Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff
[linux-2.6.git] / drivers / misc / ibmasm / ibmasm.h
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  */
24
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/errno.h>
28 #include <linux/list.h>
29 #include <linux/wait.h>
30 #include <linux/spinlock.h>
31 #include <linux/slab.h>
32 #include <linux/config.h>
33 #include <linux/module.h>
34 #include <linux/interrupt.h>
35 #include <linux/device.h>
36 #include <linux/input.h>
37
38 /* Driver identification */
39 #define DRIVER_NAME     "ibmasm"
40 #define DRIVER_VERSION  "1.0"
41 #define DRIVER_AUTHOR   "Max Asbock <masbock@us.ibm.com>, Vernon Mauery <vernux@us.ibm.com>"
42 #define DRIVER_DESC     "IBM ASM Service Processor Driver"
43
44 #define err(msg) printk(KERN_ERR "%s: " msg "\n", DRIVER_NAME)
45 #define info(msg) printk(KERN_INFO "%s: " msg "\n", DRIVER_NAME)
46
47 extern int ibmasm_debug;
48 #define dbg(STR, ARGS...)                                       \
49         do {                                                    \
50                 if (ibmasm_debug)                               \
51                         printk(KERN_DEBUG STR , ##ARGS);        \
52         } while (0)
53
54 static inline char *get_timestamp(char *buf)
55 {
56         struct timeval now;
57         do_gettimeofday(&now);
58         sprintf(buf, "%lu.%lu", now.tv_sec, now.tv_usec);
59         return buf;
60 }
61
62 #define IBMASM_CMD_PENDING      0       
63 #define IBMASM_CMD_COMPLETE     1       
64 #define IBMASM_CMD_FAILED       2
65
66 #define IBMASM_CMD_TIMEOUT_NORMAL       45
67 #define IBMASM_CMD_TIMEOUT_EXTRA        240
68
69 #define IBMASM_CMD_MAX_BUFFER_SIZE      0x8000
70
71 #define REVERSE_HEARTBEAT_TIMEOUT       120
72
73 #define HEARTBEAT_BUFFER_SIZE           0x400
74
75 #ifdef IA64
76 #define IBMASM_DRIVER_VPD "Lin64 6.08      "
77 #else
78 #define IBMASM_DRIVER_VPD "Lin32 6.08      "
79 #endif
80
81 #define SYSTEM_STATE_OS_UP      5
82 #define SYSTEM_STATE_OS_DOWN    4
83
84 #define IBMASM_NAME_SIZE        16
85
86 #define IBMASM_NUM_EVENTS       10
87 #define IBMASM_EVENT_MAX_SIZE   2048u
88
89
90 struct command {
91         struct list_head        queue_node;
92         wait_queue_head_t       wait;
93         unsigned char           *buffer;
94         size_t                  buffer_size;
95         int                     status;
96         struct kobject          kobj;
97         spinlock_t              *lock;
98 };
99 #define to_command(c) container_of(c, struct command, kobj)
100
101 static inline void command_put(struct command *cmd)
102 {
103         unsigned long flags;
104         spinlock_t *lock = cmd->lock;
105
106         spin_lock_irqsave(lock, flags);
107         kobject_put(&cmd->kobj);
108         spin_unlock_irqrestore(lock, flags);
109 }
110
111 static inline void command_get(struct command *cmd)
112 {
113         kobject_get(&cmd->kobj);
114 }
115
116
117 struct ibmasm_event {
118         unsigned int    serial_number;
119         unsigned int    data_size;
120         unsigned char   data[IBMASM_EVENT_MAX_SIZE];
121 };
122
123 struct event_buffer {
124         struct ibmasm_event     events[IBMASM_NUM_EVENTS];
125         unsigned int            next_serial_number;
126         unsigned int            next_index;
127         struct list_head        readers;
128 };
129
130 struct event_reader {
131         int                     cancelled;
132         unsigned int            next_serial_number;
133         wait_queue_head_t       wait;
134         struct list_head        node;
135         unsigned int            data_size;
136         unsigned char           data[IBMASM_EVENT_MAX_SIZE];
137 };
138
139 struct reverse_heartbeat {
140         wait_queue_head_t       wait;
141         unsigned int            stopped;
142 };
143
144 struct ibmasm_remote {
145         struct input_dev *keybd_dev;
146         struct input_dev *mouse_dev;
147 };
148
149 struct service_processor {
150         struct list_head        node;
151         spinlock_t              lock;
152         void __iomem            *base_address;
153         unsigned int            irq;
154         struct command          *current_command;
155         struct command          *heartbeat;
156         struct list_head        command_queue;
157         struct event_buffer     *event_buffer;
158         char                    dirname[IBMASM_NAME_SIZE];
159         char                    devname[IBMASM_NAME_SIZE];
160         unsigned int            number;
161         struct ibmasm_remote    remote;
162         int                     serial_line;
163         struct device           *dev;
164 };
165
166 /* command processing */
167 extern struct command *ibmasm_new_command(struct service_processor *sp, size_t buffer_size);
168 extern void ibmasm_exec_command(struct service_processor *sp, struct command *cmd);
169 extern void ibmasm_wait_for_response(struct command *cmd, int timeout);
170 extern void ibmasm_receive_command_response(struct service_processor *sp, void *response,  size_t size);
171
172 /* event processing */
173 extern int ibmasm_event_buffer_init(struct service_processor *sp);
174 extern void ibmasm_event_buffer_exit(struct service_processor *sp);
175 extern void ibmasm_receive_event(struct service_processor *sp, void *data,  unsigned int data_size);
176 extern void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader);
177 extern void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader);
178 extern int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader);
179 extern void ibmasm_cancel_next_event(struct event_reader *reader);
180
181 /* heartbeat - from SP to OS */
182 extern void ibmasm_register_panic_notifier(void);
183 extern void ibmasm_unregister_panic_notifier(void);
184 extern int ibmasm_heartbeat_init(struct service_processor *sp);
185 extern void ibmasm_heartbeat_exit(struct service_processor *sp);
186 extern void ibmasm_receive_heartbeat(struct service_processor *sp,  void *message, size_t size);
187
188 /* reverse heartbeat - from OS to SP */
189 extern void ibmasm_init_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
190 extern int ibmasm_start_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
191 extern void ibmasm_stop_reverse_heartbeat(struct reverse_heartbeat *rhb);
192
193 /* dot commands */
194 extern void ibmasm_receive_message(struct service_processor *sp, void *data, int data_size);
195 extern int ibmasm_send_driver_vpd(struct service_processor *sp);
196 extern int ibmasm_send_os_state(struct service_processor *sp, int os_state);
197
198 /* low level message processing */
199 extern int ibmasm_send_i2o_message(struct service_processor *sp);
200 extern irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id, struct pt_regs *regs);
201
202 /* remote console */
203 extern void ibmasm_handle_mouse_interrupt(struct service_processor *sp, struct pt_regs *regs);
204 extern int ibmasm_init_remote_input_dev(struct service_processor *sp);
205 extern void ibmasm_free_remote_input_dev(struct service_processor *sp);
206
207 /* file system */
208 extern int ibmasmfs_register(void);
209 extern void ibmasmfs_unregister(void);
210 extern void ibmasmfs_add_sp(struct service_processor *sp);
211
212 /* uart */
213 #ifdef CONFIG_SERIAL_8250
214 extern void ibmasm_register_uart(struct service_processor *sp);
215 extern void ibmasm_unregister_uart(struct service_processor *sp);
216 #else
217 #define ibmasm_register_uart(sp)        do { } while(0)
218 #define ibmasm_unregister_uart(sp)      do { } while(0)
219 #endif