litmus-rt.git - The LITMUS^RT kernel.

The LITMUS^RT kernel.

Bjoern Brandenburg

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author	Linus Torvalds <torvalds@linux-foundation.org>	2010-08-15 14:17:52 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2010-08-15 14:17:52 -0400
commit	5a4179460cb50d939a2ae713cf88fcbff75f2c1c (patch)
tree	f41bfc36bbb14be449aaeecf01df592a5fd553f4 /lib/fault-inject.c
parent	5d7cb157025b3b4852f38e6e5e97d06ef12c1d78 (diff)
parent	4725fd3ce970c27a1678fb0809bfc7c2f4ac3e4f (diff)

Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6

* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6: intel_idle: recognize Lincroft Atom Processor intel_idle: no longer EXPERIMENTAL intel_idle: disable module support intel_idle: add support for Westmere-EX intel_idle: delete power_policy modparam, and choose substate functions intel_idle: delete substates DEBUG modparam

Diffstat (limited to 'lib/fault-inject.c')

0 files changed, 0 insertions, 0 deletions

osoft.com> 2011-04-29 16:45:15 -0400 committer Greg Kroah-Hartman <gregkh@suse.de> 2011-05-03 16:31:31 -0400 Staging: hv: VMBUS is a acpi enumerated device; get irq value from bios' href='/cgit/cgit.cgi/litmus-rt-tegra.git/commit/drivers/staging/hv/vmbus_drv.c?id=b0069f43fc6bc9c91f7133922ceb4e08373ff675'>b0069f43fc6

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/*
 * Copyright (c) 2009, Microsoft Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * 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., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 * Authors:
 *   Haiyang Zhang <haiyangz@microsoft.com>
 *   Hank Janssen  <hjanssen@microsoft.com>
 *   K. Y. Srinivasan <kys@microsoft.com>
 *
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/sysctl.h>
#include <linux/pci.h>
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <linux/completion.h>

#include "hyperv.h"
#include "hyperv_vmbus.h"


static struct acpi_device  *hv_acpi_dev;

static struct tasklet_struct msg_dpc;
static struct tasklet_struct event_dpc;

unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
EXPORT_SYMBOL(vmbus_loglevel);
	/* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */
	/* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */

static struct completion probe_event;
static int irq;

static void get_channel_info(struct hv_device *device,
			     struct hv_device_info *info)
{
	struct vmbus_channel_debug_info debug_info;

	if (!device->channel)
		return;

	vmbus_get_debug_info(device->channel, &debug_info);

	info->chn_id = debug_info.relid;
	info->chn_state = debug_info.state;
	memcpy(&info->chn_type, &debug_info.interfacetype,
	       sizeof(struct hv_guid));
	memcpy(&info->chn_instance, &debug_info.interface_instance,
	       sizeof(struct hv_guid));

	info->monitor_id = debug_info.monitorid;

	info->server_monitor_pending = debug_info.servermonitor_pending;
	info->server_monitor_latency = debug_info.servermonitor_latency;
	info->server_monitor_conn_id = debug_info.servermonitor_connectionid;

	info->client_monitor_pending = debug_info.clientmonitor_pending;
	info->client_monitor_latency = debug_info.clientmonitor_latency;
	info->client_monitor_conn_id = debug_info.clientmonitor_connectionid;

	info->inbound.int_mask = debug_info.inbound.current_interrupt_mask;
	info->inbound.read_idx = debug_info.inbound.current_read_index;
	info->inbound.write_idx = debug_info.inbound.current_write_index;
	info->inbound.bytes_avail_toread =
		debug_info.inbound.bytes_avail_toread;
	info->inbound.bytes_avail_towrite =
		debug_info.inbound.bytes_avail_towrite;

	info->outbound.int_mask =
		debug_info.outbound.current_interrupt_mask;
	info->outbound.read_idx = debug_info.outbound.current_read_index;
	info->outbound.write_idx = debug_info.outbound.current_write_index;
	info->outbound.bytes_avail_toread =
		debug_info.outbound.bytes_avail_toread;
	info->outbound.bytes_avail_towrite =
		debug_info.outbound.bytes_avail_towrite;
}

/*
 * vmbus_show_device_attr - Show the device attribute in sysfs.
 *
 * This is invoked when user does a
 * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>"
 */
static ssize_t vmbus_show_device_attr(struct device *dev,
				      struct device_attribute *dev_attr,
				      char *buf)
{
	struct hv_device *hv_dev = device_to_hv_device(dev);
	struct hv_device_info device_info;

	memset(&device_info, 0, sizeof(struct hv_device_info));

	get_channel_info(hv_dev, &device_info);

	if (!strcmp(dev_attr->attr.name, "class_id")) {
		return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
			       "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
			       device_info.chn_type.data[3],
			       device_info.chn_type.data[2],
			       device_info.chn_type.data[1],
			       device_info.chn_type.data[0],
			       device_info.chn_type.data[5],
			       device_info.chn_type.data[4],
			       device_info.chn_type.data[7],
			       device_info.chn_type.data[6],
			       device_info.chn_type.data[8],
			       device_info.chn_type.data[9],
			       device_info.chn_type.data[10],
			       device_info.chn_type.data[11],
			       device_info.chn_type.data[12],
			       device_info.chn_type.data[13],
			       device_info.chn_type.data[14],
			       device_info.chn_type.data[15]);
	} else if (!strcmp(dev_attr->attr.name, "device_id")) {
		return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
			       "%02x%02x%02x%02x%02x%02x%02x%02x}\n",
			       device_info.chn_instance.data[3],
			       device_info.chn_instance.data[2],
			       device_info.chn_instance.data[1],
			       device_info.chn_instance.data[0],
			       device_info.chn_instance.data[5],
			       device_info.chn_instance.data[4],
			       device_info.chn_instance.data[7],
			       device_info.chn_instance.data[6],
			       device_info.chn_instance.data[8],
			       device_info.chn_instance.data[9],
			       device_info.chn_instance.data[10],
			       device_info.chn_instance.data[11],
			       device_info.chn_instance.data[12],
			       device_info.chn_instance.data[13],
			       device_info.chn_instance.data[14],
			       device_info.chn_instance.data[15]);
	} else if (!strcmp(dev_attr->attr.name, "state")) {
		return sprintf(buf, "%d\n", device_info.chn_state);
	} else if (!strcmp(dev_attr->attr.name, "id")) {
		return sprintf(buf, "%d\n", device_info.chn_id);
	} else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) {
		return sprintf(buf, "%d\n", device_info.outbound.int_mask);
	} else if (!strcmp(dev_attr->attr.name, "out_read_index")) {
		return sprintf(buf, "%d\n", device_info.outbound.read_idx);
	} else if (!strcmp(dev_attr->attr.name, "out_write_index")) {
		return sprintf(buf, "%d\n", device_info.outbound.write_idx);
	} else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) {
		return sprintf(buf, "%d\n",
			       device_info.outbound.bytes_avail_toread);
	} else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) {
		return sprintf(buf, "%d\n",
			       device_info.outbound.bytes_avail_towrite);
	} else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) {
		return sprintf(buf, "%d\n", device_info.inbound.int_mask);
	} else if (!strcmp(dev_attr->attr.name, "in_read_index")) {
		return sprintf(buf, "%d\n", device_info.inbound.read_idx);
	} else if (!strcmp(dev_attr->attr.name, "in_write_index")) {
		return sprintf(buf, "%d\n", device_info.inbound.write_idx);
	} else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) {
		return sprintf(buf, "%d\n",
			       device_info.inbound.bytes_avail_toread);
	} else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) {
		return sprintf(buf, "%d\n",
			       device_info.inbound.bytes_avail_towrite);
	} else if (!strcmp(dev_attr->attr.name, "monitor_id")) {
		return sprintf(buf, "%d\n", device_info.monitor_id);
	} else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) {
		return sprintf(buf, "%d\n", device_info.server_monitor_pending);
	} else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) {
		return sprintf(buf, "%d\n", device_info.server_monitor_latency);
	} else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) {
		return sprintf(buf, "%d\n",
			       device_info.server_monitor_conn_id);
	} else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) {
		return sprintf(buf, "%d\n", device_info.client_monitor_pending);
	} else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) {
		return sprintf(buf, "%d\n", device_info.client_monitor_latency);
	} else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) {
		return sprintf(buf, "%d\n",
			       device_info.client_monitor_conn_id);
	} else {
		return 0;
	}
}

/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
static struct device_attribute vmbus_device_attrs[] = {
	__ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),

	__ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),

	__ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),

	__ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),

	__ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
	__ATTR_NULL
};


/*
 * vmbus_uevent - add uevent for our device
 *
 * This routine is invoked when a device is added or removed on the vmbus to
 * generate a uevent to udev in the userspace. The udev will then look at its
 * rule and the uevent generated here to load the appropriate driver
 */
static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
{
	struct hv_device *dev = device_to_hv_device(device);
	int ret;

	ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={"
			     "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
			     "%02x%02x%02x%02x%02x%02x%02x%02x}",
			     dev->dev_type.data[3],
			     dev->dev_type.data[2],
			     dev->dev_type.data[1],
			     dev->dev_type.data[0],
			     dev->dev_type.data[5],
			     dev->dev_type.data[4],
			     dev->dev_type.data[7],
			     dev->dev_type.data[6],
			     dev->dev_type.data[8],
			     dev->dev_type.data[9],
			     dev->dev_type.data[10],
			     dev->dev_type.data[11],
			     dev->dev_type.data[12],
			     dev->dev_type.data[13],
			     dev->dev_type.data[14],
			     dev->dev_type.data[15]);

	if (ret)
		return ret;

	ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
			     "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
			     "%02x%02x%02x%02x%02x%02x%02x%02x}",
			     dev->dev_instance.data[3],
			     dev->dev_instance.data[2],
			     dev->dev_instance.data[1],
			     dev->dev_instance.data[0],
			     dev->dev_instance.data[5],
			     dev->dev_instance.data[4],
			     dev->dev_instance.data[7],
			     dev->dev_instance.data[6],
			     dev->dev_instance.data[8],
			     dev->dev_instance.data[9],
			     dev->dev_instance.data[10],
			     dev->dev_instance.data[11],
			     dev->dev_instance.data[12],
			     dev->dev_instance.data[13],
			     dev->dev_instance.data[14],
			     dev->dev_instance.data[15]);
	if (ret)
		return ret;

	return 0;
}


/*
 * vmbus_match - Attempt to match the specified device to the specified driver
 */
static int vmbus_match(struct device *device, struct device_driver *driver)
{
	int match = 0;
	struct hv_driver *drv = drv_to_hv_drv(driver);
	struct hv_device *hv_dev = device_to_hv_device(device);

	/* We found our driver ? */
	if (memcmp(&hv_dev->dev_type, &drv->dev_type,
		   sizeof(struct hv_guid)) == 0)
		match = 1;

	return match;
}

/*
 * vmbus_probe - Add the new vmbus's child device
 */
static int vmbus_probe(struct device *child_device)
{
	int ret = 0;
	struct hv_driver *drv =
			drv_to_hv_drv(child_device->driver);
	struct hv_device *dev = device_to_hv_device(child_device);

	if (drv->probe) {
		ret = drv->probe(dev);
		if (ret != 0)
			pr_err("probe failed for device %s (%d)\n",
			       dev_name(child_device), ret);

	} else {
		pr_err("probe not set for driver %s\n",
		       dev_name(child_device));
		ret = -ENODEV;
	}
	return ret;
}

/*
 * vmbus_remove - Remove a vmbus device
 */
static int vmbus_remove(struct device *child_device)
{
	int ret;
	struct hv_driver *drv;

	struct hv_device *dev = device_to_hv_device(child_device);

	if (child_device->driver) {
		drv = drv_to_hv_drv(child_device->driver);

		if (drv->remove) {
			ret = drv->remove(dev);
		} else {
			pr_err("remove not set for driver %s\n",
				dev_name(child_device));
			ret = -ENODEV;
		}
	}

	return 0;
}


/*
 * vmbus_shutdown - Shutdown a vmbus device
 */
static void vmbus_shutdown(struct device *child_device)
{
	struct hv_driver *drv;
	struct hv_device *dev = device_to_hv_device(child_device);


	/* The device may not be attached yet */
	if (!child_device->driver)
		return;

	drv = drv_to_hv_drv(child_device->driver);

	if (drv->shutdown)
		drv->shutdown(dev);

	return;
}


/*
 * vmbus_device_release - Final callback release of the vmbus child device
 */
static void vmbus_device_release(struct device *device)
{
	struct hv_device *hv_dev = device_to_hv_device(device);

	kfree(hv_dev);

}

/* The one and only one */
static struct bus_type  hv_bus = {
	.name =		"vmbus",
	.match =		vmbus_match,
	.shutdown =		vmbus_shutdown,
	.remove =		vmbus_remove,
	.probe =		vmbus_probe,
	.uevent =		vmbus_uevent,
	.dev_attrs =	vmbus_device_attrs,
};

static const char *driver_name = "hyperv";


struct onmessage_work_context {
	struct work_struct work;
	struct hv_message msg;
};

static void vmbus_onmessage_work(struct work_struct *work)
{
	struct onmessage_work_context *ctx;

	ctx = container_of(work, struct onmessage_work_context,
			   work);
	vmbus_onmessage(&ctx->msg);
	kfree(ctx);
}

/*
 * vmbus_on_msg_dpc - DPC routine to handle messages from the hypervisior
 */
static void vmbus_on_msg_dpc(unsigned long data)
{
	int cpu = smp_processor_id();
	void *page_addr = hv_context.synic_message_page[cpu];
	struct hv_message *msg = (struct hv_message *)page_addr +
				  VMBUS_MESSAGE_SINT;
	struct onmessage_work_context *ctx;


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