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; |
Greg Kroah-Hartman | caf26a3 | 2009-08-19 16:17:03 -0700 | [diff] [blame] | 510 | memcpy(&child_device_obj->deviceType, &type, sizeof(struct hv_guid)); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 511 | memcpy(&child_device_obj->deviceInstance, &instance, |
| 512 | sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 513 | |
Greg Kroah-Hartman | caf26a3 | 2009-08-19 16:17:03 -0700 | [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 | |
| 540 | /* Make sure we are not registered already */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 541 | if (strlen(dev_name(&child_device_ctx->device)) != 0) { |
| 542 | DPRINT_ERR(VMBUS_DRV, |
| 543 | "child device (%p) already registered - busid %s", |
| 544 | child_device_ctx, |
| 545 | dev_name(&child_device_ctx->device)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 546 | |
| 547 | ret = -1; |
| 548 | goto Cleanup; |
| 549 | } |
| 550 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 551 | /* Set the device bus id. Otherwise, device_register()will fail. */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 552 | dev_set_name(&child_device_ctx->device, "vmbus_0_%d", |
| 553 | atomic_inc_return(&device_num)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 554 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 555 | /* The new device belongs to this bus */ |
| 556 | child_device_ctx->device.bus = &g_vmbus_drv.bus; /* device->dev.bus; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 557 | child_device_ctx->device.parent = &root_device_ctx->device; |
| 558 | child_device_ctx->device.release = vmbus_device_release; |
| 559 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 560 | /* |
| 561 | * Register with the LDM. This will kick off the driver/device |
| 562 | * binding...which will eventually call vmbus_match() and vmbus_probe() |
| 563 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 564 | ret = device_register(&child_device_ctx->device); |
| 565 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 566 | /* vmbus_probe() error does not get propergate to device_register(). */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 567 | ret = child_device_ctx->probe_error; |
| 568 | |
| 569 | if (ret) |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 570 | DPRINT_ERR(VMBUS_DRV, "unable to register child device (%p)", |
| 571 | &child_device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 572 | else |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 573 | DPRINT_INFO(VMBUS_DRV, "child device (%p) registered", |
| 574 | &child_device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 575 | |
| 576 | Cleanup: |
| 577 | DPRINT_EXIT(VMBUS_DRV); |
| 578 | |
| 579 | return ret; |
| 580 | } |
| 581 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 582 | /** |
| 583 | * vmbus_child_device_unregister - Remove the specified child device from the vmbus. |
| 584 | */ |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 585 | static void vmbus_child_device_unregister(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 586 | { |
| 587 | struct device_context *device_ctx = to_device_context(device_obj); |
| 588 | |
| 589 | DPRINT_ENTER(VMBUS_DRV); |
| 590 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 591 | DPRINT_INFO(VMBUS_DRV, "unregistering child device (%p)", |
| 592 | &device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 593 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 594 | /* |
| 595 | * Kick off the process of unregistering the device. |
| 596 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 597 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 598 | device_unregister(&device_ctx->device); |
| 599 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 600 | DPRINT_INFO(VMBUS_DRV, "child device (%p) unregistered", |
| 601 | &device_ctx->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 602 | |
| 603 | DPRINT_EXIT(VMBUS_DRV); |
| 604 | } |
| 605 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 606 | /** |
| 607 | * vmbus_child_device_destroy - Destroy the specified child device on the vmbus. |
| 608 | */ |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 609 | static void vmbus_child_device_destroy(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 610 | { |
| 611 | DPRINT_ENTER(VMBUS_DRV); |
| 612 | |
| 613 | DPRINT_EXIT(VMBUS_DRV); |
| 614 | } |
| 615 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 616 | /** |
| 617 | * vmbus_uevent - add uevent for our device |
| 618 | * |
| 619 | * This routine is invoked when a device is added or removed on the vmbus to |
| 620 | * generate a uevent to udev in the userspace. The udev will then look at its |
| 621 | * rule and the uevent generated here to load the appropriate driver |
| 622 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 623 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
| 624 | { |
| 625 | struct device_context *device_ctx = device_to_device_context(device); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 626 | int i = 0; |
| 627 | int len = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 628 | int ret; |
| 629 | |
| 630 | DPRINT_ENTER(VMBUS_DRV); |
| 631 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 632 | DPRINT_INFO(VMBUS_DRV, "generating uevent - VMBUS_DEVICE_CLASS_GUID={" |
| 633 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 634 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
| 635 | device_ctx->class_id.data[3], device_ctx->class_id.data[2], |
| 636 | device_ctx->class_id.data[1], device_ctx->class_id.data[0], |
| 637 | device_ctx->class_id.data[5], device_ctx->class_id.data[4], |
| 638 | device_ctx->class_id.data[7], device_ctx->class_id.data[6], |
| 639 | device_ctx->class_id.data[8], device_ctx->class_id.data[9], |
| 640 | device_ctx->class_id.data[10], |
| 641 | device_ctx->class_id.data[11], |
| 642 | device_ctx->class_id.data[12], |
| 643 | device_ctx->class_id.data[13], |
| 644 | device_ctx->class_id.data[14], |
| 645 | device_ctx->class_id.data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 646 | |
| 647 | env->envp_idx = i; |
| 648 | env->buflen = len; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 649 | ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={" |
| 650 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 651 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
| 652 | device_ctx->class_id.data[3], |
| 653 | device_ctx->class_id.data[2], |
| 654 | device_ctx->class_id.data[1], |
| 655 | device_ctx->class_id.data[0], |
| 656 | device_ctx->class_id.data[5], |
| 657 | device_ctx->class_id.data[4], |
| 658 | device_ctx->class_id.data[7], |
| 659 | device_ctx->class_id.data[6], |
| 660 | device_ctx->class_id.data[8], |
| 661 | device_ctx->class_id.data[9], |
| 662 | device_ctx->class_id.data[10], |
| 663 | device_ctx->class_id.data[11], |
| 664 | device_ctx->class_id.data[12], |
| 665 | device_ctx->class_id.data[13], |
| 666 | device_ctx->class_id.data[14], |
| 667 | device_ctx->class_id.data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 668 | |
| 669 | if (ret) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 670 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 671 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 672 | ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={" |
| 673 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-" |
| 674 | "%02x%02x%02x%02x%02x%02x%02x%02x}", |
| 675 | device_ctx->device_id.data[3], |
| 676 | device_ctx->device_id.data[2], |
| 677 | device_ctx->device_id.data[1], |
| 678 | device_ctx->device_id.data[0], |
| 679 | device_ctx->device_id.data[5], |
| 680 | device_ctx->device_id.data[4], |
| 681 | device_ctx->device_id.data[7], |
| 682 | device_ctx->device_id.data[6], |
| 683 | device_ctx->device_id.data[8], |
| 684 | device_ctx->device_id.data[9], |
| 685 | device_ctx->device_id.data[10], |
| 686 | device_ctx->device_id.data[11], |
| 687 | device_ctx->device_id.data[12], |
| 688 | device_ctx->device_id.data[13], |
| 689 | device_ctx->device_id.data[14], |
| 690 | device_ctx->device_id.data[15]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 691 | if (ret) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 692 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 693 | |
| 694 | env->envp[env->envp_idx] = NULL; |
| 695 | |
| 696 | DPRINT_EXIT(VMBUS_DRV); |
| 697 | |
| 698 | return 0; |
| 699 | } |
| 700 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 701 | /** |
| 702 | * vmbus_match - Attempt to match the specified device to the specified driver |
| 703 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 704 | static int vmbus_match(struct device *device, struct device_driver *driver) |
| 705 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 706 | int match = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 707 | struct driver_context *driver_ctx = driver_to_driver_context(driver); |
| 708 | struct device_context *device_ctx = device_to_device_context(device); |
| 709 | |
| 710 | DPRINT_ENTER(VMBUS_DRV); |
| 711 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 712 | /* We found our driver ? */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 713 | if (memcmp(&device_ctx->class_id, &driver_ctx->class_id, |
| 714 | sizeof(struct hv_guid)) == 0) { |
| 715 | /* |
| 716 | * !! NOTE: The driver_ctx is not a vmbus_drv_ctx. We typecast |
| 717 | * it here to access the struct hv_driver field |
| 718 | */ |
| 719 | struct vmbus_driver_context *vmbus_drv_ctx = |
| 720 | (struct vmbus_driver_context *)driver_ctx; |
| 721 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 722 | device_ctx->device_obj.Driver = &vmbus_drv_ctx->drv_obj.Base; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 723 | DPRINT_INFO(VMBUS_DRV, |
| 724 | "device object (%p) set to driver object (%p)", |
| 725 | &device_ctx->device_obj, |
| 726 | device_ctx->device_obj.Driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 727 | |
| 728 | match = 1; |
| 729 | } |
| 730 | |
| 731 | DPRINT_EXIT(VMBUS_DRV); |
| 732 | |
| 733 | return match; |
| 734 | } |
| 735 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 736 | /** |
| 737 | * vmbus_probe_failed_cb - Callback when a driver probe failed in vmbus_probe() |
| 738 | * |
| 739 | * We need a callback because we cannot invoked device_unregister() inside |
| 740 | * vmbus_probe() since vmbus_probe() may be invoked inside device_register() |
| 741 | * i.e. we cannot call device_unregister() inside device_register() |
| 742 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 743 | static void vmbus_probe_failed_cb(struct work_struct *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 744 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 745 | struct device_context *device_ctx = (struct device_context *)context; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 746 | |
| 747 | DPRINT_ENTER(VMBUS_DRV); |
| 748 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 749 | /* |
| 750 | * Kick off the process of unregistering the device. |
| 751 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 752 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 753 | device_unregister(&device_ctx->device); |
| 754 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 755 | /* put_device(&device_ctx->device); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 756 | DPRINT_EXIT(VMBUS_DRV); |
| 757 | } |
| 758 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 759 | /** |
| 760 | * vmbus_probe - Add the new vmbus's child device |
| 761 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 762 | static int vmbus_probe(struct device *child_device) |
| 763 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 764 | int ret = 0; |
| 765 | struct driver_context *driver_ctx = |
| 766 | driver_to_driver_context(child_device->driver); |
| 767 | struct device_context *device_ctx = |
| 768 | device_to_device_context(child_device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 769 | |
| 770 | DPRINT_ENTER(VMBUS_DRV); |
| 771 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 772 | /* 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] | 773 | if (driver_ctx->probe) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 774 | ret = device_ctx->probe_error = driver_ctx->probe(child_device); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 775 | if (ret != 0) { |
| 776 | DPRINT_ERR(VMBUS_DRV, "probe() failed for device %s " |
| 777 | "(%p) on driver %s (%d)...", |
| 778 | dev_name(child_device), child_device, |
| 779 | child_device->driver->name, ret); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 780 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 781 | INIT_WORK(&device_ctx->probe_failed_work_item, |
| 782 | vmbus_probe_failed_cb); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 783 | schedule_work(&device_ctx->probe_failed_work_item); |
| 784 | } |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 785 | } else { |
| 786 | DPRINT_ERR(VMBUS_DRV, "probe() method not set for driver - %s", |
| 787 | child_device->driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 788 | ret = -1; |
| 789 | } |
| 790 | |
| 791 | DPRINT_EXIT(VMBUS_DRV); |
| 792 | return ret; |
| 793 | } |
| 794 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 795 | /** |
| 796 | * vmbus_remove - Remove a vmbus device |
| 797 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 798 | static int vmbus_remove(struct device *child_device) |
| 799 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 800 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 801 | struct driver_context *driver_ctx; |
| 802 | |
| 803 | DPRINT_ENTER(VMBUS_DRV); |
| 804 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 805 | /* Special case root bus device */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 806 | if (child_device->parent == NULL) { |
| 807 | /* |
| 808 | * No-op since it is statically defined and handle in |
| 809 | * vmbus_bus_exit() |
| 810 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 811 | DPRINT_EXIT(VMBUS_DRV); |
| 812 | return 0; |
| 813 | } |
| 814 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 815 | if (child_device->driver) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 816 | driver_ctx = driver_to_driver_context(child_device->driver); |
| 817 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 818 | /* |
| 819 | * Let the specific open-source driver handles the removal if |
| 820 | * it can |
| 821 | */ |
| 822 | if (driver_ctx->remove) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 823 | ret = driver_ctx->remove(child_device); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 824 | } else { |
| 825 | DPRINT_ERR(VMBUS_DRV, |
| 826 | "remove() method not set for driver - %s", |
| 827 | child_device->driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 828 | ret = -1; |
| 829 | } |
| 830 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 831 | |
| 832 | DPRINT_EXIT(VMBUS_DRV); |
| 833 | |
| 834 | return 0; |
| 835 | } |
| 836 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 837 | /** |
| 838 | * vmbus_shutdown - Shutdown a vmbus device |
| 839 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 840 | static void vmbus_shutdown(struct device *child_device) |
| 841 | { |
| 842 | struct driver_context *driver_ctx; |
| 843 | |
| 844 | DPRINT_ENTER(VMBUS_DRV); |
| 845 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 846 | /* Special case root bus device */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 847 | if (child_device->parent == NULL) { |
| 848 | /* |
| 849 | * No-op since it is statically defined and handle in |
| 850 | * vmbus_bus_exit() |
| 851 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 852 | DPRINT_EXIT(VMBUS_DRV); |
| 853 | return; |
| 854 | } |
| 855 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 856 | /* The device may not be attached yet */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 857 | if (!child_device->driver) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 858 | DPRINT_EXIT(VMBUS_DRV); |
| 859 | return; |
| 860 | } |
| 861 | |
| 862 | driver_ctx = driver_to_driver_context(child_device->driver); |
| 863 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 864 | /* Let the specific open-source driver handles the removal if it can */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 865 | if (driver_ctx->shutdown) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 866 | driver_ctx->shutdown(child_device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 867 | |
| 868 | DPRINT_EXIT(VMBUS_DRV); |
| 869 | |
| 870 | return; |
| 871 | } |
| 872 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 873 | /** |
| 874 | * vmbus_bus_release - Final callback release of the vmbus root device |
| 875 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 876 | static void vmbus_bus_release(struct device *device) |
| 877 | { |
| 878 | DPRINT_ENTER(VMBUS_DRV); |
Greg Kroah-Hartman | 689bf40 | 2009-09-01 20:12:58 -0700 | [diff] [blame] | 879 | /* FIXME */ |
| 880 | /* Empty release functions are a bug, or a major sign |
| 881 | * of a problem design, this MUST BE FIXED! */ |
| 882 | dev_err(device, "%s needs to be fixed!\n", __func__); |
| 883 | WARN_ON(1); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 884 | DPRINT_EXIT(VMBUS_DRV); |
| 885 | } |
| 886 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 887 | /** |
| 888 | * vmbus_device_release - Final callback release of the vmbus child device |
| 889 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 890 | static void vmbus_device_release(struct device *device) |
| 891 | { |
| 892 | struct device_context *device_ctx = device_to_device_context(device); |
| 893 | |
| 894 | DPRINT_ENTER(VMBUS_DRV); |
| 895 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 896 | /* vmbus_child_device_destroy(&device_ctx->device_obj); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 897 | kfree(device_ctx); |
| 898 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 899 | /* !!DO NOT REFERENCE device_ctx anymore at this point!! */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 900 | DPRINT_EXIT(VMBUS_DRV); |
| 901 | |
| 902 | return; |
| 903 | } |
| 904 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 905 | /** |
| 906 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor messages |
| 907 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 908 | static void vmbus_msg_dpc(unsigned long data) |
| 909 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 910 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 911 | |
| 912 | DPRINT_ENTER(VMBUS_DRV); |
| 913 | |
| 914 | ASSERT(vmbus_drv_obj->OnMsgDpc != NULL); |
| 915 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 916 | /* Call to bus driver to handle interrupt */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 917 | vmbus_drv_obj->OnMsgDpc(&vmbus_drv_obj->Base); |
| 918 | |
| 919 | DPRINT_EXIT(VMBUS_DRV); |
| 920 | } |
| 921 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 922 | /** |
| 923 | * vmbus_msg_dpc - Tasklet routine to handle hypervisor events |
| 924 | */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 925 | static void vmbus_event_dpc(unsigned long data) |
| 926 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 927 | struct vmbus_driver *vmbus_drv_obj = (struct vmbus_driver *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 928 | |
| 929 | DPRINT_ENTER(VMBUS_DRV); |
| 930 | |
| 931 | ASSERT(vmbus_drv_obj->OnEventDpc != NULL); |
| 932 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 933 | /* Call to bus driver to handle interrupt */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 934 | vmbus_drv_obj->OnEventDpc(&vmbus_drv_obj->Base); |
| 935 | |
| 936 | DPRINT_EXIT(VMBUS_DRV); |
| 937 | } |
| 938 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 939 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 940 | { |
Greg Kroah-Hartman | ee3d7dd | 2009-08-20 12:17:36 -0700 | [diff] [blame] | 941 | struct vmbus_driver *vmbus_driver_obj = &g_vmbus_drv.drv_obj; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 942 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 943 | |
| 944 | DPRINT_ENTER(VMBUS_DRV); |
| 945 | |
| 946 | ASSERT(vmbus_driver_obj->OnIsr != NULL); |
| 947 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 948 | /* Call to bus driver to handle interrupt */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 949 | ret = vmbus_driver_obj->OnIsr(&vmbus_driver_obj->Base); |
| 950 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 951 | /* Schedules a dpc if necessary */ |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 952 | if (ret > 0) { |
| 953 | if (test_bit(0, (unsigned long *)&ret)) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 954 | tasklet_schedule(&g_vmbus_drv.msg_dpc); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 955 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 956 | if (test_bit(1, (unsigned long *)&ret)) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 957 | tasklet_schedule(&g_vmbus_drv.event_dpc); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 958 | |
| 959 | DPRINT_EXIT(VMBUS_DRV); |
| 960 | return IRQ_HANDLED; |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 961 | } else { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 962 | DPRINT_EXIT(VMBUS_DRV); |
| 963 | return IRQ_NONE; |
| 964 | } |
| 965 | } |
| 966 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 967 | static int __init vmbus_init(void) |
| 968 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 969 | int ret = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 970 | |
| 971 | DPRINT_ENTER(VMBUS_DRV); |
| 972 | |
| 973 | DPRINT_INFO(VMBUS_DRV, |
| 974 | "Vmbus initializing.... current log level 0x%x (%x,%x)", |
| 975 | vmbus_loglevel, HIWORD(vmbus_loglevel), LOWORD(vmbus_loglevel)); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 976 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 977 | |
| 978 | ret = vmbus_bus_init(VmbusInitialize); |
| 979 | |
| 980 | DPRINT_EXIT(VMBUS_DRV); |
| 981 | return ret; |
| 982 | } |
| 983 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 984 | static void __exit vmbus_exit(void) |
| 985 | { |
| 986 | DPRINT_ENTER(VMBUS_DRV); |
| 987 | |
| 988 | vmbus_bus_exit(); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 989 | /* Todo: it is used for loglevel, to be ported to new kernel. */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 990 | DPRINT_EXIT(VMBUS_DRV); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 991 | return; |
| 992 | } |
| 993 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 994 | MODULE_LICENSE("GPL"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 995 | module_param(vmbus_irq, int, S_IRUGO); |
| 996 | module_param(vmbus_loglevel, int, S_IRUGO); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 997 | |
| 998 | module_init(vmbus_init); |
| 999 | module_exit(vmbus_exit); |