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> |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 20 | * K. Y. Srinivasan <kys@microsoft.com> |
K. Y. Srinivasan | 52e5c1c | 2011-03-15 15:03:34 -0700 | [diff] [blame] | 21 | * |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 22 | */ |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 24 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 25 | #include <linux/init.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/irq.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/sysctl.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 32 | #include <linux/acpi.h> |
| 33 | #include <acpi/acpi_bus.h> |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 34 | #include <linux/completion.h> |
Greg Kroah-Hartman | 46a9719 | 2011-10-04 12:29:52 -0700 | [diff] [blame] | 35 | #include <linux/hyperv.h> |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 36 | #include <linux/kernel_stat.h> |
Greg Kroah-Hartman | 407dd16 | 2011-10-11 08:36:44 -0600 | [diff] [blame] | 37 | #include <asm/hyperv.h> |
Jason Wang | 1f94ea8 | 2012-08-31 13:32:44 +0800 | [diff] [blame] | 38 | #include <asm/hypervisor.h> |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 39 | #include <asm/mshyperv.h> |
K. Y. Srinivasan | 0f2a661 | 2011-05-12 19:34:28 -0700 | [diff] [blame] | 40 | #include "hyperv_vmbus.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 41 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 42 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 43 | static struct acpi_device *hv_acpi_dev; |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 44 | |
K. Y. Srinivasan | 59c0e4f | 2011-04-29 13:45:06 -0700 | [diff] [blame] | 45 | static struct tasklet_struct msg_dpc; |
K. Y. Srinivasan | 71a6655 | 2011-04-29 13:45:04 -0700 | [diff] [blame] | 46 | static struct completion probe_event; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 47 | static int irq; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 48 | |
Greg Kroah-Hartman | 15b80d6 | 2011-10-11 09:43:14 -0600 | [diff] [blame] | 49 | struct hv_device_info { |
Greg Kroah-Hartman | 15b80d6 | 2011-10-11 09:43:14 -0600 | [diff] [blame] | 50 | struct hv_dev_port_info inbound; |
| 51 | struct hv_dev_port_info outbound; |
| 52 | }; |
| 53 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 54 | static int vmbus_exists(void) |
| 55 | { |
| 56 | if (hv_acpi_dev == NULL) |
| 57 | return -ENODEV; |
| 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
Greg Kroah-Hartman | 15b80d6 | 2011-10-11 09:43:14 -0600 | [diff] [blame] | 62 | |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 63 | static void get_channel_info(struct hv_device *device, |
| 64 | struct hv_device_info *info) |
| 65 | { |
| 66 | struct vmbus_channel_debug_info debug_info; |
| 67 | |
| 68 | if (!device->channel) |
| 69 | return; |
| 70 | |
| 71 | vmbus_get_debug_info(device->channel, &debug_info); |
| 72 | |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 73 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
| 74 | info->inbound.read_idx = debug_info.inbound.current_read_index; |
| 75 | info->inbound.write_idx = debug_info.inbound.current_write_index; |
| 76 | info->inbound.bytes_avail_toread = |
| 77 | debug_info.inbound.bytes_avail_toread; |
| 78 | info->inbound.bytes_avail_towrite = |
| 79 | debug_info.inbound.bytes_avail_towrite; |
| 80 | |
| 81 | info->outbound.int_mask = |
| 82 | debug_info.outbound.current_interrupt_mask; |
| 83 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
| 84 | info->outbound.write_idx = debug_info.outbound.current_write_index; |
| 85 | info->outbound.bytes_avail_toread = |
| 86 | debug_info.outbound.bytes_avail_toread; |
| 87 | info->outbound.bytes_avail_towrite = |
| 88 | debug_info.outbound.bytes_avail_towrite; |
| 89 | } |
| 90 | |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 91 | #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2) |
| 92 | static void print_alias_name(struct hv_device *hv_dev, char *alias_name) |
| 93 | { |
| 94 | int i; |
| 95 | for (i = 0; i < VMBUS_ALIAS_LEN; i += 2) |
| 96 | sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]); |
| 97 | } |
| 98 | |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 99 | /* |
| 100 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
| 101 | * |
| 102 | * This is invoked when user does a |
| 103 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" |
| 104 | */ |
| 105 | static ssize_t vmbus_show_device_attr(struct device *dev, |
| 106 | struct device_attribute *dev_attr, |
| 107 | char *buf) |
| 108 | { |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 109 | struct hv_device *hv_dev = device_to_hv_device(dev); |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 110 | struct hv_device_info *device_info; |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 111 | int ret = 0; |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 112 | |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 113 | device_info = kzalloc(sizeof(struct hv_device_info), GFP_KERNEL); |
| 114 | if (!device_info) |
| 115 | return ret; |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 116 | |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 117 | get_channel_info(hv_dev, device_info); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 118 | |
Greg Kroah-Hartman | 7c55e1d | 2013-09-13 11:32:54 -0700 | [diff] [blame] | 119 | if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 120 | ret = sprintf(buf, "%d\n", device_info->outbound.int_mask); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 121 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 122 | ret = sprintf(buf, "%d\n", device_info->outbound.read_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 123 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 124 | ret = sprintf(buf, "%d\n", device_info->outbound.write_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 125 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 126 | ret = sprintf(buf, "%d\n", |
| 127 | device_info->outbound.bytes_avail_toread); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 128 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 129 | ret = sprintf(buf, "%d\n", |
| 130 | device_info->outbound.bytes_avail_towrite); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 131 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 132 | ret = sprintf(buf, "%d\n", device_info->inbound.int_mask); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 133 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 134 | ret = sprintf(buf, "%d\n", device_info->inbound.read_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 135 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 136 | ret = sprintf(buf, "%d\n", device_info->inbound.write_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 137 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 138 | ret = sprintf(buf, "%d\n", |
| 139 | device_info->inbound.bytes_avail_toread); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 140 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 141 | ret = sprintf(buf, "%d\n", |
| 142 | device_info->inbound.bytes_avail_towrite); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 143 | } |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 144 | |
| 145 | kfree(device_info); |
| 146 | return ret; |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Greg Kroah-Hartman | 76c52bb | 2013-09-13 11:32:56 -0700 | [diff] [blame] | 149 | static u8 channel_monitor_group(struct vmbus_channel *channel) |
| 150 | { |
| 151 | return (u8)channel->offermsg.monitorid / 32; |
| 152 | } |
| 153 | |
| 154 | static u8 channel_monitor_offset(struct vmbus_channel *channel) |
| 155 | { |
| 156 | return (u8)channel->offermsg.monitorid % 32; |
| 157 | } |
| 158 | |
| 159 | static u32 channel_pending(struct vmbus_channel *channel, |
| 160 | struct hv_monitor_page *monitor_page) |
| 161 | { |
| 162 | u8 monitor_group = channel_monitor_group(channel); |
| 163 | return monitor_page->trigger_group[monitor_group].pending; |
| 164 | } |
| 165 | |
Greg Kroah-Hartman | 1cee272 | 2013-09-13 11:32:57 -0700 | [diff] [blame] | 166 | static u32 channel_latency(struct vmbus_channel *channel, |
| 167 | struct hv_monitor_page *monitor_page) |
| 168 | { |
| 169 | u8 monitor_group = channel_monitor_group(channel); |
| 170 | u8 monitor_offset = channel_monitor_offset(channel); |
| 171 | return monitor_page->latency[monitor_group][monitor_offset]; |
| 172 | } |
| 173 | |
Greg Kroah-Hartman | 4947c74 | 2013-09-13 11:32:58 -0700 | [diff] [blame^] | 174 | static u32 channel_conn_id(struct vmbus_channel *channel, |
| 175 | struct hv_monitor_page *monitor_page) |
| 176 | { |
| 177 | u8 monitor_group = channel_monitor_group(channel); |
| 178 | u8 monitor_offset = channel_monitor_offset(channel); |
| 179 | return monitor_page->parameter[monitor_group][monitor_offset].connectionid.u.id; |
| 180 | } |
| 181 | |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 182 | static ssize_t id_show(struct device *dev, struct device_attribute *dev_attr, |
| 183 | char *buf) |
| 184 | { |
| 185 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 186 | |
| 187 | if (!hv_dev->channel) |
| 188 | return -ENODEV; |
| 189 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.child_relid); |
| 190 | } |
| 191 | static DEVICE_ATTR_RO(id); |
| 192 | |
Greg Kroah-Hartman | a8fb5f3 | 2013-09-13 11:32:50 -0700 | [diff] [blame] | 193 | static ssize_t state_show(struct device *dev, struct device_attribute *dev_attr, |
| 194 | char *buf) |
| 195 | { |
| 196 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 197 | |
| 198 | if (!hv_dev->channel) |
| 199 | return -ENODEV; |
| 200 | return sprintf(buf, "%d\n", hv_dev->channel->state); |
| 201 | } |
| 202 | static DEVICE_ATTR_RO(state); |
| 203 | |
Greg Kroah-Hartman | 5ffd00e | 2013-09-13 11:32:51 -0700 | [diff] [blame] | 204 | static ssize_t monitor_id_show(struct device *dev, |
| 205 | struct device_attribute *dev_attr, char *buf) |
| 206 | { |
| 207 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 208 | |
| 209 | if (!hv_dev->channel) |
| 210 | return -ENODEV; |
| 211 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.monitorid); |
| 212 | } |
| 213 | static DEVICE_ATTR_RO(monitor_id); |
| 214 | |
Greg Kroah-Hartman | 68234c0 | 2013-09-13 11:32:53 -0700 | [diff] [blame] | 215 | static ssize_t class_id_show(struct device *dev, |
| 216 | struct device_attribute *dev_attr, char *buf) |
| 217 | { |
| 218 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 219 | |
| 220 | if (!hv_dev->channel) |
| 221 | return -ENODEV; |
| 222 | return sprintf(buf, "{%pUl}\n", |
| 223 | hv_dev->channel->offermsg.offer.if_type.b); |
| 224 | } |
| 225 | static DEVICE_ATTR_RO(class_id); |
| 226 | |
Greg Kroah-Hartman | 7c55e1d | 2013-09-13 11:32:54 -0700 | [diff] [blame] | 227 | static ssize_t device_id_show(struct device *dev, |
| 228 | struct device_attribute *dev_attr, char *buf) |
| 229 | { |
| 230 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 231 | |
| 232 | if (!hv_dev->channel) |
| 233 | return -ENODEV; |
| 234 | return sprintf(buf, "{%pUl}\n", |
| 235 | hv_dev->channel->offermsg.offer.if_instance.b); |
| 236 | } |
| 237 | static DEVICE_ATTR_RO(device_id); |
| 238 | |
Greg Kroah-Hartman | 647fa37 | 2013-09-13 11:32:52 -0700 | [diff] [blame] | 239 | static ssize_t modalias_show(struct device *dev, |
| 240 | struct device_attribute *dev_attr, char *buf) |
| 241 | { |
| 242 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 243 | char alias_name[VMBUS_ALIAS_LEN + 1]; |
| 244 | |
| 245 | print_alias_name(hv_dev, alias_name); |
| 246 | return sprintf(buf, "vmbus:%s\n", alias_name); |
| 247 | } |
| 248 | static DEVICE_ATTR_RO(modalias); |
| 249 | |
Greg Kroah-Hartman | 76c52bb | 2013-09-13 11:32:56 -0700 | [diff] [blame] | 250 | static ssize_t server_monitor_pending_show(struct device *dev, |
| 251 | struct device_attribute *dev_attr, |
| 252 | char *buf) |
| 253 | { |
| 254 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 255 | |
| 256 | if (!hv_dev->channel) |
| 257 | return -ENODEV; |
| 258 | return sprintf(buf, "%d\n", |
| 259 | channel_pending(hv_dev->channel, |
| 260 | vmbus_connection.monitor_pages[1])); |
| 261 | } |
| 262 | static DEVICE_ATTR_RO(server_monitor_pending); |
| 263 | |
| 264 | static ssize_t client_monitor_pending_show(struct device *dev, |
| 265 | struct device_attribute *dev_attr, |
| 266 | char *buf) |
| 267 | { |
| 268 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 269 | |
| 270 | if (!hv_dev->channel) |
| 271 | return -ENODEV; |
| 272 | return sprintf(buf, "%d\n", |
| 273 | channel_pending(hv_dev->channel, |
| 274 | vmbus_connection.monitor_pages[1])); |
| 275 | } |
| 276 | static DEVICE_ATTR_RO(client_monitor_pending); |
Greg Kroah-Hartman | 68234c0 | 2013-09-13 11:32:53 -0700 | [diff] [blame] | 277 | |
Greg Kroah-Hartman | 1cee272 | 2013-09-13 11:32:57 -0700 | [diff] [blame] | 278 | static ssize_t server_monitor_latency_show(struct device *dev, |
| 279 | struct device_attribute *dev_attr, |
| 280 | char *buf) |
| 281 | { |
| 282 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 283 | |
| 284 | if (!hv_dev->channel) |
| 285 | return -ENODEV; |
| 286 | return sprintf(buf, "%d\n", |
| 287 | channel_latency(hv_dev->channel, |
| 288 | vmbus_connection.monitor_pages[0])); |
| 289 | } |
| 290 | static DEVICE_ATTR_RO(server_monitor_latency); |
| 291 | |
| 292 | static ssize_t client_monitor_latency_show(struct device *dev, |
| 293 | struct device_attribute *dev_attr, |
| 294 | char *buf) |
| 295 | { |
| 296 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 297 | |
| 298 | if (!hv_dev->channel) |
| 299 | return -ENODEV; |
| 300 | return sprintf(buf, "%d\n", |
| 301 | channel_latency(hv_dev->channel, |
| 302 | vmbus_connection.monitor_pages[1])); |
| 303 | } |
| 304 | static DEVICE_ATTR_RO(client_monitor_latency); |
| 305 | |
Greg Kroah-Hartman | 4947c74 | 2013-09-13 11:32:58 -0700 | [diff] [blame^] | 306 | static ssize_t server_monitor_conn_id_show(struct device *dev, |
| 307 | struct device_attribute *dev_attr, |
| 308 | char *buf) |
| 309 | { |
| 310 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 311 | |
| 312 | if (!hv_dev->channel) |
| 313 | return -ENODEV; |
| 314 | return sprintf(buf, "%d\n", |
| 315 | channel_conn_id(hv_dev->channel, |
| 316 | vmbus_connection.monitor_pages[0])); |
| 317 | } |
| 318 | static DEVICE_ATTR_RO(server_monitor_conn_id); |
| 319 | |
| 320 | static ssize_t client_monitor_conn_id_show(struct device *dev, |
| 321 | struct device_attribute *dev_attr, |
| 322 | char *buf) |
| 323 | { |
| 324 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 325 | |
| 326 | if (!hv_dev->channel) |
| 327 | return -ENODEV; |
| 328 | return sprintf(buf, "%d\n", |
| 329 | channel_conn_id(hv_dev->channel, |
| 330 | vmbus_connection.monitor_pages[1])); |
| 331 | } |
| 332 | static DEVICE_ATTR_RO(client_monitor_conn_id); |
| 333 | |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 334 | static struct attribute *vmbus_attrs[] = { |
| 335 | &dev_attr_id.attr, |
Greg Kroah-Hartman | a8fb5f3 | 2013-09-13 11:32:50 -0700 | [diff] [blame] | 336 | &dev_attr_state.attr, |
Greg Kroah-Hartman | 5ffd00e | 2013-09-13 11:32:51 -0700 | [diff] [blame] | 337 | &dev_attr_monitor_id.attr, |
Greg Kroah-Hartman | 68234c0 | 2013-09-13 11:32:53 -0700 | [diff] [blame] | 338 | &dev_attr_class_id.attr, |
Greg Kroah-Hartman | 7c55e1d | 2013-09-13 11:32:54 -0700 | [diff] [blame] | 339 | &dev_attr_device_id.attr, |
Greg Kroah-Hartman | 647fa37 | 2013-09-13 11:32:52 -0700 | [diff] [blame] | 340 | &dev_attr_modalias.attr, |
Greg Kroah-Hartman | 76c52bb | 2013-09-13 11:32:56 -0700 | [diff] [blame] | 341 | &dev_attr_server_monitor_pending.attr, |
| 342 | &dev_attr_client_monitor_pending.attr, |
Greg Kroah-Hartman | 1cee272 | 2013-09-13 11:32:57 -0700 | [diff] [blame] | 343 | &dev_attr_server_monitor_latency.attr, |
| 344 | &dev_attr_client_monitor_latency.attr, |
Greg Kroah-Hartman | 4947c74 | 2013-09-13 11:32:58 -0700 | [diff] [blame^] | 345 | &dev_attr_server_monitor_conn_id.attr, |
| 346 | &dev_attr_client_monitor_conn_id.attr, |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 347 | NULL, |
| 348 | }; |
| 349 | ATTRIBUTE_GROUPS(vmbus); |
| 350 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 351 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 352 | static struct device_attribute vmbus_device_attrs[] = { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 353 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), |
| 354 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 355 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 356 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 357 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 358 | |
| 359 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), |
| 360 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 361 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 362 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 363 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 364 | __ATTR_NULL |
| 365 | }; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 366 | |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 367 | |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 368 | /* |
| 369 | * vmbus_uevent - add uevent for our device |
| 370 | * |
| 371 | * This routine is invoked when a device is added or removed on the vmbus to |
| 372 | * generate a uevent to udev in the userspace. The udev will then look at its |
| 373 | * rule and the uevent generated here to load the appropriate driver |
K. Y. Srinivasan | 0ddda66 | 2011-08-25 09:48:38 -0700 | [diff] [blame] | 374 | * |
| 375 | * The alias string will be of the form vmbus:guid where guid is the string |
| 376 | * representation of the device guid (each byte of the guid will be |
| 377 | * represented with two hex characters. |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 378 | */ |
| 379 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
| 380 | { |
| 381 | struct hv_device *dev = device_to_hv_device(device); |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 382 | int ret; |
| 383 | char alias_name[VMBUS_ALIAS_LEN + 1]; |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 384 | |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 385 | print_alias_name(dev, alias_name); |
K. Y. Srinivasan | 0ddda66 | 2011-08-25 09:48:38 -0700 | [diff] [blame] | 386 | ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name); |
| 387 | return ret; |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 388 | } |
| 389 | |
K. Y. Srinivasan | 5841a82 | 2011-08-25 09:48:39 -0700 | [diff] [blame] | 390 | static uuid_le null_guid; |
| 391 | |
| 392 | static inline bool is_null_guid(const __u8 *guid) |
| 393 | { |
| 394 | if (memcmp(guid, &null_guid, sizeof(uuid_le))) |
| 395 | return false; |
| 396 | return true; |
| 397 | } |
| 398 | |
K. Y. Srinivasan | 3037a7b | 2011-09-13 10:59:37 -0700 | [diff] [blame] | 399 | /* |
| 400 | * Return a matching hv_vmbus_device_id pointer. |
| 401 | * If there is no match, return NULL. |
| 402 | */ |
| 403 | static const struct hv_vmbus_device_id *hv_vmbus_get_id( |
| 404 | const struct hv_vmbus_device_id *id, |
| 405 | __u8 *guid) |
| 406 | { |
| 407 | for (; !is_null_guid(id->guid); id++) |
| 408 | if (!memcmp(&id->guid, guid, sizeof(uuid_le))) |
| 409 | return id; |
| 410 | |
| 411 | return NULL; |
| 412 | } |
| 413 | |
| 414 | |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 415 | |
| 416 | /* |
| 417 | * vmbus_match - Attempt to match the specified device to the specified driver |
| 418 | */ |
| 419 | static int vmbus_match(struct device *device, struct device_driver *driver) |
| 420 | { |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 421 | struct hv_driver *drv = drv_to_hv_drv(driver); |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 422 | struct hv_device *hv_dev = device_to_hv_device(device); |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 423 | |
K. Y. Srinivasan | 3037a7b | 2011-09-13 10:59:37 -0700 | [diff] [blame] | 424 | if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b)) |
| 425 | return 1; |
K. Y. Srinivasan | de632a2 | 2011-04-26 09:20:24 -0700 | [diff] [blame] | 426 | |
K. Y. Srinivasan | 5841a82 | 2011-08-25 09:48:39 -0700 | [diff] [blame] | 427 | return 0; |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 428 | } |
| 429 | |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 430 | /* |
| 431 | * vmbus_probe - Add the new vmbus's child device |
| 432 | */ |
| 433 | static int vmbus_probe(struct device *child_device) |
| 434 | { |
| 435 | int ret = 0; |
| 436 | struct hv_driver *drv = |
| 437 | drv_to_hv_drv(child_device->driver); |
K. Y. Srinivasan | 9efd21e | 2011-04-29 13:45:10 -0700 | [diff] [blame] | 438 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 439 | const struct hv_vmbus_device_id *dev_id; |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 440 | |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 441 | dev_id = hv_vmbus_get_id(drv->id_table, dev->dev_type.b); |
K. Y. Srinivasan | 9efd21e | 2011-04-29 13:45:10 -0700 | [diff] [blame] | 442 | if (drv->probe) { |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 443 | ret = drv->probe(dev, dev_id); |
K. Y. Srinivasan | b14a7b3 | 2011-04-29 13:45:03 -0700 | [diff] [blame] | 444 | if (ret != 0) |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 445 | pr_err("probe failed for device %s (%d)\n", |
| 446 | dev_name(child_device), ret); |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 447 | |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 448 | } else { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 449 | pr_err("probe not set for driver %s\n", |
| 450 | dev_name(child_device)); |
K. Y. Srinivasan | 6de925b | 2011-06-06 15:50:07 -0700 | [diff] [blame] | 451 | ret = -ENODEV; |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 452 | } |
| 453 | return ret; |
| 454 | } |
| 455 | |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 456 | /* |
| 457 | * vmbus_remove - Remove a vmbus device |
| 458 | */ |
| 459 | static int vmbus_remove(struct device *child_device) |
| 460 | { |
K. Y. Srinivasan | d437217 | 2011-09-13 10:59:44 -0700 | [diff] [blame] | 461 | struct hv_driver *drv = drv_to_hv_drv(child_device->driver); |
K. Y. Srinivasan | 415b023 | 2011-04-29 13:45:12 -0700 | [diff] [blame] | 462 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 463 | |
K. Y. Srinivasan | d437217 | 2011-09-13 10:59:44 -0700 | [diff] [blame] | 464 | if (drv->remove) |
| 465 | drv->remove(dev); |
| 466 | else |
| 467 | pr_err("remove not set for driver %s\n", |
| 468 | dev_name(child_device)); |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 469 | |
| 470 | return 0; |
| 471 | } |
| 472 | |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 473 | |
| 474 | /* |
| 475 | * vmbus_shutdown - Shutdown a vmbus device |
| 476 | */ |
| 477 | static void vmbus_shutdown(struct device *child_device) |
| 478 | { |
| 479 | struct hv_driver *drv; |
K. Y. Srinivasan | ca6887f | 2011-04-29 13:45:14 -0700 | [diff] [blame] | 480 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 481 | |
| 482 | |
| 483 | /* The device may not be attached yet */ |
| 484 | if (!child_device->driver) |
| 485 | return; |
| 486 | |
| 487 | drv = drv_to_hv_drv(child_device->driver); |
| 488 | |
K. Y. Srinivasan | ca6887f | 2011-04-29 13:45:14 -0700 | [diff] [blame] | 489 | if (drv->shutdown) |
| 490 | drv->shutdown(dev); |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 491 | |
| 492 | return; |
| 493 | } |
| 494 | |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 495 | |
| 496 | /* |
| 497 | * vmbus_device_release - Final callback release of the vmbus child device |
| 498 | */ |
| 499 | static void vmbus_device_release(struct device *device) |
| 500 | { |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 501 | struct hv_device *hv_dev = device_to_hv_device(device); |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 502 | |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 503 | kfree(hv_dev); |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 504 | |
| 505 | } |
| 506 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 507 | /* The one and only one */ |
K. Y. Srinivasan | 9adcac5 | 2011-04-29 13:45:08 -0700 | [diff] [blame] | 508 | static struct bus_type hv_bus = { |
| 509 | .name = "vmbus", |
| 510 | .match = vmbus_match, |
| 511 | .shutdown = vmbus_shutdown, |
| 512 | .remove = vmbus_remove, |
| 513 | .probe = vmbus_probe, |
| 514 | .uevent = vmbus_uevent, |
| 515 | .dev_attrs = vmbus_device_attrs, |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 516 | .dev_groups = vmbus_groups, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 517 | }; |
| 518 | |
Haiyang Zhang | adf874c | 2011-01-26 12:12:09 -0800 | [diff] [blame] | 519 | static const char *driver_name = "hyperv"; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 520 | |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 521 | |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 522 | struct onmessage_work_context { |
| 523 | struct work_struct work; |
| 524 | struct hv_message msg; |
| 525 | }; |
| 526 | |
| 527 | static void vmbus_onmessage_work(struct work_struct *work) |
| 528 | { |
| 529 | struct onmessage_work_context *ctx; |
| 530 | |
| 531 | ctx = container_of(work, struct onmessage_work_context, |
| 532 | work); |
| 533 | vmbus_onmessage(&ctx->msg); |
| 534 | kfree(ctx); |
| 535 | } |
| 536 | |
K. Y. Srinivasan | 62c1059 | 2011-03-10 14:04:53 -0800 | [diff] [blame] | 537 | static void vmbus_on_msg_dpc(unsigned long data) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 538 | { |
| 539 | int cpu = smp_processor_id(); |
| 540 | void *page_addr = hv_context.synic_message_page[cpu]; |
| 541 | struct hv_message *msg = (struct hv_message *)page_addr + |
| 542 | VMBUS_MESSAGE_SINT; |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 543 | struct onmessage_work_context *ctx; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 544 | |
| 545 | while (1) { |
| 546 | if (msg->header.message_type == HVMSG_NONE) { |
| 547 | /* no msg */ |
| 548 | break; |
| 549 | } else { |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 550 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
| 551 | if (ctx == NULL) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 552 | continue; |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 553 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
| 554 | memcpy(&ctx->msg, msg, sizeof(*msg)); |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 555 | queue_work(vmbus_connection.work_queue, &ctx->work); |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | msg->header.message_type = HVMSG_NONE; |
| 559 | |
| 560 | /* |
| 561 | * Make sure the write to MessageType (ie set to |
| 562 | * HVMSG_NONE) happens before we read the |
| 563 | * MessagePending and EOMing. Otherwise, the EOMing |
| 564 | * will not deliver any more messages since there is |
| 565 | * no empty slot |
| 566 | */ |
Jason Wang | 35848f6 | 2013-06-18 13:04:23 +0800 | [diff] [blame] | 567 | mb(); |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 568 | |
| 569 | if (msg->header.message_flags.msg_pending) { |
| 570 | /* |
| 571 | * This will cause message queue rescan to |
| 572 | * possibly deliver another msg from the |
| 573 | * hypervisor |
| 574 | */ |
| 575 | wrmsrl(HV_X64_MSR_EOM, 0); |
| 576 | } |
| 577 | } |
| 578 | } |
| 579 | |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 580 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 581 | { |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 582 | int cpu = smp_processor_id(); |
| 583 | void *page_addr; |
| 584 | struct hv_message *msg; |
| 585 | union hv_synic_event_flags *event; |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 586 | bool handled = false; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 587 | |
K. Y. Srinivasan | 5ab0595 | 2012-12-01 06:46:55 -0800 | [diff] [blame] | 588 | page_addr = hv_context.synic_event_page[cpu]; |
| 589 | if (page_addr == NULL) |
| 590 | return IRQ_NONE; |
| 591 | |
| 592 | event = (union hv_synic_event_flags *)page_addr + |
| 593 | VMBUS_MESSAGE_SINT; |
K. Y. Srinivasan | 7341d90 | 2011-08-31 14:35:56 -0700 | [diff] [blame] | 594 | /* |
| 595 | * Check for events before checking for messages. This is the order |
| 596 | * in which events and messages are checked in Windows guests on |
| 597 | * Hyper-V, and the Windows team suggested we do the same. |
| 598 | */ |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 599 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 600 | if ((vmbus_proto_version == VERSION_WS2008) || |
| 601 | (vmbus_proto_version == VERSION_WIN7)) { |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 602 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 603 | /* Since we are a child, we only need to check bit 0 */ |
| 604 | if (sync_test_and_clear_bit(0, |
| 605 | (unsigned long *) &event->flags32[0])) { |
| 606 | handled = true; |
| 607 | } |
| 608 | } else { |
| 609 | /* |
| 610 | * Our host is win8 or above. The signaling mechanism |
| 611 | * has changed and we can directly look at the event page. |
| 612 | * If bit n is set then we have an interrup on the channel |
| 613 | * whose id is n. |
| 614 | */ |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 615 | handled = true; |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 616 | } |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 617 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 618 | if (handled) |
K. Y. Srinivasan | db11f12 | 2012-12-01 06:46:53 -0800 | [diff] [blame] | 619 | tasklet_schedule(hv_context.event_dpc[cpu]); |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 620 | |
| 621 | |
K. Y. Srinivasan | 7341d90 | 2011-08-31 14:35:56 -0700 | [diff] [blame] | 622 | page_addr = hv_context.synic_message_page[cpu]; |
| 623 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
| 624 | |
| 625 | /* Check if there are actual msgs to be processed */ |
| 626 | if (msg->header.message_type != HVMSG_NONE) { |
| 627 | handled = true; |
| 628 | tasklet_schedule(&msg_dpc); |
| 629 | } |
| 630 | |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 631 | if (handled) |
| 632 | return IRQ_HANDLED; |
| 633 | else |
| 634 | return IRQ_NONE; |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 635 | } |
| 636 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 637 | /* |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 638 | * vmbus interrupt flow handler: |
| 639 | * vmbus interrupts can concurrently occur on multiple CPUs and |
| 640 | * can be handled concurrently. |
| 641 | */ |
| 642 | |
Fengguang Wu | 83ebf6e | 2013-01-18 09:09:32 +0800 | [diff] [blame] | 643 | static void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc) |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 644 | { |
| 645 | kstat_incr_irqs_this_cpu(irq, desc); |
| 646 | |
| 647 | desc->action->handler(irq, desc->action->dev_id); |
| 648 | } |
| 649 | |
| 650 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 651 | * vmbus_bus_init -Main vmbus driver initialization routine. |
| 652 | * |
| 653 | * Here, we |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 654 | * - initialize the vmbus driver context |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 655 | * - invoke the vmbus hv main init routine |
| 656 | * - get the irq resource |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 657 | * - retrieve the channel offers |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 658 | */ |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 659 | static int vmbus_bus_init(int irq) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 660 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 661 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 662 | |
Greg Kroah-Hartman | 6d26e38fa2 | 2010-12-02 12:08:08 -0800 | [diff] [blame] | 663 | /* Hypervisor initialization...setup hypercall page..etc */ |
| 664 | ret = hv_init(); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 665 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 666 | pr_err("Unable to initialize the hypervisor - 0x%x\n", ret); |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 667 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 668 | } |
| 669 | |
K. Y. Srinivasan | 59c0e4f | 2011-04-29 13:45:06 -0700 | [diff] [blame] | 670 | tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 671 | |
K. Y. Srinivasan | 9adcac5 | 2011-04-29 13:45:08 -0700 | [diff] [blame] | 672 | ret = bus_register(&hv_bus); |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 673 | if (ret) |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 674 | goto err_cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 675 | |
Theodore Ts'o | 20ed3ef | 2012-07-17 13:50:30 -0400 | [diff] [blame] | 676 | ret = request_irq(irq, vmbus_isr, 0, driver_name, hv_acpi_dev); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 677 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 678 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 679 | pr_err("Unable to request IRQ %d\n", |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 680 | irq); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 681 | goto err_unregister; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 682 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 683 | |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 684 | /* |
| 685 | * Vmbus interrupts can be handled concurrently on |
| 686 | * different CPUs. Establish an appropriate interrupt flow |
| 687 | * handler that can support this model. |
| 688 | */ |
| 689 | irq_set_handler(irq, vmbus_flow_handler); |
| 690 | |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 691 | /* |
| 692 | * Register our interrupt handler. |
| 693 | */ |
| 694 | hv_register_vmbus_handler(irq, vmbus_isr); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 695 | |
Jason Wang | 2608fb6 | 2013-06-19 11:28:10 +0800 | [diff] [blame] | 696 | ret = hv_synic_alloc(); |
| 697 | if (ret) |
| 698 | goto err_alloc; |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 699 | /* |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 700 | * Initialize the per-cpu interrupt state and |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 701 | * connect to the host. |
| 702 | */ |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 703 | on_each_cpu(hv_synic_init, NULL, 1); |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 704 | ret = vmbus_connect(); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 705 | if (ret) |
Jason Wang | 2608fb6 | 2013-06-19 11:28:10 +0800 | [diff] [blame] | 706 | goto err_alloc; |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 707 | |
Greg Kroah-Hartman | 2d6e882 | 2010-12-02 08:50:58 -0800 | [diff] [blame] | 708 | vmbus_request_offers(); |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 709 | |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 710 | return 0; |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 711 | |
Jason Wang | 2608fb6 | 2013-06-19 11:28:10 +0800 | [diff] [blame] | 712 | err_alloc: |
| 713 | hv_synic_free(); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 714 | free_irq(irq, hv_acpi_dev); |
| 715 | |
| 716 | err_unregister: |
| 717 | bus_unregister(&hv_bus); |
| 718 | |
| 719 | err_cleanup: |
| 720 | hv_cleanup(); |
| 721 | |
| 722 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 723 | } |
| 724 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 725 | /** |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 726 | * __vmbus_child_driver_register - Register a vmbus's driver |
| 727 | * @drv: Pointer to driver structure you want to register |
| 728 | * @owner: owner module of the drv |
| 729 | * @mod_name: module name string |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 730 | * |
| 731 | * Registers the given driver with Linux through the 'driver_register()' call |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 732 | * and sets up the hyper-v vmbus handling for this driver. |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 733 | * It will return the state of the 'driver_register()' call. |
| 734 | * |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 735 | */ |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 736 | int __vmbus_driver_register(struct hv_driver *hv_driver, struct module *owner, const char *mod_name) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 737 | { |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 738 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 739 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 740 | pr_info("registering driver %s\n", hv_driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 741 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 742 | ret = vmbus_exists(); |
| 743 | if (ret < 0) |
| 744 | return ret; |
| 745 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 746 | hv_driver->driver.name = hv_driver->name; |
| 747 | hv_driver->driver.owner = owner; |
| 748 | hv_driver->driver.mod_name = mod_name; |
| 749 | hv_driver->driver.bus = &hv_bus; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 750 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 751 | ret = driver_register(&hv_driver->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 752 | |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 753 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 754 | } |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 755 | EXPORT_SYMBOL_GPL(__vmbus_driver_register); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 756 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 757 | /** |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 758 | * vmbus_driver_unregister() - Unregister a vmbus's driver |
| 759 | * @drv: Pointer to driver structure you want to un-register |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 760 | * |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 761 | * Un-register the given driver that was previous registered with a call to |
| 762 | * vmbus_driver_register() |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 763 | */ |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 764 | void vmbus_driver_unregister(struct hv_driver *hv_driver) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 765 | { |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 766 | pr_info("unregistering driver %s\n", hv_driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 767 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 768 | if (!vmbus_exists()) |
K. Y. Srinivasan | 8f257a1 | 2011-12-27 13:49:37 -0800 | [diff] [blame] | 769 | driver_unregister(&hv_driver->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 770 | } |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 771 | EXPORT_SYMBOL_GPL(vmbus_driver_unregister); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 772 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 773 | /* |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 774 | * vmbus_device_create - Creates and registers a new child device |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 775 | * on the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 776 | */ |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 777 | struct hv_device *vmbus_device_create(uuid_le *type, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 778 | uuid_le *instance, |
Greg Kroah-Hartman | 89733aa | 2010-12-02 08:22:41 -0800 | [diff] [blame] | 779 | struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 780 | { |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 781 | struct hv_device *child_device_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 782 | |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 783 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
| 784 | if (!child_device_obj) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 785 | pr_err("Unable to allocate device object for child device\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 786 | return NULL; |
| 787 | } |
| 788 | |
Greg Kroah-Hartman | cae5b84 | 2010-10-21 09:05:27 -0700 | [diff] [blame] | 789 | child_device_obj->channel = channel; |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 790 | memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le)); |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 791 | memcpy(&child_device_obj->dev_instance, instance, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 792 | sizeof(uuid_le)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 793 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 794 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 795 | return child_device_obj; |
| 796 | } |
| 797 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 798 | /* |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 799 | * vmbus_device_register - Register the child device |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 800 | */ |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 801 | int vmbus_device_register(struct hv_device *child_device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 802 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 803 | int ret = 0; |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 804 | |
Bill Pemberton | f488841 | 2009-07-29 17:00:12 -0400 | [diff] [blame] | 805 | static atomic_t device_num = ATOMIC_INIT(0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 806 | |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 807 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 808 | atomic_inc_return(&device_num)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 809 | |
K. Y. Srinivasan | 0bce28b | 2011-08-27 11:31:39 -0700 | [diff] [blame] | 810 | child_device_obj->device.bus = &hv_bus; |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 811 | child_device_obj->device.parent = &hv_acpi_dev->dev; |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 812 | child_device_obj->device.release = vmbus_device_release; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 813 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 814 | /* |
| 815 | * Register with the LDM. This will kick off the driver/device |
| 816 | * binding...which will eventually call vmbus_match() and vmbus_probe() |
| 817 | */ |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 818 | ret = device_register(&child_device_obj->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 819 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 820 | if (ret) |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 821 | pr_err("Unable to register child device\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 822 | else |
Fernando Soto | 8467236 | 2013-06-14 23:13:35 +0000 | [diff] [blame] | 823 | pr_debug("child device %s registered\n", |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 824 | dev_name(&child_device_obj->device)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 825 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 826 | return ret; |
| 827 | } |
| 828 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 829 | /* |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 830 | * vmbus_device_unregister - Remove the specified child device |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 831 | * from the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 832 | */ |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 833 | void vmbus_device_unregister(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 834 | { |
Fernando Soto | 8467236 | 2013-06-14 23:13:35 +0000 | [diff] [blame] | 835 | pr_debug("child device %s unregistered\n", |
| 836 | dev_name(&device_obj->device)); |
| 837 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 838 | /* |
| 839 | * Kick off the process of unregistering the device. |
| 840 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 841 | */ |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 842 | device_unregister(&device_obj->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 843 | } |
| 844 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 845 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 846 | /* |
| 847 | * VMBUS is an acpi enumerated device. Get the the IRQ information |
| 848 | * from DSDT. |
| 849 | */ |
| 850 | |
| 851 | static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) |
| 852 | { |
| 853 | |
| 854 | if (res->type == ACPI_RESOURCE_TYPE_IRQ) { |
| 855 | struct acpi_resource_irq *irqp; |
| 856 | irqp = &res->data.irq; |
| 857 | |
| 858 | *((unsigned int *)irq) = irqp->interrupts[0]; |
| 859 | } |
| 860 | |
| 861 | return AE_OK; |
| 862 | } |
| 863 | |
| 864 | static int vmbus_acpi_add(struct acpi_device *device) |
| 865 | { |
| 866 | acpi_status result; |
| 867 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 868 | hv_acpi_dev = device; |
| 869 | |
K. Y. Srinivasan | 0a4425b | 2011-08-27 11:31:38 -0700 | [diff] [blame] | 870 | result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, |
| 871 | vmbus_walk_resources, &irq); |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 872 | |
| 873 | if (ACPI_FAILURE(result)) { |
| 874 | complete(&probe_event); |
| 875 | return -ENODEV; |
| 876 | } |
| 877 | complete(&probe_event); |
| 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | static const struct acpi_device_id vmbus_acpi_device_ids[] = { |
| 882 | {"VMBUS", 0}, |
K. Y. Srinivasan | 9d7b18d | 2011-06-06 15:49:42 -0700 | [diff] [blame] | 883 | {"VMBus", 0}, |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 884 | {"", 0}, |
| 885 | }; |
| 886 | MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); |
| 887 | |
| 888 | static struct acpi_driver vmbus_acpi_driver = { |
| 889 | .name = "vmbus", |
| 890 | .ids = vmbus_acpi_device_ids, |
| 891 | .ops = { |
| 892 | .add = vmbus_acpi_add, |
| 893 | }, |
| 894 | }; |
| 895 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 896 | static int __init hv_acpi_init(void) |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 897 | { |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 898 | int ret, t; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 899 | |
Jason Wang | 1f94ea8 | 2012-08-31 13:32:44 +0800 | [diff] [blame] | 900 | if (x86_hyper != &x86_hyper_ms_hyperv) |
Jason Wang | 0592969 | 2012-08-17 18:52:43 +0800 | [diff] [blame] | 901 | return -ENODEV; |
| 902 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 903 | init_completion(&probe_event); |
| 904 | |
| 905 | /* |
| 906 | * Get irq resources first. |
| 907 | */ |
| 908 | |
K. Y. Srinivasan | 0246604 | 2011-06-06 15:49:40 -0700 | [diff] [blame] | 909 | ret = acpi_bus_register_driver(&vmbus_acpi_driver); |
| 910 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 911 | if (ret) |
| 912 | return ret; |
| 913 | |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 914 | t = wait_for_completion_timeout(&probe_event, 5*HZ); |
| 915 | if (t == 0) { |
| 916 | ret = -ETIMEDOUT; |
| 917 | goto cleanup; |
| 918 | } |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 919 | |
| 920 | if (irq <= 0) { |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 921 | ret = -ENODEV; |
| 922 | goto cleanup; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 923 | } |
| 924 | |
K. Y. Srinivasan | 91fd799 | 2011-06-16 13:16:38 -0700 | [diff] [blame] | 925 | ret = vmbus_bus_init(irq); |
| 926 | if (ret) |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 927 | goto cleanup; |
| 928 | |
| 929 | return 0; |
| 930 | |
| 931 | cleanup: |
| 932 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 933 | hv_acpi_dev = NULL; |
K. Y. Srinivasan | 91fd799 | 2011-06-16 13:16:38 -0700 | [diff] [blame] | 934 | return ret; |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 935 | } |
| 936 | |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 937 | static void __exit vmbus_exit(void) |
| 938 | { |
| 939 | |
| 940 | free_irq(irq, hv_acpi_dev); |
| 941 | vmbus_free_channels(); |
| 942 | bus_unregister(&hv_bus); |
| 943 | hv_cleanup(); |
| 944 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
| 945 | } |
| 946 | |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 947 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 948 | MODULE_LICENSE("GPL"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 949 | |
K. Y. Srinivasan | 43d4e11 | 2011-10-24 11:28:12 -0700 | [diff] [blame] | 950 | subsys_initcall(hv_acpi_init); |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 951 | module_exit(vmbus_exit); |