[PATCH] ibmasm driver: correctly wake up sleeping threads
[pandora-kernel.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/version.h>
35 #include <linux/interrupt.h>
36 #include <linux/device.h>
37
38 /* Driver identification */
39 #define DRIVER_NAME     "ibmasm"
40 #define DRIVER_VERSION  "0.4"
41 #define DRIVER_AUTHOR   "Max Asbock"
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
48 #define IBMASM_CMD_PENDING      0       
49 #define IBMASM_CMD_COMPLETE     1       
50 #define IBMASM_CMD_FAILED       2
51
52 #define IBMASM_CMD_TIMEOUT_NORMAL       45
53 #define IBMASM_CMD_TIMEOUT_EXTRA        240
54
55 #define IBMASM_CMD_MAX_BUFFER_SIZE      0x8000
56
57 #define REVERSE_HEARTBEAT_TIMEOUT       120
58
59 #define HEARTBEAT_BUFFER_SIZE           0x400
60
61 #ifdef IA64
62 #define IBMASM_DRIVER_VPD "Lin64 6.08      "
63 #else
64 #define IBMASM_DRIVER_VPD "Lin32 6.08      "
65 #endif
66
67 #define SYSTEM_STATE_OS_UP      5
68 #define SYSTEM_STATE_OS_DOWN    4
69
70 #define IBMASM_NAME_SIZE        16
71
72 #define IBMASM_NUM_EVENTS       10
73 #define IBMASM_EVENT_MAX_SIZE   2048u
74
75
76 struct command {
77         struct list_head        queue_node;
78         wait_queue_head_t       wait;
79         unsigned char           *buffer;
80         size_t                  buffer_size;
81         int                     status;
82         struct kobject          kobj;
83 };
84 #define to_command(c) container_of(c, struct command, kobj)
85
86 static inline void command_put(struct command *cmd)
87 {
88         kobject_put(&cmd->kobj);
89 }
90
91 static inline void command_get(struct command *cmd)
92 {
93         kobject_get(&cmd->kobj);
94 }
95
96
97 struct ibmasm_event {
98         unsigned int    serial_number;
99         unsigned int    data_size;
100         unsigned char   data[IBMASM_EVENT_MAX_SIZE];
101 };
102
103 struct event_buffer {
104         struct ibmasm_event     events[IBMASM_NUM_EVENTS];
105         unsigned int            next_serial_number;
106         unsigned int            next_index;
107         struct list_head        readers;
108 };
109
110 struct event_reader {
111         int                     cancelled;
112         unsigned int            next_serial_number;
113         wait_queue_head_t       wait;
114         struct list_head        node;
115         unsigned int            data_size;
116         unsigned char           data[IBMASM_EVENT_MAX_SIZE];
117 };
118
119 struct reverse_heartbeat {
120         wait_queue_head_t       wait;
121         unsigned int            stopped;
122 };
123
124
125 /* remote console events */
126 struct mouse_event {
127         long            x;
128         long            y;
129         unsigned char   buttons;
130         unsigned char   transitions;
131 };
132
133 struct keyboard_event {
134         unsigned long   key_code;
135         unsigned char   key_down;
136 };
137
138 struct remote_event {
139         unsigned long   type;
140         union {
141                 struct mouse_event      mouse;
142                 struct keyboard_event   keyboard;
143         } data;
144 };
145
146 #define DRIVER_REMOTE_QUEUE_SIZE 240
147
148 struct remote_queue {
149         struct remote_event     *start;
150         struct remote_event     *end;
151         struct remote_event     *reader;
152         struct remote_event     *writer;
153         unsigned int            size;
154         int                     open;
155         wait_queue_head_t       wait;
156 };
157
158
159 struct service_processor {
160         struct list_head        node;
161         spinlock_t              lock;
162         void __iomem            *base_address;
163         unsigned int            irq;
164         struct command          *current_command;
165         struct command          *heartbeat;
166         struct list_head        command_queue;
167         struct event_buffer     *event_buffer;
168         char                    dirname[IBMASM_NAME_SIZE];
169         char                    devname[IBMASM_NAME_SIZE];
170         unsigned int            number;
171         struct remote_queue     remote_queue;
172         int                     serial_line;
173         struct device           *dev;
174 };
175
176 /* command processing */
177 extern struct command *ibmasm_new_command(size_t buffer_size);
178 extern void ibmasm_exec_command(struct service_processor *sp, struct command *cmd);
179 extern void ibmasm_wait_for_response(struct command *cmd, int timeout);
180 extern void ibmasm_receive_command_response(struct service_processor *sp, void *response,  size_t size);
181
182 /* event processing */
183 extern int ibmasm_event_buffer_init(struct service_processor *sp);
184 extern void ibmasm_event_buffer_exit(struct service_processor *sp);
185 extern void ibmasm_receive_event(struct service_processor *sp, void *data,  unsigned int data_size);
186 extern void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader);
187 extern void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader);
188 extern int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader);
189 extern void ibmasm_cancel_next_event(struct event_reader *reader);
190
191 /* heartbeat - from SP to OS */
192 extern void ibmasm_register_panic_notifier(void);
193 extern void ibmasm_unregister_panic_notifier(void);
194 extern int ibmasm_heartbeat_init(struct service_processor *sp);
195 extern void ibmasm_heartbeat_exit(struct service_processor *sp);
196 extern void ibmasm_receive_heartbeat(struct service_processor *sp,  void *message, size_t size);
197
198 /* reverse heartbeat - from OS to SP */
199 extern void ibmasm_init_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
200 extern int ibmasm_start_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
201 extern void ibmasm_stop_reverse_heartbeat(struct reverse_heartbeat *rhb);
202
203 /* dot commands */
204 extern void ibmasm_receive_message(struct service_processor *sp, void *data, int data_size);
205 extern int ibmasm_send_driver_vpd(struct service_processor *sp);
206 extern int ibmasm_send_os_state(struct service_processor *sp, int os_state);
207
208 /* low level message processing */
209 extern int ibmasm_send_i2o_message(struct service_processor *sp);
210 extern irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id, struct pt_regs *regs);
211
212 /* remote console */
213 extern void ibmasm_handle_mouse_interrupt(struct service_processor *sp);
214 extern int ibmasm_init_remote_queue(struct service_processor *sp);
215 extern void ibmasm_free_remote_queue(struct service_processor *sp);
216 extern void ibmasm_advance_reader(struct remote_queue *q, unsigned int n);
217 extern size_t ibmasm_events_available(struct remote_queue *q);
218
219 /* file system */
220 extern int ibmasmfs_register(void);
221 extern void ibmasmfs_unregister(void);
222 extern void ibmasmfs_add_sp(struct service_processor *sp);
223
224 /* uart */
225 #ifdef CONFIG_SERIAL_8250
226 extern void ibmasm_register_uart(struct service_processor *sp);
227 extern void ibmasm_unregister_uart(struct service_processor *sp);
228 #else
229 #define ibmasm_register_uart(sp)        do { } while(0)
230 #define ibmasm_unregister_uart(sp)      do { } while(0)
231 #endif