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