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path: root/drivers/char/ipmi/ipmi_poweroff.c
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Diffstat (limited to 'drivers/char/ipmi/ipmi_poweroff.c')
-rw-r--r--drivers/char/ipmi/ipmi_poweroff.c137
1 files changed, 116 insertions, 21 deletions
diff --git a/drivers/char/ipmi/ipmi_poweroff.c b/drivers/char/ipmi/ipmi_poweroff.c
index cb5cdc6f14b..f951c30236c 100644
--- a/drivers/char/ipmi/ipmi_poweroff.c
+++ b/drivers/char/ipmi/ipmi_poweroff.c
@@ -31,10 +31,13 @@
* 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/config.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/proc_fs.h>
#include <linux/string.h>
+#include <linux/completion.h>
+#include <linux/kdev_t.h>
#include <linux/ipmi.h>
#include <linux/ipmi_smi.h>
@@ -44,6 +47,18 @@
/* Where to we insert our poweroff function? */
extern void (*pm_power_off)(void);
+/* Definitions for controlling power off (if the system supports it). It
+ * conveniently matches the IPMI chassis control values. */
+#define IPMI_CHASSIS_POWER_DOWN 0 /* power down, the default. */
+#define IPMI_CHASSIS_POWER_CYCLE 0x02 /* power cycle */
+
+/* the IPMI data command */
+static int poweroff_control = IPMI_CHASSIS_POWER_DOWN;
+
+/* parameter definition to allow user to flag power cycle */
+module_param(poweroff_control, int, IPMI_CHASSIS_POWER_DOWN);
+MODULE_PARM_DESC(poweroff_control, " Set to 2 to enable power cycle instead of power down. Power cycle is contingent on hardware support, otherwise it defaults back to power down.");
+
/* Stuff from the get device id command. */
static unsigned int mfg_id;
static unsigned int prod_id;
@@ -75,10 +90,10 @@ static struct ipmi_recv_msg halt_recv_msg =
static void receive_handler(struct ipmi_recv_msg *recv_msg, void *handler_data)
{
- struct semaphore *sem = recv_msg->user_msg_data;
+ struct completion *comp = recv_msg->user_msg_data;
- if (sem)
- up(sem);
+ if (comp)
+ complete(comp);
}
static struct ipmi_user_hndl ipmi_poweroff_handler =
@@ -91,27 +106,27 @@ 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;
+ int rv;
+ struct completion comp;
- sema_init (&sem, 0);
+ init_completion(&comp);
- rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &sem,
+ rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &comp,
&halt_smi_msg, &halt_recv_msg, 0);
if (rv)
return rv;
- down (&sem);
+ wait_for_completion(&comp);
return halt_recv_msg.msg.data[0];
}
-/* We are in run-to-completion mode, no semaphore is desired. */
+/* We are in run-to-completion mode, no completion 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;
+ int rv;
rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL,
&halt_smi_msg, &halt_recv_msg, 0);
@@ -349,26 +364,38 @@ static void ipmi_poweroff_chassis (ipmi_user_t user)
smi_addr.channel = IPMI_BMC_CHANNEL;
smi_addr.lun = 0;
- printk(KERN_INFO PFX "Powering down via IPMI chassis control command\n");
+ powercyclefailed:
+ printk(KERN_INFO PFX "Powering %s via IPMI chassis control command\n",
+ ((poweroff_control != IPMI_CHASSIS_POWER_CYCLE) ? "down" : "cycle"));
/*
* Power down
*/
send_msg.netfn = IPMI_NETFN_CHASSIS_REQUEST;
send_msg.cmd = IPMI_CHASSIS_CONTROL_CMD;
- data[0] = 0; /* Power down */
+ data[0] = poweroff_control;
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;
+ switch (poweroff_control) {
+ case IPMI_CHASSIS_POWER_CYCLE:
+ /* power cycle failed, default to power down */
+ printk(KERN_ERR PFX "Unable to send chassis power " \
+ "cycle message, IPMI error 0x%x\n", rv);
+ poweroff_control = IPMI_CHASSIS_POWER_DOWN;
+ goto powercyclefailed;
+
+ case IPMI_CHASSIS_POWER_DOWN:
+ default:
+ printk(KERN_ERR PFX "Unable to send chassis power " \
+ "down message, IPMI error 0x%x\n", rv);
+ break;
+ }
}
- out:
return;
}
@@ -430,7 +457,8 @@ static void ipmi_po_new_smi(int if_num)
if (ready)
return;
- rv = ipmi_create_user(if_num, &ipmi_poweroff_handler, NULL, &ipmi_user);
+ 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);
@@ -509,21 +537,84 @@ static struct ipmi_smi_watcher smi_watcher =
};
+#ifdef CONFIG_PROC_FS
+/* displays properties to proc */
+static int proc_read_chassctrl(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ return sprintf(page, "%d\t[ 0=powerdown 2=powercycle ]\n",
+ poweroff_control);
+}
+
+/* process property writes from proc */
+static int proc_write_chassctrl(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ int rv = count;
+ unsigned int newval = 0;
+
+ sscanf(buffer, "%d", &newval);
+ switch (newval) {
+ case IPMI_CHASSIS_POWER_CYCLE:
+ printk(KERN_INFO PFX "power cycle is now enabled\n");
+ poweroff_control = newval;
+ break;
+
+ case IPMI_CHASSIS_POWER_DOWN:
+ poweroff_control = IPMI_CHASSIS_POWER_DOWN;
+ break;
+
+ default:
+ rv = -EINVAL;
+ break;
+ }
+
+ return rv;
+}
+#endif /* CONFIG_PROC_FS */
+
/*
* Startup and shutdown functions.
*/
static int ipmi_poweroff_init (void)
{
- int rv;
+ int rv;
+ struct proc_dir_entry *file;
printk ("Copyright (C) 2004 MontaVista Software -"
" IPMI Powerdown via sys_reboot version "
IPMI_POWEROFF_VERSION ".\n");
+ switch (poweroff_control) {
+ case IPMI_CHASSIS_POWER_CYCLE:
+ printk(KERN_INFO PFX "Power cycle is enabled.\n");
+ break;
+
+ case IPMI_CHASSIS_POWER_DOWN:
+ default:
+ poweroff_control = IPMI_CHASSIS_POWER_DOWN;
+ break;
+ }
+
rv = ipmi_smi_watcher_register(&smi_watcher);
- if (rv)
+ if (rv) {
printk(KERN_ERR PFX "Unable to register SMI watcher: %d\n", rv);
+ goto out_err;
+ }
+
+#ifdef CONFIG_PROC_FS
+ file = create_proc_entry("poweroff_control", 0, proc_ipmi_root);
+ if (!file) {
+ printk(KERN_ERR PFX "Unable to create proc power control\n");
+ } else {
+ file->nlink = 1;
+ file->read_proc = proc_read_chassctrl;
+ file->write_proc = proc_write_chassctrl;
+ file->owner = THIS_MODULE;
+ }
+#endif
+ out_err:
return rv;
}
@@ -532,6 +623,10 @@ static __exit void ipmi_poweroff_cleanup(void)
{
int rv;
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("poweroff_control", proc_ipmi_root);
+#endif
+
ipmi_smi_watcher_unregister(&smi_watcher);
if (ready) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-14 20:00:51 +0000