svn commit: r324990 - in head: share/man/man4 sys/dev/ipmi sys/sys
Warner Losh
imp at FreeBSD.org
Wed Oct 25 15:30:55 UTC 2017
Author: imp
Date: Wed Oct 25 15:30:53 2017
New Revision: 324990
URL: https://svnweb.freebsd.org/changeset/base/324990
Log:
Implement IPMI support for RB_POWRECYCLE
Some BMCs support power cycling the chassis via the chassis control
command 2 subcommand 2 (ipmitool called it 'chassis power cycle'). If
the BMC supports the chassis device, register a shutdown_final handler
that sends the power cycle command if request and waits up to 10s for
it to take effect. To minimize stack strain, we preallocate a ipmi
request in the softc. At the moment, we're verbose about what we're
doing.
Sponsored by: Netflix
Modified:
head/share/man/man4/ipmi.4
head/sys/dev/ipmi/ipmi.c
head/sys/dev/ipmi/ipmivars.h
head/sys/sys/ipmi.h
Modified: head/share/man/man4/ipmi.4
==============================================================================
--- head/share/man/man4/ipmi.4 Wed Oct 25 15:30:48 2017 (r324989)
+++ head/share/man/man4/ipmi.4 Wed Oct 25 15:30:53 2017 (r324990)
@@ -90,6 +90,17 @@ is heavily adopted from the standard and
.Tn Linux
driver; however, not all features described in the
standard are supported.
+.Pp
+The
+.Nm
+driver implements the power cycling option to
+.Xr shutdown 8
+to implement power cycling of the system.
+The motherboard's BMC must support the chassis device and the optional
+power cycle subcomand of the chassis control command as described in section 28.3
+if the IPMI standard.
+The length of time the system is off will be at least one second, but
+may be longer if the power cycle interval has been set (see section 28.9).
.Sh IOCTLS
Sending and receiving messages through the
.Nm
@@ -179,6 +190,8 @@ An address supplied was invalid.
.Sh SEE ALSO
.Xr ioctl 2 ,
.Xr watchdog 4 ,
+.Xr reboot 8 ,
+.Xr shutdown 8 ,
.Xr watchdog 8 ,
.Xr watchdogd 8 ,
.Xr watchdog 9
Modified: head/sys/dev/ipmi/ipmi.c
==============================================================================
--- head/sys/dev/ipmi/ipmi.c Wed Oct 25 15:30:48 2017 (r324989)
+++ head/sys/dev/ipmi/ipmi.c Wed Oct 25 15:30:53 2017 (r324990)
@@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/poll.h>
+#include <sys/reboot.h>
#include <sys/rman.h>
#include <sys/selinfo.h>
#include <sys/sysctl.h>
@@ -690,6 +691,45 @@ ipmi_wd_event(void *arg, unsigned int cmd, int *error)
}
static void
+ipmi_power_cycle(void *arg, int howto)
+{
+ struct ipmi_softc *sc = arg;
+ struct ipmi_request *req;
+
+ /*
+ * Ignore everything except power cycling requests
+ */
+ if ((howto & RB_POWERCYCLE) == 0)
+ return;
+
+ device_printf(sc->ipmi_dev, "Power cycling using IPMI\n");
+
+ /*
+ * Send a CHASSIS_CONTROL command to the CHASSIS device, subcommand 2
+ * as described in IPMI v2.0 spec section 28.3.
+ */
+ IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_CHASSIS_REQUEST, 0),
+ IPMI_CHASSIS_CONTROL, 1, 0);
+ req->ir_request[0] = IPMI_CC_POWER_CYCLE;
+
+ ipmi_submit_driver_request(sc, req, MAX_TIMEOUT);
+
+ if (req->ir_error != 0 || req->ir_compcode != 0) {
+ device_printf(sc->ipmi_dev, "Power cycling via IPMI failed code %#x %#x\n",
+ req->ir_error, req->ir_compcode);
+ return;
+ }
+
+ /*
+ * BMCs are notoriously slow, give it up to 10s to effect the power
+ * down leg of the power cycle. If that fails, fallback to the next
+ * hanlder in the shutdown_final chain and/or the platform failsafe.
+ */
+ DELAY(10 * 1000 * 1000);
+ device_printf(sc->ipmi_dev, "Power cycling via IPMI timed out\n");
+}
+
+static void
ipmi_startup(void *arg)
{
struct ipmi_softc *sc = arg;
@@ -737,11 +777,13 @@ ipmi_startup(void *arg)
}
device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d%d, "
- "version %d.%d\n",
- req->ir_reply[1] & 0x0f,
- req->ir_reply[2] & 0x7f, req->ir_reply[3] >> 4, req->ir_reply[3] & 0x0f,
- req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4);
+ "version %d.%d, device support mask %#x\n",
+ req->ir_reply[1] & 0x0f,
+ req->ir_reply[2] & 0x7f, req->ir_reply[3] >> 4, req->ir_reply[3] & 0x0f,
+ req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4, req->ir_reply[5]);
+ sc->ipmi_dev_support = req->ir_reply[5];
+
IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
IPMI_CLEAR_FLAGS, 1, 0);
@@ -792,6 +834,17 @@ ipmi_startup(void *arg)
return;
}
sc->ipmi_cdev->si_drv1 = sc;
+
+ /*
+ * Power cycle the system off using IPMI. We use last - 1 since we don't
+ * handle all the other kinds of reboots. We'll let others handle them.
+ * We only try to do this if the BMC supports the Chassis device.
+ */
+ if (sc->ipmi_dev_support & IPMI_ADS_CHASSIS) {
+ device_printf(dev, "Establishing power cycle handler\n");
+ sc->ipmi_power_cycle_tag = EVENTHANDLER_REGISTER(shutdown_final,
+ ipmi_power_cycle, sc, SHUTDOWN_PRI_LAST - 1);
+ }
}
int
@@ -843,6 +896,10 @@ ipmi_detach(device_t dev)
EVENTHANDLER_DEREGISTER(watchdog_list, sc->ipmi_watchdog_tag);
ipmi_set_watchdog(sc, 0);
}
+
+ /* Detach from shutdown handling for power cycle reboot */
+ if (sc->ipmi_power_cycle_tag)
+ EVENTHANDLER_DEREGISTER(shutdown_final, sc->ipmi_power_cycle_tag);
/* XXX: should use shutdown callout I think. */
/* If the backend uses a kthread, shut it down. */
Modified: head/sys/dev/ipmi/ipmivars.h
==============================================================================
--- head/sys/dev/ipmi/ipmivars.h Wed Oct 25 15:30:48 2017 (r324989)
+++ head/sys/dev/ipmi/ipmivars.h Wed Oct 25 15:30:53 2017 (r324990)
@@ -103,9 +103,11 @@ struct ipmi_softc {
void *ipmi_irq;
int ipmi_detaching;
int ipmi_opened;
+ uint8_t ipmi_dev_support; /* IPMI_ADS_* */
struct cdev *ipmi_cdev;
TAILQ_HEAD(,ipmi_request) ipmi_pending_requests;
int ipmi_driver_requests_polled;
+ eventhandler_tag ipmi_power_cycle_tag;
eventhandler_tag ipmi_watchdog_tag;
int ipmi_watchdog_active;
struct intr_config_hook ipmi_ich;
Modified: head/sys/sys/ipmi.h
==============================================================================
--- head/sys/sys/ipmi.h Wed Oct 25 15:30:48 2017 (r324989)
+++ head/sys/sys/ipmi.h Wed Oct 25 15:30:53 2017 (r324990)
@@ -56,8 +56,25 @@
#define IPMI_ASYNC_EVENT_RECV_TYPE 2
#define IPMI_CMD_RECV_TYPE 3
+#define IPMI_CHASSIS_REQUEST 0x00
+# define IPMI_CHASSIS_CONTROL 0x02
+# define IPMI_CC_POWER_DOWN 0x0
+# define IPMI_CC_POWER_UP 0x1
+# define IPMI_CC_POWER_CYCLE 0x2
+# define IPMI_CC_HARD_RESET 0x3
+# define IPMI_CC_PULSE_DI 0x4
+# define IPMI_CC_SOFT_OVERTEMP 0x5
+
#define IPMI_APP_REQUEST 0x06
#define IPMI_GET_DEVICE_ID 0x01
+# define IPMI_ADS_CHASSIS 0x80
+# define IPMI_ADS_BRIDGE 0x40
+# define IPMI_ADS_EVENT_GEN 0x20
+# define IPMI_ADS_EVENT_RCV 0x10
+# define IPMI_ADS_FRU_INV 0x08
+# define IPMI_ADS_SEL 0x04
+# define IPMI_ADS_SDR 0x02
+# define IPMI_ADS_SENSOR 0x01
#define IPMI_CLEAR_FLAGS 0x30
#define IPMI_GET_MSG_FLAGS 0x31
# define IPMI_MSG_AVAILABLE 0x01
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