diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c index cc81ffd7e8a826d1e5d3bf498141a9c009d69370..b0d2481f5440489e61d849f8510cc7ad31eaf9c1 100644 --- a/drivers/staging/hv/vmbus_drv.c +++ b/drivers/staging/hv/vmbus_drv.c @@ -1,5 +1,4 @@ /* - * * Copyright (c) 2009, Microsoft Corporation. * * This program is free software; you can redistribute it and/or modify it @@ -18,10 +17,7 @@ * Authors: * Haiyang Zhang * Hank Janssen - * */ - - #include #include #include @@ -33,35 +29,27 @@ #include "vmbus.h" -/* Defines */ - - /* FIXME! We need to do this dynamically for PIC and APIC system */ -#define VMBUS_IRQ 0x5 -#define VMBUS_IRQ_VECTOR IRQ5_VECTOR - -/* Data types */ - +#define VMBUS_IRQ 0x5 +#define VMBUS_IRQ_VECTOR IRQ5_VECTOR /* Main vmbus driver data structure */ struct vmbus_driver_context { /* !! These must be the first 2 fields !! */ + /* FIXME, this is a bug */ /* The driver field is not used in here. Instead, the bus field is */ /* used to represent the driver */ - struct driver_context drv_ctx; + struct driver_context drv_ctx; struct vmbus_driver drv_obj; - struct bus_type bus; - struct tasklet_struct msg_dpc; - struct tasklet_struct event_dpc; + struct bus_type bus; + struct tasklet_struct msg_dpc; + struct tasklet_struct event_dpc; /* The bus root device */ - struct device_context device_ctx; + struct device_context device_ctx; }; - -/* Static decl */ - static int vmbus_match(struct device *device, struct device_driver *driver); static int vmbus_probe(struct device *device); static int vmbus_remove(struct device *device); @@ -70,40 +58,33 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); static void vmbus_msg_dpc(unsigned long data); static void vmbus_event_dpc(unsigned long data); -static irqreturn_t vmbus_isr(int irq, void* dev_id); +static irqreturn_t vmbus_isr(int irq, void *dev_id); static void vmbus_device_release(struct device *device); static void vmbus_bus_release(struct device *device); -static struct hv_device *vmbus_child_device_create(struct hv_guid *type, struct hv_guid *instance, void *context); +static struct hv_device *vmbus_child_device_create(struct hv_guid *type, + struct hv_guid *instance, + void *context); static void vmbus_child_device_destroy(struct hv_device *device_obj); -static int vmbus_child_device_register(struct hv_device *root_device_obj, struct hv_device *child_device_obj); +static int vmbus_child_device_register(struct hv_device *root_device_obj, + struct hv_device *child_device_obj); static void vmbus_child_device_unregister(struct hv_device *child_device_obj); -static void vmbus_child_device_get_info(struct hv_device *device_obj, struct hv_device_info *device_info); +static void vmbus_child_device_get_info(struct hv_device *device_obj, + struct hv_device_info *device_info); +static ssize_t vmbus_show_device_attr(struct device *dev, + struct device_attribute *dev_attr, + char *buf); -/* static ssize_t vmbus_show_class_id(struct device *dev, struct device_attribute *attr, char *buf); */ -/* static ssize_t vmbus_show_device_id(struct device *dev, struct device_attribute *attr, char *buf); */ -static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribute *dev_attr, char *buf); - - -/* Global */ - - -/* Global logging setting */ - -/* unsigned int vmbus_loglevel= (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ -/* unsigned int vmbus_loglevel= (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ -unsigned int vmbus_loglevel= (ALL_MODULES << 16 | INFO_LVL); +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 int vmbus_irq = VMBUS_IRQ; -/* Setup /proc/sys/bus/vmbus/vmbus_loglevel */ -/* Allow usage of sysctl cmd to set the logging level */ - /* Set up per device attributes in /sys/bus/vmbus/devices/ */ - 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), @@ -134,29 +115,25 @@ static struct device_attribute vmbus_device_attrs[] = { }; /* The one and only one */ -static struct vmbus_driver_context g_vmbus_drv={ - .bus.name = "vmbus", - .bus.match = vmbus_match, - .bus.shutdown = vmbus_shutdown, - .bus.remove = vmbus_remove, - .bus.probe = vmbus_probe, - .bus.uevent = vmbus_uevent, - .bus.dev_attrs = vmbus_device_attrs, +static struct vmbus_driver_context g_vmbus_drv = { + .bus.name = "vmbus", + .bus.match = vmbus_match, + .bus.shutdown = vmbus_shutdown, + .bus.remove = vmbus_remove, + .bus.probe = vmbus_probe, + .bus.uevent = vmbus_uevent, + .bus.dev_attrs = vmbus_device_attrs, }; - -/* Routines */ - - - -/*++ - -Name: vmbus_show_device_attr() - -Desc: Show the device attribute in sysfs. This is invoked when user does a "cat /sys/bus/vmbus/devices//" - ---*/ -static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribute *dev_attr, char *buf) +/** + * vmbus_show_device_attr - Show the device attribute in sysfs. + * + * This is invoked when user does a + * "cat /sys/bus/vmbus/devices//" + */ +static ssize_t vmbus_show_device_attr(struct device *dev, + struct device_attribute *dev_attr, + char *buf) { struct device_context *device_ctx = device_to_device_context(dev); struct hv_device_info device_info; @@ -165,173 +142,119 @@ static ssize_t vmbus_show_device_attr(struct device *dev, struct device_attribut vmbus_child_device_get_info(&device_ctx->device_obj, &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.ChannelType.data[3], device_info.ChannelType.data[2], - device_info.ChannelType.data[1], device_info.ChannelType.data[0], - device_info.ChannelType.data[5], device_info.ChannelType.data[4], - device_info.ChannelType.data[7], device_info.ChannelType.data[6], - device_info.ChannelType.data[8], device_info.ChannelType.data[9], - device_info.ChannelType.data[10], device_info.ChannelType.data[11], - device_info.ChannelType.data[12], device_info.ChannelType.data[13], - device_info.ChannelType.data[14], device_info.ChannelType.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.ChannelInstance.data[3], device_info.ChannelInstance.data[2], - device_info.ChannelInstance.data[1], device_info.ChannelInstance.data[0], - device_info.ChannelInstance.data[5], device_info.ChannelInstance.data[4], - device_info.ChannelInstance.data[7], device_info.ChannelInstance.data[6], - device_info.ChannelInstance.data[8], device_info.ChannelInstance.data[9], - device_info.ChannelInstance.data[10], device_info.ChannelInstance.data[11], - device_info.ChannelInstance.data[12], device_info.ChannelInstance.data[13], - device_info.ChannelInstance.data[14], device_info.ChannelInstance.data[15]); - } - else if (!strcmp(dev_attr->attr.name, "state")) - { + 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.ChannelType.data[3], + device_info.ChannelType.data[2], + device_info.ChannelType.data[1], + device_info.ChannelType.data[0], + device_info.ChannelType.data[5], + device_info.ChannelType.data[4], + device_info.ChannelType.data[7], + device_info.ChannelType.data[6], + device_info.ChannelType.data[8], + device_info.ChannelType.data[9], + device_info.ChannelType.data[10], + device_info.ChannelType.data[11], + device_info.ChannelType.data[12], + device_info.ChannelType.data[13], + device_info.ChannelType.data[14], + device_info.ChannelType.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.ChannelInstance.data[3], + device_info.ChannelInstance.data[2], + device_info.ChannelInstance.data[1], + device_info.ChannelInstance.data[0], + device_info.ChannelInstance.data[5], + device_info.ChannelInstance.data[4], + device_info.ChannelInstance.data[7], + device_info.ChannelInstance.data[6], + device_info.ChannelInstance.data[8], + device_info.ChannelInstance.data[9], + device_info.ChannelInstance.data[10], + device_info.ChannelInstance.data[11], + device_info.ChannelInstance.data[12], + device_info.ChannelInstance.data[13], + device_info.ChannelInstance.data[14], + device_info.ChannelInstance.data[15]); + } else if (!strcmp(dev_attr->attr.name, "state")) { return sprintf(buf, "%d\n", device_info.ChannelState); - } - else if (!strcmp(dev_attr->attr.name, "id")) - { + } else if (!strcmp(dev_attr->attr.name, "id")) { return sprintf(buf, "%d\n", device_info.ChannelId); - } - else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) - { + } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); - } - else if (!strcmp(dev_attr->attr.name, "out_read_index")) - { + } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); - } - else if (!strcmp(dev_attr->attr.name, "out_write_index")) - { + } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); - } - else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) - { - return sprintf(buf, "%d\n", device_info.Outbound.BytesAvailToRead); - } - else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) - { - return sprintf(buf, "%d\n", device_info.Outbound.BytesAvailToWrite); - } - else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) - { + } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { + return sprintf(buf, "%d\n", + device_info.Outbound.BytesAvailToRead); + } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { + return sprintf(buf, "%d\n", + device_info.Outbound.BytesAvailToWrite); + } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); - } - else if (!strcmp(dev_attr->attr.name, "in_read_index")) - { + } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); - } - else if (!strcmp(dev_attr->attr.name, "in_write_index")) - { + } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); - } - else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) - { - return sprintf(buf, "%d\n", device_info.Inbound.BytesAvailToRead); - } - else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) - { - return sprintf(buf, "%d\n", device_info.Inbound.BytesAvailToWrite); - } - else if (!strcmp(dev_attr->attr.name, "monitor_id")) - { + } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { + return sprintf(buf, "%d\n", + device_info.Inbound.BytesAvailToRead); + } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { + return sprintf(buf, "%d\n", + device_info.Inbound.BytesAvailToWrite); + } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { return sprintf(buf, "%d\n", device_info.MonitorId); - } - else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) - { + } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { return sprintf(buf, "%d\n", device_info.ServerMonitorPending); - } - else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) - { + } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); - } - else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) - { - return sprintf(buf, "%d\n", device_info.ServerMonitorConnectionId); - } - else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) - { + } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { + return sprintf(buf, "%d\n", + device_info.ServerMonitorConnectionId); + } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { return sprintf(buf, "%d\n", device_info.ClientMonitorPending); - } - else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) - { + } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); - } - else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) - { - return sprintf(buf, "%d\n", device_info.ClientMonitorConnectionId); - } - else - { + } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { + return sprintf(buf, "%d\n", + device_info.ClientMonitorConnectionId); + } else { return 0; } } -/*++ - -Name: vmbus_show_class_id() - -Desc: Show the device class id in sysfs - ---*/ -/* static ssize_t vmbus_show_class_id(struct device *dev, struct device_attribute *attr, char *buf) */ -/* { */ -/* struct device_context *device_ctx = device_to_device_context(dev); */ -/* return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", */ -/* device_ctx->class_id[3], device_ctx->class_id[2], device_ctx->class_id[1], device_ctx->class_id[0], */ -/* device_ctx->class_id[5], device_ctx->class_id[4], */ -/* device_ctx->class_id[7], device_ctx->class_id[6], */ -/* 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]); */ -/* } */ - -/*++ - -Name: vmbus_show_device_id() - -Desc: Show the device instance id in sysfs - ---*/ -/* static ssize_t vmbus_show_device_id(struct device *dev, struct device_attribute *attr, char *buf) */ -/* { */ -/* struct device_context *device_ctx = device_to_device_context(dev); */ -/* return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%02x%02x}\n", */ -/* device_ctx->device_id[3], device_ctx->device_id[2], device_ctx->device_id[1], device_ctx->device_id[0], */ -/* device_ctx->device_id[5], device_ctx->device_id[4], */ -/* device_ctx->device_id[7], device_ctx->device_id[6], */ -/* 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]); */ -/* } */ - -/*++ - -Name: vmbus_bus_init() - -Desc: Main vmbus driver initialization routine. Here, we - - initialize the vmbus driver context - - setup various driver entry points - - invoke the vmbus hv main init routine - - get the irq resource - - invoke the vmbus to add the vmbus root device - - setup the vmbus root device - - retrieve the channel offers ---*/ +/** + * vmbus_bus_init -Main vmbus driver initialization routine. + * + * Here, we + * - initialize the vmbus driver context + * - setup various driver entry points + * - invoke the vmbus hv main init routine + * - get the irq resource + * - invoke the vmbus to add the vmbus root device + * - setup the vmbus root device + * - retrieve the channel offers + */ static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) { - int ret=0; - unsigned int vector=0; - - struct vmbus_driver_context *vmbus_drv_ctx=&g_vmbus_drv; + struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; - - struct device_context *dev_ctx=&g_vmbus_drv.device_ctx; + struct device_context *dev_ctx = &g_vmbus_drv.device_ctx; + int ret; + unsigned int vector; DPRINT_ENTER(VMBUS_DRV); - /* Set this up to allow lower layer to callback to add/remove child devices on the bus */ + /* + * Set this up to allow lower layer to callback to add/remove child + * devices on the bus + */ vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; @@ -339,15 +262,13 @@ static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) /* Call to bus driver to initialize */ ret = pfn_drv_init(&vmbus_drv_obj->Base); - if (ret != 0) - { + if (ret != 0) { DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); goto cleanup; } /* Sanity checks */ - if (!vmbus_drv_obj->Base.OnDeviceAdd) - { + if (!vmbus_drv_obj->Base.OnDeviceAdd) { DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); ret = -1; goto cleanup; @@ -356,27 +277,25 @@ static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; /* Initialize the bus context */ - tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, (unsigned long)vmbus_drv_obj); - tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, (unsigned long)vmbus_drv_obj); + tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, + (unsigned long)vmbus_drv_obj); + tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, + (unsigned long)vmbus_drv_obj); /* Now, register the bus driver with LDM */ ret = bus_register(&vmbus_drv_ctx->bus); - if (ret) - { + if (ret) { ret = -1; goto cleanup; } /* Get the interrupt resource */ - ret = request_irq(vmbus_irq, - vmbus_isr, - IRQF_SAMPLE_RANDOM, - vmbus_drv_obj->Base.name, - NULL); + ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, + vmbus_drv_obj->Base.name, NULL); - if (ret != 0) - { - DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", vmbus_irq); + if (ret != 0) { + DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", + vmbus_irq); bus_unregister(&vmbus_drv_ctx->bus); @@ -391,9 +310,9 @@ static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) memset(dev_ctx, 0, sizeof(struct device_context)); ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); - if (ret != 0) - { - DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to add vmbus root device"); + if (ret != 0) { + DPRINT_ERR(VMBUS_DRV, + "ERROR - Unable to add vmbus root device"); free_irq(vmbus_irq, NULL); @@ -404,21 +323,24 @@ static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) } /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ dev_set_name(&dev_ctx->device, "vmbus_0_0"); - memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, sizeof(struct hv_guid)); - memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, sizeof(struct hv_guid)); + memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, + sizeof(struct hv_guid)); + memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, + sizeof(struct hv_guid)); /* No need to bind a driver to the root device. */ dev_ctx->device.parent = NULL; - dev_ctx->device.bus = &vmbus_drv_ctx->bus; /* NULL; vmbus_remove() does not get invoked */ + /* NULL; vmbus_remove() does not get invoked */ + dev_ctx->device.bus = &vmbus_drv_ctx->bus; /* Setup the device dispatch table */ dev_ctx->device.release = vmbus_bus_release; /* 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"); + if (ret) { + DPRINT_ERR(VMBUS_DRV, + "ERROR - Unable to register vmbus root device"); free_irq(vmbus_irq, NULL); bus_unregister(&vmbus_drv_ctx->bus); @@ -436,20 +358,17 @@ static int vmbus_bus_init(PFN_DRIVERINITIALIZE pfn_drv_init) return ret; } - -/*++ - -Name: vmbus_bus_exit() - -Desc: Terminate the vmbus driver. This routine is opposite of vmbus_bus_init() - ---*/ +/** + * vmbus_bus_exit - 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 vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; - struct device_context *dev_ctx=&g_vmbus_drv.device_ctx; + struct device_context *dev_ctx = &g_vmbus_drv.device_ctx; DPRINT_ENTER(VMBUS_DRV); @@ -475,21 +394,18 @@ static void vmbus_bus_exit(void) return; } -/*++ - -Name: vmbus_child_driver_register() - -Desc: Register a vmbus's child driver - ---*/ -int vmbus_child_driver_register(struct driver_context* driver_ctx) +/** + * vmbus_child_driver_register - 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); + 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; @@ -502,21 +418,17 @@ int vmbus_child_driver_register(struct driver_context* driver_ctx) 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) +/** + * vmbus_child_driver_unregister 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); + DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", + driver_ctx, driver_ctx->driver.name); driver_unregister(&driver_ctx->driver); @@ -524,47 +436,37 @@ void vmbus_child_driver_unregister(struct driver_context* driver_ctx) 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 ---*/ +/** + * vmbus_get_interface - 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) +/** + * vmbus_child_device_get_info - 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. - ---*/ +/** + * vmbus_child_device_create - 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) @@ -576,31 +478,38 @@ static struct hv_device *vmbus_child_device_create(struct hv_guid *type, /* 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"); + 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}", + "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]); + 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_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)); @@ -610,53 +519,59 @@ static struct hv_device *vmbus_child_device_create(struct hv_guid *type, 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) +/** + * vmbus_child_device_register - 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); + 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); + 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)); + 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)); + 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() */ + /* + * 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); + 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); + DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", + &child_device_ctx->device); Cleanup: DPRINT_EXIT(VMBUS_DRV); @@ -664,38 +579,33 @@ static int vmbus_child_device_register(struct hv_device *root_device_obj, struct return ret; } -/*++ - -Name: vmbus_child_device_unregister() - -Desc: Remove the specified child device from the vmbus. - ---*/ +/** + * vmbus_child_device_unregister - 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); + 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() */ + /* + * 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_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. - ---*/ +/** + * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. + */ static void vmbus_child_device_destroy(struct hv_device *device_obj) { DPRINT_ENTER(VMBUS_DRV); @@ -703,66 +613,83 @@ static void vmbus_child_device_destroy(struct hv_device *device_obj) 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 - ---*/ +/** + * 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 device_context *device_ctx = device_to_device_context(device); - int i=0; - int len=0; + 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]); + 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]); + 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]); + 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; @@ -771,29 +698,32 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) return 0; } -/*++ - -Name: vmbus_match() - -Desc: Attempt to match the specified device to the specified driver - ---*/ +/** + * 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; + 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; + 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); + DPRINT_INFO(VMBUS_DRV, + "device object (%p) set to driver object (%p)", + &device_ctx->device_obj, + device_ctx->device_obj.Driver); match = 1; } @@ -803,62 +733,58 @@ static int vmbus_match(struct device *device, struct device_driver *driver) 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() ---*/ +/** + * vmbus_probe_failed_cb - 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; - + 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() */ + /* + * 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 - ---*/ +/** + * vmbus_probe - 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); + 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) - { + 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); + 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); + } else { + DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", + child_device->driver->name); ret = -1; } @@ -866,61 +792,51 @@ static int vmbus_probe(struct device *child_device) return ret; } - -/*++ - -Name: vmbus_remove() - -Desc: Remove a vmbus device - ---*/ +/** + * vmbus_remove - Remove a vmbus device + */ static int vmbus_remove(struct device *child_device) { - int ret=0; + int ret; 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() */ + 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) - { + 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) - { + /* + * 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); + } 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 - ---*/ +/** + * vmbus_shutdown - Shutdown a vmbus device + */ static void vmbus_shutdown(struct device *child_device) { struct driver_context *driver_ctx; @@ -928,16 +844,17 @@ static void vmbus_shutdown(struct device *child_device) 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() */ + 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) - { + if (!child_device->driver) { DPRINT_EXIT(VMBUS_DRV); return; } @@ -946,22 +863,16 @@ static void vmbus_shutdown(struct device *child_device) /* 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 - ---*/ +/** + * vmbus_bus_release - Final callback release of the vmbus root device + */ static void vmbus_bus_release(struct device *device) { DPRINT_ENTER(VMBUS_DRV); @@ -973,13 +884,9 @@ static void vmbus_bus_release(struct device *device) DPRINT_EXIT(VMBUS_DRV); } -/*++ - -Name: vmbus_device_release() - -Desc: Final callback release of the vmbus child device - ---*/ +/** + * vmbus_device_release - 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); @@ -990,19 +897,14 @@ static void vmbus_device_release(struct device *device) 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 - ---*/ +/** + * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages + */ static void vmbus_msg_dpc(unsigned long data) { struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; @@ -1017,13 +919,9 @@ static void vmbus_msg_dpc(unsigned long data) DPRINT_EXIT(VMBUS_DRV); } -/*++ - -Name: vmbus_msg_dpc() - -Desc: Tasklet routine to handle hypervisor events - ---*/ +/** + * vmbus_msg_dpc - Tasklet routine to handle hypervisor events + */ static void vmbus_event_dpc(unsigned long data) { struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; @@ -1038,17 +936,10 @@ static void vmbus_event_dpc(unsigned long data) DPRINT_EXIT(VMBUS_DRV); } -/*++ - -Name: vmbus_msg_dpc() - -Desc: ISR routine - ---*/ -static irqreturn_t vmbus_isr(int irq, void* dev_id) +static irqreturn_t vmbus_isr(int irq, void *dev_id) { - int ret=0; struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; + int ret; DPRINT_ENTER(VMBUS_DRV); @@ -1058,48 +949,31 @@ static irqreturn_t vmbus_isr(int irq, void* dev_id) ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); /* Schedules a dpc if necessary */ - if (ret > 0) - { - if (test_bit(0, (unsigned long*)&ret)) - { + if (ret > 0) { + if (test_bit(0, (unsigned long *)&ret)) tasklet_schedule(&g_vmbus_drv.msg_dpc); - } - if (test_bit(1, (unsigned long*)&ret)) - { + if (test_bit(1, (unsigned long *)&ret)) tasklet_schedule(&g_vmbus_drv.event_dpc); - } DPRINT_EXIT(VMBUS_DRV); return IRQ_HANDLED; - } - else - { + } 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; + 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. */ + /* Todo: it is used for loglevel, to be ported to new kernel. */ ret = vmbus_bus_init(VmbusInitialize); @@ -1107,29 +981,19 @@ static int __init vmbus_init(void) 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. */ + /* Todo: it is used for loglevel, to be ported to new kernel. */ DPRINT_EXIT(VMBUS_DRV); - return; } +MODULE_LICENSE("GPL"); module_param(vmbus_irq, int, S_IRUGO); module_param(vmbus_loglevel, int, S_IRUGO); module_init(vmbus_init); module_exit(vmbus_exit); -/* eof */