/*
- *
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
- *
*/
-
#include <linux/init.h>
#include <linux/module.h>
#include <linux/highmem.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/in.h>
+#include <linux/slab.h>
#include <net/arp.h>
#include <net/route.h>
#include <net/sock.h>
#include <net/pkt_sched.h>
+#include "osd.h"
+#include "logging.h"
+#include "VersionInfo.h"
+#include "vmbus.h"
+#include "NetVscApi.h"
-#include "include/logging.h"
-#include "include/vmbus.h"
-
-#include "include/NetVscApi.h"
-
-MODULE_LICENSE("GPL");
-
-//
-// Static decl
-//
-static int netvsc_probe(struct device *device);
-static int netvsc_remove(struct device *device);
-static int netvsc_open(struct net_device *net);
-static void netvsc_xmit_completion(void *context);
-static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net);
-static int netvsc_recv_callback(DEVICE_OBJECT *device_obj, NETVSC_PACKET* Packet);
-static int netvsc_close(struct net_device *net);
-static struct net_device_stats *netvsc_get_stats(struct net_device *net);
-static void netvsc_linkstatus_callback(DEVICE_OBJECT *device_obj, unsigned int status);
-
-//
-// Data types
-//
struct net_device_context {
- struct device_context *device_ctx; // point back to our device context
+ /* point back to our device context */
+ struct vm_device *device_ctx;
struct net_device_stats stats;
};
struct netvsc_driver_context {
- // !! These must be the first 2 fields !!
- struct driver_context drv_ctx;
- NETVSC_DRIVER_OBJECT drv_obj;
+ /* !! These must be the first 2 fields !! */
+ /* Which is a bug FIXME! */
+ struct driver_context drv_ctx;
+ struct netvsc_driver drv_obj;
};
-//
-// Globals
-//
-
static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE;
-// The one and only one
+/* The one and only one */
static struct netvsc_driver_context g_netvsc_drv;
-//
-// Routines
-//
-
-/*++
-
-Name: netvsc_drv_init()
-
-Desc: NetVsc driver initialization
-
---*/
-int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
-{
- int ret=0;
- NETVSC_DRIVER_OBJECT *net_drv_obj=&g_netvsc_drv.drv_obj;
- struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx;
-
- DPRINT_ENTER(NETVSC_DRV);
-
- vmbus_get_interface(&net_drv_obj->Base.VmbusChannelInterface);
-
- net_drv_obj->RingBufferSize = netvsc_ringbuffer_size;
- net_drv_obj->OnReceiveCallback = netvsc_recv_callback;
- net_drv_obj->OnLinkStatusChanged = netvsc_linkstatus_callback;
-
- // Callback to client driver to complete the initialization
- pfn_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(GUID));
-
- drv_ctx->probe = netvsc_probe;
- drv_ctx->remove = netvsc_remove;
-
- // The driver belongs to vmbus
- vmbus_child_driver_register(drv_ctx);
-
- DPRINT_EXIT(NETVSC_DRV);
-
- return ret;
-}
-
-/*++
-
-Name: netvsc_get_stats()
-
-Desc: Get the network stats
-
---*/
static struct net_device_stats *netvsc_get_stats(struct net_device *net)
{
struct net_device_context *net_device_ctx = netdev_priv(net);
return &net_device_ctx->stats;
}
-/*++
-
-Name: netvsc_set_multicast_list()
-
-Desc: Set the multicast list
-
-Remark: No-op here
---*/
static void netvsc_set_multicast_list(struct net_device *net)
{
}
-
-static const struct net_device_ops device_ops = {
- .ndo_open = netvsc_open,
- .ndo_stop = netvsc_close,
- .ndo_start_xmit = netvsc_start_xmit,
- .ndo_get_stats = netvsc_get_stats,
- .ndo_set_multicast_list = netvsc_set_multicast_list,
-};
-
-/*++
-
-Name: netvsc_probe()
-
-Desc: Add the specified new device to this driver
-
---*/
-static int netvsc_probe(struct device *device)
-{
- int ret=0;
-
- struct driver_context *driver_ctx = driver_to_driver_context(device->driver);
- struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
- NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
-
- struct device_context *device_ctx = device_to_device_context(device);
- DEVICE_OBJECT *device_obj = &device_ctx->device_obj;
-
- struct net_device *net = NULL;
- struct net_device_context *net_device_ctx;
- NETVSC_DEVICE_INFO device_info;
-
- DPRINT_ENTER(NETVSC_DRV);
-
- if (!net_drv_obj->Base.OnDeviceAdd)
- {
- return -1;
- }
-
- net = alloc_netdev(sizeof(struct net_device_context), "seth%d", ether_setup);
- //net = alloc_etherdev(sizeof(struct net_device_context));
- if (!net)
- {
- return -1;
- }
-
- // Set initial state
- netif_carrier_off(net);
- netif_stop_queue(net);
-
- net_device_ctx = netdev_priv(net);
- net_device_ctx->device_ctx = device_ctx;
- dev_set_drvdata(device, net);
-
- // Notify the netvsc driver of the new device
- ret = net_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info);
- if (ret != 0)
- {
- free_netdev(net);
- dev_set_drvdata(device, NULL);
-
- DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", ret);
- return ret;
- }
-
- // If carrier is still off ie we did not get a link status callback, update it if necessary
- // FIXME: We should use a atomic or test/set instead to avoid getting out of sync with the device's link status
- if (!netif_carrier_ok(net))
- {
- if (!device_info.LinkState)
- {
- netif_carrier_on(net);
- }
- }
-
- memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN);
-
- net->netdev_ops = &device_ops;
-
- SET_NETDEV_DEV(net, device);
-
- ret = register_netdev(net);
- if (ret != 0)
- {
- // Remove the device and release the resource
- net_drv_obj->Base.OnDeviceRemove(device_obj);
- free_netdev(net);
- }
-
- DPRINT_EXIT(NETVSC_DRV);
-
- return ret;
-}
-
-static int netvsc_remove(struct device *device)
-{
- int ret=0;
- struct driver_context *driver_ctx = driver_to_driver_context(device->driver);
- struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
- NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
-
- struct device_context *device_ctx = device_to_device_context(device);
- struct net_device *net = dev_get_drvdata(&device_ctx->device);
- DEVICE_OBJECT *device_obj = &device_ctx->device_obj;
-
- DPRINT_ENTER(NETVSC_DRV);
-
- if (net == NULL)
- {
- DPRINT_INFO(NETVSC, "no net device to remove");
- DPRINT_EXIT(NETVSC_DRV);
- return 0;
- }
-
- if (!net_drv_obj->Base.OnDeviceRemove)
- {
- DPRINT_EXIT(NETVSC_DRV);
- return -1;
- }
-
- // Stop outbound asap
- netif_stop_queue(net);
- //netif_carrier_off(net);
-
- unregister_netdev(net);
-
- // Call to the vsc driver to let it know that the device is being removed
- ret = net_drv_obj->Base.OnDeviceRemove(device_obj);
- if (ret != 0)
- {
- // TODO:
- DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret);
- }
-
- free_netdev(net);
-
- DPRINT_EXIT(NETVSC_DRV);
-
- return ret;
-}
-
-/*++
-
-Name: netvsc_open()
-
-Desc: Open the specified interface device
-
---*/
static int netvsc_open(struct net_device *net)
{
- int ret=0;
struct net_device_context *net_device_ctx = netdev_priv(net);
- struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
- struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
- NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
-
- DEVICE_OBJECT *device_obj = &net_device_ctx->device_ctx->device_obj;
+ struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj;
+ int ret = 0;
DPRINT_ENTER(NETVSC_DRV);
- if (netif_carrier_ok(net))
- {
- memset(&net_device_ctx->stats, 0 , sizeof(struct net_device_stats));
+ if (netif_carrier_ok(net)) {
+ memset(&net_device_ctx->stats, 0,
+ sizeof(struct net_device_stats));
- // Open up the device
- ret = net_drv_obj->OnOpen(device_obj);
- if (ret != 0)
- {
- DPRINT_ERR(NETVSC_DRV, "unable to open device (ret %d).", ret);
+ /* Open up the device */
+ ret = RndisFilterOnOpen(device_obj);
+ if (ret != 0) {
+ DPRINT_ERR(NETVSC_DRV,
+ "unable to open device (ret %d).", ret);
return ret;
}
netif_start_queue(net);
- }
- else
- {
+ } else {
DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down.");
}
return ret;
}
-/*++
-
-Name: netvsc_close()
-
-Desc: Close the specified interface device
-
---*/
static int netvsc_close(struct net_device *net)
{
- int ret=0;
struct net_device_context *net_device_ctx = netdev_priv(net);
- struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
- struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
- NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
-
- DEVICE_OBJECT *device_obj = &net_device_ctx->device_ctx->device_obj;
+ struct hv_device *device_obj = &net_device_ctx->device_ctx->device_obj;
+ int ret;
DPRINT_ENTER(NETVSC_DRV);
netif_stop_queue(net);
- ret = net_drv_obj->OnClose(device_obj);
+ ret = RndisFilterOnClose(device_obj);
if (ret != 0)
- {
DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret);
- }
DPRINT_EXIT(NETVSC_DRV);
return ret;
}
-
-/*++
-
-Name: netvsc_xmit_completion()
-
-Desc: Send completion processing
-
---*/
static void netvsc_xmit_completion(void *context)
{
- NETVSC_PACKET *packet = (NETVSC_PACKET *)context;
- struct sk_buff *skb = (struct sk_buff *)(unsigned long)packet->Completion.Send.SendCompletionTid;
- struct net_device* net;
+ struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context;
+ struct sk_buff *skb = (struct sk_buff *)
+ (unsigned long)packet->Completion.Send.SendCompletionTid;
+ struct net_device *net;
DPRINT_ENTER(NETVSC_DRV);
kfree(packet);
- if (skb)
- {
+ if (skb) {
net = skb->dev;
-
dev_kfree_skb_any(skb);
- if (netif_queue_stopped(net))
- {
- DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", net);
+ if (netif_queue_stopped(net)) {
+ DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...",
+ net);
netif_wake_queue(net);
}
DPRINT_EXIT(NETVSC_DRV);
}
-/*++
-
-Name: netvsc_start_xmit()
-
-Desc: Start a send
-
---*/
-static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net)
+static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
{
- int ret=0;
struct net_device_context *net_device_ctx = netdev_priv(net);
- struct driver_context *driver_ctx = driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
- struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx;
- NETVSC_DRIVER_OBJECT *net_drv_obj = &net_drv_ctx->drv_obj;
-
- int i=0;
- NETVSC_PACKET* packet;
+ struct driver_context *driver_ctx =
+ driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
+ struct netvsc_driver_context *net_drv_ctx =
+ (struct netvsc_driver_context *)driver_ctx;
+ struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
+ struct hv_netvsc_packet *packet;
+ int i;
+ int ret;
int num_frags;
- int retries=0;
+ int retries = 0;
DPRINT_ENTER(NETVSC_DRV);
- // Support only 1 chain of frags
+ /* Support only 1 chain of frags */
ASSERT(skb_shinfo(skb)->frag_list == NULL);
ASSERT(skb->dev == net);
- DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d", skb->len, skb->data_len);
+ DPRINT_DBG(NETVSC_DRV, "xmit packet - len %d data_len %d",
+ skb->len, skb->data_len);
- // Add 1 for skb->data and any additional ones requested
- num_frags = skb_shinfo(skb)->nr_frags + 1 + net_drv_obj->AdditionalRequestPageBufferCount;
+ /* Add 1 for skb->data and any additional ones requested */
+ num_frags = skb_shinfo(skb)->nr_frags + 1 +
+ net_drv_obj->AdditionalRequestPageBufferCount;
- // Allocate a netvsc packet based on # of frags.
- packet = kzalloc(sizeof(NETVSC_PACKET) + (num_frags * sizeof(PAGE_BUFFER)) + net_drv_obj->RequestExtSize, GFP_ATOMIC);
- if (!packet)
- {
- DPRINT_ERR(NETVSC_DRV, "unable to allocate NETVSC_PACKET");
+ /* Allocate a netvsc packet based on # of frags. */
+ packet = kzalloc(sizeof(struct hv_netvsc_packet) +
+ (num_frags * sizeof(struct hv_page_buffer)) +
+ net_drv_obj->RequestExtSize, GFP_ATOMIC);
+ if (!packet) {
+ DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet");
return -1;
}
- packet->Extension = (void*)(unsigned long)packet + sizeof(NETVSC_PACKET) + (num_frags * sizeof(PAGE_BUFFER)) ;
+ packet->Extension = (void *)(unsigned long)packet +
+ sizeof(struct hv_netvsc_packet) +
+ (num_frags * sizeof(struct hv_page_buffer));
- // Setup the rndis header
+ /* Setup the rndis header */
packet->PageBufferCount = num_frags;
- // TODO: Flush all write buffers/ memory fence ???
- //wmb();
+ /* TODO: Flush all write buffers/ memory fence ??? */
+ /* wmb(); */
- // Initialize it from the skb
+ /* Initialize it from the skb */
ASSERT(skb->data);
packet->TotalDataBufferLength = skb->len;
- // Start filling in the page buffers starting at AdditionalRequestPageBufferCount offset
- packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT;
- packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE -1);
- packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len;
+ /*
+ * Start filling in the page buffers starting at
+ * AdditionalRequestPageBufferCount offset
+ */
+ packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Pfn = virt_to_phys(skb->data) >> PAGE_SHIFT;
+ packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE - 1);
+ packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len;
ASSERT((skb->len - skb->data_len) <= PAGE_SIZE);
- for (i=net_drv_obj->AdditionalRequestPageBufferCount+1; i<num_frags; i++)
- {
- packet->PageBuffers[i].Pfn = page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page);
- packet->PageBuffers[i].Offset = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset;
- packet->PageBuffers[i].Length = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size;
+ for (i = net_drv_obj->AdditionalRequestPageBufferCount + 1;
+ i < num_frags; i++) {
+ packet->PageBuffers[i].Pfn =
+ page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page);
+ packet->PageBuffers[i].Offset =
+ skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset;
+ packet->PageBuffers[i].Length =
+ skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size;
}
- // Set the completion routine
+ /* Set the completion routine */
packet->Completion.Send.OnSendCompletion = netvsc_xmit_completion;
packet->Completion.Send.SendCompletionContext = packet;
packet->Completion.Send.SendCompletionTid = (unsigned long)skb;
retry_send:
- ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj, packet);
+ ret = net_drv_obj->OnSend(&net_device_ctx->device_ctx->device_obj,
+ packet);
- if (ret == 0)
- {
+ if (ret == 0) {
ret = NETDEV_TX_OK;
net_device_ctx->stats.tx_bytes += skb->len;
net_device_ctx->stats.tx_packets++;
- }
- else
- {
+ } else {
retries++;
- if (retries < 4)
- {
- DPRINT_ERR(NETVSC_DRV, "unable to send...retrying %d...", retries);
+ if (retries < 4) {
+ DPRINT_ERR(NETVSC_DRV, "unable to send..."
+ "retrying %d...", retries);
udelay(100);
goto retry_send;
}
- // no more room or we are shutting down
- DPRINT_ERR(NETVSC_DRV, "unable to send (%d)...marking net device (%p) busy", ret, net);
+ /* no more room or we are shutting down */
+ DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..."
+ "marking net device (%p) busy", ret, net);
DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net);
ret = NETDEV_TX_BUSY;
netif_stop_queue(net);
- // Null it since the caller will free it instead of the completion routine
+ /*
+ * Null it since the caller will free it instead of the
+ * completion routine
+ */
packet->Completion.Send.SendCompletionTid = 0;
- // Release the resources since we will not get any send completion
- netvsc_xmit_completion((void*)packet);
+ /*
+ * Release the resources since we will not get any send
+ * completion
+ */
+ netvsc_xmit_completion((void *)packet);
}
- DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu", net_device_ctx->stats.tx_packets, net_device_ctx->stats.tx_bytes);
+ DPRINT_DBG(NETVSC_DRV, "# of xmits %lu total size %lu",
+ net_device_ctx->stats.tx_packets,
+ net_device_ctx->stats.tx_bytes);
DPRINT_EXIT(NETVSC_DRV);
return ret;
}
-
-/*++
-
-Name: netvsc_linkstatus_callback()
-
-Desc: Link up/down notification
-
---*/
-static void netvsc_linkstatus_callback(DEVICE_OBJECT *device_obj, unsigned int status)
+/**
+ * netvsc_linkstatus_callback - Link up/down notification
+ */
+static void netvsc_linkstatus_callback(struct hv_device *device_obj,
+ unsigned int status)
{
- struct device_context* device_ctx = to_device_context(device_obj);
- struct net_device* net = dev_get_drvdata(&device_ctx->device);
+ struct vm_device *device_ctx = to_vm_device(device_obj);
+ struct net_device *net = dev_get_drvdata(&device_ctx->device);
DPRINT_ENTER(NETVSC_DRV);
- if (!net)
- {
- DPRINT_ERR(NETVSC_DRV, "got link status but net device not initialized yet");
+ if (!net) {
+ DPRINT_ERR(NETVSC_DRV, "got link status but net device "
+ "not initialized yet");
return;
}
- if (status == 1)
- {
+ if (status == 1) {
netif_carrier_on(net);
netif_wake_queue(net);
- }
- else
- {
+ } else {
netif_carrier_off(net);
netif_stop_queue(net);
}
DPRINT_EXIT(NETVSC_DRV);
}
-
-/*++
-
-Name: netvsc_recv_callback()
-
-Desc: Callback when we receive a packet from the "wire" on the specify device
-
---*/
-static int netvsc_recv_callback(DEVICE_OBJECT *device_obj, NETVSC_PACKET* packet)
+/**
+ * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device.
+ */
+static int netvsc_recv_callback(struct hv_device *device_obj,
+ struct hv_netvsc_packet *packet)
{
- int ret=0;
- struct device_context *device_ctx = to_device_context(device_obj);
+ struct vm_device *device_ctx = to_vm_device(device_obj);
struct net_device *net = dev_get_drvdata(&device_ctx->device);
struct net_device_context *net_device_ctx;
-
struct sk_buff *skb;
void *data;
- int i=0;
+ int ret;
+ int i;
unsigned long flags;
DPRINT_ENTER(NETVSC_DRV);
- if (!net)
- {
- DPRINT_ERR(NETVSC_DRV, "got receive callback but net device not initialized yet");
+ if (!net) {
+ DPRINT_ERR(NETVSC_DRV, "got receive callback but net device "
+ "not initialized yet");
return 0;
}
net_device_ctx = netdev_priv(net);
- // Allocate a skb - TODO preallocate this
- //skb = alloc_skb(packet->TotalDataBufferLength, GFP_ATOMIC);
- skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); // Pad 2-bytes to align IP header to 16 bytes
+ /* Allocate a skb - TODO preallocate this */
+ /* Pad 2-bytes to align IP header to 16 bytes */
+ skb = dev_alloc_skb(packet->TotalDataBufferLength + 2);
ASSERT(skb);
skb_reserve(skb, 2);
skb->dev = net;
- // for kmap_atomic
+ /* for kmap_atomic */
local_irq_save(flags);
- // Copy to skb. This copy is needed here since the memory pointed by NETVSC_PACKET
- // cannot be deallocated
- for (i=0; i<packet->PageBufferCount; i++)
- {
- data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), KM_IRQ1);
- data = (void*)(unsigned long)data + packet->PageBuffers[i].Offset;
-
- memcpy(skb_put(skb, packet->PageBuffers[i].Length), data, packet->PageBuffers[i].Length);
-
- kunmap_atomic((void*)((unsigned long)data - packet->PageBuffers[i].Offset), KM_IRQ1);
+ /*
+ * Copy to skb. This copy is needed here since the memory pointed by
+ * hv_netvsc_packet cannot be deallocated
+ */
+ for (i = 0; i < packet->PageBufferCount; i++) {
+ data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn),
+ KM_IRQ1);
+ data = (void *)(unsigned long)data +
+ packet->PageBuffers[i].Offset;
+
+ memcpy(skb_put(skb, packet->PageBuffers[i].Length), data,
+ packet->PageBuffers[i].Length);
+
+ kunmap_atomic((void *)((unsigned long)data -
+ packet->PageBuffers[i].Offset), KM_IRQ1);
}
local_irq_restore(flags);
skb->ip_summed = CHECKSUM_NONE;
- // Pass the skb back up. Network stack will deallocate the skb when it is done
+ /*
+ * Pass the skb back up. Network stack will deallocate the skb when it
+ * is done
+ */
ret = netif_rx(skb);
- switch (ret)
- {
+ switch (ret) {
case NET_RX_DROP:
net_device_ctx->stats.rx_dropped++;
break;
break;
}
- DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu", net_device_ctx->stats.rx_packets, net_device_ctx->stats.rx_bytes);
+ DPRINT_DBG(NETVSC_DRV, "# of recvs %lu total size %lu",
+ net_device_ctx->stats.rx_packets,
+ net_device_ctx->stats.rx_bytes);
DPRINT_EXIT(NETVSC_DRV);
return 0;
}
-static int netvsc_drv_exit_cb(struct device *dev, void *data)
+static const struct net_device_ops device_ops = {
+ .ndo_open = netvsc_open,
+ .ndo_stop = netvsc_close,
+ .ndo_start_xmit = netvsc_start_xmit,
+ .ndo_get_stats = netvsc_get_stats,
+ .ndo_set_multicast_list = netvsc_set_multicast_list,
+};
+
+static int netvsc_probe(struct device *device)
{
- struct device **curr = (struct device **)data;
- *curr = dev;
- return 1; // stop iterating
+ struct driver_context *driver_ctx =
+ driver_to_driver_context(device->driver);
+ struct netvsc_driver_context *net_drv_ctx =
+ (struct netvsc_driver_context *)driver_ctx;
+ struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
+ struct vm_device *device_ctx = device_to_vm_device(device);
+ struct hv_device *device_obj = &device_ctx->device_obj;
+ struct net_device *net = NULL;
+ struct net_device_context *net_device_ctx;
+ struct netvsc_device_info device_info;
+ int ret;
+
+ DPRINT_ENTER(NETVSC_DRV);
+
+ if (!net_drv_obj->Base.OnDeviceAdd)
+ return -1;
+
+ net = alloc_etherdev(sizeof(struct net_device_context));
+ if (!net)
+ return -1;
+
+ /* Set initial state */
+ netif_carrier_off(net);
+ netif_stop_queue(net);
+
+ net_device_ctx = netdev_priv(net);
+ net_device_ctx->device_ctx = device_ctx;
+ dev_set_drvdata(device, net);
+
+ /* Notify the netvsc driver of the new device */
+ ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info);
+ if (ret != 0) {
+ free_netdev(net);
+ dev_set_drvdata(device, NULL);
+
+ DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)",
+ ret);
+ return ret;
+ }
+
+ /*
+ * If carrier is still off ie we did not get a link status callback,
+ * update it if necessary
+ */
+ /*
+ * FIXME: We should use a atomic or test/set instead to avoid getting
+ * out of sync with the device's link status
+ */
+ if (!netif_carrier_ok(net))
+ if (!device_info.LinkState)
+ netif_carrier_on(net);
+
+ memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN);
+
+ net->netdev_ops = &device_ops;
+
+ SET_NETDEV_DEV(net, device);
+
+ ret = register_netdev(net);
+ if (ret != 0) {
+ /* Remove the device and release the resource */
+ net_drv_obj->Base.OnDeviceRemove(device_obj);
+ free_netdev(net);
+ }
+
+ DPRINT_EXIT(NETVSC_DRV);
+ return ret;
}
-/*++
+static int netvsc_remove(struct device *device)
+{
+ struct driver_context *driver_ctx =
+ driver_to_driver_context(device->driver);
+ struct netvsc_driver_context *net_drv_ctx =
+ (struct netvsc_driver_context *)driver_ctx;
+ struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
+ struct vm_device *device_ctx = device_to_vm_device(device);
+ struct net_device *net = dev_get_drvdata(&device_ctx->device);
+ struct hv_device *device_obj = &device_ctx->device_obj;
+ int ret;
-Name: netvsc_drv_exit()
+ DPRINT_ENTER(NETVSC_DRV);
-Desc:
+ if (net == NULL) {
+ DPRINT_INFO(NETVSC, "no net device to remove");
+ DPRINT_EXIT(NETVSC_DRV);
+ return 0;
+ }
+
+ if (!net_drv_obj->Base.OnDeviceRemove) {
+ DPRINT_EXIT(NETVSC_DRV);
+ return -1;
+ }
+
+ /* Stop outbound asap */
+ netif_stop_queue(net);
+ /* netif_carrier_off(net); */
+
+ unregister_netdev(net);
+
+ /*
+ * Call to the vsc driver to let it know that the device is being
+ * removed
+ */
+ ret = net_drv_obj->Base.OnDeviceRemove(device_obj);
+ if (ret != 0) {
+ /* TODO: */
+ DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret);
+ }
+
+ free_netdev(net);
+ DPRINT_EXIT(NETVSC_DRV);
+ return ret;
+}
---*/
-void netvsc_drv_exit(void)
+static int netvsc_drv_exit_cb(struct device *dev, void *data)
{
- NETVSC_DRIVER_OBJECT *netvsc_drv_obj=&g_netvsc_drv.drv_obj;
- struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx;
+ struct device **curr = (struct device **)data;
- struct device *current_dev=NULL;
+ *curr = dev;
+ /* stop iterating */
+ return 1;
+}
+
+static void netvsc_drv_exit(void)
+{
+ struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj;
+ struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
+ struct device *current_dev;
+ int ret;
DPRINT_ENTER(NETVSC_DRV);
- while (1)
- {
+ while (1) {
current_dev = NULL;
- // Get the device
- driver_for_each_device(&drv_ctx->driver, NULL, (void*)¤t_dev, netvsc_drv_exit_cb);
+ /* 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);
+ /* Initiate removal from the top-down */
+ DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...",
+ current_dev);
device_unregister(current_dev);
}
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 = netvsc_ringbuffer_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 int __init netvsc_init(void)
{
int ret;
static void __exit netvsc_exit(void)
{
DPRINT_ENTER(NETVSC_DRV);
-
netvsc_drv_exit();
-
DPRINT_EXIT(NETVSC_DRV);
}
+MODULE_LICENSE("GPL");
+MODULE_VERSION(HV_DRV_VERSION);
module_param(netvsc_ringbuffer_size, int, S_IRUGO);
module_init(netvsc_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff