![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Conflicts: drivers/staging/arlan/arlan-main.c drivers/staging/comedi/drivers/cb_das16_cs.c drivers/staging/cx25821/cx25821-alsa.c drivers/staging/dt3155/dt3155_drv.c drivers/staging/hv/hv.c drivers/staging/netwave/netwave_cs.c drivers/staging/wavelan/wavelan.c drivers/staging/wavelan/wavelan_cs.c drivers/staging/wlags49_h2/wl_cs.c This required a bit of hand merging due to the conflicts that happened in the later .34-rc releases, as well as some staging driver changing coming in through other trees (v4l and pcmcia). Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
606 lines
15 KiB
C
606 lines
15 KiB
C
/*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/highmem.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/dmi.h>
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#include <linux/pci.h>
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#include <net/arp.h>
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#include <net/route.h>
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#include <net/sock.h>
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#include <net/pkt_sched.h>
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#include "osd.h"
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#include "logging.h"
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#include "version_info.h"
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#include "vmbus.h"
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#include "netvsc_api.h"
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struct net_device_context {
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/* point back to our device context */
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struct vm_device *device_ctx;
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unsigned long avail;
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};
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struct netvsc_driver_context {
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/* !! These must be the first 2 fields !! */
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/* Which is a bug FIXME! */
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struct driver_context drv_ctx;
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struct netvsc_driver drv_obj;
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};
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#define PACKET_PAGES_LOWATER 8
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/* Need this many pages to handle worst case fragmented packet */
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#define PACKET_PAGES_HIWATER (MAX_SKB_FRAGS + 2)
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static int ring_size = roundup_pow_of_two(2*MAX_SKB_FRAGS+1);
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module_param(ring_size, int, S_IRUGO);
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MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
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/* The one and only one */
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static struct netvsc_driver_context g_netvsc_drv;
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static void netvsc_set_multicast_list(struct net_device *net)
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{
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}
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static int netvsc_open(struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj;
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int ret = 0;
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DPRINT_ENTER(NETVSC_DRV);
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if (netif_carrier_ok(net)) {
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/* Open up the device */
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ret = RndisFilterOnOpen(device_obj);
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if (ret != 0) {
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DPRINT_ERR(NETVSC_DRV,
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"unable to open device (ret %d).", ret);
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return ret;
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}
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netif_start_queue(net);
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} else {
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DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down.");
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}
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DPRINT_EXIT(NETVSC_DRV);
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return ret;
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}
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static int netvsc_close(struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj;
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int ret;
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DPRINT_ENTER(NETVSC_DRV);
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netif_stop_queue(net);
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ret = RndisFilterOnClose(device_obj);
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if (ret != 0)
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DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret);
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DPRINT_EXIT(NETVSC_DRV);
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return ret;
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}
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static void netvsc_xmit_completion(void *context)
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{
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struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context;
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struct sk_buff *skb = (struct sk_buff *)
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(unsigned long)packet->Completion.Send.SendCompletionTid;
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DPRINT_ENTER(NETVSC_DRV);
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kfree(packet);
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if (skb) {
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struct net_device *net = skb->dev;
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struct net_device_context *net_device_ctx = netdev_priv(net);
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unsigned int num_pages = skb_shinfo(skb)->nr_frags + 2;
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dev_kfree_skb_any(skb);
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if ((net_device_ctx->avail += num_pages) >= PACKET_PAGES_HIWATER)
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netif_wake_queue(net);
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}
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DPRINT_EXIT(NETVSC_DRV);
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}
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static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
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{
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct driver_context *driver_ctx =
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driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
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struct netvsc_driver_context *net_drv_ctx =
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(struct netvsc_driver_context *)driver_ctx;
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struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
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struct hv_netvsc_packet *packet;
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int ret;
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unsigned int i, num_pages;
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DPRINT_ENTER(NETVSC_DRV);
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DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d",
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skb->len, skb->data_len);
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/* Add 1 for skb->data and additional one for RNDIS */
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num_pages = skb_shinfo(skb)->nr_frags + 1 + 1;
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if (num_pages > net_device_ctx->avail)
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return NETDEV_TX_BUSY;
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/* Allocate a netvsc packet based on # of frags. */
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packet = kzalloc(sizeof(struct hv_netvsc_packet) +
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(num_pages * sizeof(struct hv_page_buffer)) +
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net_drv_obj->RequestExtSize, GFP_ATOMIC);
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if (!packet) {
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/* out of memory, silently drop packet */
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DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet");
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dev_kfree_skb(skb);
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net->stats.tx_dropped++;
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return NETDEV_TX_OK;
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}
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packet->Extension = (void *)(unsigned long)packet +
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sizeof(struct hv_netvsc_packet) +
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(num_pages * sizeof(struct hv_page_buffer));
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/* Setup the rndis header */
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packet->PageBufferCount = num_pages;
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/* TODO: Flush all write buffers/ memory fence ??? */
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/* wmb(); */
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/* Initialize it from the skb */
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packet->TotalDataBufferLength = skb->len;
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/* Start filling in the page buffers starting after RNDIS buffer. */
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packet->PageBuffers[1].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT;
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packet->PageBuffers[1].Offset
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= (unsigned long)skb->data & (PAGE_SIZE - 1);
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packet->PageBuffers[1].Length = skb_headlen(skb);
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/* Additional fragments are after SKB data */
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for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
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skb_frag_t *f = &skb_shinfo(skb)->frags[i];
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packet->PageBuffers[i+2].Pfn = page_to_pfn(f->page);
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packet->PageBuffers[i+2].Offset = f->page_offset;
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packet->PageBuffers[i+2].Length = f->size;
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}
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/* Set the completion routine */
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packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion;
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packet->Completion.Send.SendCompletionContext = packet;
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packet->Completion.Send.SendCompletionTid = (unsigned long)skb;
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ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj,
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packet);
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if (ret == 0) {
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net->stats.tx_bytes += skb->len;
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net->stats.tx_packets++;
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DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu",
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net->stats.tx_packets,
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net->stats.tx_bytes);
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if ((net_device_ctx->avail -= num_pages) < PACKET_PAGES_LOWATER)
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netif_stop_queue(net);
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} else {
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/* we are shutting down or bus overloaded, just drop packet */
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net->stats.tx_dropped++;
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netvsc_xmit_completion(packet);
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}
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DPRINT_EXIT(NETVSC_DRV);
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return NETDEV_TX_OK;
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}
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/*
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* netvsc_linkstatus_callback - Link up/down notification
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*/
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static void netvsc_linkstatus_callback(struct hv_device *device_obj,
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unsigned int status)
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{
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struct vm_device *device_ctx = to_vm_device(device_obj);
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struct net_device *net = dev_get_drvdata(&device_ctx->device);
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DPRINT_ENTER(NETVSC_DRV);
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if (!net) {
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DPRINT_ERR(NETVSC_DRV, "got link status but net device "
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"not initialized yet");
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return;
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}
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if (status == 1) {
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netif_carrier_on(net);
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netif_wake_queue(net);
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} else {
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netif_carrier_off(net);
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netif_stop_queue(net);
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}
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DPRINT_EXIT(NETVSC_DRV);
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}
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/*
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* netvsc_recv_callback - Callback when we receive a packet from the
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* "wire" on the specified device.
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*/
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static int netvsc_recv_callback(struct hv_device *device_obj,
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struct hv_netvsc_packet *packet)
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{
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struct vm_device *device_ctx = to_vm_device(device_obj);
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struct net_device *net = dev_get_drvdata(&device_ctx->device);
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struct sk_buff *skb;
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void *data;
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int i;
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unsigned long flags;
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DPRINT_ENTER(NETVSC_DRV);
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if (!net) {
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DPRINT_ERR(NETVSC_DRV, "got receive callback but net device "
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"not initialized yet");
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return 0;
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}
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/* Allocate a skb - TODO direct I/O to pages? */
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skb = netdev_alloc_skb_ip_align(net, packet->TotalDataBufferLength);
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if (unlikely(!skb)) {
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++net->stats.rx_dropped;
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return 0;
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}
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/* for kmap_atomic */
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local_irq_save(flags);
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/*
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* Copy to skb. This copy is needed here since the memory pointed by
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* hv_netvsc_packet cannot be deallocated
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*/
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for (i = 0; i < packet->PageBufferCount; i++) {
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data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn),
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KM_IRQ1);
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data = (void *)(unsigned long)data +
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packet->PageBuffers[i].Offset;
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memcpy(skb_put(skb, packet->PageBuffers[i].Length), data,
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packet->PageBuffers[i].Length);
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kunmap_atomic((void *)((unsigned long)data -
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packet->PageBuffers[i].Offset), KM_IRQ1);
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}
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local_irq_restore(flags);
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skb->protocol = eth_type_trans(skb, net);
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skb->ip_summed = CHECKSUM_NONE;
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net->stats.rx_packets++;
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net->stats.rx_bytes += skb->len;
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/*
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* Pass the skb back up. Network stack will deallocate the skb when it
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* is done.
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* TODO - use NAPI?
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*/
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netif_rx(skb);
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DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu",
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net->stats.rx_packets, net->stats.rx_bytes);
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DPRINT_EXIT(NETVSC_DRV);
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return 0;
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}
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static void netvsc_get_drvinfo(struct net_device *net,
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struct ethtool_drvinfo *info)
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{
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strcpy(info->driver, "hv_netvsc");
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strcpy(info->version, HV_DRV_VERSION);
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strcpy(info->fw_version, "N/A");
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}
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static const struct ethtool_ops ethtool_ops = {
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.get_drvinfo = netvsc_get_drvinfo,
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.get_sg = ethtool_op_get_sg,
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.set_sg = ethtool_op_set_sg,
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.get_link = ethtool_op_get_link,
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};
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static const struct net_device_ops device_ops = {
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.ndo_open = netvsc_open,
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.ndo_stop = netvsc_close,
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.ndo_start_xmit = netvsc_start_xmit,
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.ndo_set_multicast_list = netvsc_set_multicast_list,
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};
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static int netvsc_probe(struct device *device)
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{
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struct driver_context *driver_ctx =
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driver_to_driver_context(device->driver);
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struct netvsc_driver_context *net_drv_ctx =
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(struct netvsc_driver_context *)driver_ctx;
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struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
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struct vm_device *device_ctx = device_to_vm_device(device);
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struct hv_device *device_obj = &device_ctx->device_obj;
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struct net_device *net = NULL;
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struct net_device_context *net_device_ctx;
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struct netvsc_device_info device_info;
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int ret;
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DPRINT_ENTER(NETVSC_DRV);
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if (!net_drv_obj->Base.OnDeviceAdd)
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return -1;
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net = alloc_etherdev(sizeof(struct net_device_context));
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if (!net)
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return -1;
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/* Set initial state */
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netif_carrier_off(net);
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netif_stop_queue(net);
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net_device_ctx = netdev_priv(net);
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net_device_ctx->device_ctx = device_ctx;
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net_device_ctx->avail = ring_size;
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dev_set_drvdata(device, net);
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/* Notify the netvsc driver of the new device */
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ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info);
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if (ret != 0) {
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free_netdev(net);
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dev_set_drvdata(device, NULL);
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DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)",
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ret);
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return ret;
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}
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/*
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* If carrier is still off ie we did not get a link status callback,
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* update it if necessary
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*/
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/*
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* FIXME: We should use a atomic or test/set instead to avoid getting
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* out of sync with the device's link status
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*/
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if (!netif_carrier_ok(net))
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if (!device_info.LinkState)
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netif_carrier_on(net);
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memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN);
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net->netdev_ops = &device_ops;
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/* TODO: Add GSO and Checksum offload */
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net->features = NETIF_F_SG;
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SET_ETHTOOL_OPS(net, ðtool_ops);
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SET_NETDEV_DEV(net, device);
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ret = register_netdev(net);
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if (ret != 0) {
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/* Remove the device and release the resource */
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net_drv_obj->Base.OnDeviceRemove(device_obj);
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free_netdev(net);
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}
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DPRINT_EXIT(NETVSC_DRV);
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return ret;
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}
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static int netvsc_remove(struct device *device)
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{
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struct driver_context *driver_ctx =
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driver_to_driver_context(device->driver);
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struct netvsc_driver_context *net_drv_ctx =
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(struct netvsc_driver_context *)driver_ctx;
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struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
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struct vm_device *device_ctx = device_to_vm_device(device);
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struct net_device *net = dev_get_drvdata(&device_ctx->device);
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struct hv_device *device_obj = &device_ctx->device_obj;
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int ret;
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DPRINT_ENTER(NETVSC_DRV);
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if (net == NULL) {
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DPRINT_INFO(NETVSC, "no net device to remove");
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DPRINT_EXIT(NETVSC_DRV);
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return 0;
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}
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if (!net_drv_obj->Base.OnDeviceRemove) {
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DPRINT_EXIT(NETVSC_DRV);
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return -1;
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}
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/* Stop outbound asap */
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netif_stop_queue(net);
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/* netif_carrier_off(net); */
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unregister_netdev(net);
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/*
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* Call to the vsc driver to let it know that the device is being
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* removed
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*/
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ret = net_drv_obj->Base.OnDeviceRemove(device_obj);
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if (ret != 0) {
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/* TODO: */
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DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret);
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}
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free_netdev(net);
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DPRINT_EXIT(NETVSC_DRV);
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return ret;
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}
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static int netvsc_drv_exit_cb(struct device *dev, void *data)
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{
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struct device **curr = (struct device **)data;
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*curr = dev;
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/* stop iterating */
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return 1;
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}
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static void netvsc_drv_exit(void)
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{
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struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj;
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struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
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struct device *current_dev;
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int ret;
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DPRINT_ENTER(NETVSC_DRV);
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while (1) {
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current_dev = NULL;
|
|
|
|
/* Get the device */
|
|
ret = driver_for_each_device(&drv_ctx->driver, NULL,
|
|
¤t_dev, netvsc_drv_exit_cb);
|
|
if (ret)
|
|
DPRINT_WARN(NETVSC_DRV,
|
|
"driver_for_each_device returned %d", ret);
|
|
|
|
if (current_dev == NULL)
|
|
break;
|
|
|
|
/* Initiate removal from the top-down */
|
|
DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...",
|
|
current_dev);
|
|
|
|
device_unregister(current_dev);
|
|
}
|
|
|
|
if (netvsc_drv_obj->Base.OnCleanup)
|
|
netvsc_drv_obj->Base.OnCleanup(&netvsc_drv_obj->Base);
|
|
|
|
vmbus_child_driver_unregister(drv_ctx);
|
|
|
|
DPRINT_EXIT(NETVSC_DRV);
|
|
|
|
return;
|
|
}
|
|
|
|
static int netvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
|
|
{
|
|
struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj;
|
|
struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
|
|
int ret;
|
|
|
|
DPRINT_ENTER(NETVSC_DRV);
|
|
|
|
vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface);
|
|
|
|
net_drv_obj->RingBufferSize = ring_size * PAGE_SIZE;
|
|
net_drv_obj->OnReceiveCallback = netvsc_recv_callback;
|
|
net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback;
|
|
|
|
/* Callback to client driver to complete the initialization */
|
|
drv_init(&net_drv_obj->Base);
|
|
|
|
drv_ctx->driver.name = net_drv_obj->Base.name;
|
|
memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType,
|
|
sizeof(struct hv_guid));
|
|
|
|
drv_ctx->probe = netvsc_probe;
|
|
drv_ctx->remove = netvsc_remove;
|
|
|
|
/* The driver belongs to vmbus */
|
|
ret = vmbus_child_driver_register(drv_ctx);
|
|
|
|
DPRINT_EXIT(NETVSC_DRV);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct dmi_system_id __initconst
|
|
hv_netvsc_dmi_table[] __maybe_unused = {
|
|
{
|
|
.ident = "Hyper-V",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
|
|
},
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(dmi, hv_netvsc_dmi_table);
|
|
|
|
static int __init netvsc_init(void)
|
|
{
|
|
int ret;
|
|
|
|
DPRINT_ENTER(NETVSC_DRV);
|
|
DPRINT_INFO(NETVSC_DRV, "Netvsc initializing....");
|
|
|
|
if (!dmi_check_system(hv_netvsc_dmi_table))
|
|
return -ENODEV;
|
|
|
|
ret = netvsc_drv_init(NetVscInitialize);
|
|
|
|
DPRINT_EXIT(NETVSC_DRV);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit netvsc_exit(void)
|
|
{
|
|
DPRINT_ENTER(NETVSC_DRV);
|
|
netvsc_drv_exit();
|
|
DPRINT_EXIT(NETVSC_DRV);
|
|
}
|
|
|
|
static const struct pci_device_id __initconst
|
|
hv_netvsc_pci_table[] __maybe_unused = {
|
|
{ PCI_DEVICE(0x1414, 0x5353) }, /* VGA compatible controller */
|
|
{ 0 }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, hv_netvsc_pci_table);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(HV_DRV_VERSION);
|
|
MODULE_DESCRIPTION("Microsoft Hyper-V network driver");
|
|
|
|
module_init(netvsc_init);
|
|
module_exit(netvsc_exit);
|