645954c542
Move it out of the include subdirectory. No code changes here, just file movements. Cc: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1131 lines
31 KiB
C
1131 lines
31 KiB
C
/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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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 and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/sysctl.h>
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#include "osd.h"
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#include "logging.h"
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#include "vmbus.h"
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/* Defines */
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/* FIXME! We need to do this dynamically for PIC and APIC system */
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#define VMBUS_IRQ 0x5
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#define VMBUS_IRQ_VECTOR IRQ5_VECTOR
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/* Data types */
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/* Main vmbus driver data structure */
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struct vmbus_driver_context {
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/* !! These must be the first 2 fields !! */
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/* The driver field is not used in here. Instead, the bus field is */
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/* used to represent the driver */
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struct driver_context drv_ctx;
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struct vmbus_driver drv_obj;
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struct bus_type bus;
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struct tasklet_struct msg_dpc;
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struct tasklet_struct event_dpc;
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/* The bus root device */
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struct device_context device_ctx;
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};
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/* Static decl */
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static int vmbus_match(struct device *device, struct device_driver *driver);
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static int vmbus_probe(struct device *device);
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static int vmbus_remove(struct device *device);
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static void vmbus_shutdown(struct device *device);
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static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env);
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static void vmbus_msg_dpc(unsigned long data);
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static void vmbus_event_dpc(unsigned long data);
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static irqreturn_t vmbus_isr(int irq, void* dev_id);
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static void vmbus_device_release(struct device *device);
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static void vmbus_bus_release(struct device *device);
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static struct hv_device *vmbus_child_device_create(struct hv_guid *type, struct hv_guid *instance, void *context);
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static void vmbus_child_device_destroy(struct hv_device *device_obj);
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static int vmbus_child_device_register(struct hv_device *root_device_obj, struct hv_device *child_device_obj);
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static void vmbus_child_device_unregister(struct hv_device *child_device_obj);
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static void vmbus_child_device_get_info(struct hv_device *device_obj, struct hv_device_info *device_info);
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/* static ssize_t vmbus_show_class_id(struct device *dev, struct device_attribute *attr, char *buf); */
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/* static ssize_t vmbus_show_device_id(struct device *dev, struct device_attribute *attr, char *buf); */
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static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribute *dev_attr, char *buf);
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/* Global */
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/* Global logging setting */
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/* unsigned int vmbus_loglevel= (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */
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/* unsigned int vmbus_loglevel= (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */
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unsigned int vmbus_loglevel= (ALL_MODULES << 16 | INFO_LVL);
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EXPORT_SYMBOL(vmbus_loglevel);
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static int vmbus_irq = VMBUS_IRQ;
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/* Setup /proc/sys/bus/vmbus/vmbus_loglevel */
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/* Allow usage of sysctl cmd to set the logging level */
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/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
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static struct device_attribute vmbus_device_attrs[] = {
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__ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL),
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__ATTR_NULL
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};
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/* The one and only one */
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static struct vmbus_driver_context g_vmbus_drv={
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.bus.name = "vmbus",
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.bus.match = vmbus_match,
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.bus.shutdown = vmbus_shutdown,
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.bus.remove = vmbus_remove,
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.bus.probe = vmbus_probe,
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.bus.uevent = vmbus_uevent,
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.bus.dev_attrs = vmbus_device_attrs,
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};
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/* Routines */
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/*++
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Name: vmbus_show_device_attr()
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Desc: Show the device attribute in sysfs. This is invoked when user does a "cat /sys/bus/vmbus/devices/<bus device>/<attr name>"
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--*/
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static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribute *dev_attr, char *buf)
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{
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struct device_context *device_ctx = device_to_device_context(dev);
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struct hv_device_info device_info;
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memset(&device_info, 0, sizeof(struct hv_device_info));
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vmbus_child_device_get_info(&device_ctx->device_obj, &device_info);
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if (!strcmp(dev_attr->attr.name, "class_id"))
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{
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return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n",
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device_info.ChannelType.data[3], device_info.ChannelType.data[2],
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device_info.ChannelType.data[1], device_info.ChannelType.data[0],
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device_info.ChannelType.data[5], device_info.ChannelType.data[4],
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device_info.ChannelType.data[7], device_info.ChannelType.data[6],
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device_info.ChannelType.data[8], device_info.ChannelType.data[9],
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device_info.ChannelType.data[10], device_info.ChannelType.data[11],
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device_info.ChannelType.data[12], device_info.ChannelType.data[13],
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device_info.ChannelType.data[14], device_info.ChannelType.data[15]);
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}
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else if (!strcmp(dev_attr->attr.name, "device_id"))
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{
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return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n",
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device_info.ChannelInstance.data[3], device_info.ChannelInstance.data[2],
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device_info.ChannelInstance.data[1], device_info.ChannelInstance.data[0],
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device_info.ChannelInstance.data[5], device_info.ChannelInstance.data[4],
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device_info.ChannelInstance.data[7], device_info.ChannelInstance.data[6],
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device_info.ChannelInstance.data[8], device_info.ChannelInstance.data[9],
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device_info.ChannelInstance.data[10], device_info.ChannelInstance.data[11],
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device_info.ChannelInstance.data[12], device_info.ChannelInstance.data[13],
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device_info.ChannelInstance.data[14], device_info.ChannelInstance.data[15]);
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}
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else if (!strcmp(dev_attr->attr.name, "state"))
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{
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return sprintf(buf, "%d\n", device_info.ChannelState);
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}
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else if (!strcmp(dev_attr->attr.name, "id"))
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{
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return sprintf(buf, "%d\n", device_info.ChannelId);
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}
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else if (!strcmp(dev_attr->attr.name, "out_intr_mask"))
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{
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return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask);
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}
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else if (!strcmp(dev_attr->attr.name, "out_read_index"))
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{
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return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex);
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}
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else if (!strcmp(dev_attr->attr.name, "out_write_index"))
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{
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return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex);
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}
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else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail"))
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{
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return sprintf(buf, "%d\n", device_info.Outbound.BytesAvailToRead);
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}
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else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail"))
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{
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return sprintf(buf, "%d\n", device_info.Outbound.BytesAvailToWrite);
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}
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else if (!strcmp(dev_attr->attr.name, "in_intr_mask"))
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{
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return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask);
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}
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else if (!strcmp(dev_attr->attr.name, "in_read_index"))
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{
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return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex);
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}
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else if (!strcmp(dev_attr->attr.name, "in_write_index"))
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{
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return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex);
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}
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else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail"))
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{
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return sprintf(buf, "%d\n", device_info.Inbound.BytesAvailToRead);
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}
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else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail"))
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{
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return sprintf(buf, "%d\n", device_info.Inbound.BytesAvailToWrite);
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}
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else if (!strcmp(dev_attr->attr.name, "monitor_id"))
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{
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return sprintf(buf, "%d\n", device_info.MonitorId);
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}
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else if (!strcmp(dev_attr->attr.name, "server_monitor_pending"))
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{
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return sprintf(buf, "%d\n", device_info.ServerMonitorPending);
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}
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else if (!strcmp(dev_attr->attr.name, "server_monitor_latency"))
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{
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return sprintf(buf, "%d\n", device_info.ServerMonitorLatency);
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}
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else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id"))
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{
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return sprintf(buf, "%d\n", device_info.ServerMonitorConnectionId);
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}
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else if (!strcmp(dev_attr->attr.name, "client_monitor_pending"))
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{
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return sprintf(buf, "%d\n", device_info.ClientMonitorPending);
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}
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else if (!strcmp(dev_attr->attr.name, "client_monitor_latency"))
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{
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return sprintf(buf, "%d\n", device_info.ClientMonitorLatency);
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}
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else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id"))
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{
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return sprintf(buf, "%d\n", device_info.ClientMonitorConnectionId);
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}
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else
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{
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return 0;
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}
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}
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/*++
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Name: vmbus_show_class_id()
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Desc: Show the device class id in sysfs
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--*/
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/* static ssize_t vmbus_show_class_id(struct device *dev, struct device_attribute *attr, char *buf) */
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/* { */
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/* struct device_context *device_ctx = device_to_device_context(dev); */
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/* return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", */
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/* device_ctx->class_id[3], device_ctx->class_id[2], device_ctx->class_id[1], device_ctx->class_id[0], */
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/* device_ctx->class_id[5], device_ctx->class_id[4], */
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/* device_ctx->class_id[7], device_ctx->class_id[6], */
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/* device_ctx->class_id[8], device_ctx->class_id[9], device_ctx->class_id[10], device_ctx->class_id[11], device_ctx->class_id[12], device_ctx->class_id[13], device_ctx->class_id[14], device_ctx->class_id[15]); */
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/* } */
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/*++
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Name: vmbus_show_device_id()
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Desc: Show the device instance id in sysfs
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--*/
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/* static ssize_t vmbus_show_device_id(struct device *dev, struct device_attribute *attr, char *buf) */
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/* { */
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/* struct device_context *device_ctx = device_to_device_context(dev); */
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/* return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", */
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/* device_ctx->device_id[3], device_ctx->device_id[2], device_ctx->device_id[1], device_ctx->device_id[0], */
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/* device_ctx->device_id[5], device_ctx->device_id[4], */
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/* device_ctx->device_id[7], device_ctx->device_id[6], */
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/* device_ctx->device_id[8], device_ctx->device_id[9], device_ctx->device_id[10], device_ctx->device_id[11], device_ctx->device_id[12], device_ctx->device_id[13], device_ctx->device_id[14], device_ctx->device_id[15]); */
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/* } */
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/*++
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Name: vmbus_bus_init()
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Desc: Main vmbus driver initialization routine. Here, we
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- initialize the vmbus driver context
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- setup various driver entry points
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- invoke the vmbus hv main init routine
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- get the irq resource
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- invoke the vmbus to add the vmbus root device
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- setup the vmbus root device
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- retrieve the channel offers
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--*/
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static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init)
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{
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int ret=0;
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unsigned int vector=0;
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struct vmbus_driver_context *vmbus_drv_ctx=&g_vmbus_drv;
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struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
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struct device_context *dev_ctx=&g_vmbus_drv.device_ctx;
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DPRINT_ENTER(VMBUS_DRV);
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/* Set this up to allow lower layer to callback to add/remove child devices on the bus */
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vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create;
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vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy;
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vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register;
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vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister;
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/* Call to bus driver to initialize */
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ret = pfn_drv_init(&vmbus_drv_obj->Base);
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if (ret != 0)
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{
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DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret);
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goto cleanup;
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}
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/* Sanity checks */
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if (!vmbus_drv_obj->Base.OnDeviceAdd)
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{
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DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set");
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ret = -1;
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goto cleanup;
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}
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vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name;
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/* Initialize the bus context */
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tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, (unsigned long)vmbus_drv_obj);
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tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, (unsigned long)vmbus_drv_obj);
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/* Now, register the bus driver with LDM */
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ret = bus_register(&vmbus_drv_ctx->bus);
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if (ret)
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{
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ret = -1;
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goto cleanup;
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}
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|
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/* Get the interrupt resource */
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ret = request_irq(vmbus_irq,
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vmbus_isr,
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IRQF_SAMPLE_RANDOM,
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vmbus_drv_obj->Base.name,
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NULL);
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if (ret != 0)
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{
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DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", vmbus_irq);
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bus_unregister(&vmbus_drv_ctx->bus);
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ret = -1;
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goto cleanup;
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}
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vector = VMBUS_IRQ_VECTOR;
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DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector);
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/* Call to bus driver to add the root device */
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memset(dev_ctx, 0, sizeof(struct device_context));
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ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector);
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if (ret != 0)
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{
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DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to add vmbus root device");
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free_irq(vmbus_irq, NULL);
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bus_unregister(&vmbus_drv_ctx->bus);
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ret = -1;
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goto cleanup;
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}
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/* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */
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dev_set_name(&dev_ctx->device, "vmbus_0_0");
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memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, sizeof(struct hv_guid));
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memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, sizeof(struct hv_guid));
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/* No need to bind a driver to the root device. */
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dev_ctx->device.parent = NULL;
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dev_ctx->device.bus = &vmbus_drv_ctx->bus; /* NULL; vmbus_remove() does not get invoked */
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|
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/* Setup the device dispatch table */
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dev_ctx->device.release = vmbus_bus_release;
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/* Setup the bus as root device */
|
|
ret = device_register(&dev_ctx->device);
|
|
if (ret)
|
|
{
|
|
DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to register vmbus root device");
|
|
|
|
free_irq(vmbus_irq, NULL);
|
|
bus_unregister(&vmbus_drv_ctx->bus);
|
|
|
|
ret = -1;
|
|
goto cleanup;
|
|
}
|
|
|
|
|
|
vmbus_drv_obj->GetChannelOffers();
|
|
|
|
cleanup:
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_bus_exit()
|
|
|
|
Desc: Terminate the vmbus driver. This routine is opposite of vmbus_bus_init()
|
|
|
|
--*/
|
|
static void vmbus_bus_exit(void)
|
|
{
|
|
struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
|
|
struct vmbus_driver_context *vmbus_drv_ctx=&g_vmbus_drv;
|
|
|
|
struct device_context *dev_ctx=&g_vmbus_drv.device_ctx;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* Remove the root device */
|
|
if (vmbus_drv_obj->Base.OnDeviceRemove)
|
|
vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj);
|
|
|
|
if (vmbus_drv_obj->Base.OnCleanup)
|
|
vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base);
|
|
|
|
/* Unregister the root bus device */
|
|
device_unregister(&dev_ctx->device);
|
|
|
|
bus_unregister(&vmbus_drv_ctx->bus);
|
|
|
|
free_irq(vmbus_irq, NULL);
|
|
|
|
tasklet_kill(&vmbus_drv_ctx->msg_dpc);
|
|
tasklet_kill(&vmbus_drv_ctx->event_dpc);
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_driver_register()
|
|
|
|
Desc: Register a vmbus's child driver
|
|
|
|
--*/
|
|
int vmbus_child_driver_register(struct driver_context* driver_ctx)
|
|
{
|
|
struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
|
|
int ret;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", driver_ctx, driver_ctx->driver.name);
|
|
|
|
/* The child driver on this vmbus */
|
|
driver_ctx->driver.bus = &g_vmbus_drv.bus;
|
|
|
|
ret = driver_register(&driver_ctx->driver);
|
|
|
|
vmbus_drv_obj->GetChannelOffers();
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(vmbus_child_driver_register);
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_driver_unregister()
|
|
|
|
Desc: Unregister a vmbus's child driver
|
|
|
|
--*/
|
|
void vmbus_child_driver_unregister(struct driver_context* driver_ctx)
|
|
{
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", driver_ctx, driver_ctx->driver.name);
|
|
|
|
driver_unregister(&driver_ctx->driver);
|
|
|
|
driver_ctx->driver.bus = NULL;
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
EXPORT_SYMBOL(vmbus_child_driver_unregister);
|
|
|
|
/*++
|
|
|
|
Name: vmbus_get_interface()
|
|
|
|
Desc: Get the vmbus channel interface. This is invoked by child/client driver that sits
|
|
above vmbus
|
|
--*/
|
|
void vmbus_get_interface(struct vmbus_channel_interface *interface)
|
|
{
|
|
struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
|
|
|
|
vmbus_drv_obj->GetChannelInterface(interface);
|
|
}
|
|
|
|
EXPORT_SYMBOL(vmbus_get_interface);
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_device_get_info()
|
|
|
|
Desc: Get the vmbus child device info. This is invoked to display various device attributes in sysfs.
|
|
--*/
|
|
static void vmbus_child_device_get_info(struct hv_device *device_obj, struct hv_device_info *device_info)
|
|
{
|
|
struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj;
|
|
|
|
vmbus_drv_obj->GetChannelInfo(device_obj, device_info);
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_device_create()
|
|
|
|
Desc: Creates and registers a new child device on the vmbus.
|
|
|
|
--*/
|
|
static struct hv_device *vmbus_child_device_create(struct hv_guid *type,
|
|
struct hv_guid *instance,
|
|
void *context)
|
|
{
|
|
struct device_context *child_device_ctx;
|
|
struct hv_device *child_device_obj;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* Allocate the new child device */
|
|
child_device_ctx = kzalloc(sizeof(struct device_context), GFP_KERNEL);
|
|
if (!child_device_ctx)
|
|
{
|
|
DPRINT_ERR(VMBUS_DRV, "unable to allocate device_context for child device");
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - "
|
|
"type {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x},"
|
|
"id {%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}",
|
|
&child_device_ctx->device,
|
|
type->data[3], type->data[2], type->data[1], type->data[0],
|
|
type->data[5], type->data[4], type->data[7], type->data[6],
|
|
type->data[8], type->data[9], type->data[10], type->data[11],
|
|
type->data[12], type->data[13], type->data[14], type->data[15],
|
|
instance->data[3], instance->data[2], instance->data[1], instance->data[0],
|
|
instance->data[5], instance->data[4], instance->data[7], instance->data[6],
|
|
instance->data[8], instance->data[9], instance->data[10], instance->data[11],
|
|
instance->data[12], instance->data[13], instance->data[14], instance->data[15]);
|
|
|
|
child_device_obj = &child_device_ctx->device_obj;
|
|
child_device_obj->context = context;
|
|
memcpy(&child_device_obj->deviceType, &type, sizeof(struct hv_guid));
|
|
memcpy(&child_device_obj->deviceInstance, &instance, sizeof(struct hv_guid));
|
|
|
|
memcpy(&child_device_ctx->class_id, &type, sizeof(struct hv_guid));
|
|
memcpy(&child_device_ctx->device_id, &instance, sizeof(struct hv_guid));
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return child_device_obj;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_device_register()
|
|
|
|
Desc: Register the child device on the specified bus
|
|
|
|
--*/
|
|
static int vmbus_child_device_register(struct hv_device *root_device_obj, struct hv_device *child_device_obj)
|
|
{
|
|
int ret=0;
|
|
struct device_context *root_device_ctx = to_device_context(root_device_obj);
|
|
struct device_context *child_device_ctx = to_device_context(child_device_obj);
|
|
static atomic_t device_num = ATOMIC_INIT(0);
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", child_device_ctx);
|
|
|
|
/* Make sure we are not registered already */
|
|
|
|
if (strlen(dev_name(&child_device_ctx->device)) != 0)
|
|
{
|
|
DPRINT_ERR(VMBUS_DRV, "child device (%p) already registered - busid %s", child_device_ctx, dev_name(&child_device_ctx->device));
|
|
|
|
ret = -1;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Set the device bus id. Otherwise, device_register()will fail. */
|
|
dev_set_name(&child_device_ctx->device, "vmbus_0_%d", atomic_inc_return(&device_num));
|
|
|
|
/* The new device belongs to this bus */
|
|
child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */
|
|
child_device_ctx->device.parent = &root_device_ctx->device;
|
|
child_device_ctx->device.release = vmbus_device_release;
|
|
|
|
/* Register with the LDM. This will kick off the driver/device binding...which will */
|
|
/* eventually call vmbus_match() and vmbus_probe() */
|
|
ret = device_register(&child_device_ctx->device);
|
|
|
|
/* vmbus_probe() error does not get propergate to device_register(). */
|
|
ret = child_device_ctx->probe_error;
|
|
|
|
if (ret)
|
|
DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", &child_device_ctx->device);
|
|
else
|
|
DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", &child_device_ctx->device);
|
|
|
|
Cleanup:
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_device_unregister()
|
|
|
|
Desc: Remove the specified child device from the vmbus.
|
|
|
|
--*/
|
|
static void vmbus_child_device_unregister(struct hv_device *device_obj)
|
|
{
|
|
struct device_context *device_ctx = to_device_context(device_obj);
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", &device_ctx->device);
|
|
|
|
/* Kick off the process of unregistering the device. */
|
|
/* This will call vmbus_remove() and eventually vmbus_device_release() */
|
|
device_unregister(&device_ctx->device);
|
|
|
|
DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", &device_ctx->device);
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_child_device_destroy()
|
|
|
|
Desc: Destroy the specified child device on the vmbus.
|
|
|
|
--*/
|
|
static void vmbus_child_device_destroy(struct hv_device *device_obj)
|
|
{
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_uevent()
|
|
|
|
Desc: 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 device_context *device_ctx = device_to_device_context(device);
|
|
int i=0;
|
|
int len=0;
|
|
int ret;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}",
|
|
device_ctx->class_id.data[3], device_ctx->class_id.data[2],
|
|
device_ctx->class_id.data[1], device_ctx->class_id.data[0],
|
|
device_ctx->class_id.data[5], device_ctx->class_id.data[4],
|
|
device_ctx->class_id.data[7], device_ctx->class_id.data[6],
|
|
device_ctx->class_id.data[8], device_ctx->class_id.data[9],
|
|
device_ctx->class_id.data[10], device_ctx->class_id.data[11],
|
|
device_ctx->class_id.data[12], device_ctx->class_id.data[13],
|
|
device_ctx->class_id.data[14], device_ctx->class_id.data[15]);
|
|
|
|
env->envp_idx = i;
|
|
env->buflen = len;
|
|
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}",
|
|
device_ctx->class_id.data[3], device_ctx->class_id.data[2],
|
|
device_ctx->class_id.data[1], device_ctx->class_id.data[0],
|
|
device_ctx->class_id.data[5], device_ctx->class_id.data[4],
|
|
device_ctx->class_id.data[7], device_ctx->class_id.data[6],
|
|
device_ctx->class_id.data[8], device_ctx->class_id.data[9],
|
|
device_ctx->class_id.data[10], device_ctx->class_id.data[11],
|
|
device_ctx->class_id.data[12], device_ctx->class_id.data[13],
|
|
device_ctx->class_id.data[14], device_ctx->class_id.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}",
|
|
device_ctx->device_id.data[3], device_ctx->device_id.data[2],
|
|
device_ctx->device_id.data[1], device_ctx->device_id.data[0],
|
|
device_ctx->device_id.data[5], device_ctx->device_id.data[4],
|
|
device_ctx->device_id.data[7], device_ctx->device_id.data[6],
|
|
device_ctx->device_id.data[8], device_ctx->device_id.data[9],
|
|
device_ctx->device_id.data[10], device_ctx->device_id.data[11],
|
|
device_ctx->device_id.data[12], device_ctx->device_id.data[13],
|
|
device_ctx->device_id.data[14], device_ctx->device_id.data[15]);
|
|
|
|
if (ret)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
env->envp[env->envp_idx] = NULL;
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_match()
|
|
|
|
Desc: 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 driver_context *driver_ctx = driver_to_driver_context(driver);
|
|
struct device_context *device_ctx = device_to_device_context(device);
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* We found our driver ? */
|
|
if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, sizeof(struct hv_guid)) == 0)
|
|
{
|
|
/* !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast it here to access the */
|
|
/* struct hv_driver field */
|
|
struct vmbus_driver_context *vmbus_drv_ctx = (struct vmbus_driver_context*)driver_ctx;
|
|
device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base;
|
|
DPRINT_INFO(VMBUS_DRV, "device object (%p) set to driver object (%p)", &device_ctx->device_obj, device_ctx->device_obj.Driver);
|
|
|
|
match = 1;
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return match;
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_probe_failed_cb()
|
|
|
|
Desc: Callback when a driver probe failed in vmbus_probe(). We need a callback because
|
|
we cannot invoked device_unregister() inside vmbus_probe() since vmbus_probe() may be
|
|
invoked inside device_register() i.e. we cannot call device_unregister() inside
|
|
device_register()
|
|
--*/
|
|
static void vmbus_probe_failed_cb(struct work_struct *context)
|
|
{
|
|
struct device_context *device_ctx = (struct device_context*)context;
|
|
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* Kick off the process of unregistering the device. */
|
|
/* This will call vmbus_remove() and eventually vmbus_device_release() */
|
|
device_unregister(&device_ctx->device);
|
|
|
|
/* put_device(&device_ctx->device); */
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_probe()
|
|
|
|
Desc: Add the new vmbus's child device
|
|
|
|
--*/
|
|
static int vmbus_probe(struct device *child_device)
|
|
{
|
|
int ret=0;
|
|
struct driver_context *driver_ctx = driver_to_driver_context(child_device->driver);
|
|
struct device_context *device_ctx = device_to_device_context(child_device);
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* Let the specific open-source driver handles the probe if it can */
|
|
if (driver_ctx->probe)
|
|
{
|
|
ret = device_ctx->probe_error = driver_ctx->probe(child_device);
|
|
if (ret != 0)
|
|
{
|
|
DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s (%p) on driver %s (%d)...", dev_name(child_device), child_device, child_device->driver->name, ret);
|
|
|
|
INIT_WORK(&device_ctx->probe_failed_work_item, vmbus_probe_failed_cb);
|
|
schedule_work(&device_ctx->probe_failed_work_item);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", child_device->driver->name);
|
|
ret = -1;
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_remove()
|
|
|
|
Desc: Remove a vmbus device
|
|
|
|
--*/
|
|
static int vmbus_remove(struct device *child_device)
|
|
{
|
|
int ret=0;
|
|
struct driver_context *driver_ctx;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* Special case root bus device */
|
|
if (child_device->parent == NULL)
|
|
{
|
|
/* No-op since it is statically defined and handle in vmbus_bus_exit() */
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return 0;
|
|
}
|
|
|
|
if (child_device->driver)
|
|
{
|
|
driver_ctx = driver_to_driver_context(child_device->driver);
|
|
|
|
/* Let the specific open-source driver handles the removal if it can */
|
|
if (driver_ctx->remove)
|
|
{
|
|
ret = driver_ctx->remove(child_device);
|
|
}
|
|
else
|
|
{
|
|
DPRINT_ERR(VMBUS_DRV, "remove() method not set for driver - %s", child_device->driver->name);
|
|
ret = -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_shutdown()
|
|
|
|
Desc: Shutdown a vmbus device
|
|
|
|
--*/
|
|
static void vmbus_shutdown(struct device *child_device)
|
|
{
|
|
struct driver_context *driver_ctx;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* Special case root bus device */
|
|
if (child_device->parent == NULL)
|
|
{
|
|
/* No-op since it is statically defined and handle in vmbus_bus_exit() */
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return;
|
|
}
|
|
|
|
/* The device may not be attached yet */
|
|
if (!child_device->driver)
|
|
{
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return;
|
|
}
|
|
|
|
driver_ctx = driver_to_driver_context(child_device->driver);
|
|
|
|
/* Let the specific open-source driver handles the removal if it can */
|
|
if (driver_ctx->shutdown)
|
|
{
|
|
driver_ctx->shutdown(child_device);
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_bus_release()
|
|
|
|
Desc: Final callback release of the vmbus root device
|
|
|
|
--*/
|
|
static void vmbus_bus_release(struct device *device)
|
|
{
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_device_release()
|
|
|
|
Desc: Final callback release of the vmbus child device
|
|
|
|
--*/
|
|
static void vmbus_device_release(struct device *device)
|
|
{
|
|
struct device_context *device_ctx = device_to_device_context(device);
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
/* vmbus_child_device_destroy(&device_ctx->device_obj); */
|
|
kfree(device_ctx);
|
|
|
|
/* !!DO NOT REFERENCE device_ctx anymore at this point!! */
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return;
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_msg_dpc()
|
|
|
|
Desc: Tasklet routine to handle hypervisor messages
|
|
|
|
--*/
|
|
static void vmbus_msg_dpc(unsigned long data)
|
|
{
|
|
struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
ASSERT(vmbus_drv_obj->OnMsgDpc != NULL);
|
|
|
|
/* Call to bus driver to handle interrupt */
|
|
vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base);
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_msg_dpc()
|
|
|
|
Desc: Tasklet routine to handle hypervisor events
|
|
|
|
--*/
|
|
static void vmbus_event_dpc(unsigned long data)
|
|
{
|
|
struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
ASSERT(vmbus_drv_obj->OnEventDpc != NULL);
|
|
|
|
/* Call to bus driver to handle interrupt */
|
|
vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base);
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
}
|
|
|
|
/*++
|
|
|
|
Name: vmbus_msg_dpc()
|
|
|
|
Desc: ISR routine
|
|
|
|
--*/
|
|
static irqreturn_t vmbus_isr(int irq, void* dev_id)
|
|
{
|
|
int ret=0;
|
|
struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
ASSERT(vmbus_driver_obj->OnIsr != NULL);
|
|
|
|
/* Call to bus driver to handle interrupt */
|
|
ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base);
|
|
|
|
/* Schedules a dpc if necessary */
|
|
if (ret > 0)
|
|
{
|
|
if (test_bit(0, (unsigned long*)&ret))
|
|
{
|
|
tasklet_schedule(&g_vmbus_drv.msg_dpc);
|
|
}
|
|
|
|
if (test_bit(1, (unsigned long*)&ret))
|
|
{
|
|
tasklet_schedule(&g_vmbus_drv.event_dpc);
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return IRQ_HANDLED;
|
|
}
|
|
else
|
|
{
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return IRQ_NONE;
|
|
}
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_init()
|
|
|
|
Desc: Main vmbus driver entry routine
|
|
|
|
--*/
|
|
static int __init vmbus_init(void)
|
|
{
|
|
int ret=0;
|
|
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
DPRINT_INFO(VMBUS_DRV,
|
|
"Vmbus initializing.... current log level 0x%x (%x,%x)",
|
|
vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel));
|
|
/* Todo: it is used for loglevel, to be ported to new kernel. */
|
|
|
|
ret = vmbus_bus_init(VmbusInitialize);
|
|
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
/*++
|
|
|
|
Name: vmbus_init()
|
|
|
|
Desc: Main vmbus driver exit routine
|
|
|
|
--*/
|
|
static void __exit vmbus_exit(void)
|
|
{
|
|
DPRINT_ENTER(VMBUS_DRV);
|
|
|
|
vmbus_bus_exit();
|
|
/* Todo: it is used for loglevel, to be ported to new kernel. */
|
|
DPRINT_EXIT(VMBUS_DRV);
|
|
|
|
return;
|
|
}
|
|
|
|
module_param(vmbus_irq, int, S_IRUGO);
|
|
module_param(vmbus_loglevel, int, S_IRUGO);
|
|
|
|
module_init(vmbus_init);
|
|
module_exit(vmbus_exit);
|
|
/* eof */
|