Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1 | /* |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -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 |
Jeff Kirsher | adf8d3f | 2013-12-06 06:28:47 -0800 | [diff] [blame] | 14 | * this program; if not, see <http://www.gnu.org/licenses/>. |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 15 | * |
| 16 | * Authors: |
Haiyang Zhang | d0e94d1 | 2009-11-23 17:00:22 +0000 | [diff] [blame] | 17 | * Haiyang Zhang <haiyangz@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 18 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 19 | */ |
Hank Janssen | eb335bc | 2011-03-29 13:58:48 -0700 | [diff] [blame] | 20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 21 | |
Greg Kroah-Hartman | 5654e93 | 2009-07-14 15:08:20 -0700 | [diff] [blame] | 22 | #include <linux/kernel.h> |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 23 | #include <linux/sched.h> |
| 24 | #include <linux/wait.h> |
Greg Kroah-Hartman | 0ffa63b | 2009-07-15 11:06:01 -0700 | [diff] [blame] | 25 | #include <linux/mm.h> |
Greg Kroah-Hartman | b4362c9 | 2009-07-16 11:50:41 -0700 | [diff] [blame] | 26 | #include <linux/delay.h> |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 27 | #include <linux/io.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 29 | #include <linux/netdevice.h> |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 30 | #include <linux/if_ether.h> |
Stephen Rothwell | d647230 | 2015-06-02 19:01:38 +1000 | [diff] [blame] | 31 | #include <linux/vmalloc.h> |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 32 | #include <asm/sync_bitops.h> |
K. Y. Srinivasan | 3f335ea | 2011-05-12 19:34:15 -0700 | [diff] [blame] | 33 | |
K. Y. Srinivasan | 5ca7252 | 2011-05-12 19:34:37 -0700 | [diff] [blame] | 34 | #include "hyperv_net.h" |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 35 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 36 | /* |
| 37 | * Switch the data path from the synthetic interface to the VF |
| 38 | * interface. |
| 39 | */ |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 40 | void netvsc_switch_datapath(struct net_device *ndev, bool vf) |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 41 | { |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 42 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
| 43 | struct hv_device *dev = net_device_ctx->device_ctx; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 44 | struct netvsc_device *nv_dev = net_device_ctx->nvdev; |
| 45 | struct nvsp_message *init_pkt = &nv_dev->channel_init_pkt; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 46 | |
| 47 | memset(init_pkt, 0, sizeof(struct nvsp_message)); |
| 48 | init_pkt->hdr.msg_type = NVSP_MSG4_TYPE_SWITCH_DATA_PATH; |
| 49 | if (vf) |
| 50 | init_pkt->msg.v4_msg.active_dp.active_datapath = |
| 51 | NVSP_DATAPATH_VF; |
| 52 | else |
| 53 | init_pkt->msg.v4_msg.active_dp.active_datapath = |
| 54 | NVSP_DATAPATH_SYNTHETIC; |
| 55 | |
| 56 | vmbus_sendpacket(dev->channel, init_pkt, |
| 57 | sizeof(struct nvsp_message), |
| 58 | (unsigned long)init_pkt, |
| 59 | VM_PKT_DATA_INBAND, 0); |
| 60 | } |
| 61 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 62 | |
Vitaly Kuznetsov | 8809883 | 2016-05-13 13:55:25 +0200 | [diff] [blame] | 63 | static struct netvsc_device *alloc_net_device(void) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 64 | { |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 65 | struct netvsc_device *net_device; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 66 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 67 | net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
| 68 | if (!net_device) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 69 | return NULL; |
| 70 | |
Haiyang Zhang | f90251c | 2014-08-15 19:18:19 +0000 | [diff] [blame] | 71 | net_device->cb_buffer = kzalloc(NETVSC_PACKET_SIZE, GFP_KERNEL); |
| 72 | if (!net_device->cb_buffer) { |
| 73 | kfree(net_device); |
| 74 | return NULL; |
| 75 | } |
| 76 | |
Haiyang Zhang | dc5cd89 | 2012-06-04 06:42:38 +0000 | [diff] [blame] | 77 | init_waitqueue_head(&net_device->wait_drain); |
K. Y. Srinivasan | c38b9c7 | 2011-08-27 11:31:12 -0700 | [diff] [blame] | 78 | net_device->destroy = false; |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 79 | atomic_set(&net_device->open_cnt, 0); |
| 80 | atomic_set(&net_device->vf_use_cnt, 0); |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 81 | net_device->max_pkt = RNDIS_MAX_PKT_DEFAULT; |
| 82 | net_device->pkt_align = RNDIS_PKT_ALIGN_DEFAULT; |
| 83 | |
KY Srinivasan | 84bf9ce | 2016-04-14 16:31:54 -0700 | [diff] [blame] | 84 | net_device->vf_netdev = NULL; |
| 85 | net_device->vf_inject = false; |
| 86 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 87 | return net_device; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 88 | } |
| 89 | |
Haiyang Zhang | f90251c | 2014-08-15 19:18:19 +0000 | [diff] [blame] | 90 | static void free_netvsc_device(struct netvsc_device *nvdev) |
| 91 | { |
| 92 | kfree(nvdev->cb_buffer); |
| 93 | kfree(nvdev); |
| 94 | } |
| 95 | |
Haiyang Zhang | 5a71ae3 | 2010-12-10 12:03:55 -0800 | [diff] [blame] | 96 | static struct netvsc_device *get_outbound_net_device(struct hv_device *device) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 97 | { |
Vitaly Kuznetsov | 2625466 | 2016-06-03 17:50:59 +0200 | [diff] [blame] | 98 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 99 | |
K. Y. Srinivasan | 9d88f33 | 2011-08-27 11:31:16 -0700 | [diff] [blame] | 100 | if (net_device && net_device->destroy) |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 101 | net_device = NULL; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 102 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 103 | return net_device; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Haiyang Zhang | 5a71ae3 | 2010-12-10 12:03:55 -0800 | [diff] [blame] | 106 | static struct netvsc_device *get_inbound_net_device(struct hv_device *device) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 107 | { |
Vitaly Kuznetsov | 2625466 | 2016-06-03 17:50:59 +0200 | [diff] [blame] | 108 | struct netvsc_device *net_device = hv_device_to_netvsc_device(device); |
K. Y. Srinivasan | 9d88f33 | 2011-08-27 11:31:16 -0700 | [diff] [blame] | 109 | |
| 110 | if (!net_device) |
| 111 | goto get_in_err; |
| 112 | |
| 113 | if (net_device->destroy && |
| 114 | atomic_read(&net_device->num_outstanding_sends) == 0) |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 115 | net_device = NULL; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 116 | |
K. Y. Srinivasan | 9d88f33 | 2011-08-27 11:31:16 -0700 | [diff] [blame] | 117 | get_in_err: |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 118 | return net_device; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 119 | } |
| 120 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 121 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 122 | static int netvsc_destroy_buf(struct hv_device *device) |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 123 | { |
| 124 | struct nvsp_message *revoke_packet; |
| 125 | int ret = 0; |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 126 | struct net_device *ndev = hv_get_drvdata(device); |
Vitaly Kuznetsov | 2625466 | 2016-06-03 17:50:59 +0200 | [diff] [blame] | 127 | struct netvsc_device *net_device = net_device_to_netvsc_device(ndev); |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 128 | |
| 129 | /* |
| 130 | * If we got a section count, it means we received a |
| 131 | * SendReceiveBufferComplete msg (ie sent |
| 132 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need |
| 133 | * to send a revoke msg here |
| 134 | */ |
| 135 | if (net_device->recv_section_cnt) { |
| 136 | /* Send the revoke receive buffer */ |
| 137 | revoke_packet = &net_device->revoke_packet; |
| 138 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); |
| 139 | |
| 140 | revoke_packet->hdr.msg_type = |
| 141 | NVSP_MSG1_TYPE_REVOKE_RECV_BUF; |
| 142 | revoke_packet->msg.v1_msg. |
| 143 | revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; |
| 144 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 145 | ret = vmbus_sendpacket(device->channel, |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 146 | revoke_packet, |
| 147 | sizeof(struct nvsp_message), |
| 148 | (unsigned long)revoke_packet, |
| 149 | VM_PKT_DATA_INBAND, 0); |
| 150 | /* |
| 151 | * If we failed here, we might as well return and |
| 152 | * have a leak rather than continue and a bugchk |
| 153 | */ |
| 154 | if (ret != 0) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 155 | netdev_err(ndev, "unable to send " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 156 | "revoke receive buffer to netvsp\n"); |
K. Y. Srinivasan | a3e0053 | 2011-08-25 09:49:12 -0700 | [diff] [blame] | 157 | return ret; |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
| 161 | /* Teardown the gpadl on the vsp end */ |
| 162 | if (net_device->recv_buf_gpadl_handle) { |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 163 | ret = vmbus_teardown_gpadl(device->channel, |
| 164 | net_device->recv_buf_gpadl_handle); |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 165 | |
| 166 | /* If we failed here, we might as well return and have a leak |
| 167 | * rather than continue and a bugchk |
| 168 | */ |
| 169 | if (ret != 0) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 170 | netdev_err(ndev, |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 171 | "unable to teardown receive buffer's gpadl\n"); |
Dan Carpenter | 7f9615e | 2011-08-27 14:06:07 +0300 | [diff] [blame] | 172 | return ret; |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 173 | } |
| 174 | net_device->recv_buf_gpadl_handle = 0; |
| 175 | } |
| 176 | |
| 177 | if (net_device->recv_buf) { |
| 178 | /* Free up the receive buffer */ |
Haiyang Zhang | b679ef7 | 2014-01-27 15:03:42 -0800 | [diff] [blame] | 179 | vfree(net_device->recv_buf); |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 180 | net_device->recv_buf = NULL; |
| 181 | } |
| 182 | |
| 183 | if (net_device->recv_section) { |
| 184 | net_device->recv_section_cnt = 0; |
| 185 | kfree(net_device->recv_section); |
| 186 | net_device->recv_section = NULL; |
| 187 | } |
| 188 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 189 | /* Deal with the send buffer we may have setup. |
| 190 | * If we got a send section size, it means we received a |
Haiyang Zhang | c51ed1825 | 2014-12-19 18:25:18 -0800 | [diff] [blame] | 191 | * NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE msg (ie sent |
| 192 | * NVSP_MSG1_TYPE_SEND_SEND_BUF msg) therefore, we need |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 193 | * to send a revoke msg here |
| 194 | */ |
| 195 | if (net_device->send_section_size) { |
| 196 | /* Send the revoke receive buffer */ |
| 197 | revoke_packet = &net_device->revoke_packet; |
| 198 | memset(revoke_packet, 0, sizeof(struct nvsp_message)); |
| 199 | |
| 200 | revoke_packet->hdr.msg_type = |
| 201 | NVSP_MSG1_TYPE_REVOKE_SEND_BUF; |
Haiyang Zhang | c51ed1825 | 2014-12-19 18:25:18 -0800 | [diff] [blame] | 202 | revoke_packet->msg.v1_msg.revoke_send_buf.id = |
| 203 | NETVSC_SEND_BUFFER_ID; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 204 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 205 | ret = vmbus_sendpacket(device->channel, |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 206 | revoke_packet, |
| 207 | sizeof(struct nvsp_message), |
| 208 | (unsigned long)revoke_packet, |
| 209 | VM_PKT_DATA_INBAND, 0); |
| 210 | /* If we failed here, we might as well return and |
| 211 | * have a leak rather than continue and a bugchk |
| 212 | */ |
| 213 | if (ret != 0) { |
| 214 | netdev_err(ndev, "unable to send " |
| 215 | "revoke send buffer to netvsp\n"); |
| 216 | return ret; |
| 217 | } |
| 218 | } |
| 219 | /* Teardown the gpadl on the vsp end */ |
| 220 | if (net_device->send_buf_gpadl_handle) { |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 221 | ret = vmbus_teardown_gpadl(device->channel, |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 222 | net_device->send_buf_gpadl_handle); |
| 223 | |
| 224 | /* If we failed here, we might as well return and have a leak |
| 225 | * rather than continue and a bugchk |
| 226 | */ |
| 227 | if (ret != 0) { |
| 228 | netdev_err(ndev, |
| 229 | "unable to teardown send buffer's gpadl\n"); |
| 230 | return ret; |
| 231 | } |
Dave Jones | 2f18423 | 2014-06-16 16:59:02 -0400 | [diff] [blame] | 232 | net_device->send_buf_gpadl_handle = 0; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 233 | } |
| 234 | if (net_device->send_buf) { |
Haiyang Zhang | c51ed1825 | 2014-12-19 18:25:18 -0800 | [diff] [blame] | 235 | /* Free up the send buffer */ |
KY Srinivasan | 06b47aa | 2014-08-02 10:42:02 -0700 | [diff] [blame] | 236 | vfree(net_device->send_buf); |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 237 | net_device->send_buf = NULL; |
| 238 | } |
| 239 | kfree(net_device->send_section_map); |
| 240 | |
Haiyang Zhang | ec91cd0 | 2011-04-21 12:30:43 -0700 | [diff] [blame] | 241 | return ret; |
| 242 | } |
| 243 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 244 | static int netvsc_init_buf(struct hv_device *device) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 245 | { |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 246 | int ret = 0; |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 247 | struct netvsc_device *net_device; |
| 248 | struct nvsp_message *init_packet; |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 249 | struct net_device *ndev; |
K. Y. Srinivasan | 0a726c2 | 2015-05-28 17:08:06 -0700 | [diff] [blame] | 250 | int node; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 251 | |
Haiyang Zhang | 5a71ae3 | 2010-12-10 12:03:55 -0800 | [diff] [blame] | 252 | net_device = get_outbound_net_device(device); |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 253 | if (!net_device) |
K. Y. Srinivasan | 927bc33 | 2011-08-25 09:49:13 -0700 | [diff] [blame] | 254 | return -ENODEV; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 255 | ndev = hv_get_drvdata(device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 256 | |
K. Y. Srinivasan | 0a726c2 | 2015-05-28 17:08:06 -0700 | [diff] [blame] | 257 | node = cpu_to_node(device->channel->target_cpu); |
| 258 | net_device->recv_buf = vzalloc_node(net_device->recv_buf_size, node); |
| 259 | if (!net_device->recv_buf) |
| 260 | net_device->recv_buf = vzalloc(net_device->recv_buf_size); |
| 261 | |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 262 | if (!net_device->recv_buf) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 263 | netdev_err(ndev, "unable to allocate receive " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 264 | "buffer of size %d\n", net_device->recv_buf_size); |
K. Y. Srinivasan | 927bc33 | 2011-08-25 09:49:13 -0700 | [diff] [blame] | 265 | ret = -ENOMEM; |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 266 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 267 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 268 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 269 | /* |
| 270 | * Establish the gpadl handle for this buffer on this |
| 271 | * channel. Note: This call uses the vmbus connection rather |
| 272 | * than the channel to establish the gpadl handle. |
| 273 | */ |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 274 | ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf, |
| 275 | net_device->recv_buf_size, |
| 276 | &net_device->recv_buf_gpadl_handle); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 277 | if (ret != 0) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 278 | netdev_err(ndev, |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 279 | "unable to establish receive buffer's gpadl\n"); |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 280 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 283 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 284 | /* Notify the NetVsp of the gpadl handle */ |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 285 | init_packet = &net_device->channel_init_pkt; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 286 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 287 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 288 | |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 289 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; |
| 290 | init_packet->msg.v1_msg.send_recv_buf. |
| 291 | gpadl_handle = net_device->recv_buf_gpadl_handle; |
| 292 | init_packet->msg.v1_msg. |
| 293 | send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 294 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 295 | /* Send the gpadl notification request */ |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 296 | ret = vmbus_sendpacket(device->channel, init_packet, |
Greg Kroah-Hartman | 5a4df29 | 2010-10-21 09:43:24 -0700 | [diff] [blame] | 297 | sizeof(struct nvsp_message), |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 298 | (unsigned long)init_packet, |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 299 | VM_PKT_DATA_INBAND, |
Greg Kroah-Hartman | 5a4df29 | 2010-10-21 09:43:24 -0700 | [diff] [blame] | 300 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 301 | if (ret != 0) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 302 | netdev_err(ndev, |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 303 | "unable to send receive buffer's gpadl to netvsp\n"); |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 304 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 305 | } |
| 306 | |
Vitaly Kuznetsov | 5362855 | 2016-06-09 12:44:03 +0200 | [diff] [blame] | 307 | wait_for_completion(&net_device->channel_init_wait); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 308 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 309 | /* Check the response */ |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 310 | if (init_packet->msg.v1_msg. |
| 311 | send_recv_buf_complete.status != NVSP_STAT_SUCCESS) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 312 | netdev_err(ndev, "Unable to complete receive buffer " |
Haiyang Zhang | 8bff33a | 2011-09-01 12:19:48 -0700 | [diff] [blame] | 313 | "initialization with NetVsp - status %d\n", |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 314 | init_packet->msg.v1_msg. |
| 315 | send_recv_buf_complete.status); |
K. Y. Srinivasan | 927bc33 | 2011-08-25 09:49:13 -0700 | [diff] [blame] | 316 | ret = -EINVAL; |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 317 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 318 | } |
| 319 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 320 | /* Parse the response */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 321 | |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 322 | net_device->recv_section_cnt = init_packet->msg. |
| 323 | v1_msg.send_recv_buf_complete.num_sections; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 324 | |
Haiyang Zhang | c181320 | 2011-11-30 07:19:07 -0800 | [diff] [blame] | 325 | net_device->recv_section = kmemdup( |
| 326 | init_packet->msg.v1_msg.send_recv_buf_complete.sections, |
| 327 | net_device->recv_section_cnt * |
| 328 | sizeof(struct nvsp_1_receive_buffer_section), |
| 329 | GFP_KERNEL); |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 330 | if (net_device->recv_section == NULL) { |
K. Y. Srinivasan | 927bc33 | 2011-08-25 09:49:13 -0700 | [diff] [blame] | 331 | ret = -EINVAL; |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 332 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 335 | /* |
| 336 | * For 1st release, there should only be 1 section that represents the |
| 337 | * entire receive buffer |
| 338 | */ |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 339 | if (net_device->recv_section_cnt != 1 || |
| 340 | net_device->recv_section->offset != 0) { |
K. Y. Srinivasan | 927bc33 | 2011-08-25 09:49:13 -0700 | [diff] [blame] | 341 | ret = -EINVAL; |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 342 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 343 | } |
| 344 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 345 | /* Now setup the send buffer. |
| 346 | */ |
K. Y. Srinivasan | 5defde5 | 2015-05-28 17:08:07 -0700 | [diff] [blame] | 347 | net_device->send_buf = vzalloc_node(net_device->send_buf_size, node); |
| 348 | if (!net_device->send_buf) |
| 349 | net_device->send_buf = vzalloc(net_device->send_buf_size); |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 350 | if (!net_device->send_buf) { |
| 351 | netdev_err(ndev, "unable to allocate send " |
| 352 | "buffer of size %d\n", net_device->send_buf_size); |
| 353 | ret = -ENOMEM; |
| 354 | goto cleanup; |
| 355 | } |
| 356 | |
| 357 | /* Establish the gpadl handle for this buffer on this |
| 358 | * channel. Note: This call uses the vmbus connection rather |
| 359 | * than the channel to establish the gpadl handle. |
| 360 | */ |
| 361 | ret = vmbus_establish_gpadl(device->channel, net_device->send_buf, |
| 362 | net_device->send_buf_size, |
| 363 | &net_device->send_buf_gpadl_handle); |
| 364 | if (ret != 0) { |
| 365 | netdev_err(ndev, |
| 366 | "unable to establish send buffer's gpadl\n"); |
| 367 | goto cleanup; |
| 368 | } |
| 369 | |
| 370 | /* Notify the NetVsp of the gpadl handle */ |
| 371 | init_packet = &net_device->channel_init_pkt; |
| 372 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
| 373 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; |
Haiyang Zhang | c51ed1825 | 2014-12-19 18:25:18 -0800 | [diff] [blame] | 374 | init_packet->msg.v1_msg.send_send_buf.gpadl_handle = |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 375 | net_device->send_buf_gpadl_handle; |
Haiyang Zhang | c51ed1825 | 2014-12-19 18:25:18 -0800 | [diff] [blame] | 376 | init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 377 | |
| 378 | /* Send the gpadl notification request */ |
| 379 | ret = vmbus_sendpacket(device->channel, init_packet, |
| 380 | sizeof(struct nvsp_message), |
| 381 | (unsigned long)init_packet, |
| 382 | VM_PKT_DATA_INBAND, |
| 383 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
| 384 | if (ret != 0) { |
| 385 | netdev_err(ndev, |
| 386 | "unable to send send buffer's gpadl to netvsp\n"); |
| 387 | goto cleanup; |
| 388 | } |
| 389 | |
Vitaly Kuznetsov | 5362855 | 2016-06-09 12:44:03 +0200 | [diff] [blame] | 390 | wait_for_completion(&net_device->channel_init_wait); |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 391 | |
| 392 | /* Check the response */ |
| 393 | if (init_packet->msg.v1_msg. |
| 394 | send_send_buf_complete.status != NVSP_STAT_SUCCESS) { |
| 395 | netdev_err(ndev, "Unable to complete send buffer " |
| 396 | "initialization with NetVsp - status %d\n", |
| 397 | init_packet->msg.v1_msg. |
Haiyang Zhang | c51ed1825 | 2014-12-19 18:25:18 -0800 | [diff] [blame] | 398 | send_send_buf_complete.status); |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 399 | ret = -EINVAL; |
| 400 | goto cleanup; |
| 401 | } |
| 402 | |
| 403 | /* Parse the response */ |
| 404 | net_device->send_section_size = init_packet->msg. |
| 405 | v1_msg.send_send_buf_complete.section_size; |
| 406 | |
| 407 | /* Section count is simply the size divided by the section size. |
| 408 | */ |
| 409 | net_device->send_section_cnt = |
| 410 | net_device->send_buf_size/net_device->send_section_size; |
| 411 | |
| 412 | dev_info(&device->device, "Send section size: %d, Section count:%d\n", |
| 413 | net_device->send_section_size, net_device->send_section_cnt); |
| 414 | |
| 415 | /* Setup state for managing the send buffer. */ |
| 416 | net_device->map_words = DIV_ROUND_UP(net_device->send_section_cnt, |
| 417 | BITS_PER_LONG); |
| 418 | |
| 419 | net_device->send_section_map = |
| 420 | kzalloc(net_device->map_words * sizeof(ulong), GFP_KERNEL); |
Wei Yongjun | dd1d3f8 | 2014-07-23 09:00:35 +0800 | [diff] [blame] | 421 | if (net_device->send_section_map == NULL) { |
| 422 | ret = -ENOMEM; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 423 | goto cleanup; |
Wei Yongjun | dd1d3f8 | 2014-07-23 09:00:35 +0800 | [diff] [blame] | 424 | } |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 425 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 426 | goto exit; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 427 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 428 | cleanup: |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 429 | netvsc_destroy_buf(device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 430 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 431 | exit: |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 432 | return ret; |
| 433 | } |
| 434 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 435 | |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 436 | /* Negotiate NVSP protocol version */ |
| 437 | static int negotiate_nvsp_ver(struct hv_device *device, |
| 438 | struct netvsc_device *net_device, |
| 439 | struct nvsp_message *init_packet, |
| 440 | u32 nvsp_ver) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 441 | { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 442 | struct net_device *ndev = hv_get_drvdata(device); |
Nicholas Mc Guire | 7390fe9 | 2015-01-25 15:46:31 +0100 | [diff] [blame] | 443 | int ret; |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 444 | |
| 445 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
| 446 | init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT; |
| 447 | init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver; |
| 448 | init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver; |
| 449 | |
| 450 | /* Send the init request */ |
| 451 | ret = vmbus_sendpacket(device->channel, init_packet, |
| 452 | sizeof(struct nvsp_message), |
| 453 | (unsigned long)init_packet, |
| 454 | VM_PKT_DATA_INBAND, |
| 455 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); |
| 456 | |
| 457 | if (ret != 0) |
| 458 | return ret; |
| 459 | |
Vitaly Kuznetsov | 5362855 | 2016-06-09 12:44:03 +0200 | [diff] [blame] | 460 | wait_for_completion(&net_device->channel_init_wait); |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 461 | |
| 462 | if (init_packet->msg.init_msg.init_complete.status != |
| 463 | NVSP_STAT_SUCCESS) |
| 464 | return -EINVAL; |
| 465 | |
Haiyang Zhang | a1eabb0 | 2014-02-19 15:49:45 -0800 | [diff] [blame] | 466 | if (nvsp_ver == NVSP_PROTOCOL_VERSION_1) |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 467 | return 0; |
| 468 | |
Haiyang Zhang | 71790a2 | 2015-07-24 10:08:40 -0700 | [diff] [blame] | 469 | /* NVSPv2 or later: Send NDIS config */ |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 470 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
| 471 | init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 472 | init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN; |
Haiyang Zhang | 1f5f3a7 | 2012-03-12 10:20:50 +0000 | [diff] [blame] | 473 | init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 474 | |
Haiyang Zhang | 71790a2 | 2015-07-24 10:08:40 -0700 | [diff] [blame] | 475 | if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) |
| 476 | init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1; |
| 477 | |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 478 | ret = vmbus_sendpacket(device->channel, init_packet, |
| 479 | sizeof(struct nvsp_message), |
| 480 | (unsigned long)init_packet, |
| 481 | VM_PKT_DATA_INBAND, 0); |
| 482 | |
| 483 | return ret; |
| 484 | } |
| 485 | |
| 486 | static int netvsc_connect_vsp(struct hv_device *device) |
| 487 | { |
| 488 | int ret; |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 489 | struct netvsc_device *net_device; |
| 490 | struct nvsp_message *init_packet; |
| 491 | int ndis_version; |
Haiyang Zhang | a1eabb0 | 2014-02-19 15:49:45 -0800 | [diff] [blame] | 492 | u32 ver_list[] = { NVSP_PROTOCOL_VERSION_1, NVSP_PROTOCOL_VERSION_2, |
| 493 | NVSP_PROTOCOL_VERSION_4, NVSP_PROTOCOL_VERSION_5 }; |
| 494 | int i, num_ver = 4; /* number of different NVSP versions */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 495 | |
Haiyang Zhang | 5a71ae3 | 2010-12-10 12:03:55 -0800 | [diff] [blame] | 496 | net_device = get_outbound_net_device(device); |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 497 | if (!net_device) |
K. Y. Srinivasan | 0f48c72 | 2011-08-25 09:49:14 -0700 | [diff] [blame] | 498 | return -ENODEV; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 499 | |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 500 | init_packet = &net_device->channel_init_pkt; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 501 | |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 502 | /* Negotiate the latest NVSP protocol supported */ |
Haiyang Zhang | a1eabb0 | 2014-02-19 15:49:45 -0800 | [diff] [blame] | 503 | for (i = num_ver - 1; i >= 0; i--) |
| 504 | if (negotiate_nvsp_ver(device, net_device, init_packet, |
| 505 | ver_list[i]) == 0) { |
| 506 | net_device->nvsp_version = ver_list[i]; |
| 507 | break; |
| 508 | } |
| 509 | |
| 510 | if (i < 0) { |
K. Y. Srinivasan | 0f48c72 | 2011-08-25 09:49:14 -0700 | [diff] [blame] | 511 | ret = -EPROTO; |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 512 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 513 | } |
Haiyang Zhang | f157e78 | 2011-12-15 13:45:16 -0800 | [diff] [blame] | 514 | |
| 515 | pr_debug("Negotiated NVSP version:%x\n", net_device->nvsp_version); |
| 516 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 517 | /* Send the ndis version */ |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 518 | memset(init_packet, 0, sizeof(struct nvsp_message)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 519 | |
Haiyang Zhang | a1eabb0 | 2014-02-19 15:49:45 -0800 | [diff] [blame] | 520 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_4) |
KY Srinivasan | 1f73db4 | 2014-04-09 15:00:46 -0700 | [diff] [blame] | 521 | ndis_version = 0x00060001; |
Haiyang Zhang | a1eabb0 | 2014-02-19 15:49:45 -0800 | [diff] [blame] | 522 | else |
| 523 | ndis_version = 0x0006001e; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 524 | |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 525 | init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; |
| 526 | init_packet->msg.v1_msg. |
| 527 | send_ndis_ver.ndis_major_ver = |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 528 | (ndis_version & 0xFFFF0000) >> 16; |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 529 | init_packet->msg.v1_msg. |
| 530 | send_ndis_ver.ndis_minor_ver = |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 531 | ndis_version & 0xFFFF; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 532 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 533 | /* Send the init request */ |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 534 | ret = vmbus_sendpacket(device->channel, init_packet, |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 535 | sizeof(struct nvsp_message), |
| 536 | (unsigned long)init_packet, |
| 537 | VM_PKT_DATA_INBAND, 0); |
K. Y. Srinivasan | 0f48c72 | 2011-08-25 09:49:14 -0700 | [diff] [blame] | 538 | if (ret != 0) |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 539 | goto cleanup; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 540 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 541 | /* Post the big receive buffer to NetVSP */ |
Haiyang Zhang | 99d3016 | 2014-03-09 16:10:59 -0700 | [diff] [blame] | 542 | if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
| 543 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; |
| 544 | else |
| 545 | net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 546 | net_device->send_buf_size = NETVSC_SEND_BUFFER_SIZE; |
Haiyang Zhang | 99d3016 | 2014-03-09 16:10:59 -0700 | [diff] [blame] | 547 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 548 | ret = netvsc_init_buf(device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 549 | |
K. Y. Srinivasan | 0c3b7b2 | 2011-02-11 09:59:43 -0800 | [diff] [blame] | 550 | cleanup: |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 551 | return ret; |
| 552 | } |
| 553 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 554 | static void netvsc_disconnect_vsp(struct hv_device *device) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 555 | { |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 556 | netvsc_destroy_buf(device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 557 | } |
| 558 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 559 | /* |
Haiyang Zhang | 5a71ae3 | 2010-12-10 12:03:55 -0800 | [diff] [blame] | 560 | * netvsc_device_remove - Callback when the root bus device is removed |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 561 | */ |
K. Y. Srinivasan | 905620d | 2011-05-10 07:54:54 -0700 | [diff] [blame] | 562 | int netvsc_device_remove(struct hv_device *device) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 563 | { |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 564 | struct net_device *ndev = hv_get_drvdata(device); |
| 565 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
| 566 | struct netvsc_device *net_device = net_device_ctx->nvdev; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 567 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 568 | netvsc_disconnect_vsp(device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 569 | |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 570 | net_device_ctx->nvdev = NULL; |
K. Y. Srinivasan | 3852409 | 2011-08-27 11:31:14 -0700 | [diff] [blame] | 571 | |
K. Y. Srinivasan | 86c921a | 2011-09-13 10:59:54 -0700 | [diff] [blame] | 572 | /* |
| 573 | * At this point, no one should be accessing net_device |
| 574 | * except in here |
| 575 | */ |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 576 | dev_notice(&device->device, "net device safe to remove\n"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 577 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 578 | /* Now, we can close the channel safely */ |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 579 | vmbus_close(device->channel); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 580 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 581 | /* Release all resources */ |
Markus Elfring | aa99c47 | 2014-11-25 22:33:45 +0100 | [diff] [blame] | 582 | vfree(net_device->sub_cb_buf); |
Haiyang Zhang | f90251c | 2014-08-15 19:18:19 +0000 | [diff] [blame] | 583 | free_netvsc_device(net_device); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 584 | return 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 585 | } |
| 586 | |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 587 | |
| 588 | #define RING_AVAIL_PERCENT_HIWATER 20 |
| 589 | #define RING_AVAIL_PERCENT_LOWATER 10 |
| 590 | |
| 591 | /* |
| 592 | * Get the percentage of available bytes to write in the ring. |
| 593 | * The return value is in range from 0 to 100. |
| 594 | */ |
| 595 | static inline u32 hv_ringbuf_avail_percent( |
| 596 | struct hv_ring_buffer_info *ring_info) |
| 597 | { |
| 598 | u32 avail_read, avail_write; |
| 599 | |
| 600 | hv_get_ringbuffer_availbytes(ring_info, &avail_read, &avail_write); |
| 601 | |
| 602 | return avail_write * 100 / ring_info->ring_datasize; |
| 603 | } |
| 604 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 605 | static inline void netvsc_free_send_slot(struct netvsc_device *net_device, |
| 606 | u32 index) |
| 607 | { |
| 608 | sync_change_bit(index, net_device->send_section_map); |
| 609 | } |
| 610 | |
KY Srinivasan | 97c1723 | 2014-02-16 16:38:44 -0800 | [diff] [blame] | 611 | static void netvsc_send_completion(struct netvsc_device *net_device, |
KY Srinivasan | 25b85ee | 2015-12-01 16:43:05 -0800 | [diff] [blame] | 612 | struct vmbus_channel *incoming_channel, |
KY Srinivasan | 97c1723 | 2014-02-16 16:38:44 -0800 | [diff] [blame] | 613 | struct hv_device *device, |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 614 | struct vmpacket_descriptor *packet) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 615 | { |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 616 | struct nvsp_message *nvsp_packet; |
| 617 | struct hv_netvsc_packet *nvsc_packet; |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 618 | struct net_device *ndev = hv_get_drvdata(device); |
| 619 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 620 | u32 send_index; |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 621 | struct sk_buff *skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 622 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 623 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 624 | (packet->offset8 << 3)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 625 | |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 626 | if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) || |
| 627 | (nvsp_packet->hdr.msg_type == |
| 628 | NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) || |
| 629 | (nvsp_packet->hdr.msg_type == |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 630 | NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE) || |
| 631 | (nvsp_packet->hdr.msg_type == |
| 632 | NVSP_MSG5_TYPE_SUBCHANNEL)) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 633 | /* Copy the response back */ |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 634 | memcpy(&net_device->channel_init_pkt, nvsp_packet, |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 635 | sizeof(struct nvsp_message)); |
K. Y. Srinivasan | 35abb21 | 2011-05-10 07:55:41 -0700 | [diff] [blame] | 636 | complete(&net_device->channel_init_wait); |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 637 | } else if (nvsp_packet->hdr.msg_type == |
| 638 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) { |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 639 | int num_outstanding_sends; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 640 | u16 q_idx = 0; |
| 641 | struct vmbus_channel *channel = device->channel; |
| 642 | int queue_sends; |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 643 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 644 | /* Get the send context */ |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 645 | skb = (struct sk_buff *)(unsigned long)packet->trans_id; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 646 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 647 | /* Notify the layer above us */ |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 648 | if (skb) { |
| 649 | nvsc_packet = (struct hv_netvsc_packet *) skb->cb; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 650 | send_index = nvsc_packet->send_buf_index; |
| 651 | if (send_index != NETVSC_INVALID_INDEX) |
| 652 | netvsc_free_send_slot(net_device, send_index); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 653 | q_idx = nvsc_packet->q_idx; |
KY Srinivasan | 25b85ee | 2015-12-01 16:43:05 -0800 | [diff] [blame] | 654 | channel = incoming_channel; |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 655 | dev_kfree_skb_any(skb); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 656 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 657 | |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 658 | num_outstanding_sends = |
| 659 | atomic_dec_return(&net_device->num_outstanding_sends); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 660 | queue_sends = atomic_dec_return(&net_device-> |
| 661 | queue_sends[q_idx]); |
Haiyang Zhang | 1d06825 | 2011-12-02 11:56:25 -0800 | [diff] [blame] | 662 | |
Haiyang Zhang | dc5cd89 | 2012-06-04 06:42:38 +0000 | [diff] [blame] | 663 | if (net_device->destroy && num_outstanding_sends == 0) |
| 664 | wake_up(&net_device->wait_drain); |
| 665 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 666 | if (netif_tx_queue_stopped(netdev_get_tx_queue(ndev, q_idx)) && |
Vitaly Kuznetsov | 3d541ac | 2016-05-13 13:55:22 +0200 | [diff] [blame] | 667 | !net_device_ctx->start_remove && |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 668 | (hv_ringbuf_avail_percent(&channel->outbound) > |
| 669 | RING_AVAIL_PERCENT_HIWATER || queue_sends < 1)) |
| 670 | netif_tx_wake_queue(netdev_get_tx_queue( |
| 671 | ndev, q_idx)); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 672 | } else { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 673 | netdev_err(ndev, "Unknown send completion packet type- " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 674 | "%d received!!\n", nvsp_packet->hdr.msg_type); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 675 | } |
| 676 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 677 | } |
| 678 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 679 | static u32 netvsc_get_next_send_section(struct netvsc_device *net_device) |
| 680 | { |
| 681 | unsigned long index; |
| 682 | u32 max_words = net_device->map_words; |
| 683 | unsigned long *map_addr = (unsigned long *)net_device->send_section_map; |
| 684 | u32 section_cnt = net_device->send_section_cnt; |
| 685 | int ret_val = NETVSC_INVALID_INDEX; |
| 686 | int i; |
| 687 | int prev_val; |
| 688 | |
| 689 | for (i = 0; i < max_words; i++) { |
| 690 | if (!~(map_addr[i])) |
| 691 | continue; |
| 692 | index = ffz(map_addr[i]); |
| 693 | prev_val = sync_test_and_set_bit(index, &map_addr[i]); |
| 694 | if (prev_val) |
| 695 | continue; |
| 696 | if ((index + (i * BITS_PER_LONG)) >= section_cnt) |
| 697 | break; |
| 698 | ret_val = (index + (i * BITS_PER_LONG)); |
| 699 | break; |
| 700 | } |
| 701 | return ret_val; |
| 702 | } |
| 703 | |
Lad, Prabhakar | da19fcd | 2015-02-05 15:06:33 +0000 | [diff] [blame] | 704 | static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device, |
| 705 | unsigned int section_index, |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 706 | u32 pend_size, |
KY Srinivasan | 2447676 | 2015-12-01 16:43:06 -0800 | [diff] [blame] | 707 | struct hv_netvsc_packet *packet, |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 708 | struct rndis_message *rndis_msg, |
KY Srinivasan | 694a9fb | 2015-12-01 16:43:15 -0800 | [diff] [blame] | 709 | struct hv_page_buffer **pb, |
| 710 | struct sk_buff *skb) |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 711 | { |
| 712 | char *start = net_device->send_buf; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 713 | char *dest = start + (section_index * net_device->send_section_size) |
| 714 | + pend_size; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 715 | int i; |
KY Srinivasan | 694a9fb | 2015-12-01 16:43:15 -0800 | [diff] [blame] | 716 | bool is_data_pkt = (skb != NULL) ? true : false; |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 717 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 718 | u32 msg_size = 0; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 719 | u32 padding = 0; |
| 720 | u32 remain = packet->total_data_buflen % net_device->pkt_align; |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 721 | u32 page_count = packet->cp_partial ? packet->rmsg_pgcnt : |
| 722 | packet->page_buf_cnt; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 723 | |
| 724 | /* Add padding */ |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 725 | if (is_data_pkt && xmit_more && remain && |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 726 | !packet->cp_partial) { |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 727 | padding = net_device->pkt_align - remain; |
KY Srinivasan | 2447676 | 2015-12-01 16:43:06 -0800 | [diff] [blame] | 728 | rndis_msg->msg_len += padding; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 729 | packet->total_data_buflen += padding; |
| 730 | } |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 731 | |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 732 | for (i = 0; i < page_count; i++) { |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 733 | char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT); |
| 734 | u32 offset = (*pb)[i].offset; |
| 735 | u32 len = (*pb)[i].len; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 736 | |
| 737 | memcpy(dest, (src + offset), len); |
| 738 | msg_size += len; |
| 739 | dest += len; |
| 740 | } |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 741 | |
| 742 | if (padding) { |
| 743 | memset(dest, 0, padding); |
| 744 | msg_size += padding; |
| 745 | } |
| 746 | |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 747 | return msg_size; |
| 748 | } |
| 749 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 750 | static inline int netvsc_send_pkt( |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 751 | struct hv_device *device, |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 752 | struct hv_netvsc_packet *packet, |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 753 | struct netvsc_device *net_device, |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 754 | struct hv_page_buffer **pb, |
| 755 | struct sk_buff *skb) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 756 | { |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 757 | struct nvsp_message nvmsg; |
KY Srinivasan | 3a67c9c | 2014-10-05 10:42:51 -0700 | [diff] [blame] | 758 | u16 q_idx = packet->q_idx; |
Vitaly Kuznetsov | 8b9fbe1 | 2015-12-01 16:43:11 -0800 | [diff] [blame] | 759 | struct vmbus_channel *out_channel = net_device->chn_table[q_idx]; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 760 | struct net_device *ndev = hv_get_drvdata(device); |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 761 | u64 req_id; |
| 762 | int ret; |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 763 | struct hv_page_buffer *pgbuf; |
KY Srinivasan | 82fa3c7 | 2015-05-11 15:39:46 -0700 | [diff] [blame] | 764 | u32 ring_avail = hv_ringbuf_avail_percent(&out_channel->outbound); |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 765 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
KY Srinivasan | c25aaf8 | 2014-04-30 10:14:31 -0700 | [diff] [blame] | 766 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 767 | nvmsg.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT; |
KY Srinivasan | 694a9fb | 2015-12-01 16:43:15 -0800 | [diff] [blame] | 768 | if (skb != NULL) { |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 769 | /* 0 is RMC_DATA; */ |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 770 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 0; |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 771 | } else { |
| 772 | /* 1 is RMC_CONTROL; */ |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 773 | nvmsg.msg.v1_msg.send_rndis_pkt.channel_type = 1; |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 774 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 775 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 776 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_index = |
| 777 | packet->send_buf_index; |
| 778 | if (packet->send_buf_index == NETVSC_INVALID_INDEX) |
| 779 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0; |
| 780 | else |
| 781 | nvmsg.msg.v1_msg.send_rndis_pkt.send_buf_section_size = |
| 782 | packet->total_data_buflen; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 783 | |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 784 | req_id = (ulong)skb; |
Haiyang Zhang | f1ea3cd | 2013-04-05 11:44:40 +0000 | [diff] [blame] | 785 | |
Haiyang Zhang | c3582a2 | 2014-12-01 13:28:39 -0800 | [diff] [blame] | 786 | if (out_channel->rescind) |
| 787 | return -ENODEV; |
| 788 | |
KY Srinivasan | 82fa3c7 | 2015-05-11 15:39:46 -0700 | [diff] [blame] | 789 | /* |
| 790 | * It is possible that once we successfully place this packet |
| 791 | * on the ringbuffer, we may stop the queue. In that case, we want |
| 792 | * to notify the host independent of the xmit_more flag. We don't |
| 793 | * need to be precise here; in the worst case we may signal the host |
| 794 | * unnecessarily. |
| 795 | */ |
| 796 | if (ring_avail < (RING_AVAIL_PERCENT_LOWATER + 1)) |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 797 | xmit_more = false; |
KY Srinivasan | 82fa3c7 | 2015-05-11 15:39:46 -0700 | [diff] [blame] | 798 | |
Haiyang Zhang | 72a2f5b | 2010-12-10 12:03:58 -0800 | [diff] [blame] | 799 | if (packet->page_buf_cnt) { |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 800 | pgbuf = packet->cp_partial ? (*pb) + |
| 801 | packet->rmsg_pgcnt : (*pb); |
KY Srinivasan | 82fa3c7 | 2015-05-11 15:39:46 -0700 | [diff] [blame] | 802 | ret = vmbus_sendpacket_pagebuffer_ctl(out_channel, |
| 803 | pgbuf, |
| 804 | packet->page_buf_cnt, |
| 805 | &nvmsg, |
| 806 | sizeof(struct nvsp_message), |
| 807 | req_id, |
| 808 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 809 | !xmit_more); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 810 | } else { |
KY Srinivasan | 82fa3c7 | 2015-05-11 15:39:46 -0700 | [diff] [blame] | 811 | ret = vmbus_sendpacket_ctl(out_channel, &nvmsg, |
| 812 | sizeof(struct nvsp_message), |
| 813 | req_id, |
| 814 | VM_PKT_DATA_INBAND, |
| 815 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED, |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 816 | !xmit_more); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 817 | } |
| 818 | |
Haiyang Zhang | 1d06825 | 2011-12-02 11:56:25 -0800 | [diff] [blame] | 819 | if (ret == 0) { |
| 820 | atomic_inc(&net_device->num_outstanding_sends); |
KY Srinivasan | 3a67c9c | 2014-10-05 10:42:51 -0700 | [diff] [blame] | 821 | atomic_inc(&net_device->queue_sends[q_idx]); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 822 | |
KY Srinivasan | 82fa3c7 | 2015-05-11 15:39:46 -0700 | [diff] [blame] | 823 | if (ring_avail < RING_AVAIL_PERCENT_LOWATER) { |
| 824 | netif_tx_stop_queue(netdev_get_tx_queue(ndev, q_idx)); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 825 | |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 826 | if (atomic_read(&net_device-> |
KY Srinivasan | 3a67c9c | 2014-10-05 10:42:51 -0700 | [diff] [blame] | 827 | queue_sends[q_idx]) < 1) |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 828 | netif_tx_wake_queue(netdev_get_tx_queue( |
KY Srinivasan | 3a67c9c | 2014-10-05 10:42:51 -0700 | [diff] [blame] | 829 | ndev, q_idx)); |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 830 | } |
Haiyang Zhang | 1d06825 | 2011-12-02 11:56:25 -0800 | [diff] [blame] | 831 | } else if (ret == -EAGAIN) { |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 832 | netif_tx_stop_queue(netdev_get_tx_queue( |
KY Srinivasan | 3a67c9c | 2014-10-05 10:42:51 -0700 | [diff] [blame] | 833 | ndev, q_idx)); |
| 834 | if (atomic_read(&net_device->queue_sends[q_idx]) < 1) { |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 835 | netif_tx_wake_queue(netdev_get_tx_queue( |
KY Srinivasan | 3a67c9c | 2014-10-05 10:42:51 -0700 | [diff] [blame] | 836 | ndev, q_idx)); |
Haiyang Zhang | 33be96e | 2012-03-27 13:20:45 +0000 | [diff] [blame] | 837 | ret = -ENOSPC; |
| 838 | } |
Haiyang Zhang | 1d06825 | 2011-12-02 11:56:25 -0800 | [diff] [blame] | 839 | } else { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 840 | netdev_err(ndev, "Unable to send packet %p ret %d\n", |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 841 | packet, ret); |
Haiyang Zhang | 1d06825 | 2011-12-02 11:56:25 -0800 | [diff] [blame] | 842 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 843 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 844 | return ret; |
| 845 | } |
| 846 | |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 847 | /* Move packet out of multi send data (msd), and clear msd */ |
| 848 | static inline void move_pkt_msd(struct hv_netvsc_packet **msd_send, |
| 849 | struct sk_buff **msd_skb, |
| 850 | struct multi_send_data *msdp) |
| 851 | { |
| 852 | *msd_skb = msdp->skb; |
| 853 | *msd_send = msdp->pkt; |
| 854 | msdp->skb = NULL; |
| 855 | msdp->pkt = NULL; |
| 856 | msdp->count = 0; |
| 857 | } |
| 858 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 859 | int netvsc_send(struct hv_device *device, |
KY Srinivasan | 2447676 | 2015-12-01 16:43:06 -0800 | [diff] [blame] | 860 | struct hv_netvsc_packet *packet, |
KY Srinivasan | a9f2e2d | 2015-12-01 16:43:13 -0800 | [diff] [blame] | 861 | struct rndis_message *rndis_msg, |
KY Srinivasan | 3a3d9a0 | 2015-12-01 16:43:14 -0800 | [diff] [blame] | 862 | struct hv_page_buffer **pb, |
| 863 | struct sk_buff *skb) |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 864 | { |
| 865 | struct netvsc_device *net_device; |
| 866 | int ret = 0, m_ret = 0; |
| 867 | struct vmbus_channel *out_channel; |
| 868 | u16 q_idx = packet->q_idx; |
| 869 | u32 pktlen = packet->total_data_buflen, msd_len = 0; |
| 870 | unsigned int section_index = NETVSC_INVALID_INDEX; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 871 | struct multi_send_data *msdp; |
| 872 | struct hv_netvsc_packet *msd_send = NULL, *cur_send = NULL; |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 873 | struct sk_buff *msd_skb = NULL; |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 874 | bool try_batch; |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 875 | bool xmit_more = (skb != NULL) ? skb->xmit_more : false; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 876 | |
| 877 | net_device = get_outbound_net_device(device); |
| 878 | if (!net_device) |
| 879 | return -ENODEV; |
| 880 | |
Vitaly Kuznetsov | 8b9fbe1 | 2015-12-01 16:43:11 -0800 | [diff] [blame] | 881 | out_channel = net_device->chn_table[q_idx]; |
KY Srinivasan | 25b85ee | 2015-12-01 16:43:05 -0800 | [diff] [blame] | 882 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 883 | packet->send_buf_index = NETVSC_INVALID_INDEX; |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 884 | packet->cp_partial = false; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 885 | |
Haiyang Zhang | cf8190e | 2015-12-10 12:19:35 -0800 | [diff] [blame] | 886 | /* Send control message directly without accessing msd (Multi-Send |
| 887 | * Data) field which may be changed during data packet processing. |
| 888 | */ |
| 889 | if (!skb) { |
| 890 | cur_send = packet; |
| 891 | goto send_now; |
| 892 | } |
| 893 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 894 | msdp = &net_device->msd[q_idx]; |
| 895 | |
| 896 | /* batch packets in send buffer if possible */ |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 897 | if (msdp->pkt) |
| 898 | msd_len = msdp->pkt->total_data_buflen; |
| 899 | |
KY Srinivasan | 694a9fb | 2015-12-01 16:43:15 -0800 | [diff] [blame] | 900 | try_batch = (skb != NULL) && msd_len > 0 && msdp->count < |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 901 | net_device->max_pkt; |
| 902 | |
| 903 | if (try_batch && msd_len + pktlen + net_device->pkt_align < |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 904 | net_device->send_section_size) { |
| 905 | section_index = msdp->pkt->send_buf_index; |
| 906 | |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 907 | } else if (try_batch && msd_len + packet->rmsg_size < |
| 908 | net_device->send_section_size) { |
| 909 | section_index = msdp->pkt->send_buf_index; |
| 910 | packet->cp_partial = true; |
| 911 | |
KY Srinivasan | 694a9fb | 2015-12-01 16:43:15 -0800 | [diff] [blame] | 912 | } else if ((skb != NULL) && pktlen + net_device->pkt_align < |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 913 | net_device->send_section_size) { |
| 914 | section_index = netvsc_get_next_send_section(net_device); |
| 915 | if (section_index != NETVSC_INVALID_INDEX) { |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 916 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
| 917 | msd_len = 0; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 918 | } |
| 919 | } |
| 920 | |
| 921 | if (section_index != NETVSC_INVALID_INDEX) { |
| 922 | netvsc_copy_to_send_buf(net_device, |
| 923 | section_index, msd_len, |
KY Srinivasan | 694a9fb | 2015-12-01 16:43:15 -0800 | [diff] [blame] | 924 | packet, rndis_msg, pb, skb); |
KY Srinivasan | b08cc79 | 2015-03-29 21:08:42 -0700 | [diff] [blame] | 925 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 926 | packet->send_buf_index = section_index; |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 927 | |
| 928 | if (packet->cp_partial) { |
| 929 | packet->page_buf_cnt -= packet->rmsg_pgcnt; |
| 930 | packet->total_data_buflen = msd_len + packet->rmsg_size; |
| 931 | } else { |
| 932 | packet->page_buf_cnt = 0; |
| 933 | packet->total_data_buflen += msd_len; |
Haiyang Zhang | aa0a34b | 2015-04-13 16:34:35 -0700 | [diff] [blame] | 934 | } |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 935 | |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 936 | if (msdp->skb) |
| 937 | dev_kfree_skb_any(msdp->skb); |
Haiyang Zhang | ee90b81 | 2015-04-06 15:22:54 -0700 | [diff] [blame] | 938 | |
KY Srinivasan | bde79be | 2015-12-01 16:43:17 -0800 | [diff] [blame] | 939 | if (xmit_more && !packet->cp_partial) { |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 940 | msdp->skb = skb; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 941 | msdp->pkt = packet; |
| 942 | msdp->count++; |
| 943 | } else { |
| 944 | cur_send = packet; |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 945 | msdp->skb = NULL; |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 946 | msdp->pkt = NULL; |
| 947 | msdp->count = 0; |
| 948 | } |
| 949 | } else { |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 950 | move_pkt_msd(&msd_send, &msd_skb, msdp); |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 951 | cur_send = packet; |
| 952 | } |
| 953 | |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 954 | if (msd_send) { |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 955 | m_ret = netvsc_send_pkt(device, msd_send, net_device, |
| 956 | NULL, msd_skb); |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 957 | |
| 958 | if (m_ret != 0) { |
| 959 | netvsc_free_send_slot(net_device, |
| 960 | msd_send->send_buf_index); |
Haiyang Zhang | c85e492 | 2016-01-25 09:49:31 -0800 | [diff] [blame] | 961 | dev_kfree_skb_any(msd_skb); |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 962 | } |
| 963 | } |
| 964 | |
Haiyang Zhang | cf8190e | 2015-12-10 12:19:35 -0800 | [diff] [blame] | 965 | send_now: |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 966 | if (cur_send) |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 967 | ret = netvsc_send_pkt(device, cur_send, net_device, pb, skb); |
Haiyang Zhang | 7c3877f | 2015-03-26 09:03:37 -0700 | [diff] [blame] | 968 | |
Jerry Snitselaar | 7aab515 | 2015-05-04 10:57:16 -0700 | [diff] [blame] | 969 | if (ret != 0 && section_index != NETVSC_INVALID_INDEX) |
| 970 | netvsc_free_send_slot(net_device, section_index); |
Haiyang Zhang | d953ca4 | 2015-01-29 12:34:49 -0800 | [diff] [blame] | 971 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 972 | return ret; |
| 973 | } |
| 974 | |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 975 | static void netvsc_send_recv_completion(struct hv_device *device, |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 976 | struct vmbus_channel *channel, |
KY Srinivasan | 97c1723 | 2014-02-16 16:38:44 -0800 | [diff] [blame] | 977 | struct netvsc_device *net_device, |
Haiyang Zhang | 63f6921 | 2012-10-02 05:30:23 +0000 | [diff] [blame] | 978 | u64 transaction_id, u32 status) |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 979 | { |
| 980 | struct nvsp_message recvcompMessage; |
| 981 | int retries = 0; |
| 982 | int ret; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 983 | struct net_device *ndev = hv_get_drvdata(device); |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 984 | |
| 985 | recvcompMessage.hdr.msg_type = |
| 986 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE; |
| 987 | |
Haiyang Zhang | 63f6921 | 2012-10-02 05:30:23 +0000 | [diff] [blame] | 988 | recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status = status; |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 989 | |
| 990 | retry_send_cmplt: |
| 991 | /* Send the completion */ |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 992 | ret = vmbus_sendpacket(channel, &recvcompMessage, |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 993 | sizeof(struct nvsp_message), transaction_id, |
| 994 | VM_PKT_COMP, 0); |
| 995 | if (ret == 0) { |
| 996 | /* success */ |
| 997 | /* no-op */ |
K. Y. Srinivasan | d2598f0 | 2011-08-25 09:48:58 -0700 | [diff] [blame] | 998 | } else if (ret == -EAGAIN) { |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 999 | /* no more room...wait a bit and attempt to retry 3 times */ |
| 1000 | retries++; |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1001 | netdev_err(ndev, "unable to send receive completion pkt" |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1002 | " (tid %llx)...retrying %d\n", transaction_id, retries); |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 1003 | |
| 1004 | if (retries < 4) { |
| 1005 | udelay(100); |
| 1006 | goto retry_send_cmplt; |
| 1007 | } else { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1008 | netdev_err(ndev, "unable to send receive " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1009 | "completion pkt (tid %llx)...give up retrying\n", |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 1010 | transaction_id); |
| 1011 | } |
| 1012 | } else { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1013 | netdev_err(ndev, "unable to send receive " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1014 | "completion pkt - %llx\n", transaction_id); |
Haiyang Zhang | 5fa9d3c | 2011-04-21 12:30:42 -0700 | [diff] [blame] | 1015 | } |
| 1016 | } |
| 1017 | |
KY Srinivasan | 97c1723 | 2014-02-16 16:38:44 -0800 | [diff] [blame] | 1018 | static void netvsc_receive(struct netvsc_device *net_device, |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1019 | struct vmbus_channel *channel, |
KY Srinivasan | 97c1723 | 2014-02-16 16:38:44 -0800 | [diff] [blame] | 1020 | struct hv_device *device, |
| 1021 | struct vmpacket_descriptor *packet) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1022 | { |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1023 | struct vmtransfer_page_packet_header *vmxferpage_packet; |
| 1024 | struct nvsp_message *nvsp_packet; |
Haiyang Zhang | 4baab26 | 2014-04-21 14:54:43 -0700 | [diff] [blame] | 1025 | struct hv_netvsc_packet nv_pkt; |
| 1026 | struct hv_netvsc_packet *netvsc_packet = &nv_pkt; |
| 1027 | u32 status = NVSP_STAT_SUCCESS; |
Haiyang Zhang | 4532634 | 2011-12-15 13:45:15 -0800 | [diff] [blame] | 1028 | int i; |
| 1029 | int count = 0; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1030 | struct net_device *ndev = hv_get_drvdata(device); |
KY Srinivasan | c4b20c6 | 2015-12-01 16:43:07 -0800 | [diff] [blame] | 1031 | void *data; |
K. Y. Srinivasan | 779b4d1 | 2011-04-26 09:20:22 -0700 | [diff] [blame] | 1032 | |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1033 | /* |
| 1034 | * All inbound packets other than send completion should be xfer page |
| 1035 | * packet |
| 1036 | */ |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 1037 | if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1038 | netdev_err(ndev, "Unknown packet type received - %d\n", |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 1039 | packet->type); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1040 | return; |
| 1041 | } |
| 1042 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1043 | nvsp_packet = (struct nvsp_message *)((unsigned long)packet + |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 1044 | (packet->offset8 << 3)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1045 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1046 | /* Make sure this is a valid nvsp packet */ |
Haiyang Zhang | 53d21fd | 2010-12-10 12:03:59 -0800 | [diff] [blame] | 1047 | if (nvsp_packet->hdr.msg_type != |
| 1048 | NVSP_MSG1_TYPE_SEND_RNDIS_PKT) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1049 | netdev_err(ndev, "Unknown nvsp packet type received-" |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1050 | " %d\n", nvsp_packet->hdr.msg_type); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1051 | return; |
| 1052 | } |
| 1053 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1054 | vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1055 | |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 1056 | if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1057 | netdev_err(ndev, "Invalid xfer page set id - " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1058 | "expecting %x got %x\n", NETVSC_RECEIVE_BUFFER_ID, |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 1059 | vmxferpage_packet->xfer_pageset_id); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1060 | return; |
| 1061 | } |
| 1062 | |
Haiyang Zhang | 4baab26 | 2014-04-21 14:54:43 -0700 | [diff] [blame] | 1063 | count = vmxferpage_packet->range_cnt; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1064 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1065 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
Haiyang Zhang | 4baab26 | 2014-04-21 14:54:43 -0700 | [diff] [blame] | 1066 | for (i = 0; i < count; i++) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1067 | /* Initialize the netvsc packet */ |
KY Srinivasan | c4b20c6 | 2015-12-01 16:43:07 -0800 | [diff] [blame] | 1068 | data = (void *)((unsigned long)net_device-> |
Haiyang Zhang | 4532634 | 2011-12-15 13:45:15 -0800 | [diff] [blame] | 1069 | recv_buf + vmxferpage_packet->ranges[i].byte_offset); |
Haiyang Zhang | 72a2f5b | 2010-12-10 12:03:58 -0800 | [diff] [blame] | 1070 | netvsc_packet->total_data_buflen = |
Haiyang Zhang | 415f228 | 2011-01-26 12:12:13 -0800 | [diff] [blame] | 1071 | vmxferpage_packet->ranges[i].byte_count; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1072 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1073 | /* Pass it to the upper layer */ |
KY Srinivasan | 10082f9 | 2015-12-01 16:43:18 -0800 | [diff] [blame] | 1074 | status = rndis_filter_receive(device, netvsc_packet, &data, |
| 1075 | channel); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1076 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1077 | } |
| 1078 | |
Haiyang Zhang | 4baab26 | 2014-04-21 14:54:43 -0700 | [diff] [blame] | 1079 | netvsc_send_recv_completion(device, channel, net_device, |
| 1080 | vmxferpage_packet->d.trans_id, status); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1081 | } |
| 1082 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1083 | |
| 1084 | static void netvsc_send_table(struct hv_device *hdev, |
Haiyang Zhang | 71790a2 | 2015-07-24 10:08:40 -0700 | [diff] [blame] | 1085 | struct nvsp_message *nvmsg) |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1086 | { |
| 1087 | struct netvsc_device *nvscdev; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1088 | struct net_device *ndev = hv_get_drvdata(hdev); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1089 | int i; |
| 1090 | u32 count, *tab; |
| 1091 | |
| 1092 | nvscdev = get_outbound_net_device(hdev); |
| 1093 | if (!nvscdev) |
| 1094 | return; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1095 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1096 | count = nvmsg->msg.v5_msg.send_table.count; |
| 1097 | if (count != VRSS_SEND_TAB_SIZE) { |
| 1098 | netdev_err(ndev, "Received wrong send-table size:%u\n", count); |
| 1099 | return; |
| 1100 | } |
| 1101 | |
| 1102 | tab = (u32 *)((unsigned long)&nvmsg->msg.v5_msg.send_table + |
| 1103 | nvmsg->msg.v5_msg.send_table.offset); |
| 1104 | |
| 1105 | for (i = 0; i < count; i++) |
| 1106 | nvscdev->send_table[i] = tab[i]; |
| 1107 | } |
| 1108 | |
Haiyang Zhang | 71790a2 | 2015-07-24 10:08:40 -0700 | [diff] [blame] | 1109 | static void netvsc_send_vf(struct netvsc_device *nvdev, |
| 1110 | struct nvsp_message *nvmsg) |
| 1111 | { |
| 1112 | nvdev->vf_alloc = nvmsg->msg.v4_msg.vf_assoc.allocated; |
| 1113 | nvdev->vf_serial = nvmsg->msg.v4_msg.vf_assoc.serial; |
| 1114 | } |
| 1115 | |
| 1116 | static inline void netvsc_receive_inband(struct hv_device *hdev, |
| 1117 | struct netvsc_device *nvdev, |
| 1118 | struct nvsp_message *nvmsg) |
| 1119 | { |
| 1120 | switch (nvmsg->hdr.msg_type) { |
| 1121 | case NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE: |
| 1122 | netvsc_send_table(hdev, nvmsg); |
| 1123 | break; |
| 1124 | |
| 1125 | case NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION: |
| 1126 | netvsc_send_vf(nvdev, nvmsg); |
| 1127 | break; |
| 1128 | } |
| 1129 | } |
| 1130 | |
K. Y. Srinivasan | 99a50bb | 2016-07-05 16:52:46 -0700 | [diff] [blame] | 1131 | static void netvsc_process_raw_pkt(struct hv_device *device, |
| 1132 | struct vmbus_channel *channel, |
| 1133 | struct netvsc_device *net_device, |
| 1134 | struct net_device *ndev, |
| 1135 | u64 request_id, |
| 1136 | struct vmpacket_descriptor *desc) |
| 1137 | { |
| 1138 | struct nvsp_message *nvmsg; |
| 1139 | |
| 1140 | nvmsg = (struct nvsp_message *)((unsigned long) |
| 1141 | desc + (desc->offset8 << 3)); |
| 1142 | |
| 1143 | switch (desc->type) { |
| 1144 | case VM_PKT_COMP: |
| 1145 | netvsc_send_completion(net_device, channel, device, desc); |
| 1146 | break; |
| 1147 | |
| 1148 | case VM_PKT_DATA_USING_XFER_PAGES: |
| 1149 | netvsc_receive(net_device, channel, device, desc); |
| 1150 | break; |
| 1151 | |
| 1152 | case VM_PKT_DATA_INBAND: |
| 1153 | netvsc_receive_inband(device, net_device, nvmsg); |
| 1154 | break; |
| 1155 | |
| 1156 | default: |
| 1157 | netdev_err(ndev, "unhandled packet type %d, tid %llx\n", |
| 1158 | desc->type, request_id); |
| 1159 | break; |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1164 | void netvsc_channel_cb(void *context) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1165 | { |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1166 | int ret; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1167 | struct vmbus_channel *channel = (struct vmbus_channel *)context; |
| 1168 | struct hv_device *device; |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1169 | struct netvsc_device *net_device; |
| 1170 | u32 bytes_recvd; |
| 1171 | u64 request_id; |
Greg Kroah-Hartman | 8dc0a06 | 2009-08-27 16:02:36 -0700 | [diff] [blame] | 1172 | struct vmpacket_descriptor *desc; |
Bill Pemberton | c6fcf0b | 2010-04-27 16:23:47 -0400 | [diff] [blame] | 1173 | unsigned char *buffer; |
| 1174 | int bufferlen = NETVSC_PACKET_SIZE; |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1175 | struct net_device *ndev; |
K. Y. Srinivasan | 99a50bb | 2016-07-05 16:52:46 -0700 | [diff] [blame] | 1176 | bool need_to_commit = false; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1177 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1178 | if (channel->primary_channel != NULL) |
| 1179 | device = channel->primary_channel->device_obj; |
| 1180 | else |
| 1181 | device = channel->device_obj; |
| 1182 | |
Haiyang Zhang | 5a71ae3 | 2010-12-10 12:03:55 -0800 | [diff] [blame] | 1183 | net_device = get_inbound_net_device(device); |
K. Y. Srinivasan | 2ddd5e5 | 2011-09-13 10:59:49 -0700 | [diff] [blame] | 1184 | if (!net_device) |
KY Srinivasan | ee0c4c3 | 2014-02-16 16:38:45 -0800 | [diff] [blame] | 1185 | return; |
Vitaly Kuznetsov | 0a1275c | 2016-05-13 13:55:23 +0200 | [diff] [blame] | 1186 | ndev = hv_get_drvdata(device); |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1187 | buffer = get_per_channel_state(channel); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1188 | |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1189 | do { |
K. Y. Srinivasan | 99a50bb | 2016-07-05 16:52:46 -0700 | [diff] [blame] | 1190 | desc = get_next_pkt_raw(channel); |
| 1191 | if (desc != NULL) { |
| 1192 | netvsc_process_raw_pkt(device, |
| 1193 | channel, |
| 1194 | net_device, |
| 1195 | ndev, |
| 1196 | desc->trans_id, |
| 1197 | desc); |
| 1198 | |
| 1199 | put_pkt_raw(channel, desc); |
| 1200 | need_to_commit = true; |
| 1201 | continue; |
| 1202 | } |
| 1203 | if (need_to_commit) { |
| 1204 | need_to_commit = false; |
| 1205 | commit_rd_index(channel); |
| 1206 | } |
| 1207 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1208 | ret = vmbus_recvpacket_raw(channel, buffer, bufferlen, |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1209 | &bytes_recvd, &request_id); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1210 | if (ret == 0) { |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1211 | if (bytes_recvd > 0) { |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1212 | desc = (struct vmpacket_descriptor *)buffer; |
K. Y. Srinivasan | 99a50bb | 2016-07-05 16:52:46 -0700 | [diff] [blame] | 1213 | netvsc_process_raw_pkt(device, |
| 1214 | channel, |
| 1215 | net_device, |
| 1216 | ndev, |
| 1217 | request_id, |
| 1218 | desc); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1219 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1220 | |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1221 | } else { |
KY Srinivasan | ee0c4c3 | 2014-02-16 16:38:45 -0800 | [diff] [blame] | 1222 | /* |
| 1223 | * We are done for this pass. |
| 1224 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1225 | break; |
| 1226 | } |
KY Srinivasan | ee0c4c3 | 2014-02-16 16:38:45 -0800 | [diff] [blame] | 1227 | |
K. Y. Srinivasan | 3d5cad9 | 2011-08-25 09:48:59 -0700 | [diff] [blame] | 1228 | } else if (ret == -ENOBUFS) { |
KY Srinivasan | ee0c4c3 | 2014-02-16 16:38:45 -0800 | [diff] [blame] | 1229 | if (bufferlen > NETVSC_PACKET_SIZE) |
| 1230 | kfree(buffer); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1231 | /* Handle large packet */ |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1232 | buffer = kmalloc(bytes_recvd, GFP_ATOMIC); |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1233 | if (buffer == NULL) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 1234 | /* Try again next time around */ |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1235 | netdev_err(ndev, |
Greg Kroah-Hartman | 21a80820 | 2009-09-02 10:33:05 -0700 | [diff] [blame] | 1236 | "unable to allocate buffer of size " |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1237 | "(%d)!!\n", bytes_recvd); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1238 | break; |
| 1239 | } |
| 1240 | |
Haiyang Zhang | 85799a3 | 2010-12-10 12:03:54 -0800 | [diff] [blame] | 1241 | bufferlen = bytes_recvd; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1242 | } |
| 1243 | } while (1); |
| 1244 | |
KY Srinivasan | ee0c4c3 | 2014-02-16 16:38:45 -0800 | [diff] [blame] | 1245 | if (bufferlen > NETVSC_PACKET_SIZE) |
| 1246 | kfree(buffer); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1247 | return; |
| 1248 | } |
Haiyang Zhang | af24ce4 | 2011-04-21 12:30:40 -0700 | [diff] [blame] | 1249 | |
| 1250 | /* |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1251 | * netvsc_device_add - Callback when the device belonging to this |
| 1252 | * driver is added |
| 1253 | */ |
K. Y. Srinivasan | 7bd23a4 | 2011-05-10 07:54:53 -0700 | [diff] [blame] | 1254 | int netvsc_device_add(struct hv_device *device, void *additional_info) |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1255 | { |
Vitaly Kuznetsov | 8809883 | 2016-05-13 13:55:25 +0200 | [diff] [blame] | 1256 | int i, ret = 0; |
K. Y. Srinivasan | aae2398 | 2011-05-12 19:35:05 -0700 | [diff] [blame] | 1257 | int ring_size = |
| 1258 | ((struct netvsc_device_info *)additional_info)->ring_size; |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1259 | struct netvsc_device *net_device; |
Vitaly Kuznetsov | 8809883 | 2016-05-13 13:55:25 +0200 | [diff] [blame] | 1260 | struct net_device *ndev = hv_get_drvdata(device); |
| 1261 | struct net_device_context *net_device_ctx = netdev_priv(ndev); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1262 | |
Vitaly Kuznetsov | 8809883 | 2016-05-13 13:55:25 +0200 | [diff] [blame] | 1263 | net_device = alloc_net_device(); |
Dan Carpenter | b1c8492 | 2014-09-04 14:11:23 +0300 | [diff] [blame] | 1264 | if (!net_device) |
| 1265 | return -ENOMEM; |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1266 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1267 | net_device->ring_size = ring_size; |
| 1268 | |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1269 | /* Initialize the NetVSC channel extension */ |
K. Y. Srinivasan | 35abb21 | 2011-05-10 07:55:41 -0700 | [diff] [blame] | 1270 | init_completion(&net_device->channel_init_wait); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1271 | |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1272 | set_per_channel_state(device->channel, net_device->cb_buffer); |
| 1273 | |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1274 | /* Open the channel */ |
K. Y. Srinivasan | aae2398 | 2011-05-12 19:35:05 -0700 | [diff] [blame] | 1275 | ret = vmbus_open(device->channel, ring_size * PAGE_SIZE, |
| 1276 | ring_size * PAGE_SIZE, NULL, 0, |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1277 | netvsc_channel_cb, device->channel); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1278 | |
| 1279 | if (ret != 0) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1280 | netdev_err(ndev, "unable to open channel: %d\n", ret); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1281 | goto cleanup; |
| 1282 | } |
| 1283 | |
| 1284 | /* Channel is opened */ |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1285 | pr_info("hv_netvsc channel opened successfully\n"); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1286 | |
Vitaly Kuznetsov | 8809883 | 2016-05-13 13:55:25 +0200 | [diff] [blame] | 1287 | /* If we're reopening the device we may have multiple queues, fill the |
| 1288 | * chn_table with the default channel to use it before subchannels are |
| 1289 | * opened. |
| 1290 | */ |
| 1291 | for (i = 0; i < VRSS_CHANNEL_MAX; i++) |
| 1292 | net_device->chn_table[i] = device->channel; |
| 1293 | |
| 1294 | /* Writing nvdev pointer unlocks netvsc_send(), make sure chn_table is |
| 1295 | * populated. |
| 1296 | */ |
| 1297 | wmb(); |
| 1298 | |
| 1299 | net_device_ctx->nvdev = net_device; |
Haiyang Zhang | 5b54dac | 2014-04-21 10:20:28 -0700 | [diff] [blame] | 1300 | |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1301 | /* Connect with the NetVsp */ |
| 1302 | ret = netvsc_connect_vsp(device); |
| 1303 | if (ret != 0) { |
Haiyang Zhang | d987115 | 2011-09-01 12:19:41 -0700 | [diff] [blame] | 1304 | netdev_err(ndev, |
Haiyang Zhang | c909ebb | 2011-09-01 12:19:40 -0700 | [diff] [blame] | 1305 | "unable to connect to NetVSP - %d\n", ret); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1306 | goto close; |
| 1307 | } |
| 1308 | |
| 1309 | return ret; |
| 1310 | |
| 1311 | close: |
| 1312 | /* Now, we can close the channel safely */ |
| 1313 | vmbus_close(device->channel); |
| 1314 | |
| 1315 | cleanup: |
Haiyang Zhang | f90251c | 2014-08-15 19:18:19 +0000 | [diff] [blame] | 1316 | free_netvsc_device(net_device); |
Haiyang Zhang | b637e02 | 2011-04-21 12:30:45 -0700 | [diff] [blame] | 1317 | |
| 1318 | return ret; |
| 1319 | } |