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