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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
210 lines
5.9 KiB
C
210 lines
5.9 KiB
C
/* 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 <amax@us.ibm.com>
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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 <masbock@us.ibm.com>, Vernon Mauery <vernux@us.ibm.com>"
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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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