Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 2 | * Copyright (c) 2009, Microsoft Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 15 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
| 17 | * Authors: |
| 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
| 19 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 20 | */ |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 22 | |
Greg Kroah-Hartman | 5654e93 | 2009-07-14 15:08:20 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 24 | #include <linux/sched.h> |
| 25 | #include <linux/wait.h> |
Greg Kroah-Hartman | a0086dc | 2009-08-17 17:22:08 -0700 | [diff] [blame] | 26 | #include <linux/mm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
K. Y. Srinivasan | e3fe0bb | 2011-02-11 10:00:12 -0800 | [diff] [blame] | 29 | #include "hv_api.h" |
Greg Kroah-Hartman | 645954c | 2009-08-28 16:22:59 -0700 | [diff] [blame] | 30 | #include "logging.h" |
Greg Kroah-Hartman | 72daf32 | 2010-05-05 22:45:25 -0700 | [diff] [blame] | 31 | #include "vmbus_private.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 32 | |
K. Y. Srinivasan | e3fe0bb | 2011-02-11 10:00:12 -0800 | [diff] [blame] | 33 | #define NUM_PAGES_SPANNED(addr, len) \ |
| 34 | ((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT)) |
| 35 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 36 | /* Internal routines */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 37 | static int create_gpadl_header( |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 38 | void *kbuffer, /* must be phys and virt contiguous */ |
| 39 | u32 size, /* page-size multiple */ |
| 40 | struct vmbus_channel_msginfo **msginfo, |
| 41 | u32 *messagecount); |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 42 | static void dump_vmbus_channel(struct vmbus_channel *channel); |
| 43 | static void vmbus_setevent(struct vmbus_channel *channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 44 | |
| 45 | |
| 46 | #if 0 |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 47 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 48 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 49 | int i = 0; |
| 50 | int j = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 51 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 52 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 53 | MonitorPage, MonitorPage->trigger_state); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 54 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 55 | for (i = 0; i < 4; i++) |
| 56 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 57 | MonitorPage->trigger_group[i].as_uint64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 58 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 59 | for (i = 0; i < 4; i++) { |
| 60 | for (j = 0; j < 32; j++) { |
| 61 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 62 | MonitorPage->latency[i][j]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 63 | } |
| 64 | } |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 65 | for (i = 0; i < 4; i++) { |
| 66 | for (j = 0; j < 32; j++) { |
| 67 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 68 | MonitorPage->parameter[i][j].connectionid.asu32); |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 69 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 70 | MonitorPage->parameter[i][j].flag_number); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 71 | } |
| 72 | } |
| 73 | } |
| 74 | #endif |
| 75 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 76 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 77 | * vmbus_setevent- Trigger an event notification on the specified |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 78 | * channel. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 79 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 80 | static void vmbus_setevent(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 81 | { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 82 | struct hv_monitor_page *monitorpage; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 83 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 84 | if (channel->offermsg.monitor_allocated) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 85 | /* Each u32 represents 32 channels */ |
Olaf Hering | 2235658 | 2011-03-21 14:41:37 +0100 | [diff] [blame] | 86 | sync_set_bit(channel->offermsg.child_relid & 31, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 87 | (unsigned long *) vmbus_connection.send_int_page + |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 88 | (channel->offermsg.child_relid >> 5)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 89 | |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 90 | monitorpage = vmbus_connection.monitor_pages; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 91 | monitorpage++; /* Get the child to parent monitor page */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 92 | |
Olaf Hering | 2235658 | 2011-03-21 14:41:37 +0100 | [diff] [blame] | 93 | sync_set_bit(channel->monitor_bit, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 94 | (unsigned long *)&monitorpage->trigger_group |
| 95 | [channel->monitor_grp].pending); |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 96 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 97 | } else { |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 98 | vmbus_set_event(channel->offermsg.child_relid); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 99 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | #if 0 |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 103 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 104 | { |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 105 | struct hv_monitor_page *monitorPage; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 106 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 107 | if (Channel->offermsg.monitor_allocated) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 108 | /* Each u32 represents 32 channels */ |
Olaf Hering | 2235658 | 2011-03-21 14:41:37 +0100 | [diff] [blame] | 109 | sync_clear_bit(Channel->offermsg.child_relid & 31, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 110 | (unsigned long *)vmbus_connection.send_int_page + |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 111 | (Channel->offermsg.child_relid >> 5)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 112 | |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 113 | monitorPage = (struct hv_monitor_page *) |
| 114 | vmbus_connection.monitor_pages; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 115 | monitorPage++; /* Get the child to parent monitor page */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 116 | |
Olaf Hering | 2235658 | 2011-03-21 14:41:37 +0100 | [diff] [blame] | 117 | sync_clear_bit(Channel->monitor_bit, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 118 | (unsigned long *)&monitorPage->trigger_group |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 119 | [Channel->monitor_grp].Pending); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 120 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | #endif |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 124 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 125 | * vmbus_get_debug_info -Retrieve various channel debug info |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 126 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 127 | void vmbus_get_debug_info(struct vmbus_channel *channel, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 128 | struct vmbus_channel_debug_info *debuginfo) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 129 | { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 130 | struct hv_monitor_page *monitorpage; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 131 | u8 monitor_group = (u8)channel->offermsg.monitorid / 32; |
| 132 | u8 monitor_offset = (u8)channel->offermsg.monitorid % 32; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 133 | /* u32 monitorBit = 1 << monitorOffset; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 134 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 135 | debuginfo->relid = channel->offermsg.child_relid; |
| 136 | debuginfo->state = channel->state; |
| 137 | memcpy(&debuginfo->interfacetype, |
Haiyang Zhang | 767dff6 | 2011-01-26 12:12:12 -0800 | [diff] [blame] | 138 | &channel->offermsg.offer.if_type, sizeof(struct hv_guid)); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 139 | memcpy(&debuginfo->interface_instance, |
Haiyang Zhang | 767dff6 | 2011-01-26 12:12:12 -0800 | [diff] [blame] | 140 | &channel->offermsg.offer.if_instance, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 141 | sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 142 | |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 143 | monitorpage = (struct hv_monitor_page *)vmbus_connection.monitor_pages; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 144 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 145 | debuginfo->monitorid = channel->offermsg.monitorid; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 146 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 147 | debuginfo->servermonitor_pending = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 148 | monitorpage->trigger_group[monitor_group].pending; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 149 | debuginfo->servermonitor_latency = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 150 | monitorpage->latency[monitor_group][monitor_offset]; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 151 | debuginfo->servermonitor_connectionid = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 152 | monitorpage->parameter[monitor_group] |
| 153 | [monitor_offset].connectionid.u.id; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 154 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 155 | monitorpage++; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 156 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 157 | debuginfo->clientmonitor_pending = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 158 | monitorpage->trigger_group[monitor_group].pending; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 159 | debuginfo->clientmonitor_latency = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 160 | monitorpage->latency[monitor_group][monitor_offset]; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 161 | debuginfo->clientmonitor_connectionid = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame] | 162 | monitorpage->parameter[monitor_group] |
| 163 | [monitor_offset].connectionid.u.id; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 164 | |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 165 | ringbuffer_get_debuginfo(&channel->inbound, &debuginfo->inbound); |
| 166 | ringbuffer_get_debuginfo(&channel->outbound, &debuginfo->outbound); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 169 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 170 | * vmbus_open - Open the specified channel. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 171 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 172 | int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 173 | u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, |
| 174 | void (*onchannelcallback)(void *context), void *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 175 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 176 | struct vmbus_channel_open_channel *openMsg; |
Bill Pemberton | b94ef34 | 2010-05-05 15:27:37 -0400 | [diff] [blame] | 177 | struct vmbus_channel_msginfo *openInfo = NULL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 178 | void *in, *out; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 179 | unsigned long flags; |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 180 | int ret, err = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 181 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 182 | /* Aligned to page size */ |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 183 | /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */ |
| 184 | /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 185 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 186 | newchannel->onchannel_callback = onchannelcallback; |
| 187 | newchannel->channel_callback_context = context; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 188 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 189 | /* Allocate the ring buffer */ |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 190 | out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, |
| 191 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); |
| 192 | |
Bill Pemberton | 7e052d9 | 2010-05-05 15:27:30 -0400 | [diff] [blame] | 193 | if (!out) |
| 194 | return -ENOMEM; |
| 195 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 196 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 197 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 198 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 199 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 200 | newchannel->ringbuffer_pages = out; |
| 201 | newchannel->ringbuffer_pagecount = (send_ringbuffer_size + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 202 | recv_ringbuffer_size) >> PAGE_SHIFT; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 203 | |
K. Y. Srinivasan | 72a95cb | 2011-05-10 07:55:21 -0700 | [diff] [blame] | 204 | ret = hv_ringbuffer_init( |
| 205 | &newchannel->outbound, out, send_ringbuffer_size); |
| 206 | |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 207 | if (ret != 0) { |
Bill Pemberton | 3324fb4 | 2010-05-05 15:27:49 -0400 | [diff] [blame] | 208 | err = ret; |
| 209 | goto errorout; |
| 210 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 211 | |
K. Y. Srinivasan | 72a95cb | 2011-05-10 07:55:21 -0700 | [diff] [blame] | 212 | ret = hv_ringbuffer_init( |
| 213 | &newchannel->inbound, in, recv_ringbuffer_size); |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 214 | if (ret != 0) { |
Bill Pemberton | 3324fb4 | 2010-05-05 15:27:49 -0400 | [diff] [blame] | 215 | err = ret; |
| 216 | goto errorout; |
| 217 | } |
| 218 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 219 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 220 | /* Establish the gpadl for the ring buffer */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 221 | newchannel->ringbuffer_gpadlhandle = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 222 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 223 | ret = vmbus_establish_gpadl(newchannel, |
Haiyang Zhang | 82f8bd4 | 2010-11-08 14:04:45 -0800 | [diff] [blame] | 224 | newchannel->outbound.ring_buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 225 | send_ringbuffer_size + |
| 226 | recv_ringbuffer_size, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 227 | &newchannel->ringbuffer_gpadlhandle); |
Bill Pemberton | b94ef34 | 2010-05-05 15:27:37 -0400 | [diff] [blame] | 228 | |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 229 | if (ret != 0) { |
Bill Pemberton | b94ef34 | 2010-05-05 15:27:37 -0400 | [diff] [blame] | 230 | err = ret; |
| 231 | goto errorout; |
| 232 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 233 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 234 | /* Create and init the channel open message */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 235 | openInfo = kmalloc(sizeof(*openInfo) + |
| 236 | sizeof(struct vmbus_channel_open_channel), |
| 237 | GFP_KERNEL); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 238 | if (!openInfo) { |
| 239 | err = -ENOMEM; |
| 240 | goto errorout; |
| 241 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 242 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 243 | init_waitqueue_head(&openInfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 244 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 245 | openMsg = (struct vmbus_channel_open_channel *)openInfo->msg; |
| 246 | openMsg->header.msgtype = CHANNELMSG_OPENCHANNEL; |
| 247 | openMsg->openid = newchannel->offermsg.child_relid; /* FIXME */ |
| 248 | openMsg->child_relid = newchannel->offermsg.child_relid; |
| 249 | openMsg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; |
| 250 | openMsg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >> |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 251 | PAGE_SHIFT; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 252 | openMsg->server_contextarea_gpadlhandle = 0; /* TODO */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 253 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 254 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
Bill Pemberton | c827f94 | 2010-05-05 15:27:38 -0400 | [diff] [blame] | 255 | err = -EINVAL; |
| 256 | goto errorout; |
| 257 | } |
| 258 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 259 | if (userdatalen) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 260 | memcpy(openMsg->userdata, userdata, userdatalen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 261 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 262 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 263 | list_add_tail(&openInfo->msglistentry, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 264 | &vmbus_connection.chn_msg_list); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 265 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 266 | |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 267 | ret = vmbus_post_msg(openMsg, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 268 | sizeof(struct vmbus_channel_open_channel)); |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 269 | |
| 270 | if (ret != 0) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 271 | goto Cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 272 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 273 | openInfo->wait_condition = 0; |
| 274 | wait_event_timeout(openInfo->waitevent, |
| 275 | openInfo->wait_condition, |
| 276 | msecs_to_jiffies(1000)); |
| 277 | if (openInfo->wait_condition == 0) { |
| 278 | err = -ETIMEDOUT; |
| 279 | goto errorout; |
| 280 | } |
| 281 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 282 | |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 283 | if (openInfo->response.open_result.status) |
| 284 | err = openInfo->response.open_result.status; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 285 | |
| 286 | Cleanup: |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 287 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 288 | list_del(&openInfo->msglistentry); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 289 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 290 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 291 | kfree(openInfo); |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 292 | return err; |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 293 | |
| 294 | errorout: |
K. Y. Srinivasan | 2dba688 | 2011-05-10 07:55:22 -0700 | [diff] [blame] | 295 | hv_ringbuffer_cleanup(&newchannel->outbound); |
| 296 | hv_ringbuffer_cleanup(&newchannel->inbound); |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 297 | free_pages((unsigned long)out, |
| 298 | get_order(send_ringbuffer_size + recv_ringbuffer_size)); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 299 | kfree(openInfo); |
| 300 | return err; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 301 | } |
Greg Kroah-Hartman | 36ceadf | 2010-10-21 09:58:21 -0700 | [diff] [blame] | 302 | EXPORT_SYMBOL_GPL(vmbus_open); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 303 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 304 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 305 | * dump_gpadl_body - Dump the gpadl body message to the console for |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 306 | * debugging purposes. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 307 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 308 | static void dump_gpadl_body(struct vmbus_channel_gpadl_body *gpadl, u32 len) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 309 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 310 | int i; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 311 | int pfncount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 312 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 313 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 314 | sizeof(u64); |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 315 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 316 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 317 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 318 | for (i = 0; i < pfncount; i++) |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 319 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 320 | i, gpadl->pfn[i]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 323 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 324 | * dump_gpadl_header - Dump the gpadl header message to the console for |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 325 | * debugging purposes. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 326 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 327 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 328 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 329 | int i, j; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 330 | int pagecount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 331 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 332 | DPRINT_DBG(VMBUS, |
| 333 | "gpadl header - relid %d, range count %d, range buflen %d", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 334 | gpadl->child_relid, gpadl->rangecount, gpadl->range_buflen); |
| 335 | for (i = 0; i < gpadl->rangecount; i++) { |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 336 | pagecount = gpadl->range[i].byte_count >> PAGE_SHIFT; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 337 | pagecount = (pagecount > 26) ? 26 : pagecount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 338 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 339 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 340 | "page count %d", i, gpadl->range[i].byte_count, |
| 341 | gpadl->range[i].byte_offset, pagecount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 342 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 343 | for (j = 0; j < pagecount; j++) |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 344 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 345 | gpadl->range[i].pfn_array[j]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 346 | } |
| 347 | } |
| 348 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 349 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 350 | * create_gpadl_header - Creates a gpadl for the specified buffer |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 351 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 352 | static int create_gpadl_header(void *kbuffer, u32 size, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 353 | struct vmbus_channel_msginfo **msginfo, |
| 354 | u32 *messagecount) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 355 | { |
| 356 | int i; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 357 | int pagecount; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 358 | unsigned long long pfn; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 359 | struct vmbus_channel_gpadl_header *gpadl_header; |
| 360 | struct vmbus_channel_gpadl_body *gpadl_body; |
| 361 | struct vmbus_channel_msginfo *msgheader; |
| 362 | struct vmbus_channel_msginfo *msgbody = NULL; |
| 363 | u32 msgsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 364 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 365 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 366 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 367 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 368 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 369 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 370 | pagecount = size >> PAGE_SHIFT; |
| 371 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 372 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 373 | /* do we need a gpadl body msg */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 374 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 375 | sizeof(struct vmbus_channel_gpadl_header) - |
| 376 | sizeof(struct gpa_range); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 377 | pfncount = pfnsize / sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 378 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 379 | if (pagecount > pfncount) { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 380 | /* we need a gpadl body */ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 381 | /* fill in the header */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 382 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 383 | sizeof(struct vmbus_channel_gpadl_header) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 384 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
| 385 | msgheader = kzalloc(msgsize, GFP_KERNEL); |
| 386 | if (!msgheader) |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 387 | goto nomem; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 388 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 389 | INIT_LIST_HEAD(&msgheader->submsglist); |
| 390 | msgheader->msgsize = msgsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 391 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 392 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 393 | msgheader->msg; |
| 394 | gpadl_header->rangecount = 1; |
| 395 | gpadl_header->range_buflen = sizeof(struct gpa_range) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 396 | pagecount * sizeof(u64); |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 397 | gpadl_header->range[0].byte_offset = 0; |
| 398 | gpadl_header->range[0].byte_count = size; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 399 | for (i = 0; i < pfncount; i++) |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 400 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 401 | *msginfo = msgheader; |
| 402 | *messagecount = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 403 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 404 | pfnsum = pfncount; |
| 405 | pfnleft = pagecount - pfncount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 406 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 407 | /* how many pfns can we fit */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 408 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 409 | sizeof(struct vmbus_channel_gpadl_body); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 410 | pfncount = pfnsize / sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 411 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 412 | /* fill in the body */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 413 | while (pfnleft) { |
| 414 | if (pfnleft > pfncount) |
| 415 | pfncurr = pfncount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 416 | else |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 417 | pfncurr = pfnleft; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 418 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 419 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 420 | sizeof(struct vmbus_channel_gpadl_body) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 421 | pfncurr * sizeof(u64); |
| 422 | msgbody = kzalloc(msgsize, GFP_KERNEL); |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 423 | /* FIXME: we probably need to more if this fails */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 424 | if (!msgbody) |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 425 | goto nomem; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 426 | msgbody->msgsize = msgsize; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 427 | (*messagecount)++; |
| 428 | gpadl_body = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 429 | (struct vmbus_channel_gpadl_body *)msgbody->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 430 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 431 | /* |
| 432 | * FIXME: |
| 433 | * Gpadl is u32 and we are using a pointer which could |
| 434 | * be 64-bit |
| 435 | */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 436 | /* gpadl_body->Gpadl = kbuffer; */ |
| 437 | for (i = 0; i < pfncurr; i++) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 438 | gpadl_body->pfn[i] = pfn + pfnsum + i; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 439 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 440 | /* add to msg header */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 441 | list_add_tail(&msgbody->msglistentry, |
| 442 | &msgheader->submsglist); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 443 | pfnsum += pfncurr; |
| 444 | pfnleft -= pfncurr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 445 | } |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 446 | } else { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 447 | /* everything fits in a header */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 448 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 449 | sizeof(struct vmbus_channel_gpadl_header) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 450 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
| 451 | msgheader = kzalloc(msgsize, GFP_KERNEL); |
| 452 | if (msgheader == NULL) |
Kulikov Vasiliy | e3eb7cd | 2010-07-16 20:13:51 +0400 | [diff] [blame] | 453 | goto nomem; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 454 | msgheader->msgsize = msgsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 455 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 456 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 457 | msgheader->msg; |
| 458 | gpadl_header->rangecount = 1; |
| 459 | gpadl_header->range_buflen = sizeof(struct gpa_range) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 460 | pagecount * sizeof(u64); |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 461 | gpadl_header->range[0].byte_offset = 0; |
| 462 | gpadl_header->range[0].byte_count = size; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 463 | for (i = 0; i < pagecount; i++) |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 464 | gpadl_header->range[0].pfn_array[i] = pfn+i; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 465 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 466 | *msginfo = msgheader; |
| 467 | *messagecount = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | return 0; |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 471 | nomem: |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 472 | kfree(msgheader); |
| 473 | kfree(msgbody); |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 474 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 475 | } |
| 476 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 477 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 478 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 479 | * |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 480 | * @channel: a channel |
| 481 | * @kbuffer: from kmalloc |
| 482 | * @size: page-size multiple |
| 483 | * @gpadl_handle: some funky thing |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 484 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 485 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 486 | u32 size, u32 *gpadl_handle) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 487 | { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 488 | struct vmbus_channel_gpadl_header *gpadlmsg; |
| 489 | struct vmbus_channel_gpadl_body *gpadl_body; |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 490 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 491 | struct vmbus_channel_msginfo *msginfo = NULL; |
| 492 | struct vmbus_channel_msginfo *submsginfo; |
| 493 | u32 msgcount; |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 494 | struct list_head *curr; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 495 | u32 next_gpadl_handle; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 496 | unsigned long flags; |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 497 | int ret = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 498 | |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 499 | next_gpadl_handle = atomic_read(&vmbus_connection.next_gpadl_handle); |
| 500 | atomic_inc(&vmbus_connection.next_gpadl_handle); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 501 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 502 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 503 | if (ret) |
| 504 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 505 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 506 | init_waitqueue_head(&msginfo->waitevent); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 507 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 508 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg; |
| 509 | gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER; |
| 510 | gpadlmsg->child_relid = channel->offermsg.child_relid; |
| 511 | gpadlmsg->gpadl = next_gpadl_handle; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 512 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 513 | dump_gpadl_header(gpadlmsg); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 514 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 515 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 516 | list_add_tail(&msginfo->msglistentry, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 517 | &vmbus_connection.chn_msg_list); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 518 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 519 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 520 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 521 | msginfo->wait_condition = 0; |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 522 | ret = vmbus_post_msg(gpadlmsg, msginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 523 | sizeof(*msginfo)); |
Hank Janssen | 98e0870 | 2011-03-29 13:58:44 -0700 | [diff] [blame] | 524 | if (ret != 0) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 525 | goto Cleanup; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 526 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 527 | if (msgcount > 1) { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 528 | list_for_each(curr, &msginfo->submsglist) { |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 529 | |
| 530 | /* FIXME: should this use list_entry() instead ? */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 531 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
| 532 | gpadl_body = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 533 | (struct vmbus_channel_gpadl_body *)submsginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 534 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 535 | gpadl_body->header.msgtype = |
| 536 | CHANNELMSG_GPADL_BODY; |
| 537 | gpadl_body->gpadl = next_gpadl_handle; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 538 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 539 | dump_gpadl_body(gpadl_body, submsginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 540 | sizeof(*submsginfo)); |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 541 | ret = vmbus_post_msg(gpadl_body, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 542 | submsginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 543 | sizeof(*submsginfo)); |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 544 | if (ret != 0) |
Bill Pemberton | 9925915 | 2010-05-05 15:27:36 -0400 | [diff] [blame] | 545 | goto Cleanup; |
| 546 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 547 | } |
| 548 | } |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 549 | wait_event_timeout(msginfo->waitevent, |
| 550 | msginfo->wait_condition, |
| 551 | msecs_to_jiffies(1000)); |
| 552 | BUG_ON(msginfo->wait_condition == 0); |
| 553 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 554 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 555 | /* At this point, we received the gpadl created msg */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 556 | *gpadl_handle = gpadlmsg->gpadl; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 557 | |
| 558 | Cleanup: |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 559 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 560 | list_del(&msginfo->msglistentry); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 561 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 562 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 563 | kfree(msginfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 564 | return ret; |
| 565 | } |
Greg Kroah-Hartman | 9887372 | 2010-10-21 08:47:43 -0700 | [diff] [blame] | 566 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 567 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 568 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 569 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 570 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 571 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 572 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 573 | struct vmbus_channel_gpadl_teardown *msg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 574 | struct vmbus_channel_msginfo *info; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 575 | unsigned long flags; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 576 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 577 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 578 | /* ASSERT(gpadl_handle != 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 579 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 580 | info = kmalloc(sizeof(*info) + |
| 581 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 582 | if (!info) |
| 583 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 584 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 585 | init_waitqueue_head(&info->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 586 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 587 | msg = (struct vmbus_channel_gpadl_teardown *)info->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 588 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 589 | msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; |
| 590 | msg->child_relid = channel->offermsg.child_relid; |
| 591 | msg->gpadl = gpadl_handle; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 592 | |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 593 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 594 | list_add_tail(&info->msglistentry, |
Haiyang Zhang | da9fcb7 | 2011-01-26 12:12:14 -0800 | [diff] [blame] | 595 | &vmbus_connection.chn_msg_list); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 596 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 597 | info->wait_condition = 0; |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 598 | ret = vmbus_post_msg(msg, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 599 | sizeof(struct vmbus_channel_gpadl_teardown)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 600 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 601 | BUG_ON(ret != 0); |
| 602 | wait_event_timeout(info->waitevent, |
| 603 | info->wait_condition, msecs_to_jiffies(1000)); |
| 604 | BUG_ON(info->wait_condition == 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 605 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 606 | /* Received a torndown response */ |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 607 | spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 608 | list_del(&info->msglistentry); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 609 | spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 610 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 611 | kfree(info); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 612 | return ret; |
| 613 | } |
Greg Kroah-Hartman | 18726d7 | 2010-10-21 08:39:59 -0700 | [diff] [blame] | 614 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 615 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 616 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 617 | * vmbus_close - Close the specified channel |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 618 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 619 | void vmbus_close(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 620 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 621 | struct vmbus_channel_close_channel *msg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 622 | struct vmbus_channel_msginfo *info; |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 623 | unsigned long flags; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 624 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 625 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 626 | /* Stop callback and cancel the timer asap */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 627 | channel->onchannel_callback = NULL; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 628 | del_timer_sync(&channel->poll_timer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 629 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 630 | /* Send a closing message */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 631 | info = kmalloc(sizeof(*info) + |
| 632 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 633 | /* FIXME: can't do anything other than return here because the |
| 634 | * function is void */ |
| 635 | if (!info) |
| 636 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 637 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 638 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 639 | msg = (struct vmbus_channel_close_channel *)info->msg; |
| 640 | msg->header.msgtype = CHANNELMSG_CLOSECHANNEL; |
| 641 | msg->child_relid = channel->offermsg.child_relid; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 642 | |
Haiyang Zhang | c697767 | 2011-01-26 12:12:08 -0800 | [diff] [blame] | 643 | ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_close_channel)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 644 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 645 | BUG_ON(ret != 0); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 646 | /* Tear down the gpadl for the channel's ring buffer */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 647 | if (channel->ringbuffer_gpadlhandle) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 648 | vmbus_teardown_gpadl(channel, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 649 | channel->ringbuffer_gpadlhandle); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 650 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 651 | /* TODO: Send a msg to release the childRelId */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 652 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 653 | /* Cleanup the ring buffers for this channel */ |
K. Y. Srinivasan | 2dba688 | 2011-05-10 07:55:22 -0700 | [diff] [blame] | 654 | hv_ringbuffer_cleanup(&channel->outbound); |
| 655 | hv_ringbuffer_cleanup(&channel->inbound); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 656 | |
K. Y. Srinivasan | df3493e | 2011-02-11 09:59:00 -0800 | [diff] [blame] | 657 | free_pages((unsigned long)channel->ringbuffer_pages, |
| 658 | get_order(channel->ringbuffer_pagecount * PAGE_SIZE)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 659 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 660 | kfree(info); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 661 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 662 | /* |
| 663 | * If we are closing the channel during an error path in |
| 664 | * opening the channel, don't free the channel since the |
| 665 | * caller will free the channel |
| 666 | */ |
| 667 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 668 | if (channel->state == CHANNEL_OPEN_STATE) { |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 669 | spin_lock_irqsave(&vmbus_connection.channel_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 670 | list_del(&channel->listentry); |
Haiyang Zhang | 15b2f64 | 2011-01-26 12:12:07 -0800 | [diff] [blame] | 671 | spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 672 | |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 673 | free_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 674 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 675 | } |
Greg Kroah-Hartman | 70bfa30 | 2010-10-21 09:52:22 -0700 | [diff] [blame] | 676 | EXPORT_SYMBOL_GPL(vmbus_close); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 677 | |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 678 | /** |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 679 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 680 | * @channel: Pointer to vmbus_channel structure. |
| 681 | * @buffer: Pointer to the buffer you want to receive the data into. |
| 682 | * @bufferlen: Maximum size of what the the buffer will hold |
| 683 | * @requestid: Identifier of the request |
| 684 | * @type: Type of packet that is being send e.g. negotiate, time |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 685 | * packet etc. |
| 686 | * |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 687 | * Sends data in @buffer directly to hyper-v via the vmbus |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 688 | * This will send the data unparsed to hyper-v. |
| 689 | * |
| 690 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 691 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 692 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 693 | u32 bufferlen, u64 requestid, |
| 694 | enum vmbus_packet_type type, u32 flags) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 695 | { |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 696 | struct vmpacket_descriptor desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 697 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
Uwe Kleine-König | 7350968 | 2011-01-20 09:32:01 +0100 | [diff] [blame] | 698 | u32 packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 699 | struct scatterlist bufferlist[3]; |
| 700 | u64 aligned_data = 0; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 701 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 702 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 703 | dump_vmbus_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 704 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 705 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 706 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 707 | /* Setup the descriptor */ |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 708 | desc.type = type; /* VmbusPacketTypeDataInBand; */ |
| 709 | desc.flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 710 | /* in 8-bytes granularity */ |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 711 | desc.offset8 = sizeof(struct vmpacket_descriptor) >> 3; |
| 712 | desc.len8 = (u16)(packetlen_aligned >> 3); |
| 713 | desc.trans_id = requestid; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 714 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 715 | sg_init_table(bufferlist, 3); |
| 716 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); |
| 717 | sg_set_buf(&bufferlist[1], buffer, bufferlen); |
| 718 | sg_set_buf(&bufferlist[2], &aligned_data, |
| 719 | packetlen_aligned - packetlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 720 | |
K. Y. Srinivasan | 633c4dc | 2011-05-10 07:55:23 -0700 | [diff] [blame^] | 721 | ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 722 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 723 | /* TODO: We should determine if this is optional */ |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 724 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 725 | vmbus_setevent(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 726 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 727 | return ret; |
| 728 | } |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 729 | EXPORT_SYMBOL(vmbus_sendpacket); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 730 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 731 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 732 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 733 | * packets using a GPADL Direct packet type. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 734 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 735 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 736 | struct hv_page_buffer pagebuffers[], |
| 737 | u32 pagecount, void *buffer, u32 bufferlen, |
| 738 | u64 requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 739 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 740 | int ret; |
| 741 | int i; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 742 | struct vmbus_channel_packet_page_buffer desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 743 | u32 descsize; |
| 744 | u32 packetlen; |
| 745 | u32 packetlen_aligned; |
| 746 | struct scatterlist bufferlist[3]; |
| 747 | u64 aligned_data = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 748 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 749 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
Bill Pemberton | 002b53e | 2010-05-05 15:27:39 -0400 | [diff] [blame] | 750 | return -EINVAL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 751 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 752 | dump_vmbus_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 753 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 754 | /* |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 755 | * Adjust the size down since vmbus_channel_packet_page_buffer is the |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 756 | * largest size we support |
| 757 | */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 758 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
| 759 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 760 | sizeof(struct hv_page_buffer)); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 761 | packetlen = descsize + bufferlen; |
Uwe Kleine-König | 7350968 | 2011-01-20 09:32:01 +0100 | [diff] [blame] | 762 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 763 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 764 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 765 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 766 | /* Setup the descriptor */ |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 767 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 768 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 769 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
| 770 | desc.length8 = (u16)(packetlen_aligned >> 3); |
| 771 | desc.transactionid = requestid; |
| 772 | desc.rangecount = pagecount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 773 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 774 | for (i = 0; i < pagecount; i++) { |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 775 | desc.range[i].len = pagebuffers[i].len; |
| 776 | desc.range[i].offset = pagebuffers[i].offset; |
| 777 | desc.range[i].pfn = pagebuffers[i].pfn; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 778 | } |
| 779 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 780 | sg_init_table(bufferlist, 3); |
| 781 | sg_set_buf(&bufferlist[0], &desc, descsize); |
| 782 | sg_set_buf(&bufferlist[1], buffer, bufferlen); |
| 783 | sg_set_buf(&bufferlist[2], &aligned_data, |
| 784 | packetlen_aligned - packetlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 785 | |
K. Y. Srinivasan | 633c4dc | 2011-05-10 07:55:23 -0700 | [diff] [blame^] | 786 | ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 787 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 788 | /* TODO: We should determine if this is optional */ |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 789 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 790 | vmbus_setevent(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 791 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 792 | return ret; |
| 793 | } |
Greg Kroah-Hartman | 713efeb | 2010-10-21 09:29:54 -0700 | [diff] [blame] | 794 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 795 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 796 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 797 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 798 | * using a GPADL Direct packet type. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 799 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 800 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 801 | struct hv_multipage_buffer *multi_pagebuffer, |
| 802 | void *buffer, u32 bufferlen, u64 requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 803 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 804 | int ret; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 805 | struct vmbus_channel_packet_multipage_buffer desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 806 | u32 descsize; |
| 807 | u32 packetlen; |
| 808 | u32 packetlen_aligned; |
| 809 | struct scatterlist bufferlist[3]; |
| 810 | u64 aligned_data = 0; |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 811 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, |
| 812 | multi_pagebuffer->len); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 813 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 814 | dump_vmbus_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 815 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 816 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
Bill Pemberton | 002b53e | 2010-05-05 15:27:39 -0400 | [diff] [blame] | 817 | return -EINVAL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 818 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 819 | /* |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 820 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 821 | * the largest size we support |
| 822 | */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 823 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
| 824 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 825 | sizeof(u64)); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 826 | packetlen = descsize + bufferlen; |
Uwe Kleine-König | 7350968 | 2011-01-20 09:32:01 +0100 | [diff] [blame] | 827 | packetlen_aligned = ALIGN(packetlen, sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 828 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 829 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 830 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 831 | /* Setup the descriptor */ |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 832 | desc.type = VM_PKT_DATA_USING_GPA_DIRECT; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 833 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 834 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
| 835 | desc.length8 = (u16)(packetlen_aligned >> 3); |
| 836 | desc.transactionid = requestid; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 837 | desc.rangecount = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 838 | |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 839 | desc.range.len = multi_pagebuffer->len; |
| 840 | desc.range.offset = multi_pagebuffer->offset; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 841 | |
Haiyang Zhang | ca623ad | 2011-01-26 12:12:11 -0800 | [diff] [blame] | 842 | memcpy(desc.range.pfn_array, multi_pagebuffer->pfn_array, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 843 | pfncount * sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 844 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 845 | sg_init_table(bufferlist, 3); |
| 846 | sg_set_buf(&bufferlist[0], &desc, descsize); |
| 847 | sg_set_buf(&bufferlist[1], buffer, bufferlen); |
| 848 | sg_set_buf(&bufferlist[2], &aligned_data, |
| 849 | packetlen_aligned - packetlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 850 | |
K. Y. Srinivasan | 633c4dc | 2011-05-10 07:55:23 -0700 | [diff] [blame^] | 851 | ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 852 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 853 | /* TODO: We should determine if this is optional */ |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 854 | if (ret == 0 && !get_ringbuffer_interrupt_mask(&channel->outbound)) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 855 | vmbus_setevent(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 856 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 857 | return ret; |
| 858 | } |
Greg Kroah-Hartman | 4cb106f | 2010-10-21 09:23:59 -0700 | [diff] [blame] | 859 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 860 | |
| 861 | /** |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 862 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 863 | * @channel: Pointer to vmbus_channel structure. |
| 864 | * @buffer: Pointer to the buffer you want to receive the data into. |
| 865 | * @bufferlen: Maximum size of what the the buffer will hold |
| 866 | * @buffer_actual_len: The actual size of the data after it was received |
| 867 | * @requestid: Identifier of the request |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 868 | * |
| 869 | * Receives directly from the hyper-v vmbus and puts the data it received |
| 870 | * into Buffer. This will receive the data unparsed from hyper-v. |
| 871 | * |
| 872 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 873 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 874 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 875 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 876 | { |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 877 | struct vmpacket_descriptor desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 878 | u32 packetlen; |
| 879 | u32 userlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 880 | int ret; |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 881 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 882 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 883 | *buffer_actual_len = 0; |
| 884 | *requestid = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 885 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 886 | spin_lock_irqsave(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 887 | |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 888 | ret = ringbuffer_peek(&channel->inbound, &desc, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 889 | sizeof(struct vmpacket_descriptor)); |
| 890 | if (ret != 0) { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 891 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 892 | return 0; |
| 893 | } |
| 894 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 895 | /* VmbusChannelClearEvent(Channel); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 896 | |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 897 | packetlen = desc.len8 << 3; |
| 898 | userlen = packetlen - (desc.offset8 << 3); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 899 | /* ASSERT(userLen > 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 900 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 901 | *buffer_actual_len = userlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 902 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 903 | if (userlen > bufferlen) { |
| 904 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 905 | |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 906 | pr_err("Buffer too small - got %d needs %d\n", |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 907 | bufferlen, userlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 908 | return -1; |
| 909 | } |
| 910 | |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 911 | *requestid = desc.trans_id; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 912 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 913 | /* Copy over the packet to the user buffer */ |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 914 | ret = ringbuffer_read(&channel->inbound, buffer, userlen, |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 915 | (desc.offset8 << 3)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 916 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 917 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 918 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 919 | return 0; |
| 920 | } |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 921 | EXPORT_SYMBOL(vmbus_recvpacket); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 922 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 923 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 924 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 925 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 926 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 927 | u32 bufferlen, u32 *buffer_actual_len, |
| 928 | u64 *requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 929 | { |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 930 | struct vmpacket_descriptor desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 931 | u32 packetlen; |
| 932 | u32 userlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 933 | int ret; |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 934 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 935 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 936 | *buffer_actual_len = 0; |
| 937 | *requestid = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 938 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 939 | spin_lock_irqsave(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 940 | |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 941 | ret = ringbuffer_peek(&channel->inbound, &desc, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 942 | sizeof(struct vmpacket_descriptor)); |
| 943 | if (ret != 0) { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 944 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 945 | return 0; |
| 946 | } |
| 947 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 948 | /* VmbusChannelClearEvent(Channel); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 949 | |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 950 | packetlen = desc.len8 << 3; |
| 951 | userlen = packetlen - (desc.offset8 << 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 952 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 953 | *buffer_actual_len = packetlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 954 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 955 | if (packetlen > bufferlen) { |
| 956 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 957 | |
Hank Janssen | 0a46618 | 2011-03-29 13:58:47 -0700 | [diff] [blame] | 958 | pr_err("Buffer too small - needed %d bytes but " |
| 959 | "got space for only %d bytes\n", |
| 960 | packetlen, bufferlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 961 | return -2; |
| 962 | } |
| 963 | |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 964 | *requestid = desc.trans_id; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 965 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 966 | /* Copy over the entire packet to the user buffer */ |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 967 | ret = ringbuffer_read(&channel->inbound, buffer, packetlen, 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 968 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 969 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 970 | return 0; |
| 971 | } |
Greg Kroah-Hartman | adaee6b | 2010-10-21 09:09:23 -0700 | [diff] [blame] | 972 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 973 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 974 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 975 | * vmbus_onchannel_event - Channel event callback |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 976 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 977 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 978 | { |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 979 | dump_vmbus_channel(channel); |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 980 | /* ASSERT(Channel->OnChannelCallback); */ |
Haiyang Zhang | 5996b3d | 2009-11-20 16:29:17 +0000 | [diff] [blame] | 981 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 982 | channel->onchannel_callback(channel->channel_callback_context); |
Haiyang Zhang | 5996b3d | 2009-11-20 16:29:17 +0000 | [diff] [blame] | 983 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 984 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 985 | } |
| 986 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 987 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 988 | * vmbus_ontimer - Timer event callback |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 989 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 990 | void vmbus_ontimer(unsigned long data) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 991 | { |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 992 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 993 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 994 | if (channel->onchannel_callback) |
| 995 | channel->onchannel_callback(channel->channel_callback_context); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 996 | } |
| 997 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 998 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 999 | * dump_vmbus_channel- Dump vmbus channel info to the console |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 1000 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1001 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1002 | { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 1003 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->offermsg.child_relid); |
Haiyang Zhang | 1ac5864 | 2010-11-08 14:04:47 -0800 | [diff] [blame] | 1004 | dump_ring_info(&channel->outbound, "Outbound "); |
| 1005 | dump_ring_info(&channel->inbound, "Inbound "); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1006 | } |