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> |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 33 | #include <linux/completion.h> |
Greg Kroah-Hartman | 46a9719 | 2011-10-04 12:29:52 -0700 | [diff] [blame] | 34 | #include <linux/hyperv.h> |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 35 | #include <linux/kernel_stat.h> |
Greg Kroah-Hartman | 407dd16 | 2011-10-11 08:36:44 -0600 | [diff] [blame] | 36 | #include <asm/hyperv.h> |
Jason Wang | 1f94ea8 | 2012-08-31 13:32:44 +0800 | [diff] [blame] | 37 | #include <asm/hypervisor.h> |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 38 | #include <asm/mshyperv.h> |
K. Y. Srinivasan | 0f2a661 | 2011-05-12 19:34:28 -0700 | [diff] [blame] | 39 | #include "hyperv_vmbus.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 40 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 41 | static struct acpi_device *hv_acpi_dev; |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 42 | |
K. Y. Srinivasan | 59c0e4f | 2011-04-29 13:45:06 -0700 | [diff] [blame] | 43 | static struct tasklet_struct msg_dpc; |
K. Y. Srinivasan | 71a6655 | 2011-04-29 13:45:04 -0700 | [diff] [blame] | 44 | static struct completion probe_event; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 45 | static int irq; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 46 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 47 | static int vmbus_exists(void) |
| 48 | { |
| 49 | if (hv_acpi_dev == NULL) |
| 50 | return -ENODEV; |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 55 | #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2) |
| 56 | static void print_alias_name(struct hv_device *hv_dev, char *alias_name) |
| 57 | { |
| 58 | int i; |
| 59 | for (i = 0; i < VMBUS_ALIAS_LEN; i += 2) |
| 60 | sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]); |
| 61 | } |
| 62 | |
Greg Kroah-Hartman | 76c52bb | 2013-09-13 11:32:56 -0700 | [diff] [blame] | 63 | static u8 channel_monitor_group(struct vmbus_channel *channel) |
| 64 | { |
| 65 | return (u8)channel->offermsg.monitorid / 32; |
| 66 | } |
| 67 | |
| 68 | static u8 channel_monitor_offset(struct vmbus_channel *channel) |
| 69 | { |
| 70 | return (u8)channel->offermsg.monitorid % 32; |
| 71 | } |
| 72 | |
| 73 | static u32 channel_pending(struct vmbus_channel *channel, |
| 74 | struct hv_monitor_page *monitor_page) |
| 75 | { |
| 76 | u8 monitor_group = channel_monitor_group(channel); |
| 77 | return monitor_page->trigger_group[monitor_group].pending; |
| 78 | } |
| 79 | |
Greg Kroah-Hartman | 1cee272 | 2013-09-13 11:32:57 -0700 | [diff] [blame] | 80 | static u32 channel_latency(struct vmbus_channel *channel, |
| 81 | struct hv_monitor_page *monitor_page) |
| 82 | { |
| 83 | u8 monitor_group = channel_monitor_group(channel); |
| 84 | u8 monitor_offset = channel_monitor_offset(channel); |
| 85 | return monitor_page->latency[monitor_group][monitor_offset]; |
| 86 | } |
| 87 | |
Greg Kroah-Hartman | 4947c74 | 2013-09-13 11:32:58 -0700 | [diff] [blame] | 88 | static u32 channel_conn_id(struct vmbus_channel *channel, |
| 89 | struct hv_monitor_page *monitor_page) |
| 90 | { |
| 91 | u8 monitor_group = channel_monitor_group(channel); |
| 92 | u8 monitor_offset = channel_monitor_offset(channel); |
| 93 | return monitor_page->parameter[monitor_group][monitor_offset].connectionid.u.id; |
| 94 | } |
| 95 | |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 96 | static ssize_t id_show(struct device *dev, struct device_attribute *dev_attr, |
| 97 | char *buf) |
| 98 | { |
| 99 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 100 | |
| 101 | if (!hv_dev->channel) |
| 102 | return -ENODEV; |
| 103 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.child_relid); |
| 104 | } |
| 105 | static DEVICE_ATTR_RO(id); |
| 106 | |
Greg Kroah-Hartman | a8fb5f3 | 2013-09-13 11:32:50 -0700 | [diff] [blame] | 107 | static ssize_t state_show(struct device *dev, struct device_attribute *dev_attr, |
| 108 | char *buf) |
| 109 | { |
| 110 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 111 | |
| 112 | if (!hv_dev->channel) |
| 113 | return -ENODEV; |
| 114 | return sprintf(buf, "%d\n", hv_dev->channel->state); |
| 115 | } |
| 116 | static DEVICE_ATTR_RO(state); |
| 117 | |
Greg Kroah-Hartman | 5ffd00e | 2013-09-13 11:32:51 -0700 | [diff] [blame] | 118 | static ssize_t monitor_id_show(struct device *dev, |
| 119 | struct device_attribute *dev_attr, char *buf) |
| 120 | { |
| 121 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 122 | |
| 123 | if (!hv_dev->channel) |
| 124 | return -ENODEV; |
| 125 | return sprintf(buf, "%d\n", hv_dev->channel->offermsg.monitorid); |
| 126 | } |
| 127 | static DEVICE_ATTR_RO(monitor_id); |
| 128 | |
Greg Kroah-Hartman | 68234c0 | 2013-09-13 11:32:53 -0700 | [diff] [blame] | 129 | static ssize_t class_id_show(struct device *dev, |
| 130 | struct device_attribute *dev_attr, char *buf) |
| 131 | { |
| 132 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 133 | |
| 134 | if (!hv_dev->channel) |
| 135 | return -ENODEV; |
| 136 | return sprintf(buf, "{%pUl}\n", |
| 137 | hv_dev->channel->offermsg.offer.if_type.b); |
| 138 | } |
| 139 | static DEVICE_ATTR_RO(class_id); |
| 140 | |
Greg Kroah-Hartman | 7c55e1d | 2013-09-13 11:32:54 -0700 | [diff] [blame] | 141 | static ssize_t device_id_show(struct device *dev, |
| 142 | struct device_attribute *dev_attr, char *buf) |
| 143 | { |
| 144 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 145 | |
| 146 | if (!hv_dev->channel) |
| 147 | return -ENODEV; |
| 148 | return sprintf(buf, "{%pUl}\n", |
| 149 | hv_dev->channel->offermsg.offer.if_instance.b); |
| 150 | } |
| 151 | static DEVICE_ATTR_RO(device_id); |
| 152 | |
Greg Kroah-Hartman | 647fa37 | 2013-09-13 11:32:52 -0700 | [diff] [blame] | 153 | static ssize_t modalias_show(struct device *dev, |
| 154 | struct device_attribute *dev_attr, char *buf) |
| 155 | { |
| 156 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 157 | char alias_name[VMBUS_ALIAS_LEN + 1]; |
| 158 | |
| 159 | print_alias_name(hv_dev, alias_name); |
| 160 | return sprintf(buf, "vmbus:%s\n", alias_name); |
| 161 | } |
| 162 | static DEVICE_ATTR_RO(modalias); |
| 163 | |
Greg Kroah-Hartman | 76c52bb | 2013-09-13 11:32:56 -0700 | [diff] [blame] | 164 | static ssize_t server_monitor_pending_show(struct device *dev, |
| 165 | struct device_attribute *dev_attr, |
| 166 | char *buf) |
| 167 | { |
| 168 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 169 | |
| 170 | if (!hv_dev->channel) |
| 171 | return -ENODEV; |
| 172 | return sprintf(buf, "%d\n", |
| 173 | channel_pending(hv_dev->channel, |
| 174 | vmbus_connection.monitor_pages[1])); |
| 175 | } |
| 176 | static DEVICE_ATTR_RO(server_monitor_pending); |
| 177 | |
| 178 | static ssize_t client_monitor_pending_show(struct device *dev, |
| 179 | struct device_attribute *dev_attr, |
| 180 | char *buf) |
| 181 | { |
| 182 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 183 | |
| 184 | if (!hv_dev->channel) |
| 185 | return -ENODEV; |
| 186 | return sprintf(buf, "%d\n", |
| 187 | channel_pending(hv_dev->channel, |
| 188 | vmbus_connection.monitor_pages[1])); |
| 189 | } |
| 190 | static DEVICE_ATTR_RO(client_monitor_pending); |
Greg Kroah-Hartman | 68234c0 | 2013-09-13 11:32:53 -0700 | [diff] [blame] | 191 | |
Greg Kroah-Hartman | 1cee272 | 2013-09-13 11:32:57 -0700 | [diff] [blame] | 192 | static ssize_t server_monitor_latency_show(struct device *dev, |
| 193 | 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", |
| 201 | channel_latency(hv_dev->channel, |
| 202 | vmbus_connection.monitor_pages[0])); |
| 203 | } |
| 204 | static DEVICE_ATTR_RO(server_monitor_latency); |
| 205 | |
| 206 | static ssize_t client_monitor_latency_show(struct device *dev, |
| 207 | struct device_attribute *dev_attr, |
| 208 | char *buf) |
| 209 | { |
| 210 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 211 | |
| 212 | if (!hv_dev->channel) |
| 213 | return -ENODEV; |
| 214 | return sprintf(buf, "%d\n", |
| 215 | channel_latency(hv_dev->channel, |
| 216 | vmbus_connection.monitor_pages[1])); |
| 217 | } |
| 218 | static DEVICE_ATTR_RO(client_monitor_latency); |
| 219 | |
Greg Kroah-Hartman | 4947c74 | 2013-09-13 11:32:58 -0700 | [diff] [blame] | 220 | static ssize_t server_monitor_conn_id_show(struct device *dev, |
| 221 | struct device_attribute *dev_attr, |
| 222 | char *buf) |
| 223 | { |
| 224 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 225 | |
| 226 | if (!hv_dev->channel) |
| 227 | return -ENODEV; |
| 228 | return sprintf(buf, "%d\n", |
| 229 | channel_conn_id(hv_dev->channel, |
| 230 | vmbus_connection.monitor_pages[0])); |
| 231 | } |
| 232 | static DEVICE_ATTR_RO(server_monitor_conn_id); |
| 233 | |
| 234 | static ssize_t client_monitor_conn_id_show(struct device *dev, |
| 235 | struct device_attribute *dev_attr, |
| 236 | char *buf) |
| 237 | { |
| 238 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 239 | |
| 240 | if (!hv_dev->channel) |
| 241 | return -ENODEV; |
| 242 | return sprintf(buf, "%d\n", |
| 243 | channel_conn_id(hv_dev->channel, |
| 244 | vmbus_connection.monitor_pages[1])); |
| 245 | } |
| 246 | static DEVICE_ATTR_RO(client_monitor_conn_id); |
| 247 | |
Greg Kroah-Hartman | 98f4c651 | 2013-09-13 11:33:01 -0700 | [diff] [blame] | 248 | static ssize_t out_intr_mask_show(struct device *dev, |
| 249 | struct device_attribute *dev_attr, char *buf) |
| 250 | { |
| 251 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 252 | struct hv_ring_buffer_debug_info outbound; |
| 253 | |
| 254 | if (!hv_dev->channel) |
| 255 | return -ENODEV; |
| 256 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); |
| 257 | return sprintf(buf, "%d\n", outbound.current_interrupt_mask); |
| 258 | } |
| 259 | static DEVICE_ATTR_RO(out_intr_mask); |
| 260 | |
| 261 | static ssize_t out_read_index_show(struct device *dev, |
| 262 | struct device_attribute *dev_attr, char *buf) |
| 263 | { |
| 264 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 265 | struct hv_ring_buffer_debug_info outbound; |
| 266 | |
| 267 | if (!hv_dev->channel) |
| 268 | return -ENODEV; |
| 269 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); |
| 270 | return sprintf(buf, "%d\n", outbound.current_read_index); |
| 271 | } |
| 272 | static DEVICE_ATTR_RO(out_read_index); |
| 273 | |
| 274 | static ssize_t out_write_index_show(struct device *dev, |
| 275 | struct device_attribute *dev_attr, |
| 276 | char *buf) |
| 277 | { |
| 278 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 279 | struct hv_ring_buffer_debug_info outbound; |
| 280 | |
| 281 | if (!hv_dev->channel) |
| 282 | return -ENODEV; |
| 283 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); |
| 284 | return sprintf(buf, "%d\n", outbound.current_write_index); |
| 285 | } |
| 286 | static DEVICE_ATTR_RO(out_write_index); |
| 287 | |
| 288 | static ssize_t out_read_bytes_avail_show(struct device *dev, |
| 289 | struct device_attribute *dev_attr, |
| 290 | char *buf) |
| 291 | { |
| 292 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 293 | struct hv_ring_buffer_debug_info outbound; |
| 294 | |
| 295 | if (!hv_dev->channel) |
| 296 | return -ENODEV; |
| 297 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); |
| 298 | return sprintf(buf, "%d\n", outbound.bytes_avail_toread); |
| 299 | } |
| 300 | static DEVICE_ATTR_RO(out_read_bytes_avail); |
| 301 | |
| 302 | static ssize_t out_write_bytes_avail_show(struct device *dev, |
| 303 | struct device_attribute *dev_attr, |
| 304 | char *buf) |
| 305 | { |
| 306 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 307 | struct hv_ring_buffer_debug_info outbound; |
| 308 | |
| 309 | if (!hv_dev->channel) |
| 310 | return -ENODEV; |
| 311 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->outbound, &outbound); |
| 312 | return sprintf(buf, "%d\n", outbound.bytes_avail_towrite); |
| 313 | } |
| 314 | static DEVICE_ATTR_RO(out_write_bytes_avail); |
| 315 | |
| 316 | static ssize_t in_intr_mask_show(struct device *dev, |
| 317 | struct device_attribute *dev_attr, char *buf) |
| 318 | { |
| 319 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 320 | struct hv_ring_buffer_debug_info inbound; |
| 321 | |
| 322 | if (!hv_dev->channel) |
| 323 | return -ENODEV; |
| 324 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); |
| 325 | return sprintf(buf, "%d\n", inbound.current_interrupt_mask); |
| 326 | } |
| 327 | static DEVICE_ATTR_RO(in_intr_mask); |
| 328 | |
| 329 | static ssize_t in_read_index_show(struct device *dev, |
| 330 | struct device_attribute *dev_attr, char *buf) |
| 331 | { |
| 332 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 333 | struct hv_ring_buffer_debug_info inbound; |
| 334 | |
| 335 | if (!hv_dev->channel) |
| 336 | return -ENODEV; |
| 337 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); |
| 338 | return sprintf(buf, "%d\n", inbound.current_read_index); |
| 339 | } |
| 340 | static DEVICE_ATTR_RO(in_read_index); |
| 341 | |
| 342 | static ssize_t in_write_index_show(struct device *dev, |
| 343 | struct device_attribute *dev_attr, char *buf) |
| 344 | { |
| 345 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 346 | struct hv_ring_buffer_debug_info inbound; |
| 347 | |
| 348 | if (!hv_dev->channel) |
| 349 | return -ENODEV; |
| 350 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); |
| 351 | return sprintf(buf, "%d\n", inbound.current_write_index); |
| 352 | } |
| 353 | static DEVICE_ATTR_RO(in_write_index); |
| 354 | |
| 355 | static ssize_t in_read_bytes_avail_show(struct device *dev, |
| 356 | struct device_attribute *dev_attr, |
| 357 | char *buf) |
| 358 | { |
| 359 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 360 | struct hv_ring_buffer_debug_info inbound; |
| 361 | |
| 362 | if (!hv_dev->channel) |
| 363 | return -ENODEV; |
| 364 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); |
| 365 | return sprintf(buf, "%d\n", inbound.bytes_avail_toread); |
| 366 | } |
| 367 | static DEVICE_ATTR_RO(in_read_bytes_avail); |
| 368 | |
| 369 | static ssize_t in_write_bytes_avail_show(struct device *dev, |
| 370 | struct device_attribute *dev_attr, |
| 371 | char *buf) |
| 372 | { |
| 373 | struct hv_device *hv_dev = device_to_hv_device(dev); |
| 374 | struct hv_ring_buffer_debug_info inbound; |
| 375 | |
| 376 | if (!hv_dev->channel) |
| 377 | return -ENODEV; |
| 378 | hv_ringbuffer_get_debuginfo(&hv_dev->channel->inbound, &inbound); |
| 379 | return sprintf(buf, "%d\n", inbound.bytes_avail_towrite); |
| 380 | } |
| 381 | static DEVICE_ATTR_RO(in_write_bytes_avail); |
| 382 | |
| 383 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 384 | static struct attribute *vmbus_attrs[] = { |
| 385 | &dev_attr_id.attr, |
Greg Kroah-Hartman | a8fb5f3 | 2013-09-13 11:32:50 -0700 | [diff] [blame] | 386 | &dev_attr_state.attr, |
Greg Kroah-Hartman | 5ffd00e | 2013-09-13 11:32:51 -0700 | [diff] [blame] | 387 | &dev_attr_monitor_id.attr, |
Greg Kroah-Hartman | 68234c0 | 2013-09-13 11:32:53 -0700 | [diff] [blame] | 388 | &dev_attr_class_id.attr, |
Greg Kroah-Hartman | 7c55e1d | 2013-09-13 11:32:54 -0700 | [diff] [blame] | 389 | &dev_attr_device_id.attr, |
Greg Kroah-Hartman | 647fa37 | 2013-09-13 11:32:52 -0700 | [diff] [blame] | 390 | &dev_attr_modalias.attr, |
Greg Kroah-Hartman | 76c52bb | 2013-09-13 11:32:56 -0700 | [diff] [blame] | 391 | &dev_attr_server_monitor_pending.attr, |
| 392 | &dev_attr_client_monitor_pending.attr, |
Greg Kroah-Hartman | 1cee272 | 2013-09-13 11:32:57 -0700 | [diff] [blame] | 393 | &dev_attr_server_monitor_latency.attr, |
| 394 | &dev_attr_client_monitor_latency.attr, |
Greg Kroah-Hartman | 4947c74 | 2013-09-13 11:32:58 -0700 | [diff] [blame] | 395 | &dev_attr_server_monitor_conn_id.attr, |
| 396 | &dev_attr_client_monitor_conn_id.attr, |
Greg Kroah-Hartman | 98f4c651 | 2013-09-13 11:33:01 -0700 | [diff] [blame] | 397 | &dev_attr_out_intr_mask.attr, |
| 398 | &dev_attr_out_read_index.attr, |
| 399 | &dev_attr_out_write_index.attr, |
| 400 | &dev_attr_out_read_bytes_avail.attr, |
| 401 | &dev_attr_out_write_bytes_avail.attr, |
| 402 | &dev_attr_in_intr_mask.attr, |
| 403 | &dev_attr_in_read_index.attr, |
| 404 | &dev_attr_in_write_index.attr, |
| 405 | &dev_attr_in_read_bytes_avail.attr, |
| 406 | &dev_attr_in_write_bytes_avail.attr, |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 407 | NULL, |
| 408 | }; |
| 409 | ATTRIBUTE_GROUPS(vmbus); |
| 410 | |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 411 | /* |
| 412 | * vmbus_uevent - add uevent for our device |
| 413 | * |
| 414 | * This routine is invoked when a device is added or removed on the vmbus to |
| 415 | * generate a uevent to udev in the userspace. The udev will then look at its |
| 416 | * rule and the uevent generated here to load the appropriate driver |
K. Y. Srinivasan | 0ddda66 | 2011-08-25 09:48:38 -0700 | [diff] [blame] | 417 | * |
| 418 | * The alias string will be of the form vmbus:guid where guid is the string |
| 419 | * representation of the device guid (each byte of the guid will be |
| 420 | * represented with two hex characters. |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 421 | */ |
| 422 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
| 423 | { |
| 424 | struct hv_device *dev = device_to_hv_device(device); |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 425 | int ret; |
| 426 | char alias_name[VMBUS_ALIAS_LEN + 1]; |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 427 | |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 428 | print_alias_name(dev, alias_name); |
K. Y. Srinivasan | 0ddda66 | 2011-08-25 09:48:38 -0700 | [diff] [blame] | 429 | ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name); |
| 430 | return ret; |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 431 | } |
| 432 | |
K. Y. Srinivasan | 5841a82 | 2011-08-25 09:48:39 -0700 | [diff] [blame] | 433 | static uuid_le null_guid; |
| 434 | |
| 435 | static inline bool is_null_guid(const __u8 *guid) |
| 436 | { |
| 437 | if (memcmp(guid, &null_guid, sizeof(uuid_le))) |
| 438 | return false; |
| 439 | return true; |
| 440 | } |
| 441 | |
K. Y. Srinivasan | 3037a7b | 2011-09-13 10:59:37 -0700 | [diff] [blame] | 442 | /* |
| 443 | * Return a matching hv_vmbus_device_id pointer. |
| 444 | * If there is no match, return NULL. |
| 445 | */ |
| 446 | static const struct hv_vmbus_device_id *hv_vmbus_get_id( |
| 447 | const struct hv_vmbus_device_id *id, |
| 448 | __u8 *guid) |
| 449 | { |
| 450 | for (; !is_null_guid(id->guid); id++) |
| 451 | if (!memcmp(&id->guid, guid, sizeof(uuid_le))) |
| 452 | return id; |
| 453 | |
| 454 | return NULL; |
| 455 | } |
| 456 | |
| 457 | |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 458 | |
| 459 | /* |
| 460 | * vmbus_match - Attempt to match the specified device to the specified driver |
| 461 | */ |
| 462 | static int vmbus_match(struct device *device, struct device_driver *driver) |
| 463 | { |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 464 | struct hv_driver *drv = drv_to_hv_drv(driver); |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 465 | struct hv_device *hv_dev = device_to_hv_device(device); |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 466 | |
K. Y. Srinivasan | 3037a7b | 2011-09-13 10:59:37 -0700 | [diff] [blame] | 467 | if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b)) |
| 468 | return 1; |
K. Y. Srinivasan | de632a2 | 2011-04-26 09:20:24 -0700 | [diff] [blame] | 469 | |
K. Y. Srinivasan | 5841a82 | 2011-08-25 09:48:39 -0700 | [diff] [blame] | 470 | return 0; |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 471 | } |
| 472 | |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 473 | /* |
| 474 | * vmbus_probe - Add the new vmbus's child device |
| 475 | */ |
| 476 | static int vmbus_probe(struct device *child_device) |
| 477 | { |
| 478 | int ret = 0; |
| 479 | struct hv_driver *drv = |
| 480 | drv_to_hv_drv(child_device->driver); |
K. Y. Srinivasan | 9efd21e | 2011-04-29 13:45:10 -0700 | [diff] [blame] | 481 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 482 | const struct hv_vmbus_device_id *dev_id; |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 483 | |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 484 | 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] | 485 | if (drv->probe) { |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 486 | ret = drv->probe(dev, dev_id); |
K. Y. Srinivasan | b14a7b3 | 2011-04-29 13:45:03 -0700 | [diff] [blame] | 487 | if (ret != 0) |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 488 | pr_err("probe failed for device %s (%d)\n", |
| 489 | dev_name(child_device), ret); |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 490 | |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 491 | } else { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 492 | pr_err("probe not set for driver %s\n", |
| 493 | dev_name(child_device)); |
K. Y. Srinivasan | 6de925b | 2011-06-06 15:50:07 -0700 | [diff] [blame] | 494 | ret = -ENODEV; |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 495 | } |
| 496 | return ret; |
| 497 | } |
| 498 | |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 499 | /* |
| 500 | * vmbus_remove - Remove a vmbus device |
| 501 | */ |
| 502 | static int vmbus_remove(struct device *child_device) |
| 503 | { |
K. Y. Srinivasan | d437217 | 2011-09-13 10:59:44 -0700 | [diff] [blame] | 504 | struct hv_driver *drv = drv_to_hv_drv(child_device->driver); |
K. Y. Srinivasan | 415b023 | 2011-04-29 13:45:12 -0700 | [diff] [blame] | 505 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 506 | |
K. Y. Srinivasan | d437217 | 2011-09-13 10:59:44 -0700 | [diff] [blame] | 507 | if (drv->remove) |
| 508 | drv->remove(dev); |
| 509 | else |
| 510 | pr_err("remove not set for driver %s\n", |
| 511 | dev_name(child_device)); |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 516 | |
| 517 | /* |
| 518 | * vmbus_shutdown - Shutdown a vmbus device |
| 519 | */ |
| 520 | static void vmbus_shutdown(struct device *child_device) |
| 521 | { |
| 522 | struct hv_driver *drv; |
K. Y. Srinivasan | ca6887f | 2011-04-29 13:45:14 -0700 | [diff] [blame] | 523 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 524 | |
| 525 | |
| 526 | /* The device may not be attached yet */ |
| 527 | if (!child_device->driver) |
| 528 | return; |
| 529 | |
| 530 | drv = drv_to_hv_drv(child_device->driver); |
| 531 | |
K. Y. Srinivasan | ca6887f | 2011-04-29 13:45:14 -0700 | [diff] [blame] | 532 | if (drv->shutdown) |
| 533 | drv->shutdown(dev); |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 534 | |
| 535 | return; |
| 536 | } |
| 537 | |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 538 | |
| 539 | /* |
| 540 | * vmbus_device_release - Final callback release of the vmbus child device |
| 541 | */ |
| 542 | static void vmbus_device_release(struct device *device) |
| 543 | { |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 544 | struct hv_device *hv_dev = device_to_hv_device(device); |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 545 | |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 546 | kfree(hv_dev); |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 547 | |
| 548 | } |
| 549 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 550 | /* The one and only one */ |
K. Y. Srinivasan | 9adcac5 | 2011-04-29 13:45:08 -0700 | [diff] [blame] | 551 | static struct bus_type hv_bus = { |
| 552 | .name = "vmbus", |
| 553 | .match = vmbus_match, |
| 554 | .shutdown = vmbus_shutdown, |
| 555 | .remove = vmbus_remove, |
| 556 | .probe = vmbus_probe, |
| 557 | .uevent = vmbus_uevent, |
Greg Kroah-Hartman | 03f3a91 | 2013-09-13 11:32:49 -0700 | [diff] [blame] | 558 | .dev_groups = vmbus_groups, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 559 | }; |
| 560 | |
Haiyang Zhang | adf874c | 2011-01-26 12:12:09 -0800 | [diff] [blame] | 561 | static const char *driver_name = "hyperv"; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 562 | |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 563 | |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 564 | struct onmessage_work_context { |
| 565 | struct work_struct work; |
| 566 | struct hv_message msg; |
| 567 | }; |
| 568 | |
| 569 | static void vmbus_onmessage_work(struct work_struct *work) |
| 570 | { |
| 571 | struct onmessage_work_context *ctx; |
| 572 | |
| 573 | ctx = container_of(work, struct onmessage_work_context, |
| 574 | work); |
| 575 | vmbus_onmessage(&ctx->msg); |
| 576 | kfree(ctx); |
| 577 | } |
| 578 | |
K. Y. Srinivasan | 62c1059 | 2011-03-10 14:04:53 -0800 | [diff] [blame] | 579 | static void vmbus_on_msg_dpc(unsigned long data) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 580 | { |
| 581 | int cpu = smp_processor_id(); |
| 582 | void *page_addr = hv_context.synic_message_page[cpu]; |
| 583 | struct hv_message *msg = (struct hv_message *)page_addr + |
| 584 | VMBUS_MESSAGE_SINT; |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 585 | struct onmessage_work_context *ctx; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 586 | |
| 587 | while (1) { |
| 588 | if (msg->header.message_type == HVMSG_NONE) { |
| 589 | /* no msg */ |
| 590 | break; |
| 591 | } else { |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 592 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
| 593 | if (ctx == NULL) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 594 | continue; |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 595 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
| 596 | memcpy(&ctx->msg, msg, sizeof(*msg)); |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 597 | queue_work(vmbus_connection.work_queue, &ctx->work); |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 598 | } |
| 599 | |
| 600 | msg->header.message_type = HVMSG_NONE; |
| 601 | |
| 602 | /* |
| 603 | * Make sure the write to MessageType (ie set to |
| 604 | * HVMSG_NONE) happens before we read the |
| 605 | * MessagePending and EOMing. Otherwise, the EOMing |
| 606 | * will not deliver any more messages since there is |
| 607 | * no empty slot |
| 608 | */ |
Jason Wang | 35848f6 | 2013-06-18 13:04:23 +0800 | [diff] [blame] | 609 | mb(); |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 610 | |
| 611 | if (msg->header.message_flags.msg_pending) { |
| 612 | /* |
| 613 | * This will cause message queue rescan to |
| 614 | * possibly deliver another msg from the |
| 615 | * hypervisor |
| 616 | */ |
| 617 | wrmsrl(HV_X64_MSR_EOM, 0); |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 622 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 623 | { |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 624 | int cpu = smp_processor_id(); |
| 625 | void *page_addr; |
| 626 | struct hv_message *msg; |
| 627 | union hv_synic_event_flags *event; |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 628 | bool handled = false; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 629 | |
K. Y. Srinivasan | 5ab0595 | 2012-12-01 06:46:55 -0800 | [diff] [blame] | 630 | page_addr = hv_context.synic_event_page[cpu]; |
| 631 | if (page_addr == NULL) |
| 632 | return IRQ_NONE; |
| 633 | |
| 634 | event = (union hv_synic_event_flags *)page_addr + |
| 635 | VMBUS_MESSAGE_SINT; |
K. Y. Srinivasan | 7341d90 | 2011-08-31 14:35:56 -0700 | [diff] [blame] | 636 | /* |
| 637 | * Check for events before checking for messages. This is the order |
| 638 | * in which events and messages are checked in Windows guests on |
| 639 | * Hyper-V, and the Windows team suggested we do the same. |
| 640 | */ |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 641 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 642 | if ((vmbus_proto_version == VERSION_WS2008) || |
| 643 | (vmbus_proto_version == VERSION_WIN7)) { |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 644 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 645 | /* Since we are a child, we only need to check bit 0 */ |
| 646 | if (sync_test_and_clear_bit(0, |
| 647 | (unsigned long *) &event->flags32[0])) { |
| 648 | handled = true; |
| 649 | } |
| 650 | } else { |
| 651 | /* |
| 652 | * Our host is win8 or above. The signaling mechanism |
| 653 | * has changed and we can directly look at the event page. |
| 654 | * If bit n is set then we have an interrup on the channel |
| 655 | * whose id is n. |
| 656 | */ |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 657 | handled = true; |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 658 | } |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 659 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 660 | if (handled) |
K. Y. Srinivasan | db11f12 | 2012-12-01 06:46:53 -0800 | [diff] [blame] | 661 | tasklet_schedule(hv_context.event_dpc[cpu]); |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 662 | |
| 663 | |
K. Y. Srinivasan | 7341d90 | 2011-08-31 14:35:56 -0700 | [diff] [blame] | 664 | page_addr = hv_context.synic_message_page[cpu]; |
| 665 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
| 666 | |
| 667 | /* Check if there are actual msgs to be processed */ |
| 668 | if (msg->header.message_type != HVMSG_NONE) { |
| 669 | handled = true; |
| 670 | tasklet_schedule(&msg_dpc); |
| 671 | } |
| 672 | |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 673 | if (handled) |
| 674 | return IRQ_HANDLED; |
| 675 | else |
| 676 | return IRQ_NONE; |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 677 | } |
| 678 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 679 | /* |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 680 | * vmbus interrupt flow handler: |
| 681 | * vmbus interrupts can concurrently occur on multiple CPUs and |
| 682 | * can be handled concurrently. |
| 683 | */ |
| 684 | |
Fengguang Wu | 83ebf6e | 2013-01-18 09:09:32 +0800 | [diff] [blame] | 685 | 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] | 686 | { |
| 687 | kstat_incr_irqs_this_cpu(irq, desc); |
| 688 | |
| 689 | desc->action->handler(irq, desc->action->dev_id); |
| 690 | } |
| 691 | |
| 692 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 693 | * vmbus_bus_init -Main vmbus driver initialization routine. |
| 694 | * |
| 695 | * Here, we |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 696 | * - initialize the vmbus driver context |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 697 | * - invoke the vmbus hv main init routine |
| 698 | * - get the irq resource |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 699 | * - retrieve the channel offers |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 700 | */ |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 701 | static int vmbus_bus_init(int irq) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 702 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 703 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 704 | |
Greg Kroah-Hartman | 6d26e38fa2 | 2010-12-02 12:08:08 -0800 | [diff] [blame] | 705 | /* Hypervisor initialization...setup hypercall page..etc */ |
| 706 | ret = hv_init(); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 707 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 708 | pr_err("Unable to initialize the hypervisor - 0x%x\n", ret); |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 709 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 710 | } |
| 711 | |
K. Y. Srinivasan | 59c0e4f | 2011-04-29 13:45:06 -0700 | [diff] [blame] | 712 | tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 713 | |
K. Y. Srinivasan | 9adcac5 | 2011-04-29 13:45:08 -0700 | [diff] [blame] | 714 | ret = bus_register(&hv_bus); |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 715 | if (ret) |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 716 | goto err_cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 717 | |
Theodore Ts'o | 20ed3ef | 2012-07-17 13:50:30 -0400 | [diff] [blame] | 718 | ret = request_irq(irq, vmbus_isr, 0, driver_name, hv_acpi_dev); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 719 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 720 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 721 | pr_err("Unable to request IRQ %d\n", |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 722 | irq); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 723 | goto err_unregister; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 724 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 725 | |
K. Y. Srinivasan | b020950 | 2012-12-01 06:46:54 -0800 | [diff] [blame] | 726 | /* |
| 727 | * Vmbus interrupts can be handled concurrently on |
| 728 | * different CPUs. Establish an appropriate interrupt flow |
| 729 | * handler that can support this model. |
| 730 | */ |
| 731 | irq_set_handler(irq, vmbus_flow_handler); |
| 732 | |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 733 | /* |
| 734 | * Register our interrupt handler. |
| 735 | */ |
| 736 | hv_register_vmbus_handler(irq, vmbus_isr); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 737 | |
Jason Wang | 2608fb6 | 2013-06-19 11:28:10 +0800 | [diff] [blame] | 738 | ret = hv_synic_alloc(); |
| 739 | if (ret) |
| 740 | goto err_alloc; |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 741 | /* |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 742 | * Initialize the per-cpu interrupt state and |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 743 | * connect to the host. |
| 744 | */ |
K. Y. Srinivasan | 302a3c0 | 2013-02-17 11:30:44 -0800 | [diff] [blame] | 745 | on_each_cpu(hv_synic_init, NULL, 1); |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 746 | ret = vmbus_connect(); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 747 | if (ret) |
Jason Wang | 2608fb6 | 2013-06-19 11:28:10 +0800 | [diff] [blame] | 748 | goto err_alloc; |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 749 | |
Greg Kroah-Hartman | 2d6e882 | 2010-12-02 08:50:58 -0800 | [diff] [blame] | 750 | vmbus_request_offers(); |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 751 | |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 752 | return 0; |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 753 | |
Jason Wang | 2608fb6 | 2013-06-19 11:28:10 +0800 | [diff] [blame] | 754 | err_alloc: |
| 755 | hv_synic_free(); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 756 | free_irq(irq, hv_acpi_dev); |
| 757 | |
| 758 | err_unregister: |
| 759 | bus_unregister(&hv_bus); |
| 760 | |
| 761 | err_cleanup: |
| 762 | hv_cleanup(); |
| 763 | |
| 764 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 765 | } |
| 766 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 767 | /** |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 768 | * __vmbus_child_driver_register - Register a vmbus's driver |
| 769 | * @drv: Pointer to driver structure you want to register |
| 770 | * @owner: owner module of the drv |
| 771 | * @mod_name: module name string |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 772 | * |
| 773 | * Registers the given driver with Linux through the 'driver_register()' call |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 774 | * and sets up the hyper-v vmbus handling for this driver. |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 775 | * It will return the state of the 'driver_register()' call. |
| 776 | * |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 777 | */ |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 778 | 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] | 779 | { |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 780 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 781 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 782 | pr_info("registering driver %s\n", hv_driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 783 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 784 | ret = vmbus_exists(); |
| 785 | if (ret < 0) |
| 786 | return ret; |
| 787 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 788 | hv_driver->driver.name = hv_driver->name; |
| 789 | hv_driver->driver.owner = owner; |
| 790 | hv_driver->driver.mod_name = mod_name; |
| 791 | hv_driver->driver.bus = &hv_bus; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 792 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 793 | ret = driver_register(&hv_driver->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 794 | |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 795 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 796 | } |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 797 | EXPORT_SYMBOL_GPL(__vmbus_driver_register); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 798 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 799 | /** |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 800 | * vmbus_driver_unregister() - Unregister a vmbus's driver |
| 801 | * @drv: Pointer to driver structure you want to un-register |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 802 | * |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 803 | * Un-register the given driver that was previous registered with a call to |
| 804 | * vmbus_driver_register() |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 805 | */ |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 806 | void vmbus_driver_unregister(struct hv_driver *hv_driver) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 807 | { |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 808 | pr_info("unregistering driver %s\n", hv_driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 809 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 810 | if (!vmbus_exists()) |
K. Y. Srinivasan | 8f257a1 | 2011-12-27 13:49:37 -0800 | [diff] [blame] | 811 | driver_unregister(&hv_driver->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 812 | } |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 813 | EXPORT_SYMBOL_GPL(vmbus_driver_unregister); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 814 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 815 | /* |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 816 | * vmbus_device_create - Creates and registers a new child device |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 817 | * on the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 818 | */ |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 819 | struct hv_device *vmbus_device_create(uuid_le *type, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 820 | uuid_le *instance, |
Greg Kroah-Hartman | 89733aa | 2010-12-02 08:22:41 -0800 | [diff] [blame] | 821 | struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 822 | { |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 823 | struct hv_device *child_device_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 824 | |
K. Y. Srinivasan | 6bad88d | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 825 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
| 826 | if (!child_device_obj) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 827 | pr_err("Unable to allocate device object for child device\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 828 | return NULL; |
| 829 | } |
| 830 | |
Greg Kroah-Hartman | cae5b84 | 2010-10-21 09:05:27 -0700 | [diff] [blame] | 831 | child_device_obj->channel = channel; |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 832 | memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le)); |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 833 | memcpy(&child_device_obj->dev_instance, instance, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 834 | sizeof(uuid_le)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 835 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 836 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 837 | return child_device_obj; |
| 838 | } |
| 839 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 840 | /* |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 841 | * vmbus_device_register - Register the child device |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 842 | */ |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 843 | int vmbus_device_register(struct hv_device *child_device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 844 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 845 | int ret = 0; |
K. Y. Srinivasan | 6bad88d | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 846 | |
Bill Pemberton | f488841 | 2009-07-29 17:00:12 -0400 | [diff] [blame] | 847 | static atomic_t device_num = ATOMIC_INIT(0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 848 | |
K. Y. Srinivasan | 6bad88d | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 849 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 850 | atomic_inc_return(&device_num)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 851 | |
K. Y. Srinivasan | 0bce28b | 2011-08-27 11:31:39 -0700 | [diff] [blame] | 852 | child_device_obj->device.bus = &hv_bus; |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 853 | child_device_obj->device.parent = &hv_acpi_dev->dev; |
K. Y. Srinivasan | 6bad88d | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 854 | child_device_obj->device.release = vmbus_device_release; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 855 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 856 | /* |
| 857 | * Register with the LDM. This will kick off the driver/device |
| 858 | * binding...which will eventually call vmbus_match() and vmbus_probe() |
| 859 | */ |
K. Y. Srinivasan | 6bad88d | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 860 | ret = device_register(&child_device_obj->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 861 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 862 | if (ret) |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 863 | pr_err("Unable to register child device\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 864 | else |
Fernando Soto | 8467236 | 2013-06-14 23:13:35 +0000 | [diff] [blame] | 865 | pr_debug("child device %s registered\n", |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 866 | dev_name(&child_device_obj->device)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 867 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 868 | return ret; |
| 869 | } |
| 870 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 871 | /* |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 872 | * vmbus_device_unregister - Remove the specified child device |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 873 | * from the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 874 | */ |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 875 | void vmbus_device_unregister(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 876 | { |
Fernando Soto | 8467236 | 2013-06-14 23:13:35 +0000 | [diff] [blame] | 877 | pr_debug("child device %s unregistered\n", |
| 878 | dev_name(&device_obj->device)); |
| 879 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 880 | /* |
| 881 | * Kick off the process of unregistering the device. |
| 882 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 883 | */ |
K. Y. Srinivasan | 6bad88d | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 884 | device_unregister(&device_obj->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 885 | } |
| 886 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 887 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 888 | /* |
| 889 | * VMBUS is an acpi enumerated device. Get the the IRQ information |
| 890 | * from DSDT. |
| 891 | */ |
| 892 | |
| 893 | static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) |
| 894 | { |
| 895 | |
| 896 | if (res->type == ACPI_RESOURCE_TYPE_IRQ) { |
| 897 | struct acpi_resource_irq *irqp; |
| 898 | irqp = &res->data.irq; |
| 899 | |
| 900 | *((unsigned int *)irq) = irqp->interrupts[0]; |
| 901 | } |
| 902 | |
| 903 | return AE_OK; |
| 904 | } |
| 905 | |
| 906 | static int vmbus_acpi_add(struct acpi_device *device) |
| 907 | { |
| 908 | acpi_status result; |
| 909 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 910 | hv_acpi_dev = device; |
| 911 | |
K. Y. Srinivasan | 0a4425b | 2011-08-27 11:31:38 -0700 | [diff] [blame] | 912 | result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, |
| 913 | vmbus_walk_resources, &irq); |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 914 | |
| 915 | if (ACPI_FAILURE(result)) { |
| 916 | complete(&probe_event); |
| 917 | return -ENODEV; |
| 918 | } |
| 919 | complete(&probe_event); |
| 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | static const struct acpi_device_id vmbus_acpi_device_ids[] = { |
| 924 | {"VMBUS", 0}, |
K. Y. Srinivasan | 9d7b18d | 2011-06-06 15:49:42 -0700 | [diff] [blame] | 925 | {"VMBus", 0}, |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 926 | {"", 0}, |
| 927 | }; |
| 928 | MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); |
| 929 | |
| 930 | static struct acpi_driver vmbus_acpi_driver = { |
| 931 | .name = "vmbus", |
| 932 | .ids = vmbus_acpi_device_ids, |
| 933 | .ops = { |
| 934 | .add = vmbus_acpi_add, |
| 935 | }, |
| 936 | }; |
| 937 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 938 | static int __init hv_acpi_init(void) |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 939 | { |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 940 | int ret, t; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 941 | |
Jason Wang | 1f94ea8 | 2012-08-31 13:32:44 +0800 | [diff] [blame] | 942 | if (x86_hyper != &x86_hyper_ms_hyperv) |
Jason Wang | 0592969 | 2012-08-17 18:52:43 +0800 | [diff] [blame] | 943 | return -ENODEV; |
| 944 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 945 | init_completion(&probe_event); |
| 946 | |
| 947 | /* |
| 948 | * Get irq resources first. |
| 949 | */ |
| 950 | |
K. Y. Srinivasan | 0246604 | 2011-06-06 15:49:40 -0700 | [diff] [blame] | 951 | ret = acpi_bus_register_driver(&vmbus_acpi_driver); |
| 952 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 953 | if (ret) |
| 954 | return ret; |
| 955 | |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 956 | t = wait_for_completion_timeout(&probe_event, 5*HZ); |
| 957 | if (t == 0) { |
| 958 | ret = -ETIMEDOUT; |
| 959 | goto cleanup; |
| 960 | } |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 961 | |
| 962 | if (irq <= 0) { |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 963 | ret = -ENODEV; |
| 964 | goto cleanup; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 965 | } |
| 966 | |
K. Y. Srinivasan | 91fd799 | 2011-06-16 13:16:38 -0700 | [diff] [blame] | 967 | ret = vmbus_bus_init(irq); |
| 968 | if (ret) |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 969 | goto cleanup; |
| 970 | |
| 971 | return 0; |
| 972 | |
| 973 | cleanup: |
| 974 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 975 | hv_acpi_dev = NULL; |
K. Y. Srinivasan | 91fd799 | 2011-06-16 13:16:38 -0700 | [diff] [blame] | 976 | return ret; |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 977 | } |
| 978 | |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 979 | static void __exit vmbus_exit(void) |
| 980 | { |
| 981 | |
| 982 | free_irq(irq, hv_acpi_dev); |
| 983 | vmbus_free_channels(); |
| 984 | bus_unregister(&hv_bus); |
| 985 | hv_cleanup(); |
| 986 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
| 987 | } |
| 988 | |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 989 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 990 | MODULE_LICENSE("GPL"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 991 | |
K. Y. Srinivasan | 43d4e11 | 2011-10-24 11:28:12 -0700 | [diff] [blame] | 992 | subsys_initcall(hv_acpi_init); |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 993 | module_exit(vmbus_exit); |