3988 lines
98 KiB
C
3988 lines
98 KiB
C
/*
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* ipmi_si.c
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*
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* The interface to the IPMI driver for the system interfaces (KCS, SMIC,
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* BT).
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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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* Copyright 2006 IBM Corp., Christian Krafft <krafft@de.ibm.com>
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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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/*
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* This file holds the "policy" for the interface to the SMI state
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* machine. It does the configuration, handles timers and interrupts,
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* and drives the real SMI state machine.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/timer.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/list.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <linux/notifier.h>
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <asm/irq.h>
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#include <linux/interrupt.h>
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#include <linux/rcupdate.h>
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#include <linux/ipmi.h>
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#include <linux/ipmi_smi.h>
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#include <asm/io.h>
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#include "ipmi_si_sm.h"
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#include <linux/dmi.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#ifdef CONFIG_PARISC
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#include <asm/hardware.h> /* for register_parisc_driver() stuff */
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#include <asm/parisc-device.h>
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#endif
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#define PFX "ipmi_si: "
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/* Measure times between events in the driver. */
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#undef DEBUG_TIMING
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/* Call every 10 ms. */
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#define SI_TIMEOUT_TIME_USEC 10000
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#define SI_USEC_PER_JIFFY (1000000/HZ)
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#define SI_TIMEOUT_JIFFIES (SI_TIMEOUT_TIME_USEC/SI_USEC_PER_JIFFY)
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#define SI_SHORT_TIMEOUT_USEC 250 /* .25ms when the SM request a
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short timeout */
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enum si_intf_state {
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SI_NORMAL,
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SI_GETTING_FLAGS,
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SI_GETTING_EVENTS,
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SI_CLEARING_FLAGS,
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SI_GETTING_MESSAGES,
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SI_CHECKING_ENABLES,
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SI_SETTING_ENABLES
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/* FIXME - add watchdog stuff. */
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};
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/* Some BT-specific defines we need here. */
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#define IPMI_BT_INTMASK_REG 2
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#define IPMI_BT_INTMASK_CLEAR_IRQ_BIT 2
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#define IPMI_BT_INTMASK_ENABLE_IRQ_BIT 1
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enum si_type {
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SI_KCS, SI_SMIC, SI_BT
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};
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static const char * const si_to_str[] = { "kcs", "smic", "bt" };
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#define DEVICE_NAME "ipmi_si"
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static struct platform_driver ipmi_driver;
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/*
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* Indexes into stats[] in smi_info below.
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*/
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enum si_stat_indexes {
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/*
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* Number of times the driver requested a timer while an operation
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* was in progress.
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*/
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SI_STAT_short_timeouts = 0,
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/*
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* Number of times the driver requested a timer while nothing was in
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* progress.
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*/
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SI_STAT_long_timeouts,
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/* Number of times the interface was idle while being polled. */
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SI_STAT_idles,
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/* Number of interrupts the driver handled. */
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SI_STAT_interrupts,
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/* Number of time the driver got an ATTN from the hardware. */
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SI_STAT_attentions,
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/* Number of times the driver requested flags from the hardware. */
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SI_STAT_flag_fetches,
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/* Number of times the hardware didn't follow the state machine. */
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SI_STAT_hosed_count,
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/* Number of completed messages. */
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SI_STAT_complete_transactions,
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/* Number of IPMI events received from the hardware. */
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SI_STAT_events,
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/* Number of watchdog pretimeouts. */
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SI_STAT_watchdog_pretimeouts,
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/* Number of asynchronous messages received. */
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SI_STAT_incoming_messages,
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/* This *must* remain last, add new values above this. */
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SI_NUM_STATS
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};
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struct smi_info {
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int intf_num;
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ipmi_smi_t intf;
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struct si_sm_data *si_sm;
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const struct si_sm_handlers *handlers;
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enum si_type si_type;
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spinlock_t si_lock;
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struct ipmi_smi_msg *waiting_msg;
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struct ipmi_smi_msg *curr_msg;
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enum si_intf_state si_state;
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/*
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* Used to handle the various types of I/O that can occur with
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* IPMI
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*/
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struct si_sm_io io;
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int (*io_setup)(struct smi_info *info);
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void (*io_cleanup)(struct smi_info *info);
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int (*irq_setup)(struct smi_info *info);
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void (*irq_cleanup)(struct smi_info *info);
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unsigned int io_size;
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enum ipmi_addr_src addr_source; /* ACPI, PCI, SMBIOS, hardcode, etc. */
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void (*addr_source_cleanup)(struct smi_info *info);
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void *addr_source_data;
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/*
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* Per-OEM handler, called from handle_flags(). Returns 1
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* when handle_flags() needs to be re-run or 0 indicating it
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* set si_state itself.
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*/
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int (*oem_data_avail_handler)(struct smi_info *smi_info);
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/*
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* Flags from the last GET_MSG_FLAGS command, used when an ATTN
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* is set to hold the flags until we are done handling everything
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* from the flags.
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*/
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#define RECEIVE_MSG_AVAIL 0x01
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#define EVENT_MSG_BUFFER_FULL 0x02
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#define WDT_PRE_TIMEOUT_INT 0x08
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#define OEM0_DATA_AVAIL 0x20
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#define OEM1_DATA_AVAIL 0x40
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#define OEM2_DATA_AVAIL 0x80
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#define OEM_DATA_AVAIL (OEM0_DATA_AVAIL | \
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OEM1_DATA_AVAIL | \
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OEM2_DATA_AVAIL)
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unsigned char msg_flags;
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/* Does the BMC have an event buffer? */
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bool has_event_buffer;
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/*
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* If set to true, this will request events the next time the
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* state machine is idle.
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*/
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atomic_t req_events;
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/*
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* If true, run the state machine to completion on every send
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* call. Generally used after a panic to make sure stuff goes
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* out.
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*/
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bool run_to_completion;
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/* The I/O port of an SI interface. */
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int port;
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/*
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* The space between start addresses of the two ports. For
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* instance, if the first port is 0xca2 and the spacing is 4, then
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* the second port is 0xca6.
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*/
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unsigned int spacing;
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/* zero if no irq; */
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int irq;
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/* The timer for this si. */
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struct timer_list si_timer;
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/* This flag is set, if the timer is running (timer_pending() isn't enough) */
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bool timer_running;
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/* The time (in jiffies) the last timeout occurred at. */
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unsigned long last_timeout_jiffies;
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/* Are we waiting for the events, pretimeouts, received msgs? */
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atomic_t need_watch;
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/*
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* The driver will disable interrupts when it gets into a
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* situation where it cannot handle messages due to lack of
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* memory. Once that situation clears up, it will re-enable
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* interrupts.
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*/
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bool interrupt_disabled;
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/*
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* Does the BMC support events?
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*/
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bool supports_event_msg_buff;
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/*
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* Can we disable interrupts the global enables receive irq
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* bit? There are currently two forms of brokenness, some
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* systems cannot disable the bit (which is technically within
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* the spec but a bad idea) and some systems have the bit
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* forced to zero even though interrupts work (which is
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* clearly outside the spec). The next bool tells which form
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* of brokenness is present.
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*/
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bool cannot_disable_irq;
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/*
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* Some systems are broken and cannot set the irq enable
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* bit, even if they support interrupts.
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*/
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bool irq_enable_broken;
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/*
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* Did we get an attention that we did not handle?
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*/
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bool got_attn;
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/* From the get device id response... */
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struct ipmi_device_id device_id;
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/* Driver model stuff. */
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struct device *dev;
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struct platform_device *pdev;
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/*
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* True if we allocated the device, false if it came from
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* someplace else (like PCI).
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*/
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bool dev_registered;
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/* Slave address, could be reported from DMI. */
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unsigned char slave_addr;
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/* Counters and things for the proc filesystem. */
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atomic_t stats[SI_NUM_STATS];
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struct task_struct *thread;
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struct list_head link;
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union ipmi_smi_info_union addr_info;
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};
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#define smi_inc_stat(smi, stat) \
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atomic_inc(&(smi)->stats[SI_STAT_ ## stat])
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#define smi_get_stat(smi, stat) \
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((unsigned int) atomic_read(&(smi)->stats[SI_STAT_ ## stat]))
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#define SI_MAX_PARMS 4
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static int force_kipmid[SI_MAX_PARMS];
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static int num_force_kipmid;
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#ifdef CONFIG_PCI
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static bool pci_registered;
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#endif
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#ifdef CONFIG_PARISC
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static bool parisc_registered;
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#endif
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static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
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static int num_max_busy_us;
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static bool unload_when_empty = true;
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static int add_smi(struct smi_info *smi);
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static int try_smi_init(struct smi_info *smi);
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static void cleanup_one_si(struct smi_info *to_clean);
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static void cleanup_ipmi_si(void);
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#ifdef DEBUG_TIMING
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void debug_timestamp(char *msg)
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{
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struct timespec64 t;
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getnstimeofday64(&t);
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pr_debug("**%s: %lld.%9.9ld\n", msg, (long long) t.tv_sec, t.tv_nsec);
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}
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#else
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#define debug_timestamp(x)
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#endif
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static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
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static int register_xaction_notifier(struct notifier_block *nb)
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{
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return atomic_notifier_chain_register(&xaction_notifier_list, nb);
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}
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static void deliver_recv_msg(struct smi_info *smi_info,
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struct ipmi_smi_msg *msg)
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{
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/* Deliver the message to the upper layer. */
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if (smi_info->intf)
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ipmi_smi_msg_received(smi_info->intf, msg);
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else
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ipmi_free_smi_msg(msg);
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}
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static void return_hosed_msg(struct smi_info *smi_info, int cCode)
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{
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struct ipmi_smi_msg *msg = smi_info->curr_msg;
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if (cCode < 0 || cCode > IPMI_ERR_UNSPECIFIED)
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cCode = IPMI_ERR_UNSPECIFIED;
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/* else use it as is */
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/* Make it a response */
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msg->rsp[0] = msg->data[0] | 4;
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msg->rsp[1] = msg->data[1];
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msg->rsp[2] = cCode;
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msg->rsp_size = 3;
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smi_info->curr_msg = NULL;
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deliver_recv_msg(smi_info, msg);
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}
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static enum si_sm_result start_next_msg(struct smi_info *smi_info)
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{
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int rv;
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if (!smi_info->waiting_msg) {
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smi_info->curr_msg = NULL;
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rv = SI_SM_IDLE;
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} else {
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int err;
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smi_info->curr_msg = smi_info->waiting_msg;
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smi_info->waiting_msg = NULL;
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debug_timestamp("Start2");
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err = atomic_notifier_call_chain(&xaction_notifier_list,
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0, smi_info);
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if (err & NOTIFY_STOP_MASK) {
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rv = SI_SM_CALL_WITHOUT_DELAY;
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goto out;
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}
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err = smi_info->handlers->start_transaction(
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smi_info->si_sm,
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smi_info->curr_msg->data,
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smi_info->curr_msg->data_size);
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if (err)
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return_hosed_msg(smi_info, err);
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rv = SI_SM_CALL_WITHOUT_DELAY;
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}
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out:
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return rv;
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}
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static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
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{
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smi_info->last_timeout_jiffies = jiffies;
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mod_timer(&smi_info->si_timer, new_val);
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smi_info->timer_running = true;
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}
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/*
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* Start a new message and (re)start the timer and thread.
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*/
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static void start_new_msg(struct smi_info *smi_info, unsigned char *msg,
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unsigned int size)
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{
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smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
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if (smi_info->thread)
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wake_up_process(smi_info->thread);
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smi_info->handlers->start_transaction(smi_info->si_sm, msg, size);
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}
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static void start_check_enables(struct smi_info *smi_info, bool start_timer)
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{
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unsigned char msg[2];
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msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
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msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
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if (start_timer)
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start_new_msg(smi_info, msg, 2);
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else
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smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
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smi_info->si_state = SI_CHECKING_ENABLES;
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}
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static void start_clear_flags(struct smi_info *smi_info, bool start_timer)
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{
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unsigned char msg[3];
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/* Make sure the watchdog pre-timeout flag is not set at startup. */
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msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
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msg[1] = IPMI_CLEAR_MSG_FLAGS_CMD;
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msg[2] = WDT_PRE_TIMEOUT_INT;
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if (start_timer)
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start_new_msg(smi_info, msg, 3);
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else
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smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
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smi_info->si_state = SI_CLEARING_FLAGS;
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}
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static void start_getting_msg_queue(struct smi_info *smi_info)
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{
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smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
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smi_info->curr_msg->data[1] = IPMI_GET_MSG_CMD;
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smi_info->curr_msg->data_size = 2;
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start_new_msg(smi_info, smi_info->curr_msg->data,
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smi_info->curr_msg->data_size);
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smi_info->si_state = SI_GETTING_MESSAGES;
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}
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static void start_getting_events(struct smi_info *smi_info)
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{
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smi_info->curr_msg->data[0] = (IPMI_NETFN_APP_REQUEST << 2);
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smi_info->curr_msg->data[1] = IPMI_READ_EVENT_MSG_BUFFER_CMD;
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smi_info->curr_msg->data_size = 2;
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start_new_msg(smi_info, smi_info->curr_msg->data,
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smi_info->curr_msg->data_size);
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smi_info->si_state = SI_GETTING_EVENTS;
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}
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|
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/*
|
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* When we have a situtaion where we run out of memory and cannot
|
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* allocate messages, we just leave them in the BMC and run the system
|
|
* polled until we can allocate some memory. Once we have some
|
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* memory, we will re-enable the interrupt.
|
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*
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* Note that we cannot just use disable_irq(), since the interrupt may
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* be shared.
|
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*/
|
|
static inline bool disable_si_irq(struct smi_info *smi_info, bool start_timer)
|
|
{
|
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if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
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smi_info->interrupt_disabled = true;
|
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start_check_enables(smi_info, start_timer);
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return true;
|
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}
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return false;
|
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}
|
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|
|
static inline bool enable_si_irq(struct smi_info *smi_info)
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|
{
|
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if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
|
|
smi_info->interrupt_disabled = false;
|
|
start_check_enables(smi_info, true);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Allocate a message. If unable to allocate, start the interrupt
|
|
* disable process and return NULL. If able to allocate but
|
|
* interrupts are disabled, free the message and return NULL after
|
|
* starting the interrupt enable process.
|
|
*/
|
|
static struct ipmi_smi_msg *alloc_msg_handle_irq(struct smi_info *smi_info)
|
|
{
|
|
struct ipmi_smi_msg *msg;
|
|
|
|
msg = ipmi_alloc_smi_msg();
|
|
if (!msg) {
|
|
if (!disable_si_irq(smi_info, true))
|
|
smi_info->si_state = SI_NORMAL;
|
|
} else if (enable_si_irq(smi_info)) {
|
|
ipmi_free_smi_msg(msg);
|
|
msg = NULL;
|
|
}
|
|
return msg;
|
|
}
|
|
|
|
static void handle_flags(struct smi_info *smi_info)
|
|
{
|
|
retry:
|
|
if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) {
|
|
/* Watchdog pre-timeout */
|
|
smi_inc_stat(smi_info, watchdog_pretimeouts);
|
|
|
|
start_clear_flags(smi_info, true);
|
|
smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT;
|
|
if (smi_info->intf)
|
|
ipmi_smi_watchdog_pretimeout(smi_info->intf);
|
|
} else if (smi_info->msg_flags & RECEIVE_MSG_AVAIL) {
|
|
/* Messages available. */
|
|
smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
|
|
if (!smi_info->curr_msg)
|
|
return;
|
|
|
|
start_getting_msg_queue(smi_info);
|
|
} else if (smi_info->msg_flags & EVENT_MSG_BUFFER_FULL) {
|
|
/* Events available. */
|
|
smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
|
|
if (!smi_info->curr_msg)
|
|
return;
|
|
|
|
start_getting_events(smi_info);
|
|
} else if (smi_info->msg_flags & OEM_DATA_AVAIL &&
|
|
smi_info->oem_data_avail_handler) {
|
|
if (smi_info->oem_data_avail_handler(smi_info))
|
|
goto retry;
|
|
} else
|
|
smi_info->si_state = SI_NORMAL;
|
|
}
|
|
|
|
/*
|
|
* Global enables we care about.
|
|
*/
|
|
#define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \
|
|
IPMI_BMC_EVT_MSG_INTR)
|
|
|
|
static u8 current_global_enables(struct smi_info *smi_info, u8 base,
|
|
bool *irq_on)
|
|
{
|
|
u8 enables = 0;
|
|
|
|
if (smi_info->supports_event_msg_buff)
|
|
enables |= IPMI_BMC_EVT_MSG_BUFF;
|
|
|
|
if (((smi_info->irq && !smi_info->interrupt_disabled) ||
|
|
smi_info->cannot_disable_irq) &&
|
|
!smi_info->irq_enable_broken)
|
|
enables |= IPMI_BMC_RCV_MSG_INTR;
|
|
|
|
if (smi_info->supports_event_msg_buff &&
|
|
smi_info->irq && !smi_info->interrupt_disabled &&
|
|
!smi_info->irq_enable_broken)
|
|
enables |= IPMI_BMC_EVT_MSG_INTR;
|
|
|
|
*irq_on = enables & (IPMI_BMC_EVT_MSG_INTR | IPMI_BMC_RCV_MSG_INTR);
|
|
|
|
return enables;
|
|
}
|
|
|
|
static void check_bt_irq(struct smi_info *smi_info, bool irq_on)
|
|
{
|
|
u8 irqstate = smi_info->io.inputb(&smi_info->io, IPMI_BT_INTMASK_REG);
|
|
|
|
irqstate &= IPMI_BT_INTMASK_ENABLE_IRQ_BIT;
|
|
|
|
if ((bool)irqstate == irq_on)
|
|
return;
|
|
|
|
if (irq_on)
|
|
smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
|
|
IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
|
|
else
|
|
smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 0);
|
|
}
|
|
|
|
static void handle_transaction_done(struct smi_info *smi_info)
|
|
{
|
|
struct ipmi_smi_msg *msg;
|
|
|
|
debug_timestamp("Done");
|
|
switch (smi_info->si_state) {
|
|
case SI_NORMAL:
|
|
if (!smi_info->curr_msg)
|
|
break;
|
|
|
|
smi_info->curr_msg->rsp_size
|
|
= smi_info->handlers->get_result(
|
|
smi_info->si_sm,
|
|
smi_info->curr_msg->rsp,
|
|
IPMI_MAX_MSG_LENGTH);
|
|
|
|
/*
|
|
* Do this here becase deliver_recv_msg() releases the
|
|
* lock, and a new message can be put in during the
|
|
* time the lock is released.
|
|
*/
|
|
msg = smi_info->curr_msg;
|
|
smi_info->curr_msg = NULL;
|
|
deliver_recv_msg(smi_info, msg);
|
|
break;
|
|
|
|
case SI_GETTING_FLAGS:
|
|
{
|
|
unsigned char msg[4];
|
|
unsigned int len;
|
|
|
|
/* We got the flags from the SMI, now handle them. */
|
|
len = smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
|
|
if (msg[2] != 0) {
|
|
/* Error fetching flags, just give up for now. */
|
|
smi_info->si_state = SI_NORMAL;
|
|
} else if (len < 4) {
|
|
/*
|
|
* Hmm, no flags. That's technically illegal, but
|
|
* don't use uninitialized data.
|
|
*/
|
|
smi_info->si_state = SI_NORMAL;
|
|
} else {
|
|
smi_info->msg_flags = msg[3];
|
|
handle_flags(smi_info);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case SI_CLEARING_FLAGS:
|
|
{
|
|
unsigned char msg[3];
|
|
|
|
/* We cleared the flags. */
|
|
smi_info->handlers->get_result(smi_info->si_sm, msg, 3);
|
|
if (msg[2] != 0) {
|
|
/* Error clearing flags */
|
|
dev_warn(smi_info->dev,
|
|
"Error clearing flags: %2.2x\n", msg[2]);
|
|
}
|
|
smi_info->si_state = SI_NORMAL;
|
|
break;
|
|
}
|
|
|
|
case SI_GETTING_EVENTS:
|
|
{
|
|
smi_info->curr_msg->rsp_size
|
|
= smi_info->handlers->get_result(
|
|
smi_info->si_sm,
|
|
smi_info->curr_msg->rsp,
|
|
IPMI_MAX_MSG_LENGTH);
|
|
|
|
/*
|
|
* Do this here becase deliver_recv_msg() releases the
|
|
* lock, and a new message can be put in during the
|
|
* time the lock is released.
|
|
*/
|
|
msg = smi_info->curr_msg;
|
|
smi_info->curr_msg = NULL;
|
|
if (msg->rsp[2] != 0) {
|
|
/* Error getting event, probably done. */
|
|
msg->done(msg);
|
|
|
|
/* Take off the event flag. */
|
|
smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL;
|
|
handle_flags(smi_info);
|
|
} else {
|
|
smi_inc_stat(smi_info, events);
|
|
|
|
/*
|
|
* Do this before we deliver the message
|
|
* because delivering the message releases the
|
|
* lock and something else can mess with the
|
|
* state.
|
|
*/
|
|
handle_flags(smi_info);
|
|
|
|
deliver_recv_msg(smi_info, msg);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case SI_GETTING_MESSAGES:
|
|
{
|
|
smi_info->curr_msg->rsp_size
|
|
= smi_info->handlers->get_result(
|
|
smi_info->si_sm,
|
|
smi_info->curr_msg->rsp,
|
|
IPMI_MAX_MSG_LENGTH);
|
|
|
|
/*
|
|
* Do this here becase deliver_recv_msg() releases the
|
|
* lock, and a new message can be put in during the
|
|
* time the lock is released.
|
|
*/
|
|
msg = smi_info->curr_msg;
|
|
smi_info->curr_msg = NULL;
|
|
if (msg->rsp[2] != 0) {
|
|
/* Error getting event, probably done. */
|
|
msg->done(msg);
|
|
|
|
/* Take off the msg flag. */
|
|
smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL;
|
|
handle_flags(smi_info);
|
|
} else {
|
|
smi_inc_stat(smi_info, incoming_messages);
|
|
|
|
/*
|
|
* Do this before we deliver the message
|
|
* because delivering the message releases the
|
|
* lock and something else can mess with the
|
|
* state.
|
|
*/
|
|
handle_flags(smi_info);
|
|
|
|
deliver_recv_msg(smi_info, msg);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case SI_CHECKING_ENABLES:
|
|
{
|
|
unsigned char msg[4];
|
|
u8 enables;
|
|
bool irq_on;
|
|
|
|
/* We got the flags from the SMI, now handle them. */
|
|
smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
|
|
if (msg[2] != 0) {
|
|
dev_warn(smi_info->dev,
|
|
"Couldn't get irq info: %x.\n", msg[2]);
|
|
dev_warn(smi_info->dev,
|
|
"Maybe ok, but ipmi might run very slowly.\n");
|
|
smi_info->si_state = SI_NORMAL;
|
|
break;
|
|
}
|
|
enables = current_global_enables(smi_info, 0, &irq_on);
|
|
if (smi_info->si_type == SI_BT)
|
|
/* BT has its own interrupt enable bit. */
|
|
check_bt_irq(smi_info, irq_on);
|
|
if (enables != (msg[3] & GLOBAL_ENABLES_MASK)) {
|
|
/* Enables are not correct, fix them. */
|
|
msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
|
|
msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
|
|
msg[2] = enables | (msg[3] & ~GLOBAL_ENABLES_MASK);
|
|
smi_info->handlers->start_transaction(
|
|
smi_info->si_sm, msg, 3);
|
|
smi_info->si_state = SI_SETTING_ENABLES;
|
|
} else if (smi_info->supports_event_msg_buff) {
|
|
smi_info->curr_msg = ipmi_alloc_smi_msg();
|
|
if (!smi_info->curr_msg) {
|
|
smi_info->si_state = SI_NORMAL;
|
|
break;
|
|
}
|
|
start_getting_msg_queue(smi_info);
|
|
} else {
|
|
smi_info->si_state = SI_NORMAL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case SI_SETTING_ENABLES:
|
|
{
|
|
unsigned char msg[4];
|
|
|
|
smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
|
|
if (msg[2] != 0)
|
|
dev_warn(smi_info->dev,
|
|
"Could not set the global enables: 0x%x.\n",
|
|
msg[2]);
|
|
|
|
if (smi_info->supports_event_msg_buff) {
|
|
smi_info->curr_msg = ipmi_alloc_smi_msg();
|
|
if (!smi_info->curr_msg) {
|
|
smi_info->si_state = SI_NORMAL;
|
|
break;
|
|
}
|
|
start_getting_msg_queue(smi_info);
|
|
} else {
|
|
smi_info->si_state = SI_NORMAL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called on timeouts and events. Timeouts should pass the elapsed
|
|
* time, interrupts should pass in zero. Must be called with
|
|
* si_lock held and interrupts disabled.
|
|
*/
|
|
static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
|
|
int time)
|
|
{
|
|
enum si_sm_result si_sm_result;
|
|
|
|
restart:
|
|
/*
|
|
* There used to be a loop here that waited a little while
|
|
* (around 25us) before giving up. That turned out to be
|
|
* pointless, the minimum delays I was seeing were in the 300us
|
|
* range, which is far too long to wait in an interrupt. So
|
|
* we just run until the state machine tells us something
|
|
* happened or it needs a delay.
|
|
*/
|
|
si_sm_result = smi_info->handlers->event(smi_info->si_sm, time);
|
|
time = 0;
|
|
while (si_sm_result == SI_SM_CALL_WITHOUT_DELAY)
|
|
si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
|
|
|
|
if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) {
|
|
smi_inc_stat(smi_info, complete_transactions);
|
|
|
|
handle_transaction_done(smi_info);
|
|
si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
|
|
} else if (si_sm_result == SI_SM_HOSED) {
|
|
smi_inc_stat(smi_info, hosed_count);
|
|
|
|
/*
|
|
* Do the before return_hosed_msg, because that
|
|
* releases the lock.
|
|
*/
|
|
smi_info->si_state = SI_NORMAL;
|
|
if (smi_info->curr_msg != NULL) {
|
|
/*
|
|
* If we were handling a user message, format
|
|
* a response to send to the upper layer to
|
|
* tell it about the error.
|
|
*/
|
|
return_hosed_msg(smi_info, IPMI_ERR_UNSPECIFIED);
|
|
}
|
|
si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0);
|
|
}
|
|
|
|
/*
|
|
* We prefer handling attn over new messages. But don't do
|
|
* this if there is not yet an upper layer to handle anything.
|
|
*/
|
|
if (likely(smi_info->intf) &&
|
|
(si_sm_result == SI_SM_ATTN || smi_info->got_attn)) {
|
|
unsigned char msg[2];
|
|
|
|
if (smi_info->si_state != SI_NORMAL) {
|
|
/*
|
|
* We got an ATTN, but we are doing something else.
|
|
* Handle the ATTN later.
|
|
*/
|
|
smi_info->got_attn = true;
|
|
} else {
|
|
smi_info->got_attn = false;
|
|
smi_inc_stat(smi_info, attentions);
|
|
|
|
/*
|
|
* Got a attn, send down a get message flags to see
|
|
* what's causing it. It would be better to handle
|
|
* this in the upper layer, but due to the way
|
|
* interrupts work with the SMI, that's not really
|
|
* possible.
|
|
*/
|
|
msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
|
|
msg[1] = IPMI_GET_MSG_FLAGS_CMD;
|
|
|
|
start_new_msg(smi_info, msg, 2);
|
|
smi_info->si_state = SI_GETTING_FLAGS;
|
|
goto restart;
|
|
}
|
|
}
|
|
|
|
/* If we are currently idle, try to start the next message. */
|
|
if (si_sm_result == SI_SM_IDLE) {
|
|
smi_inc_stat(smi_info, idles);
|
|
|
|
si_sm_result = start_next_msg(smi_info);
|
|
if (si_sm_result != SI_SM_IDLE)
|
|
goto restart;
|
|
}
|
|
|
|
if ((si_sm_result == SI_SM_IDLE)
|
|
&& (atomic_read(&smi_info->req_events))) {
|
|
/*
|
|
* We are idle and the upper layer requested that I fetch
|
|
* events, so do so.
|
|
*/
|
|
atomic_set(&smi_info->req_events, 0);
|
|
|
|
/*
|
|
* Take this opportunity to check the interrupt and
|
|
* message enable state for the BMC. The BMC can be
|
|
* asynchronously reset, and may thus get interrupts
|
|
* disable and messages disabled.
|
|
*/
|
|
if (smi_info->supports_event_msg_buff || smi_info->irq) {
|
|
start_check_enables(smi_info, true);
|
|
} else {
|
|
smi_info->curr_msg = alloc_msg_handle_irq(smi_info);
|
|
if (!smi_info->curr_msg)
|
|
goto out;
|
|
|
|
start_getting_events(smi_info);
|
|
}
|
|
goto restart;
|
|
}
|
|
|
|
if (si_sm_result == SI_SM_IDLE && smi_info->timer_running) {
|
|
/* Ok it if fails, the timer will just go off. */
|
|
if (del_timer(&smi_info->si_timer))
|
|
smi_info->timer_running = false;
|
|
}
|
|
|
|
out:
|
|
return si_sm_result;
|
|
}
|
|
|
|
static void check_start_timer_thread(struct smi_info *smi_info)
|
|
{
|
|
if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
|
|
smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
|
|
|
|
if (smi_info->thread)
|
|
wake_up_process(smi_info->thread);
|
|
|
|
start_next_msg(smi_info);
|
|
smi_event_handler(smi_info, 0);
|
|
}
|
|
}
|
|
|
|
static void flush_messages(void *send_info)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
enum si_sm_result result;
|
|
|
|
/*
|
|
* Currently, this function is called only in run-to-completion
|
|
* mode. This means we are single-threaded, no need for locks.
|
|
*/
|
|
result = smi_event_handler(smi_info, 0);
|
|
while (result != SI_SM_IDLE) {
|
|
udelay(SI_SHORT_TIMEOUT_USEC);
|
|
result = smi_event_handler(smi_info, SI_SHORT_TIMEOUT_USEC);
|
|
}
|
|
}
|
|
|
|
static void sender(void *send_info,
|
|
struct ipmi_smi_msg *msg)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
unsigned long flags;
|
|
|
|
debug_timestamp("Enqueue");
|
|
|
|
if (smi_info->run_to_completion) {
|
|
/*
|
|
* If we are running to completion, start it. Upper
|
|
* layer will call flush_messages to clear it out.
|
|
*/
|
|
smi_info->waiting_msg = msg;
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&smi_info->si_lock, flags);
|
|
/*
|
|
* The following two lines don't need to be under the lock for
|
|
* the lock's sake, but they do need SMP memory barriers to
|
|
* avoid getting things out of order. We are already claiming
|
|
* the lock, anyway, so just do it under the lock to avoid the
|
|
* ordering problem.
|
|
*/
|
|
BUG_ON(smi_info->waiting_msg);
|
|
smi_info->waiting_msg = msg;
|
|
check_start_timer_thread(smi_info);
|
|
spin_unlock_irqrestore(&smi_info->si_lock, flags);
|
|
}
|
|
|
|
static void set_run_to_completion(void *send_info, bool i_run_to_completion)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
|
|
smi_info->run_to_completion = i_run_to_completion;
|
|
if (i_run_to_completion)
|
|
flush_messages(smi_info);
|
|
}
|
|
|
|
/*
|
|
* Use -1 in the nsec value of the busy waiting timespec to tell that
|
|
* we are spinning in kipmid looking for something and not delaying
|
|
* between checks
|
|
*/
|
|
static inline void ipmi_si_set_not_busy(struct timespec64 *ts)
|
|
{
|
|
ts->tv_nsec = -1;
|
|
}
|
|
static inline int ipmi_si_is_busy(struct timespec64 *ts)
|
|
{
|
|
return ts->tv_nsec != -1;
|
|
}
|
|
|
|
static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result,
|
|
const struct smi_info *smi_info,
|
|
struct timespec64 *busy_until)
|
|
{
|
|
unsigned int max_busy_us = 0;
|
|
|
|
if (smi_info->intf_num < num_max_busy_us)
|
|
max_busy_us = kipmid_max_busy_us[smi_info->intf_num];
|
|
if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
|
|
ipmi_si_set_not_busy(busy_until);
|
|
else if (!ipmi_si_is_busy(busy_until)) {
|
|
getnstimeofday64(busy_until);
|
|
timespec64_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
|
|
} else {
|
|
struct timespec64 now;
|
|
|
|
getnstimeofday64(&now);
|
|
if (unlikely(timespec64_compare(&now, busy_until) > 0)) {
|
|
ipmi_si_set_not_busy(busy_until);
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* A busy-waiting loop for speeding up IPMI operation.
|
|
*
|
|
* Lousy hardware makes this hard. This is only enabled for systems
|
|
* that are not BT and do not have interrupts. It starts spinning
|
|
* when an operation is complete or until max_busy tells it to stop
|
|
* (if that is enabled). See the paragraph on kimid_max_busy_us in
|
|
* Documentation/IPMI.txt for details.
|
|
*/
|
|
static int ipmi_thread(void *data)
|
|
{
|
|
struct smi_info *smi_info = data;
|
|
unsigned long flags;
|
|
enum si_sm_result smi_result;
|
|
struct timespec64 busy_until;
|
|
|
|
ipmi_si_set_not_busy(&busy_until);
|
|
set_user_nice(current, MAX_NICE);
|
|
while (!kthread_should_stop()) {
|
|
int busy_wait;
|
|
|
|
spin_lock_irqsave(&(smi_info->si_lock), flags);
|
|
smi_result = smi_event_handler(smi_info, 0);
|
|
|
|
/*
|
|
* If the driver is doing something, there is a possible
|
|
* race with the timer. If the timer handler see idle,
|
|
* and the thread here sees something else, the timer
|
|
* handler won't restart the timer even though it is
|
|
* required. So start it here if necessary.
|
|
*/
|
|
if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
|
|
smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
|
|
|
|
spin_unlock_irqrestore(&(smi_info->si_lock), flags);
|
|
busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
|
|
&busy_until);
|
|
if (smi_result == SI_SM_CALL_WITHOUT_DELAY)
|
|
; /* do nothing */
|
|
else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
|
|
schedule();
|
|
else if (smi_result == SI_SM_IDLE) {
|
|
if (atomic_read(&smi_info->need_watch)) {
|
|
schedule_timeout_interruptible(100);
|
|
} else {
|
|
/* Wait to be woken up when we are needed. */
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
schedule();
|
|
}
|
|
} else
|
|
schedule_timeout_interruptible(1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void poll(void *send_info)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
unsigned long flags = 0;
|
|
bool run_to_completion = smi_info->run_to_completion;
|
|
|
|
/*
|
|
* Make sure there is some delay in the poll loop so we can
|
|
* drive time forward and timeout things.
|
|
*/
|
|
udelay(10);
|
|
if (!run_to_completion)
|
|
spin_lock_irqsave(&smi_info->si_lock, flags);
|
|
smi_event_handler(smi_info, 10);
|
|
if (!run_to_completion)
|
|
spin_unlock_irqrestore(&smi_info->si_lock, flags);
|
|
}
|
|
|
|
static void request_events(void *send_info)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
|
|
if (!smi_info->has_event_buffer)
|
|
return;
|
|
|
|
atomic_set(&smi_info->req_events, 1);
|
|
}
|
|
|
|
static void set_need_watch(void *send_info, bool enable)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
unsigned long flags;
|
|
|
|
atomic_set(&smi_info->need_watch, enable);
|
|
spin_lock_irqsave(&smi_info->si_lock, flags);
|
|
check_start_timer_thread(smi_info);
|
|
spin_unlock_irqrestore(&smi_info->si_lock, flags);
|
|
}
|
|
|
|
static int initialized;
|
|
|
|
static void smi_timeout(unsigned long data)
|
|
{
|
|
struct smi_info *smi_info = (struct smi_info *) data;
|
|
enum si_sm_result smi_result;
|
|
unsigned long flags;
|
|
unsigned long jiffies_now;
|
|
long time_diff;
|
|
long timeout;
|
|
|
|
spin_lock_irqsave(&(smi_info->si_lock), flags);
|
|
debug_timestamp("Timer");
|
|
|
|
jiffies_now = jiffies;
|
|
time_diff = (((long)jiffies_now - (long)smi_info->last_timeout_jiffies)
|
|
* SI_USEC_PER_JIFFY);
|
|
smi_result = smi_event_handler(smi_info, time_diff);
|
|
|
|
if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
|
|
/* Running with interrupts, only do long timeouts. */
|
|
timeout = jiffies + SI_TIMEOUT_JIFFIES;
|
|
smi_inc_stat(smi_info, long_timeouts);
|
|
goto do_mod_timer;
|
|
}
|
|
|
|
/*
|
|
* If the state machine asks for a short delay, then shorten
|
|
* the timer timeout.
|
|
*/
|
|
if (smi_result == SI_SM_CALL_WITH_DELAY) {
|
|
smi_inc_stat(smi_info, short_timeouts);
|
|
timeout = jiffies + 1;
|
|
} else {
|
|
smi_inc_stat(smi_info, long_timeouts);
|
|
timeout = jiffies + SI_TIMEOUT_JIFFIES;
|
|
}
|
|
|
|
do_mod_timer:
|
|
if (smi_result != SI_SM_IDLE)
|
|
smi_mod_timer(smi_info, timeout);
|
|
else
|
|
smi_info->timer_running = false;
|
|
spin_unlock_irqrestore(&(smi_info->si_lock), flags);
|
|
}
|
|
|
|
static irqreturn_t si_irq_handler(int irq, void *data)
|
|
{
|
|
struct smi_info *smi_info = data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&(smi_info->si_lock), flags);
|
|
|
|
smi_inc_stat(smi_info, interrupts);
|
|
|
|
debug_timestamp("Interrupt");
|
|
|
|
smi_event_handler(smi_info, 0);
|
|
spin_unlock_irqrestore(&(smi_info->si_lock), flags);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t si_bt_irq_handler(int irq, void *data)
|
|
{
|
|
struct smi_info *smi_info = data;
|
|
/* We need to clear the IRQ flag for the BT interface. */
|
|
smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,
|
|
IPMI_BT_INTMASK_CLEAR_IRQ_BIT
|
|
| IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
|
|
return si_irq_handler(irq, data);
|
|
}
|
|
|
|
static int smi_start_processing(void *send_info,
|
|
ipmi_smi_t intf)
|
|
{
|
|
struct smi_info *new_smi = send_info;
|
|
int enable = 0;
|
|
|
|
new_smi->intf = intf;
|
|
|
|
/* Set up the timer that drives the interface. */
|
|
setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
|
|
smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
|
|
|
|
/* Try to claim any interrupts. */
|
|
if (new_smi->irq_setup)
|
|
new_smi->irq_setup(new_smi);
|
|
|
|
/*
|
|
* Check if the user forcefully enabled the daemon.
|
|
*/
|
|
if (new_smi->intf_num < num_force_kipmid)
|
|
enable = force_kipmid[new_smi->intf_num];
|
|
/*
|
|
* The BT interface is efficient enough to not need a thread,
|
|
* and there is no need for a thread if we have interrupts.
|
|
*/
|
|
else if ((new_smi->si_type != SI_BT) && (!new_smi->irq))
|
|
enable = 1;
|
|
|
|
if (enable) {
|
|
new_smi->thread = kthread_run(ipmi_thread, new_smi,
|
|
"kipmi%d", new_smi->intf_num);
|
|
if (IS_ERR(new_smi->thread)) {
|
|
dev_notice(new_smi->dev, "Could not start"
|
|
" kernel thread due to error %ld, only using"
|
|
" timers to drive the interface\n",
|
|
PTR_ERR(new_smi->thread));
|
|
new_smi->thread = NULL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
|
|
{
|
|
struct smi_info *smi = send_info;
|
|
|
|
data->addr_src = smi->addr_source;
|
|
data->dev = smi->dev;
|
|
data->addr_info = smi->addr_info;
|
|
get_device(smi->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void set_maintenance_mode(void *send_info, bool enable)
|
|
{
|
|
struct smi_info *smi_info = send_info;
|
|
|
|
if (!enable)
|
|
atomic_set(&smi_info->req_events, 0);
|
|
}
|
|
|
|
static const struct ipmi_smi_handlers handlers = {
|
|
.owner = THIS_MODULE,
|
|
.start_processing = smi_start_processing,
|
|
.get_smi_info = get_smi_info,
|
|
.sender = sender,
|
|
.request_events = request_events,
|
|
.set_need_watch = set_need_watch,
|
|
.set_maintenance_mode = set_maintenance_mode,
|
|
.set_run_to_completion = set_run_to_completion,
|
|
.flush_messages = flush_messages,
|
|
.poll = poll,
|
|
};
|
|
|
|
/*
|
|
* There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
|
|
* a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
|
|
*/
|
|
|
|
static LIST_HEAD(smi_infos);
|
|
static DEFINE_MUTEX(smi_infos_lock);
|
|
static int smi_num; /* Used to sequence the SMIs */
|
|
|
|
#define DEFAULT_REGSPACING 1
|
|
#define DEFAULT_REGSIZE 1
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static bool si_tryacpi = true;
|
|
#endif
|
|
#ifdef CONFIG_DMI
|
|
static bool si_trydmi = true;
|
|
#endif
|
|
static bool si_tryplatform = true;
|
|
#ifdef CONFIG_PCI
|
|
static bool si_trypci = true;
|
|
#endif
|
|
static bool si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
|
|
static char *si_type[SI_MAX_PARMS];
|
|
#define MAX_SI_TYPE_STR 30
|
|
static char si_type_str[MAX_SI_TYPE_STR];
|
|
static unsigned long addrs[SI_MAX_PARMS];
|
|
static unsigned int num_addrs;
|
|
static unsigned int ports[SI_MAX_PARMS];
|
|
static unsigned int num_ports;
|
|
static int irqs[SI_MAX_PARMS];
|
|
static unsigned int num_irqs;
|
|
static int regspacings[SI_MAX_PARMS];
|
|
static unsigned int num_regspacings;
|
|
static int regsizes[SI_MAX_PARMS];
|
|
static unsigned int num_regsizes;
|
|
static int regshifts[SI_MAX_PARMS];
|
|
static unsigned int num_regshifts;
|
|
static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
|
|
static unsigned int num_slave_addrs;
|
|
|
|
#define IPMI_IO_ADDR_SPACE 0
|
|
#define IPMI_MEM_ADDR_SPACE 1
|
|
static const char * const addr_space_to_str[] = { "i/o", "mem" };
|
|
|
|
static int hotmod_handler(const char *val, struct kernel_param *kp);
|
|
|
|
module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);
|
|
MODULE_PARM_DESC(hotmod, "Add and remove interfaces. See"
|
|
" Documentation/IPMI.txt in the kernel sources for the"
|
|
" gory details.");
|
|
|
|
#ifdef CONFIG_ACPI
|
|
module_param_named(tryacpi, si_tryacpi, bool, 0);
|
|
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via ACPI");
|
|
#endif
|
|
#ifdef CONFIG_DMI
|
|
module_param_named(trydmi, si_trydmi, bool, 0);
|
|
MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via DMI");
|
|
#endif
|
|
module_param_named(tryplatform, si_tryplatform, bool, 0);
|
|
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via platform"
|
|
" interfaces like openfirmware");
|
|
#ifdef CONFIG_PCI
|
|
module_param_named(trypci, si_trypci, bool, 0);
|
|
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via pci");
|
|
#endif
|
|
module_param_named(trydefaults, si_trydefaults, bool, 0);
|
|
MODULE_PARM_DESC(trydefaults, "Setting this to 'false' will disable the"
|
|
" default scan of the KCS and SMIC interface at the standard"
|
|
" address");
|
|
module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
|
|
MODULE_PARM_DESC(type, "Defines the type of each interface, each"
|
|
" interface separated by commas. The types are 'kcs',"
|
|
" 'smic', and 'bt'. For example si_type=kcs,bt will set"
|
|
" the first interface to kcs and the second to bt");
|
|
module_param_array(addrs, ulong, &num_addrs, 0);
|
|
MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
|
|
" addresses separated by commas. Only use if an interface"
|
|
" is in memory. Otherwise, set it to zero or leave"
|
|
" it blank.");
|
|
module_param_array(ports, uint, &num_ports, 0);
|
|
MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
|
|
" addresses separated by commas. Only use if an interface"
|
|
" is a port. Otherwise, set it to zero or leave"
|
|
" it blank.");
|
|
module_param_array(irqs, int, &num_irqs, 0);
|
|
MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
|
|
" addresses separated by commas. Only use if an interface"
|
|
" has an interrupt. Otherwise, set it to zero or leave"
|
|
" it blank.");
|
|
module_param_array(regspacings, int, &num_regspacings, 0);
|
|
MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
|
|
" and each successive register used by the interface. For"
|
|
" instance, if the start address is 0xca2 and the spacing"
|
|
" is 2, then the second address is at 0xca4. Defaults"
|
|
" to 1.");
|
|
module_param_array(regsizes, int, &num_regsizes, 0);
|
|
MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
|
|
" This should generally be 1, 2, 4, or 8 for an 8-bit,"
|
|
" 16-bit, 32-bit, or 64-bit register. Use this if you"
|
|
" the 8-bit IPMI register has to be read from a larger"
|
|
" register.");
|
|
module_param_array(regshifts, int, &num_regshifts, 0);
|
|
MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
|
|
" IPMI register, in bits. For instance, if the data"
|
|
" is read from a 32-bit word and the IPMI data is in"
|
|
" bit 8-15, then the shift would be 8");
|
|
module_param_array(slave_addrs, int, &num_slave_addrs, 0);
|
|
MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
|
|
" the controller. Normally this is 0x20, but can be"
|
|
" overridden by this parm. This is an array indexed"
|
|
" by interface number.");
|
|
module_param_array(force_kipmid, int, &num_force_kipmid, 0);
|
|
MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
|
|
" disabled(0). Normally the IPMI driver auto-detects"
|
|
" this, but the value may be overridden by this parm.");
|
|
module_param(unload_when_empty, bool, 0);
|
|
MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
|
|
" specified or found, default is 1. Setting to 0"
|
|
" is useful for hot add of devices using hotmod.");
|
|
module_param_array(kipmid_max_busy_us, uint, &num_max_busy_us, 0644);
|
|
MODULE_PARM_DESC(kipmid_max_busy_us,
|
|
"Max time (in microseconds) to busy-wait for IPMI data before"
|
|
" sleeping. 0 (default) means to wait forever. Set to 100-500"
|
|
" if kipmid is using up a lot of CPU time.");
|
|
|
|
|
|
static void std_irq_cleanup(struct smi_info *info)
|
|
{
|
|
if (info->si_type == SI_BT)
|
|
/* Disable the interrupt in the BT interface. */
|
|
info->io.outputb(&info->io, IPMI_BT_INTMASK_REG, 0);
|
|
free_irq(info->irq, info);
|
|
}
|
|
|
|
static int std_irq_setup(struct smi_info *info)
|
|
{
|
|
int rv;
|
|
|
|
if (!info->irq)
|
|
return 0;
|
|
|
|
if (info->si_type == SI_BT) {
|
|
rv = request_irq(info->irq,
|
|
si_bt_irq_handler,
|
|
IRQF_SHARED,
|
|
DEVICE_NAME,
|
|
info);
|
|
if (!rv)
|
|
/* Enable the interrupt in the BT interface. */
|
|
info->io.outputb(&info->io, IPMI_BT_INTMASK_REG,
|
|
IPMI_BT_INTMASK_ENABLE_IRQ_BIT);
|
|
} else
|
|
rv = request_irq(info->irq,
|
|
si_irq_handler,
|
|
IRQF_SHARED,
|
|
DEVICE_NAME,
|
|
info);
|
|
if (rv) {
|
|
dev_warn(info->dev, "%s unable to claim interrupt %d,"
|
|
" running polled\n",
|
|
DEVICE_NAME, info->irq);
|
|
info->irq = 0;
|
|
} else {
|
|
info->irq_cleanup = std_irq_cleanup;
|
|
dev_info(info->dev, "Using irq %d\n", info->irq);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static unsigned char port_inb(const struct si_sm_io *io, unsigned int offset)
|
|
{
|
|
unsigned int addr = io->addr_data;
|
|
|
|
return inb(addr + (offset * io->regspacing));
|
|
}
|
|
|
|
static void port_outb(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
unsigned int addr = io->addr_data;
|
|
|
|
outb(b, addr + (offset * io->regspacing));
|
|
}
|
|
|
|
static unsigned char port_inw(const struct si_sm_io *io, unsigned int offset)
|
|
{
|
|
unsigned int addr = io->addr_data;
|
|
|
|
return (inw(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
|
|
}
|
|
|
|
static void port_outw(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
unsigned int addr = io->addr_data;
|
|
|
|
outw(b << io->regshift, addr + (offset * io->regspacing));
|
|
}
|
|
|
|
static unsigned char port_inl(const struct si_sm_io *io, unsigned int offset)
|
|
{
|
|
unsigned int addr = io->addr_data;
|
|
|
|
return (inl(addr + (offset * io->regspacing)) >> io->regshift) & 0xff;
|
|
}
|
|
|
|
static void port_outl(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
unsigned int addr = io->addr_data;
|
|
|
|
outl(b << io->regshift, addr+(offset * io->regspacing));
|
|
}
|
|
|
|
static void port_cleanup(struct smi_info *info)
|
|
{
|
|
unsigned int addr = info->io.addr_data;
|
|
int idx;
|
|
|
|
if (addr) {
|
|
for (idx = 0; idx < info->io_size; idx++)
|
|
release_region(addr + idx * info->io.regspacing,
|
|
info->io.regsize);
|
|
}
|
|
}
|
|
|
|
static int port_setup(struct smi_info *info)
|
|
{
|
|
unsigned int addr = info->io.addr_data;
|
|
int idx;
|
|
|
|
if (!addr)
|
|
return -ENODEV;
|
|
|
|
info->io_cleanup = port_cleanup;
|
|
|
|
/*
|
|
* Figure out the actual inb/inw/inl/etc routine to use based
|
|
* upon the register size.
|
|
*/
|
|
switch (info->io.regsize) {
|
|
case 1:
|
|
info->io.inputb = port_inb;
|
|
info->io.outputb = port_outb;
|
|
break;
|
|
case 2:
|
|
info->io.inputb = port_inw;
|
|
info->io.outputb = port_outw;
|
|
break;
|
|
case 4:
|
|
info->io.inputb = port_inl;
|
|
info->io.outputb = port_outl;
|
|
break;
|
|
default:
|
|
dev_warn(info->dev, "Invalid register size: %d\n",
|
|
info->io.regsize);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Some BIOSes reserve disjoint I/O regions in their ACPI
|
|
* tables. This causes problems when trying to register the
|
|
* entire I/O region. Therefore we must register each I/O
|
|
* port separately.
|
|
*/
|
|
for (idx = 0; idx < info->io_size; idx++) {
|
|
if (request_region(addr + idx * info->io.regspacing,
|
|
info->io.regsize, DEVICE_NAME) == NULL) {
|
|
/* Undo allocations */
|
|
while (idx--) {
|
|
release_region(addr + idx * info->io.regspacing,
|
|
info->io.regsize);
|
|
}
|
|
return -EIO;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static unsigned char intf_mem_inb(const struct si_sm_io *io,
|
|
unsigned int offset)
|
|
{
|
|
return readb((io->addr)+(offset * io->regspacing));
|
|
}
|
|
|
|
static void intf_mem_outb(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
writeb(b, (io->addr)+(offset * io->regspacing));
|
|
}
|
|
|
|
static unsigned char intf_mem_inw(const struct si_sm_io *io,
|
|
unsigned int offset)
|
|
{
|
|
return (readw((io->addr)+(offset * io->regspacing)) >> io->regshift)
|
|
& 0xff;
|
|
}
|
|
|
|
static void intf_mem_outw(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
writeb(b << io->regshift, (io->addr)+(offset * io->regspacing));
|
|
}
|
|
|
|
static unsigned char intf_mem_inl(const struct si_sm_io *io,
|
|
unsigned int offset)
|
|
{
|
|
return (readl((io->addr)+(offset * io->regspacing)) >> io->regshift)
|
|
& 0xff;
|
|
}
|
|
|
|
static void intf_mem_outl(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
writel(b << io->regshift, (io->addr)+(offset * io->regspacing));
|
|
}
|
|
|
|
#ifdef readq
|
|
static unsigned char mem_inq(const struct si_sm_io *io, unsigned int offset)
|
|
{
|
|
return (readq((io->addr)+(offset * io->regspacing)) >> io->regshift)
|
|
& 0xff;
|
|
}
|
|
|
|
static void mem_outq(const struct si_sm_io *io, unsigned int offset,
|
|
unsigned char b)
|
|
{
|
|
writeq(b << io->regshift, (io->addr)+(offset * io->regspacing));
|
|
}
|
|
#endif
|
|
|
|
static void mem_cleanup(struct smi_info *info)
|
|
{
|
|
unsigned long addr = info->io.addr_data;
|
|
int mapsize;
|
|
|
|
if (info->io.addr) {
|
|
iounmap(info->io.addr);
|
|
|
|
mapsize = ((info->io_size * info->io.regspacing)
|
|
- (info->io.regspacing - info->io.regsize));
|
|
|
|
release_mem_region(addr, mapsize);
|
|
}
|
|
}
|
|
|
|
static int mem_setup(struct smi_info *info)
|
|
{
|
|
unsigned long addr = info->io.addr_data;
|
|
int mapsize;
|
|
|
|
if (!addr)
|
|
return -ENODEV;
|
|
|
|
info->io_cleanup = mem_cleanup;
|
|
|
|
/*
|
|
* Figure out the actual readb/readw/readl/etc routine to use based
|
|
* upon the register size.
|
|
*/
|
|
switch (info->io.regsize) {
|
|
case 1:
|
|
info->io.inputb = intf_mem_inb;
|
|
info->io.outputb = intf_mem_outb;
|
|
break;
|
|
case 2:
|
|
info->io.inputb = intf_mem_inw;
|
|
info->io.outputb = intf_mem_outw;
|
|
break;
|
|
case 4:
|
|
info->io.inputb = intf_mem_inl;
|
|
info->io.outputb = intf_mem_outl;
|
|
break;
|
|
#ifdef readq
|
|
case 8:
|
|
info->io.inputb = mem_inq;
|
|
info->io.outputb = mem_outq;
|
|
break;
|
|
#endif
|
|
default:
|
|
dev_warn(info->dev, "Invalid register size: %d\n",
|
|
info->io.regsize);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Calculate the total amount of memory to claim. This is an
|
|
* unusual looking calculation, but it avoids claiming any
|
|
* more memory than it has to. It will claim everything
|
|
* between the first address to the end of the last full
|
|
* register.
|
|
*/
|
|
mapsize = ((info->io_size * info->io.regspacing)
|
|
- (info->io.regspacing - info->io.regsize));
|
|
|
|
if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
|
|
return -EIO;
|
|
|
|
info->io.addr = ioremap(addr, mapsize);
|
|
if (info->io.addr == NULL) {
|
|
release_mem_region(addr, mapsize);
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Parms come in as <op1>[:op2[:op3...]]. ops are:
|
|
* add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
|
|
* Options are:
|
|
* rsp=<regspacing>
|
|
* rsi=<regsize>
|
|
* rsh=<regshift>
|
|
* irq=<irq>
|
|
* ipmb=<ipmb addr>
|
|
*/
|
|
enum hotmod_op { HM_ADD, HM_REMOVE };
|
|
struct hotmod_vals {
|
|
const char *name;
|
|
const int val;
|
|
};
|
|
|
|
static const struct hotmod_vals hotmod_ops[] = {
|
|
{ "add", HM_ADD },
|
|
{ "remove", HM_REMOVE },
|
|
{ NULL }
|
|
};
|
|
|
|
static const struct hotmod_vals hotmod_si[] = {
|
|
{ "kcs", SI_KCS },
|
|
{ "smic", SI_SMIC },
|
|
{ "bt", SI_BT },
|
|
{ NULL }
|
|
};
|
|
|
|
static const struct hotmod_vals hotmod_as[] = {
|
|
{ "mem", IPMI_MEM_ADDR_SPACE },
|
|
{ "i/o", IPMI_IO_ADDR_SPACE },
|
|
{ NULL }
|
|
};
|
|
|
|
static int parse_str(const struct hotmod_vals *v, int *val, char *name,
|
|
char **curr)
|
|
{
|
|
char *s;
|
|
int i;
|
|
|
|
s = strchr(*curr, ',');
|
|
if (!s) {
|
|
printk(KERN_WARNING PFX "No hotmod %s given.\n", name);
|
|
return -EINVAL;
|
|
}
|
|
*s = '\0';
|
|
s++;
|
|
for (i = 0; v[i].name; i++) {
|
|
if (strcmp(*curr, v[i].name) == 0) {
|
|
*val = v[i].val;
|
|
*curr = s;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
printk(KERN_WARNING PFX "Invalid hotmod %s '%s'\n", name, *curr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int check_hotmod_int_op(const char *curr, const char *option,
|
|
const char *name, int *val)
|
|
{
|
|
char *n;
|
|
|
|
if (strcmp(curr, name) == 0) {
|
|
if (!option) {
|
|
printk(KERN_WARNING PFX
|
|
"No option given for '%s'\n",
|
|
curr);
|
|
return -EINVAL;
|
|
}
|
|
*val = simple_strtoul(option, &n, 0);
|
|
if ((*n != '\0') || (*option == '\0')) {
|
|
printk(KERN_WARNING PFX
|
|
"Bad option given for '%s'\n",
|
|
curr);
|
|
return -EINVAL;
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct smi_info *smi_info_alloc(void)
|
|
{
|
|
struct smi_info *info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
|
|
if (info)
|
|
spin_lock_init(&info->si_lock);
|
|
return info;
|
|
}
|
|
|
|
static int hotmod_handler(const char *val, struct kernel_param *kp)
|
|
{
|
|
char *str = kstrdup(val, GFP_KERNEL);
|
|
int rv;
|
|
char *next, *curr, *s, *n, *o;
|
|
enum hotmod_op op;
|
|
enum si_type si_type;
|
|
int addr_space;
|
|
unsigned long addr;
|
|
int regspacing;
|
|
int regsize;
|
|
int regshift;
|
|
int irq;
|
|
int ipmb;
|
|
int ival;
|
|
int len;
|
|
struct smi_info *info;
|
|
|
|
if (!str)
|
|
return -ENOMEM;
|
|
|
|
/* Kill any trailing spaces, as we can get a "\n" from echo. */
|
|
len = strlen(str);
|
|
ival = len - 1;
|
|
while ((ival >= 0) && isspace(str[ival])) {
|
|
str[ival] = '\0';
|
|
ival--;
|
|
}
|
|
|
|
for (curr = str; curr; curr = next) {
|
|
regspacing = 1;
|
|
regsize = 1;
|
|
regshift = 0;
|
|
irq = 0;
|
|
ipmb = 0; /* Choose the default if not specified */
|
|
|
|
next = strchr(curr, ':');
|
|
if (next) {
|
|
*next = '\0';
|
|
next++;
|
|
}
|
|
|
|
rv = parse_str(hotmod_ops, &ival, "operation", &curr);
|
|
if (rv)
|
|
break;
|
|
op = ival;
|
|
|
|
rv = parse_str(hotmod_si, &ival, "interface type", &curr);
|
|
if (rv)
|
|
break;
|
|
si_type = ival;
|
|
|
|
rv = parse_str(hotmod_as, &addr_space, "address space", &curr);
|
|
if (rv)
|
|
break;
|
|
|
|
s = strchr(curr, ',');
|
|
if (s) {
|
|
*s = '\0';
|
|
s++;
|
|
}
|
|
addr = simple_strtoul(curr, &n, 0);
|
|
if ((*n != '\0') || (*curr == '\0')) {
|
|
printk(KERN_WARNING PFX "Invalid hotmod address"
|
|
" '%s'\n", curr);
|
|
break;
|
|
}
|
|
|
|
while (s) {
|
|
curr = s;
|
|
s = strchr(curr, ',');
|
|
if (s) {
|
|
*s = '\0';
|
|
s++;
|
|
}
|
|
o = strchr(curr, '=');
|
|
if (o) {
|
|
*o = '\0';
|
|
o++;
|
|
}
|
|
rv = check_hotmod_int_op(curr, o, "rsp", ®spacing);
|
|
if (rv < 0)
|
|
goto out;
|
|
else if (rv)
|
|
continue;
|
|
rv = check_hotmod_int_op(curr, o, "rsi", ®size);
|
|
if (rv < 0)
|
|
goto out;
|
|
else if (rv)
|
|
continue;
|
|
rv = check_hotmod_int_op(curr, o, "rsh", ®shift);
|
|
if (rv < 0)
|
|
goto out;
|
|
else if (rv)
|
|
continue;
|
|
rv = check_hotmod_int_op(curr, o, "irq", &irq);
|
|
if (rv < 0)
|
|
goto out;
|
|
else if (rv)
|
|
continue;
|
|
rv = check_hotmod_int_op(curr, o, "ipmb", &ipmb);
|
|
if (rv < 0)
|
|
goto out;
|
|
else if (rv)
|
|
continue;
|
|
|
|
rv = -EINVAL;
|
|
printk(KERN_WARNING PFX
|
|
"Invalid hotmod option '%s'\n",
|
|
curr);
|
|
goto out;
|
|
}
|
|
|
|
if (op == HM_ADD) {
|
|
info = smi_info_alloc();
|
|
if (!info) {
|
|
rv = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
info->addr_source = SI_HOTMOD;
|
|
info->si_type = si_type;
|
|
info->io.addr_data = addr;
|
|
info->io.addr_type = addr_space;
|
|
if (addr_space == IPMI_MEM_ADDR_SPACE)
|
|
info->io_setup = mem_setup;
|
|
else
|
|
info->io_setup = port_setup;
|
|
|
|
info->io.addr = NULL;
|
|
info->io.regspacing = regspacing;
|
|
if (!info->io.regspacing)
|
|
info->io.regspacing = DEFAULT_REGSPACING;
|
|
info->io.regsize = regsize;
|
|
if (!info->io.regsize)
|
|
info->io.regsize = DEFAULT_REGSPACING;
|
|
info->io.regshift = regshift;
|
|
info->irq = irq;
|
|
if (info->irq)
|
|
info->irq_setup = std_irq_setup;
|
|
info->slave_addr = ipmb;
|
|
|
|
rv = add_smi(info);
|
|
if (rv) {
|
|
kfree(info);
|
|
goto out;
|
|
}
|
|
rv = try_smi_init(info);
|
|
if (rv) {
|
|
cleanup_one_si(info);
|
|
goto out;
|
|
}
|
|
} else {
|
|
/* remove */
|
|
struct smi_info *e, *tmp_e;
|
|
|
|
mutex_lock(&smi_infos_lock);
|
|
list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
|
|
if (e->io.addr_type != addr_space)
|
|
continue;
|
|
if (e->si_type != si_type)
|
|
continue;
|
|
if (e->io.addr_data == addr)
|
|
cleanup_one_si(e);
|
|
}
|
|
mutex_unlock(&smi_infos_lock);
|
|
}
|
|
}
|
|
rv = len;
|
|
out:
|
|
kfree(str);
|
|
return rv;
|
|
}
|
|
|
|
static int hardcode_find_bmc(void)
|
|
{
|
|
int ret = -ENODEV;
|
|
int i;
|
|
struct smi_info *info;
|
|
|
|
for (i = 0; i < SI_MAX_PARMS; i++) {
|
|
if (!ports[i] && !addrs[i])
|
|
continue;
|
|
|
|
info = smi_info_alloc();
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->addr_source = SI_HARDCODED;
|
|
printk(KERN_INFO PFX "probing via hardcoded address\n");
|
|
|
|
if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
|
|
info->si_type = SI_KCS;
|
|
} else if (strcmp(si_type[i], "smic") == 0) {
|
|
info->si_type = SI_SMIC;
|
|
} else if (strcmp(si_type[i], "bt") == 0) {
|
|
info->si_type = SI_BT;
|
|
} else {
|
|
printk(KERN_WARNING PFX "Interface type specified "
|
|
"for interface %d, was invalid: %s\n",
|
|
i, si_type[i]);
|
|
kfree(info);
|
|
continue;
|
|
}
|
|
|
|
if (ports[i]) {
|
|
/* An I/O port */
|
|
info->io_setup = port_setup;
|
|
info->io.addr_data = ports[i];
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
} else if (addrs[i]) {
|
|
/* A memory port */
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_data = addrs[i];
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
} else {
|
|
printk(KERN_WARNING PFX "Interface type specified "
|
|
"for interface %d, but port and address were "
|
|
"not set or set to zero.\n", i);
|
|
kfree(info);
|
|
continue;
|
|
}
|
|
|
|
info->io.addr = NULL;
|
|
info->io.regspacing = regspacings[i];
|
|
if (!info->io.regspacing)
|
|
info->io.regspacing = DEFAULT_REGSPACING;
|
|
info->io.regsize = regsizes[i];
|
|
if (!info->io.regsize)
|
|
info->io.regsize = DEFAULT_REGSPACING;
|
|
info->io.regshift = regshifts[i];
|
|
info->irq = irqs[i];
|
|
if (info->irq)
|
|
info->irq_setup = std_irq_setup;
|
|
info->slave_addr = slave_addrs[i];
|
|
|
|
if (!add_smi(info)) {
|
|
if (try_smi_init(info))
|
|
cleanup_one_si(info);
|
|
ret = 0;
|
|
} else {
|
|
kfree(info);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
|
|
#include <linux/acpi.h>
|
|
|
|
/*
|
|
* Once we get an ACPI failure, we don't try any more, because we go
|
|
* through the tables sequentially. Once we don't find a table, there
|
|
* are no more.
|
|
*/
|
|
static int acpi_failure;
|
|
|
|
/* For GPE-type interrupts. */
|
|
static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
|
|
u32 gpe_number, void *context)
|
|
{
|
|
struct smi_info *smi_info = context;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&(smi_info->si_lock), flags);
|
|
|
|
smi_inc_stat(smi_info, interrupts);
|
|
|
|
debug_timestamp("ACPI_GPE");
|
|
|
|
smi_event_handler(smi_info, 0);
|
|
spin_unlock_irqrestore(&(smi_info->si_lock), flags);
|
|
|
|
return ACPI_INTERRUPT_HANDLED;
|
|
}
|
|
|
|
static void acpi_gpe_irq_cleanup(struct smi_info *info)
|
|
{
|
|
if (!info->irq)
|
|
return;
|
|
|
|
acpi_remove_gpe_handler(NULL, info->irq, &ipmi_acpi_gpe);
|
|
}
|
|
|
|
static int acpi_gpe_irq_setup(struct smi_info *info)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!info->irq)
|
|
return 0;
|
|
|
|
status = acpi_install_gpe_handler(NULL,
|
|
info->irq,
|
|
ACPI_GPE_LEVEL_TRIGGERED,
|
|
&ipmi_acpi_gpe,
|
|
info);
|
|
if (status != AE_OK) {
|
|
dev_warn(info->dev, "%s unable to claim ACPI GPE %d,"
|
|
" running polled\n", DEVICE_NAME, info->irq);
|
|
info->irq = 0;
|
|
return -EINVAL;
|
|
} else {
|
|
info->irq_cleanup = acpi_gpe_irq_cleanup;
|
|
dev_info(info->dev, "Using ACPI GPE %d\n", info->irq);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Defined at
|
|
* http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
|
|
*/
|
|
struct SPMITable {
|
|
s8 Signature[4];
|
|
u32 Length;
|
|
u8 Revision;
|
|
u8 Checksum;
|
|
s8 OEMID[6];
|
|
s8 OEMTableID[8];
|
|
s8 OEMRevision[4];
|
|
s8 CreatorID[4];
|
|
s8 CreatorRevision[4];
|
|
u8 InterfaceType;
|
|
u8 IPMIlegacy;
|
|
s16 SpecificationRevision;
|
|
|
|
/*
|
|
* Bit 0 - SCI interrupt supported
|
|
* Bit 1 - I/O APIC/SAPIC
|
|
*/
|
|
u8 InterruptType;
|
|
|
|
/*
|
|
* If bit 0 of InterruptType is set, then this is the SCI
|
|
* interrupt in the GPEx_STS register.
|
|
*/
|
|
u8 GPE;
|
|
|
|
s16 Reserved;
|
|
|
|
/*
|
|
* If bit 1 of InterruptType is set, then this is the I/O
|
|
* APIC/SAPIC interrupt.
|
|
*/
|
|
u32 GlobalSystemInterrupt;
|
|
|
|
/* The actual register address. */
|
|
struct acpi_generic_address addr;
|
|
|
|
u8 UID[4];
|
|
|
|
s8 spmi_id[1]; /* A '\0' terminated array starts here. */
|
|
};
|
|
|
|
static int try_init_spmi(struct SPMITable *spmi)
|
|
{
|
|
struct smi_info *info;
|
|
int rv;
|
|
|
|
if (spmi->IPMIlegacy != 1) {
|
|
printk(KERN_INFO PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
|
|
return -ENODEV;
|
|
}
|
|
|
|
info = smi_info_alloc();
|
|
if (!info) {
|
|
printk(KERN_ERR PFX "Could not allocate SI data (3)\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->addr_source = SI_SPMI;
|
|
printk(KERN_INFO PFX "probing via SPMI\n");
|
|
|
|
/* Figure out the interface type. */
|
|
switch (spmi->InterfaceType) {
|
|
case 1: /* KCS */
|
|
info->si_type = SI_KCS;
|
|
break;
|
|
case 2: /* SMIC */
|
|
info->si_type = SI_SMIC;
|
|
break;
|
|
case 3: /* BT */
|
|
info->si_type = SI_BT;
|
|
break;
|
|
case 4: /* SSIF, just ignore */
|
|
kfree(info);
|
|
return -EIO;
|
|
default:
|
|
printk(KERN_INFO PFX "Unknown ACPI/SPMI SI type %d\n",
|
|
spmi->InterfaceType);
|
|
kfree(info);
|
|
return -EIO;
|
|
}
|
|
|
|
if (spmi->InterruptType & 1) {
|
|
/* We've got a GPE interrupt. */
|
|
info->irq = spmi->GPE;
|
|
info->irq_setup = acpi_gpe_irq_setup;
|
|
} else if (spmi->InterruptType & 2) {
|
|
/* We've got an APIC/SAPIC interrupt. */
|
|
info->irq = spmi->GlobalSystemInterrupt;
|
|
info->irq_setup = std_irq_setup;
|
|
} else {
|
|
/* Use the default interrupt setting. */
|
|
info->irq = 0;
|
|
info->irq_setup = NULL;
|
|
}
|
|
|
|
if (spmi->addr.bit_width) {
|
|
/* A (hopefully) properly formed register bit width. */
|
|
info->io.regspacing = spmi->addr.bit_width / 8;
|
|
} else {
|
|
info->io.regspacing = DEFAULT_REGSPACING;
|
|
}
|
|
info->io.regsize = info->io.regspacing;
|
|
info->io.regshift = spmi->addr.bit_offset;
|
|
|
|
if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
} else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
|
|
info->io_setup = port_setup;
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
} else {
|
|
kfree(info);
|
|
printk(KERN_WARNING PFX "Unknown ACPI I/O Address type\n");
|
|
return -EIO;
|
|
}
|
|
info->io.addr_data = spmi->addr.address;
|
|
|
|
pr_info("ipmi_si: SPMI: %s %#lx regsize %d spacing %d irq %d\n",
|
|
(info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
|
|
info->io.addr_data, info->io.regsize, info->io.regspacing,
|
|
info->irq);
|
|
|
|
rv = add_smi(info);
|
|
if (rv)
|
|
kfree(info);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void spmi_find_bmc(void)
|
|
{
|
|
acpi_status status;
|
|
struct SPMITable *spmi;
|
|
int i;
|
|
|
|
if (acpi_disabled)
|
|
return;
|
|
|
|
if (acpi_failure)
|
|
return;
|
|
|
|
for (i = 0; ; i++) {
|
|
status = acpi_get_table(ACPI_SIG_SPMI, i+1,
|
|
(struct acpi_table_header **)&spmi);
|
|
if (status != AE_OK)
|
|
return;
|
|
|
|
try_init_spmi(spmi);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_DMI
|
|
struct dmi_ipmi_data {
|
|
u8 type;
|
|
u8 addr_space;
|
|
unsigned long base_addr;
|
|
u8 irq;
|
|
u8 offset;
|
|
u8 slave_addr;
|
|
};
|
|
|
|
static int decode_dmi(const struct dmi_header *dm,
|
|
struct dmi_ipmi_data *dmi)
|
|
{
|
|
const u8 *data = (const u8 *)dm;
|
|
unsigned long base_addr;
|
|
u8 reg_spacing;
|
|
u8 len = dm->length;
|
|
|
|
dmi->type = data[4];
|
|
|
|
memcpy(&base_addr, data+8, sizeof(unsigned long));
|
|
if (len >= 0x11) {
|
|
if (base_addr & 1) {
|
|
/* I/O */
|
|
base_addr &= 0xFFFE;
|
|
dmi->addr_space = IPMI_IO_ADDR_SPACE;
|
|
} else
|
|
/* Memory */
|
|
dmi->addr_space = IPMI_MEM_ADDR_SPACE;
|
|
|
|
/* If bit 4 of byte 0x10 is set, then the lsb for the address
|
|
is odd. */
|
|
dmi->base_addr = base_addr | ((data[0x10] & 0x10) >> 4);
|
|
|
|
dmi->irq = data[0x11];
|
|
|
|
/* The top two bits of byte 0x10 hold the register spacing. */
|
|
reg_spacing = (data[0x10] & 0xC0) >> 6;
|
|
switch (reg_spacing) {
|
|
case 0x00: /* Byte boundaries */
|
|
dmi->offset = 1;
|
|
break;
|
|
case 0x01: /* 32-bit boundaries */
|
|
dmi->offset = 4;
|
|
break;
|
|
case 0x02: /* 16-byte boundaries */
|
|
dmi->offset = 16;
|
|
break;
|
|
default:
|
|
/* Some other interface, just ignore it. */
|
|
return -EIO;
|
|
}
|
|
} else {
|
|
/* Old DMI spec. */
|
|
/*
|
|
* Note that technically, the lower bit of the base
|
|
* address should be 1 if the address is I/O and 0 if
|
|
* the address is in memory. So many systems get that
|
|
* wrong (and all that I have seen are I/O) so we just
|
|
* ignore that bit and assume I/O. Systems that use
|
|
* memory should use the newer spec, anyway.
|
|
*/
|
|
dmi->base_addr = base_addr & 0xfffe;
|
|
dmi->addr_space = IPMI_IO_ADDR_SPACE;
|
|
dmi->offset = 1;
|
|
}
|
|
|
|
dmi->slave_addr = data[6];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
|
|
{
|
|
struct smi_info *info;
|
|
|
|
info = smi_info_alloc();
|
|
if (!info) {
|
|
printk(KERN_ERR PFX "Could not allocate SI data\n");
|
|
return;
|
|
}
|
|
|
|
info->addr_source = SI_SMBIOS;
|
|
printk(KERN_INFO PFX "probing via SMBIOS\n");
|
|
|
|
switch (ipmi_data->type) {
|
|
case 0x01: /* KCS */
|
|
info->si_type = SI_KCS;
|
|
break;
|
|
case 0x02: /* SMIC */
|
|
info->si_type = SI_SMIC;
|
|
break;
|
|
case 0x03: /* BT */
|
|
info->si_type = SI_BT;
|
|
break;
|
|
default:
|
|
kfree(info);
|
|
return;
|
|
}
|
|
|
|
switch (ipmi_data->addr_space) {
|
|
case IPMI_MEM_ADDR_SPACE:
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
break;
|
|
|
|
case IPMI_IO_ADDR_SPACE:
|
|
info->io_setup = port_setup;
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
break;
|
|
|
|
default:
|
|
kfree(info);
|
|
printk(KERN_WARNING PFX "Unknown SMBIOS I/O Address type: %d\n",
|
|
ipmi_data->addr_space);
|
|
return;
|
|
}
|
|
info->io.addr_data = ipmi_data->base_addr;
|
|
|
|
info->io.regspacing = ipmi_data->offset;
|
|
if (!info->io.regspacing)
|
|
info->io.regspacing = DEFAULT_REGSPACING;
|
|
info->io.regsize = DEFAULT_REGSPACING;
|
|
info->io.regshift = 0;
|
|
|
|
info->slave_addr = ipmi_data->slave_addr;
|
|
|
|
info->irq = ipmi_data->irq;
|
|
if (info->irq)
|
|
info->irq_setup = std_irq_setup;
|
|
|
|
pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
|
|
(info->io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
|
|
info->io.addr_data, info->io.regsize, info->io.regspacing,
|
|
info->irq);
|
|
|
|
if (add_smi(info))
|
|
kfree(info);
|
|
}
|
|
|
|
static void dmi_find_bmc(void)
|
|
{
|
|
const struct dmi_device *dev = NULL;
|
|
struct dmi_ipmi_data data;
|
|
int rv;
|
|
|
|
while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
|
|
memset(&data, 0, sizeof(data));
|
|
rv = decode_dmi((const struct dmi_header *) dev->device_data,
|
|
&data);
|
|
if (!rv)
|
|
try_init_dmi(&data);
|
|
}
|
|
}
|
|
#endif /* CONFIG_DMI */
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
#define PCI_ERMC_CLASSCODE 0x0C0700
|
|
#define PCI_ERMC_CLASSCODE_MASK 0xffffff00
|
|
#define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
|
|
#define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
|
|
#define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
|
|
#define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
|
|
|
|
#define PCI_HP_VENDOR_ID 0x103C
|
|
#define PCI_MMC_DEVICE_ID 0x121A
|
|
#define PCI_MMC_ADDR_CW 0x10
|
|
|
|
static void ipmi_pci_cleanup(struct smi_info *info)
|
|
{
|
|
struct pci_dev *pdev = info->addr_source_data;
|
|
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
static int ipmi_pci_probe_regspacing(struct smi_info *info)
|
|
{
|
|
if (info->si_type == SI_KCS) {
|
|
unsigned char status;
|
|
int regspacing;
|
|
|
|
info->io.regsize = DEFAULT_REGSIZE;
|
|
info->io.regshift = 0;
|
|
info->io_size = 2;
|
|
info->handlers = &kcs_smi_handlers;
|
|
|
|
/* detect 1, 4, 16byte spacing */
|
|
for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
|
|
info->io.regspacing = regspacing;
|
|
if (info->io_setup(info)) {
|
|
dev_err(info->dev,
|
|
"Could not setup I/O space\n");
|
|
return DEFAULT_REGSPACING;
|
|
}
|
|
/* write invalid cmd */
|
|
info->io.outputb(&info->io, 1, 0x10);
|
|
/* read status back */
|
|
status = info->io.inputb(&info->io, 1);
|
|
info->io_cleanup(info);
|
|
if (status)
|
|
return regspacing;
|
|
regspacing *= 4;
|
|
}
|
|
}
|
|
return DEFAULT_REGSPACING;
|
|
}
|
|
|
|
static int ipmi_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
int rv;
|
|
int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
|
|
struct smi_info *info;
|
|
|
|
info = smi_info_alloc();
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->addr_source = SI_PCI;
|
|
dev_info(&pdev->dev, "probing via PCI");
|
|
|
|
switch (class_type) {
|
|
case PCI_ERMC_CLASSCODE_TYPE_SMIC:
|
|
info->si_type = SI_SMIC;
|
|
break;
|
|
|
|
case PCI_ERMC_CLASSCODE_TYPE_KCS:
|
|
info->si_type = SI_KCS;
|
|
break;
|
|
|
|
case PCI_ERMC_CLASSCODE_TYPE_BT:
|
|
info->si_type = SI_BT;
|
|
break;
|
|
|
|
default:
|
|
kfree(info);
|
|
dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rv = pci_enable_device(pdev);
|
|
if (rv) {
|
|
dev_err(&pdev->dev, "couldn't enable PCI device\n");
|
|
kfree(info);
|
|
return rv;
|
|
}
|
|
|
|
info->addr_source_cleanup = ipmi_pci_cleanup;
|
|
info->addr_source_data = pdev;
|
|
|
|
if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
|
|
info->io_setup = port_setup;
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
} else {
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
}
|
|
info->io.addr_data = pci_resource_start(pdev, 0);
|
|
|
|
info->io.regspacing = ipmi_pci_probe_regspacing(info);
|
|
info->io.regsize = DEFAULT_REGSIZE;
|
|
info->io.regshift = 0;
|
|
|
|
info->irq = pdev->irq;
|
|
if (info->irq)
|
|
info->irq_setup = std_irq_setup;
|
|
|
|
info->dev = &pdev->dev;
|
|
pci_set_drvdata(pdev, info);
|
|
|
|
dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
|
|
&pdev->resource[0], info->io.regsize, info->io.regspacing,
|
|
info->irq);
|
|
|
|
rv = add_smi(info);
|
|
if (rv) {
|
|
kfree(info);
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void ipmi_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct smi_info *info = pci_get_drvdata(pdev);
|
|
cleanup_one_si(info);
|
|
}
|
|
|
|
static const struct pci_device_id ipmi_pci_devices[] = {
|
|
{ PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
|
|
{ PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
|
|
{ 0, }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
|
|
|
|
static struct pci_driver ipmi_pci_driver = {
|
|
.name = DEVICE_NAME,
|
|
.id_table = ipmi_pci_devices,
|
|
.probe = ipmi_pci_probe,
|
|
.remove = ipmi_pci_remove,
|
|
};
|
|
#endif /* CONFIG_PCI */
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id of_ipmi_match[] = {
|
|
{ .type = "ipmi", .compatible = "ipmi-kcs",
|
|
.data = (void *)(unsigned long) SI_KCS },
|
|
{ .type = "ipmi", .compatible = "ipmi-smic",
|
|
.data = (void *)(unsigned long) SI_SMIC },
|
|
{ .type = "ipmi", .compatible = "ipmi-bt",
|
|
.data = (void *)(unsigned long) SI_BT },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_ipmi_match);
|
|
|
|
static int of_ipmi_probe(struct platform_device *dev)
|
|
{
|
|
const struct of_device_id *match;
|
|
struct smi_info *info;
|
|
struct resource resource;
|
|
const __be32 *regsize, *regspacing, *regshift;
|
|
struct device_node *np = dev->dev.of_node;
|
|
int ret;
|
|
int proplen;
|
|
|
|
dev_info(&dev->dev, "probing via device tree\n");
|
|
|
|
match = of_match_device(of_ipmi_match, &dev->dev);
|
|
if (!match)
|
|
return -ENODEV;
|
|
|
|
if (!of_device_is_available(np))
|
|
return -EINVAL;
|
|
|
|
ret = of_address_to_resource(np, 0, &resource);
|
|
if (ret) {
|
|
dev_warn(&dev->dev, PFX "invalid address from OF\n");
|
|
return ret;
|
|
}
|
|
|
|
regsize = of_get_property(np, "reg-size", &proplen);
|
|
if (regsize && proplen != 4) {
|
|
dev_warn(&dev->dev, PFX "invalid regsize from OF\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regspacing = of_get_property(np, "reg-spacing", &proplen);
|
|
if (regspacing && proplen != 4) {
|
|
dev_warn(&dev->dev, PFX "invalid regspacing from OF\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regshift = of_get_property(np, "reg-shift", &proplen);
|
|
if (regshift && proplen != 4) {
|
|
dev_warn(&dev->dev, PFX "invalid regshift from OF\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
info = smi_info_alloc();
|
|
|
|
if (!info) {
|
|
dev_err(&dev->dev,
|
|
"could not allocate memory for OF probe\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->si_type = (enum si_type) match->data;
|
|
info->addr_source = SI_DEVICETREE;
|
|
info->irq_setup = std_irq_setup;
|
|
|
|
if (resource.flags & IORESOURCE_IO) {
|
|
info->io_setup = port_setup;
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
} else {
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
}
|
|
|
|
info->io.addr_data = resource.start;
|
|
|
|
info->io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
|
|
info->io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
|
|
info->io.regshift = regshift ? be32_to_cpup(regshift) : 0;
|
|
|
|
info->irq = irq_of_parse_and_map(dev->dev.of_node, 0);
|
|
info->dev = &dev->dev;
|
|
|
|
dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
|
|
info->io.addr_data, info->io.regsize, info->io.regspacing,
|
|
info->irq);
|
|
|
|
dev_set_drvdata(&dev->dev, info);
|
|
|
|
ret = add_smi(info);
|
|
if (ret) {
|
|
kfree(info);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
#define of_ipmi_match NULL
|
|
static int of_ipmi_probe(struct platform_device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static int acpi_ipmi_probe(struct platform_device *dev)
|
|
{
|
|
struct smi_info *info;
|
|
struct resource *res, *res_second;
|
|
acpi_handle handle;
|
|
acpi_status status;
|
|
unsigned long long tmp;
|
|
int rv = -EINVAL;
|
|
|
|
handle = ACPI_HANDLE(&dev->dev);
|
|
if (!handle)
|
|
return -ENODEV;
|
|
|
|
info = smi_info_alloc();
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->addr_source = SI_ACPI;
|
|
dev_info(&dev->dev, PFX "probing via ACPI\n");
|
|
|
|
info->addr_info.acpi_info.acpi_handle = handle;
|
|
|
|
/* _IFT tells us the interface type: KCS, BT, etc */
|
|
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
|
|
if (ACPI_FAILURE(status)) {
|
|
dev_err(&dev->dev, "Could not find ACPI IPMI interface type\n");
|
|
goto err_free;
|
|
}
|
|
|
|
switch (tmp) {
|
|
case 1:
|
|
info->si_type = SI_KCS;
|
|
break;
|
|
case 2:
|
|
info->si_type = SI_SMIC;
|
|
break;
|
|
case 3:
|
|
info->si_type = SI_BT;
|
|
break;
|
|
case 4: /* SSIF, just ignore */
|
|
rv = -ENODEV;
|
|
goto err_free;
|
|
default:
|
|
dev_info(&dev->dev, "unknown IPMI type %lld\n", tmp);
|
|
goto err_free;
|
|
}
|
|
|
|
res = platform_get_resource(dev, IORESOURCE_IO, 0);
|
|
if (res) {
|
|
info->io_setup = port_setup;
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
} else {
|
|
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
if (res) {
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
}
|
|
}
|
|
if (!res) {
|
|
dev_err(&dev->dev, "no I/O or memory address\n");
|
|
goto err_free;
|
|
}
|
|
info->io.addr_data = res->start;
|
|
|
|
info->io.regspacing = DEFAULT_REGSPACING;
|
|
res_second = platform_get_resource(dev,
|
|
(info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
|
|
IORESOURCE_IO : IORESOURCE_MEM,
|
|
1);
|
|
if (res_second) {
|
|
if (res_second->start > info->io.addr_data)
|
|
info->io.regspacing =
|
|
res_second->start - info->io.addr_data;
|
|
}
|
|
info->io.regsize = DEFAULT_REGSPACING;
|
|
info->io.regshift = 0;
|
|
|
|
/* If _GPE exists, use it; otherwise use standard interrupts */
|
|
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
info->irq = tmp;
|
|
info->irq_setup = acpi_gpe_irq_setup;
|
|
} else {
|
|
int irq = platform_get_irq(dev, 0);
|
|
|
|
if (irq > 0) {
|
|
info->irq = irq;
|
|
info->irq_setup = std_irq_setup;
|
|
}
|
|
}
|
|
|
|
info->dev = &dev->dev;
|
|
platform_set_drvdata(dev, info);
|
|
|
|
dev_info(info->dev, "%pR regsize %d spacing %d irq %d\n",
|
|
res, info->io.regsize, info->io.regspacing,
|
|
info->irq);
|
|
|
|
rv = add_smi(info);
|
|
if (rv)
|
|
kfree(info);
|
|
|
|
return rv;
|
|
|
|
err_free:
|
|
kfree(info);
|
|
return rv;
|
|
}
|
|
|
|
static const struct acpi_device_id acpi_ipmi_match[] = {
|
|
{ "IPI0001", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, acpi_ipmi_match);
|
|
#else
|
|
static int acpi_ipmi_probe(struct platform_device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
static int ipmi_probe(struct platform_device *dev)
|
|
{
|
|
if (of_ipmi_probe(dev) == 0)
|
|
return 0;
|
|
|
|
return acpi_ipmi_probe(dev);
|
|
}
|
|
|
|
static int ipmi_remove(struct platform_device *dev)
|
|
{
|
|
struct smi_info *info = dev_get_drvdata(&dev->dev);
|
|
|
|
cleanup_one_si(info);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ipmi_driver = {
|
|
.driver = {
|
|
.name = DEVICE_NAME,
|
|
.of_match_table = of_ipmi_match,
|
|
.acpi_match_table = ACPI_PTR(acpi_ipmi_match),
|
|
},
|
|
.probe = ipmi_probe,
|
|
.remove = ipmi_remove,
|
|
};
|
|
|
|
#ifdef CONFIG_PARISC
|
|
static int ipmi_parisc_probe(struct parisc_device *dev)
|
|
{
|
|
struct smi_info *info;
|
|
int rv;
|
|
|
|
info = smi_info_alloc();
|
|
|
|
if (!info) {
|
|
dev_err(&dev->dev,
|
|
"could not allocate memory for PARISC probe\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->si_type = SI_KCS;
|
|
info->addr_source = SI_DEVICETREE;
|
|
info->io_setup = mem_setup;
|
|
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
info->io.addr_data = dev->hpa.start;
|
|
info->io.regsize = 1;
|
|
info->io.regspacing = 1;
|
|
info->io.regshift = 0;
|
|
info->irq = 0; /* no interrupt */
|
|
info->irq_setup = NULL;
|
|
info->dev = &dev->dev;
|
|
|
|
dev_dbg(&dev->dev, "addr 0x%lx\n", info->io.addr_data);
|
|
|
|
dev_set_drvdata(&dev->dev, info);
|
|
|
|
rv = add_smi(info);
|
|
if (rv) {
|
|
kfree(info);
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ipmi_parisc_remove(struct parisc_device *dev)
|
|
{
|
|
cleanup_one_si(dev_get_drvdata(&dev->dev));
|
|
return 0;
|
|
}
|
|
|
|
static const struct parisc_device_id ipmi_parisc_tbl[] = {
|
|
{ HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 },
|
|
{ 0, }
|
|
};
|
|
|
|
static struct parisc_driver ipmi_parisc_driver = {
|
|
.name = "ipmi",
|
|
.id_table = ipmi_parisc_tbl,
|
|
.probe = ipmi_parisc_probe,
|
|
.remove = ipmi_parisc_remove,
|
|
};
|
|
#endif /* CONFIG_PARISC */
|
|
|
|
static int wait_for_msg_done(struct smi_info *smi_info)
|
|
{
|
|
enum si_sm_result smi_result;
|
|
|
|
smi_result = smi_info->handlers->event(smi_info->si_sm, 0);
|
|
for (;;) {
|
|
if (smi_result == SI_SM_CALL_WITH_DELAY ||
|
|
smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
|
|
schedule_timeout_uninterruptible(1);
|
|
smi_result = smi_info->handlers->event(
|
|
smi_info->si_sm, jiffies_to_usecs(1));
|
|
} else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
|
|
smi_result = smi_info->handlers->event(
|
|
smi_info->si_sm, 0);
|
|
} else
|
|
break;
|
|
}
|
|
if (smi_result == SI_SM_HOSED)
|
|
/*
|
|
* We couldn't get the state machine to run, so whatever's at
|
|
* the port is probably not an IPMI SMI interface.
|
|
*/
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int try_get_dev_id(struct smi_info *smi_info)
|
|
{
|
|
unsigned char msg[2];
|
|
unsigned char *resp;
|
|
unsigned long resp_len;
|
|
int rv = 0;
|
|
|
|
resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
|
|
if (!resp)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Do a Get Device ID command, since it comes back with some
|
|
* useful info.
|
|
*/
|
|
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
|
|
msg[1] = IPMI_GET_DEVICE_ID_CMD;
|
|
smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
|
|
|
|
rv = wait_for_msg_done(smi_info);
|
|
if (rv)
|
|
goto out;
|
|
|
|
resp_len = smi_info->handlers->get_result(smi_info->si_sm,
|
|
resp, IPMI_MAX_MSG_LENGTH);
|
|
|
|
/* Check and record info from the get device id, in case we need it. */
|
|
rv = ipmi_demangle_device_id(resp, resp_len, &smi_info->device_id);
|
|
|
|
out:
|
|
kfree(resp);
|
|
return rv;
|
|
}
|
|
|
|
static int get_global_enables(struct smi_info *smi_info, u8 *enables)
|
|
{
|
|
unsigned char msg[3];
|
|
unsigned char *resp;
|
|
unsigned long resp_len;
|
|
int rv;
|
|
|
|
resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
|
|
if (!resp)
|
|
return -ENOMEM;
|
|
|
|
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
|
|
msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
|
|
smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
|
|
|
|
rv = wait_for_msg_done(smi_info);
|
|
if (rv) {
|
|
dev_warn(smi_info->dev,
|
|
"Error getting response from get global enables command: %d\n",
|
|
rv);
|
|
goto out;
|
|
}
|
|
|
|
resp_len = smi_info->handlers->get_result(smi_info->si_sm,
|
|
resp, IPMI_MAX_MSG_LENGTH);
|
|
|
|
if (resp_len < 4 ||
|
|
resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
|
|
resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
|
|
resp[2] != 0) {
|
|
dev_warn(smi_info->dev,
|
|
"Invalid return from get global enables command: %ld %x %x %x\n",
|
|
resp_len, resp[0], resp[1], resp[2]);
|
|
rv = -EINVAL;
|
|
goto out;
|
|
} else {
|
|
*enables = resp[3];
|
|
}
|
|
|
|
out:
|
|
kfree(resp);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if it gets an error from the command.
|
|
*/
|
|
static int set_global_enables(struct smi_info *smi_info, u8 enables)
|
|
{
|
|
unsigned char msg[3];
|
|
unsigned char *resp;
|
|
unsigned long resp_len;
|
|
int rv;
|
|
|
|
resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
|
|
if (!resp)
|
|
return -ENOMEM;
|
|
|
|
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
|
|
msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
|
|
msg[2] = enables;
|
|
smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
|
|
|
|
rv = wait_for_msg_done(smi_info);
|
|
if (rv) {
|
|
dev_warn(smi_info->dev,
|
|
"Error getting response from set global enables command: %d\n",
|
|
rv);
|
|
goto out;
|
|
}
|
|
|
|
resp_len = smi_info->handlers->get_result(smi_info->si_sm,
|
|
resp, IPMI_MAX_MSG_LENGTH);
|
|
|
|
if (resp_len < 3 ||
|
|
resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
|
|
resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
|
|
dev_warn(smi_info->dev,
|
|
"Invalid return from set global enables command: %ld %x %x\n",
|
|
resp_len, resp[0], resp[1]);
|
|
rv = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (resp[2] != 0)
|
|
rv = 1;
|
|
|
|
out:
|
|
kfree(resp);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Some BMCs do not support clearing the receive irq bit in the global
|
|
* enables (even if they don't support interrupts on the BMC). Check
|
|
* for this and handle it properly.
|
|
*/
|
|
static void check_clr_rcv_irq(struct smi_info *smi_info)
|
|
{
|
|
u8 enables = 0;
|
|
int rv;
|
|
|
|
rv = get_global_enables(smi_info, &enables);
|
|
if (!rv) {
|
|
if ((enables & IPMI_BMC_RCV_MSG_INTR) == 0)
|
|
/* Already clear, should work ok. */
|
|
return;
|
|
|
|
enables &= ~IPMI_BMC_RCV_MSG_INTR;
|
|
rv = set_global_enables(smi_info, enables);
|
|
}
|
|
|
|
if (rv < 0) {
|
|
dev_err(smi_info->dev,
|
|
"Cannot check clearing the rcv irq: %d\n", rv);
|
|
return;
|
|
}
|
|
|
|
if (rv) {
|
|
/*
|
|
* An error when setting the event buffer bit means
|
|
* clearing the bit is not supported.
|
|
*/
|
|
dev_warn(smi_info->dev,
|
|
"The BMC does not support clearing the recv irq bit, compensating, but the BMC needs to be fixed.\n");
|
|
smi_info->cannot_disable_irq = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Some BMCs do not support setting the interrupt bits in the global
|
|
* enables even if they support interrupts. Clearly bad, but we can
|
|
* compensate.
|
|
*/
|
|
static void check_set_rcv_irq(struct smi_info *smi_info)
|
|
{
|
|
u8 enables = 0;
|
|
int rv;
|
|
|
|
if (!smi_info->irq)
|
|
return;
|
|
|
|
rv = get_global_enables(smi_info, &enables);
|
|
if (!rv) {
|
|
enables |= IPMI_BMC_RCV_MSG_INTR;
|
|
rv = set_global_enables(smi_info, enables);
|
|
}
|
|
|
|
if (rv < 0) {
|
|
dev_err(smi_info->dev,
|
|
"Cannot check setting the rcv irq: %d\n", rv);
|
|
return;
|
|
}
|
|
|
|
if (rv) {
|
|
/*
|
|
* An error when setting the event buffer bit means
|
|
* setting the bit is not supported.
|
|
*/
|
|
dev_warn(smi_info->dev,
|
|
"The BMC does not support setting the recv irq bit, compensating, but the BMC needs to be fixed.\n");
|
|
smi_info->cannot_disable_irq = true;
|
|
smi_info->irq_enable_broken = true;
|
|
}
|
|
}
|
|
|
|
static int try_enable_event_buffer(struct smi_info *smi_info)
|
|
{
|
|
unsigned char msg[3];
|
|
unsigned char *resp;
|
|
unsigned long resp_len;
|
|
int rv = 0;
|
|
|
|
resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
|
|
if (!resp)
|
|
return -ENOMEM;
|
|
|
|
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
|
|
msg[1] = IPMI_GET_BMC_GLOBAL_ENABLES_CMD;
|
|
smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
|
|
|
|
rv = wait_for_msg_done(smi_info);
|
|
if (rv) {
|
|
printk(KERN_WARNING PFX "Error getting response from get"
|
|
" global enables command, the event buffer is not"
|
|
" enabled.\n");
|
|
goto out;
|
|
}
|
|
|
|
resp_len = smi_info->handlers->get_result(smi_info->si_sm,
|
|
resp, IPMI_MAX_MSG_LENGTH);
|
|
|
|
if (resp_len < 4 ||
|
|
resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
|
|
resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD ||
|
|
resp[2] != 0) {
|
|
printk(KERN_WARNING PFX "Invalid return from get global"
|
|
" enables command, cannot enable the event buffer.\n");
|
|
rv = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (resp[3] & IPMI_BMC_EVT_MSG_BUFF) {
|
|
/* buffer is already enabled, nothing to do. */
|
|
smi_info->supports_event_msg_buff = true;
|
|
goto out;
|
|
}
|
|
|
|
msg[0] = IPMI_NETFN_APP_REQUEST << 2;
|
|
msg[1] = IPMI_SET_BMC_GLOBAL_ENABLES_CMD;
|
|
msg[2] = resp[3] | IPMI_BMC_EVT_MSG_BUFF;
|
|
smi_info->handlers->start_transaction(smi_info->si_sm, msg, 3);
|
|
|
|
rv = wait_for_msg_done(smi_info);
|
|
if (rv) {
|
|
printk(KERN_WARNING PFX "Error getting response from set"
|
|
" global, enables command, the event buffer is not"
|
|
" enabled.\n");
|
|
goto out;
|
|
}
|
|
|
|
resp_len = smi_info->handlers->get_result(smi_info->si_sm,
|
|
resp, IPMI_MAX_MSG_LENGTH);
|
|
|
|
if (resp_len < 3 ||
|
|
resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
|
|
resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
|
|
printk(KERN_WARNING PFX "Invalid return from get global,"
|
|
"enables command, not enable the event buffer.\n");
|
|
rv = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (resp[2] != 0)
|
|
/*
|
|
* An error when setting the event buffer bit means
|
|
* that the event buffer is not supported.
|
|
*/
|
|
rv = -ENOENT;
|
|
else
|
|
smi_info->supports_event_msg_buff = true;
|
|
|
|
out:
|
|
kfree(resp);
|
|
return rv;
|
|
}
|
|
|
|
static int smi_type_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct smi_info *smi = m->private;
|
|
|
|
seq_printf(m, "%s\n", si_to_str[smi->si_type]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smi_type_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, smi_type_proc_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations smi_type_proc_ops = {
|
|
.open = smi_type_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int smi_si_stats_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct smi_info *smi = m->private;
|
|
|
|
seq_printf(m, "interrupts_enabled: %d\n",
|
|
smi->irq && !smi->interrupt_disabled);
|
|
seq_printf(m, "short_timeouts: %u\n",
|
|
smi_get_stat(smi, short_timeouts));
|
|
seq_printf(m, "long_timeouts: %u\n",
|
|
smi_get_stat(smi, long_timeouts));
|
|
seq_printf(m, "idles: %u\n",
|
|
smi_get_stat(smi, idles));
|
|
seq_printf(m, "interrupts: %u\n",
|
|
smi_get_stat(smi, interrupts));
|
|
seq_printf(m, "attentions: %u\n",
|
|
smi_get_stat(smi, attentions));
|
|
seq_printf(m, "flag_fetches: %u\n",
|
|
smi_get_stat(smi, flag_fetches));
|
|
seq_printf(m, "hosed_count: %u\n",
|
|
smi_get_stat(smi, hosed_count));
|
|
seq_printf(m, "complete_transactions: %u\n",
|
|
smi_get_stat(smi, complete_transactions));
|
|
seq_printf(m, "events: %u\n",
|
|
smi_get_stat(smi, events));
|
|
seq_printf(m, "watchdog_pretimeouts: %u\n",
|
|
smi_get_stat(smi, watchdog_pretimeouts));
|
|
seq_printf(m, "incoming_messages: %u\n",
|
|
smi_get_stat(smi, incoming_messages));
|
|
return 0;
|
|
}
|
|
|
|
static int smi_si_stats_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, smi_si_stats_proc_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations smi_si_stats_proc_ops = {
|
|
.open = smi_si_stats_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int smi_params_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct smi_info *smi = m->private;
|
|
|
|
seq_printf(m,
|
|
"%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
|
|
si_to_str[smi->si_type],
|
|
addr_space_to_str[smi->io.addr_type],
|
|
smi->io.addr_data,
|
|
smi->io.regspacing,
|
|
smi->io.regsize,
|
|
smi->io.regshift,
|
|
smi->irq,
|
|
smi->slave_addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smi_params_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, smi_params_proc_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations smi_params_proc_ops = {
|
|
.open = smi_params_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
/*
|
|
* oem_data_avail_to_receive_msg_avail
|
|
* @info - smi_info structure with msg_flags set
|
|
*
|
|
* Converts flags from OEM_DATA_AVAIL to RECEIVE_MSG_AVAIL
|
|
* Returns 1 indicating need to re-run handle_flags().
|
|
*/
|
|
static int oem_data_avail_to_receive_msg_avail(struct smi_info *smi_info)
|
|
{
|
|
smi_info->msg_flags = ((smi_info->msg_flags & ~OEM_DATA_AVAIL) |
|
|
RECEIVE_MSG_AVAIL);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* setup_dell_poweredge_oem_data_handler
|
|
* @info - smi_info.device_id must be populated
|
|
*
|
|
* Systems that match, but have firmware version < 1.40 may assert
|
|
* OEM0_DATA_AVAIL on their own, without being told via Set Flags that
|
|
* it's safe to do so. Such systems will de-assert OEM1_DATA_AVAIL
|
|
* upon receipt of IPMI_GET_MSG_CMD, so we should treat these flags
|
|
* as RECEIVE_MSG_AVAIL instead.
|
|
*
|
|
* As Dell has no plans to release IPMI 1.5 firmware that *ever*
|
|
* assert the OEM[012] bits, and if it did, the driver would have to
|
|
* change to handle that properly, we don't actually check for the
|
|
* firmware version.
|
|
* Device ID = 0x20 BMC on PowerEdge 8G servers
|
|
* Device Revision = 0x80
|
|
* Firmware Revision1 = 0x01 BMC version 1.40
|
|
* Firmware Revision2 = 0x40 BCD encoded
|
|
* IPMI Version = 0x51 IPMI 1.5
|
|
* Manufacturer ID = A2 02 00 Dell IANA
|
|
*
|
|
* Additionally, PowerEdge systems with IPMI < 1.5 may also assert
|
|
* OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
|
|
*
|
|
*/
|
|
#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
|
|
#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
|
|
#define DELL_POWEREDGE_8G_BMC_IPMI_VERSION 0x51
|
|
#define DELL_IANA_MFR_ID 0x0002a2
|
|
static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
|
|
{
|
|
struct ipmi_device_id *id = &smi_info->device_id;
|
|
if (id->manufacturer_id == DELL_IANA_MFR_ID) {
|
|
if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
|
|
id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
|
|
id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
|
|
smi_info->oem_data_avail_handler =
|
|
oem_data_avail_to_receive_msg_avail;
|
|
} else if (ipmi_version_major(id) < 1 ||
|
|
(ipmi_version_major(id) == 1 &&
|
|
ipmi_version_minor(id) < 5)) {
|
|
smi_info->oem_data_avail_handler =
|
|
oem_data_avail_to_receive_msg_avail;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
|
|
static void return_hosed_msg_badsize(struct smi_info *smi_info)
|
|
{
|
|
struct ipmi_smi_msg *msg = smi_info->curr_msg;
|
|
|
|
/* Make it a response */
|
|
msg->rsp[0] = msg->data[0] | 4;
|
|
msg->rsp[1] = msg->data[1];
|
|
msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
|
|
msg->rsp_size = 3;
|
|
smi_info->curr_msg = NULL;
|
|
deliver_recv_msg(smi_info, msg);
|
|
}
|
|
|
|
/*
|
|
* dell_poweredge_bt_xaction_handler
|
|
* @info - smi_info.device_id must be populated
|
|
*
|
|
* Dell PowerEdge servers with the BT interface (x6xx and 1750) will
|
|
* not respond to a Get SDR command if the length of the data
|
|
* requested is exactly 0x3A, which leads to command timeouts and no
|
|
* data returned. This intercepts such commands, and causes userspace
|
|
* callers to try again with a different-sized buffer, which succeeds.
|
|
*/
|
|
|
|
#define STORAGE_NETFN 0x0A
|
|
#define STORAGE_CMD_GET_SDR 0x23
|
|
static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
|
|
unsigned long unused,
|
|
void *in)
|
|
{
|
|
struct smi_info *smi_info = in;
|
|
unsigned char *data = smi_info->curr_msg->data;
|
|
unsigned int size = smi_info->curr_msg->data_size;
|
|
if (size >= 8 &&
|
|
(data[0]>>2) == STORAGE_NETFN &&
|
|
data[1] == STORAGE_CMD_GET_SDR &&
|
|
data[7] == 0x3A) {
|
|
return_hosed_msg_badsize(smi_info);
|
|
return NOTIFY_STOP;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block dell_poweredge_bt_xaction_notifier = {
|
|
.notifier_call = dell_poweredge_bt_xaction_handler,
|
|
};
|
|
|
|
/*
|
|
* setup_dell_poweredge_bt_xaction_handler
|
|
* @info - smi_info.device_id must be filled in already
|
|
*
|
|
* Fills in smi_info.device_id.start_transaction_pre_hook
|
|
* when we know what function to use there.
|
|
*/
|
|
static void
|
|
setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
|
|
{
|
|
struct ipmi_device_id *id = &smi_info->device_id;
|
|
if (id->manufacturer_id == DELL_IANA_MFR_ID &&
|
|
smi_info->si_type == SI_BT)
|
|
register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
|
|
}
|
|
|
|
/*
|
|
* setup_oem_data_handler
|
|
* @info - smi_info.device_id must be filled in already
|
|
*
|
|
* Fills in smi_info.device_id.oem_data_available_handler
|
|
* when we know what function to use there.
|
|
*/
|
|
|
|
static void setup_oem_data_handler(struct smi_info *smi_info)
|
|
{
|
|
setup_dell_poweredge_oem_data_handler(smi_info);
|
|
}
|
|
|
|
static void setup_xaction_handlers(struct smi_info *smi_info)
|
|
{
|
|
setup_dell_poweredge_bt_xaction_handler(smi_info);
|
|
}
|
|
|
|
static void check_for_broken_irqs(struct smi_info *smi_info)
|
|
{
|
|
check_clr_rcv_irq(smi_info);
|
|
check_set_rcv_irq(smi_info);
|
|
}
|
|
|
|
static inline void wait_for_timer_and_thread(struct smi_info *smi_info)
|
|
{
|
|
if (smi_info->thread != NULL)
|
|
kthread_stop(smi_info->thread);
|
|
if (smi_info->timer_running)
|
|
del_timer_sync(&smi_info->si_timer);
|
|
}
|
|
|
|
static const struct ipmi_default_vals
|
|
{
|
|
const int type;
|
|
const int port;
|
|
} ipmi_defaults[] =
|
|
{
|
|
{ .type = SI_KCS, .port = 0xca2 },
|
|
{ .type = SI_SMIC, .port = 0xca9 },
|
|
{ .type = SI_BT, .port = 0xe4 },
|
|
{ .port = 0 }
|
|
};
|
|
|
|
static void default_find_bmc(void)
|
|
{
|
|
struct smi_info *info;
|
|
int i;
|
|
|
|
for (i = 0; ; i++) {
|
|
if (!ipmi_defaults[i].port)
|
|
break;
|
|
#ifdef CONFIG_PPC
|
|
if (check_legacy_ioport(ipmi_defaults[i].port))
|
|
continue;
|
|
#endif
|
|
info = smi_info_alloc();
|
|
if (!info)
|
|
return;
|
|
|
|
info->addr_source = SI_DEFAULT;
|
|
|
|
info->si_type = ipmi_defaults[i].type;
|
|
info->io_setup = port_setup;
|
|
info->io.addr_data = ipmi_defaults[i].port;
|
|
info->io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
|
|
info->io.addr = NULL;
|
|
info->io.regspacing = DEFAULT_REGSPACING;
|
|
info->io.regsize = DEFAULT_REGSPACING;
|
|
info->io.regshift = 0;
|
|
|
|
if (add_smi(info) == 0) {
|
|
if ((try_smi_init(info)) == 0) {
|
|
/* Found one... */
|
|
printk(KERN_INFO PFX "Found default %s"
|
|
" state machine at %s address 0x%lx\n",
|
|
si_to_str[info->si_type],
|
|
addr_space_to_str[info->io.addr_type],
|
|
info->io.addr_data);
|
|
} else
|
|
cleanup_one_si(info);
|
|
} else {
|
|
kfree(info);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int is_new_interface(struct smi_info *info)
|
|
{
|
|
struct smi_info *e;
|
|
|
|
list_for_each_entry(e, &smi_infos, link) {
|
|
if (e->io.addr_type != info->io.addr_type)
|
|
continue;
|
|
if (e->io.addr_data == info->io.addr_data)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int add_smi(struct smi_info *new_smi)
|
|
{
|
|
int rv = 0;
|
|
|
|
printk(KERN_INFO PFX "Adding %s-specified %s state machine",
|
|
ipmi_addr_src_to_str(new_smi->addr_source),
|
|
si_to_str[new_smi->si_type]);
|
|
mutex_lock(&smi_infos_lock);
|
|
if (!is_new_interface(new_smi)) {
|
|
printk(KERN_CONT " duplicate interface\n");
|
|
rv = -EBUSY;
|
|
goto out_err;
|
|
}
|
|
|
|
printk(KERN_CONT "\n");
|
|
|
|
/* So we know not to free it unless we have allocated one. */
|
|
new_smi->intf = NULL;
|
|
new_smi->si_sm = NULL;
|
|
new_smi->handlers = NULL;
|
|
|
|
list_add_tail(&new_smi->link, &smi_infos);
|
|
|
|
out_err:
|
|
mutex_unlock(&smi_infos_lock);
|
|
return rv;
|
|
}
|
|
|
|
static int try_smi_init(struct smi_info *new_smi)
|
|
{
|
|
int rv = 0;
|
|
int i;
|
|
|
|
printk(KERN_INFO PFX "Trying %s-specified %s state"
|
|
" machine at %s address 0x%lx, slave address 0x%x,"
|
|
" irq %d\n",
|
|
ipmi_addr_src_to_str(new_smi->addr_source),
|
|
si_to_str[new_smi->si_type],
|
|
addr_space_to_str[new_smi->io.addr_type],
|
|
new_smi->io.addr_data,
|
|
new_smi->slave_addr, new_smi->irq);
|
|
|
|
switch (new_smi->si_type) {
|
|
case SI_KCS:
|
|
new_smi->handlers = &kcs_smi_handlers;
|
|
break;
|
|
|
|
case SI_SMIC:
|
|
new_smi->handlers = &smic_smi_handlers;
|
|
break;
|
|
|
|
case SI_BT:
|
|
new_smi->handlers = &bt_smi_handlers;
|
|
break;
|
|
|
|
default:
|
|
/* No support for anything else yet. */
|
|
rv = -EIO;
|
|
goto out_err;
|
|
}
|
|
|
|
/* Allocate the state machine's data and initialize it. */
|
|
new_smi->si_sm = kmalloc(new_smi->handlers->size(), GFP_KERNEL);
|
|
if (!new_smi->si_sm) {
|
|
printk(KERN_ERR PFX
|
|
"Could not allocate state machine memory\n");
|
|
rv = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
new_smi->io_size = new_smi->handlers->init_data(new_smi->si_sm,
|
|
&new_smi->io);
|
|
|
|
/* Now that we know the I/O size, we can set up the I/O. */
|
|
rv = new_smi->io_setup(new_smi);
|
|
if (rv) {
|
|
printk(KERN_ERR PFX "Could not set up I/O space\n");
|
|
goto out_err;
|
|
}
|
|
|
|
/* Do low-level detection first. */
|
|
if (new_smi->handlers->detect(new_smi->si_sm)) {
|
|
if (new_smi->addr_source)
|
|
printk(KERN_INFO PFX "Interface detection failed\n");
|
|
rv = -ENODEV;
|
|
goto out_err;
|
|
}
|
|
|
|
/*
|
|
* Attempt a get device id command. If it fails, we probably
|
|
* don't have a BMC here.
|
|
*/
|
|
rv = try_get_dev_id(new_smi);
|
|
if (rv) {
|
|
if (new_smi->addr_source)
|
|
printk(KERN_INFO PFX "There appears to be no BMC"
|
|
" at this location\n");
|
|
goto out_err;
|
|
}
|
|
|
|
setup_oem_data_handler(new_smi);
|
|
setup_xaction_handlers(new_smi);
|
|
check_for_broken_irqs(new_smi);
|
|
|
|
new_smi->waiting_msg = NULL;
|
|
new_smi->curr_msg = NULL;
|
|
atomic_set(&new_smi->req_events, 0);
|
|
new_smi->run_to_completion = false;
|
|
for (i = 0; i < SI_NUM_STATS; i++)
|
|
atomic_set(&new_smi->stats[i], 0);
|
|
|
|
new_smi->interrupt_disabled = true;
|
|
atomic_set(&new_smi->need_watch, 0);
|
|
new_smi->intf_num = smi_num;
|
|
smi_num++;
|
|
|
|
rv = try_enable_event_buffer(new_smi);
|
|
if (rv == 0)
|
|
new_smi->has_event_buffer = true;
|
|
|
|
/*
|
|
* Start clearing the flags before we enable interrupts or the
|
|
* timer to avoid racing with the timer.
|
|
*/
|
|
start_clear_flags(new_smi, false);
|
|
|
|
/*
|
|
* IRQ is defined to be set when non-zero. req_events will
|
|
* cause a global flags check that will enable interrupts.
|
|
*/
|
|
if (new_smi->irq) {
|
|
new_smi->interrupt_disabled = false;
|
|
atomic_set(&new_smi->req_events, 1);
|
|
}
|
|
|
|
if (!new_smi->dev) {
|
|
/*
|
|
* If we don't already have a device from something
|
|
* else (like PCI), then register a new one.
|
|
*/
|
|
new_smi->pdev = platform_device_alloc("ipmi_si",
|
|
new_smi->intf_num);
|
|
if (!new_smi->pdev) {
|
|
printk(KERN_ERR PFX
|
|
"Unable to allocate platform device\n");
|
|
goto out_err;
|
|
}
|
|
new_smi->dev = &new_smi->pdev->dev;
|
|
new_smi->dev->driver = &ipmi_driver.driver;
|
|
|
|
rv = platform_device_add(new_smi->pdev);
|
|
if (rv) {
|
|
printk(KERN_ERR PFX
|
|
"Unable to register system interface device:"
|
|
" %d\n",
|
|
rv);
|
|
goto out_err;
|
|
}
|
|
new_smi->dev_registered = true;
|
|
}
|
|
|
|
rv = ipmi_register_smi(&handlers,
|
|
new_smi,
|
|
&new_smi->device_id,
|
|
new_smi->dev,
|
|
new_smi->slave_addr);
|
|
if (rv) {
|
|
dev_err(new_smi->dev, "Unable to register device: error %d\n",
|
|
rv);
|
|
goto out_err_stop_timer;
|
|
}
|
|
|
|
rv = ipmi_smi_add_proc_entry(new_smi->intf, "type",
|
|
&smi_type_proc_ops,
|
|
new_smi);
|
|
if (rv) {
|
|
dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
|
|
goto out_err_stop_timer;
|
|
}
|
|
|
|
rv = ipmi_smi_add_proc_entry(new_smi->intf, "si_stats",
|
|
&smi_si_stats_proc_ops,
|
|
new_smi);
|
|
if (rv) {
|
|
dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
|
|
goto out_err_stop_timer;
|
|
}
|
|
|
|
rv = ipmi_smi_add_proc_entry(new_smi->intf, "params",
|
|
&smi_params_proc_ops,
|
|
new_smi);
|
|
if (rv) {
|
|
dev_err(new_smi->dev, "Unable to create proc entry: %d\n", rv);
|
|
goto out_err_stop_timer;
|
|
}
|
|
|
|
dev_info(new_smi->dev, "IPMI %s interface initialized\n",
|
|
si_to_str[new_smi->si_type]);
|
|
|
|
return 0;
|
|
|
|
out_err_stop_timer:
|
|
wait_for_timer_and_thread(new_smi);
|
|
|
|
out_err:
|
|
new_smi->interrupt_disabled = true;
|
|
|
|
if (new_smi->intf) {
|
|
ipmi_smi_t intf = new_smi->intf;
|
|
new_smi->intf = NULL;
|
|
ipmi_unregister_smi(intf);
|
|
}
|
|
|
|
if (new_smi->irq_cleanup) {
|
|
new_smi->irq_cleanup(new_smi);
|
|
new_smi->irq_cleanup = NULL;
|
|
}
|
|
|
|
/*
|
|
* Wait until we know that we are out of any interrupt
|
|
* handlers might have been running before we freed the
|
|
* interrupt.
|
|
*/
|
|
synchronize_sched();
|
|
|
|
if (new_smi->si_sm) {
|
|
if (new_smi->handlers)
|
|
new_smi->handlers->cleanup(new_smi->si_sm);
|
|
kfree(new_smi->si_sm);
|
|
new_smi->si_sm = NULL;
|
|
}
|
|
if (new_smi->addr_source_cleanup) {
|
|
new_smi->addr_source_cleanup(new_smi);
|
|
new_smi->addr_source_cleanup = NULL;
|
|
}
|
|
if (new_smi->io_cleanup) {
|
|
new_smi->io_cleanup(new_smi);
|
|
new_smi->io_cleanup = NULL;
|
|
}
|
|
|
|
if (new_smi->dev_registered) {
|
|
platform_device_unregister(new_smi->pdev);
|
|
new_smi->dev_registered = false;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static int init_ipmi_si(void)
|
|
{
|
|
int i;
|
|
char *str;
|
|
int rv;
|
|
struct smi_info *e;
|
|
enum ipmi_addr_src type = SI_INVALID;
|
|
|
|
if (initialized)
|
|
return 0;
|
|
initialized = 1;
|
|
|
|
if (si_tryplatform) {
|
|
rv = platform_driver_register(&ipmi_driver);
|
|
if (rv) {
|
|
printk(KERN_ERR PFX "Unable to register "
|
|
"driver: %d\n", rv);
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
/* Parse out the si_type string into its components. */
|
|
str = si_type_str;
|
|
if (*str != '\0') {
|
|
for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
|
|
si_type[i] = str;
|
|
str = strchr(str, ',');
|
|
if (str) {
|
|
*str = '\0';
|
|
str++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
printk(KERN_INFO "IPMI System Interface driver.\n");
|
|
|
|
/* If the user gave us a device, they presumably want us to use it */
|
|
if (!hardcode_find_bmc())
|
|
return 0;
|
|
|
|
#ifdef CONFIG_PCI
|
|
if (si_trypci) {
|
|
rv = pci_register_driver(&ipmi_pci_driver);
|
|
if (rv)
|
|
printk(KERN_ERR PFX "Unable to register "
|
|
"PCI driver: %d\n", rv);
|
|
else
|
|
pci_registered = true;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_DMI
|
|
if (si_trydmi)
|
|
dmi_find_bmc();
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
if (si_tryacpi)
|
|
spmi_find_bmc();
|
|
#endif
|
|
|
|
#ifdef CONFIG_PARISC
|
|
register_parisc_driver(&ipmi_parisc_driver);
|
|
parisc_registered = true;
|
|
/* poking PC IO addresses will crash machine, don't do it */
|
|
si_trydefaults = 0;
|
|
#endif
|
|
|
|
/* We prefer devices with interrupts, but in the case of a machine
|
|
with multiple BMCs we assume that there will be several instances
|
|
of a given type so if we succeed in registering a type then also
|
|
try to register everything else of the same type */
|
|
|
|
mutex_lock(&smi_infos_lock);
|
|
list_for_each_entry(e, &smi_infos, link) {
|
|
/* Try to register a device if it has an IRQ and we either
|
|
haven't successfully registered a device yet or this
|
|
device has the same type as one we successfully registered */
|
|
if (e->irq && (!type || e->addr_source == type)) {
|
|
if (!try_smi_init(e)) {
|
|
type = e->addr_source;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* type will only have been set if we successfully registered an si */
|
|
if (type) {
|
|
mutex_unlock(&smi_infos_lock);
|
|
return 0;
|
|
}
|
|
|
|
/* Fall back to the preferred device */
|
|
|
|
list_for_each_entry(e, &smi_infos, link) {
|
|
if (!e->irq && (!type || e->addr_source == type)) {
|
|
if (!try_smi_init(e)) {
|
|
type = e->addr_source;
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&smi_infos_lock);
|
|
|
|
if (type)
|
|
return 0;
|
|
|
|
if (si_trydefaults) {
|
|
mutex_lock(&smi_infos_lock);
|
|
if (list_empty(&smi_infos)) {
|
|
/* No BMC was found, try defaults. */
|
|
mutex_unlock(&smi_infos_lock);
|
|
default_find_bmc();
|
|
} else
|
|
mutex_unlock(&smi_infos_lock);
|
|
}
|
|
|
|
mutex_lock(&smi_infos_lock);
|
|
if (unload_when_empty && list_empty(&smi_infos)) {
|
|
mutex_unlock(&smi_infos_lock);
|
|
cleanup_ipmi_si();
|
|
printk(KERN_WARNING PFX
|
|
"Unable to find any System Interface(s)\n");
|
|
return -ENODEV;
|
|
} else {
|
|
mutex_unlock(&smi_infos_lock);
|
|
return 0;
|
|
}
|
|
}
|
|
module_init(init_ipmi_si);
|
|
|
|
static void cleanup_one_si(struct smi_info *to_clean)
|
|
{
|
|
int rv = 0;
|
|
|
|
if (!to_clean)
|
|
return;
|
|
|
|
if (to_clean->intf) {
|
|
ipmi_smi_t intf = to_clean->intf;
|
|
|
|
to_clean->intf = NULL;
|
|
rv = ipmi_unregister_smi(intf);
|
|
if (rv) {
|
|
pr_err(PFX "Unable to unregister device: errno=%d\n",
|
|
rv);
|
|
}
|
|
}
|
|
|
|
if (to_clean->dev)
|
|
dev_set_drvdata(to_clean->dev, NULL);
|
|
|
|
list_del(&to_clean->link);
|
|
|
|
/*
|
|
* Make sure that interrupts, the timer and the thread are
|
|
* stopped and will not run again.
|
|
*/
|
|
if (to_clean->irq_cleanup)
|
|
to_clean->irq_cleanup(to_clean);
|
|
wait_for_timer_and_thread(to_clean);
|
|
|
|
/*
|
|
* Timeouts are stopped, now make sure the interrupts are off
|
|
* in the BMC. Note that timers and CPU interrupts are off,
|
|
* so no need for locks.
|
|
*/
|
|
while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
|
|
poll(to_clean);
|
|
schedule_timeout_uninterruptible(1);
|
|
}
|
|
disable_si_irq(to_clean, false);
|
|
while (to_clean->curr_msg || (to_clean->si_state != SI_NORMAL)) {
|
|
poll(to_clean);
|
|
schedule_timeout_uninterruptible(1);
|
|
}
|
|
|
|
if (to_clean->handlers)
|
|
to_clean->handlers->cleanup(to_clean->si_sm);
|
|
|
|
kfree(to_clean->si_sm);
|
|
|
|
if (to_clean->addr_source_cleanup)
|
|
to_clean->addr_source_cleanup(to_clean);
|
|
if (to_clean->io_cleanup)
|
|
to_clean->io_cleanup(to_clean);
|
|
|
|
if (to_clean->dev_registered)
|
|
platform_device_unregister(to_clean->pdev);
|
|
|
|
kfree(to_clean);
|
|
}
|
|
|
|
static void cleanup_ipmi_si(void)
|
|
{
|
|
struct smi_info *e, *tmp_e;
|
|
|
|
if (!initialized)
|
|
return;
|
|
|
|
#ifdef CONFIG_PCI
|
|
if (pci_registered)
|
|
pci_unregister_driver(&ipmi_pci_driver);
|
|
#endif
|
|
#ifdef CONFIG_PARISC
|
|
if (parisc_registered)
|
|
unregister_parisc_driver(&ipmi_parisc_driver);
|
|
#endif
|
|
|
|
platform_driver_unregister(&ipmi_driver);
|
|
|
|
mutex_lock(&smi_infos_lock);
|
|
list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
|
|
cleanup_one_si(e);
|
|
mutex_unlock(&smi_infos_lock);
|
|
}
|
|
module_exit(cleanup_ipmi_si);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
|
|
MODULE_DESCRIPTION("Interface to the IPMI driver for the KCS, SMIC, and BT"
|
|
" system interfaces.");
|