Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 2 | * Copyright (c) 2009, Microsoft Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Authors: |
| 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
| 19 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 20 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 21 | #include <linux/init.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/device.h> |
| 24 | #include <linux/irq.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/sysctl.h> |
Greg Kroah-Hartman | 9a775db | 2010-02-25 16:42:10 -0800 | [diff] [blame] | 27 | #include <linux/pci.h> |
Greg Kroah-Hartman | c22090f | 2010-02-25 16:43:15 -0800 | [diff] [blame] | 28 | #include <linux/dmi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 29 | #include <linux/slab.h> |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 30 | #include "VersionInfo.h" |
Greg Kroah-Hartman | 4983b39 | 2009-08-19 16:14:47 -0700 | [diff] [blame] | 31 | #include "osd.h" |
Greg Kroah-Hartman | 645954c | 2009-08-28 16:22:59 -0700 | [diff] [blame] | 32 | #include "logging.h" |
Greg Kroah-Hartman | 870cde8 | 2009-08-19 16:21:28 -0700 | [diff] [blame] | 33 | #include "vmbus.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 34 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 35 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 36 | /* FIXME! We need to do this dynamically for PIC and APIC system */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 37 | #define VMBUS_IRQ 0x5 |
| 38 | #define VMBUS_IRQ_VECTOR IRQ5_VECTOR |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 39 | |
| 40 | /* Main vmbus driver data structure */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 41 | struct vmbus_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 42 | /* !! These must be the first 2 fields !! */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 43 | /* FIXME, this is a bug */ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 44 | /* The driver field is not used in here. Instead, the bus field is */ |
| 45 | /* used to represent the driver */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 46 | struct driver_context drv_ctx; |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 47 | struct vmbus_driver drv_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 48 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 49 | struct bus_type bus; |
| 50 | struct tasklet_struct msg_dpc; |
| 51 | struct tasklet_struct event_dpc; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 52 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 53 | /* The bus root device */ |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 54 | struct vm_device device_ctx; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 55 | }; |
| 56 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 57 | static int vmbus_match(struct device *device, struct device_driver *driver); |
| 58 | static int vmbus_probe(struct device *device); |
| 59 | static int vmbus_remove(struct device *device); |
| 60 | static void vmbus_shutdown(struct device *device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 61 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 62 | static void vmbus_msg_dpc(unsigned long data); |
| 63 | static void vmbus_event_dpc(unsigned long data); |
| 64 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 65 | static irqreturn_t vmbus_isr(int irq, void *dev_id); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 66 | |
| 67 | static void vmbus_device_release(struct device *device); |
| 68 | static void vmbus_bus_release(struct device *device); |
| 69 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 70 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
| 71 | struct hv_guid *instance, |
| 72 | void *context); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 73 | static void vmbus_child_device_destroy(struct hv_device *device_obj); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 74 | static int vmbus_child_device_register(struct hv_device *root_device_obj, |
| 75 | struct hv_device *child_device_obj); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 76 | static void vmbus_child_device_unregister(struct hv_device *child_device_obj); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 77 | static void vmbus_child_device_get_info(struct hv_device *device_obj, |
| 78 | struct hv_device_info *device_info); |
| 79 | static ssize_t vmbus_show_device_attr(struct device *dev, |
| 80 | struct device_attribute *dev_attr, |
| 81 | char *buf); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 82 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 83 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 84 | unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 85 | EXPORT_SYMBOL(vmbus_loglevel); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 86 | /* (ALL_MODULES << 16 | DEBUG_LVL_ENTEREXIT); */ |
| 87 | /* (((VMBUS | VMBUS_DRV)<<16) | DEBUG_LVL_ENTEREXIT); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 88 | |
| 89 | static int vmbus_irq = VMBUS_IRQ; |
| 90 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 91 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 92 | static struct device_attribute vmbus_device_attrs[] = { |
| 93 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 94 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), |
| 95 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 96 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 97 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 98 | |
| 99 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), |
| 100 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), |
| 101 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 102 | |
| 103 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), |
| 104 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), |
| 105 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 106 | |
| 107 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), |
| 108 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 109 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 110 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 111 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 112 | |
| 113 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), |
| 114 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 115 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 116 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 117 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 118 | __ATTR_NULL |
| 119 | }; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 120 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 121 | /* The one and only one */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 122 | static struct vmbus_driver_context g_vmbus_drv = { |
| 123 | .bus.name = "vmbus", |
| 124 | .bus.match = vmbus_match, |
| 125 | .bus.shutdown = vmbus_shutdown, |
| 126 | .bus.remove = vmbus_remove, |
| 127 | .bus.probe = vmbus_probe, |
| 128 | .bus.uevent = vmbus_uevent, |
| 129 | .bus.dev_attrs = vmbus_device_attrs, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 130 | }; |
| 131 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 132 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 133 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
| 134 | * |
| 135 | * This is invoked when user does a |
| 136 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" |
| 137 | */ |
| 138 | static ssize_t vmbus_show_device_attr(struct device *dev, |
| 139 | struct device_attribute *dev_attr, |
| 140 | char *buf) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 141 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 142 | struct vm_device *device_ctx = device_to_vm_device(dev); |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 143 | struct hv_device_info device_info; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 144 | |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 145 | memset(&device_info, 0, sizeof(struct hv_device_info)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 146 | |
| 147 | vmbus_child_device_get_info(&device_ctx->device_obj, &device_info); |
| 148 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 149 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
| 150 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 151 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", |
| 152 | device_info.ChannelType.data[3], |
| 153 | device_info.ChannelType.data[2], |
| 154 | device_info.ChannelType.data[1], |
| 155 | device_info.ChannelType.data[0], |
| 156 | device_info.ChannelType.data[5], |
| 157 | device_info.ChannelType.data[4], |
| 158 | device_info.ChannelType.data[7], |
| 159 | device_info.ChannelType.data[6], |
| 160 | device_info.ChannelType.data[8], |
| 161 | device_info.ChannelType.data[9], |
| 162 | device_info.ChannelType.data[10], |
| 163 | device_info.ChannelType.data[11], |
| 164 | device_info.ChannelType.data[12], |
| 165 | device_info.ChannelType.data[13], |
| 166 | device_info.ChannelType.data[14], |
| 167 | device_info.ChannelType.data[15]); |
| 168 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
| 169 | return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 170 | "%02x%02x%02x%02x%02x%02x%02x%02x}\n", |
| 171 | device_info.ChannelInstance.data[3], |
| 172 | device_info.ChannelInstance.data[2], |
| 173 | device_info.ChannelInstance.data[1], |
| 174 | device_info.ChannelInstance.data[0], |
| 175 | device_info.ChannelInstance.data[5], |
| 176 | device_info.ChannelInstance.data[4], |
| 177 | device_info.ChannelInstance.data[7], |
| 178 | device_info.ChannelInstance.data[6], |
| 179 | device_info.ChannelInstance.data[8], |
| 180 | device_info.ChannelInstance.data[9], |
| 181 | device_info.ChannelInstance.data[10], |
| 182 | device_info.ChannelInstance.data[11], |
| 183 | device_info.ChannelInstance.data[12], |
| 184 | device_info.ChannelInstance.data[13], |
| 185 | device_info.ChannelInstance.data[14], |
| 186 | device_info.ChannelInstance.data[15]); |
| 187 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 188 | return sprintf(buf, "%d\n", device_info.ChannelState); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 189 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 190 | return sprintf(buf, "%d\n", device_info.ChannelId); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 191 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 192 | return sprintf(buf, "%d\n", device_info.Outbound.InterruptMask); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 193 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 194 | return sprintf(buf, "%d\n", device_info.Outbound.ReadIndex); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 195 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 196 | return sprintf(buf, "%d\n", device_info.Outbound.WriteIndex); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 197 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
| 198 | return sprintf(buf, "%d\n", |
| 199 | device_info.Outbound.BytesAvailToRead); |
| 200 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
| 201 | return sprintf(buf, "%d\n", |
| 202 | device_info.Outbound.BytesAvailToWrite); |
| 203 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 204 | return sprintf(buf, "%d\n", device_info.Inbound.InterruptMask); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 205 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 206 | return sprintf(buf, "%d\n", device_info.Inbound.ReadIndex); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 207 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 208 | return sprintf(buf, "%d\n", device_info.Inbound.WriteIndex); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 209 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
| 210 | return sprintf(buf, "%d\n", |
| 211 | device_info.Inbound.BytesAvailToRead); |
| 212 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
| 213 | return sprintf(buf, "%d\n", |
| 214 | device_info.Inbound.BytesAvailToWrite); |
| 215 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 216 | return sprintf(buf, "%d\n", device_info.MonitorId); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 217 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 218 | return sprintf(buf, "%d\n", device_info.ServerMonitorPending); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 219 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 220 | return sprintf(buf, "%d\n", device_info.ServerMonitorLatency); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 221 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
| 222 | return sprintf(buf, "%d\n", |
| 223 | device_info.ServerMonitorConnectionId); |
| 224 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 225 | return sprintf(buf, "%d\n", device_info.ClientMonitorPending); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 226 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 227 | return sprintf(buf, "%d\n", device_info.ClientMonitorLatency); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 228 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
| 229 | return sprintf(buf, "%d\n", |
| 230 | device_info.ClientMonitorConnectionId); |
| 231 | } else { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 232 | return 0; |
| 233 | } |
| 234 | } |
| 235 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 236 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 237 | * vmbus_bus_init -Main vmbus driver initialization routine. |
| 238 | * |
| 239 | * Here, we |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame^] | 240 | * - initialize the vmbus driver context |
| 241 | * - setup various driver entry points |
| 242 | * - invoke the vmbus hv main init routine |
| 243 | * - get the irq resource |
| 244 | * - invoke the vmbus to add the vmbus root device |
| 245 | * - setup the vmbus root device |
| 246 | * - retrieve the channel offers |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 247 | */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 248 | static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 249 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 250 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 251 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 252 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 253 | int ret; |
| 254 | unsigned int vector; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 255 | |
| 256 | DPRINT_ENTER(VMBUS_DRV); |
| 257 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 258 | /* |
| 259 | * Set this up to allow lower layer to callback to add/remove child |
| 260 | * devices on the bus |
| 261 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 262 | vmbus_drv_obj->OnChildDeviceCreate = vmbus_child_device_create; |
| 263 | vmbus_drv_obj->OnChildDeviceDestroy = vmbus_child_device_destroy; |
| 264 | vmbus_drv_obj->OnChildDeviceAdd = vmbus_child_device_register; |
| 265 | vmbus_drv_obj->OnChildDeviceRemove = vmbus_child_device_unregister; |
| 266 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 267 | /* Call to bus driver to initialize */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 268 | ret = drv_init(&vmbus_drv_obj->Base); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 269 | if (ret != 0) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 270 | DPRINT_ERR(VMBUS_DRV, "Unable to initialize vmbus (%d)", ret); |
| 271 | goto cleanup; |
| 272 | } |
| 273 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 274 | /* Sanity checks */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 275 | if (!vmbus_drv_obj->Base.OnDeviceAdd) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 276 | DPRINT_ERR(VMBUS_DRV, "OnDeviceAdd() routine not set"); |
| 277 | ret = -1; |
| 278 | goto cleanup; |
| 279 | } |
| 280 | |
| 281 | vmbus_drv_ctx->bus.name = vmbus_drv_obj->Base.name; |
| 282 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 283 | /* Initialize the bus context */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 284 | tasklet_init(&vmbus_drv_ctx->msg_dpc, vmbus_msg_dpc, |
| 285 | (unsigned long)vmbus_drv_obj); |
| 286 | tasklet_init(&vmbus_drv_ctx->event_dpc, vmbus_event_dpc, |
| 287 | (unsigned long)vmbus_drv_obj); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 288 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 289 | /* Now, register the bus driver with LDM */ |
Bill Pemberton | c19fbca | 2009-07-27 16:47:35 -0400 | [diff] [blame] | 290 | ret = bus_register(&vmbus_drv_ctx->bus); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 291 | if (ret) { |
Bill Pemberton | c19fbca | 2009-07-27 16:47:35 -0400 | [diff] [blame] | 292 | ret = -1; |
| 293 | goto cleanup; |
| 294 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 295 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 296 | /* Get the interrupt resource */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 297 | ret = request_irq(vmbus_irq, vmbus_isr, IRQF_SAMPLE_RANDOM, |
| 298 | vmbus_drv_obj->Base.name, NULL); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 299 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 300 | if (ret != 0) { |
| 301 | DPRINT_ERR(VMBUS_DRV, "ERROR - Unable to request IRQ %d", |
| 302 | vmbus_irq); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 303 | |
| 304 | bus_unregister(&vmbus_drv_ctx->bus); |
| 305 | |
| 306 | ret = -1; |
| 307 | goto cleanup; |
| 308 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 309 | vector = VMBUS_IRQ_VECTOR; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 310 | |
| 311 | DPRINT_INFO(VMBUS_DRV, "irq 0x%x vector 0x%x", vmbus_irq, vector); |
| 312 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 313 | /* Call to bus driver to add the root device */ |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 314 | memset(dev_ctx, 0, sizeof(struct vm_device)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 315 | |
| 316 | ret = vmbus_drv_obj->Base.OnDeviceAdd(&dev_ctx->device_obj, &vector); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 317 | if (ret != 0) { |
| 318 | DPRINT_ERR(VMBUS_DRV, |
| 319 | "ERROR - Unable to add vmbus root device"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 320 | |
| 321 | free_irq(vmbus_irq, NULL); |
| 322 | |
| 323 | bus_unregister(&vmbus_drv_ctx->bus); |
| 324 | |
| 325 | ret = -1; |
| 326 | goto cleanup; |
| 327 | } |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 328 | /* strcpy(dev_ctx->device.bus_id, dev_ctx->device_obj.name); */ |
Greg Kroah-Hartman | 09d50ff | 2009-07-13 17:09:34 -0700 | [diff] [blame] | 329 | dev_set_name(&dev_ctx->device, "vmbus_0_0"); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 330 | memcpy(&dev_ctx->class_id, &dev_ctx->device_obj.deviceType, |
| 331 | sizeof(struct hv_guid)); |
| 332 | memcpy(&dev_ctx->device_id, &dev_ctx->device_obj.deviceInstance, |
| 333 | sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 334 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 335 | /* No need to bind a driver to the root device. */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 336 | dev_ctx->device.parent = NULL; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 337 | /* NULL; vmbus_remove() does not get invoked */ |
| 338 | dev_ctx->device.bus = &vmbus_drv_ctx->bus; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 339 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 340 | /* Setup the device dispatch table */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 341 | dev_ctx->device.release = vmbus_bus_release; |
| 342 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 343 | /* Setup the bus as root device */ |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 344 | ret = device_register(&dev_ctx->device); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 345 | if (ret) { |
| 346 | DPRINT_ERR(VMBUS_DRV, |
| 347 | "ERROR - Unable to register vmbus root device"); |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 348 | |
| 349 | free_irq(vmbus_irq, NULL); |
| 350 | bus_unregister(&vmbus_drv_ctx->bus); |
| 351 | |
| 352 | ret = -1; |
| 353 | goto cleanup; |
| 354 | } |
| 355 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 356 | |
| 357 | vmbus_drv_obj->GetChannelOffers(); |
| 358 | |
| 359 | cleanup: |
| 360 | DPRINT_EXIT(VMBUS_DRV); |
| 361 | |
| 362 | return ret; |
| 363 | } |
| 364 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 365 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 366 | * vmbus_bus_exit - Terminate the vmbus driver. |
| 367 | * |
| 368 | * This routine is opposite of vmbus_bus_init() |
| 369 | */ |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 370 | static void vmbus_bus_exit(void) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 371 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 372 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 373 | struct vmbus_driver_context *vmbus_drv_ctx = &g_vmbus_drv; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 374 | |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 375 | struct vm_device *dev_ctx = &g_vmbus_drv.device_ctx; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 376 | |
| 377 | DPRINT_ENTER(VMBUS_DRV); |
| 378 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 379 | /* Remove the root device */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 380 | if (vmbus_drv_obj->Base.OnDeviceRemove) |
| 381 | vmbus_drv_obj->Base.OnDeviceRemove(&dev_ctx->device_obj); |
| 382 | |
| 383 | if (vmbus_drv_obj->Base.OnCleanup) |
| 384 | vmbus_drv_obj->Base.OnCleanup(&vmbus_drv_obj->Base); |
| 385 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 386 | /* Unregister the root bus device */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 387 | device_unregister(&dev_ctx->device); |
| 388 | |
| 389 | bus_unregister(&vmbus_drv_ctx->bus); |
| 390 | |
| 391 | free_irq(vmbus_irq, NULL); |
| 392 | |
| 393 | tasklet_kill(&vmbus_drv_ctx->msg_dpc); |
| 394 | tasklet_kill(&vmbus_drv_ctx->event_dpc); |
| 395 | |
| 396 | DPRINT_EXIT(VMBUS_DRV); |
| 397 | |
| 398 | return; |
| 399 | } |
| 400 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 401 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 402 | /** |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 403 | * vmbus_child_driver_register() - Register a vmbus's child driver |
| 404 | * @driver_ctx: Pointer to driver structure you want to register |
| 405 | * |
| 406 | * @driver_ctx is of type &struct driver_context |
| 407 | * |
| 408 | * Registers the given driver with Linux through the 'driver_register()' call |
| 409 | * And sets up the hyper-v vmbus handling for this driver. |
| 410 | * It will return the state of the 'driver_register()' call. |
| 411 | * |
| 412 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 413 | */ |
| 414 | int vmbus_child_driver_register(struct driver_context *driver_ctx) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 415 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 416 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 417 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 418 | |
| 419 | DPRINT_ENTER(VMBUS_DRV); |
| 420 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 421 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) registering - name %s", |
| 422 | driver_ctx, driver_ctx->driver.name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 423 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 424 | /* The child driver on this vmbus */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 425 | driver_ctx->driver.bus = &g_vmbus_drv.bus; |
| 426 | |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 427 | ret = driver_register(&driver_ctx->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 428 | |
| 429 | vmbus_drv_obj->GetChannelOffers(); |
| 430 | |
| 431 | DPRINT_EXIT(VMBUS_DRV); |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 432 | |
| 433 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 434 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 435 | EXPORT_SYMBOL(vmbus_child_driver_register); |
| 436 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 437 | /** |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 438 | * vmbus_child_driver_unregister() - Unregister a vmbus's child driver |
| 439 | * @driver_ctx: Pointer to driver structure you want to un-register |
| 440 | * |
| 441 | * @driver_ctx is of type &struct driver_context |
| 442 | * |
| 443 | * Un-register the given driver with Linux through the 'driver_unregister()' |
| 444 | * call. And ungegisters the driver from the Hyper-V vmbus handler. |
| 445 | * |
| 446 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 447 | */ |
| 448 | void vmbus_child_driver_unregister(struct driver_context *driver_ctx) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 449 | { |
| 450 | DPRINT_ENTER(VMBUS_DRV); |
| 451 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 452 | DPRINT_INFO(VMBUS_DRV, "child driver (%p) unregistering - name %s", |
| 453 | driver_ctx, driver_ctx->driver.name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 454 | |
| 455 | driver_unregister(&driver_ctx->driver); |
| 456 | |
| 457 | driver_ctx->driver.bus = NULL; |
| 458 | |
| 459 | DPRINT_EXIT(VMBUS_DRV); |
| 460 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 461 | EXPORT_SYMBOL(vmbus_child_driver_unregister); |
| 462 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 463 | /** |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 464 | * vmbus_get_interface() - Get the vmbus channel interface. |
| 465 | * @interface: Pointer to channel interface structure |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 466 | * |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 467 | * Get the Hyper-V channel used for the driver. |
| 468 | * |
| 469 | * @interface is of type &struct vmbus_channel_interface |
| 470 | * This is invoked by child/client driver that sits above vmbus. |
| 471 | * |
| 472 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 473 | */ |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 474 | void vmbus_get_interface(struct vmbus_channel_interface *interface) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 475 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 476 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 477 | |
| 478 | vmbus_drv_obj->GetChannelInterface(interface); |
| 479 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 480 | EXPORT_SYMBOL(vmbus_get_interface); |
| 481 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 482 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 483 | * vmbus_child_device_get_info - Get the vmbus child device info. |
| 484 | * |
| 485 | * This is invoked to display various device attributes in sysfs. |
| 486 | */ |
| 487 | static void vmbus_child_device_get_info(struct hv_device *device_obj, |
| 488 | struct hv_device_info *device_info) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 489 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 490 | struct vmbus_driver *vmbus_drv_obj = &g_vmbus_drv.drv_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 491 | |
| 492 | vmbus_drv_obj->GetChannelInfo(device_obj, device_info); |
| 493 | } |
| 494 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 495 | /* |
| 496 | * vmbus_child_device_create - Creates and registers a new child device |
| 497 | * on the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 498 | */ |
Greg Kroah-Hartman | daaa8cc | 2009-08-19 16:18:56 -0700 | [diff] [blame] | 499 | static struct hv_device *vmbus_child_device_create(struct hv_guid *type, |
| 500 | struct hv_guid *instance, |
| 501 | void *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 502 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 503 | struct vm_device *child_device_ctx; |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 504 | struct hv_device *child_device_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 505 | |
| 506 | DPRINT_ENTER(VMBUS_DRV); |
| 507 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 508 | /* Allocate the new child device */ |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 509 | child_device_ctx = kzalloc(sizeof(struct vm_device), GFP_KERNEL); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 510 | if (!child_device_ctx) { |
| 511 | DPRINT_ERR(VMBUS_DRV, |
| 512 | "unable to allocate device_context for child device"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 513 | DPRINT_EXIT(VMBUS_DRV); |
| 514 | |
| 515 | return NULL; |
| 516 | } |
| 517 | |
| 518 | DPRINT_DBG(VMBUS_DRV, "child device (%p) allocated - " |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 519 | "type {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 520 | "%02x%02x%02x%02x%02x%02x%02x%02x}," |
| 521 | "id {%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 522 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 523 | &child_device_ctx->device, |
Greg Kroah-Hartman | daaa8cc | 2009-08-19 16:18:56 -0700 | [diff] [blame] | 524 | type->data[3], type->data[2], type->data[1], type->data[0], |
| 525 | type->data[5], type->data[4], type->data[7], type->data[6], |
| 526 | type->data[8], type->data[9], type->data[10], type->data[11], |
| 527 | type->data[12], type->data[13], type->data[14], type->data[15], |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 528 | instance->data[3], instance->data[2], |
| 529 | instance->data[1], instance->data[0], |
| 530 | instance->data[5], instance->data[4], |
| 531 | instance->data[7], instance->data[6], |
| 532 | instance->data[8], instance->data[9], |
| 533 | instance->data[10], instance->data[11], |
| 534 | instance->data[12], instance->data[13], |
| 535 | instance->data[14], instance->data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 536 | |
| 537 | child_device_obj = &child_device_ctx->device_obj; |
| 538 | child_device_obj->context = context; |
Milan Dadok | 9fb5cce | 2009-10-28 23:23:27 +0100 | [diff] [blame] | 539 | memcpy(&child_device_obj->deviceType, type, sizeof(struct hv_guid)); |
| 540 | memcpy(&child_device_obj->deviceInstance, instance, |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 541 | sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 542 | |
Milan Dadok | 9fb5cce | 2009-10-28 23:23:27 +0100 | [diff] [blame] | 543 | memcpy(&child_device_ctx->class_id, type, sizeof(struct hv_guid)); |
| 544 | memcpy(&child_device_ctx->device_id, instance, sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 545 | |
| 546 | DPRINT_EXIT(VMBUS_DRV); |
| 547 | |
| 548 | return child_device_obj; |
| 549 | } |
| 550 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 551 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 552 | * vmbus_child_device_register - Register the child device on the specified bus |
| 553 | */ |
| 554 | static int vmbus_child_device_register(struct hv_device *root_device_obj, |
| 555 | struct hv_device *child_device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 556 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 557 | int ret = 0; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 558 | struct vm_device *root_device_ctx = |
| 559 | to_vm_device(root_device_obj); |
| 560 | struct vm_device *child_device_ctx = |
| 561 | to_vm_device(child_device_obj); |
Bill Pemberton | f488841 | 2009-07-29 17:00:12 -0400 | [diff] [blame] | 562 | static atomic_t device_num = ATOMIC_INIT(0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 563 | |
| 564 | DPRINT_ENTER(VMBUS_DRV); |
| 565 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 566 | DPRINT_DBG(VMBUS_DRV, "child device (%p) registering", |
| 567 | child_device_ctx); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 568 | |
Haiyang Zhang | 1bb40a2 | 2009-10-23 18:14:24 +0000 | [diff] [blame] | 569 | /* Set the device name. Otherwise, device_register() will fail. */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 570 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
| 571 | atomic_inc_return(&device_num)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 572 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 573 | /* The new device belongs to this bus */ |
| 574 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 575 | child_device_ctx->device.parent = &root_device_ctx->device; |
| 576 | child_device_ctx->device.release = vmbus_device_release; |
| 577 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 578 | /* |
| 579 | * Register with the LDM. This will kick off the driver/device |
| 580 | * binding...which will eventually call vmbus_match() and vmbus_probe() |
| 581 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 582 | ret = device_register(&child_device_ctx->device); |
| 583 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 584 | /* vmbus_probe() error does not get propergate to device_register(). */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 585 | ret = child_device_ctx->probe_error; |
| 586 | |
| 587 | if (ret) |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 588 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
| 589 | &child_device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 590 | else |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 591 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
| 592 | &child_device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 593 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 594 | DPRINT_EXIT(VMBUS_DRV); |
| 595 | |
| 596 | return ret; |
| 597 | } |
| 598 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 599 | /* |
| 600 | * vmbus_child_device_unregister - Remove the specified child device |
| 601 | * from the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 602 | */ |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 603 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 604 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 605 | struct vm_device *device_ctx = to_vm_device(device_obj); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 606 | |
| 607 | DPRINT_ENTER(VMBUS_DRV); |
| 608 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 609 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
| 610 | &device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 611 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 612 | /* |
| 613 | * Kick off the process of unregistering the device. |
| 614 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 615 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 616 | device_unregister(&device_ctx->device); |
| 617 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 618 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
| 619 | &device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 620 | |
| 621 | DPRINT_EXIT(VMBUS_DRV); |
| 622 | } |
| 623 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 624 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 625 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. |
| 626 | */ |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 627 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 628 | { |
| 629 | DPRINT_ENTER(VMBUS_DRV); |
| 630 | |
| 631 | DPRINT_EXIT(VMBUS_DRV); |
| 632 | } |
| 633 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 634 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 635 | * vmbus_uevent - add uevent for our device |
| 636 | * |
| 637 | * This routine is invoked when a device is added or removed on the vmbus to |
| 638 | * generate a uevent to udev in the userspace. The udev will then look at its |
| 639 | * rule and the uevent generated here to load the appropriate driver |
| 640 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 641 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
| 642 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 643 | struct vm_device *device_ctx = device_to_vm_device(device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 644 | int ret; |
| 645 | |
| 646 | DPRINT_ENTER(VMBUS_DRV); |
| 647 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 648 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
| 649 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 650 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
| 651 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], |
| 652 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], |
| 653 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], |
| 654 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], |
| 655 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], |
| 656 | device_ctx->class_id.data[10], |
| 657 | device_ctx->class_id.data[11], |
| 658 | device_ctx->class_id.data[12], |
| 659 | device_ctx->class_id.data[13], |
| 660 | device_ctx->class_id.data[14], |
| 661 | device_ctx->class_id.data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 662 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 663 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
| 664 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 665 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
| 666 | device_ctx->class_id.data[3], |
| 667 | device_ctx->class_id.data[2], |
| 668 | device_ctx->class_id.data[1], |
| 669 | device_ctx->class_id.data[0], |
| 670 | device_ctx->class_id.data[5], |
| 671 | device_ctx->class_id.data[4], |
| 672 | device_ctx->class_id.data[7], |
| 673 | device_ctx->class_id.data[6], |
| 674 | device_ctx->class_id.data[8], |
| 675 | device_ctx->class_id.data[9], |
| 676 | device_ctx->class_id.data[10], |
| 677 | device_ctx->class_id.data[11], |
| 678 | device_ctx->class_id.data[12], |
| 679 | device_ctx->class_id.data[13], |
| 680 | device_ctx->class_id.data[14], |
| 681 | device_ctx->class_id.data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 682 | |
| 683 | if (ret) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 684 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 685 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 686 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
| 687 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 688 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
| 689 | device_ctx->device_id.data[3], |
| 690 | device_ctx->device_id.data[2], |
| 691 | device_ctx->device_id.data[1], |
| 692 | device_ctx->device_id.data[0], |
| 693 | device_ctx->device_id.data[5], |
| 694 | device_ctx->device_id.data[4], |
| 695 | device_ctx->device_id.data[7], |
| 696 | device_ctx->device_id.data[6], |
| 697 | device_ctx->device_id.data[8], |
| 698 | device_ctx->device_id.data[9], |
| 699 | device_ctx->device_id.data[10], |
| 700 | device_ctx->device_id.data[11], |
| 701 | device_ctx->device_id.data[12], |
| 702 | device_ctx->device_id.data[13], |
| 703 | device_ctx->device_id.data[14], |
| 704 | device_ctx->device_id.data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 705 | if (ret) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 706 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 707 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 708 | DPRINT_EXIT(VMBUS_DRV); |
| 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 713 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 714 | * vmbus_match - Attempt to match the specified device to the specified driver |
| 715 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 716 | static int vmbus_match(struct device *device, struct device_driver *driver) |
| 717 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 718 | int match = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 719 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 720 | struct vm_device *device_ctx = device_to_vm_device(device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 721 | |
| 722 | DPRINT_ENTER(VMBUS_DRV); |
| 723 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 724 | /* We found our driver ? */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 725 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
| 726 | sizeof(struct hv_guid)) == 0) { |
| 727 | /* |
| 728 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast |
| 729 | * it here to access the struct hv_driver field |
| 730 | */ |
| 731 | struct vmbus_driver_context *vmbus_drv_ctx = |
| 732 | (struct vmbus_driver_context *)driver_ctx; |
| 733 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 734 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 735 | DPRINT_INFO(VMBUS_DRV, |
| 736 | "device object (%p) set to driver object (%p)", |
| 737 | &device_ctx->device_obj, |
| 738 | device_ctx->device_obj.Driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 739 | |
| 740 | match = 1; |
| 741 | } |
| 742 | |
| 743 | DPRINT_EXIT(VMBUS_DRV); |
| 744 | |
| 745 | return match; |
| 746 | } |
| 747 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 748 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 749 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
| 750 | * |
| 751 | * We need a callback because we cannot invoked device_unregister() inside |
| 752 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() |
| 753 | * i.e. we cannot call device_unregister() inside device_register() |
| 754 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 755 | static void vmbus_probe_failed_cb(struct work_struct *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 756 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 757 | struct vm_device *device_ctx = (struct vm_device *)context; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 758 | |
| 759 | DPRINT_ENTER(VMBUS_DRV); |
| 760 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 761 | /* |
| 762 | * Kick off the process of unregistering the device. |
| 763 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 764 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 765 | device_unregister(&device_ctx->device); |
| 766 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 767 | /* put_device(&device_ctx->device); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 768 | DPRINT_EXIT(VMBUS_DRV); |
| 769 | } |
| 770 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 771 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 772 | * vmbus_probe - Add the new vmbus's child device |
| 773 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 774 | static int vmbus_probe(struct device *child_device) |
| 775 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 776 | int ret = 0; |
| 777 | struct driver_context *driver_ctx = |
| 778 | driver_to_driver_context(child_device->driver); |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 779 | struct vm_device *device_ctx = |
| 780 | device_to_vm_device(child_device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 781 | |
| 782 | DPRINT_ENTER(VMBUS_DRV); |
| 783 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 784 | /* Let the specific open-source driver handles the probe if it can */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 785 | if (driver_ctx->probe) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 786 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 787 | if (ret != 0) { |
| 788 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " |
| 789 | "(%p) on driver %s (%d)...", |
| 790 | dev_name(child_device), child_device, |
| 791 | child_device->driver->name, ret); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 792 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 793 | INIT_WORK(&device_ctx->probe_failed_work_item, |
| 794 | vmbus_probe_failed_cb); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 795 | schedule_work(&device_ctx->probe_failed_work_item); |
| 796 | } |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 797 | } else { |
| 798 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", |
| 799 | child_device->driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 800 | ret = -1; |
| 801 | } |
| 802 | |
| 803 | DPRINT_EXIT(VMBUS_DRV); |
| 804 | return ret; |
| 805 | } |
| 806 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 807 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 808 | * vmbus_remove - Remove a vmbus device |
| 809 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 810 | static int vmbus_remove(struct device *child_device) |
| 811 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 812 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 813 | struct driver_context *driver_ctx; |
| 814 | |
| 815 | DPRINT_ENTER(VMBUS_DRV); |
| 816 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 817 | /* Special case root bus device */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 818 | if (child_device->parent == NULL) { |
| 819 | /* |
| 820 | * No-op since it is statically defined and handle in |
| 821 | * vmbus_bus_exit() |
| 822 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 823 | DPRINT_EXIT(VMBUS_DRV); |
| 824 | return 0; |
| 825 | } |
| 826 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 827 | if (child_device->driver) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 828 | driver_ctx = driver_to_driver_context(child_device->driver); |
| 829 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 830 | /* |
| 831 | * Let the specific open-source driver handles the removal if |
| 832 | * it can |
| 833 | */ |
| 834 | if (driver_ctx->remove) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 835 | ret = driver_ctx->remove(child_device); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 836 | } else { |
| 837 | DPRINT_ERR(VMBUS_DRV, |
| 838 | "remove() method not set for driver - %s", |
| 839 | child_device->driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 840 | ret = -1; |
| 841 | } |
| 842 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 843 | |
| 844 | DPRINT_EXIT(VMBUS_DRV); |
| 845 | |
| 846 | return 0; |
| 847 | } |
| 848 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 849 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 850 | * vmbus_shutdown - Shutdown a vmbus device |
| 851 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 852 | static void vmbus_shutdown(struct device *child_device) |
| 853 | { |
| 854 | struct driver_context *driver_ctx; |
| 855 | |
| 856 | DPRINT_ENTER(VMBUS_DRV); |
| 857 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 858 | /* Special case root bus device */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 859 | if (child_device->parent == NULL) { |
| 860 | /* |
| 861 | * No-op since it is statically defined and handle in |
| 862 | * vmbus_bus_exit() |
| 863 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 864 | DPRINT_EXIT(VMBUS_DRV); |
| 865 | return; |
| 866 | } |
| 867 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 868 | /* The device may not be attached yet */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 869 | if (!child_device->driver) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 870 | DPRINT_EXIT(VMBUS_DRV); |
| 871 | return; |
| 872 | } |
| 873 | |
| 874 | driver_ctx = driver_to_driver_context(child_device->driver); |
| 875 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 876 | /* Let the specific open-source driver handles the removal if it can */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 877 | if (driver_ctx->shutdown) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 878 | driver_ctx->shutdown(child_device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 879 | |
| 880 | DPRINT_EXIT(VMBUS_DRV); |
| 881 | |
| 882 | return; |
| 883 | } |
| 884 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 885 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 886 | * vmbus_bus_release - Final callback release of the vmbus root device |
| 887 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 888 | static void vmbus_bus_release(struct device *device) |
| 889 | { |
| 890 | DPRINT_ENTER(VMBUS_DRV); |
Greg Kroah-Hartman | 689bf40 | 2009-09-01 20:12:58 -0700 | [diff] [blame] | 891 | /* FIXME */ |
| 892 | /* Empty release functions are a bug, or a major sign |
| 893 | * of a problem design, this MUST BE FIXED! */ |
| 894 | dev_err(device, "%s needs to be fixed!\n", __func__); |
| 895 | WARN_ON(1); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 896 | DPRINT_EXIT(VMBUS_DRV); |
| 897 | } |
| 898 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 899 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 900 | * vmbus_device_release - Final callback release of the vmbus child device |
| 901 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 902 | static void vmbus_device_release(struct device *device) |
| 903 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 904 | struct vm_device *device_ctx = device_to_vm_device(device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 905 | |
| 906 | DPRINT_ENTER(VMBUS_DRV); |
| 907 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 908 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 909 | kfree(device_ctx); |
| 910 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 911 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 912 | DPRINT_EXIT(VMBUS_DRV); |
| 913 | |
| 914 | return; |
| 915 | } |
| 916 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 917 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 918 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
| 919 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 920 | static void vmbus_msg_dpc(unsigned long data) |
| 921 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 922 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 923 | |
| 924 | DPRINT_ENTER(VMBUS_DRV); |
| 925 | |
| 926 | ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); |
| 927 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 928 | /* Call to bus driver to handle interrupt */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 929 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
| 930 | |
| 931 | DPRINT_EXIT(VMBUS_DRV); |
| 932 | } |
| 933 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 934 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 935 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events |
| 936 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 937 | static void vmbus_event_dpc(unsigned long data) |
| 938 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 939 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 940 | |
| 941 | DPRINT_ENTER(VMBUS_DRV); |
| 942 | |
| 943 | ASSERT(vmbus_drv_obj->OnEventDpc != NULL); |
| 944 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 945 | /* Call to bus driver to handle interrupt */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 946 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
| 947 | |
| 948 | DPRINT_EXIT(VMBUS_DRV); |
| 949 | } |
| 950 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 951 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 952 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 953 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 954 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 955 | |
| 956 | DPRINT_ENTER(VMBUS_DRV); |
| 957 | |
| 958 | ASSERT(vmbus_driver_obj->OnIsr != NULL); |
| 959 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 960 | /* Call to bus driver to handle interrupt */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 961 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
| 962 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 963 | /* Schedules a dpc if necessary */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 964 | if (ret > 0) { |
| 965 | if (test_bit(0, (unsigned long *)&ret)) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 966 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 967 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 968 | if (test_bit(1, (unsigned long *)&ret)) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 969 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 970 | |
| 971 | DPRINT_EXIT(VMBUS_DRV); |
| 972 | return IRQ_HANDLED; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 973 | } else { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 974 | DPRINT_EXIT(VMBUS_DRV); |
| 975 | return IRQ_NONE; |
| 976 | } |
| 977 | } |
| 978 | |
Greg Kroah-Hartman | c22090f | 2010-02-25 16:43:15 -0800 | [diff] [blame] | 979 | static struct dmi_system_id __initdata microsoft_hv_dmi_table[] = { |
| 980 | { |
| 981 | .ident = "Hyper-V", |
| 982 | .matches = { |
| 983 | DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), |
| 984 | DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"), |
| 985 | DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"), |
| 986 | }, |
| 987 | }, |
| 988 | { }, |
| 989 | }; |
| 990 | MODULE_DEVICE_TABLE(dmi, microsoft_hv_dmi_table); |
| 991 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 992 | static int __init vmbus_init(void) |
| 993 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 994 | int ret = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 995 | |
| 996 | DPRINT_ENTER(VMBUS_DRV); |
| 997 | |
| 998 | DPRINT_INFO(VMBUS_DRV, |
| 999 | "Vmbus initializing.... current log level 0x%x (%x,%x)", |
| 1000 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 1001 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1002 | |
Greg Kroah-Hartman | c22090f | 2010-02-25 16:43:15 -0800 | [diff] [blame] | 1003 | if (!dmi_check_system(microsoft_hv_dmi_table)) |
| 1004 | return -ENODEV; |
| 1005 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1006 | ret = vmbus_bus_init(VmbusInitialize); |
| 1007 | |
| 1008 | DPRINT_EXIT(VMBUS_DRV); |
| 1009 | return ret; |
| 1010 | } |
| 1011 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1012 | static void __exit vmbus_exit(void) |
| 1013 | { |
| 1014 | DPRINT_ENTER(VMBUS_DRV); |
| 1015 | |
| 1016 | vmbus_bus_exit(); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 1017 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1018 | DPRINT_EXIT(VMBUS_DRV); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1019 | return; |
| 1020 | } |
| 1021 | |
Greg Kroah-Hartman | 9a775db | 2010-02-25 16:42:10 -0800 | [diff] [blame] | 1022 | /* |
| 1023 | * We use a PCI table to determine if we should autoload this driver This is |
| 1024 | * needed by distro tools to determine if the hyperv drivers should be |
| 1025 | * installed and/or configured. We don't do anything else with the table, but |
| 1026 | * it needs to be present. |
Greg Kroah-Hartman | 9a775db | 2010-02-25 16:42:10 -0800 | [diff] [blame] | 1027 | */ |
| 1028 | const static struct pci_device_id microsoft_hv_pci_table[] = { |
| 1029 | { PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */ |
| 1030 | { 0 } |
| 1031 | }; |
| 1032 | MODULE_DEVICE_TABLE(pci, microsoft_hv_pci_table); |
| 1033 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 1034 | MODULE_LICENSE("GPL"); |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 1035 | MODULE_VERSION(HV_DRV_VERSION); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1036 | module_param(vmbus_irq, int, S_IRUGO); |
| 1037 | module_param(vmbus_loglevel, int, S_IRUGO); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1038 | |
| 1039 | module_init(vmbus_init); |
| 1040 | module_exit(vmbus_exit); |