processor. 36 * Failure to do so would result in system reboot. 37 * 38 * 3) Acts as a pass through for dot commands sent from user applications. 39 * The interface for this is the ibmasmfs file system. 40 * 41 * 4) Allows user applications to register for event notification. Events 42 * are sent to the driver through interrupts. They can be read from user 43 * space through the ibmasmfs file system. 44 * 45 * 5) Allows user space applications to send heartbeats to the service 46 * processor (aka reverse heartbeats). Again this happens through ibmasmfs. 47 * 48 * 6) Handles remote mouse and keyboard event interrupts and makes them 49 * available to user applications through ibmasmfs. 50 * 51 */ 52 53 #include <linux/pci.h> 54 #include <linux/init.h> 55 #include "ibmasm.h" 56 #include "lowlevel.h" 57 #include "remote.h" 58 59 60 static int __devinit ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 61 { 62 int err, result = -ENOMEM; 63 struct service_processor *sp; 64 65 if ((err = pci_enable_device(pdev))) { 66 printk(KERN_ERR "%s: can't enable PCI device at %s\n", 67 DRIVER_NAME, pci_name(pdev)); 68 return err; 69 } 70 71 sp = kmalloc(sizeof(struct service_processor), GFP_KERNEL); 72 if (sp == NULL) { 73 dev_err(&pdev->dev, "Failed to allocate memory\n"); 74 result = -ENOMEM; 75 goto error_kmalloc; 76 } 77 memset(sp, 0, sizeof(struct service_processor)); 78 79 pci_set_drvdata(pdev, (void *)sp); 80 sp->dev = &pdev->dev; 81 sp->number = pdev->bus->number; 82 snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number); 83 snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number); 84 85 if (ibmasm_event_buffer_init(sp)) { 86 dev_err(sp->dev, "Failed to allocate event buffer\n"); 87 goto error_eventbuffer; 88 } 89 90 if (ibmasm_heartbeat_init(sp)) { 91 dev_err(sp->dev, "Failed to allocate heartbeat command\n"); 92 goto error_heartbeat; 93 } 94 95 sp->irq = pdev->irq; 96 sp->base_address = ioremap(pci_resource_start(pdev, 0), 97 pci_resource_len(pdev, 0)); 98 if (sp->base_address == 0) { 99 dev_err(sp->dev, "Failed to ioremap pci memory\n"); 100 result = -ENODEV; 101 goto error_ioremap; 102 } 103 104 result = ibmasm_init_remote_queue(sp); 105 if (result) { 106 dev_err(sp->dev, "Failed to initialize remote queue\n"); 107 goto error_remote_queue; 108 } 109 110 spin_lock_init(&sp->lock); 111 INIT_LIST_HEAD(&sp->command_queue); 112 113 result = request_irq(sp->irq, ibmasm_interrupt_handler, SA_SHIRQ, sp->devname, (void*)sp); 114 if (result) { 115 dev_err(sp->dev, "Failed to register interrupt handler\n"); 116 goto error_request_irq; 117 } 118 119 enable_sp_interrupts(sp->base_address); 120 disable_mouse_interrupts(sp); 121 122 result = ibmasm_send_driver_vpd(sp); 123 if (result) { 124 dev_err(sp->dev, "Failed to send driver VPD to service processor\n"); 125 goto error_send_message; 126 } 127 result = ibmasm_send_os_state(sp, SYSTEM_STATE_OS_UP); 128 if (result) { 129 dev_err(sp->dev, "Failed to send OS state to service processor\n"); 130 goto error_send_message; 131 } 132 ibmasmfs_add_sp(sp); 133 134 ibmasm_register_uart(sp); 135 136 dev_printk(KERN_DEBUG, &pdev->dev, "WARNING: This software may not be supported or function\n"); 137 dev_printk(KERN_DEBUG, &pdev->dev, "correctly on your IBM server. Please consult the IBM\n"); 138 dev_printk(KERN_DEBUG, &pdev->dev, "ServerProven website\n"); 139 dev_printk(KERN_DEBUG, &pdev->dev, "http://www.pc.ibm.com/ww/eserver/xseries/serverproven\n"); 140 dev_printk(KERN_DEBUG, &pdev->dev, "for information on the specific driver level and support\n"); 141 dev_printk(KERN_DEBUG, &pdev->dev, "statement for your IBM server.\n"); 142 143 return 0; 144 145 error_send_message: 146 disable_sp_interrupts(sp->base_address); 147 free_irq(sp->irq, (void *)sp); 148 error_request_irq: 149 ibmasm_free_remote_queue(sp); 150 error_remote_queue: 151 iounmap(sp->base_address); 152 error_ioremap: 153 ibmasm_heartbeat_exit(sp); 154 error_heartbeat: 155 ibmasm_event_buffer_exit(sp); 156 error_eventbuffer: 157 kfree(sp); 158 error_kmalloc: 159 pci_disable_device(pdev); 160 161 return result; 162 } 163 164 static void __devexit ibmasm_remove_one(struct pci_dev *pdev) 165 { 166 struct service_processor *sp = (struct service_processor *)pci_get_drvdata(pdev); 167 168 ibmasm_unregister_uart(sp); 169 ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN); 170 disable_sp_interrupts(sp->base_address); 171 disable_mouse_interrupts(sp); 172 free_irq(sp->irq, (void *)sp); 173 ibmasm_heartbeat_exit(sp); 174 ibmasm_free_remote_queue(sp); 175 iounmap(sp->base_address); 176 ibmasm_event_buffer_exit(sp); 177 kfree(sp); 178 pci_disable_device(pdev); 179 } 180 181 static struct pci_device_id ibmasm_pci_table[] = 182 { 183 { PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) }, 184 {}, 185 }; 186 187 static struct pci_driver ibmasm_driver = { 188 .name = DRIVER_NAME, 189 .id_table = ibmasm_pci_table, 190 .probe = ibmasm_init_one, 191 .remove = __devexit_p(ibmasm_remove_one), 192 }; 193 194 static void __exit ibmasm_exit (void) 195 { 196 ibmasm_unregister_panic_notifier(); 197 ibmasmfs_unregister(); 198 pci_unregister_driver(&ibmasm_driver); 199 info(DRIVER_DESC " version " DRIVER_VERSION " unloaded"); 200 } 201 202 static int __init ibmasm_init(void) 203 { 204 int result; 205 206 result = ibmasmfs_register(); 207 if (result) { 208 err("Failed to register ibmasmfs file system"); 209 return result; 210 } 211 result = pci_register_driver(&ibmasm_driver); 212 if (result) { 213 ibmasmfs_unregister(); 214 return result; 215 } 216 ibmasm_register_panic_notifier(); 217 info(DRIVER_DESC " version " DRIVER_VERSION " loaded"); 218 return 0; 219 } 220 221 module_init(ibmasm_init); 222 module_exit(ibmasm_exit); 223 224 MODULE_AUTHOR(DRIVER_AUTHOR); 225 MODULE_DESCRIPTION(DRIVER_DESC); 226 MODULE_LICENSE("GPL"); 227 MODULE_DEVICE_TABLE(pci, ibmasm_pci_table); 228 229