253 lines
9.0 KiB
C
253 lines
9.0 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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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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/* 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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/* Structure for the low-level drivers. */
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typedef struct ipmi_smi *ipmi_smi_t;
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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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/* Will be called when the system is done with the message
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(presumably to free it). */
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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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/* 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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int (*start_processing)(void *send_info,
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ipmi_smi_t new_intf);
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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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/* 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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void (*sender)(void *send_info,
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struct ipmi_smi_msg *msg);
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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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void (*request_events)(void *send_info);
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/* Called by the upper layer when some user requires that the
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interface watch for events, received messages, watchdog
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pretimeouts, or not. Used by the SMI to know if it should
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watch for these. This may be NULL if the SMI does not
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implement it. */
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void (*set_need_watch)(void *send_info, bool enable);
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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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/* 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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void (*set_run_to_completion)(void *send_info, bool run_to_completion);
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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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void (*poll)(void *send_info);
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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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void (*set_maintenance_mode)(void *send_info, bool enable);
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/* Tell the handler that we are using it/not using it. The
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message handler get the modules that this handler belongs
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to; this function lets the SMI claim any modules that it
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uses. These may be NULL if this is not required. */
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int (*inc_usecount)(void *send_info);
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void (*dec_usecount)(void *send_info);
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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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/* Take a pointer to a raw data buffer and a length and extract device
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id information from it. The first byte of data must point to the
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netfn << 2, the data should be of the format:
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netfn << 2, cmd, completion code, data
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as normally comes from a device interface. */
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static inline int ipmi_demangle_device_id(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 < 9)
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return -EINVAL;
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if (data[0] != IPMI_NETFN_APP_RESPONSE << 2 ||
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data[1] != 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[2] != 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 += 3;
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data_len -= 3;
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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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/* 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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int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
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void *send_info,
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struct ipmi_device_id *device_id,
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struct device *dev,
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unsigned char 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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int ipmi_unregister_smi(ipmi_smi_t 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(ipmi_smi_t 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(ipmi_smi_t 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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/* Allow the lower layer to add things to the proc filesystem
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directory for this interface. Note that the entry will
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automatically be dstroyed when the interface is destroyed. */
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int ipmi_smi_add_proc_entry(ipmi_smi_t smi, char *name,
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const struct file_operations *proc_ops,
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void *data);
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#endif /* __LINUX_IPMI_SMI_H */
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