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