Edit File: ipmi_smi.h
/* SPDX-License-Identifier: GPL-2.0+ */ /* * ipmi_smi.h * * MontaVista IPMI system management interface * * Author: MontaVista Software, Inc. * Corey Minyard <minyard@mvista.com> * source@mvista.com * * Copyright 2002 MontaVista Software Inc. * */ #ifndef __LINUX_IPMI_SMI_H #define __LINUX_IPMI_SMI_H #include <linux/ipmi_msgdefs.h> #include <linux/proc_fs.h> #include <linux/platform_device.h> #include <linux/ipmi.h> struct device; /* This files describes the interface for IPMI system management interface drivers to bind into the IPMI message handler. */ /* Structure for the low-level drivers. */ typedef struct ipmi_smi *ipmi_smi_t; /* * Messages to/from the lower layer. The smi interface will take one * of these to send. After the send has occurred and a response has * been received, it will report this same data structure back up to * the upper layer. If an error occurs, it should fill in the * response with an error code in the completion code location. When * asynchronous data is received, one of these is allocated, the * data_size is set to zero and the response holds the data from the * get message or get event command that the interface initiated. * Note that it is the interfaces responsibility to detect * asynchronous data and messages and request them from the * interface. */ struct ipmi_smi_msg { struct list_head link; long msgid; void *user_data; int data_size; unsigned char data[IPMI_MAX_MSG_LENGTH]; int rsp_size; unsigned char rsp[IPMI_MAX_MSG_LENGTH]; /* Will be called when the system is done with the message (presumably to free it). */ void (*done)(struct ipmi_smi_msg *msg); }; struct ipmi_smi_handlers { struct module *owner; /* The low-level interface cannot start sending messages to the upper layer until this function is called. This may not be NULL, the lower layer must take the interface from this call. */ int (*start_processing)(void *send_info, ipmi_smi_t new_intf); /* * Get the detailed private info of the low level interface and store * it into the structure of ipmi_smi_data. For example: the * ACPI device handle will be returned for the pnp_acpi IPMI device. */ int (*get_smi_info)(void *send_info, struct ipmi_smi_info *data); /* Called to enqueue an SMI message to be sent. This operation is not allowed to fail. If an error occurs, it should report back the error in a received message. It may do this in the current call context, since no write locks are held when this is run. If the priority is > 0, the message will go into a high-priority queue and be sent first. Otherwise, it goes into a normal-priority queue. */ void (*sender)(void *send_info, struct ipmi_smi_msg *msg, int priority); /* Called by the upper layer to request that we try to get events from the BMC we are attached to. */ void (*request_events)(void *send_info); /* Called when the interface should go into "run to completion" mode. If this call sets the value to true, the interface should make sure that all messages are flushed out and that none are pending, and any new requests are run to completion immediately. */ void (*set_run_to_completion)(void *send_info, int run_to_completion); /* Called to poll for work to do. This is so upper layers can poll for operations during things like crash dumps. */ void (*poll)(void *send_info); /* Enable/disable firmware maintenance mode. Note that this is *not* the modes defined, this is simply an on/off setting. The message handler does the mode handling. Note that this is called from interrupt context, so it cannot block. */ void (*set_maintenance_mode)(void *send_info, int enable); /* Tell the handler that we are using it/not using it. The message handler get the modules that this handler belongs to; this function lets the SMI claim any modules that it uses. These may be NULL if this is not required. */ int (*inc_usecount)(void *send_info); void (*dec_usecount)(void *send_info); }; /* * shadow struct of ipmi_smi_handlers to manage new fields backported * from upstream. * * *** NOTE: This struct is not kabi protected. *** */ struct ipmi_shadow_smi_handlers { /* Copy of pointer to caller's handlers for sanity checking. */ struct ipmi_smi_handlers *handlers; /* Add new fields below this line * ---------------------------------------------------------- */ /* Called by the upper layer when some user requires that the interface watch for events, received messages, watchdog pretimeouts, or not. Used by the SMI to know if it should watch for these. This may be NULL if the SMI does not implement it. */ void (*set_need_watch)(void *send_info, int enable); /* * Called when flushing all pending messages. */ void (*flush_messages)(void *send_info); }; struct ipmi_shadow_smi_handlers *ipmi_get_shadow_smi_handlers(void); struct ipmi_device_id { unsigned char device_id; unsigned char device_revision; unsigned char firmware_revision_1; unsigned char firmware_revision_2; unsigned char ipmi_version; unsigned char additional_device_support; unsigned int manufacturer_id; unsigned int product_id; unsigned char aux_firmware_revision[4]; unsigned int aux_firmware_revision_set : 1; }; #define ipmi_version_major(v) ((v)->ipmi_version & 0xf) #define ipmi_version_minor(v) ((v)->ipmi_version >> 4) /* Take a pointer to an IPMI response and extract device id information from * it. @netfn is in the IPMI_NETFN_ format, so may need to be shifted from * a SI response. */ static inline int ipmi_demangle_device_id(uint8_t netfn, uint8_t cmd, const unsigned char *data, unsigned int data_len, struct ipmi_device_id *id) { if (data_len < 7) return -EINVAL; if (netfn != IPMI_NETFN_APP_RESPONSE || cmd != IPMI_GET_DEVICE_ID_CMD) /* Strange, didn't get the response we expected. */ return -EINVAL; if (data[0] != 0) /* That's odd, it shouldn't be able to fail. */ return -EINVAL; data++; data_len--; id->device_id = data[0]; id->device_revision = data[1]; id->firmware_revision_1 = data[2]; id->firmware_revision_2 = data[3]; id->ipmi_version = data[4]; id->additional_device_support = data[5]; if (data_len >= 11) { id->manufacturer_id = (data[6] | (data[7] << 8) | (data[8] << 16)); id->product_id = data[9] | (data[10] << 8); } else { id->manufacturer_id = 0; id->product_id = 0; } if (data_len >= 15) { memcpy(id->aux_firmware_revision, data+11, 4); id->aux_firmware_revision_set = 1; } else id->aux_firmware_revision_set = 0; return 0; } /* Add a low-level interface to the IPMI driver. Note that if the interface doesn't know its slave address, it should pass in zero. The low-level interface should not deliver any messages to the upper layer until the start_processing() function in the handlers is called, and the lower layer must get the interface from that call. */ int ipmi_register_smi(struct ipmi_smi_handlers *handlers, void *send_info, struct ipmi_device_id *device_id, struct device *dev, const char *sysfs_name, unsigned char slave_addr); /* * Remove a low-level interface from the IPMI driver. This will * return an error if the interface is still in use by a user. */ int ipmi_unregister_smi(ipmi_smi_t intf); /* * The lower layer reports received messages through this interface. * The data_size should be zero if this is an asynchronous message. If * the lower layer gets an error sending a message, it should format * an error response in the message response. */ void ipmi_smi_msg_received(ipmi_smi_t intf, struct ipmi_smi_msg *msg); /* The lower layer received a watchdog pre-timeout on interface. */ void ipmi_smi_watchdog_pretimeout(ipmi_smi_t intf); struct ipmi_smi_msg *ipmi_alloc_smi_msg(void); static inline void ipmi_free_smi_msg(struct ipmi_smi_msg *msg) { msg->done(msg); } #ifdef CONFIG_IPMI_PROC_INTERFACE /* Allow the lower layer to add things to the proc filesystem directory for this interface. Note that the entry will automatically be dstroyed when the interface is destroyed. */ int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name, const struct file_operations *proc_ops, void *data); #endif #endif /* __LINUX_IPMI_SMI_H */