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; |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 46 | unsigned long avail; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 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 | |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 56 | #define PACKET_PAGES_LOWATER 8 |
| 57 | /* Need this many pages to handle worst case fragmented packet */ |
| 58 | #define PACKET_PAGES_HIWATER (MAX_SKB_FRAGS + 2) |
| 59 | |
Stephen Hemminger | 450d7a4 | 2010-05-04 09:58:53 -0700 | [diff] [blame] | 60 | static int ring_size = roundup_pow_of_two(2*MAX_SKB_FRAGS+1); |
| 61 | module_param(ring_size, int, S_IRUGO); |
| 62 | MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 63 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 64 | /* The one and only one */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 65 | static struct netvsc_driver_context g_netvsc_drv; |
| 66 | |
Greg Kroah-Hartman | 4e9bfef | 2009-07-15 12:45:20 -0700 | [diff] [blame] | 67 | static void netvsc_set_multicast_list(struct net_device *net) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 68 | { |
| 69 | } |
| 70 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 71 | static int netvsc_open(struct net_device *net) |
| 72 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 73 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 74 | 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] | 75 | int ret = 0; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 76 | |
| 77 | DPRINT_ENTER(NETVSC_DRV); |
| 78 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 79 | if (netif_carrier_ok(net)) { |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 80 | /* Open up the device */ |
Greg Kroah-Hartman | 2d07534 | 2010-01-08 10:24:42 -0800 | [diff] [blame] | 81 | ret = RndisFilterOnOpen(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 82 | if (ret != 0) { |
| 83 | DPRINT_ERR(NETVSC_DRV, |
| 84 | "unable to open device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 85 | return ret; |
| 86 | } |
| 87 | |
| 88 | netif_start_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 89 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 90 | DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); |
| 91 | } |
| 92 | |
| 93 | DPRINT_EXIT(NETVSC_DRV); |
| 94 | return ret; |
| 95 | } |
| 96 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 97 | static int netvsc_close(struct net_device *net) |
| 98 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 99 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Nicolas Palix | 3d3b551 | 2009-07-28 17:32:53 +0200 | [diff] [blame] | 100 | 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] | 101 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 102 | |
| 103 | DPRINT_ENTER(NETVSC_DRV); |
| 104 | |
| 105 | netif_stop_queue(net); |
| 106 | |
Greg Kroah-Hartman | 4f28900 | 2010-01-08 10:25:01 -0800 | [diff] [blame] | 107 | ret = RndisFilterOnClose(device_obj); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 108 | if (ret != 0) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 109 | DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 110 | |
| 111 | DPRINT_EXIT(NETVSC_DRV); |
| 112 | |
| 113 | return ret; |
| 114 | } |
| 115 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 116 | static void netvsc_xmit_completion(void *context) |
| 117 | { |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 118 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 119 | struct sk_buff *skb = (struct sk_buff *) |
| 120 | (unsigned long)packet->Completion.Send.SendCompletionTid; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 121 | |
| 122 | DPRINT_ENTER(NETVSC_DRV); |
| 123 | |
| 124 | kfree(packet); |
| 125 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 126 | if (skb) { |
Stephen Hemminger | 7880fc54c | 2010-05-04 09:58:52 -0700 | [diff] [blame] | 127 | struct net_device *net = skb->dev; |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 128 | struct net_device_context *net_device_ctx = netdev_priv(net); |
| 129 | unsigned int num_pages = skb_shinfo(skb)->nr_frags + 2; |
| 130 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 131 | dev_kfree_skb_any(skb); |
| 132 | |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 133 | if ((net_device_ctx->avail += num_pages) >= PACKET_PAGES_HIWATER) |
| 134 | netif_wake_queue(net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | DPRINT_EXIT(NETVSC_DRV); |
| 138 | } |
| 139 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 140 | 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] | 141 | { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 142 | struct net_device_context *net_device_ctx = netdev_priv(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 143 | struct driver_context *driver_ctx = |
| 144 | driver_to_driver_context(net_device_ctx->device_ctx->device.driver); |
| 145 | struct netvsc_driver_context *net_drv_ctx = |
| 146 | (struct netvsc_driver_context *)driver_ctx; |
Greg Kroah-Hartman | 7e23a6e | 2009-08-27 15:58:15 -0700 | [diff] [blame] | 147 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 148 | struct hv_netvsc_packet *packet; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 149 | int ret; |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 150 | unsigned int i, num_pages; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 151 | |
| 152 | DPRINT_ENTER(NETVSC_DRV); |
| 153 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 154 | DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", |
| 155 | skb->len, skb->data_len); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 156 | |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 157 | /* Add 1 for skb->data and additional one for RNDIS */ |
| 158 | num_pages = skb_shinfo(skb)->nr_frags + 1 + 1; |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 159 | if (num_pages > net_device_ctx->avail) |
| 160 | return NETDEV_TX_BUSY; |
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) + |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 164 | (num_pages * sizeof(struct hv_page_buffer)) + |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 165 | net_drv_obj->RequestExtSize, GFP_ATOMIC); |
| 166 | if (!packet) { |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 167 | /* out of memory, silently drop packet */ |
Nicolas Palix | 4193d4f | 2009-07-29 14:10:10 +0200 | [diff] [blame] | 168 | DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet"); |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 169 | |
| 170 | dev_kfree_skb(skb); |
| 171 | net->stats.tx_dropped++; |
| 172 | return NETDEV_TX_OK; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 173 | } |
| 174 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 175 | packet->Extension = (void *)(unsigned long)packet + |
| 176 | sizeof(struct hv_netvsc_packet) + |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 177 | (num_pages * sizeof(struct hv_page_buffer)); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 178 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 179 | /* Setup the rndis header */ |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 180 | packet->PageBufferCount = num_pages; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 181 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 182 | /* TODO: Flush all write buffers/ memory fence ??? */ |
| 183 | /* wmb(); */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 184 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 185 | /* Initialize it from the skb */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 186 | packet->TotalDataBufferLength = skb->len; |
| 187 | |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 188 | /* Start filling in the page buffers starting after RNDIS buffer. */ |
| 189 | packet->PageBuffers[1].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT; |
| 190 | packet->PageBuffers[1].Offset |
| 191 | = (unsigned long)skb->data & (PAGE_SIZE - 1); |
| 192 | packet->PageBuffers[1].Length = skb_headlen(skb); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 193 | |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 194 | /* Additional fragments are after SKB data */ |
| 195 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| 196 | skb_frag_t *f = &skb_shinfo(skb)->frags[i]; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 197 | |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 198 | packet->PageBuffers[i+2].Pfn = page_to_pfn(f->page); |
| 199 | packet->PageBuffers[i+2].Offset = f->page_offset; |
| 200 | packet->PageBuffers[i+2].Length = f->size; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 203 | /* Set the completion routine */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 204 | packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion; |
| 205 | packet->Completion.Send.SendCompletionContext = packet; |
Greg Kroah-Hartman | c4b0bc9 | 2009-07-14 15:12:46 -0700 | [diff] [blame] | 206 | packet->Completion.Send.SendCompletionTid = (unsigned long)skb; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 207 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 208 | ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, |
| 209 | packet); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 210 | if (ret == 0) { |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame] | 211 | net->stats.tx_bytes += skb->len; |
| 212 | net->stats.tx_packets++; |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 213 | |
| 214 | DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", |
| 215 | net->stats.tx_packets, |
| 216 | net->stats.tx_bytes); |
| 217 | |
| 218 | if ((net_device_ctx->avail -= num_pages) < PACKET_PAGES_LOWATER) |
| 219 | netif_stop_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 220 | } else { |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 221 | /* we are shutting down or bus overloaded, just drop packet */ |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame] | 222 | net->stats.tx_dropped++; |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 223 | netvsc_xmit_completion(packet); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 224 | } |
| 225 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 226 | DPRINT_EXIT(NETVSC_DRV); |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 227 | return NETDEV_TX_OK; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 228 | } |
| 229 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 230 | /* |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 231 | * netvsc_linkstatus_callback - Link up/down notification |
| 232 | */ |
| 233 | static void netvsc_linkstatus_callback(struct hv_device *device_obj, |
| 234 | unsigned int status) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 235 | { |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 236 | struct vm_device *device_ctx = to_vm_device(device_obj); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 237 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 238 | |
| 239 | DPRINT_ENTER(NETVSC_DRV); |
| 240 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 241 | if (!net) { |
| 242 | DPRINT_ERR(NETVSC_DRV, "got link status but net device " |
| 243 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 244 | return; |
| 245 | } |
| 246 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 247 | if (status == 1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 248 | netif_carrier_on(net); |
| 249 | netif_wake_queue(net); |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 250 | } else { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 251 | netif_carrier_off(net); |
| 252 | netif_stop_queue(net); |
| 253 | } |
| 254 | DPRINT_EXIT(NETVSC_DRV); |
| 255 | } |
| 256 | |
Hank Janssen | 3e18951 | 2010-03-04 22:11:00 +0000 | [diff] [blame] | 257 | /* |
| 258 | * netvsc_recv_callback - Callback when we receive a packet from the |
| 259 | * "wire" on the specified device. |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 260 | */ |
| 261 | static int netvsc_recv_callback(struct hv_device *device_obj, |
| 262 | struct hv_netvsc_packet *packet) |
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 | 621d7fb | 2009-07-24 11:00:39 -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 | struct sk_buff *skb; |
| 267 | void *data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 268 | int i; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 269 | unsigned long flags; |
| 270 | |
| 271 | DPRINT_ENTER(NETVSC_DRV); |
| 272 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 273 | if (!net) { |
| 274 | DPRINT_ERR(NETVSC_DRV, "got receive callback but net device " |
| 275 | "not initialized yet"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 276 | return 0; |
| 277 | } |
| 278 | |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 279 | /* Allocate a skb - TODO direct I/O to pages? */ |
| 280 | skb = netdev_alloc_skb_ip_align(net, packet->TotalDataBufferLength); |
| 281 | if (unlikely(!skb)) { |
| 282 | ++net->stats.rx_dropped; |
| 283 | return 0; |
| 284 | } |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 285 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 286 | /* for kmap_atomic */ |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 287 | local_irq_save(flags); |
| 288 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 289 | /* |
| 290 | * Copy to skb. This copy is needed here since the memory pointed by |
| 291 | * hv_netvsc_packet cannot be deallocated |
| 292 | */ |
| 293 | for (i = 0; i < packet->PageBufferCount; i++) { |
| 294 | data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), |
| 295 | KM_IRQ1); |
| 296 | data = (void *)(unsigned long)data + |
| 297 | packet->PageBuffers[i].Offset; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 298 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 299 | memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, |
| 300 | packet->PageBuffers[i].Length); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 301 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 302 | kunmap_atomic((void *)((unsigned long)data - |
| 303 | packet->PageBuffers[i].Offset), KM_IRQ1); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | local_irq_restore(flags); |
| 307 | |
| 308 | skb->protocol = eth_type_trans(skb, net); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 309 | skb->ip_summed = CHECKSUM_NONE; |
| 310 | |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 311 | net->stats.rx_packets++; |
| 312 | net->stats.rx_bytes += skb->len; |
| 313 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 314 | /* |
| 315 | * Pass the skb back up. Network stack will deallocate the skb when it |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 316 | * is done. |
| 317 | * TODO - use NAPI? |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 318 | */ |
Stephen Hemminger | 9495c28 | 2010-03-09 17:42:17 -0800 | [diff] [blame] | 319 | netif_rx(skb); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 320 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 321 | DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", |
Stephen Hemminger | b852fdc | 2010-03-09 17:42:33 -0800 | [diff] [blame] | 322 | net->stats.rx_packets, net->stats.rx_bytes); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 323 | |
| 324 | DPRINT_EXIT(NETVSC_DRV); |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 329 | static const struct net_device_ops device_ops = { |
| 330 | .ndo_open = netvsc_open, |
| 331 | .ndo_stop = netvsc_close, |
| 332 | .ndo_start_xmit = netvsc_start_xmit, |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 333 | .ndo_set_multicast_list = netvsc_set_multicast_list, |
| 334 | }; |
| 335 | |
| 336 | static int netvsc_probe(struct device *device) |
| 337 | { |
| 338 | struct driver_context *driver_ctx = |
| 339 | driver_to_driver_context(device->driver); |
| 340 | struct netvsc_driver_context *net_drv_ctx = |
| 341 | (struct netvsc_driver_context *)driver_ctx; |
| 342 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 343 | struct vm_device *device_ctx = device_to_vm_device(device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 344 | struct hv_device *device_obj = &device_ctx->device_obj; |
| 345 | struct net_device *net = NULL; |
| 346 | struct net_device_context *net_device_ctx; |
| 347 | struct netvsc_device_info device_info; |
| 348 | int ret; |
| 349 | |
| 350 | DPRINT_ENTER(NETVSC_DRV); |
| 351 | |
| 352 | if (!net_drv_obj->Base.OnDeviceAdd) |
| 353 | return -1; |
| 354 | |
| 355 | net = alloc_netdev(sizeof(struct net_device_context), "seth%d", |
| 356 | ether_setup); |
| 357 | if (!net) |
| 358 | return -1; |
| 359 | |
| 360 | /* Set initial state */ |
| 361 | netif_carrier_off(net); |
| 362 | netif_stop_queue(net); |
| 363 | |
| 364 | net_device_ctx = netdev_priv(net); |
| 365 | net_device_ctx->device_ctx = device_ctx; |
Stephen Hemminger | b220f5f | 2010-05-04 09:58:56 -0700 | [diff] [blame^] | 366 | net_device_ctx->avail = ring_size; |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 367 | dev_set_drvdata(device, net); |
| 368 | |
| 369 | /* Notify the netvsc driver of the new device */ |
| 370 | ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info); |
| 371 | if (ret != 0) { |
| 372 | free_netdev(net); |
| 373 | dev_set_drvdata(device, NULL); |
| 374 | |
| 375 | DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", |
| 376 | ret); |
| 377 | return ret; |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * If carrier is still off ie we did not get a link status callback, |
| 382 | * update it if necessary |
| 383 | */ |
| 384 | /* |
| 385 | * FIXME: We should use a atomic or test/set instead to avoid getting |
| 386 | * out of sync with the device's link status |
| 387 | */ |
| 388 | if (!netif_carrier_ok(net)) |
| 389 | if (!device_info.LinkState) |
| 390 | netif_carrier_on(net); |
| 391 | |
| 392 | memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); |
| 393 | |
| 394 | net->netdev_ops = &device_ops; |
| 395 | |
Stephen Hemminger | 6048718 | 2010-05-04 09:58:55 -0700 | [diff] [blame] | 396 | /* TODO: Add GSO and Checksum offload */ |
| 397 | net->features = NETIF_F_SG; |
| 398 | |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 399 | SET_NETDEV_DEV(net, device); |
| 400 | |
| 401 | ret = register_netdev(net); |
| 402 | if (ret != 0) { |
| 403 | /* Remove the device and release the resource */ |
| 404 | net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 405 | free_netdev(net); |
| 406 | } |
| 407 | |
| 408 | DPRINT_EXIT(NETVSC_DRV); |
| 409 | return ret; |
| 410 | } |
| 411 | |
| 412 | static int netvsc_remove(struct device *device) |
| 413 | { |
| 414 | struct driver_context *driver_ctx = |
| 415 | driver_to_driver_context(device->driver); |
| 416 | struct netvsc_driver_context *net_drv_ctx = |
| 417 | (struct netvsc_driver_context *)driver_ctx; |
| 418 | struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; |
Haiyang Zhang | f916a34 | 2010-02-17 20:58:47 +0000 | [diff] [blame] | 419 | struct vm_device *device_ctx = device_to_vm_device(device); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 420 | struct net_device *net = dev_get_drvdata(&device_ctx->device); |
| 421 | struct hv_device *device_obj = &device_ctx->device_obj; |
| 422 | int ret; |
| 423 | |
| 424 | DPRINT_ENTER(NETVSC_DRV); |
| 425 | |
| 426 | if (net == NULL) { |
| 427 | DPRINT_INFO(NETVSC, "no net device to remove"); |
| 428 | DPRINT_EXIT(NETVSC_DRV); |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | if (!net_drv_obj->Base.OnDeviceRemove) { |
| 433 | DPRINT_EXIT(NETVSC_DRV); |
| 434 | return -1; |
| 435 | } |
| 436 | |
| 437 | /* Stop outbound asap */ |
| 438 | netif_stop_queue(net); |
| 439 | /* netif_carrier_off(net); */ |
| 440 | |
| 441 | unregister_netdev(net); |
| 442 | |
| 443 | /* |
| 444 | * Call to the vsc driver to let it know that the device is being |
| 445 | * removed |
| 446 | */ |
| 447 | ret = net_drv_obj->Base.OnDeviceRemove(device_obj); |
| 448 | if (ret != 0) { |
| 449 | /* TODO: */ |
| 450 | DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); |
| 451 | } |
| 452 | |
| 453 | free_netdev(net); |
| 454 | DPRINT_EXIT(NETVSC_DRV); |
| 455 | return ret; |
| 456 | } |
| 457 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 458 | static int netvsc_drv_exit_cb(struct device *dev, void *data) |
| 459 | { |
| 460 | struct device **curr = (struct device **)data; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 461 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 462 | *curr = dev; |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 463 | /* stop iterating */ |
| 464 | return 1; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 465 | } |
| 466 | |
Greg Kroah-Hartman | bd1de70 | 2009-07-29 09:04:51 -0700 | [diff] [blame] | 467 | static void netvsc_drv_exit(void) |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 468 | { |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 469 | struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj; |
| 470 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 471 | struct device *current_dev; |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 472 | int ret; |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 473 | |
| 474 | DPRINT_ENTER(NETVSC_DRV); |
| 475 | |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 476 | while (1) { |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 477 | current_dev = NULL; |
| 478 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 479 | /* Get the device */ |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 480 | ret = driver_for_each_device(&drv_ctx->driver, NULL, |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 481 | ¤t_dev, netvsc_drv_exit_cb); |
Bill Pemberton | 2295ba2 | 2009-07-28 13:46:22 -0400 | [diff] [blame] | 482 | if (ret) |
| 483 | DPRINT_WARN(NETVSC_DRV, |
| 484 | "driver_for_each_device returned %d", ret); |
| 485 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 486 | if (current_dev == NULL) |
| 487 | break; |
| 488 | |
Bill Pemberton | 454f18a | 2009-07-27 16:47:24 -0400 | [diff] [blame] | 489 | /* Initiate removal from the top-down */ |
Greg Kroah-Hartman | 02fafbc | 2009-08-31 21:09:45 -0700 | [diff] [blame] | 490 | DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", |
| 491 | current_dev); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 492 | |
| 493 | device_unregister(current_dev); |
| 494 | } |
| 495 | |
| 496 | if (netvsc_drv_obj->Base.OnCleanup) |
| 497 | netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base); |
| 498 | |
| 499 | vmbus_child_driver_unregister(drv_ctx); |
| 500 | |
| 501 | DPRINT_EXIT(NETVSC_DRV); |
| 502 | |
| 503 | return; |
| 504 | } |
| 505 | |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 506 | 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] | 507 | { |
| 508 | struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj; |
| 509 | struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx; |
| 510 | int ret; |
| 511 | |
| 512 | DPRINT_ENTER(NETVSC_DRV); |
| 513 | |
| 514 | vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface); |
| 515 | |
Stephen Hemminger | 450d7a4 | 2010-05-04 09:58:53 -0700 | [diff] [blame] | 516 | net_drv_obj->RingBufferSize = ring_size * PAGE_SIZE; |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 517 | net_drv_obj->OnReceiveCallback = netvsc_recv_callback; |
| 518 | net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback; |
| 519 | |
| 520 | /* Callback to client driver to complete the initialization */ |
Greg Kroah-Hartman | 21707be | 2009-09-02 11:53:59 -0700 | [diff] [blame] | 521 | drv_init(&net_drv_obj->Base); |
Greg Kroah-Hartman | df2fff2 | 2009-08-31 21:11:12 -0700 | [diff] [blame] | 522 | |
| 523 | drv_ctx->driver.name = net_drv_obj->Base.name; |
| 524 | memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, |
| 525 | sizeof(struct hv_guid)); |
| 526 | |
| 527 | drv_ctx->probe = netvsc_probe; |
| 528 | drv_ctx->remove = netvsc_remove; |
| 529 | |
| 530 | /* The driver belongs to vmbus */ |
| 531 | ret = vmbus_child_driver_register(drv_ctx); |
| 532 | |
| 533 | DPRINT_EXIT(NETVSC_DRV); |
| 534 | |
| 535 | return ret; |
| 536 | } |
| 537 | |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 538 | static int __init netvsc_init(void) |
| 539 | { |
| 540 | int ret; |
| 541 | |
| 542 | DPRINT_ENTER(NETVSC_DRV); |
| 543 | DPRINT_INFO(NETVSC_DRV, "Netvsc initializing...."); |
| 544 | |
| 545 | ret = netvsc_drv_init(NetVscInitialize); |
| 546 | |
| 547 | DPRINT_EXIT(NETVSC_DRV); |
| 548 | |
| 549 | return ret; |
| 550 | } |
| 551 | |
| 552 | static void __exit netvsc_exit(void) |
| 553 | { |
| 554 | DPRINT_ENTER(NETVSC_DRV); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 555 | netvsc_drv_exit(); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 556 | DPRINT_EXIT(NETVSC_DRV); |
| 557 | } |
| 558 | |
Hank Janssen | 26c14cc | 2010-02-11 23:02:42 +0000 | [diff] [blame] | 559 | MODULE_LICENSE("GPL"); |
| 560 | MODULE_VERSION(HV_DRV_VERSION); |
Stephen Hemminger | 7880fc54c | 2010-05-04 09:58:52 -0700 | [diff] [blame] | 561 | MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
Hank Janssen | fceaf24 | 2009-07-13 15:34:54 -0700 | [diff] [blame] | 562 | |
| 563 | module_init(netvsc_init); |
| 564 | module_exit(netvsc_exit); |