blob: 777432ae764aadeadfb645967d687e4309b18400 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001
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 Asböck <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
60static 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
145error_send_message:
146 disable_sp_interrupts(sp->base_address);
147 free_irq(sp->irq, (void *)sp);
148error_request_irq:
149 ibmasm_free_remote_queue(sp);
150error_remote_queue:
151 iounmap(sp->base_address);
152error_ioremap:
153 ibmasm_heartbeat_exit(sp);
154error_heartbeat:
155 ibmasm_event_buffer_exit(sp);
156error_eventbuffer:
157 kfree(sp);
158error_kmalloc:
159 pci_disable_device(pdev);
160
161 return result;
162}
163
164static 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
181static struct pci_device_id ibmasm_pci_table[] =
182{
183 { PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) },
184 {},
185};
186
187static 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
194static 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
202static 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
221module_init(ibmasm_init);
222module_exit(ibmasm_exit);
223
224MODULE_AUTHOR(DRIVER_AUTHOR);
225MODULE_DESCRIPTION(DRIVER_DESC);
226MODULE_LICENSE("GPL");
227MODULE_DEVICE_TABLE(pci, ibmasm_pci_table);
228