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 | */ |
Greg Kroah-Hartman | 5654e93 | 2009-07-14 15:08:20 -0700 | [diff] [blame] | 21 | #include <linux/kernel.h> |
Greg Kroah-Hartman | a0086dc | 2009-08-17 17:22:08 -0700 | [diff] [blame] | 22 | #include <linux/mm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
Greg Kroah-Hartman | 4983b39 | 2009-08-19 16:14:47 -0700 | [diff] [blame] | 25 | #include "osd.h" |
Greg Kroah-Hartman | 645954c | 2009-08-28 16:22:59 -0700 | [diff] [blame] | 26 | #include "logging.h" |
Greg Kroah-Hartman | 72daf32 | 2010-05-05 22:45:25 -0700 | [diff] [blame] | 27 | #include "vmbus_private.h" |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 28 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 29 | /* Internal routines */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 30 | static int create_gpadl_header( |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 31 | void *kbuffer, /* must be phys and virt contiguous */ |
| 32 | u32 size, /* page-size multiple */ |
| 33 | struct vmbus_channel_msginfo **msginfo, |
| 34 | u32 *messagecount); |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 35 | static void dump_vmbus_channel(struct vmbus_channel *channel); |
| 36 | static void vmbus_setevent(struct vmbus_channel *channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 37 | |
| 38 | |
| 39 | #if 0 |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 40 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 41 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 42 | int i = 0; |
| 43 | int j = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 44 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 45 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 46 | MonitorPage, MonitorPage->trigger_state); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 47 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 48 | for (i = 0; i < 4; i++) |
| 49 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 50 | MonitorPage->trigger_group[i].as_uint64); |
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 | for (i = 0; i < 4; i++) { |
| 53 | for (j = 0; j < 32; j++) { |
| 54 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 55 | MonitorPage->latency[i][j]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 56 | } |
| 57 | } |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 58 | for (i = 0; i < 4; i++) { |
| 59 | for (j = 0; j < 32; j++) { |
| 60 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 61 | MonitorPage->parameter[i][j].connectionid.asu32); |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 62 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 63 | MonitorPage->parameter[i][j].flag_number); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 64 | } |
| 65 | } |
| 66 | } |
| 67 | #endif |
| 68 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 69 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 70 | * vmbus_setevent- Trigger an event notification on the specified |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 71 | * channel. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 72 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 73 | static void vmbus_setevent(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 74 | { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 75 | struct hv_monitor_page *monitorpage; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 76 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 77 | if (channel->offermsg.monitor_allocated) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 78 | /* Each u32 represents 32 channels */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 79 | set_bit(channel->offermsg.child_relid & 31, |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 80 | (unsigned long *) gVmbusConnection.SendInterruptPage + |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 81 | (channel->offermsg.child_relid >> 5)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 82 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 83 | monitorpage = gVmbusConnection.MonitorPages; |
| 84 | monitorpage++; /* Get the child to parent monitor page */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 85 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 86 | set_bit(channel->monitor_bit, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 87 | (unsigned long *)&monitorpage->trigger_group |
| 88 | [channel->monitor_grp].pending); |
Bill Pemberton | 7c369f4 | 2009-07-29 17:00:11 -0400 | [diff] [blame] | 89 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 90 | } else { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 91 | VmbusSetEvent(channel->offermsg.child_relid); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 92 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | #if 0 |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 96 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 97 | { |
Greg Kroah-Hartman | eacb1b4 | 2009-08-20 12:11:26 -0700 | [diff] [blame] | 98 | struct hv_monitor_page *monitorPage; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 99 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 100 | if (Channel->offermsg.monitor_allocated) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 101 | /* Each u32 represents 32 channels */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 102 | clear_bit(Channel->offermsg.child_relid & 31, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 103 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 104 | (Channel->offermsg.child_relid >> 5)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 105 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 106 | monitorPage = |
| 107 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 108 | monitorPage++; /* Get the child to parent monitor page */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 109 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 110 | clear_bit(Channel->monitor_bit, |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 111 | (unsigned long *)&monitorPage->trigger_group |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 112 | [Channel->monitor_grp].Pending); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 113 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | #endif |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 117 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 118 | * vmbus_get_debug_info -Retrieve various channel debug info |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 119 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 120 | void vmbus_get_debug_info(struct vmbus_channel *channel, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 121 | struct vmbus_channel_debug_info *debuginfo) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 122 | { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 123 | struct hv_monitor_page *monitorpage; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 124 | u8 monitor_group = (u8)channel->offermsg.monitorid / 32; |
| 125 | u8 monitor_offset = (u8)channel->offermsg.monitorid % 32; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 126 | /* u32 monitorBit = 1 << monitorOffset; */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 127 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 128 | debuginfo->relid = channel->offermsg.child_relid; |
| 129 | debuginfo->state = channel->state; |
| 130 | memcpy(&debuginfo->interfacetype, |
| 131 | &channel->offermsg.offer.InterfaceType, sizeof(struct hv_guid)); |
| 132 | memcpy(&debuginfo->interface_instance, |
| 133 | &channel->offermsg.offer.InterfaceInstance, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 134 | sizeof(struct hv_guid)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 135 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 136 | monitorpage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 137 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 138 | debuginfo->monitorid = channel->offermsg.monitorid; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 139 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 140 | debuginfo->servermonitor_pending = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 141 | monitorpage->trigger_group[monitor_group].pending; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 142 | debuginfo->servermonitor_latency = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 143 | monitorpage->latency[monitor_group][monitor_offset]; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 144 | debuginfo->servermonitor_connectionid = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 145 | monitorpage->parameter[monitor_group] |
| 146 | [monitor_offset].connectionid.u.id; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 147 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 148 | monitorpage++; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 149 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 150 | debuginfo->clientmonitor_pending = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 151 | monitorpage->trigger_group[monitor_group].pending; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 152 | debuginfo->clientmonitor_latency = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 153 | monitorpage->latency[monitor_group][monitor_offset]; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 154 | debuginfo->clientmonitor_connectionid = |
Haiyang Zhang | f6feebe | 2010-11-08 14:04:39 -0800 | [diff] [blame^] | 155 | monitorpage->parameter[monitor_group] |
| 156 | [monitor_offset].connectionid.u.id; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 157 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 158 | RingBufferGetDebugInfo(&channel->inbound, &debuginfo->inbound); |
| 159 | RingBufferGetDebugInfo(&channel->outbound, &debuginfo->outbound); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 160 | } |
| 161 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 162 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 163 | * vmbus_open - Open the specified channel. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 164 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 165 | int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 166 | u32 recv_ringbuffer_size, void *userdata, u32 userdatalen, |
| 167 | void (*onchannelcallback)(void *context), void *context) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 168 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 169 | struct vmbus_channel_open_channel *openMsg; |
Bill Pemberton | b94ef34 | 2010-05-05 15:27:37 -0400 | [diff] [blame] | 170 | struct vmbus_channel_msginfo *openInfo = NULL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 171 | void *in, *out; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 172 | unsigned long flags; |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 173 | int ret, err = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 174 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 175 | /* Aligned to page size */ |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 176 | /* ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); */ |
| 177 | /* ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 178 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 179 | newchannel->onchannel_callback = onchannelcallback; |
| 180 | newchannel->channel_callback_context = context; |
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 | /* Allocate the ring buffer */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 183 | out = osd_PageAlloc((send_ringbuffer_size + recv_ringbuffer_size) |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 184 | >> PAGE_SHIFT); |
Bill Pemberton | 7e052d9 | 2010-05-05 15:27:30 -0400 | [diff] [blame] | 185 | if (!out) |
| 186 | return -ENOMEM; |
| 187 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 188 | /* ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 189 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 190 | in = (void *)((unsigned long)out + send_ringbuffer_size); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 191 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 192 | newchannel->ringbuffer_pages = out; |
| 193 | newchannel->ringbuffer_pagecount = (send_ringbuffer_size + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 194 | recv_ringbuffer_size) >> PAGE_SHIFT; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 195 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 196 | ret = RingBufferInit(&newchannel->outbound, out, send_ringbuffer_size); |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 197 | if (ret != 0) { |
Bill Pemberton | 3324fb4 | 2010-05-05 15:27:49 -0400 | [diff] [blame] | 198 | err = ret; |
| 199 | goto errorout; |
| 200 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 201 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 202 | ret = RingBufferInit(&newchannel->inbound, in, recv_ringbuffer_size); |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 203 | if (ret != 0) { |
Bill Pemberton | 3324fb4 | 2010-05-05 15:27:49 -0400 | [diff] [blame] | 204 | err = ret; |
| 205 | goto errorout; |
| 206 | } |
| 207 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 208 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 209 | /* Establish the gpadl for the ring buffer */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 210 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 211 | newchannel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 212 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 213 | newchannel->ringbuffer_gpadlhandle = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 214 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 215 | ret = vmbus_establish_gpadl(newchannel, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 216 | newchannel->outbound.RingBuffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 217 | send_ringbuffer_size + |
| 218 | recv_ringbuffer_size, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 219 | &newchannel->ringbuffer_gpadlhandle); |
Bill Pemberton | b94ef34 | 2010-05-05 15:27:37 -0400 | [diff] [blame] | 220 | |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 221 | if (ret != 0) { |
Bill Pemberton | b94ef34 | 2010-05-05 15:27:37 -0400 | [diff] [blame] | 222 | err = ret; |
| 223 | goto errorout; |
| 224 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 225 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 226 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " |
| 227 | "size %d recv ring %p size %d, downstreamoffset %d>", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 228 | newchannel, newchannel->offermsg.child_relid, |
| 229 | newchannel->ringbuffer_gpadlhandle, |
| 230 | newchannel->outbound.RingBuffer, |
| 231 | newchannel->outbound.RingSize, |
| 232 | newchannel->inbound.RingBuffer, |
| 233 | newchannel->inbound.RingSize, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 234 | send_ringbuffer_size); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 235 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 236 | /* Create and init the channel open message */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 237 | openInfo = kmalloc(sizeof(*openInfo) + |
| 238 | sizeof(struct vmbus_channel_open_channel), |
| 239 | GFP_KERNEL); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 240 | if (!openInfo) { |
| 241 | err = -ENOMEM; |
| 242 | goto errorout; |
| 243 | } |
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 | openInfo->waitevent = osd_WaitEventCreate(); |
| 246 | if (!openInfo->waitevent) { |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 247 | err = -ENOMEM; |
| 248 | goto errorout; |
| 249 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 250 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 251 | openMsg = (struct vmbus_channel_open_channel *)openInfo->msg; |
| 252 | openMsg->header.msgtype = CHANNELMSG_OPENCHANNEL; |
| 253 | openMsg->openid = newchannel->offermsg.child_relid; /* FIXME */ |
| 254 | openMsg->child_relid = newchannel->offermsg.child_relid; |
| 255 | openMsg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; |
| 256 | openMsg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >> |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 257 | PAGE_SHIFT; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 258 | openMsg->server_contextarea_gpadlhandle = 0; /* TODO */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 259 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 260 | if (userdatalen > MAX_USER_DEFINED_BYTES) { |
Bill Pemberton | c827f94 | 2010-05-05 15:27:38 -0400 | [diff] [blame] | 261 | err = -EINVAL; |
| 262 | goto errorout; |
| 263 | } |
| 264 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 265 | if (userdatalen) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 266 | memcpy(openMsg->userdata, userdata, userdatalen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 267 | |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 268 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 269 | list_add_tail(&openInfo->msglistentry, |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 270 | &gVmbusConnection.ChannelMsgList); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 271 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 272 | |
| 273 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); |
| 274 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 275 | ret = VmbusPostMessage(openMsg, |
| 276 | sizeof(struct vmbus_channel_open_channel)); |
| 277 | if (ret != 0) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 278 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
| 279 | goto Cleanup; |
| 280 | } |
| 281 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 282 | /* FIXME: Need to time-out here */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 283 | osd_WaitEventWait(openInfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 284 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 285 | if (openInfo->response.open_result.status == 0) |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 286 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", newchannel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 287 | else |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 288 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 289 | newchannel, openInfo->response.open_result.status); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 290 | |
| 291 | Cleanup: |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 292 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 293 | list_del(&openInfo->msglistentry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 294 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 295 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 296 | kfree(openInfo->waitevent); |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 297 | kfree(openInfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 298 | return 0; |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 299 | |
| 300 | errorout: |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 301 | RingBufferCleanup(&newchannel->outbound); |
| 302 | RingBufferCleanup(&newchannel->inbound); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 303 | osd_PageFree(out, (send_ringbuffer_size + recv_ringbuffer_size) |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 304 | >> PAGE_SHIFT); |
| 305 | kfree(openInfo); |
| 306 | return err; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 307 | } |
Greg Kroah-Hartman | 36ceadf | 2010-10-21 09:58:21 -0700 | [diff] [blame] | 308 | EXPORT_SYMBOL_GPL(vmbus_open); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 309 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 310 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 311 | * dump_gpadl_body - Dump the gpadl body message to the console for |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 312 | * debugging purposes. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 313 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 314 | 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] | 315 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 316 | int i; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 317 | int pfncount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 318 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 319 | pfncount = (len - sizeof(struct vmbus_channel_gpadl_body)) / |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 320 | sizeof(u64); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 321 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", len, pfncount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 322 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 323 | for (i = 0; i < pfncount; i++) |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 324 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 325 | i, gpadl->pfn[i]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 328 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 329 | * dump_gpadl_header - Dump the gpadl header message to the console for |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 330 | * debugging purposes. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 331 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 332 | static void dump_gpadl_header(struct vmbus_channel_gpadl_header *gpadl) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 333 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 334 | int i, j; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 335 | int pagecount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 336 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 337 | DPRINT_DBG(VMBUS, |
| 338 | "gpadl header - relid %d, range count %d, range buflen %d", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 339 | gpadl->child_relid, gpadl->rangecount, gpadl->range_buflen); |
| 340 | for (i = 0; i < gpadl->rangecount; i++) { |
| 341 | pagecount = gpadl->range[i].ByteCount >> PAGE_SHIFT; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 342 | pagecount = (pagecount > 26) ? 26 : pagecount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 343 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 344 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 345 | "page count %d", i, gpadl->range[i].ByteCount, |
| 346 | gpadl->range[i].ByteOffset, pagecount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 347 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 348 | for (j = 0; j < pagecount; j++) |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 349 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 350 | gpadl->range[i].PfnArray[j]); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 351 | } |
| 352 | } |
| 353 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 354 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 355 | * create_gpadl_header - Creates a gpadl for the specified buffer |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 356 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 357 | static int create_gpadl_header(void *kbuffer, u32 size, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 358 | struct vmbus_channel_msginfo **msginfo, |
| 359 | u32 *messagecount) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 360 | { |
| 361 | int i; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 362 | int pagecount; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 363 | unsigned long long pfn; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 364 | struct vmbus_channel_gpadl_header *gpadl_header; |
| 365 | struct vmbus_channel_gpadl_body *gpadl_body; |
| 366 | struct vmbus_channel_msginfo *msgheader; |
| 367 | struct vmbus_channel_msginfo *msgbody = NULL; |
| 368 | u32 msgsize; |
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 | int pfnsum, pfncount, pfnleft, pfncurr, pfnsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 371 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 372 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 373 | /* ASSERT((Size & (PAGE_SIZE-1)) == 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 374 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 375 | pagecount = size >> PAGE_SHIFT; |
| 376 | pfn = virt_to_phys(kbuffer) >> PAGE_SHIFT; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 377 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 378 | /* do we need a gpadl body msg */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 379 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 380 | sizeof(struct vmbus_channel_gpadl_header) - |
| 381 | sizeof(struct gpa_range); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 382 | pfncount = pfnsize / sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 383 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 384 | if (pagecount > pfncount) { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 385 | /* we need a gpadl body */ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 386 | /* fill in the header */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 387 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 388 | sizeof(struct vmbus_channel_gpadl_header) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 389 | sizeof(struct gpa_range) + pfncount * sizeof(u64); |
| 390 | msgheader = kzalloc(msgsize, GFP_KERNEL); |
| 391 | if (!msgheader) |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 392 | goto nomem; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 393 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 394 | INIT_LIST_HEAD(&msgheader->submsglist); |
| 395 | msgheader->msgsize = msgsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 396 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 397 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 398 | msgheader->msg; |
| 399 | gpadl_header->rangecount = 1; |
| 400 | gpadl_header->range_buflen = sizeof(struct gpa_range) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 401 | pagecount * sizeof(u64); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 402 | gpadl_header->range[0].ByteOffset = 0; |
| 403 | gpadl_header->range[0].ByteCount = size; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 404 | for (i = 0; i < pfncount; i++) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 405 | gpadl_header->range[0].PfnArray[i] = pfn+i; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 406 | *msginfo = msgheader; |
| 407 | *messagecount = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 408 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 409 | pfnsum = pfncount; |
| 410 | pfnleft = pagecount - pfncount; |
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 | /* how many pfns can we fit */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 413 | pfnsize = MAX_SIZE_CHANNEL_MESSAGE - |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 414 | sizeof(struct vmbus_channel_gpadl_body); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 415 | pfncount = pfnsize / sizeof(u64); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 416 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 417 | /* fill in the body */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 418 | while (pfnleft) { |
| 419 | if (pfnleft > pfncount) |
| 420 | pfncurr = pfncount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 421 | else |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 422 | pfncurr = pfnleft; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 423 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 424 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 425 | sizeof(struct vmbus_channel_gpadl_body) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 426 | pfncurr * sizeof(u64); |
| 427 | msgbody = kzalloc(msgsize, GFP_KERNEL); |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 428 | /* FIXME: we probably need to more if this fails */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 429 | if (!msgbody) |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 430 | goto nomem; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 431 | msgbody->msgsize = msgsize; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 432 | (*messagecount)++; |
| 433 | gpadl_body = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 434 | (struct vmbus_channel_gpadl_body *)msgbody->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 435 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 436 | /* |
| 437 | * FIXME: |
| 438 | * Gpadl is u32 and we are using a pointer which could |
| 439 | * be 64-bit |
| 440 | */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 441 | /* gpadl_body->Gpadl = kbuffer; */ |
| 442 | for (i = 0; i < pfncurr; i++) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 443 | gpadl_body->pfn[i] = pfn + pfnsum + i; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 444 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 445 | /* add to msg header */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 446 | list_add_tail(&msgbody->msglistentry, |
| 447 | &msgheader->submsglist); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 448 | pfnsum += pfncurr; |
| 449 | pfnleft -= pfncurr; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 450 | } |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 451 | } else { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 452 | /* everything fits in a header */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 453 | msgsize = sizeof(struct vmbus_channel_msginfo) + |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 454 | sizeof(struct vmbus_channel_gpadl_header) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 455 | sizeof(struct gpa_range) + pagecount * sizeof(u64); |
| 456 | msgheader = kzalloc(msgsize, GFP_KERNEL); |
| 457 | if (msgheader == NULL) |
Kulikov Vasiliy | e3eb7cd | 2010-07-16 20:13:51 +0400 | [diff] [blame] | 458 | goto nomem; |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 459 | msgheader->msgsize = msgsize; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 460 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 461 | gpadl_header = (struct vmbus_channel_gpadl_header *) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 462 | msgheader->msg; |
| 463 | gpadl_header->rangecount = 1; |
| 464 | gpadl_header->range_buflen = sizeof(struct gpa_range) + |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 465 | pagecount * sizeof(u64); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 466 | gpadl_header->range[0].ByteOffset = 0; |
| 467 | gpadl_header->range[0].ByteCount = size; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 468 | for (i = 0; i < pagecount; i++) |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 469 | gpadl_header->range[0].PfnArray[i] = pfn+i; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 470 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 471 | *msginfo = msgheader; |
| 472 | *messagecount = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | return 0; |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 476 | nomem: |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 477 | kfree(msgheader); |
| 478 | kfree(msgbody); |
Bill Pemberton | d1c250b | 2010-05-05 15:27:35 -0400 | [diff] [blame] | 479 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 482 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 483 | * vmbus_establish_gpadl - Estabish a GPADL for the specified buffer |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 484 | * |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 485 | * @channel: a channel |
| 486 | * @kbuffer: from kmalloc |
| 487 | * @size: page-size multiple |
| 488 | * @gpadl_handle: some funky thing |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 489 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 490 | int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 491 | u32 size, u32 *gpadl_handle) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 492 | { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 493 | struct vmbus_channel_gpadl_header *gpadlmsg; |
| 494 | struct vmbus_channel_gpadl_body *gpadl_body; |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 495 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 496 | struct vmbus_channel_msginfo *msginfo = NULL; |
| 497 | struct vmbus_channel_msginfo *submsginfo; |
| 498 | u32 msgcount; |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 499 | struct list_head *curr; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 500 | u32 next_gpadl_handle; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 501 | unsigned long flags; |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 502 | int ret = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 503 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 504 | next_gpadl_handle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
Bill Pemberton | f488841 | 2009-07-29 17:00:12 -0400 | [diff] [blame] | 505 | atomic_inc(&gVmbusConnection.NextGpadlHandle); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 506 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 507 | ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 508 | if (ret) |
| 509 | return ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 510 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 511 | msginfo->waitevent = osd_WaitEventCreate(); |
| 512 | if (!msginfo->waitevent) { |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 513 | ret = -ENOMEM; |
| 514 | goto Cleanup; |
| 515 | } |
| 516 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 517 | gpadlmsg = (struct vmbus_channel_gpadl_header *)msginfo->msg; |
| 518 | gpadlmsg->header.msgtype = CHANNELMSG_GPADL_HEADER; |
| 519 | gpadlmsg->child_relid = channel->offermsg.child_relid; |
| 520 | gpadlmsg->gpadl = next_gpadl_handle; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 521 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 522 | dump_gpadl_header(gpadlmsg); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 523 | |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 524 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 525 | list_add_tail(&msginfo->msglistentry, |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 526 | &gVmbusConnection.ChannelMsgList); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 527 | |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 528 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 529 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 530 | kbuffer, size, msgcount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 531 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 532 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 533 | msginfo->msgsize - sizeof(*msginfo)); |
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 | ret = VmbusPostMessage(gpadlmsg, msginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 536 | sizeof(*msginfo)); |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 537 | if (ret != 0) { |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 538 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
| 539 | goto Cleanup; |
| 540 | } |
| 541 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 542 | if (msgcount > 1) { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 543 | list_for_each(curr, &msginfo->submsglist) { |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 544 | |
| 545 | /* FIXME: should this use list_entry() instead ? */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 546 | submsginfo = (struct vmbus_channel_msginfo *)curr; |
| 547 | gpadl_body = |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 548 | (struct vmbus_channel_gpadl_body *)submsginfo->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 549 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 550 | gpadl_body->header.msgtype = |
| 551 | CHANNELMSG_GPADL_BODY; |
| 552 | gpadl_body->gpadl = next_gpadl_handle; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 553 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 554 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 555 | submsginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 556 | sizeof(*submsginfo)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 557 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 558 | dump_gpadl_body(gpadl_body, submsginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 559 | sizeof(*submsginfo)); |
| 560 | ret = VmbusPostMessage(gpadl_body, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 561 | submsginfo->msgsize - |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 562 | sizeof(*submsginfo)); |
Haiyang Zhang | fd4dc88 | 2010-05-13 15:56:30 +0000 | [diff] [blame] | 563 | if (ret != 0) |
Bill Pemberton | 9925915 | 2010-05-05 15:27:36 -0400 | [diff] [blame] | 564 | goto Cleanup; |
| 565 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 566 | } |
| 567 | } |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 568 | osd_WaitEventWait(msginfo->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 569 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 570 | /* At this point, we received the gpadl created msg */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 571 | DPRINT_DBG(VMBUS, "Received GPADL created " |
| 572 | "(relid %d, status %d handle %x)", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 573 | channel->offermsg.child_relid, |
| 574 | msginfo->response.gpadl_created.creation_status, |
| 575 | gpadlmsg->gpadl); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 576 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 577 | *gpadl_handle = gpadlmsg->gpadl; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 578 | |
| 579 | Cleanup: |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 580 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 581 | list_del(&msginfo->msglistentry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 582 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 583 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 584 | kfree(msginfo->waitevent); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 585 | kfree(msginfo); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 586 | return ret; |
| 587 | } |
Greg Kroah-Hartman | 9887372 | 2010-10-21 08:47:43 -0700 | [diff] [blame] | 588 | EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 589 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 590 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 591 | * vmbus_teardown_gpadl -Teardown the specified GPADL handle |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 592 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 593 | int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 594 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 595 | struct vmbus_channel_gpadl_teardown *msg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 596 | struct vmbus_channel_msginfo *info; |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 597 | unsigned long flags; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 598 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 599 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 600 | /* ASSERT(gpadl_handle != 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 601 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 602 | info = kmalloc(sizeof(*info) + |
| 603 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 604 | if (!info) |
| 605 | return -ENOMEM; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 606 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 607 | info->waitevent = osd_WaitEventCreate(); |
| 608 | if (!info->waitevent) { |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 609 | kfree(info); |
| 610 | return -ENOMEM; |
| 611 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 612 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 613 | msg = (struct vmbus_channel_gpadl_teardown *)info->msg; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 614 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 615 | msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; |
| 616 | msg->child_relid = channel->offermsg.child_relid; |
| 617 | msg->gpadl = gpadl_handle; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 618 | |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 619 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 620 | list_add_tail(&info->msglistentry, |
Bill Pemberton | 53af545 | 2009-09-11 21:46:44 -0400 | [diff] [blame] | 621 | &gVmbusConnection.ChannelMsgList); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 622 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 623 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 624 | ret = VmbusPostMessage(msg, |
| 625 | sizeof(struct vmbus_channel_gpadl_teardown)); |
| 626 | if (ret != 0) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 627 | /* TODO: */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 628 | /* something... */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 629 | } |
| 630 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 631 | osd_WaitEventWait(info->waitevent); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 632 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 633 | /* Received a torndown response */ |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 634 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 635 | list_del(&info->msglistentry); |
Greg Kroah-Hartman | dd0813b | 2009-07-15 14:56:45 -0700 | [diff] [blame] | 636 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 637 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 638 | kfree(info->waitevent); |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 639 | kfree(info); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 640 | return ret; |
| 641 | } |
Greg Kroah-Hartman | 18726d7 | 2010-10-21 08:39:59 -0700 | [diff] [blame] | 642 | EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 643 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 644 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 645 | * vmbus_close - Close the specified channel |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 646 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 647 | void vmbus_close(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 648 | { |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 649 | struct vmbus_channel_close_channel *msg; |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 650 | struct vmbus_channel_msginfo *info; |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 651 | unsigned long flags; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 652 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 653 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 654 | /* Stop callback and cancel the timer asap */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 655 | channel->onchannel_callback = NULL; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 656 | del_timer_sync(&channel->poll_timer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 657 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 658 | /* Send a closing message */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 659 | info = kmalloc(sizeof(*info) + |
| 660 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); |
Bill Pemberton | c3bf2e2 | 2010-05-05 15:27:34 -0400 | [diff] [blame] | 661 | /* FIXME: can't do anything other than return here because the |
| 662 | * function is void */ |
| 663 | if (!info) |
| 664 | return; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 665 | |
Greg Kroah-Hartman | bfc30aa | 2009-07-29 15:40:18 -0700 | [diff] [blame] | 666 | /* info->waitEvent = osd_WaitEventCreate(); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 667 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 668 | msg = (struct vmbus_channel_close_channel *)info->msg; |
| 669 | msg->header.msgtype = CHANNELMSG_CLOSECHANNEL; |
| 670 | msg->child_relid = channel->offermsg.child_relid; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 671 | |
Greg Kroah-Hartman | 8225021 | 2009-08-26 15:16:04 -0700 | [diff] [blame] | 672 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 673 | if (ret != 0) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 674 | /* TODO: */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 675 | /* something... */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 676 | } |
| 677 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 678 | /* Tear down the gpadl for the channel's ring buffer */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 679 | if (channel->ringbuffer_gpadlhandle) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 680 | vmbus_teardown_gpadl(channel, |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 681 | channel->ringbuffer_gpadlhandle); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 682 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 683 | /* TODO: Send a msg to release the childRelId */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 684 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 685 | /* Cleanup the ring buffers for this channel */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 686 | RingBufferCleanup(&channel->outbound); |
| 687 | RingBufferCleanup(&channel->inbound); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 688 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 689 | osd_PageFree(channel->ringbuffer_pages, channel->ringbuffer_pagecount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 690 | |
Greg Kroah-Hartman | 8c69f52 | 2009-07-15 12:48:29 -0700 | [diff] [blame] | 691 | kfree(info); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 692 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 693 | /* |
| 694 | * If we are closing the channel during an error path in |
| 695 | * opening the channel, don't free the channel since the |
| 696 | * caller will free the channel |
| 697 | */ |
| 698 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 699 | if (channel->state == CHANNEL_OPEN_STATE) { |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 700 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 701 | list_del(&channel->listentry); |
Greg Kroah-Hartman | 0f5e44c | 2009-07-15 14:57:16 -0700 | [diff] [blame] | 702 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 703 | |
Haiyang Zhang | e98cb27 | 2010-10-15 10:14:07 -0700 | [diff] [blame] | 704 | free_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 705 | } |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 706 | } |
Greg Kroah-Hartman | 70bfa30 | 2010-10-21 09:52:22 -0700 | [diff] [blame] | 707 | EXPORT_SYMBOL_GPL(vmbus_close); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 708 | |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 709 | /** |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 710 | * vmbus_sendpacket() - Send the specified buffer on the given channel |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 711 | * @channel: Pointer to vmbus_channel structure. |
| 712 | * @buffer: Pointer to the buffer you want to receive the data into. |
| 713 | * @bufferlen: Maximum size of what the the buffer will hold |
| 714 | * @requestid: Identifier of the request |
| 715 | * @type: Type of packet that is being send e.g. negotiate, time |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 716 | * packet etc. |
| 717 | * |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 718 | * Sends data in @buffer directly to hyper-v via the vmbus |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 719 | * This will send the data unparsed to hyper-v. |
| 720 | * |
| 721 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 722 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 723 | int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 724 | u32 bufferlen, u64 requestid, |
| 725 | enum vmbus_packet_type type, u32 flags) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 726 | { |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 727 | struct vmpacket_descriptor desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 728 | u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; |
| 729 | u32 packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); |
| 730 | struct scatterlist bufferlist[3]; |
| 731 | u64 aligned_data = 0; |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 732 | int ret; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 733 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 734 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 735 | channel, buffer, bufferlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 736 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 737 | dump_vmbus_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 738 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 739 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 740 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 741 | /* Setup the descriptor */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 742 | desc.Type = type; /* VmbusPacketTypeDataInBand; */ |
| 743 | desc.Flags = flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 744 | /* in 8-bytes granularity */ |
| 745 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 746 | desc.Length8 = (u16)(packetlen_aligned >> 3); |
| 747 | desc.TransactionId = requestid; |
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 | sg_init_table(bufferlist, 3); |
| 750 | sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); |
| 751 | sg_set_buf(&bufferlist[1], buffer, bufferlen); |
| 752 | sg_set_buf(&bufferlist[2], &aligned_data, |
| 753 | packetlen_aligned - packetlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 754 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 755 | ret = RingBufferWrite(&channel->outbound, bufferlist, 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 756 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 757 | /* TODO: We should determine if this is optional */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 758 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->outbound)) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 759 | vmbus_setevent(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 760 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 761 | return ret; |
| 762 | } |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 763 | EXPORT_SYMBOL(vmbus_sendpacket); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 764 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 765 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 766 | * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 767 | * packets using a GPADL Direct packet type. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 768 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 769 | int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 770 | struct hv_page_buffer pagebuffers[], |
| 771 | u32 pagecount, void *buffer, u32 bufferlen, |
| 772 | u64 requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 773 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 774 | int ret; |
| 775 | int i; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 776 | struct vmbus_channel_packet_page_buffer desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 777 | u32 descsize; |
| 778 | u32 packetlen; |
| 779 | u32 packetlen_aligned; |
| 780 | struct scatterlist bufferlist[3]; |
| 781 | u64 aligned_data = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 782 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 783 | if (pagecount > MAX_PAGE_BUFFER_COUNT) |
Bill Pemberton | 002b53e | 2010-05-05 15:27:39 -0400 | [diff] [blame] | 784 | return -EINVAL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 785 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 786 | dump_vmbus_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 787 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 788 | /* |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 789 | * 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] | 790 | * largest size we support |
| 791 | */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 792 | descsize = sizeof(struct vmbus_channel_packet_page_buffer) - |
| 793 | ((MAX_PAGE_BUFFER_COUNT - pagecount) * |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 794 | sizeof(struct hv_page_buffer)); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 795 | packetlen = descsize + bufferlen; |
| 796 | packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 797 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 798 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 799 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 800 | /* Setup the descriptor */ |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 801 | desc.type = VmbusPacketTypeDataUsingGpaDirect; |
| 802 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 803 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
| 804 | desc.length8 = (u16)(packetlen_aligned >> 3); |
| 805 | desc.transactionid = requestid; |
| 806 | desc.rangecount = pagecount; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 807 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 808 | for (i = 0; i < pagecount; i++) { |
| 809 | desc.range[i].Length = pagebuffers[i].Length; |
| 810 | desc.range[i].Offset = pagebuffers[i].Offset; |
| 811 | desc.range[i].Pfn = pagebuffers[i].Pfn; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 812 | } |
| 813 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 814 | sg_init_table(bufferlist, 3); |
| 815 | sg_set_buf(&bufferlist[0], &desc, descsize); |
| 816 | sg_set_buf(&bufferlist[1], buffer, bufferlen); |
| 817 | sg_set_buf(&bufferlist[2], &aligned_data, |
| 818 | packetlen_aligned - packetlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 819 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 820 | ret = RingBufferWrite(&channel->outbound, bufferlist, 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 821 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 822 | /* TODO: We should determine if this is optional */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 823 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->outbound)) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 824 | vmbus_setevent(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 825 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 826 | return ret; |
| 827 | } |
Greg Kroah-Hartman | 713efeb | 2010-10-21 09:29:54 -0700 | [diff] [blame] | 828 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 829 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 830 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 831 | * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 832 | * using a GPADL Direct packet type. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 833 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 834 | int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 835 | struct hv_multipage_buffer *multi_pagebuffer, |
| 836 | void *buffer, u32 bufferlen, u64 requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 837 | { |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 838 | int ret; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 839 | struct vmbus_channel_packet_multipage_buffer desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 840 | u32 descsize; |
| 841 | u32 packetlen; |
| 842 | u32 packetlen_aligned; |
| 843 | struct scatterlist bufferlist[3]; |
| 844 | u64 aligned_data = 0; |
| 845 | u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->Offset, |
| 846 | multi_pagebuffer->Length); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 847 | |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 848 | dump_vmbus_channel(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 849 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 850 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 851 | multi_pagebuffer->Offset, |
| 852 | multi_pagebuffer->Length, pfncount); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 853 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 854 | if ((pfncount < 0) || (pfncount > MAX_MULTIPAGE_BUFFER_COUNT)) |
Bill Pemberton | 002b53e | 2010-05-05 15:27:39 -0400 | [diff] [blame] | 855 | return -EINVAL; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 856 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 857 | /* |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 858 | * Adjust the size down since vmbus_channel_packet_multipage_buffer is |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 859 | * the largest size we support |
| 860 | */ |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 861 | descsize = sizeof(struct vmbus_channel_packet_multipage_buffer) - |
| 862 | ((MAX_MULTIPAGE_BUFFER_COUNT - pfncount) * |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 863 | sizeof(u64)); |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 864 | packetlen = descsize + bufferlen; |
| 865 | packetlen_aligned = ALIGN_UP(packetlen, sizeof(u64)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 866 | |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 867 | /* ASSERT((packetLenAligned - packetLen) < sizeof(u64)); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 868 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 869 | /* Setup the descriptor */ |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 870 | desc.type = VmbusPacketTypeDataUsingGpaDirect; |
| 871 | desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 872 | desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ |
| 873 | desc.length8 = (u16)(packetlen_aligned >> 3); |
| 874 | desc.transactionid = requestid; |
Haiyang Zhang | 430a8e9 | 2010-09-20 21:07:51 +0000 | [diff] [blame] | 875 | desc.rangecount = 1; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 876 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 877 | desc.range.Length = multi_pagebuffer->Length; |
| 878 | desc.range.Offset = multi_pagebuffer->Offset; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 879 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 880 | memcpy(desc.range.PfnArray, multi_pagebuffer->PfnArray, |
| 881 | pfncount * sizeof(u64)); |
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 | sg_init_table(bufferlist, 3); |
| 884 | sg_set_buf(&bufferlist[0], &desc, descsize); |
| 885 | sg_set_buf(&bufferlist[1], buffer, bufferlen); |
| 886 | sg_set_buf(&bufferlist[2], &aligned_data, |
| 887 | packetlen_aligned - packetlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 888 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 889 | ret = RingBufferWrite(&channel->outbound, bufferlist, 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 890 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 891 | /* TODO: We should determine if this is optional */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 892 | if (ret == 0 && !GetRingBufferInterruptMask(&channel->outbound)) |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 893 | vmbus_setevent(channel); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 894 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 895 | return ret; |
| 896 | } |
Greg Kroah-Hartman | 4cb106f | 2010-10-21 09:23:59 -0700 | [diff] [blame] | 897 | EXPORT_SYMBOL_GPL(vmbus_sendpacket_multipagebuffer); |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 898 | |
| 899 | /** |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 900 | * vmbus_recvpacket() - Retrieve the user packet on the specified channel |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 901 | * @channel: Pointer to vmbus_channel structure. |
| 902 | * @buffer: Pointer to the buffer you want to receive the data into. |
| 903 | * @bufferlen: Maximum size of what the the buffer will hold |
| 904 | * @buffer_actual_len: The actual size of the data after it was received |
| 905 | * @requestid: Identifier of the request |
Hank Janssen | c88c4e4 | 2010-05-04 15:55:05 -0700 | [diff] [blame] | 906 | * |
| 907 | * Receives directly from the hyper-v vmbus and puts the data it received |
| 908 | * into Buffer. This will receive the data unparsed from hyper-v. |
| 909 | * |
| 910 | * Mainly used by Hyper-V drivers. |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 911 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 912 | int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 913 | u32 bufferlen, u32 *buffer_actual_len, u64 *requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 914 | { |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 915 | struct vmpacket_descriptor desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 916 | u32 packetlen; |
| 917 | u32 userlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 918 | int ret; |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 919 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 920 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 921 | *buffer_actual_len = 0; |
| 922 | *requestid = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 923 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 924 | spin_lock_irqsave(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 925 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 926 | ret = RingBufferPeek(&channel->inbound, &desc, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 927 | sizeof(struct vmpacket_descriptor)); |
| 928 | if (ret != 0) { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 929 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 930 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 931 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 932 | return 0; |
| 933 | } |
| 934 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 935 | /* VmbusChannelClearEvent(Channel); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 936 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 937 | packetlen = desc.Length8 << 3; |
| 938 | userlen = packetlen - (desc.DataOffset8 << 3); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 939 | /* ASSERT(userLen > 0); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 940 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 941 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
| 942 | "flag %d tid %llx pktlen %d datalen %d> ", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 943 | channel, channel->offermsg.child_relid, desc.Type, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 944 | desc.Flags, desc.TransactionId, packetlen, userlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 945 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 946 | *buffer_actual_len = userlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 947 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 948 | if (userlen > bufferlen) { |
| 949 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 950 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 951 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 952 | bufferlen, userlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 953 | return -1; |
| 954 | } |
| 955 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 956 | *requestid = desc.TransactionId; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 957 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 958 | /* Copy over the packet to the user buffer */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 959 | ret = RingBufferRead(&channel->inbound, buffer, userlen, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 960 | (desc.DataOffset8 << 3)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 961 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 962 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 963 | |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 964 | return 0; |
| 965 | } |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 966 | EXPORT_SYMBOL(vmbus_recvpacket); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 967 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 968 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 969 | * vmbus_recvpacket_raw - Retrieve the raw packet on the specified channel |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 970 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 971 | int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 972 | u32 bufferlen, u32 *buffer_actual_len, |
| 973 | u64 *requestid) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 974 | { |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 975 | struct vmpacket_descriptor desc; |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 976 | u32 packetlen; |
| 977 | u32 userlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 978 | int ret; |
Greg Kroah-Hartman | 54411c4 | 2009-07-15 14:48:32 -0700 | [diff] [blame] | 979 | unsigned long flags; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 980 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 981 | *buffer_actual_len = 0; |
| 982 | *requestid = 0; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 983 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 984 | spin_lock_irqsave(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 985 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 986 | ret = RingBufferPeek(&channel->inbound, &desc, |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 987 | sizeof(struct vmpacket_descriptor)); |
| 988 | if (ret != 0) { |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 989 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 990 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 991 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 992 | return 0; |
| 993 | } |
| 994 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 995 | /* VmbusChannelClearEvent(Channel); */ |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 996 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 997 | packetlen = desc.Length8 << 3; |
| 998 | userlen = packetlen - (desc.DataOffset8 << 3); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 999 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 1000 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
| 1001 | "flag %d tid %llx pktlen %d datalen %d> ", |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 1002 | channel, channel->offermsg.child_relid, desc.Type, |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1003 | desc.Flags, desc.TransactionId, packetlen, userlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1004 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1005 | *buffer_actual_len = packetlen; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1006 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1007 | if (packetlen > bufferlen) { |
| 1008 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1009 | |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 1010 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1011 | "got space for only %d bytes", packetlen, bufferlen); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1012 | return -2; |
| 1013 | } |
| 1014 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1015 | *requestid = desc.TransactionId; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1016 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1017 | /* Copy over the entire packet to the user buffer */ |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 1018 | ret = RingBufferRead(&channel->inbound, buffer, packetlen, 0); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1019 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1020 | spin_unlock_irqrestore(&channel->inbound_lock, flags); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1021 | return 0; |
| 1022 | } |
Greg Kroah-Hartman | adaee6b | 2010-10-21 09:09:23 -0700 | [diff] [blame] | 1023 | EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1024 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 1025 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1026 | * vmbus_onchannel_event - Channel event callback |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 1027 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1028 | void vmbus_onchannel_event(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1029 | { |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1030 | dump_vmbus_channel(channel); |
Bill Pemberton | 0ace247 | 2010-05-05 15:27:40 -0400 | [diff] [blame] | 1031 | /* ASSERT(Channel->OnChannelCallback); */ |
Haiyang Zhang | 5996b3d | 2009-11-20 16:29:17 +0000 | [diff] [blame] | 1032 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 1033 | channel->onchannel_callback(channel->channel_callback_context); |
Haiyang Zhang | 5996b3d | 2009-11-20 16:29:17 +0000 | [diff] [blame] | 1034 | |
Haiyang Zhang | 39d70a4 | 2010-09-30 10:52:13 -0700 | [diff] [blame] | 1035 | mod_timer(&channel->poll_timer, jiffies + usecs_to_jiffies(100)); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1036 | } |
| 1037 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 1038 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1039 | * vmbus_ontimer - Timer event callback |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 1040 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1041 | void vmbus_ontimer(unsigned long data) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1042 | { |
Greg Kroah-Hartman | aded7165 | 2009-08-18 15:21:19 -0700 | [diff] [blame] | 1043 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1044 | |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 1045 | if (channel->onchannel_callback) |
| 1046 | channel->onchannel_callback(channel->channel_callback_context); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 1049 | /* |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1050 | * dump_vmbus_channel- Dump vmbus channel info to the console |
Greg Kroah-Hartman | f4266e3 | 2009-09-01 17:24:57 -0700 | [diff] [blame] | 1051 | */ |
Haiyang Zhang | fff41b2 | 2010-10-07 11:40:08 -0700 | [diff] [blame] | 1052 | static void dump_vmbus_channel(struct vmbus_channel *channel) |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1053 | { |
Haiyang Zhang | c50f7fb | 2010-11-08 14:04:38 -0800 | [diff] [blame] | 1054 | DPRINT_DBG(VMBUS, "Channel (%d)", channel->offermsg.child_relid); |
| 1055 | DumpRingInfo(&channel->outbound, "Outbound "); |
| 1056 | DumpRingInfo(&channel->inbound, "Inbound "); |
Hank Janssen | 3e7ee49 | 2009-07-13 16:02:34 -0700 | [diff] [blame] | 1057 | } |