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 Asb�ck <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 220