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> |
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 | 0f2a661 | 2011-05-12 19:34:28 -0700 | [diff] [blame] | 38 | #include "hyperv_vmbus.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 39 | |
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 | |
Greg Kroah-Hartman | 15b80d6 | 2011-10-11 09:43:14 -0600 | [diff] [blame] | 47 | struct hv_device_info { |
| 48 | u32 chn_id; |
| 49 | u32 chn_state; |
| 50 | uuid_le chn_type; |
| 51 | uuid_le chn_instance; |
| 52 | |
| 53 | u32 monitor_id; |
| 54 | u32 server_monitor_pending; |
| 55 | u32 server_monitor_latency; |
| 56 | u32 server_monitor_conn_id; |
| 57 | u32 client_monitor_pending; |
| 58 | u32 client_monitor_latency; |
| 59 | u32 client_monitor_conn_id; |
| 60 | |
| 61 | struct hv_dev_port_info inbound; |
| 62 | struct hv_dev_port_info outbound; |
| 63 | }; |
| 64 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 65 | static int vmbus_exists(void) |
| 66 | { |
| 67 | if (hv_acpi_dev == NULL) |
| 68 | return -ENODEV; |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
Greg Kroah-Hartman | 15b80d6 | 2011-10-11 09:43:14 -0600 | [diff] [blame] | 73 | |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 74 | static void get_channel_info(struct hv_device *device, |
| 75 | struct hv_device_info *info) |
| 76 | { |
| 77 | struct vmbus_channel_debug_info debug_info; |
| 78 | |
| 79 | if (!device->channel) |
| 80 | return; |
| 81 | |
| 82 | vmbus_get_debug_info(device->channel, &debug_info); |
| 83 | |
| 84 | info->chn_id = debug_info.relid; |
| 85 | info->chn_state = debug_info.state; |
| 86 | memcpy(&info->chn_type, &debug_info.interfacetype, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 87 | sizeof(uuid_le)); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 88 | memcpy(&info->chn_instance, &debug_info.interface_instance, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 89 | sizeof(uuid_le)); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 90 | |
| 91 | info->monitor_id = debug_info.monitorid; |
| 92 | |
| 93 | info->server_monitor_pending = debug_info.servermonitor_pending; |
| 94 | info->server_monitor_latency = debug_info.servermonitor_latency; |
| 95 | info->server_monitor_conn_id = debug_info.servermonitor_connectionid; |
| 96 | |
| 97 | info->client_monitor_pending = debug_info.clientmonitor_pending; |
| 98 | info->client_monitor_latency = debug_info.clientmonitor_latency; |
| 99 | info->client_monitor_conn_id = debug_info.clientmonitor_connectionid; |
| 100 | |
| 101 | info->inbound.int_mask = debug_info.inbound.current_interrupt_mask; |
| 102 | info->inbound.read_idx = debug_info.inbound.current_read_index; |
| 103 | info->inbound.write_idx = debug_info.inbound.current_write_index; |
| 104 | info->inbound.bytes_avail_toread = |
| 105 | debug_info.inbound.bytes_avail_toread; |
| 106 | info->inbound.bytes_avail_towrite = |
| 107 | debug_info.inbound.bytes_avail_towrite; |
| 108 | |
| 109 | info->outbound.int_mask = |
| 110 | debug_info.outbound.current_interrupt_mask; |
| 111 | info->outbound.read_idx = debug_info.outbound.current_read_index; |
| 112 | info->outbound.write_idx = debug_info.outbound.current_write_index; |
| 113 | info->outbound.bytes_avail_toread = |
| 114 | debug_info.outbound.bytes_avail_toread; |
| 115 | info->outbound.bytes_avail_towrite = |
| 116 | debug_info.outbound.bytes_avail_towrite; |
| 117 | } |
| 118 | |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 119 | #define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2) |
| 120 | static void print_alias_name(struct hv_device *hv_dev, char *alias_name) |
| 121 | { |
| 122 | int i; |
| 123 | for (i = 0; i < VMBUS_ALIAS_LEN; i += 2) |
| 124 | sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]); |
| 125 | } |
| 126 | |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 127 | /* |
| 128 | * vmbus_show_device_attr - Show the device attribute in sysfs. |
| 129 | * |
| 130 | * This is invoked when user does a |
| 131 | * "cat /sys/bus/vmbus/devices/<busdevice>/<attr name>" |
| 132 | */ |
| 133 | static ssize_t vmbus_show_device_attr(struct device *dev, |
| 134 | struct device_attribute *dev_attr, |
| 135 | char *buf) |
| 136 | { |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 137 | struct hv_device *hv_dev = device_to_hv_device(dev); |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 138 | struct hv_device_info *device_info; |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 139 | char alias_name[VMBUS_ALIAS_LEN + 1]; |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 140 | int ret = 0; |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 141 | |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 142 | device_info = kzalloc(sizeof(struct hv_device_info), GFP_KERNEL); |
| 143 | if (!device_info) |
| 144 | return ret; |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 145 | |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 146 | get_channel_info(hv_dev, device_info); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 147 | |
| 148 | if (!strcmp(dev_attr->attr.name, "class_id")) { |
K. Y. Srinivasan | 2221f6e | 2012-08-13 10:06:50 -0700 | [diff] [blame] | 149 | ret = sprintf(buf, "{%pUl}\n", device_info->chn_type.b); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 150 | } else if (!strcmp(dev_attr->attr.name, "device_id")) { |
K. Y. Srinivasan | 2221f6e | 2012-08-13 10:06:50 -0700 | [diff] [blame] | 151 | ret = sprintf(buf, "{%pUl}\n", device_info->chn_instance.b); |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 152 | } else if (!strcmp(dev_attr->attr.name, "modalias")) { |
| 153 | print_alias_name(hv_dev, alias_name); |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 154 | ret = sprintf(buf, "vmbus:%s\n", alias_name); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 155 | } else if (!strcmp(dev_attr->attr.name, "state")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 156 | ret = sprintf(buf, "%d\n", device_info->chn_state); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 157 | } else if (!strcmp(dev_attr->attr.name, "id")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 158 | ret = sprintf(buf, "%d\n", device_info->chn_id); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 159 | } else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 160 | ret = sprintf(buf, "%d\n", device_info->outbound.int_mask); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 161 | } else if (!strcmp(dev_attr->attr.name, "out_read_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 162 | ret = sprintf(buf, "%d\n", device_info->outbound.read_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 163 | } else if (!strcmp(dev_attr->attr.name, "out_write_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 164 | ret = sprintf(buf, "%d\n", device_info->outbound.write_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 165 | } else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 166 | ret = sprintf(buf, "%d\n", |
| 167 | device_info->outbound.bytes_avail_toread); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 168 | } else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 169 | ret = sprintf(buf, "%d\n", |
| 170 | device_info->outbound.bytes_avail_towrite); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 171 | } else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 172 | ret = sprintf(buf, "%d\n", device_info->inbound.int_mask); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 173 | } else if (!strcmp(dev_attr->attr.name, "in_read_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 174 | ret = sprintf(buf, "%d\n", device_info->inbound.read_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 175 | } else if (!strcmp(dev_attr->attr.name, "in_write_index")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 176 | ret = sprintf(buf, "%d\n", device_info->inbound.write_idx); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 177 | } else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 178 | ret = sprintf(buf, "%d\n", |
| 179 | device_info->inbound.bytes_avail_toread); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 180 | } else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 181 | ret = sprintf(buf, "%d\n", |
| 182 | device_info->inbound.bytes_avail_towrite); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 183 | } else if (!strcmp(dev_attr->attr.name, "monitor_id")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 184 | ret = sprintf(buf, "%d\n", device_info->monitor_id); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 185 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 186 | ret = sprintf(buf, "%d\n", device_info->server_monitor_pending); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 187 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 188 | ret = sprintf(buf, "%d\n", device_info->server_monitor_latency); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 189 | } else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 190 | ret = sprintf(buf, "%d\n", |
| 191 | device_info->server_monitor_conn_id); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 192 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 193 | ret = sprintf(buf, "%d\n", device_info->client_monitor_pending); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 194 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 195 | ret = sprintf(buf, "%d\n", device_info->client_monitor_latency); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 196 | } else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) { |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 197 | ret = sprintf(buf, "%d\n", |
| 198 | device_info->client_monitor_conn_id); |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 199 | } |
K. Y. Srinivasan | 7bb5238 | 2011-09-13 10:59:52 -0700 | [diff] [blame] | 200 | |
| 201 | kfree(device_info); |
| 202 | return ret; |
K. Y. Srinivasan | 98db433 | 2011-03-15 15:03:44 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 205 | /* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 206 | static struct device_attribute vmbus_device_attrs[] = { |
| 207 | __ATTR(id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 208 | __ATTR(state, S_IRUGO, vmbus_show_device_attr, NULL), |
| 209 | __ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 210 | __ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 211 | __ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL), |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 212 | __ATTR(modalias, S_IRUGO, vmbus_show_device_attr, NULL), |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 213 | |
| 214 | __ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), |
| 215 | __ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), |
| 216 | __ATTR(server_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 217 | |
| 218 | __ATTR(client_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL), |
| 219 | __ATTR(client_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL), |
| 220 | __ATTR(client_monitor_conn_id, S_IRUGO, vmbus_show_device_attr, NULL), |
| 221 | |
| 222 | __ATTR(out_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), |
| 223 | __ATTR(out_read_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 224 | __ATTR(out_write_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 225 | __ATTR(out_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 226 | __ATTR(out_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 227 | |
| 228 | __ATTR(in_intr_mask, S_IRUGO, vmbus_show_device_attr, NULL), |
| 229 | __ATTR(in_read_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 230 | __ATTR(in_write_index, S_IRUGO, vmbus_show_device_attr, NULL), |
| 231 | __ATTR(in_read_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 232 | __ATTR(in_write_bytes_avail, S_IRUGO, vmbus_show_device_attr, NULL), |
| 233 | __ATTR_NULL |
| 234 | }; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 235 | |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 236 | |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 237 | /* |
| 238 | * vmbus_uevent - add uevent for our device |
| 239 | * |
| 240 | * This routine is invoked when a device is added or removed on the vmbus to |
| 241 | * generate a uevent to udev in the userspace. The udev will then look at its |
| 242 | * rule and the uevent generated here to load the appropriate driver |
K. Y. Srinivasan | 0ddda66 | 2011-08-25 09:48:38 -0700 | [diff] [blame] | 243 | * |
| 244 | * The alias string will be of the form vmbus:guid where guid is the string |
| 245 | * representation of the device guid (each byte of the guid will be |
| 246 | * represented with two hex characters. |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 247 | */ |
| 248 | static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) |
| 249 | { |
| 250 | struct hv_device *dev = device_to_hv_device(device); |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 251 | int ret; |
| 252 | char alias_name[VMBUS_ALIAS_LEN + 1]; |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 253 | |
Olaf Hering | fd776ba | 2011-09-02 18:25:56 +0200 | [diff] [blame] | 254 | print_alias_name(dev, alias_name); |
K. Y. Srinivasan | 0ddda66 | 2011-08-25 09:48:38 -0700 | [diff] [blame] | 255 | ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name); |
| 256 | return ret; |
K. Y. Srinivasan | adde248 | 2011-03-15 15:03:37 -0700 | [diff] [blame] | 257 | } |
| 258 | |
K. Y. Srinivasan | 5841a82 | 2011-08-25 09:48:39 -0700 | [diff] [blame] | 259 | static uuid_le null_guid; |
| 260 | |
| 261 | static inline bool is_null_guid(const __u8 *guid) |
| 262 | { |
| 263 | if (memcmp(guid, &null_guid, sizeof(uuid_le))) |
| 264 | return false; |
| 265 | return true; |
| 266 | } |
| 267 | |
K. Y. Srinivasan | 3037a7b | 2011-09-13 10:59:37 -0700 | [diff] [blame] | 268 | /* |
| 269 | * Return a matching hv_vmbus_device_id pointer. |
| 270 | * If there is no match, return NULL. |
| 271 | */ |
| 272 | static const struct hv_vmbus_device_id *hv_vmbus_get_id( |
| 273 | const struct hv_vmbus_device_id *id, |
| 274 | __u8 *guid) |
| 275 | { |
| 276 | for (; !is_null_guid(id->guid); id++) |
| 277 | if (!memcmp(&id->guid, guid, sizeof(uuid_le))) |
| 278 | return id; |
| 279 | |
| 280 | return NULL; |
| 281 | } |
| 282 | |
| 283 | |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 284 | |
| 285 | /* |
| 286 | * vmbus_match - Attempt to match the specified device to the specified driver |
| 287 | */ |
| 288 | static int vmbus_match(struct device *device, struct device_driver *driver) |
| 289 | { |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 290 | struct hv_driver *drv = drv_to_hv_drv(driver); |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 291 | struct hv_device *hv_dev = device_to_hv_device(device); |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 292 | |
K. Y. Srinivasan | 3037a7b | 2011-09-13 10:59:37 -0700 | [diff] [blame] | 293 | if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b)) |
| 294 | return 1; |
K. Y. Srinivasan | de632a2 | 2011-04-26 09:20:24 -0700 | [diff] [blame] | 295 | |
K. Y. Srinivasan | 5841a82 | 2011-08-25 09:48:39 -0700 | [diff] [blame] | 296 | return 0; |
K. Y. Srinivasan | b7fc147 | 2011-03-15 15:03:38 -0700 | [diff] [blame] | 297 | } |
| 298 | |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 299 | /* |
| 300 | * vmbus_probe - Add the new vmbus's child device |
| 301 | */ |
| 302 | static int vmbus_probe(struct device *child_device) |
| 303 | { |
| 304 | int ret = 0; |
| 305 | struct hv_driver *drv = |
| 306 | drv_to_hv_drv(child_device->driver); |
K. Y. Srinivasan | 9efd21e | 2011-04-29 13:45:10 -0700 | [diff] [blame] | 307 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 308 | const struct hv_vmbus_device_id *dev_id; |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 309 | |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 310 | 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] | 311 | if (drv->probe) { |
K. Y. Srinivasan | 8494689 | 2011-09-13 10:59:38 -0700 | [diff] [blame] | 312 | ret = drv->probe(dev, dev_id); |
K. Y. Srinivasan | b14a7b3 | 2011-04-29 13:45:03 -0700 | [diff] [blame] | 313 | if (ret != 0) |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 314 | pr_err("probe failed for device %s (%d)\n", |
| 315 | dev_name(child_device), ret); |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 316 | |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 317 | } else { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 318 | pr_err("probe not set for driver %s\n", |
| 319 | dev_name(child_device)); |
K. Y. Srinivasan | 6de925b | 2011-06-06 15:50:07 -0700 | [diff] [blame] | 320 | ret = -ENODEV; |
K. Y. Srinivasan | f1f0d67 | 2011-03-15 15:03:39 -0700 | [diff] [blame] | 321 | } |
| 322 | return ret; |
| 323 | } |
| 324 | |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 325 | /* |
| 326 | * vmbus_remove - Remove a vmbus device |
| 327 | */ |
| 328 | static int vmbus_remove(struct device *child_device) |
| 329 | { |
K. Y. Srinivasan | d437217 | 2011-09-13 10:59:44 -0700 | [diff] [blame] | 330 | struct hv_driver *drv = drv_to_hv_drv(child_device->driver); |
K. Y. Srinivasan | 415b023 | 2011-04-29 13:45:12 -0700 | [diff] [blame] | 331 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 332 | |
K. Y. Srinivasan | d437217 | 2011-09-13 10:59:44 -0700 | [diff] [blame] | 333 | if (drv->remove) |
| 334 | drv->remove(dev); |
| 335 | else |
| 336 | pr_err("remove not set for driver %s\n", |
| 337 | dev_name(child_device)); |
K. Y. Srinivasan | c5dce3d | 2011-03-15 15:03:40 -0700 | [diff] [blame] | 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 342 | |
| 343 | /* |
| 344 | * vmbus_shutdown - Shutdown a vmbus device |
| 345 | */ |
| 346 | static void vmbus_shutdown(struct device *child_device) |
| 347 | { |
| 348 | struct hv_driver *drv; |
K. Y. Srinivasan | ca6887f | 2011-04-29 13:45:14 -0700 | [diff] [blame] | 349 | struct hv_device *dev = device_to_hv_device(child_device); |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 350 | |
| 351 | |
| 352 | /* The device may not be attached yet */ |
| 353 | if (!child_device->driver) |
| 354 | return; |
| 355 | |
| 356 | drv = drv_to_hv_drv(child_device->driver); |
| 357 | |
K. Y. Srinivasan | ca6887f | 2011-04-29 13:45:14 -0700 | [diff] [blame] | 358 | if (drv->shutdown) |
| 359 | drv->shutdown(dev); |
K. Y. Srinivasan | eb1bb25 | 2011-03-15 15:03:41 -0700 | [diff] [blame] | 360 | |
| 361 | return; |
| 362 | } |
| 363 | |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 364 | |
| 365 | /* |
| 366 | * vmbus_device_release - Final callback release of the vmbus child device |
| 367 | */ |
| 368 | static void vmbus_device_release(struct device *device) |
| 369 | { |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 370 | struct hv_device *hv_dev = device_to_hv_device(device); |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 371 | |
K. Y. Srinivasan | e8e2704 | 2011-06-06 15:50:04 -0700 | [diff] [blame] | 372 | kfree(hv_dev); |
K. Y. Srinivasan | 086e7a5 | 2011-03-15 15:03:42 -0700 | [diff] [blame] | 373 | |
| 374 | } |
| 375 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 376 | /* The one and only one */ |
K. Y. Srinivasan | 9adcac5 | 2011-04-29 13:45:08 -0700 | [diff] [blame] | 377 | static struct bus_type hv_bus = { |
| 378 | .name = "vmbus", |
| 379 | .match = vmbus_match, |
| 380 | .shutdown = vmbus_shutdown, |
| 381 | .remove = vmbus_remove, |
| 382 | .probe = vmbus_probe, |
| 383 | .uevent = vmbus_uevent, |
| 384 | .dev_attrs = vmbus_device_attrs, |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 385 | }; |
| 386 | |
Haiyang Zhang | adf874c | 2011-01-26 12:12:09 -0800 | [diff] [blame] | 387 | static const char *driver_name = "hyperv"; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 388 | |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 389 | |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 390 | struct onmessage_work_context { |
| 391 | struct work_struct work; |
| 392 | struct hv_message msg; |
| 393 | }; |
| 394 | |
| 395 | static void vmbus_onmessage_work(struct work_struct *work) |
| 396 | { |
| 397 | struct onmessage_work_context *ctx; |
| 398 | |
| 399 | ctx = container_of(work, struct onmessage_work_context, |
| 400 | work); |
| 401 | vmbus_onmessage(&ctx->msg); |
| 402 | kfree(ctx); |
| 403 | } |
| 404 | |
K. Y. Srinivasan | 62c1059 | 2011-03-10 14:04:53 -0800 | [diff] [blame] | 405 | static void vmbus_on_msg_dpc(unsigned long data) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 406 | { |
| 407 | int cpu = smp_processor_id(); |
| 408 | void *page_addr = hv_context.synic_message_page[cpu]; |
| 409 | struct hv_message *msg = (struct hv_message *)page_addr + |
| 410 | VMBUS_MESSAGE_SINT; |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 411 | struct onmessage_work_context *ctx; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 412 | |
| 413 | while (1) { |
| 414 | if (msg->header.message_type == HVMSG_NONE) { |
| 415 | /* no msg */ |
| 416 | break; |
| 417 | } else { |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 418 | ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC); |
| 419 | if (ctx == NULL) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 420 | continue; |
Timo Teräs | bf6506f | 2010-12-15 20:48:08 +0200 | [diff] [blame] | 421 | INIT_WORK(&ctx->work, vmbus_onmessage_work); |
| 422 | memcpy(&ctx->msg, msg, sizeof(*msg)); |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 423 | queue_work(vmbus_connection.work_queue, &ctx->work); |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | msg->header.message_type = HVMSG_NONE; |
| 427 | |
| 428 | /* |
| 429 | * Make sure the write to MessageType (ie set to |
| 430 | * HVMSG_NONE) happens before we read the |
| 431 | * MessagePending and EOMing. Otherwise, the EOMing |
| 432 | * will not deliver any more messages since there is |
| 433 | * no empty slot |
| 434 | */ |
K. Y. Srinivasan | e826f1d | 2011-06-06 15:50:03 -0700 | [diff] [blame] | 435 | smp_mb(); |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 436 | |
| 437 | if (msg->header.message_flags.msg_pending) { |
| 438 | /* |
| 439 | * This will cause message queue rescan to |
| 440 | * possibly deliver another msg from the |
| 441 | * hypervisor |
| 442 | */ |
| 443 | wrmsrl(HV_X64_MSR_EOM, 0); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 448 | static irqreturn_t vmbus_isr(int irq, void *dev_id) |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 449 | { |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 450 | int cpu = smp_processor_id(); |
| 451 | void *page_addr; |
| 452 | struct hv_message *msg; |
| 453 | union hv_synic_event_flags *event; |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 454 | bool handled = false; |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 455 | |
K. Y. Srinivasan | 7341d90 | 2011-08-31 14:35:56 -0700 | [diff] [blame] | 456 | /* |
| 457 | * Check for events before checking for messages. This is the order |
| 458 | * in which events and messages are checked in Windows guests on |
| 459 | * Hyper-V, and the Windows team suggested we do the same. |
| 460 | */ |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 461 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 462 | if ((vmbus_proto_version == VERSION_WS2008) || |
| 463 | (vmbus_proto_version == VERSION_WIN7)) { |
Greg Kroah-Hartman | 36199a9 | 2010-12-02 11:59:22 -0800 | [diff] [blame] | 464 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 465 | page_addr = hv_context.synic_event_page[cpu]; |
| 466 | event = (union hv_synic_event_flags *)page_addr + |
| 467 | VMBUS_MESSAGE_SINT; |
| 468 | |
| 469 | /* Since we are a child, we only need to check bit 0 */ |
| 470 | if (sync_test_and_clear_bit(0, |
| 471 | (unsigned long *) &event->flags32[0])) { |
| 472 | handled = true; |
| 473 | } |
| 474 | } else { |
| 475 | /* |
| 476 | * Our host is win8 or above. The signaling mechanism |
| 477 | * has changed and we can directly look at the event page. |
| 478 | * If bit n is set then we have an interrup on the channel |
| 479 | * whose id is n. |
| 480 | */ |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 481 | handled = true; |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 482 | } |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 483 | |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 484 | if (handled) |
K. Y. Srinivasan | db11f12 | 2012-12-01 06:46:53 -0800 | [diff] [blame^] | 485 | tasklet_schedule(hv_context.event_dpc[cpu]); |
K. Y. Srinivasan | 6552ecd | 2012-12-01 06:46:49 -0800 | [diff] [blame] | 486 | |
| 487 | |
K. Y. Srinivasan | 7341d90 | 2011-08-31 14:35:56 -0700 | [diff] [blame] | 488 | page_addr = hv_context.synic_message_page[cpu]; |
| 489 | msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT; |
| 490 | |
| 491 | /* Check if there are actual msgs to be processed */ |
| 492 | if (msg->header.message_type != HVMSG_NONE) { |
| 493 | handled = true; |
| 494 | tasklet_schedule(&msg_dpc); |
| 495 | } |
| 496 | |
K. Y. Srinivasan | ae4636e | 2011-08-27 11:31:35 -0700 | [diff] [blame] | 497 | if (handled) |
| 498 | return IRQ_HANDLED; |
| 499 | else |
| 500 | return IRQ_NONE; |
K. Y. Srinivasan | 793be9c | 2011-03-15 15:03:43 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 503 | /* |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 504 | * vmbus_bus_init -Main vmbus driver initialization routine. |
| 505 | * |
| 506 | * Here, we |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 507 | * - initialize the vmbus driver context |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 508 | * - invoke the vmbus hv main init routine |
| 509 | * - get the irq resource |
Lars Lindley | 0686e4f | 2010-03-11 23:51:23 +0100 | [diff] [blame] | 510 | * - retrieve the channel offers |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 511 | */ |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 512 | static int vmbus_bus_init(int irq) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 513 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 514 | int ret; |
| 515 | unsigned int vector; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 516 | |
Greg Kroah-Hartman | 6d26e38fa2 | 2010-12-02 12:08:08 -0800 | [diff] [blame] | 517 | /* Hypervisor initialization...setup hypercall page..etc */ |
| 518 | ret = hv_init(); |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 519 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 520 | pr_err("Unable to initialize the hypervisor - 0x%x\n", ret); |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 521 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 522 | } |
| 523 | |
K. Y. Srinivasan | 59c0e4f | 2011-04-29 13:45:06 -0700 | [diff] [blame] | 524 | tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 525 | |
K. Y. Srinivasan | 9adcac5 | 2011-04-29 13:45:08 -0700 | [diff] [blame] | 526 | ret = bus_register(&hv_bus); |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 527 | if (ret) |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 528 | goto err_cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 529 | |
Theodore Ts'o | 20ed3ef | 2012-07-17 13:50:30 -0400 | [diff] [blame] | 530 | ret = request_irq(irq, vmbus_isr, 0, driver_name, hv_acpi_dev); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 531 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 532 | if (ret != 0) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 533 | pr_err("Unable to request IRQ %d\n", |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 534 | irq); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 535 | goto err_unregister; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 536 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 537 | |
K. Y. Srinivasan | 9aaa995 | 2011-06-06 15:49:37 -0700 | [diff] [blame] | 538 | vector = IRQ0_VECTOR + irq; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 539 | |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 540 | /* |
| 541 | * Notify the hypervisor of our irq and |
| 542 | * connect to the host. |
| 543 | */ |
| 544 | on_each_cpu(hv_synic_init, (void *)&vector, 1); |
| 545 | ret = vmbus_connect(); |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 546 | if (ret) |
| 547 | goto err_irq; |
K. Y. Srinivasan | 800b690 | 2011-03-15 15:03:33 -0700 | [diff] [blame] | 548 | |
Greg Kroah-Hartman | 2d6e882 | 2010-12-02 08:50:58 -0800 | [diff] [blame] | 549 | vmbus_request_offers(); |
Haiyang Zhang | 8b5d6d3 | 2010-05-28 23:22:44 +0000 | [diff] [blame] | 550 | |
K. Y. Srinivasan | d6c1c5d | 2011-06-06 15:50:08 -0700 | [diff] [blame] | 551 | return 0; |
K. Y. Srinivasan | 8b9987e | 2011-08-31 14:35:55 -0700 | [diff] [blame] | 552 | |
| 553 | err_irq: |
| 554 | free_irq(irq, hv_acpi_dev); |
| 555 | |
| 556 | err_unregister: |
| 557 | bus_unregister(&hv_bus); |
| 558 | |
| 559 | err_cleanup: |
| 560 | hv_cleanup(); |
| 561 | |
| 562 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 563 | } |
| 564 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 565 | /** |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 566 | * __vmbus_child_driver_register - Register a vmbus's driver |
| 567 | * @drv: Pointer to driver structure you want to register |
| 568 | * @owner: owner module of the drv |
| 569 | * @mod_name: module name string |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 570 | * |
| 571 | * Registers the given driver with Linux through the 'driver_register()' call |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 572 | * and sets up the hyper-v vmbus handling for this driver. |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 573 | * It will return the state of the 'driver_register()' call. |
| 574 | * |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 575 | */ |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 576 | 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] | 577 | { |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 578 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 579 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 580 | pr_info("registering driver %s\n", hv_driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 581 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 582 | ret = vmbus_exists(); |
| 583 | if (ret < 0) |
| 584 | return ret; |
| 585 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 586 | hv_driver->driver.name = hv_driver->name; |
| 587 | hv_driver->driver.owner = owner; |
| 588 | hv_driver->driver.mod_name = mod_name; |
| 589 | hv_driver->driver.bus = &hv_bus; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 590 | |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 591 | ret = driver_register(&hv_driver->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 592 | |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 593 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 594 | } |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 595 | EXPORT_SYMBOL_GPL(__vmbus_driver_register); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 596 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 597 | /** |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 598 | * vmbus_driver_unregister() - Unregister a vmbus's driver |
| 599 | * @drv: Pointer to driver structure you want to un-register |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 600 | * |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 601 | * Un-register the given driver that was previous registered with a call to |
| 602 | * vmbus_driver_register() |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 603 | */ |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 604 | void vmbus_driver_unregister(struct hv_driver *hv_driver) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 605 | { |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 606 | pr_info("unregistering driver %s\n", hv_driver->name); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 607 | |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 608 | if (!vmbus_exists()) |
K. Y. Srinivasan | 8f257a1 | 2011-12-27 13:49:37 -0800 | [diff] [blame] | 609 | driver_unregister(&hv_driver->driver); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 610 | } |
Greg Kroah-Hartman | 768fa21 | 2011-08-25 15:07:32 -0700 | [diff] [blame] | 611 | EXPORT_SYMBOL_GPL(vmbus_driver_unregister); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 612 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 613 | /* |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 614 | * vmbus_device_create - Creates and registers a new child device |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 615 | * on the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 616 | */ |
K. Y. Srinivasan | f2c7301 | 2011-09-08 07:24:12 -0700 | [diff] [blame] | 617 | struct hv_device *vmbus_device_create(uuid_le *type, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 618 | uuid_le *instance, |
Greg Kroah-Hartman | 89733aa | 2010-12-02 08:22:41 -0800 | [diff] [blame] | 619 | struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 620 | { |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 621 | struct hv_device *child_device_obj; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 622 | |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 623 | child_device_obj = kzalloc(sizeof(struct hv_device), GFP_KERNEL); |
| 624 | if (!child_device_obj) { |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 625 | pr_err("Unable to allocate device object for child device\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 626 | return NULL; |
| 627 | } |
| 628 | |
Greg Kroah-Hartman | cae5b84 | 2010-10-21 09:05:27 -0700 | [diff] [blame] | 629 | child_device_obj->channel = channel; |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 630 | memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le)); |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 631 | memcpy(&child_device_obj->dev_instance, instance, |
K. Y. Srinivasan | 358d2ee | 2011-08-25 09:48:28 -0700 | [diff] [blame] | 632 | sizeof(uuid_le)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 633 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 634 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 635 | return child_device_obj; |
| 636 | } |
| 637 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 638 | /* |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 639 | * vmbus_device_register - Register the child device |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 640 | */ |
K. Y. Srinivasan | 22794281 | 2011-09-08 07:24:13 -0700 | [diff] [blame] | 641 | int vmbus_device_register(struct hv_device *child_device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 642 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 643 | int ret = 0; |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 644 | |
Bill Pemberton | f488841 | 2009-07-29 17:00:12 -0400 | [diff] [blame] | 645 | static atomic_t device_num = ATOMIC_INIT(0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 646 | |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 647 | dev_set_name(&child_device_obj->device, "vmbus_0_%d", |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 648 | atomic_inc_return(&device_num)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 649 | |
K. Y. Srinivasan | 0bce28b | 2011-08-27 11:31:39 -0700 | [diff] [blame] | 650 | child_device_obj->device.bus = &hv_bus; |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 651 | child_device_obj->device.parent = &hv_acpi_dev->dev; |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 652 | child_device_obj->device.release = vmbus_device_release; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 653 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 654 | /* |
| 655 | * Register with the LDM. This will kick off the driver/device |
| 656 | * binding...which will eventually call vmbus_match() and vmbus_probe() |
| 657 | */ |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 658 | ret = device_register(&child_device_obj->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 659 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 660 | if (ret) |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 661 | pr_err("Unable to register child device\n"); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 662 | else |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 663 | pr_info("child device %s registered\n", |
| 664 | dev_name(&child_device_obj->device)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 665 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 666 | return ret; |
| 667 | } |
| 668 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 669 | /* |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 670 | * vmbus_device_unregister - Remove the specified child device |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 671 | * from the vmbus. |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 672 | */ |
K. Y. Srinivasan | 696453b | 2011-09-08 07:24:14 -0700 | [diff] [blame] | 673 | void vmbus_device_unregister(struct hv_device *device_obj) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 674 | { |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 675 | /* |
| 676 | * Kick off the process of unregistering the device. |
| 677 | * This will call vmbus_remove() and eventually vmbus_device_release() |
| 678 | */ |
K. Y. Srinivasan | 6bad88da | 2011-03-07 13:35:48 -0800 | [diff] [blame] | 679 | device_unregister(&device_obj->device); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 680 | |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 681 | pr_info("child device %s unregistered\n", |
| 682 | dev_name(&device_obj->device)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 683 | } |
| 684 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 685 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 686 | /* |
| 687 | * VMBUS is an acpi enumerated device. Get the the IRQ information |
| 688 | * from DSDT. |
| 689 | */ |
| 690 | |
| 691 | static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) |
| 692 | { |
| 693 | |
| 694 | if (res->type == ACPI_RESOURCE_TYPE_IRQ) { |
| 695 | struct acpi_resource_irq *irqp; |
| 696 | irqp = &res->data.irq; |
| 697 | |
| 698 | *((unsigned int *)irq) = irqp->interrupts[0]; |
| 699 | } |
| 700 | |
| 701 | return AE_OK; |
| 702 | } |
| 703 | |
| 704 | static int vmbus_acpi_add(struct acpi_device *device) |
| 705 | { |
| 706 | acpi_status result; |
| 707 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 708 | hv_acpi_dev = device; |
| 709 | |
K. Y. Srinivasan | 0a4425b | 2011-08-27 11:31:38 -0700 | [diff] [blame] | 710 | result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, |
| 711 | vmbus_walk_resources, &irq); |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 712 | |
| 713 | if (ACPI_FAILURE(result)) { |
| 714 | complete(&probe_event); |
| 715 | return -ENODEV; |
| 716 | } |
| 717 | complete(&probe_event); |
| 718 | return 0; |
| 719 | } |
| 720 | |
| 721 | static const struct acpi_device_id vmbus_acpi_device_ids[] = { |
| 722 | {"VMBUS", 0}, |
K. Y. Srinivasan | 9d7b18d | 2011-06-06 15:49:42 -0700 | [diff] [blame] | 723 | {"VMBus", 0}, |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 724 | {"", 0}, |
| 725 | }; |
| 726 | MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); |
| 727 | |
| 728 | static struct acpi_driver vmbus_acpi_driver = { |
| 729 | .name = "vmbus", |
| 730 | .ids = vmbus_acpi_device_ids, |
| 731 | .ops = { |
| 732 | .add = vmbus_acpi_add, |
| 733 | }, |
| 734 | }; |
| 735 | |
K. Y. Srinivasan | 607c1a1 | 2011-06-06 15:49:39 -0700 | [diff] [blame] | 736 | static int __init hv_acpi_init(void) |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 737 | { |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 738 | int ret, t; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 739 | |
Jason Wang | 1f94ea8 | 2012-08-31 13:32:44 +0800 | [diff] [blame] | 740 | if (x86_hyper != &x86_hyper_ms_hyperv) |
Jason Wang | 0592969 | 2012-08-17 18:52:43 +0800 | [diff] [blame] | 741 | return -ENODEV; |
| 742 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 743 | init_completion(&probe_event); |
| 744 | |
| 745 | /* |
| 746 | * Get irq resources first. |
| 747 | */ |
| 748 | |
K. Y. Srinivasan | 0246604 | 2011-06-06 15:49:40 -0700 | [diff] [blame] | 749 | ret = acpi_bus_register_driver(&vmbus_acpi_driver); |
| 750 | |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 751 | if (ret) |
| 752 | return ret; |
| 753 | |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 754 | t = wait_for_completion_timeout(&probe_event, 5*HZ); |
| 755 | if (t == 0) { |
| 756 | ret = -ETIMEDOUT; |
| 757 | goto cleanup; |
| 758 | } |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 759 | |
| 760 | if (irq <= 0) { |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 761 | ret = -ENODEV; |
| 762 | goto cleanup; |
K. Y. Srinivasan | b0069f4 | 2011-04-29 13:45:15 -0700 | [diff] [blame] | 763 | } |
| 764 | |
K. Y. Srinivasan | 91fd799 | 2011-06-16 13:16:38 -0700 | [diff] [blame] | 765 | ret = vmbus_bus_init(irq); |
| 766 | if (ret) |
K. Y. Srinivasan | 2dda95f | 2011-07-15 13:38:56 -0700 | [diff] [blame] | 767 | goto cleanup; |
| 768 | |
| 769 | return 0; |
| 770 | |
| 771 | cleanup: |
| 772 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
K. Y. Srinivasan | cf6a2ea | 2011-12-01 09:59:34 -0800 | [diff] [blame] | 773 | hv_acpi_dev = NULL; |
K. Y. Srinivasan | 91fd799 | 2011-06-16 13:16:38 -0700 | [diff] [blame] | 774 | return ret; |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 775 | } |
| 776 | |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 777 | static void __exit vmbus_exit(void) |
| 778 | { |
| 779 | |
| 780 | free_irq(irq, hv_acpi_dev); |
| 781 | vmbus_free_channels(); |
| 782 | bus_unregister(&hv_bus); |
| 783 | hv_cleanup(); |
| 784 | acpi_bus_unregister_driver(&vmbus_acpi_driver); |
| 785 | } |
| 786 | |
K. Y. Srinivasan | 1168ac2 | 2011-03-15 15:03:32 -0700 | [diff] [blame] | 787 | |
Greg Kroah-Hartman | 90c9960 | 2009-09-02 07:11:14 -0700 | [diff] [blame] | 788 | MODULE_LICENSE("GPL"); |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 789 | MODULE_VERSION(HV_DRV_VERSION); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 790 | |
K. Y. Srinivasan | 43d4e11 | 2011-10-24 11:28:12 -0700 | [diff] [blame] | 791 | subsys_initcall(hv_acpi_init); |
K. Y. Srinivasan | 93e5bd0 | 2011-12-12 09:29:17 -0800 | [diff] [blame] | 792 | module_exit(vmbus_exit); |