Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) 2009, Microsoft Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 16 | * Place - Suite 330, Boston, MA 02111-1307 USA. |
| 17 | * |
| 18 | * Authors: |
| 19 | * Hank Janssen <hjanssen@microsoft.com> |
| 20 | * |
| 21 | */ |
| 22 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 23 | #include <linux/init.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/highmem.h> |
| 26 | #include <linux/device.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 27 | #include <linux/io.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 28 | #include <linux/delay.h> |
| 29 | #include <linux/netdevice.h> |
| 30 | #include <linux/inetdevice.h> |
| 31 | #include <linux/etherdevice.h> |
| 32 | #include <linux/skbuff.h> |
| 33 | #include <linux/in.h> |
| 34 | #include <net/arp.h> |
| 35 | #include <net/route.h> |
| 36 | #include <net/sock.h> |
| 37 | #include <net/pkt_sched.h> |
| 38 | |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 39 | #include "include/logging.h" |
| 40 | #include "include/vmbus.h" |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 41 | |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 42 | #include "include/NetVscApi.h" |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 43 | |
| 44 | MODULE_LICENSE("GPL"); |
| 45 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 46 | |
| 47 | /* Static decl */ |
| 48 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 49 | static int netvsc_probe(struct device *device); |
| 50 | static int netvsc_remove(struct device *device); |
| 51 | static int netvsc_open(struct net_device *net); |
| 52 | static void netvsc_xmit_completion(void *context); |
| 53 | static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net); |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 54 | static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_packet *Packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 55 | static int netvsc_close(struct net_device *net); |
| 56 | static struct net_device_stats *netvsc_get_stats(struct net_device *net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 57 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, unsigned int status); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 58 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 59 | |
| 60 | /* Data types */ |
| 61 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 62 | struct net_device_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 63 | struct device_context *device_ctx; /* point back to our device context */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 64 | struct net_device_stats stats; |
| 65 | }; |
| 66 | |
| 67 | struct netvsc_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 68 | /* !! These must be the first 2 fields !! */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 69 | struct driver_context drv_ctx; |
| 70 | NETVSC_DRIVER_OBJECT drv_obj; |
| 71 | }; |
| 72 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 73 | |
| 74 | /* Globals */ |
| 75 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 76 | |
| 77 | static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; |
| 78 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 79 | /* The one and only one */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 80 | static struct netvsc_driver_context g_netvsc_drv; |
| 81 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 82 | |
| 83 | /* Routines */ |
| 84 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 85 | |
| 86 | /*++ |
| 87 | |
| 88 | Name: netvsc_drv_init() |
| 89 | |
| 90 | Desc: NetVsc driver initialization |
| 91 | |
| 92 | --*/ |
| 93 | int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) |
| 94 | { |
| 95 | int ret=0; |
| 96 | NETVSC_DRIVER_OBJECT *net_drv_obj=&g_netvsc_drv.drv_obj; |
| 97 | struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx; |
| 98 | |
| 99 | DPRINT_ENTER(NETVSC_DRV); |
| 100 | |
| 101 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); |
| 102 | |
| 103 | net_drv_obj->RingBufferSize = netvsc_ringbuffer_size; |
| 104 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; |
| 105 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; |
| 106 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 107 | /* Callback to client driver to complete the initialization */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 108 | pfn_drv_init(&net_drv_obj->Base); |
| 109 | |
| 110 | drv_ctx->driver.name = net_drv_obj->Base.name; |
| 111 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, sizeof(GUID)); |
| 112 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 113 | drv_ctx->probe = netvsc_probe; |
| 114 | drv_ctx->remove = netvsc_remove; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 115 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 116 | /* The driver belongs to vmbus */ |
Bill Pemberton | 5d48a1c | 2009-07-27 16:47:36 -0400 | [diff] [blame] | 117 | ret = vmbus_child_driver_register(drv_ctx); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 118 | |
| 119 | DPRINT_EXIT(NETVSC_DRV); |
| 120 | |
| 121 | return ret; |
| 122 | } |
| 123 | |
| 124 | /*++ |
| 125 | |
| 126 | Name: netvsc_get_stats() |
| 127 | |
| 128 | Desc: Get the network stats |
| 129 | |
| 130 | --*/ |
| 131 | static struct net_device_stats *netvsc_get_stats(struct net_device *net) |
| 132 | { |
| 133 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 134 | |
| 135 | return &net_device_ctx->stats; |
| 136 | } |
| 137 | |
| 138 | /*++ |
| 139 | |
| 140 | Name: netvsc_set_multicast_list() |
| 141 | |
| 142 | Desc: Set the multicast list |
| 143 | |
| 144 | Remark: No-op here |
| 145 | --*/ |
Greg Kroah-Hartman | 4e9bfef | 2009-07-15 12:45:20 -0700 | [diff] [blame] | 146 | static void netvsc_set_multicast_list(struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 147 | { |
| 148 | } |
| 149 | |
| 150 | |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 151 | static const struct net_device_ops device_ops = { |
| 152 | .ndo_open = netvsc_open, |
| 153 | .ndo_stop = netvsc_close, |
| 154 | .ndo_start_xmit = netvsc_start_xmit, |
| 155 | .ndo_get_stats = netvsc_get_stats, |
| 156 | .ndo_set_multicast_list = netvsc_set_multicast_list, |
| 157 | }; |
| 158 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 159 | /*++ |
| 160 | |
| 161 | Name: netvsc_probe() |
| 162 | |
| 163 | Desc: Add the specified new device to this driver |
| 164 | |
| 165 | --*/ |
| 166 | static int netvsc_probe(struct device *device) |
| 167 | { |
| 168 | int ret=0; |
| 169 | |
| 170 | struct driver_context *driver_ctx = driver_to_driver_context(device->driver); |
| 171 | struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; |
| 172 | NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj; |
| 173 | |
| 174 | struct device_context *device_ctx = device_to_device_context(device); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 175 | struct hv_device *device_obj = &device_ctx->device_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 176 | |
| 177 | struct net_device *net = NULL; |
| 178 | struct net_device_context *net_device_ctx; |
| 179 | NETVSC_DEVICE_INFO device_info; |
| 180 | |
| 181 | DPRINT_ENTER(NETVSC_DRV); |
| 182 | |
| 183 | if (!net_drv_obj->Base.OnDeviceAdd) |
| 184 | { |
| 185 | return -1; |
| 186 | } |
| 187 | |
| 188 | net = alloc_netdev(sizeof(struct net_device_context), "seth%d", ether_setup); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 189 | /* net = alloc_etherdev(sizeof(struct net_device_context)); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 190 | if (!net) |
| 191 | { |
| 192 | return -1; |
| 193 | } |
| 194 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 195 | /* Set initial state */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 196 | netif_carrier_off(net); |
| 197 | netif_stop_queue(net); |
| 198 | |
| 199 | net_device_ctx = netdev_priv(net); |
| 200 | net_device_ctx->device_ctx = device_ctx; |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 201 | dev_set_drvdata(device, net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 202 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 203 | /* Notify the netvsc driver of the new device */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 204 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info); |
| 205 | if (ret != 0) |
| 206 | { |
| 207 | free_netdev(net); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 208 | dev_set_drvdata(device, NULL); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 209 | |
| 210 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", ret); |
| 211 | return ret; |
| 212 | } |
| 213 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 214 | /* If carrier is still off ie we did not get a link status callback, update it if necessary */ |
| 215 | /* FIXME: We should use a atomic or test/set instead to avoid getting out of sync with the device's link status */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 216 | if (!netif_carrier_ok(net)) |
| 217 | { |
| 218 | if (!device_info.LinkState) |
| 219 | { |
| 220 | netif_carrier_on(net); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); |
| 225 | |
Greg Kroah-Hartman | c86f3e2 | 2009-07-14 10:59:56 -0700 | [diff] [blame] | 226 | net->netdev_ops = &device_ops; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 227 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 228 | SET_NETDEV_DEV(net, device); |
| 229 | |
| 230 | ret = register_netdev(net); |
| 231 | if (ret != 0) |
| 232 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 233 | /* Remove the device and release the resource */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 234 | net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 235 | free_netdev(net); |
| 236 | } |
| 237 | |
| 238 | DPRINT_EXIT(NETVSC_DRV); |
| 239 | |
| 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | static int netvsc_remove(struct device *device) |
| 244 | { |
| 245 | int ret=0; |
| 246 | struct driver_context *driver_ctx = driver_to_driver_context(device->driver); |
| 247 | struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; |
| 248 | NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj; |
| 249 | |
| 250 | struct device_context *device_ctx = device_to_device_context(device); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 251 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 252 | struct hv_device *device_obj = &device_ctx->device_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 253 | |
| 254 | DPRINT_ENTER(NETVSC_DRV); |
| 255 | |
| 256 | if (net == NULL) |
| 257 | { |
| 258 | DPRINT_INFO(NETVSC, "no net device to remove"); |
| 259 | DPRINT_EXIT(NETVSC_DRV); |
| 260 | return 0; |
| 261 | } |
| 262 | |
| 263 | if (!net_drv_obj->Base.OnDeviceRemove) |
| 264 | { |
| 265 | DPRINT_EXIT(NETVSC_DRV); |
| 266 | return -1; |
| 267 | } |
| 268 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 269 | /* Stop outbound asap */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 270 | netif_stop_queue(net); |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 271 | /* netif_carrier_off(net); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 272 | |
| 273 | unregister_netdev(net); |
| 274 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 275 | /* Call to the vsc driver to let it know that the device is being removed */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 276 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 277 | if (ret != 0) |
| 278 | { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 279 | /* TODO: */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 280 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); |
| 281 | } |
| 282 | |
| 283 | free_netdev(net); |
| 284 | |
| 285 | DPRINT_EXIT(NETVSC_DRV); |
| 286 | |
| 287 | return ret; |
| 288 | } |
| 289 | |
| 290 | /*++ |
| 291 | |
| 292 | Name: netvsc_open() |
| 293 | |
| 294 | Desc: Open the specified interface device |
| 295 | |
| 296 | --*/ |
| 297 | static int netvsc_open(struct net_device *net) |
| 298 | { |
| 299 | int ret=0; |
| 300 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 301 | struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 302 | struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; |
| 303 | NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj; |
| 304 | |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 305 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 306 | |
| 307 | DPRINT_ENTER(NETVSC_DRV); |
| 308 | |
| 309 | if (netif_carrier_ok(net)) |
| 310 | { |
| 311 | memset(&net_device_ctx->stats, 0 , sizeof(struct net_device_stats)); |
| 312 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 313 | /* Open up the device */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 314 | ret = net_drv_obj->OnOpen(device_obj); |
| 315 | if (ret != 0) |
| 316 | { |
| 317 | DPRINT_ERR(NETVSC_DRV, "unable to open device (ret %d).", ret); |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | netif_start_queue(net); |
| 322 | } |
| 323 | else |
| 324 | { |
| 325 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
| 326 | } |
| 327 | |
| 328 | DPRINT_EXIT(NETVSC_DRV); |
| 329 | return ret; |
| 330 | } |
| 331 | |
| 332 | /*++ |
| 333 | |
| 334 | Name: netvsc_close() |
| 335 | |
| 336 | Desc: Close the specified interface device |
| 337 | |
| 338 | --*/ |
| 339 | static int netvsc_close(struct net_device *net) |
| 340 | { |
| 341 | int ret=0; |
| 342 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 343 | struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 344 | struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; |
| 345 | NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj; |
| 346 | |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 347 | struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 348 | |
| 349 | DPRINT_ENTER(NETVSC_DRV); |
| 350 | |
| 351 | netif_stop_queue(net); |
| 352 | |
| 353 | ret = net_drv_obj->OnClose(device_obj); |
| 354 | if (ret != 0) |
| 355 | { |
| 356 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
| 357 | } |
| 358 | |
| 359 | DPRINT_EXIT(NETVSC_DRV); |
| 360 | |
| 361 | return ret; |
| 362 | } |
| 363 | |
| 364 | |
| 365 | /*++ |
| 366 | |
| 367 | Name: netvsc_xmit_completion() |
| 368 | |
| 369 | Desc: Send completion processing |
| 370 | |
| 371 | --*/ |
| 372 | static void netvsc_xmit_completion(void *context) |
| 373 | { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 374 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 375 | struct sk_buff *skb = (struct sk_buff *)(unsigned long)packet->Completion.Send.SendCompletionTid; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 376 | struct net_device* net; |
| 377 | |
| 378 | DPRINT_ENTER(NETVSC_DRV); |
| 379 | |
| 380 | kfree(packet); |
| 381 | |
| 382 | if (skb) |
| 383 | { |
| 384 | net = skb->dev; |
| 385 | |
| 386 | dev_kfree_skb_any(skb); |
| 387 | |
| 388 | if (netif_queue_stopped(net)) |
| 389 | { |
| 390 | DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", net); |
| 391 | |
| 392 | netif_wake_queue(net); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | DPRINT_EXIT(NETVSC_DRV); |
| 397 | } |
| 398 | |
| 399 | /*++ |
| 400 | |
| 401 | Name: netvsc_start_xmit() |
| 402 | |
| 403 | Desc: Start a send |
| 404 | |
| 405 | --*/ |
| 406 | static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net) |
| 407 | { |
| 408 | int ret=0; |
| 409 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 410 | struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 411 | struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; |
| 412 | NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj; |
| 413 | |
| 414 | int i=0; |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 415 | struct hv_netvsc_packet *packet; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 416 | int num_frags; |
| 417 | int retries=0; |
| 418 | |
| 419 | DPRINT_ENTER(NETVSC_DRV); |
| 420 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 421 | /* Support only 1 chain of frags */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 422 | ASSERT(skb_shinfo(skb)->frag_list == NULL); |
| 423 | ASSERT(skb->dev == net); |
| 424 | |
| 425 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", skb->len, skb->data_len); |
| 426 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 427 | /* Add 1 for skb->data and any additional ones requested */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 428 | num_frags = skb_shinfo(skb)->nr_frags + 1 + net_drv_obj->AdditionalRequestPageBufferCount; |
| 429 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 430 | /* Allocate a netvsc packet based on # of frags. */ |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 431 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + (num_frags * sizeof(PAGE_BUFFER)) + net_drv_obj->RequestExtSize, GFP_ATOMIC); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 432 | if (!packet) |
| 433 | { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 434 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 435 | return -1; |
| 436 | } |
| 437 | |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 438 | packet->Extension = (void*)(unsigned long)packet + sizeof(struct hv_netvsc_packet) + (num_frags * sizeof(PAGE_BUFFER)) ; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 439 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 440 | /* Setup the rndis header */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 441 | packet->PageBufferCount = num_frags; |
| 442 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 443 | /* TODO: Flush all write buffers/ memory fence ??? */ |
| 444 | /* wmb(); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 445 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 446 | /* Initialize it from the skb */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 447 | ASSERT(skb->data); |
| 448 | packet->TotalDataBufferLength = skb->len; |
| 449 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 450 | /* Start filling in the page buffers starting at AdditionalRequestPageBufferCount offset */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 451 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
| 452 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE -1); |
| 453 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; |
| 454 | |
| 455 | ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); |
| 456 | |
| 457 | for (i=net_drv_obj->AdditionalRequestPageBufferCount+1; i<num_frags; i++) |
| 458 | { |
| 459 | packet->PageBuffers[i].Pfn = page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); |
| 460 | packet->PageBuffers[i].Offset = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; |
| 461 | packet->PageBuffers[i].Length = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; |
| 462 | } |
| 463 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 464 | /* Set the completion routine */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 465 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
| 466 | packet->Completion.Send.SendCompletionContext = packet; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 467 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 468 | |
| 469 | retry_send: |
| 470 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, packet); |
| 471 | |
| 472 | if (ret == 0) |
| 473 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 474 | ret = NETDEV_TX_OK; |
| 475 | net_device_ctx->stats.tx_bytes += skb->len; |
| 476 | net_device_ctx->stats.tx_packets++; |
| 477 | } |
| 478 | else |
| 479 | { |
| 480 | retries++; |
| 481 | if (retries < 4) |
| 482 | { |
| 483 | DPRINT_ERR(NETVSC_DRV, "unable to send...retrying %d...", retries); |
| 484 | udelay(100); |
| 485 | goto retry_send; |
| 486 | } |
| 487 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 488 | /* no more room or we are shutting down */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 489 | DPRINT_ERR(NETVSC_DRV, "unable to send (%d)...marking net device (%p) busy", ret, net); |
| 490 | DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); |
| 491 | |
| 492 | ret = NETDEV_TX_BUSY; |
| 493 | net_device_ctx->stats.tx_dropped++; |
| 494 | |
| 495 | netif_stop_queue(net); |
| 496 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 497 | /* Null it since the caller will free it instead of the completion routine */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 498 | packet->Completion.Send.SendCompletionTid = 0; |
| 499 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 500 | /* Release the resources since we will not get any send completion */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 501 | netvsc_xmit_completion((void*)packet); |
| 502 | } |
| 503 | |
| 504 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", net_device_ctx->stats.tx_packets, net_device_ctx->stats.tx_bytes); |
| 505 | |
| 506 | DPRINT_EXIT(NETVSC_DRV); |
| 507 | return ret; |
| 508 | } |
| 509 | |
| 510 | |
| 511 | /*++ |
| 512 | |
| 513 | Name: netvsc_linkstatus_callback() |
| 514 | |
| 515 | Desc: Link up/down notification |
| 516 | |
| 517 | --*/ |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 518 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, unsigned int status) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 519 | { |
| 520 | struct device_context* device_ctx = to_device_context(device_obj); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 521 | struct net_device* net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 522 | |
| 523 | DPRINT_ENTER(NETVSC_DRV); |
| 524 | |
| 525 | if (!net) |
| 526 | { |
| 527 | DPRINT_ERR(NETVSC_DRV, "got link status but net device not initialized yet"); |
| 528 | return; |
| 529 | } |
| 530 | |
| 531 | if (status == 1) |
| 532 | { |
| 533 | netif_carrier_on(net); |
| 534 | netif_wake_queue(net); |
| 535 | } |
| 536 | else |
| 537 | { |
| 538 | netif_carrier_off(net); |
| 539 | netif_stop_queue(net); |
| 540 | } |
| 541 | DPRINT_EXIT(NETVSC_DRV); |
| 542 | } |
| 543 | |
| 544 | |
| 545 | /*++ |
| 546 | |
| 547 | Name: netvsc_recv_callback() |
| 548 | |
| 549 | Desc: Callback when we receive a packet from the "wire" on the specify device |
| 550 | |
| 551 | --*/ |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 552 | static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_packet *packet) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 553 | { |
| 554 | int ret=0; |
| 555 | struct device_context *device_ctx = to_device_context(device_obj); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 556 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 557 | struct net_device_context *net_device_ctx; |
| 558 | |
| 559 | struct sk_buff *skb; |
| 560 | void *data; |
| 561 | int i=0; |
| 562 | unsigned long flags; |
| 563 | |
| 564 | DPRINT_ENTER(NETVSC_DRV); |
| 565 | |
| 566 | if (!net) |
| 567 | { |
| 568 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device not initialized yet"); |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | net_device_ctx = netdev_priv(net); |
| 573 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 574 | /* Allocate a skb - TODO preallocate this */ |
| 575 | /* skb = alloc_skb(packet->TotalDataBufferLength, GFP_ATOMIC); */ |
| 576 | skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); /* Pad 2-bytes to align IP header to 16 bytes */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 577 | ASSERT(skb); |
| 578 | skb_reserve(skb, 2); |
| 579 | skb->dev = net; |
| 580 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 581 | /* for kmap_atomic */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 582 | local_irq_save(flags); |
| 583 | |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame^] | 584 | /* Copy to skb. This copy is needed here since the memory pointed by hv_netvsc_packet */ |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 585 | /* cannot be deallocated */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 586 | for (i=0; i<packet->PageBufferCount; i++) |
| 587 | { |
| 588 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), KM_IRQ1); |
| 589 | data = (void*)(unsigned long)data + packet->PageBuffers[i].Offset; |
| 590 | |
| 591 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, packet->PageBuffers[i].Length); |
| 592 | |
| 593 | kunmap_atomic((void*)((unsigned long)data - packet->PageBuffers[i].Offset), KM_IRQ1); |
| 594 | } |
| 595 | |
| 596 | local_irq_restore(flags); |
| 597 | |
| 598 | skb->protocol = eth_type_trans(skb, net); |
| 599 | |
| 600 | skb->ip_summed = CHECKSUM_NONE; |
| 601 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 602 | /* Pass the skb back up. Network stack will deallocate the skb when it is done */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 603 | ret = netif_rx(skb); |
| 604 | |
| 605 | switch (ret) |
| 606 | { |
| 607 | case NET_RX_DROP: |
| 608 | net_device_ctx->stats.rx_dropped++; |
| 609 | break; |
| 610 | default: |
| 611 | net_device_ctx->stats.rx_packets++; |
| 612 | net_device_ctx->stats.rx_bytes += skb->len; |
| 613 | break; |
| 614 | |
| 615 | } |
| 616 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", net_device_ctx->stats.rx_packets, net_device_ctx->stats.rx_bytes); |
| 617 | |
| 618 | DPRINT_EXIT(NETVSC_DRV); |
| 619 | |
| 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
| 624 | { |
| 625 | struct device **curr = (struct device **)data; |
| 626 | *curr = dev; |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 627 | return 1; /* stop iterating */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | /*++ |
| 631 | |
| 632 | Name: netvsc_drv_exit() |
| 633 | |
| 634 | Desc: |
| 635 | |
| 636 | --*/ |
| 637 | void netvsc_drv_exit(void) |
| 638 | { |
| 639 | NETVSC_DRIVER_OBJECT *netvsc_drv_obj=&g_netvsc_drv.drv_obj; |
| 640 | struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 641 | struct device *current_dev=NULL; |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 642 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 643 | |
| 644 | DPRINT_ENTER(NETVSC_DRV); |
| 645 | |
| 646 | while (1) |
| 647 | { |
| 648 | current_dev = NULL; |
| 649 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 650 | /* Get the device */ |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 651 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
| 652 | (void *) ¤t_dev, |
| 653 | netvsc_drv_exit_cb); |
| 654 | |
| 655 | if (ret) |
| 656 | DPRINT_WARN(NETVSC_DRV, |
| 657 | "driver_for_each_device returned %d", ret); |
| 658 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 659 | |
| 660 | if (current_dev == NULL) |
| 661 | break; |
| 662 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 663 | /* Initiate removal from the top-down */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 664 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", current_dev); |
| 665 | |
| 666 | device_unregister(current_dev); |
| 667 | } |
| 668 | |
| 669 | if (netvsc_drv_obj->Base.OnCleanup) |
| 670 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); |
| 671 | |
| 672 | vmbus_child_driver_unregister(drv_ctx); |
| 673 | |
| 674 | DPRINT_EXIT(NETVSC_DRV); |
| 675 | |
| 676 | return; |
| 677 | } |
| 678 | |
| 679 | static int __init netvsc_init(void) |
| 680 | { |
| 681 | int ret; |
| 682 | |
| 683 | DPRINT_ENTER(NETVSC_DRV); |
| 684 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); |
| 685 | |
| 686 | ret = netvsc_drv_init(NetVscInitialize); |
| 687 | |
| 688 | DPRINT_EXIT(NETVSC_DRV); |
| 689 | |
| 690 | return ret; |
| 691 | } |
| 692 | |
| 693 | static void __exit netvsc_exit(void) |
| 694 | { |
| 695 | DPRINT_ENTER(NETVSC_DRV); |
| 696 | |
| 697 | netvsc_drv_exit(); |
| 698 | |
| 699 | DPRINT_EXIT(NETVSC_DRV); |
| 700 | } |
| 701 | |
| 702 | module_param(netvsc_ringbuffer_size, int, S_IRUGO); |
| 703 | |
| 704 | module_init(netvsc_init); |
| 705 | module_exit(netvsc_exit); |