This source file includes following definitions.
- get_timestamp
- command_put
- command_get
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11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/errno.h>
14 #include <linux/list.h>
15 #include <linux/wait.h>
16 #include <linux/spinlock.h>
17 #include <linux/slab.h>
18 #include <linux/module.h>
19 #include <linux/interrupt.h>
20 #include <linux/kref.h>
21 #include <linux/device.h>
22 #include <linux/input.h>
23 #include <linux/time64.h>
24
25
26 #define DRIVER_NAME "ibmasm"
27 #define DRIVER_VERSION "1.0"
28 #define DRIVER_AUTHOR "Max Asbock <masbock@us.ibm.com>, Vernon Mauery <vernux@us.ibm.com>"
29 #define DRIVER_DESC "IBM ASM Service Processor Driver"
30
31 #define err(msg) printk(KERN_ERR "%s: " msg "\n", DRIVER_NAME)
32 #define info(msg) printk(KERN_INFO "%s: " msg "\n", DRIVER_NAME)
33
34 extern int ibmasm_debug;
35 #define dbg(STR, ARGS...) \
36 do { \
37 if (ibmasm_debug) \
38 printk(KERN_DEBUG STR , ##ARGS); \
39 } while (0)
40
41 static inline char *get_timestamp(char *buf)
42 {
43 struct timespec64 now;
44
45 ktime_get_real_ts64(&now);
46 sprintf(buf, "%llu.%.08lu", (long long)now.tv_sec,
47 now.tv_nsec / NSEC_PER_USEC);
48 return buf;
49 }
50
51 #define IBMASM_CMD_PENDING 0
52 #define IBMASM_CMD_COMPLETE 1
53 #define IBMASM_CMD_FAILED 2
54
55 #define IBMASM_CMD_TIMEOUT_NORMAL 45
56 #define IBMASM_CMD_TIMEOUT_EXTRA 240
57
58 #define IBMASM_CMD_MAX_BUFFER_SIZE 0x8000
59
60 #define REVERSE_HEARTBEAT_TIMEOUT 120
61
62 #define HEARTBEAT_BUFFER_SIZE 0x400
63
64 #ifdef IA64
65 #define IBMASM_DRIVER_VPD "Lin64 6.08 "
66 #else
67 #define IBMASM_DRIVER_VPD "Lin32 6.08 "
68 #endif
69
70 #define SYSTEM_STATE_OS_UP 5
71 #define SYSTEM_STATE_OS_DOWN 4
72
73 #define IBMASM_NAME_SIZE 16
74
75 #define IBMASM_NUM_EVENTS 10
76 #define IBMASM_EVENT_MAX_SIZE 2048u
77
78
79 struct command {
80 struct list_head queue_node;
81 wait_queue_head_t wait;
82 unsigned char *buffer;
83 size_t buffer_size;
84 int status;
85 struct kref kref;
86 spinlock_t *lock;
87 };
88 #define to_command(c) container_of(c, struct command, kref)
89
90 void ibmasm_free_command(struct kref *kref);
91 static inline void command_put(struct command *cmd)
92 {
93 unsigned long flags;
94 spinlock_t *lock = cmd->lock;
95
96 spin_lock_irqsave(lock, flags);
97 kref_put(&cmd->kref, ibmasm_free_command);
98 spin_unlock_irqrestore(lock, flags);
99 }
100
101 static inline void command_get(struct command *cmd)
102 {
103 kref_get(&cmd->kref);
104 }
105
106
107 struct ibmasm_event {
108 unsigned int serial_number;
109 unsigned int data_size;
110 unsigned char data[IBMASM_EVENT_MAX_SIZE];
111 };
112
113 struct event_buffer {
114 struct ibmasm_event events[IBMASM_NUM_EVENTS];
115 unsigned int next_serial_number;
116 unsigned int next_index;
117 struct list_head readers;
118 };
119
120 struct event_reader {
121 int cancelled;
122 unsigned int next_serial_number;
123 wait_queue_head_t wait;
124 struct list_head node;
125 unsigned int data_size;
126 unsigned char data[IBMASM_EVENT_MAX_SIZE];
127 };
128
129 struct reverse_heartbeat {
130 wait_queue_head_t wait;
131 unsigned int stopped;
132 };
133
134 struct ibmasm_remote {
135 struct input_dev *keybd_dev;
136 struct input_dev *mouse_dev;
137 };
138
139 struct service_processor {
140 struct list_head node;
141 spinlock_t lock;
142 void __iomem *base_address;
143 unsigned int irq;
144 struct command *current_command;
145 struct command *heartbeat;
146 struct list_head command_queue;
147 struct event_buffer *event_buffer;
148 char dirname[IBMASM_NAME_SIZE];
149 char devname[IBMASM_NAME_SIZE];
150 unsigned int number;
151 struct ibmasm_remote remote;
152 int serial_line;
153 struct device *dev;
154 };
155
156
157 struct command *ibmasm_new_command(struct service_processor *sp, size_t buffer_size);
158 void ibmasm_exec_command(struct service_processor *sp, struct command *cmd);
159 void ibmasm_wait_for_response(struct command *cmd, int timeout);
160 void ibmasm_receive_command_response(struct service_processor *sp, void *response, size_t size);
161
162
163 int ibmasm_event_buffer_init(struct service_processor *sp);
164 void ibmasm_event_buffer_exit(struct service_processor *sp);
165 void ibmasm_receive_event(struct service_processor *sp, void *data, unsigned int data_size);
166 void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader);
167 void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader);
168 int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader);
169 void ibmasm_cancel_next_event(struct event_reader *reader);
170
171
172 void ibmasm_register_panic_notifier(void);
173 void ibmasm_unregister_panic_notifier(void);
174 int ibmasm_heartbeat_init(struct service_processor *sp);
175 void ibmasm_heartbeat_exit(struct service_processor *sp);
176 void ibmasm_receive_heartbeat(struct service_processor *sp, void *message, size_t size);
177
178
179 void ibmasm_init_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
180 int ibmasm_start_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb);
181 void ibmasm_stop_reverse_heartbeat(struct reverse_heartbeat *rhb);
182
183
184 void ibmasm_receive_message(struct service_processor *sp, void *data, int data_size);
185 int ibmasm_send_driver_vpd(struct service_processor *sp);
186 int ibmasm_send_os_state(struct service_processor *sp, int os_state);
187
188
189 int ibmasm_send_i2o_message(struct service_processor *sp);
190 irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id);
191
192
193 void ibmasm_handle_mouse_interrupt(struct service_processor *sp);
194 int ibmasm_init_remote_input_dev(struct service_processor *sp);
195 void ibmasm_free_remote_input_dev(struct service_processor *sp);
196
197
198 int ibmasmfs_register(void);
199 void ibmasmfs_unregister(void);
200 void ibmasmfs_add_sp(struct service_processor *sp);
201
202
203 #if IS_ENABLED(CONFIG_SERIAL_8250)
204 void ibmasm_register_uart(struct service_processor *sp);
205 void ibmasm_unregister_uart(struct service_processor *sp);
206 #else
207 #define ibmasm_register_uart(sp) do { } while(0)
208 #define ibmasm_unregister_uart(sp) do { } while(0)
209 #endif