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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 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 <linux/slab.h>
56#include "ibmasm.h"
57#include "lowlevel.h"
58#include "remote.h"
59
60int ibmasm_debug = 0;
61module_param(ibmasm_debug, int , S_IRUGO | S_IWUSR);
62MODULE_PARM_DESC(ibmasm_debug, " Set debug mode on or off");
63
64
65static int ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
66{
67 int result;
68 struct service_processor *sp;
69
70 if ((result = pci_enable_device(pdev))) {
71 dev_err(&pdev->dev, "Failed to enable PCI device\n");
72 return result;
73 }
74 if ((result = pci_request_regions(pdev, DRIVER_NAME))) {
75 dev_err(&pdev->dev, "Failed to allocate PCI resources\n");
76 goto error_resources;
77 }
78 /* vnc client won't work without bus-mastering */
79 pci_set_master(pdev);
80
81 sp = kzalloc(sizeof(struct service_processor), GFP_KERNEL);
82 if (sp == NULL) {
83 dev_err(&pdev->dev, "Failed to allocate memory\n");
84 result = -ENOMEM;
85 goto error_kmalloc;
86 }
87
88 spin_lock_init(&sp->lock);
89 INIT_LIST_HEAD(&sp->command_queue);
90
91 pci_set_drvdata(pdev, (void *)sp);
92 sp->dev = &pdev->dev;
93 sp->number = pdev->bus->number;
94 snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number);
95 snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number);
96
97 if (ibmasm_event_buffer_init(sp)) {
98 dev_err(sp->dev, "Failed to allocate event buffer\n");
99 goto error_eventbuffer;
100 }
101
102 if (ibmasm_heartbeat_init(sp)) {
103 dev_err(sp->dev, "Failed to allocate heartbeat command\n");
104 goto error_heartbeat;
105 }
106
107 sp->irq = pdev->irq;
108 sp->base_address = pci_ioremap_bar(pdev, 0);
109 if (!sp->base_address) {
110 dev_err(sp->dev, "Failed to ioremap pci memory\n");
111 result = -ENODEV;
112 goto error_ioremap;
113 }
114
115 result = request_irq(sp->irq, ibmasm_interrupt_handler, IRQF_SHARED, sp->devname, (void*)sp);
116 if (result) {
117 dev_err(sp->dev, "Failed to register interrupt handler\n");
118 goto error_request_irq;
119 }
120
121 enable_sp_interrupts(sp->base_address);
122
123 result = ibmasm_init_remote_input_dev(sp);
124 if (result) {
125 dev_err(sp->dev, "Failed to initialize remote queue\n");
126 goto error_send_message;
127 }
128
129 result = ibmasm_send_driver_vpd(sp);
130 if (result) {
131 dev_err(sp->dev, "Failed to send driver VPD to service processor\n");
132 goto error_send_message;
133 }
134 result = ibmasm_send_os_state(sp, SYSTEM_STATE_OS_UP);
135 if (result) {
136 dev_err(sp->dev, "Failed to send OS state to service processor\n");
137 goto error_send_message;
138 }
139 ibmasmfs_add_sp(sp);
140
141 ibmasm_register_uart(sp);
142
143 return 0;
144
145error_send_message:
146 disable_sp_interrupts(sp->base_address);
147 ibmasm_free_remote_input_dev(sp);
148 free_irq(sp->irq, (void *)sp);
149error_request_irq:
150 iounmap(sp->base_address);
151error_ioremap:
152 ibmasm_heartbeat_exit(sp);
153error_heartbeat:
154 ibmasm_event_buffer_exit(sp);
155error_eventbuffer:
156 kfree(sp);
157error_kmalloc:
158 pci_release_regions(pdev);
159error_resources:
160 pci_disable_device(pdev);
161
162 return result;
163}
164
165static void ibmasm_remove_one(struct pci_dev *pdev)
166{
167 struct service_processor *sp = pci_get_drvdata(pdev);
168
169 dbg("Unregistering UART\n");
170 ibmasm_unregister_uart(sp);
171 dbg("Sending OS down message\n");
172 if (ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN))
173 err("failed to get repsonse to 'Send OS State' command\n");
174 dbg("Disabling heartbeats\n");
175 ibmasm_heartbeat_exit(sp);
176 dbg("Disabling interrupts\n");
177 disable_sp_interrupts(sp->base_address);
178 dbg("Freeing SP irq\n");
179 free_irq(sp->irq, (void *)sp);
180 dbg("Cleaning up\n");
181 ibmasm_free_remote_input_dev(sp);
182 iounmap(sp->base_address);
183 ibmasm_event_buffer_exit(sp);
184 kfree(sp);
185 pci_release_regions(pdev);
186 pci_disable_device(pdev);
187}
188
189static struct pci_device_id ibmasm_pci_table[] =
190{
191 { PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) },
192 {},
193};
194
195static struct pci_driver ibmasm_driver = {
196 .name = DRIVER_NAME,
197 .id_table = ibmasm_pci_table,
198 .probe = ibmasm_init_one,
199 .remove = ibmasm_remove_one,
200};
201
202static void __exit ibmasm_exit (void)
203{
204 ibmasm_unregister_panic_notifier();
205 ibmasmfs_unregister();
206 pci_unregister_driver(&ibmasm_driver);
207 info(DRIVER_DESC " version " DRIVER_VERSION " unloaded");
208}
209
210static int __init ibmasm_init(void)
211{
212 int result = pci_register_driver(&ibmasm_driver);
213 if (result)
214 return result;
215
216 result = ibmasmfs_register();
217 if (result) {
218 pci_unregister_driver(&ibmasm_driver);
219 err("Failed to register ibmasmfs file system");
220 return result;
221 }
222
223 ibmasm_register_panic_notifier();
224 info(DRIVER_DESC " version " DRIVER_VERSION " loaded");
225 return 0;
226}
227
228module_init(ibmasm_init);
229module_exit(ibmasm_exit);
230
231MODULE_AUTHOR(DRIVER_AUTHOR);
232MODULE_DESCRIPTION(DRIVER_DESC);
233MODULE_LICENSE("GPL");
234MODULE_DEVICE_TABLE(pci, ibmasm_pci_table);
235
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 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 <linux/slab.h>
56#include "ibmasm.h"
57#include "lowlevel.h"
58#include "remote.h"
59
60int ibmasm_debug = 0;
61module_param(ibmasm_debug, int , S_IRUGO | S_IWUSR);
62MODULE_PARM_DESC(ibmasm_debug, " Set debug mode on or off");
63
64
65static int __devinit ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
66{
67 int result;
68 struct service_processor *sp;
69
70 if ((result = pci_enable_device(pdev))) {
71 dev_err(&pdev->dev, "Failed to enable PCI device\n");
72 return result;
73 }
74 if ((result = pci_request_regions(pdev, DRIVER_NAME))) {
75 dev_err(&pdev->dev, "Failed to allocate PCI resources\n");
76 goto error_resources;
77 }
78 /* vnc client won't work without bus-mastering */
79 pci_set_master(pdev);
80
81 sp = kzalloc(sizeof(struct service_processor), GFP_KERNEL);
82 if (sp == NULL) {
83 dev_err(&pdev->dev, "Failed to allocate memory\n");
84 result = -ENOMEM;
85 goto error_kmalloc;
86 }
87
88 spin_lock_init(&sp->lock);
89 INIT_LIST_HEAD(&sp->command_queue);
90
91 pci_set_drvdata(pdev, (void *)sp);
92 sp->dev = &pdev->dev;
93 sp->number = pdev->bus->number;
94 snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number);
95 snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number);
96
97 if (ibmasm_event_buffer_init(sp)) {
98 dev_err(sp->dev, "Failed to allocate event buffer\n");
99 goto error_eventbuffer;
100 }
101
102 if (ibmasm_heartbeat_init(sp)) {
103 dev_err(sp->dev, "Failed to allocate heartbeat command\n");
104 goto error_heartbeat;
105 }
106
107 sp->irq = pdev->irq;
108 sp->base_address = pci_ioremap_bar(pdev, 0);
109 if (!sp->base_address) {
110 dev_err(sp->dev, "Failed to ioremap pci memory\n");
111 result = -ENODEV;
112 goto error_ioremap;
113 }
114
115 result = request_irq(sp->irq, ibmasm_interrupt_handler, IRQF_SHARED, sp->devname, (void*)sp);
116 if (result) {
117 dev_err(sp->dev, "Failed to register interrupt handler\n");
118 goto error_request_irq;
119 }
120
121 enable_sp_interrupts(sp->base_address);
122
123 result = ibmasm_init_remote_input_dev(sp);
124 if (result) {
125 dev_err(sp->dev, "Failed to initialize remote queue\n");
126 goto error_send_message;
127 }
128
129 result = ibmasm_send_driver_vpd(sp);
130 if (result) {
131 dev_err(sp->dev, "Failed to send driver VPD to service processor\n");
132 goto error_send_message;
133 }
134 result = ibmasm_send_os_state(sp, SYSTEM_STATE_OS_UP);
135 if (result) {
136 dev_err(sp->dev, "Failed to send OS state to service processor\n");
137 goto error_send_message;
138 }
139 ibmasmfs_add_sp(sp);
140
141 ibmasm_register_uart(sp);
142
143 return 0;
144
145error_send_message:
146 disable_sp_interrupts(sp->base_address);
147 ibmasm_free_remote_input_dev(sp);
148 free_irq(sp->irq, (void *)sp);
149error_request_irq:
150 iounmap(sp->base_address);
151error_ioremap:
152 ibmasm_heartbeat_exit(sp);
153error_heartbeat:
154 ibmasm_event_buffer_exit(sp);
155error_eventbuffer:
156 pci_set_drvdata(pdev, NULL);
157 kfree(sp);
158error_kmalloc:
159 pci_release_regions(pdev);
160error_resources:
161 pci_disable_device(pdev);
162
163 return result;
164}
165
166static void __devexit ibmasm_remove_one(struct pci_dev *pdev)
167{
168 struct service_processor *sp = (struct service_processor *)pci_get_drvdata(pdev);
169
170 dbg("Unregistering UART\n");
171 ibmasm_unregister_uart(sp);
172 dbg("Sending OS down message\n");
173 if (ibmasm_send_os_state(sp, SYSTEM_STATE_OS_DOWN))
174 err("failed to get repsonse to 'Send OS State' command\n");
175 dbg("Disabling heartbeats\n");
176 ibmasm_heartbeat_exit(sp);
177 dbg("Disabling interrupts\n");
178 disable_sp_interrupts(sp->base_address);
179 dbg("Freeing SP irq\n");
180 free_irq(sp->irq, (void *)sp);
181 dbg("Cleaning up\n");
182 ibmasm_free_remote_input_dev(sp);
183 iounmap(sp->base_address);
184 ibmasm_event_buffer_exit(sp);
185 pci_set_drvdata(pdev, NULL);
186 kfree(sp);
187 pci_release_regions(pdev);
188 pci_disable_device(pdev);
189}
190
191static struct pci_device_id ibmasm_pci_table[] =
192{
193 { PCI_DEVICE(VENDORID_IBM, DEVICEID_RSA) },
194 {},
195};
196
197static struct pci_driver ibmasm_driver = {
198 .name = DRIVER_NAME,
199 .id_table = ibmasm_pci_table,
200 .probe = ibmasm_init_one,
201 .remove = __devexit_p(ibmasm_remove_one),
202};
203
204static void __exit ibmasm_exit (void)
205{
206 ibmasm_unregister_panic_notifier();
207 ibmasmfs_unregister();
208 pci_unregister_driver(&ibmasm_driver);
209 info(DRIVER_DESC " version " DRIVER_VERSION " unloaded");
210}
211
212static int __init ibmasm_init(void)
213{
214 int result;
215
216 result = ibmasmfs_register();
217 if (result) {
218 err("Failed to register ibmasmfs file system");
219 return result;
220 }
221 result = pci_register_driver(&ibmasm_driver);
222 if (result) {
223 ibmasmfs_unregister();
224 return result;
225 }
226 ibmasm_register_panic_notifier();
227 info(DRIVER_DESC " version " DRIVER_VERSION " loaded");
228 return 0;
229}
230
231module_init(ibmasm_init);
232module_exit(ibmasm_exit);
233
234MODULE_AUTHOR(DRIVER_AUTHOR);
235MODULE_DESCRIPTION(DRIVER_DESC);
236MODULE_LICENSE("GPL");
237MODULE_DEVICE_TABLE(pci, ibmasm_pci_table);
238