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209 lines
5.9 KiB
209 lines
5.9 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* IBM ASM Service Processor Device Driver |
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* |
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* Copyright (C) IBM Corporation, 2004 |
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* |
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* Author: Max Asböck <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/list.h> |
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#include <linux/wait.h> |
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#include <linux/spinlock.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/interrupt.h> |
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#include <linux/kref.h> |
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#include <linux/device.h> |
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#include <linux/input.h> |
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#include <linux/time64.h> |
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/* Driver identification */ |
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#define DRIVER_NAME "ibmasm" |
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#define DRIVER_VERSION "1.0" |
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#define DRIVER_AUTHOR "Max Asbock <[email protected]>, Vernon Mauery <[email protected]>" |
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#define DRIVER_DESC "IBM ASM Service Processor Driver" |
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#define err(msg) printk(KERN_ERR "%s: " msg "\n", DRIVER_NAME) |
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#define info(msg) printk(KERN_INFO "%s: " msg "\n", DRIVER_NAME) |
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extern int ibmasm_debug; |
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#define dbg(STR, ARGS...) \ |
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do { \ |
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if (ibmasm_debug) \ |
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printk(KERN_DEBUG STR , ##ARGS); \ |
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} while (0) |
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static inline char *get_timestamp(char *buf) |
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{ |
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struct timespec64 now; |
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ktime_get_real_ts64(&now); |
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sprintf(buf, "%llu.%.08lu", (long long)now.tv_sec, |
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now.tv_nsec / NSEC_PER_USEC); |
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return buf; |
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} |
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#define IBMASM_CMD_PENDING 0 |
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#define IBMASM_CMD_COMPLETE 1 |
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#define IBMASM_CMD_FAILED 2 |
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#define IBMASM_CMD_TIMEOUT_NORMAL 45 |
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#define IBMASM_CMD_TIMEOUT_EXTRA 240 |
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#define IBMASM_CMD_MAX_BUFFER_SIZE 0x8000 |
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#define REVERSE_HEARTBEAT_TIMEOUT 120 |
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#define HEARTBEAT_BUFFER_SIZE 0x400 |
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#ifdef IA64 |
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#define IBMASM_DRIVER_VPD "Lin64 6.08 " |
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#else |
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#define IBMASM_DRIVER_VPD "Lin32 6.08 " |
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#endif |
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#define SYSTEM_STATE_OS_UP 5 |
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#define SYSTEM_STATE_OS_DOWN 4 |
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#define IBMASM_NAME_SIZE 16 |
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#define IBMASM_NUM_EVENTS 10 |
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#define IBMASM_EVENT_MAX_SIZE 2048u |
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struct command { |
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struct list_head queue_node; |
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wait_queue_head_t wait; |
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unsigned char *buffer; |
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size_t buffer_size; |
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int status; |
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struct kref kref; |
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spinlock_t *lock; |
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}; |
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#define to_command(c) container_of(c, struct command, kref) |
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void ibmasm_free_command(struct kref *kref); |
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static inline void command_put(struct command *cmd) |
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{ |
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unsigned long flags; |
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spinlock_t *lock = cmd->lock; |
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spin_lock_irqsave(lock, flags); |
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kref_put(&cmd->kref, ibmasm_free_command); |
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spin_unlock_irqrestore(lock, flags); |
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} |
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static inline void command_get(struct command *cmd) |
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{ |
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kref_get(&cmd->kref); |
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} |
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struct ibmasm_event { |
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unsigned int serial_number; |
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unsigned int data_size; |
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unsigned char data[IBMASM_EVENT_MAX_SIZE]; |
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}; |
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struct event_buffer { |
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struct ibmasm_event events[IBMASM_NUM_EVENTS]; |
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unsigned int next_serial_number; |
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unsigned int next_index; |
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struct list_head readers; |
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}; |
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struct event_reader { |
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int cancelled; |
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unsigned int next_serial_number; |
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wait_queue_head_t wait; |
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struct list_head node; |
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unsigned int data_size; |
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unsigned char data[IBMASM_EVENT_MAX_SIZE]; |
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}; |
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struct reverse_heartbeat { |
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wait_queue_head_t wait; |
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unsigned int stopped; |
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}; |
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struct ibmasm_remote { |
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struct input_dev *keybd_dev; |
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struct input_dev *mouse_dev; |
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}; |
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struct service_processor { |
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struct list_head node; |
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spinlock_t lock; |
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void __iomem *base_address; |
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unsigned int irq; |
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struct command *current_command; |
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struct command *heartbeat; |
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struct list_head command_queue; |
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struct event_buffer *event_buffer; |
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char dirname[IBMASM_NAME_SIZE]; |
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char devname[IBMASM_NAME_SIZE]; |
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unsigned int number; |
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struct ibmasm_remote remote; |
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int serial_line; |
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struct device *dev; |
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}; |
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/* command processing */ |
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struct command *ibmasm_new_command(struct service_processor *sp, size_t buffer_size); |
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void ibmasm_exec_command(struct service_processor *sp, struct command *cmd); |
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void ibmasm_wait_for_response(struct command *cmd, int timeout); |
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void ibmasm_receive_command_response(struct service_processor *sp, void *response, size_t size); |
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/* event processing */ |
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int ibmasm_event_buffer_init(struct service_processor *sp); |
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void ibmasm_event_buffer_exit(struct service_processor *sp); |
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void ibmasm_receive_event(struct service_processor *sp, void *data, unsigned int data_size); |
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void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader); |
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void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader); |
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int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader); |
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void ibmasm_cancel_next_event(struct event_reader *reader); |
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/* heartbeat - from SP to OS */ |
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void ibmasm_register_panic_notifier(void); |
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void ibmasm_unregister_panic_notifier(void); |
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int ibmasm_heartbeat_init(struct service_processor *sp); |
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void ibmasm_heartbeat_exit(struct service_processor *sp); |
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void ibmasm_receive_heartbeat(struct service_processor *sp, void *message, size_t size); |
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/* reverse heartbeat - from OS to SP */ |
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void ibmasm_init_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb); |
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int ibmasm_start_reverse_heartbeat(struct service_processor *sp, struct reverse_heartbeat *rhb); |
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void ibmasm_stop_reverse_heartbeat(struct reverse_heartbeat *rhb); |
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/* dot commands */ |
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void ibmasm_receive_message(struct service_processor *sp, void *data, int data_size); |
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int ibmasm_send_driver_vpd(struct service_processor *sp); |
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int ibmasm_send_os_state(struct service_processor *sp, int os_state); |
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/* low level message processing */ |
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int ibmasm_send_i2o_message(struct service_processor *sp); |
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irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id); |
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/* remote console */ |
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void ibmasm_handle_mouse_interrupt(struct service_processor *sp); |
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int ibmasm_init_remote_input_dev(struct service_processor *sp); |
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void ibmasm_free_remote_input_dev(struct service_processor *sp); |
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/* file system */ |
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int ibmasmfs_register(void); |
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void ibmasmfs_unregister(void); |
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void ibmasmfs_add_sp(struct service_processor *sp); |
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/* uart */ |
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#if IS_ENABLED(CONFIG_SERIAL_8250) |
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void ibmasm_register_uart(struct service_processor *sp); |
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void ibmasm_unregister_uart(struct service_processor *sp); |
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#else |
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#define ibmasm_register_uart(sp) do { } while(0) |
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#define ibmasm_unregister_uart(sp) do { } while(0) |
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#endif
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