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 |
| 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 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 19 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 20 | #include <linux/init.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/highmem.h> |
| 23 | #include <linux/device.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 24 | #include <linux/io.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 25 | #include <linux/delay.h> |
| 26 | #include <linux/netdevice.h> |
| 27 | #include <linux/inetdevice.h> |
| 28 | #include <linux/etherdevice.h> |
| 29 | #include <linux/skbuff.h> |
| 30 | #include <linux/in.h> |
| 31 | #include <net/arp.h> |
| 32 | #include <net/route.h> |
| 33 | #include <net/sock.h> |
| 34 | #include <net/pkt_sched.h> |
Greg Kroah-Hartman | 4983b39 | 2009-08-19 16:14:47 -0700 | [diff] [blame] | 35 | #include "osd.h" |
Greg Kroah-Hartman | 645954c | 2009-08-28 16:22:59 -0700 | [diff] [blame] | 36 | #include "logging.h" |
Greg Kroah-Hartman | 870cde8 | 2009-08-19 16:21:28 -0700 | [diff] [blame] | 37 | #include "vmbus.h" |
Greg Kroah-Hartman | cc21181 | 2009-08-28 16:23:17 -0700 | [diff] [blame] | 38 | #include "NetVscApi.h" |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 39 | |
| 40 | MODULE_LICENSE("GPL"); |
| 41 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 42 | static int netvsc_probe(struct device *device); |
| 43 | static int netvsc_remove(struct device *device); |
| 44 | static int netvsc_open(struct net_device *net); |
| 45 | static void netvsc_xmit_completion(void *context); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 46 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net); |
| 47 | static int netvsc_recv_callback(struct hv_device *device_obj, |
| 48 | struct hv_netvsc_packet *Packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 49 | static int netvsc_close(struct net_device *net); |
| 50 | static struct net_device_stats *netvsc_get_stats(struct net_device *net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 51 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, |
| 52 | unsigned int status); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 53 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 54 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 55 | struct net_device_context { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 56 | /* point back to our device context */ |
| 57 | struct device_context *device_ctx; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 58 | struct net_device_stats stats; |
| 59 | }; |
| 60 | |
| 61 | struct netvsc_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 62 | /* !! These must be the first 2 fields !! */ |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 63 | /* Which is a bug FIXME! */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 64 | struct driver_context drv_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 65 | struct netvsc_driver drv_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 68 | static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; |
| 69 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 70 | /* The one and only one */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 71 | static struct netvsc_driver_context g_netvsc_drv; |
| 72 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 73 | static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 74 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 75 | struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; |
| 76 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 77 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 78 | |
| 79 | DPRINT_ENTER(NETVSC_DRV); |
| 80 | |
| 81 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); |
| 82 | |
| 83 | net_drv_obj->RingBufferSize = netvsc_ringbuffer_size; |
| 84 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; |
| 85 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; |
| 86 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 87 | /* Callback to client driver to complete the initialization */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 88 | pfn_drv_init(&net_drv_obj->Base); |
| 89 | |
| 90 | drv_ctx->driver.name = net_drv_obj->Base.name; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 91 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, |
| 92 | sizeof(struct hv_guid)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 93 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 94 | drv_ctx->probe = netvsc_probe; |
| 95 | drv_ctx->remove = netvsc_remove; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 96 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 97 | /* The driver belongs to vmbus */ |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 98 | ret = vmbus_child_driver_register(drv_ctx); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 99 | |
| 100 | DPRINT_EXIT(NETVSC_DRV); |
| 101 | |
| 102 | return ret; |
| 103 | } |
| 104 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 105 | static struct net_device_stats *netvsc_get_stats(struct net_device *net) |
| 106 | { |
| 107 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 108 | |
| 109 | return &net_device_ctx->stats; |
| 110 | } |
| 111 | |
Greg Kroah-Hartman | 4e9bfef | 2009-07-15 12:45:20 -0700 | [diff] [blame] | 112 | static void netvsc_set_multicast_list(struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 113 | { |
| 114 | } |
| 115 | |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 116 | static const struct net_device_ops device_ops = { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 117 | .ndo_open = netvsc_open, |
| 118 | .ndo_stop = netvsc_close, |
| 119 | .ndo_start_xmit = netvsc_start_xmit, |
| 120 | .ndo_get_stats = netvsc_get_stats, |
| 121 | .ndo_set_multicast_list = netvsc_set_multicast_list, |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 124 | static int netvsc_probe(struct device *device) |
| 125 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 126 | struct driver_context *driver_ctx = |
| 127 | driver_to_driver_context(device->driver); |
| 128 | struct netvsc_driver_context *net_drv_ctx = |
| 129 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 130 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 131 | struct device_context *device_ctx = device_to_device_context(device); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 132 | struct hv_device *device_obj = &device_ctx->device_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 133 | struct net_device *net = NULL; |
| 134 | struct net_device_context *net_device_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 135 | struct netvsc_device_info device_info; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 136 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 137 | |
| 138 | DPRINT_ENTER(NETVSC_DRV); |
| 139 | |
| 140 | if (!net_drv_obj->Base.OnDeviceAdd) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 141 | return -1; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 142 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 143 | net = alloc_netdev(sizeof(struct net_device_context), "seth%d", |
| 144 | ether_setup); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 145 | if (!net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 146 | return -1; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 147 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 148 | /* Set initial state */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 149 | netif_carrier_off(net); |
| 150 | netif_stop_queue(net); |
| 151 | |
| 152 | net_device_ctx = netdev_priv(net); |
| 153 | net_device_ctx->device_ctx = device_ctx; |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 154 | dev_set_drvdata(device, net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 155 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 156 | /* Notify the netvsc driver of the new device */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 157 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); |
| 158 | if (ret != 0) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 159 | free_netdev(net); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 160 | dev_set_drvdata(device, NULL); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 161 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 162 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", |
| 163 | ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 164 | return ret; |
| 165 | } |
| 166 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 167 | /* |
| 168 | * If carrier is still off ie we did not get a link status callback, |
| 169 | * update it if necessary |
| 170 | */ |
| 171 | /* |
| 172 | * FIXME: We should use a atomic or test/set instead to avoid getting |
| 173 | * out of sync with the device's link status |
| 174 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 175 | if (!netif_carrier_ok(net)) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 176 | if (!device_info.LinkState) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 177 | netif_carrier_on(net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 178 | |
| 179 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); |
| 180 | |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 181 | net->netdev_ops = &device_ops; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 182 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 183 | SET_NETDEV_DEV(net, device); |
| 184 | |
| 185 | ret = register_netdev(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 186 | if (ret != 0) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 187 | /* Remove the device and release the resource */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 188 | net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 189 | free_netdev(net); |
| 190 | } |
| 191 | |
| 192 | DPRINT_EXIT(NETVSC_DRV); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 193 | return ret; |
| 194 | } |
| 195 | |
| 196 | static int netvsc_remove(struct device *device) |
| 197 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 198 | struct driver_context *driver_ctx = |
| 199 | driver_to_driver_context(device->driver); |
| 200 | struct netvsc_driver_context *net_drv_ctx = |
| 201 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 202 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 203 | struct device_context *device_ctx = device_to_device_context(device); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 204 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 205 | struct hv_device *device_obj = &device_ctx->device_obj; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 206 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 207 | |
| 208 | DPRINT_ENTER(NETVSC_DRV); |
| 209 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 210 | if (net == NULL) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 211 | DPRINT_INFO(NETVSC, "no net device to remove"); |
| 212 | DPRINT_EXIT(NETVSC_DRV); |
| 213 | return 0; |
| 214 | } |
| 215 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 216 | if (!net_drv_obj->Base.OnDeviceRemove) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 217 | DPRINT_EXIT(NETVSC_DRV); |
| 218 | return -1; |
| 219 | } |
| 220 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 221 | /* Stop outbound asap */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 222 | netif_stop_queue(net); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 223 | /* netif_carrier_off(net); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 224 | |
| 225 | unregister_netdev(net); |
| 226 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 227 | /* |
| 228 | * Call to the vsc driver to let it know that the device is being |
| 229 | * removed |
| 230 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 231 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 232 | if (ret != 0) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 233 | /* TODO: */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 234 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); |
| 235 | } |
| 236 | |
| 237 | free_netdev(net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 238 | DPRINT_EXIT(NETVSC_DRV); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 239 | return ret; |
| 240 | } |
| 241 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 242 | static int netvsc_open(struct net_device *net) |
| 243 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 244 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 245 | struct driver_context *driver_ctx = |
| 246 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 247 | struct netvsc_driver_context *net_drv_ctx = |
| 248 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 249 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 250 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 251 | int ret = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 252 | |
| 253 | DPRINT_ENTER(NETVSC_DRV); |
| 254 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 255 | if (netif_carrier_ok(net)) { |
| 256 | memset(&net_device_ctx->stats, 0, |
| 257 | sizeof(struct net_device_stats)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 258 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 259 | /* Open up the device */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 260 | ret = net_drv_obj->OnOpen(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 261 | if (ret != 0) { |
| 262 | DPRINT_ERR(NETVSC_DRV, |
| 263 | "unable to open device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | netif_start_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 268 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 269 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
| 270 | } |
| 271 | |
| 272 | DPRINT_EXIT(NETVSC_DRV); |
| 273 | return ret; |
| 274 | } |
| 275 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 276 | static int netvsc_close(struct net_device *net) |
| 277 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 278 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 279 | struct driver_context *driver_ctx = |
| 280 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 281 | struct netvsc_driver_context *net_drv_ctx = |
| 282 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 283 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 284 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 285 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 286 | |
| 287 | DPRINT_ENTER(NETVSC_DRV); |
| 288 | |
| 289 | netif_stop_queue(net); |
| 290 | |
| 291 | ret = net_drv_obj->OnClose(device_obj); |
| 292 | if (ret != 0) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 293 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 294 | |
| 295 | DPRINT_EXIT(NETVSC_DRV); |
| 296 | |
| 297 | return ret; |
| 298 | } |
| 299 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 300 | static void netvsc_xmit_completion(void *context) |
| 301 | { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 302 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 303 | struct sk_buff *skb = (struct sk_buff *) |
| 304 | (unsigned long)packet->Completion.Send.SendCompletionTid; |
| 305 | struct net_device *net; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 306 | |
| 307 | DPRINT_ENTER(NETVSC_DRV); |
| 308 | |
| 309 | kfree(packet); |
| 310 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 311 | if (skb) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 312 | net = skb->dev; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 313 | dev_kfree_skb_any(skb); |
| 314 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 315 | if (netif_queue_stopped(net)) { |
| 316 | DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", |
| 317 | net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 318 | |
| 319 | netif_wake_queue(net); |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | DPRINT_EXIT(NETVSC_DRV); |
| 324 | } |
| 325 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 326 | static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 327 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 328 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 329 | struct driver_context *driver_ctx = |
| 330 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 331 | struct netvsc_driver_context *net_drv_ctx = |
| 332 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 333 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 334 | struct hv_netvsc_packet *packet; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 335 | int i; |
| 336 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 337 | int num_frags; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 338 | int retries = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 339 | |
| 340 | DPRINT_ENTER(NETVSC_DRV); |
| 341 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 342 | /* Support only 1 chain of frags */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 343 | ASSERT(skb_shinfo(skb)->frag_list == NULL); |
| 344 | ASSERT(skb->dev == net); |
| 345 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 346 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", |
| 347 | skb->len, skb->data_len); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 348 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 349 | /* Add 1 for skb->data and any additional ones requested */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 350 | num_frags = skb_shinfo(skb)->nr_frags + 1 + |
| 351 | net_drv_obj->AdditionalRequestPageBufferCount; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 352 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 353 | /* Allocate a netvsc packet based on # of frags. */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 354 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
| 355 | (num_frags * sizeof(struct hv_page_buffer)) + |
| 356 | net_drv_obj->RequestExtSize, GFP_ATOMIC); |
| 357 | if (!packet) { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 358 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 359 | return -1; |
| 360 | } |
| 361 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 362 | packet->Extension = (void *)(unsigned long)packet + |
| 363 | sizeof(struct hv_netvsc_packet) + |
| 364 | (num_frags * sizeof(struct hv_page_buffer)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 365 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 366 | /* Setup the rndis header */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 367 | packet->PageBufferCount = num_frags; |
| 368 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 369 | /* TODO: Flush all write buffers/ memory fence ??? */ |
| 370 | /* wmb(); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 371 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 372 | /* Initialize it from the skb */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 373 | ASSERT(skb->data); |
| 374 | packet->TotalDataBufferLength = skb->len; |
| 375 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 376 | /* |
| 377 | * Start filling in the page buffers starting at |
| 378 | * AdditionalRequestPageBufferCount offset |
| 379 | */ |
| 380 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
| 381 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1); |
| 382 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 383 | |
| 384 | ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); |
| 385 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 386 | for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1; |
| 387 | i < num_frags; i++) { |
| 388 | packet->PageBuffers[i].Pfn = |
| 389 | page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); |
| 390 | packet->PageBuffers[i].Offset = |
| 391 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; |
| 392 | packet->PageBuffers[i].Length = |
| 393 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 396 | /* Set the completion routine */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 397 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
| 398 | packet->Completion.Send.SendCompletionContext = packet; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 399 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 400 | |
| 401 | retry_send: |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 402 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, |
| 403 | packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 404 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 405 | if (ret == 0) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 406 | ret = NETDEV_TX_OK; |
| 407 | net_device_ctx->stats.tx_bytes += skb->len; |
| 408 | net_device_ctx->stats.tx_packets++; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 409 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 410 | retries++; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 411 | if (retries < 4) { |
| 412 | DPRINT_ERR(NETVSC_DRV, "unable to send..." |
| 413 | "retrying %d...", retries); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 414 | udelay(100); |
| 415 | goto retry_send; |
| 416 | } |
| 417 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 418 | /* no more room or we are shutting down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 419 | DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..." |
| 420 | "marking net device (%p) busy", ret, net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 421 | DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); |
| 422 | |
| 423 | ret = NETDEV_TX_BUSY; |
| 424 | net_device_ctx->stats.tx_dropped++; |
| 425 | |
| 426 | netif_stop_queue(net); |
| 427 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 428 | /* |
| 429 | * Null it since the caller will free it instead of the |
| 430 | * completion routine |
| 431 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 432 | packet->Completion.Send.SendCompletionTid = 0; |
| 433 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 434 | /* |
| 435 | * Release the resources since we will not get any send |
| 436 | * completion |
| 437 | */ |
| 438 | netvsc_xmit_completion((void *)packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 439 | } |
| 440 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 441 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", |
| 442 | net_device_ctx->stats.tx_packets, |
| 443 | net_device_ctx->stats.tx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 444 | |
| 445 | DPRINT_EXIT(NETVSC_DRV); |
| 446 | return ret; |
| 447 | } |
| 448 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 449 | /** |
| 450 | * netvsc_linkstatus_callback - Link up/down notification |
| 451 | */ |
| 452 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, |
| 453 | unsigned int status) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 454 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 455 | struct device_context *device_ctx = to_device_context(device_obj); |
| 456 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 457 | |
| 458 | DPRINT_ENTER(NETVSC_DRV); |
| 459 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 460 | if (!net) { |
| 461 | DPRINT_ERR(NETVSC_DRV, "got link status but net device " |
| 462 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 463 | return; |
| 464 | } |
| 465 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 466 | if (status == 1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 467 | netif_carrier_on(net); |
| 468 | netif_wake_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 469 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 470 | netif_carrier_off(net); |
| 471 | netif_stop_queue(net); |
| 472 | } |
| 473 | DPRINT_EXIT(NETVSC_DRV); |
| 474 | } |
| 475 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 476 | /** |
| 477 | * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device. |
| 478 | */ |
| 479 | static int netvsc_recv_callback(struct hv_device *device_obj, |
| 480 | struct hv_netvsc_packet *packet) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 481 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 482 | struct device_context *device_ctx = to_device_context(device_obj); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 483 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 484 | struct net_device_context *net_device_ctx; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 485 | struct sk_buff *skb; |
| 486 | void *data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 487 | int ret; |
| 488 | int i; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 489 | unsigned long flags; |
| 490 | |
| 491 | DPRINT_ENTER(NETVSC_DRV); |
| 492 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 493 | if (!net) { |
| 494 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " |
| 495 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | net_device_ctx = netdev_priv(net); |
| 500 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 501 | /* Allocate a skb - TODO preallocate this */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 502 | /* Pad 2-bytes to align IP header to 16 bytes */ |
| 503 | skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 504 | ASSERT(skb); |
| 505 | skb_reserve(skb, 2); |
| 506 | skb->dev = net; |
| 507 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 508 | /* for kmap_atomic */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 509 | local_irq_save(flags); |
| 510 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 511 | /* |
| 512 | * Copy to skb. This copy is needed here since the memory pointed by |
| 513 | * hv_netvsc_packet cannot be deallocated |
| 514 | */ |
| 515 | for (i = 0; i < packet->PageBufferCount; i++) { |
| 516 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), |
| 517 | KM_IRQ1); |
| 518 | data = (void *)(unsigned long)data + |
| 519 | packet->PageBuffers[i].Offset; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 520 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 521 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, |
| 522 | packet->PageBuffers[i].Length); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 523 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 524 | kunmap_atomic((void *)((unsigned long)data - |
| 525 | packet->PageBuffers[i].Offset), KM_IRQ1); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | local_irq_restore(flags); |
| 529 | |
| 530 | skb->protocol = eth_type_trans(skb, net); |
| 531 | |
| 532 | skb->ip_summed = CHECKSUM_NONE; |
| 533 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 534 | /* |
| 535 | * Pass the skb back up. Network stack will deallocate the skb when it |
| 536 | * is done |
| 537 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 538 | ret = netif_rx(skb); |
| 539 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 540 | switch (ret) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 541 | case NET_RX_DROP: |
| 542 | net_device_ctx->stats.rx_dropped++; |
| 543 | break; |
| 544 | default: |
| 545 | net_device_ctx->stats.rx_packets++; |
| 546 | net_device_ctx->stats.rx_bytes += skb->len; |
| 547 | break; |
| 548 | |
| 549 | } |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 550 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", |
| 551 | net_device_ctx->stats.rx_packets, |
| 552 | net_device_ctx->stats.rx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 553 | |
| 554 | DPRINT_EXIT(NETVSC_DRV); |
| 555 | |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
| 560 | { |
| 561 | struct device **curr = (struct device **)data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 562 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 563 | *curr = dev; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 564 | /* stop iterating */ |
| 565 | return 1; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 566 | } |
| 567 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 568 | static void netvsc_drv_exit(void) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 569 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 570 | struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; |
| 571 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 572 | struct device *current_dev; |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 573 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 574 | |
| 575 | DPRINT_ENTER(NETVSC_DRV); |
| 576 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 577 | while (1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 578 | current_dev = NULL; |
| 579 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 580 | /* Get the device */ |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 581 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 582 | ¤t_dev, netvsc_drv_exit_cb); |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 583 | if (ret) |
| 584 | DPRINT_WARN(NETVSC_DRV, |
| 585 | "driver_for_each_device returned %d", ret); |
| 586 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 587 | if (current_dev == NULL) |
| 588 | break; |
| 589 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 590 | /* Initiate removal from the top-down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame^] | 591 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", |
| 592 | current_dev); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 593 | |
| 594 | device_unregister(current_dev); |
| 595 | } |
| 596 | |
| 597 | if (netvsc_drv_obj->Base.OnCleanup) |
| 598 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); |
| 599 | |
| 600 | vmbus_child_driver_unregister(drv_ctx); |
| 601 | |
| 602 | DPRINT_EXIT(NETVSC_DRV); |
| 603 | |
| 604 | return; |
| 605 | } |
| 606 | |
| 607 | static int __init netvsc_init(void) |
| 608 | { |
| 609 | int ret; |
| 610 | |
| 611 | DPRINT_ENTER(NETVSC_DRV); |
| 612 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); |
| 613 | |
| 614 | ret = netvsc_drv_init(NetVscInitialize); |
| 615 | |
| 616 | DPRINT_EXIT(NETVSC_DRV); |
| 617 | |
| 618 | return ret; |
| 619 | } |
| 620 | |
| 621 | static void __exit netvsc_exit(void) |
| 622 | { |
| 623 | DPRINT_ENTER(NETVSC_DRV); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 624 | netvsc_drv_exit(); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 625 | DPRINT_EXIT(NETVSC_DRV); |
| 626 | } |
| 627 | |
| 628 | module_param(netvsc_ringbuffer_size, int, S_IRUGO); |
| 629 | |
| 630 | module_init(netvsc_init); |
| 631 | module_exit(netvsc_exit); |