Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 549 insertions, 0 deletions

diff --git a/drivers/char/ipmi/ipmi_poweroff.c b/drivers/char/ipmi/ipmi_poweroff.c
new file mode 100644
index 00000000000..cb5cdc6f14b
--- /dev/null
+++ b/drivers/char/ipmi/ipmi_poweroff.c
@@ -0,0 +1,549 @@
+/*
+ * ipmi_poweroff.c
+ *
+ * MontaVista IPMI Poweroff extension to sys_reboot
+ *
+ * Author: MontaVista Software, Inc.
+ *         Steven Dake <sdake@mvista.com>
+ *         Corey Minyard <cminyard@mvista.com>
+ *         source@mvista.com
+ *
+ * Copyright 2002,2004 MontaVista Software Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <asm/semaphore.h>
+#include <linux/kdev_t.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/ipmi.h>
+#include <linux/ipmi_smi.h>
+
+#define PFX "IPMI poweroff: "
+#define IPMI_POWEROFF_VERSION   "v33"
+
+/* Where to we insert our poweroff function? */
+extern void (*pm_power_off)(void);
+
+/* Stuff from the get device id command. */
+static unsigned int mfg_id;
+static unsigned int prod_id;
+static unsigned char capabilities;
+
+/* We use our own messages for this operation, we don't let the system
+   allocate them, since we may be in a panic situation.  The whole
+   thing is single-threaded, anyway, so multiple messages are not
+   required. */
+static void dummy_smi_free(struct ipmi_smi_msg *msg)
+{
+}
+static void dummy_recv_free(struct ipmi_recv_msg *msg)
+{
+}
+static struct ipmi_smi_msg halt_smi_msg =
+{
+        .done = dummy_smi_free
+};
+static struct ipmi_recv_msg halt_recv_msg =
+{
+        .done = dummy_recv_free
+};
+
+
+/*
+ * Code to send a message and wait for the reponse.
+ */
+
+static void receive_handler(struct ipmi_recv_msg *recv_msg, void *handler_data)
+{
+        struct semaphore *sem = recv_msg->user_msg_data;
+
+        if (sem)
+                up(sem);
+}
+
+static struct ipmi_user_hndl ipmi_poweroff_handler =
+{
+        .ipmi_recv_hndl = receive_handler
+};
+
+
+static int ipmi_request_wait_for_response(ipmi_user_t            user,
+                                          struct ipmi_addr       *addr,
+                                          struct kernel_ipmi_msg *send_msg)
+{
+        int              rv;
+        struct semaphore sem;
+
+        sema_init (&sem, 0);
+
+        rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &sem,
+                                      &halt_smi_msg, &halt_recv_msg, 0);
+        if (rv)
+                return rv;
+
+        down (&sem);
+
+        return halt_recv_msg.msg.data[0];
+}
+
+/* We are in run-to-completion mode, no semaphore is desired. */
+static int ipmi_request_in_rc_mode(ipmi_user_t            user,
+                                   struct ipmi_addr       *addr,
+                                   struct kernel_ipmi_msg *send_msg)
+{
+        int              rv;
+
+        rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL,
+                                      &halt_smi_msg, &halt_recv_msg, 0);
+        if (rv)
+                return rv;
+
+        return halt_recv_msg.msg.data[0];
+}
+
+/*
+ * ATCA Support
+ */
+
+#define IPMI_NETFN_ATCA                 0x2c
+#define IPMI_ATCA_SET_POWER_CMD         0x11
+#define IPMI_ATCA_GET_ADDR_INFO_CMD     0x01
+#define IPMI_PICMG_ID                   0
+
+static int ipmi_atca_detect (ipmi_user_t user)
+{
+        struct ipmi_system_interface_addr smi_addr;
+        struct kernel_ipmi_msg            send_msg;
+        int                               rv;
+        unsigned char                     data[1];
+
+        /*
+         * Configure IPMI address for local access
+         */
+        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
+        smi_addr.channel = IPMI_BMC_CHANNEL;
+        smi_addr.lun = 0;
+
+        /*
+         * Use get address info to check and see if we are ATCA
+         */
+        send_msg.netfn = IPMI_NETFN_ATCA;
+        send_msg.cmd = IPMI_ATCA_GET_ADDR_INFO_CMD;
+        data[0] = IPMI_PICMG_ID;
+        send_msg.data = data;
+        send_msg.data_len = sizeof(data);
+        rv = ipmi_request_wait_for_response(user,
+                                            (struct ipmi_addr *) &smi_addr,
+                                            &send_msg);
+        return !rv;
+}
+
+static void ipmi_poweroff_atca (ipmi_user_t user)
+{
+        struct ipmi_system_interface_addr smi_addr;
+        struct kernel_ipmi_msg            send_msg;
+        int                               rv;
+        unsigned char                     data[4];
+
+        /*
+         * Configure IPMI address for local access
+         */
+        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
+        smi_addr.channel = IPMI_BMC_CHANNEL;
+        smi_addr.lun = 0;
+
+        printk(KERN_INFO PFX "Powering down via ATCA power command\n");
+
+        /*
+         * Power down
+         */
+        send_msg.netfn = IPMI_NETFN_ATCA;
+        send_msg.cmd = IPMI_ATCA_SET_POWER_CMD;
+        data[0] = IPMI_PICMG_ID;
+        data[1] = 0; /* FRU id */
+        data[2] = 0; /* Power Level */
+        data[3] = 0; /* Don't change saved presets */
+        send_msg.data = data;
+        send_msg.data_len = sizeof (data);
+        rv = ipmi_request_in_rc_mode(user,
+                                     (struct ipmi_addr *) &smi_addr,
+                                     &send_msg);
+        if (rv) {
+                printk(KERN_ERR PFX "Unable to send ATCA powerdown message,"
+                       " IPMI error 0x%x\n", rv);
+                goto out;
+        }
+
+ out:
+        return;
+}
+
+/*
+ * CPI1 Support
+ */
+
+#define IPMI_NETFN_OEM_1                                0xf8
+#define OEM_GRP_CMD_SET_RESET_STATE             0x84
+#define OEM_GRP_CMD_SET_POWER_STATE             0x82
+#define IPMI_NETFN_OEM_8                                0xf8
+#define OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL        0x80
+#define OEM_GRP_CMD_GET_SLOT_GA                 0xa3
+#define IPMI_NETFN_SENSOR_EVT                   0x10
+#define IPMI_CMD_GET_EVENT_RECEIVER             0x01
+
+#define IPMI_CPI1_PRODUCT_ID            0x000157
+#define IPMI_CPI1_MANUFACTURER_ID       0x0108
+
+static int ipmi_cpi1_detect (ipmi_user_t user)
+{
+        return ((mfg_id == IPMI_CPI1_MANUFACTURER_ID)
+                && (prod_id == IPMI_CPI1_PRODUCT_ID));
+}
+
+static void ipmi_poweroff_cpi1 (ipmi_user_t user)
+{
+        struct ipmi_system_interface_addr smi_addr;
+        struct ipmi_ipmb_addr             ipmb_addr;
+        struct kernel_ipmi_msg            send_msg;
+        int                               rv;
+        unsigned char                     data[1];
+        int                               slot;
+        unsigned char                     hotswap_ipmb;
+        unsigned char                     aer_addr;
+        unsigned char                     aer_lun;
+
+        /*
+         * Configure IPMI address for local access
+         */
+        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
+        smi_addr.channel = IPMI_BMC_CHANNEL;
+        smi_addr.lun = 0;
+
+        printk(KERN_INFO PFX "Powering down via CPI1 power command\n");
+
+        /*
+         * Get IPMI ipmb address
+         */
+        send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
+        send_msg.cmd = OEM_GRP_CMD_GET_SLOT_GA;
+        send_msg.data = NULL;
+        send_msg.data_len = 0;
+        rv = ipmi_request_in_rc_mode(user,
+                                     (struct ipmi_addr *) &smi_addr,
+                                     &send_msg);
+        if (rv)
+                goto out;
+        slot = halt_recv_msg.msg.data[1];
+        hotswap_ipmb = (slot > 9) ? (0xb0 + 2 * slot) : (0xae + 2 * slot);
+
+        /*
+         * Get active event receiver
+         */
+        send_msg.netfn = IPMI_NETFN_SENSOR_EVT >> 2;
+        send_msg.cmd = IPMI_CMD_GET_EVENT_RECEIVER;
+        send_msg.data = NULL;
+        send_msg.data_len = 0;
+        rv = ipmi_request_in_rc_mode(user,
+                                     (struct ipmi_addr *) &smi_addr,
+                                     &send_msg);
+        if (rv)
+                goto out;
+        aer_addr = halt_recv_msg.msg.data[1];
+        aer_lun = halt_recv_msg.msg.data[2];
+
+        /*
+         * Setup IPMB address target instead of local target
+         */
+        ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
+        ipmb_addr.channel = 0;
+        ipmb_addr.slave_addr = aer_addr;
+        ipmb_addr.lun = aer_lun;
+
+        /*
+         * Send request hotswap control to remove blade from dpv
+         */
+        send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
+        send_msg.cmd = OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL;
+        send_msg.data = &hotswap_ipmb;
+        send_msg.data_len = 1;
+        ipmi_request_in_rc_mode(user,
+                                (struct ipmi_addr *) &ipmb_addr,
+                                &send_msg);
+
+        /*
+         * Set reset asserted
+         */
+        send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
+        send_msg.cmd = OEM_GRP_CMD_SET_RESET_STATE;
+        send_msg.data = data;
+        data[0] = 1; /* Reset asserted state */
+        send_msg.data_len = 1;
+        rv = ipmi_request_in_rc_mode(user,
+                                     (struct ipmi_addr *) &smi_addr,
+                                     &send_msg);
+        if (rv)
+                goto out;
+
+        /*
+         * Power down
+         */
+        send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
+        send_msg.cmd = OEM_GRP_CMD_SET_POWER_STATE;
+        send_msg.data = data;
+        data[0] = 1; /* Power down state */
+        send_msg.data_len = 1;
+        rv = ipmi_request_in_rc_mode(user,
+                                     (struct ipmi_addr *) &smi_addr,
+                                     &send_msg);
+        if (rv)
+                goto out;
+
+ out:
+        return;
+}
+
+/*
+ * Standard chassis support
+ */
+
+#define IPMI_NETFN_CHASSIS_REQUEST      0
+#define IPMI_CHASSIS_CONTROL_CMD        0x02
+
+static int ipmi_chassis_detect (ipmi_user_t user)
+{
+        /* Chassis support, use it. */
+        return (capabilities & 0x80);
+}
+
+static void ipmi_poweroff_chassis (ipmi_user_t user)
+{
+        struct ipmi_system_interface_addr smi_addr;
+        struct kernel_ipmi_msg            send_msg;
+        int                               rv;
+        unsigned char                     data[1];
+
+        /*
+         * Configure IPMI address for local access
+         */
+        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
+        smi_addr.channel = IPMI_BMC_CHANNEL;
+        smi_addr.lun = 0;
+
+        printk(KERN_INFO PFX "Powering down via IPMI chassis control command\n");
+
+        /*
+         * Power down
+         */
+        send_msg.netfn = IPMI_NETFN_CHASSIS_REQUEST;
+        send_msg.cmd = IPMI_CHASSIS_CONTROL_CMD;
+        data[0] = 0; /* Power down */
+        send_msg.data = data;
+        send_msg.data_len = sizeof(data);
+        rv = ipmi_request_in_rc_mode(user,
+                                     (struct ipmi_addr *) &smi_addr,
+                                     &send_msg);
+        if (rv) {
+                printk(KERN_ERR PFX "Unable to send chassis powerdown message,"
+                       " IPMI error 0x%x\n", rv);
+                goto out;
+        }
+
+ out:
+        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");