550 lines
14 KiB
C
550 lines
14 KiB
C
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/*
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* ipmi_poweroff.c
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*
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* MontaVista IPMI Poweroff extension to sys_reboot
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*
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* Author: MontaVista Software, Inc.
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* Steven Dake <sdake@mvista.com>
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* Corey Minyard <cminyard@mvista.com>
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* source@mvista.com
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*
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* Copyright 2002,2004 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <asm/semaphore.h>
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#include <linux/kdev_t.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/ipmi.h>
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#include <linux/ipmi_smi.h>
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#define PFX "IPMI poweroff: "
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#define IPMI_POWEROFF_VERSION "v33"
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/* Where to we insert our poweroff function? */
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extern void (*pm_power_off)(void);
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/* Stuff from the get device id command. */
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static unsigned int mfg_id;
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static unsigned int prod_id;
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static unsigned char capabilities;
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/* We use our own messages for this operation, we don't let the system
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allocate them, since we may be in a panic situation. The whole
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thing is single-threaded, anyway, so multiple messages are not
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required. */
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static void dummy_smi_free(struct ipmi_smi_msg *msg)
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{
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}
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static void dummy_recv_free(struct ipmi_recv_msg *msg)
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{
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}
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static struct ipmi_smi_msg halt_smi_msg =
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{
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.done = dummy_smi_free
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};
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static struct ipmi_recv_msg halt_recv_msg =
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{
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.done = dummy_recv_free
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};
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/*
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* Code to send a message and wait for the reponse.
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*/
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static void receive_handler(struct ipmi_recv_msg *recv_msg, void *handler_data)
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{
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struct semaphore *sem = recv_msg->user_msg_data;
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if (sem)
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up(sem);
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}
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static struct ipmi_user_hndl ipmi_poweroff_handler =
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{
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.ipmi_recv_hndl = receive_handler
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};
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static int ipmi_request_wait_for_response(ipmi_user_t user,
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struct ipmi_addr *addr,
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struct kernel_ipmi_msg *send_msg)
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{
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int rv;
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struct semaphore sem;
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sema_init (&sem, 0);
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rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &sem,
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&halt_smi_msg, &halt_recv_msg, 0);
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if (rv)
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return rv;
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down (&sem);
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return halt_recv_msg.msg.data[0];
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}
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/* We are in run-to-completion mode, no semaphore is desired. */
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static int ipmi_request_in_rc_mode(ipmi_user_t user,
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struct ipmi_addr *addr,
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struct kernel_ipmi_msg *send_msg)
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{
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int rv;
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rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL,
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&halt_smi_msg, &halt_recv_msg, 0);
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if (rv)
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return rv;
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return halt_recv_msg.msg.data[0];
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}
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/*
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* ATCA Support
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*/
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#define IPMI_NETFN_ATCA 0x2c
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#define IPMI_ATCA_SET_POWER_CMD 0x11
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#define IPMI_ATCA_GET_ADDR_INFO_CMD 0x01
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#define IPMI_PICMG_ID 0
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static int ipmi_atca_detect (ipmi_user_t user)
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{
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struct ipmi_system_interface_addr smi_addr;
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struct kernel_ipmi_msg send_msg;
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int rv;
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unsigned char data[1];
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/*
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* Configure IPMI address for local access
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*/
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smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
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smi_addr.channel = IPMI_BMC_CHANNEL;
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smi_addr.lun = 0;
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/*
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* Use get address info to check and see if we are ATCA
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*/
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send_msg.netfn = IPMI_NETFN_ATCA;
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send_msg.cmd = IPMI_ATCA_GET_ADDR_INFO_CMD;
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data[0] = IPMI_PICMG_ID;
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send_msg.data = data;
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send_msg.data_len = sizeof(data);
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rv = ipmi_request_wait_for_response(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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return !rv;
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}
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static void ipmi_poweroff_atca (ipmi_user_t user)
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{
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struct ipmi_system_interface_addr smi_addr;
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struct kernel_ipmi_msg send_msg;
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int rv;
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unsigned char data[4];
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/*
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* Configure IPMI address for local access
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*/
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smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
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smi_addr.channel = IPMI_BMC_CHANNEL;
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smi_addr.lun = 0;
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printk(KERN_INFO PFX "Powering down via ATCA power command\n");
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/*
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* Power down
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*/
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send_msg.netfn = IPMI_NETFN_ATCA;
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send_msg.cmd = IPMI_ATCA_SET_POWER_CMD;
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data[0] = IPMI_PICMG_ID;
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data[1] = 0; /* FRU id */
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data[2] = 0; /* Power Level */
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data[3] = 0; /* Don't change saved presets */
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send_msg.data = data;
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send_msg.data_len = sizeof (data);
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rv = ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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if (rv) {
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printk(KERN_ERR PFX "Unable to send ATCA powerdown message,"
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" IPMI error 0x%x\n", rv);
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goto out;
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}
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out:
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return;
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}
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/*
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* CPI1 Support
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*/
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#define IPMI_NETFN_OEM_1 0xf8
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#define OEM_GRP_CMD_SET_RESET_STATE 0x84
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#define OEM_GRP_CMD_SET_POWER_STATE 0x82
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#define IPMI_NETFN_OEM_8 0xf8
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#define OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL 0x80
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#define OEM_GRP_CMD_GET_SLOT_GA 0xa3
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#define IPMI_NETFN_SENSOR_EVT 0x10
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#define IPMI_CMD_GET_EVENT_RECEIVER 0x01
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#define IPMI_CPI1_PRODUCT_ID 0x000157
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#define IPMI_CPI1_MANUFACTURER_ID 0x0108
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static int ipmi_cpi1_detect (ipmi_user_t user)
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{
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return ((mfg_id == IPMI_CPI1_MANUFACTURER_ID)
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&& (prod_id == IPMI_CPI1_PRODUCT_ID));
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}
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static void ipmi_poweroff_cpi1 (ipmi_user_t user)
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{
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struct ipmi_system_interface_addr smi_addr;
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struct ipmi_ipmb_addr ipmb_addr;
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struct kernel_ipmi_msg send_msg;
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int rv;
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unsigned char data[1];
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int slot;
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unsigned char hotswap_ipmb;
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unsigned char aer_addr;
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unsigned char aer_lun;
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/*
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* Configure IPMI address for local access
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*/
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smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
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smi_addr.channel = IPMI_BMC_CHANNEL;
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smi_addr.lun = 0;
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printk(KERN_INFO PFX "Powering down via CPI1 power command\n");
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/*
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* Get IPMI ipmb address
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*/
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send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
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send_msg.cmd = OEM_GRP_CMD_GET_SLOT_GA;
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send_msg.data = NULL;
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send_msg.data_len = 0;
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rv = ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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if (rv)
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goto out;
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slot = halt_recv_msg.msg.data[1];
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hotswap_ipmb = (slot > 9) ? (0xb0 + 2 * slot) : (0xae + 2 * slot);
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/*
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* Get active event receiver
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*/
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send_msg.netfn = IPMI_NETFN_SENSOR_EVT >> 2;
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send_msg.cmd = IPMI_CMD_GET_EVENT_RECEIVER;
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send_msg.data = NULL;
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send_msg.data_len = 0;
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rv = ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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if (rv)
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goto out;
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aer_addr = halt_recv_msg.msg.data[1];
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aer_lun = halt_recv_msg.msg.data[2];
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/*
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* Setup IPMB address target instead of local target
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*/
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ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
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ipmb_addr.channel = 0;
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ipmb_addr.slave_addr = aer_addr;
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ipmb_addr.lun = aer_lun;
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/*
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* Send request hotswap control to remove blade from dpv
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*/
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send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
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send_msg.cmd = OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL;
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send_msg.data = &hotswap_ipmb;
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send_msg.data_len = 1;
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ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &ipmb_addr,
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&send_msg);
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/*
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* Set reset asserted
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*/
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send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
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send_msg.cmd = OEM_GRP_CMD_SET_RESET_STATE;
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send_msg.data = data;
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data[0] = 1; /* Reset asserted state */
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send_msg.data_len = 1;
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rv = ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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if (rv)
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goto out;
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/*
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* Power down
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*/
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send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
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send_msg.cmd = OEM_GRP_CMD_SET_POWER_STATE;
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send_msg.data = data;
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data[0] = 1; /* Power down state */
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send_msg.data_len = 1;
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rv = ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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if (rv)
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goto out;
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out:
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return;
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}
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/*
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* Standard chassis support
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*/
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#define IPMI_NETFN_CHASSIS_REQUEST 0
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#define IPMI_CHASSIS_CONTROL_CMD 0x02
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static int ipmi_chassis_detect (ipmi_user_t user)
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{
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/* Chassis support, use it. */
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return (capabilities & 0x80);
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}
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static void ipmi_poweroff_chassis (ipmi_user_t user)
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{
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struct ipmi_system_interface_addr smi_addr;
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struct kernel_ipmi_msg send_msg;
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int rv;
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unsigned char data[1];
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/*
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* Configure IPMI address for local access
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*/
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smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
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smi_addr.channel = IPMI_BMC_CHANNEL;
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smi_addr.lun = 0;
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printk(KERN_INFO PFX "Powering down via IPMI chassis control command\n");
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/*
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* Power down
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*/
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send_msg.netfn = IPMI_NETFN_CHASSIS_REQUEST;
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send_msg.cmd = IPMI_CHASSIS_CONTROL_CMD;
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data[0] = 0; /* Power down */
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send_msg.data = data;
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send_msg.data_len = sizeof(data);
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rv = ipmi_request_in_rc_mode(user,
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(struct ipmi_addr *) &smi_addr,
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&send_msg);
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if (rv) {
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printk(KERN_ERR PFX "Unable to send chassis powerdown message,"
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" IPMI error 0x%x\n", rv);
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goto out;
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}
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out:
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||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Table of possible power off functions. */
|
||
|
|
struct poweroff_function {
|
||
|
|
char *platform_type;
|
||
|
|
int (*detect)(ipmi_user_t user);
|
||
|
|
void (*poweroff_func)(ipmi_user_t user);
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct poweroff_function poweroff_functions[] = {
|
||
|
|
{ .platform_type = "ATCA",
|
||
|
|
.detect = ipmi_atca_detect,
|
||
|
|
.poweroff_func = ipmi_poweroff_atca },
|
||
|
|
{ .platform_type = "CPI1",
|
||
|
|
.detect = ipmi_cpi1_detect,
|
||
|
|
.poweroff_func = ipmi_poweroff_cpi1 },
|
||
|
|
/* Chassis should generally be last, other things should override
|
||
|
|
it. */
|
||
|
|
{ .platform_type = "chassis",
|
||
|
|
.detect = ipmi_chassis_detect,
|
||
|
|
.poweroff_func = ipmi_poweroff_chassis },
|
||
|
|
};
|
||
|
|
#define NUM_PO_FUNCS (sizeof(poweroff_functions) \
|
||
|
|
/ sizeof(struct poweroff_function))
|
||
|
|
|
||
|
|
|
||
|
|
/* Our local state. */
|
||
|
|
static int ready = 0;
|
||
|
|
static ipmi_user_t ipmi_user;
|
||
|
|
static void (*specific_poweroff_func)(ipmi_user_t user) = NULL;
|
||
|
|
|
||
|
|
/* Holds the old poweroff function so we can restore it on removal. */
|
||
|
|
static void (*old_poweroff_func)(void);
|
||
|
|
|
||
|
|
|
||
|
|
/* Called on a powerdown request. */
|
||
|
|
static void ipmi_poweroff_function (void)
|
||
|
|
{
|
||
|
|
if (!ready)
|
||
|
|
return;
|
||
|
|
|
||
|
|
/* Use run-to-completion mode, since interrupts may be off. */
|
||
|
|
ipmi_user_set_run_to_completion(ipmi_user, 1);
|
||
|
|
specific_poweroff_func(ipmi_user);
|
||
|
|
ipmi_user_set_run_to_completion(ipmi_user, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Wait for an IPMI interface to be installed, the first one installed
|
||
|
|
will be grabbed by this code and used to perform the powerdown. */
|
||
|
|
static void ipmi_po_new_smi(int if_num)
|
||
|
|
{
|
||
|
|
struct ipmi_system_interface_addr smi_addr;
|
||
|
|
struct kernel_ipmi_msg send_msg;
|
||
|
|
int rv;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (ready)
|
||
|
|
return;
|
||
|
|
|
||
|
|
rv = ipmi_create_user(if_num, &ipmi_poweroff_handler, NULL, &ipmi_user);
|
||
|
|
if (rv) {
|
||
|
|
printk(KERN_ERR PFX "could not create IPMI user, error %d\n",
|
||
|
|
rv);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Do a get device ide and store some results, since this is
|
||
|
|
* used by several functions.
|
||
|
|
*/
|
||
|
|
smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
|
||
|
|
smi_addr.channel = IPMI_BMC_CHANNEL;
|
||
|
|
smi_addr.lun = 0;
|
||
|
|
|
||
|
|
send_msg.netfn = IPMI_NETFN_APP_REQUEST;
|
||
|
|
send_msg.cmd = IPMI_GET_DEVICE_ID_CMD;
|
||
|
|
send_msg.data = NULL;
|
||
|
|
send_msg.data_len = 0;
|
||
|
|
rv = ipmi_request_wait_for_response(ipmi_user,
|
||
|
|
(struct ipmi_addr *) &smi_addr,
|
||
|
|
&send_msg);
|
||
|
|
if (rv) {
|
||
|
|
printk(KERN_ERR PFX "Unable to send IPMI get device id info,"
|
||
|
|
" IPMI error 0x%x\n", rv);
|
||
|
|
goto out_err;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (halt_recv_msg.msg.data_len < 12) {
|
||
|
|
printk(KERN_ERR PFX "(chassis) IPMI get device id info too,"
|
||
|
|
" short, was %d bytes, needed %d bytes\n",
|
||
|
|
halt_recv_msg.msg.data_len, 12);
|
||
|
|
goto out_err;
|
||
|
|
}
|
||
|
|
|
||
|
|
mfg_id = (halt_recv_msg.msg.data[7]
|
||
|
|
| (halt_recv_msg.msg.data[8] << 8)
|
||
|
|
| (halt_recv_msg.msg.data[9] << 16));
|
||
|
|
prod_id = (halt_recv_msg.msg.data[10]
|
||
|
|
| (halt_recv_msg.msg.data[11] << 8));
|
||
|
|
capabilities = halt_recv_msg.msg.data[6];
|
||
|
|
|
||
|
|
|
||
|
|
/* Scan for a poweroff method */
|
||
|
|
for (i=0; i<NUM_PO_FUNCS; i++) {
|
||
|
|
if (poweroff_functions[i].detect(ipmi_user))
|
||
|
|
goto found;
|
||
|
|
}
|
||
|
|
|
||
|
|
out_err:
|
||
|
|
printk(KERN_ERR PFX "Unable to find a poweroff function that"
|
||
|
|
" will work, giving up\n");
|
||
|
|
ipmi_destroy_user(ipmi_user);
|
||
|
|
return;
|
||
|
|
|
||
|
|
found:
|
||
|
|
printk(KERN_INFO PFX "Found a %s style poweroff function\n",
|
||
|
|
poweroff_functions[i].platform_type);
|
||
|
|
specific_poweroff_func = poweroff_functions[i].poweroff_func;
|
||
|
|
old_poweroff_func = pm_power_off;
|
||
|
|
pm_power_off = ipmi_poweroff_function;
|
||
|
|
ready = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ipmi_po_smi_gone(int if_num)
|
||
|
|
{
|
||
|
|
/* This can never be called, because once poweroff driver is
|
||
|
|
registered, the interface can't go away until the power
|
||
|
|
driver is unregistered. */
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct ipmi_smi_watcher smi_watcher =
|
||
|
|
{
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.new_smi = ipmi_po_new_smi,
|
||
|
|
.smi_gone = ipmi_po_smi_gone
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Startup and shutdown functions.
|
||
|
|
*/
|
||
|
|
static int ipmi_poweroff_init (void)
|
||
|
|
{
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
printk ("Copyright (C) 2004 MontaVista Software -"
|
||
|
|
" IPMI Powerdown via sys_reboot version "
|
||
|
|
IPMI_POWEROFF_VERSION ".\n");
|
||
|
|
|
||
|
|
rv = ipmi_smi_watcher_register(&smi_watcher);
|
||
|
|
if (rv)
|
||
|
|
printk(KERN_ERR PFX "Unable to register SMI watcher: %d\n", rv);
|
||
|
|
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef MODULE
|
||
|
|
static __exit void ipmi_poweroff_cleanup(void)
|
||
|
|
{
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
ipmi_smi_watcher_unregister(&smi_watcher);
|
||
|
|
|
||
|
|
if (ready) {
|
||
|
|
rv = ipmi_destroy_user(ipmi_user);
|
||
|
|
if (rv)
|
||
|
|
printk(KERN_ERR PFX "could not cleanup the IPMI"
|
||
|
|
" user: 0x%x\n", rv);
|
||
|
|
pm_power_off = old_poweroff_func;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
module_exit(ipmi_poweroff_cleanup);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
module_init(ipmi_poweroff_init);
|
||
|
|
MODULE_LICENSE("GPL");
|