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: |
Haiyang Zhang | d0e94d1 | 2009-11-23 17:00:22 +0000 | [diff] [blame] | 18 | * Haiyang Zhang <haiyangz@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 19 | * Hank Janssen <hjanssen@microsoft.com> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 20 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 21 | #include <linux/init.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/highmem.h> |
| 24 | #include <linux/device.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 25 | #include <linux/io.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 26 | #include <linux/delay.h> |
| 27 | #include <linux/netdevice.h> |
| 28 | #include <linux/inetdevice.h> |
| 29 | #include <linux/etherdevice.h> |
| 30 | #include <linux/skbuff.h> |
| 31 | #include <linux/in.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 32 | #include <linux/slab.h> |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 33 | #include <net/arp.h> |
| 34 | #include <net/route.h> |
| 35 | #include <net/sock.h> |
| 36 | #include <net/pkt_sched.h> |
Greg Kroah-Hartman | 4983b39 | 2009-08-19 16:14:47 -0700 | [diff] [blame] | 37 | #include "osd.h" |
Greg Kroah-Hartman | 645954c | 2009-08-28 16:22:59 -0700 | [diff] [blame] | 38 | #include "logging.h" |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 39 | #include "VersionInfo.h" |
Greg Kroah-Hartman | 870cde8 | 2009-08-19 16:21:28 -0700 | [diff] [blame] | 40 | #include "vmbus.h" |
Greg Kroah-Hartman | cc21181 | 2009-08-28 16:23:17 -0700 | [diff] [blame] | 41 | #include "NetVscApi.h" |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 42 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 43 | struct net_device_context { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 44 | /* point back to our device context */ |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 45 | struct vm_device *device_ctx; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 46 | struct net_device_stats stats; |
| 47 | }; |
| 48 | |
| 49 | struct netvsc_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 50 | /* !! These must be the first 2 fields !! */ |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 51 | /* Which is a bug FIXME! */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 52 | struct driver_context drv_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 53 | struct netvsc_driver drv_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 56 | static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; |
| 57 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 58 | /* The one and only one */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 59 | static struct netvsc_driver_context g_netvsc_drv; |
| 60 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 61 | static struct net_device_stats *netvsc_get_stats(struct net_device *net) |
| 62 | { |
| 63 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 64 | |
| 65 | return &net_device_ctx->stats; |
| 66 | } |
| 67 | |
Greg Kroah-Hartman | 4e9bfef | 2009-07-15 12:45:20 -0700 | [diff] [blame] | 68 | static void netvsc_set_multicast_list(struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 69 | { |
| 70 | } |
| 71 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 72 | static int netvsc_open(struct net_device *net) |
| 73 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 74 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 75 | 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] | 76 | int ret = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 77 | |
| 78 | DPRINT_ENTER(NETVSC_DRV); |
| 79 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 80 | if (netif_carrier_ok(net)) { |
| 81 | memset(&net_device_ctx->stats, 0, |
| 82 | sizeof(struct net_device_stats)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 83 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 84 | /* Open up the device */ |
Greg Kroah-Hartman | 2d07534 | 2010-01-08 10:24:42 -0800 | [diff] [blame] | 85 | ret = RndisFilterOnOpen(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 86 | if (ret != 0) { |
| 87 | DPRINT_ERR(NETVSC_DRV, |
| 88 | "unable to open device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 89 | return ret; |
| 90 | } |
| 91 | |
| 92 | netif_start_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 93 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 94 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
| 95 | } |
| 96 | |
| 97 | DPRINT_EXIT(NETVSC_DRV); |
| 98 | return ret; |
| 99 | } |
| 100 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 101 | static int netvsc_close(struct net_device *net) |
| 102 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 103 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 104 | 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] | 105 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 106 | |
| 107 | DPRINT_ENTER(NETVSC_DRV); |
| 108 | |
| 109 | netif_stop_queue(net); |
| 110 | |
Greg Kroah-Hartman | 4f28900 | 2010-01-08 10:25:01 -0800 | [diff] [blame] | 111 | ret = RndisFilterOnClose(device_obj); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 112 | if (ret != 0) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 113 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 114 | |
| 115 | DPRINT_EXIT(NETVSC_DRV); |
| 116 | |
| 117 | return ret; |
| 118 | } |
| 119 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 120 | static void netvsc_xmit_completion(void *context) |
| 121 | { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 122 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 123 | struct sk_buff *skb = (struct sk_buff *) |
| 124 | (unsigned long)packet->Completion.Send.SendCompletionTid; |
| 125 | struct net_device *net; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 126 | |
| 127 | DPRINT_ENTER(NETVSC_DRV); |
| 128 | |
| 129 | kfree(packet); |
| 130 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 131 | if (skb) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 132 | net = skb->dev; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 133 | dev_kfree_skb_any(skb); |
| 134 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 135 | if (netif_queue_stopped(net)) { |
| 136 | DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", |
| 137 | net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 138 | |
| 139 | netif_wake_queue(net); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | DPRINT_EXIT(NETVSC_DRV); |
| 144 | } |
| 145 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 146 | 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] | 147 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 148 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 149 | struct driver_context *driver_ctx = |
| 150 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 151 | struct netvsc_driver_context *net_drv_ctx = |
| 152 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 153 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 154 | struct hv_netvsc_packet *packet; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 155 | int i; |
| 156 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 157 | int num_frags; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 158 | int retries = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 159 | |
| 160 | DPRINT_ENTER(NETVSC_DRV); |
| 161 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 162 | /* Support only 1 chain of frags */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 163 | ASSERT(skb_shinfo(skb)->frag_list == NULL); |
| 164 | ASSERT(skb->dev == net); |
| 165 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 166 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", |
| 167 | skb->len, skb->data_len); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 168 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 169 | /* Add 1 for skb->data and any additional ones requested */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 170 | num_frags = skb_shinfo(skb)->nr_frags + 1 + |
| 171 | net_drv_obj->AdditionalRequestPageBufferCount; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 172 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 173 | /* Allocate a netvsc packet based on # of frags. */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 174 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
| 175 | (num_frags * sizeof(struct hv_page_buffer)) + |
| 176 | net_drv_obj->RequestExtSize, GFP_ATOMIC); |
| 177 | if (!packet) { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 178 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 179 | return -1; |
| 180 | } |
| 181 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 182 | packet->Extension = (void *)(unsigned long)packet + |
| 183 | sizeof(struct hv_netvsc_packet) + |
| 184 | (num_frags * sizeof(struct hv_page_buffer)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 185 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 186 | /* Setup the rndis header */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 187 | packet->PageBufferCount = num_frags; |
| 188 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 189 | /* TODO: Flush all write buffers/ memory fence ??? */ |
| 190 | /* wmb(); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 191 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 192 | /* Initialize it from the skb */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 193 | ASSERT(skb->data); |
| 194 | packet->TotalDataBufferLength = skb->len; |
| 195 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 196 | /* |
| 197 | * Start filling in the page buffers starting at |
| 198 | * AdditionalRequestPageBufferCount offset |
| 199 | */ |
| 200 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
| 201 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1); |
| 202 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 203 | |
| 204 | ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); |
| 205 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 206 | for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1; |
| 207 | i < num_frags; i++) { |
| 208 | packet->PageBuffers[i].Pfn = |
| 209 | page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); |
| 210 | packet->PageBuffers[i].Offset = |
| 211 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; |
| 212 | packet->PageBuffers[i].Length = |
| 213 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 216 | /* Set the completion routine */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 217 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
| 218 | packet->Completion.Send.SendCompletionContext = packet; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 219 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 220 | |
| 221 | retry_send: |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 222 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, |
| 223 | packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 224 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 225 | if (ret == 0) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 226 | ret = NETDEV_TX_OK; |
| 227 | net_device_ctx->stats.tx_bytes += skb->len; |
| 228 | net_device_ctx->stats.tx_packets++; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 229 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 230 | retries++; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 231 | if (retries < 4) { |
| 232 | DPRINT_ERR(NETVSC_DRV, "unable to send..." |
| 233 | "retrying %d...", retries); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 234 | udelay(100); |
| 235 | goto retry_send; |
| 236 | } |
| 237 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 238 | /* no more room or we are shutting down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 239 | DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..." |
| 240 | "marking net device (%p) busy", ret, net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 241 | DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); |
| 242 | |
| 243 | ret = NETDEV_TX_BUSY; |
| 244 | net_device_ctx->stats.tx_dropped++; |
| 245 | |
| 246 | netif_stop_queue(net); |
| 247 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 248 | /* |
| 249 | * Null it since the caller will free it instead of the |
| 250 | * completion routine |
| 251 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 252 | packet->Completion.Send.SendCompletionTid = 0; |
| 253 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 254 | /* |
| 255 | * Release the resources since we will not get any send |
| 256 | * completion |
| 257 | */ |
| 258 | netvsc_xmit_completion((void *)packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 259 | } |
| 260 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 261 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", |
| 262 | net_device_ctx->stats.tx_packets, |
| 263 | net_device_ctx->stats.tx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 264 | |
| 265 | DPRINT_EXIT(NETVSC_DRV); |
| 266 | return ret; |
| 267 | } |
| 268 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 269 | /** |
| 270 | * netvsc_linkstatus_callback - Link up/down notification |
| 271 | */ |
| 272 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, |
| 273 | unsigned int status) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 274 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 275 | struct vm_device *device_ctx = to_vm_device(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 276 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 277 | |
| 278 | DPRINT_ENTER(NETVSC_DRV); |
| 279 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 280 | if (!net) { |
| 281 | DPRINT_ERR(NETVSC_DRV, "got link status but net device " |
| 282 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 283 | return; |
| 284 | } |
| 285 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 286 | if (status == 1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 287 | netif_carrier_on(net); |
| 288 | netif_wake_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 289 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 290 | netif_carrier_off(net); |
| 291 | netif_stop_queue(net); |
| 292 | } |
| 293 | DPRINT_EXIT(NETVSC_DRV); |
| 294 | } |
| 295 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 296 | /** |
| 297 | * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device. |
| 298 | */ |
| 299 | static int netvsc_recv_callback(struct hv_device *device_obj, |
| 300 | struct hv_netvsc_packet *packet) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 301 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 302 | struct vm_device *device_ctx = to_vm_device(device_obj); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 303 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 304 | struct net_device_context *net_device_ctx; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 305 | struct sk_buff *skb; |
| 306 | void *data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 307 | int ret; |
| 308 | int i; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 309 | unsigned long flags; |
| 310 | |
| 311 | DPRINT_ENTER(NETVSC_DRV); |
| 312 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 313 | if (!net) { |
| 314 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " |
| 315 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | net_device_ctx = netdev_priv(net); |
| 320 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 321 | /* Allocate a skb - TODO preallocate this */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 322 | /* Pad 2-bytes to align IP header to 16 bytes */ |
| 323 | skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 324 | ASSERT(skb); |
| 325 | skb_reserve(skb, 2); |
| 326 | skb->dev = net; |
| 327 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 328 | /* for kmap_atomic */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 329 | local_irq_save(flags); |
| 330 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 331 | /* |
| 332 | * Copy to skb. This copy is needed here since the memory pointed by |
| 333 | * hv_netvsc_packet cannot be deallocated |
| 334 | */ |
| 335 | for (i = 0; i < packet->PageBufferCount; i++) { |
| 336 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), |
| 337 | KM_IRQ1); |
| 338 | data = (void *)(unsigned long)data + |
| 339 | packet->PageBuffers[i].Offset; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 340 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 341 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, |
| 342 | packet->PageBuffers[i].Length); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 343 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 344 | kunmap_atomic((void *)((unsigned long)data - |
| 345 | packet->PageBuffers[i].Offset), KM_IRQ1); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | local_irq_restore(flags); |
| 349 | |
| 350 | skb->protocol = eth_type_trans(skb, net); |
| 351 | |
| 352 | skb->ip_summed = CHECKSUM_NONE; |
| 353 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 354 | /* |
| 355 | * Pass the skb back up. Network stack will deallocate the skb when it |
| 356 | * is done |
| 357 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 358 | ret = netif_rx(skb); |
| 359 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 360 | switch (ret) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 361 | case NET_RX_DROP: |
| 362 | net_device_ctx->stats.rx_dropped++; |
| 363 | break; |
| 364 | default: |
| 365 | net_device_ctx->stats.rx_packets++; |
| 366 | net_device_ctx->stats.rx_bytes += skb->len; |
| 367 | break; |
| 368 | |
| 369 | } |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 370 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", |
| 371 | net_device_ctx->stats.rx_packets, |
| 372 | net_device_ctx->stats.rx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 373 | |
| 374 | DPRINT_EXIT(NETVSC_DRV); |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 379 | static const struct net_device_ops device_ops = { |
| 380 | .ndo_open = netvsc_open, |
| 381 | .ndo_stop = netvsc_close, |
| 382 | .ndo_start_xmit = netvsc_start_xmit, |
| 383 | .ndo_get_stats = netvsc_get_stats, |
| 384 | .ndo_set_multicast_list = netvsc_set_multicast_list, |
| 385 | }; |
| 386 | |
| 387 | static int netvsc_probe(struct device *device) |
| 388 | { |
| 389 | struct driver_context *driver_ctx = |
| 390 | driver_to_driver_context(device->driver); |
| 391 | struct netvsc_driver_context *net_drv_ctx = |
| 392 | (struct netvsc_driver_context *)driver_ctx; |
| 393 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 394 | struct vm_device *device_ctx = device_to_vm_device(device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 395 | struct hv_device *device_obj = &device_ctx->device_obj; |
| 396 | struct net_device *net = NULL; |
| 397 | struct net_device_context *net_device_ctx; |
| 398 | struct netvsc_device_info device_info; |
| 399 | int ret; |
| 400 | |
| 401 | DPRINT_ENTER(NETVSC_DRV); |
| 402 | |
| 403 | if (!net_drv_obj->Base.OnDeviceAdd) |
| 404 | return -1; |
| 405 | |
Stephen Hemminger | 546d9e1 | 2010-03-11 09:11:37 -0800 | [diff] [blame^] | 406 | net = alloc_etherdev(sizeof(struct net_device_context)); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 407 | if (!net) |
| 408 | return -1; |
| 409 | |
| 410 | /* Set initial state */ |
| 411 | netif_carrier_off(net); |
| 412 | netif_stop_queue(net); |
| 413 | |
| 414 | net_device_ctx = netdev_priv(net); |
| 415 | net_device_ctx->device_ctx = device_ctx; |
| 416 | dev_set_drvdata(device, net); |
| 417 | |
| 418 | /* Notify the netvsc driver of the new device */ |
| 419 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); |
| 420 | if (ret != 0) { |
| 421 | free_netdev(net); |
| 422 | dev_set_drvdata(device, NULL); |
| 423 | |
| 424 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", |
| 425 | ret); |
| 426 | return ret; |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * If carrier is still off ie we did not get a link status callback, |
| 431 | * update it if necessary |
| 432 | */ |
| 433 | /* |
| 434 | * FIXME: We should use a atomic or test/set instead to avoid getting |
| 435 | * out of sync with the device's link status |
| 436 | */ |
| 437 | if (!netif_carrier_ok(net)) |
| 438 | if (!device_info.LinkState) |
| 439 | netif_carrier_on(net); |
| 440 | |
| 441 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); |
| 442 | |
| 443 | net->netdev_ops = &device_ops; |
| 444 | |
| 445 | SET_NETDEV_DEV(net, device); |
| 446 | |
| 447 | ret = register_netdev(net); |
| 448 | if (ret != 0) { |
| 449 | /* Remove the device and release the resource */ |
| 450 | net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 451 | free_netdev(net); |
| 452 | } |
| 453 | |
| 454 | DPRINT_EXIT(NETVSC_DRV); |
| 455 | return ret; |
| 456 | } |
| 457 | |
| 458 | static int netvsc_remove(struct device *device) |
| 459 | { |
| 460 | struct driver_context *driver_ctx = |
| 461 | driver_to_driver_context(device->driver); |
| 462 | struct netvsc_driver_context *net_drv_ctx = |
| 463 | (struct netvsc_driver_context *)driver_ctx; |
| 464 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 465 | struct vm_device *device_ctx = device_to_vm_device(device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 466 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
| 467 | struct hv_device *device_obj = &device_ctx->device_obj; |
| 468 | int ret; |
| 469 | |
| 470 | DPRINT_ENTER(NETVSC_DRV); |
| 471 | |
| 472 | if (net == NULL) { |
| 473 | DPRINT_INFO(NETVSC, "no net device to remove"); |
| 474 | DPRINT_EXIT(NETVSC_DRV); |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | if (!net_drv_obj->Base.OnDeviceRemove) { |
| 479 | DPRINT_EXIT(NETVSC_DRV); |
| 480 | return -1; |
| 481 | } |
| 482 | |
| 483 | /* Stop outbound asap */ |
| 484 | netif_stop_queue(net); |
| 485 | /* netif_carrier_off(net); */ |
| 486 | |
| 487 | unregister_netdev(net); |
| 488 | |
| 489 | /* |
| 490 | * Call to the vsc driver to let it know that the device is being |
| 491 | * removed |
| 492 | */ |
| 493 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 494 | if (ret != 0) { |
| 495 | /* TODO: */ |
| 496 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); |
| 497 | } |
| 498 | |
| 499 | free_netdev(net); |
| 500 | DPRINT_EXIT(NETVSC_DRV); |
| 501 | return ret; |
| 502 | } |
| 503 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 504 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
| 505 | { |
| 506 | struct device **curr = (struct device **)data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 507 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 508 | *curr = dev; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 509 | /* stop iterating */ |
| 510 | return 1; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 511 | } |
| 512 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 513 | static void netvsc_drv_exit(void) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 514 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 515 | struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; |
| 516 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 517 | struct device *current_dev; |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 518 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 519 | |
| 520 | DPRINT_ENTER(NETVSC_DRV); |
| 521 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 522 | while (1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 523 | current_dev = NULL; |
| 524 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 525 | /* Get the device */ |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 526 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 527 | ¤t_dev, netvsc_drv_exit_cb); |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 528 | if (ret) |
| 529 | DPRINT_WARN(NETVSC_DRV, |
| 530 | "driver_for_each_device returned %d", ret); |
| 531 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 532 | if (current_dev == NULL) |
| 533 | break; |
| 534 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 535 | /* Initiate removal from the top-down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 536 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", |
| 537 | current_dev); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 538 | |
| 539 | device_unregister(current_dev); |
| 540 | } |
| 541 | |
| 542 | if (netvsc_drv_obj->Base.OnCleanup) |
| 543 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); |
| 544 | |
| 545 | vmbus_child_driver_unregister(drv_ctx); |
| 546 | |
| 547 | DPRINT_EXIT(NETVSC_DRV); |
| 548 | |
| 549 | return; |
| 550 | } |
| 551 | |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 552 | static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv)) |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 553 | { |
| 554 | struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; |
| 555 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 556 | int ret; |
| 557 | |
| 558 | DPRINT_ENTER(NETVSC_DRV); |
| 559 | |
| 560 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); |
| 561 | |
| 562 | net_drv_obj->RingBufferSize = netvsc_ringbuffer_size; |
| 563 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; |
| 564 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; |
| 565 | |
| 566 | /* Callback to client driver to complete the initialization */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 567 | drv_init(&net_drv_obj->Base); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 568 | |
| 569 | drv_ctx->driver.name = net_drv_obj->Base.name; |
| 570 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, |
| 571 | sizeof(struct hv_guid)); |
| 572 | |
| 573 | drv_ctx->probe = netvsc_probe; |
| 574 | drv_ctx->remove = netvsc_remove; |
| 575 | |
| 576 | /* The driver belongs to vmbus */ |
| 577 | ret = vmbus_child_driver_register(drv_ctx); |
| 578 | |
| 579 | DPRINT_EXIT(NETVSC_DRV); |
| 580 | |
| 581 | return ret; |
| 582 | } |
| 583 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 584 | static int __init netvsc_init(void) |
| 585 | { |
| 586 | int ret; |
| 587 | |
| 588 | DPRINT_ENTER(NETVSC_DRV); |
| 589 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); |
| 590 | |
| 591 | ret = netvsc_drv_init(NetVscInitialize); |
| 592 | |
| 593 | DPRINT_EXIT(NETVSC_DRV); |
| 594 | |
| 595 | return ret; |
| 596 | } |
| 597 | |
| 598 | static void __exit netvsc_exit(void) |
| 599 | { |
| 600 | DPRINT_ENTER(NETVSC_DRV); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 601 | netvsc_drv_exit(); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 602 | DPRINT_EXIT(NETVSC_DRV); |
| 603 | } |
| 604 | |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 605 | MODULE_LICENSE("GPL"); |
| 606 | MODULE_VERSION(HV_DRV_VERSION); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 607 | module_param(netvsc_ringbuffer_size, int, S_IRUGO); |
| 608 | |
| 609 | module_init(netvsc_init); |
| 610 | module_exit(netvsc_exit); |