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 | cc211812 | 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 | }; |
| 47 | |
| 48 | struct netvsc_driver_context { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 49 | /* !! These must be the first 2 fields !! */ |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 50 | /* Which is a bug FIXME! */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 51 | struct driver_context drv_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 52 | struct netvsc_driver drv_obj; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 53 | }; |
| 54 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 55 | static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; |
| 56 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 57 | /* The one and only one */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 58 | static struct netvsc_driver_context g_netvsc_drv; |
| 59 | |
Greg Kroah-Hartman | 4e9bfef | 2009-07-15 12:45:20 -0700 | [diff] [blame] | 60 | static void netvsc_set_multicast_list(struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 61 | { |
| 62 | } |
| 63 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 64 | static int netvsc_open(struct net_device *net) |
| 65 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 66 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 67 | 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] | 68 | int ret = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 69 | |
| 70 | DPRINT_ENTER(NETVSC_DRV); |
| 71 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 72 | if (netif_carrier_ok(net)) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 73 | /* Open up the device */ |
Greg Kroah-Hartman | 2d07534 | 2010-01-08 10:24:42 -0800 | [diff] [blame] | 74 | ret = RndisFilterOnOpen(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 75 | if (ret != 0) { |
| 76 | DPRINT_ERR(NETVSC_DRV, |
| 77 | "unable to open device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 78 | return ret; |
| 79 | } |
| 80 | |
| 81 | netif_start_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 82 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 83 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
| 84 | } |
| 85 | |
| 86 | DPRINT_EXIT(NETVSC_DRV); |
| 87 | return ret; |
| 88 | } |
| 89 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 90 | static int netvsc_close(struct net_device *net) |
| 91 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 92 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 93 | 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] | 94 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 95 | |
| 96 | DPRINT_ENTER(NETVSC_DRV); |
| 97 | |
| 98 | netif_stop_queue(net); |
| 99 | |
Greg Kroah-Hartman | 4f28900 | 2010-01-08 10:25:01 -0800 | [diff] [blame] | 100 | ret = RndisFilterOnClose(device_obj); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 101 | if (ret != 0) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 102 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 103 | |
| 104 | DPRINT_EXIT(NETVSC_DRV); |
| 105 | |
| 106 | return ret; |
| 107 | } |
| 108 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 109 | static void netvsc_xmit_completion(void *context) |
| 110 | { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 111 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 112 | struct sk_buff *skb = (struct sk_buff *) |
| 113 | (unsigned long)packet->Completion.Send.SendCompletionTid; |
| 114 | struct net_device *net; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 115 | |
| 116 | DPRINT_ENTER(NETVSC_DRV); |
| 117 | |
| 118 | kfree(packet); |
| 119 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 120 | if (skb) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 121 | net = skb->dev; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 122 | dev_kfree_skb_any(skb); |
| 123 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 124 | if (netif_queue_stopped(net)) { |
| 125 | DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", |
| 126 | net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 127 | |
| 128 | netif_wake_queue(net); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | DPRINT_EXIT(NETVSC_DRV); |
| 133 | } |
| 134 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 135 | 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] | 136 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 137 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 138 | struct driver_context *driver_ctx = |
| 139 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 140 | struct netvsc_driver_context *net_drv_ctx = |
| 141 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 142 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 143 | struct hv_netvsc_packet *packet; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 144 | int i; |
| 145 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 146 | int num_frags; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 147 | int retries = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 148 | |
| 149 | DPRINT_ENTER(NETVSC_DRV); |
| 150 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 151 | /* Support only 1 chain of frags */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 152 | ASSERT(skb_shinfo(skb)->frag_list == NULL); |
| 153 | ASSERT(skb->dev == net); |
| 154 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 155 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", |
| 156 | skb->len, skb->data_len); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 157 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 158 | /* Add 1 for skb->data and any additional ones requested */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 159 | num_frags = skb_shinfo(skb)->nr_frags + 1 + |
| 160 | net_drv_obj->AdditionalRequestPageBufferCount; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 161 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 162 | /* Allocate a netvsc packet based on # of frags. */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 163 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + |
| 164 | (num_frags * sizeof(struct hv_page_buffer)) + |
| 165 | net_drv_obj->RequestExtSize, GFP_ATOMIC); |
| 166 | if (!packet) { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 167 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 168 | return -1; |
| 169 | } |
| 170 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 171 | packet->Extension = (void *)(unsigned long)packet + |
| 172 | sizeof(struct hv_netvsc_packet) + |
| 173 | (num_frags * sizeof(struct hv_page_buffer)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 174 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 175 | /* Setup the rndis header */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 176 | packet->PageBufferCount = num_frags; |
| 177 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 178 | /* TODO: Flush all write buffers/ memory fence ??? */ |
| 179 | /* wmb(); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 180 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 181 | /* Initialize it from the skb */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 182 | ASSERT(skb->data); |
| 183 | packet->TotalDataBufferLength = skb->len; |
| 184 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 185 | /* |
| 186 | * Start filling in the page buffers starting at |
| 187 | * AdditionalRequestPageBufferCount offset |
| 188 | */ |
| 189 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
| 190 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1); |
| 191 | packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 192 | |
| 193 | ASSERT((skb->len - skb->data_len) <= PAGE_SIZE); |
| 194 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 195 | for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1; |
| 196 | i < num_frags; i++) { |
| 197 | packet->PageBuffers[i].Pfn = |
| 198 | page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page); |
| 199 | packet->PageBuffers[i].Offset = |
| 200 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; |
| 201 | packet->PageBuffers[i].Length = |
| 202 | skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 205 | /* Set the completion routine */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 206 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
| 207 | packet->Completion.Send.SendCompletionContext = packet; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 208 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 209 | |
| 210 | retry_send: |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 211 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, |
| 212 | packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 213 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 214 | if (ret == 0) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 215 | ret = NETDEV_TX_OK; |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame^] | 216 | net->stats.tx_bytes += skb->len; |
| 217 | net->stats.tx_packets++; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 218 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 219 | retries++; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 220 | if (retries < 4) { |
| 221 | DPRINT_ERR(NETVSC_DRV, "unable to send..." |
| 222 | "retrying %d...", retries); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 223 | udelay(100); |
| 224 | goto retry_send; |
| 225 | } |
| 226 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 227 | /* no more room or we are shutting down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 228 | DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..." |
| 229 | "marking net device (%p) busy", ret, net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 230 | DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); |
| 231 | |
| 232 | ret = NETDEV_TX_BUSY; |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame^] | 233 | net->stats.tx_dropped++; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 234 | |
| 235 | netif_stop_queue(net); |
| 236 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 237 | /* |
| 238 | * Null it since the caller will free it instead of the |
| 239 | * completion routine |
| 240 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 241 | packet->Completion.Send.SendCompletionTid = 0; |
| 242 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 243 | /* |
| 244 | * Release the resources since we will not get any send |
| 245 | * completion |
| 246 | */ |
| 247 | netvsc_xmit_completion((void *)packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 248 | } |
| 249 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 250 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame^] | 251 | net->stats.tx_packets, |
| 252 | net->stats.tx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 253 | |
| 254 | DPRINT_EXIT(NETVSC_DRV); |
| 255 | return ret; |
| 256 | } |
| 257 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 258 | /* |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 259 | * netvsc_linkstatus_callback - Link up/down notification |
| 260 | */ |
| 261 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, |
| 262 | unsigned int status) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 263 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 264 | struct vm_device *device_ctx = to_vm_device(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 265 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 266 | |
| 267 | DPRINT_ENTER(NETVSC_DRV); |
| 268 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 269 | if (!net) { |
| 270 | DPRINT_ERR(NETVSC_DRV, "got link status but net device " |
| 271 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 272 | return; |
| 273 | } |
| 274 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 275 | if (status == 1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 276 | netif_carrier_on(net); |
| 277 | netif_wake_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 278 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 279 | netif_carrier_off(net); |
| 280 | netif_stop_queue(net); |
| 281 | } |
| 282 | DPRINT_EXIT(NETVSC_DRV); |
| 283 | } |
| 284 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 285 | /* |
| 286 | * netvsc_recv_callback - Callback when we receive a packet from the |
| 287 | * "wire" on the specified device. |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 288 | */ |
| 289 | static int netvsc_recv_callback(struct hv_device *device_obj, |
| 290 | struct hv_netvsc_packet *packet) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 291 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 292 | struct vm_device *device_ctx = to_vm_device(device_obj); |
Greg Kroah-Hartman | 621d7fb | 2009-07-24 11:00:39 -0700 | [diff] [blame] | 293 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 294 | struct net_device_context *net_device_ctx; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 295 | struct sk_buff *skb; |
| 296 | void *data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 297 | int ret; |
| 298 | int i; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 299 | unsigned long flags; |
| 300 | |
| 301 | DPRINT_ENTER(NETVSC_DRV); |
| 302 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 303 | if (!net) { |
| 304 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " |
| 305 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | net_device_ctx = netdev_priv(net); |
| 310 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 311 | /* Allocate a skb - TODO preallocate this */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 312 | /* Pad 2-bytes to align IP header to 16 bytes */ |
| 313 | skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 314 | ASSERT(skb); |
| 315 | skb_reserve(skb, 2); |
| 316 | skb->dev = net; |
| 317 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 318 | /* for kmap_atomic */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 319 | local_irq_save(flags); |
| 320 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 321 | /* |
| 322 | * Copy to skb. This copy is needed here since the memory pointed by |
| 323 | * hv_netvsc_packet cannot be deallocated |
| 324 | */ |
| 325 | for (i = 0; i < packet->PageBufferCount; i++) { |
| 326 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), |
| 327 | KM_IRQ1); |
| 328 | data = (void *)(unsigned long)data + |
| 329 | packet->PageBuffers[i].Offset; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 330 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 331 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, |
| 332 | packet->PageBuffers[i].Length); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 333 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 334 | kunmap_atomic((void *)((unsigned long)data - |
| 335 | packet->PageBuffers[i].Offset), KM_IRQ1); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | local_irq_restore(flags); |
| 339 | |
| 340 | skb->protocol = eth_type_trans(skb, net); |
| 341 | |
| 342 | skb->ip_summed = CHECKSUM_NONE; |
| 343 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 344 | /* |
| 345 | * Pass the skb back up. Network stack will deallocate the skb when it |
| 346 | * is done |
| 347 | */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 348 | ret = netif_rx(skb); |
| 349 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 350 | switch (ret) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 351 | case NET_RX_DROP: |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame^] | 352 | net->stats.rx_dropped++; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 353 | break; |
| 354 | default: |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame^] | 355 | net->stats.rx_packets++; |
| 356 | net->stats.rx_bytes += skb->len; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 357 | break; |
| 358 | |
| 359 | } |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 360 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame^] | 361 | net->stats.rx_packets, net->stats.rx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 362 | |
| 363 | DPRINT_EXIT(NETVSC_DRV); |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 368 | static const struct net_device_ops device_ops = { |
| 369 | .ndo_open = netvsc_open, |
| 370 | .ndo_stop = netvsc_close, |
| 371 | .ndo_start_xmit = netvsc_start_xmit, |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 372 | .ndo_set_multicast_list = netvsc_set_multicast_list, |
| 373 | }; |
| 374 | |
| 375 | static int netvsc_probe(struct device *device) |
| 376 | { |
| 377 | struct driver_context *driver_ctx = |
| 378 | driver_to_driver_context(device->driver); |
| 379 | struct netvsc_driver_context *net_drv_ctx = |
| 380 | (struct netvsc_driver_context *)driver_ctx; |
| 381 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 382 | struct vm_device *device_ctx = device_to_vm_device(device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 383 | struct hv_device *device_obj = &device_ctx->device_obj; |
| 384 | struct net_device *net = NULL; |
| 385 | struct net_device_context *net_device_ctx; |
| 386 | struct netvsc_device_info device_info; |
| 387 | int ret; |
| 388 | |
| 389 | DPRINT_ENTER(NETVSC_DRV); |
| 390 | |
| 391 | if (!net_drv_obj->Base.OnDeviceAdd) |
| 392 | return -1; |
| 393 | |
| 394 | net = alloc_netdev(sizeof(struct net_device_context), "seth%d", |
| 395 | ether_setup); |
| 396 | if (!net) |
| 397 | return -1; |
| 398 | |
| 399 | /* Set initial state */ |
| 400 | netif_carrier_off(net); |
| 401 | netif_stop_queue(net); |
| 402 | |
| 403 | net_device_ctx = netdev_priv(net); |
| 404 | net_device_ctx->device_ctx = device_ctx; |
| 405 | dev_set_drvdata(device, net); |
| 406 | |
| 407 | /* Notify the netvsc driver of the new device */ |
| 408 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); |
| 409 | if (ret != 0) { |
| 410 | free_netdev(net); |
| 411 | dev_set_drvdata(device, NULL); |
| 412 | |
| 413 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", |
| 414 | ret); |
| 415 | return ret; |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * If carrier is still off ie we did not get a link status callback, |
| 420 | * update it if necessary |
| 421 | */ |
| 422 | /* |
| 423 | * FIXME: We should use a atomic or test/set instead to avoid getting |
| 424 | * out of sync with the device's link status |
| 425 | */ |
| 426 | if (!netif_carrier_ok(net)) |
| 427 | if (!device_info.LinkState) |
| 428 | netif_carrier_on(net); |
| 429 | |
| 430 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); |
| 431 | |
| 432 | net->netdev_ops = &device_ops; |
| 433 | |
| 434 | SET_NETDEV_DEV(net, device); |
| 435 | |
| 436 | ret = register_netdev(net); |
| 437 | if (ret != 0) { |
| 438 | /* Remove the device and release the resource */ |
| 439 | net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 440 | free_netdev(net); |
| 441 | } |
| 442 | |
| 443 | DPRINT_EXIT(NETVSC_DRV); |
| 444 | return ret; |
| 445 | } |
| 446 | |
| 447 | static int netvsc_remove(struct device *device) |
| 448 | { |
| 449 | struct driver_context *driver_ctx = |
| 450 | driver_to_driver_context(device->driver); |
| 451 | struct netvsc_driver_context *net_drv_ctx = |
| 452 | (struct netvsc_driver_context *)driver_ctx; |
| 453 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 454 | struct vm_device *device_ctx = device_to_vm_device(device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 455 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
| 456 | struct hv_device *device_obj = &device_ctx->device_obj; |
| 457 | int ret; |
| 458 | |
| 459 | DPRINT_ENTER(NETVSC_DRV); |
| 460 | |
| 461 | if (net == NULL) { |
| 462 | DPRINT_INFO(NETVSC, "no net device to remove"); |
| 463 | DPRINT_EXIT(NETVSC_DRV); |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | if (!net_drv_obj->Base.OnDeviceRemove) { |
| 468 | DPRINT_EXIT(NETVSC_DRV); |
| 469 | return -1; |
| 470 | } |
| 471 | |
| 472 | /* Stop outbound asap */ |
| 473 | netif_stop_queue(net); |
| 474 | /* netif_carrier_off(net); */ |
| 475 | |
| 476 | unregister_netdev(net); |
| 477 | |
| 478 | /* |
| 479 | * Call to the vsc driver to let it know that the device is being |
| 480 | * removed |
| 481 | */ |
| 482 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 483 | if (ret != 0) { |
| 484 | /* TODO: */ |
| 485 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); |
| 486 | } |
| 487 | |
| 488 | free_netdev(net); |
| 489 | DPRINT_EXIT(NETVSC_DRV); |
| 490 | return ret; |
| 491 | } |
| 492 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 493 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
| 494 | { |
| 495 | struct device **curr = (struct device **)data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 496 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 497 | *curr = dev; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 498 | /* stop iterating */ |
| 499 | return 1; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 500 | } |
| 501 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 502 | static void netvsc_drv_exit(void) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 503 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 504 | struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; |
| 505 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 506 | struct device *current_dev; |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 507 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 508 | |
| 509 | DPRINT_ENTER(NETVSC_DRV); |
| 510 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 511 | while (1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 512 | current_dev = NULL; |
| 513 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 514 | /* Get the device */ |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 515 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 516 | ¤t_dev, netvsc_drv_exit_cb); |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 517 | if (ret) |
| 518 | DPRINT_WARN(NETVSC_DRV, |
| 519 | "driver_for_each_device returned %d", ret); |
| 520 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 521 | if (current_dev == NULL) |
| 522 | break; |
| 523 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 524 | /* Initiate removal from the top-down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 525 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", |
| 526 | current_dev); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 527 | |
| 528 | device_unregister(current_dev); |
| 529 | } |
| 530 | |
| 531 | if (netvsc_drv_obj->Base.OnCleanup) |
| 532 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); |
| 533 | |
| 534 | vmbus_child_driver_unregister(drv_ctx); |
| 535 | |
| 536 | DPRINT_EXIT(NETVSC_DRV); |
| 537 | |
| 538 | return; |
| 539 | } |
| 540 | |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 541 | 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] | 542 | { |
| 543 | struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; |
| 544 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 545 | int ret; |
| 546 | |
| 547 | DPRINT_ENTER(NETVSC_DRV); |
| 548 | |
| 549 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); |
| 550 | |
| 551 | net_drv_obj->RingBufferSize = netvsc_ringbuffer_size; |
| 552 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; |
| 553 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; |
| 554 | |
| 555 | /* Callback to client driver to complete the initialization */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 556 | drv_init(&net_drv_obj->Base); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 557 | |
| 558 | drv_ctx->driver.name = net_drv_obj->Base.name; |
| 559 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, |
| 560 | sizeof(struct hv_guid)); |
| 561 | |
| 562 | drv_ctx->probe = netvsc_probe; |
| 563 | drv_ctx->remove = netvsc_remove; |
| 564 | |
| 565 | /* The driver belongs to vmbus */ |
| 566 | ret = vmbus_child_driver_register(drv_ctx); |
| 567 | |
| 568 | DPRINT_EXIT(NETVSC_DRV); |
| 569 | |
| 570 | return ret; |
| 571 | } |
| 572 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 573 | static int __init netvsc_init(void) |
| 574 | { |
| 575 | int ret; |
| 576 | |
| 577 | DPRINT_ENTER(NETVSC_DRV); |
| 578 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); |
| 579 | |
| 580 | ret = netvsc_drv_init(NetVscInitialize); |
| 581 | |
| 582 | DPRINT_EXIT(NETVSC_DRV); |
| 583 | |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | static void __exit netvsc_exit(void) |
| 588 | { |
| 589 | DPRINT_ENTER(NETVSC_DRV); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 590 | netvsc_drv_exit(); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 591 | DPRINT_EXIT(NETVSC_DRV); |
| 592 | } |
| 593 | |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 594 | MODULE_LICENSE("GPL"); |
| 595 | MODULE_VERSION(HV_DRV_VERSION); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 596 | module_param(netvsc_ringbuffer_size, int, S_IRUGO); |
| 597 | |
| 598 | module_init(netvsc_init); |
| 599 | module_exit(netvsc_exit); |