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/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 219