// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015-2018, Intel Corporation. */ #define pr_fmt(fmt) … #include <linux/errno.h> #include <linux/io.h> #include <linux/ipmi_bmc.h> #include <linux/list.h> #include <linux/miscdevice.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/platform_device.h> #include <linux/poll.h> #include <linux/sched.h> #include <linux/slab.h> #include "kcs_bmc_client.h" /* Different phases of the KCS BMC module. * KCS_PHASE_IDLE: * BMC should not be expecting nor sending any data. * KCS_PHASE_WRITE_START: * BMC is receiving a WRITE_START command from system software. * KCS_PHASE_WRITE_DATA: * BMC is receiving a data byte from system software. * KCS_PHASE_WRITE_END_CMD: * BMC is waiting a last data byte from system software. * KCS_PHASE_WRITE_DONE: * BMC has received the whole request from system software. * KCS_PHASE_WAIT_READ: * BMC is waiting the response from the upper IPMI service. * KCS_PHASE_READ: * BMC is transferring the response to system software. * KCS_PHASE_ABORT_ERROR1: * BMC is waiting error status request from system software. * KCS_PHASE_ABORT_ERROR2: * BMC is waiting for idle status afer error from system software. * KCS_PHASE_ERROR: * BMC has detected a protocol violation at the interface level. */ enum kcs_ipmi_phases { … }; /* IPMI 2.0 - Table 9-4, KCS Interface Status Codes */ enum kcs_ipmi_errors { … }; struct kcs_bmc_ipmi { … }; #define DEVICE_NAME … #define KCS_MSG_BUFSIZ … #define KCS_ZERO_DATA … /* IPMI 2.0 - Table 9-1, KCS Interface Status Register Bits */ #define KCS_STATUS_STATE(state) … #define KCS_STATUS_STATE_MASK … #define KCS_STATUS_CMD_DAT … #define KCS_STATUS_SMS_ATN … #define KCS_STATUS_IBF … #define KCS_STATUS_OBF … /* IPMI 2.0 - Table 9-2, KCS Interface State Bits */ enum kcs_states { … }; /* IPMI 2.0 - Table 9-3, KCS Interface Control Codes */ #define KCS_CMD_GET_STATUS_ABORT … #define KCS_CMD_WRITE_START … #define KCS_CMD_WRITE_END … #define KCS_CMD_READ_BYTE … static inline void set_state(struct kcs_bmc_ipmi *priv, u8 state) { … } static void kcs_bmc_ipmi_force_abort(struct kcs_bmc_ipmi *priv) { … } static void kcs_bmc_ipmi_handle_data(struct kcs_bmc_ipmi *priv) { … } static void kcs_bmc_ipmi_handle_cmd(struct kcs_bmc_ipmi *priv) { … } static inline struct kcs_bmc_ipmi *client_to_kcs_bmc_ipmi(struct kcs_bmc_client *client) { … } static irqreturn_t kcs_bmc_ipmi_event(struct kcs_bmc_client *client) { … } static const struct kcs_bmc_client_ops kcs_bmc_ipmi_client_ops = …; static inline struct kcs_bmc_ipmi *to_kcs_bmc(struct file *filp) { … } static int kcs_bmc_ipmi_open(struct inode *inode, struct file *filp) { … } static __poll_t kcs_bmc_ipmi_poll(struct file *filp, poll_table *wait) { … } static ssize_t kcs_bmc_ipmi_read(struct file *filp, char __user *buf, size_t count, loff_t *ppos) { … } static ssize_t kcs_bmc_ipmi_write(struct file *filp, const char __user *buf, size_t count, loff_t *ppos) { … } static long kcs_bmc_ipmi_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { … } static int kcs_bmc_ipmi_release(struct inode *inode, struct file *filp) { … } static const struct file_operations kcs_bmc_ipmi_fops = …; static DEFINE_SPINLOCK(kcs_bmc_ipmi_instances_lock); static LIST_HEAD(kcs_bmc_ipmi_instances); static int kcs_bmc_ipmi_add_device(struct kcs_bmc_device *kcs_bmc) { … } static int kcs_bmc_ipmi_remove_device(struct kcs_bmc_device *kcs_bmc) { … } static const struct kcs_bmc_driver_ops kcs_bmc_ipmi_driver_ops = …; static struct kcs_bmc_driver kcs_bmc_ipmi_driver = …; static int __init kcs_bmc_ipmi_init(void) { … } module_init(…) …; static void __exit kcs_bmc_ipmi_exit(void) { … } module_exit(kcs_bmc_ipmi_exit); MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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