c3e7e7916e
BMCs can get into ERROR0 state while flashing new firmware, particularly while the BMC is erasing the next flash block, which may take a just under 2 seconds on a Dell PowerEdge 2800 (1.75 seconds typical), during which time the single-threaded firmware may not be able to process new commands. In particular, clearing OBF may not take effect immediately. We want it to delay in ERROR0 after clearing OBF a bit waiting for OBF to actually be clear before proceeding. This introduces a new return value from the LLDD's event loop, SI_SM_CALL_WITH_TICK_DELAY. This means the calling thread/timer should schedule_timeout() at least 1 tick, rather than busy-wait. This is a longer delay than SI_SM_CALL_WITH_DELAY, which is typically a 250us busy-wait. Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
122 lines
4.6 KiB
C
122 lines
4.6 KiB
C
/*
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* ipmi_si_sm.h
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*
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* State machine interface for low-level IPMI system management
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* interface state machines. This code is the interface between
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* the ipmi_smi code (that handles the policy of a KCS, SMIC, or
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* BT interface) and the actual low-level state machine.
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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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/* This is defined by the state machines themselves, it is an opaque
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data type for them to use. */
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struct si_sm_data;
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/* The structure for doing I/O in the state machine. The state
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machine doesn't have the actual I/O routines, they are done through
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this interface. */
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struct si_sm_io
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{
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unsigned char (*inputb)(struct si_sm_io *io, unsigned int offset);
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void (*outputb)(struct si_sm_io *io,
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unsigned int offset,
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unsigned char b);
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/* Generic info used by the actual handling routines, the
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state machine shouldn't touch these. */
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void *info;
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void __iomem *addr;
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int regspacing;
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int regsize;
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int regshift;
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};
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/* Results of SMI events. */
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enum si_sm_result
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{
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SI_SM_CALL_WITHOUT_DELAY, /* Call the driver again immediately */
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SI_SM_CALL_WITH_DELAY, /* Delay some before calling again. */
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SI_SM_CALL_WITH_TICK_DELAY, /* Delay at least 1 tick before calling again. */
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SI_SM_TRANSACTION_COMPLETE, /* A transaction is finished. */
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SI_SM_IDLE, /* The SM is in idle state. */
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SI_SM_HOSED, /* The hardware violated the state machine. */
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SI_SM_ATTN /* The hardware is asserting attn and the
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state machine is idle. */
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};
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/* Handlers for the SMI state machine. */
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struct si_sm_handlers
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{
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/* Put the version number of the state machine here so the
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upper layer can print it. */
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char *version;
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/* Initialize the data and return the amount of I/O space to
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reserve for the space. */
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unsigned int (*init_data)(struct si_sm_data *smi,
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struct si_sm_io *io);
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/* Start a new transaction in the state machine. This will
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return -2 if the state machine is not idle, -1 if the size
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is invalid (to large or too small), or 0 if the transaction
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is successfully completed. */
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int (*start_transaction)(struct si_sm_data *smi,
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unsigned char *data, unsigned int size);
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/* Return the results after the transaction. This will return
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-1 if the buffer is too small, zero if no transaction is
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present, or the actual length of the result data. */
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int (*get_result)(struct si_sm_data *smi,
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unsigned char *data, unsigned int length);
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/* Call this periodically (for a polled interface) or upon
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receiving an interrupt (for a interrupt-driven interface).
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If interrupt driven, you should probably poll this
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periodically when not in idle state. This should be called
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with the time that passed since the last call, if it is
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significant. Time is in microseconds. */
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enum si_sm_result (*event)(struct si_sm_data *smi, long time);
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/* Attempt to detect an SMI. Returns 0 on success or nonzero
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on failure. */
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int (*detect)(struct si_sm_data *smi);
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/* The interface is shutting down, so clean it up. */
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void (*cleanup)(struct si_sm_data *smi);
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/* Return the size of the SMI structure in bytes. */
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int (*size)(void);
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};
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/* Current state machines that we can use. */
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extern struct si_sm_handlers kcs_smi_handlers;
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extern struct si_sm_handlers smic_smi_handlers;
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extern struct si_sm_handlers bt_smi_handlers;
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