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Staging: hv: coding style cleanups for netvsc_drv.c

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There are still some horrible long lines in here, which some simple
code reworking will make smaller and easier to understand.

Also note the FIXME in struct netvsc_driver_context...

Cc: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-08-31 21:09:45 -07:00
parent 0831ad041f
commit 02fafbc619
1 changed files with 184 additions and 260 deletions
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444
drivers/staging/hv/netvsc_drv.c
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@ -1,5 +1,4 @@
/* /*
*
* Copyright (c) 2009, Microsoft Corporation. * Copyright (c) 2009, Microsoft Corporation.
* *
* This program is free software; you can redistribute it and/or modify it * This program is free software; you can redistribute it and/or modify it
@ -17,9 +16,7 @@
* *
* Authors: * Authors:
* Hank Janssen <hjanssen@microsoft.com> * Hank Janssen <hjanssen@microsoft.com>
*
*/ */
#include <linux/init.h> #include <linux/init.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/highmem.h> #include <linux/highmem.h>
@ -35,68 +32,49 @@
#include <net/route.h> #include <net/route.h>
#include <net/sock.h> #include <net/sock.h>
#include <net/pkt_sched.h> #include <net/pkt_sched.h>
#include "osd.h" #include "osd.h"
#include "logging.h" #include "logging.h"
#include "vmbus.h" #include "vmbus.h"
#include "NetVscApi.h" #include "NetVscApi.h"
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
/* Static decl */
static int netvsc_probe(struct device *device); static int netvsc_probe(struct device *device);
static int netvsc_remove(struct device *device); static int netvsc_remove(struct device *device);
static int netvsc_open(struct net_device *net); static int netvsc_open(struct net_device *net);
static void netvsc_xmit_completion(void *context); static void netvsc_xmit_completion(void *context);
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);
static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_packet *Packet); static int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *Packet);
static int netvsc_close(struct net_device *net); static int netvsc_close(struct net_device *net);
static struct net_device_stats *netvsc_get_stats(struct net_device *net); static struct net_device_stats *netvsc_get_stats(struct net_device *net);
static void netvsc_linkstatus_callback(struct hv_device *device_obj, unsigned int status); static void netvsc_linkstatus_callback(struct hv_device *device_obj,
unsigned int status);
/* Data types */
struct net_device_context { struct net_device_context {
struct device_context *device_ctx; /* point back to our device context */ /* point back to our device context */
struct device_context *device_ctx;
struct net_device_stats stats; struct net_device_stats stats;
}; };
struct netvsc_driver_context { struct netvsc_driver_context {
/* !! These must be the first 2 fields !! */ /* !! These must be the first 2 fields !! */
/* Which is a bug FIXME! */ /* Which is a bug FIXME! */
struct driver_context drv_ctx; struct driver_context drv_ctx;
struct netvsc_driver drv_obj; struct netvsc_driver drv_obj;
}; };
/* Globals */
static int netvsc_ringbuffer_size = NETVSC_DEVICE_RING_BUFFER_SIZE; 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; static struct netvsc_driver_context g_netvsc_drv;
/* Routines */
/*++
Name: netvsc_drv_init()
Desc: NetVsc driver initialization
--*/
static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init) static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
{ {
int ret=0; struct netvsc_driver *net_drv_obj = &g_netvsc_drv.drv_obj;
struct netvsc_driver *net_drv_obj=&g_netvsc_drv.drv_obj; struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx; int ret;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
@ -110,7 +88,8 @@ static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
pfn_drv_init(&net_drv_obj->Base); pfn_drv_init(&net_drv_obj->Base);
drv_ctx->driver.name = net_drv_obj->Base.name; drv_ctx->driver.name = net_drv_obj->Base.name;
memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType, sizeof(struct hv_guid)); memcpy(&drv_ctx->class_id, &net_drv_obj->Base.deviceType,
sizeof(struct hv_guid));
drv_ctx->probe = netvsc_probe; drv_ctx->probe = netvsc_probe;
drv_ctx->remove = netvsc_remove; drv_ctx->remove = netvsc_remove;
@ -123,13 +102,6 @@ static int netvsc_drv_init(PFN_DRIVERINITIALIZE pfn_drv_init)
return ret; return ret;
} }
/*++
Name: netvsc_get_stats()
Desc: Get the network stats
--*/
static struct net_device_stats *netvsc_get_stats(struct net_device *net) static struct net_device_stats *netvsc_get_stats(struct net_device *net)
{ {
struct net_device_context *net_device_ctx = netdev_priv(net); struct net_device_context *net_device_ctx = netdev_priv(net);
@ -137,62 +109,41 @@ static struct net_device_stats *netvsc_get_stats(struct net_device *net)
return &net_device_ctx->stats; 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 void netvsc_set_multicast_list(struct net_device *net)
{ {
} }
static const struct net_device_ops device_ops = { static const struct net_device_ops device_ops = {
.ndo_open = netvsc_open, .ndo_open = netvsc_open,
.ndo_stop = netvsc_close, .ndo_stop = netvsc_close,
.ndo_start_xmit = netvsc_start_xmit, .ndo_start_xmit = netvsc_start_xmit,
.ndo_get_stats = netvsc_get_stats, .ndo_get_stats = netvsc_get_stats,
.ndo_set_multicast_list = netvsc_set_multicast_list, .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) static int netvsc_probe(struct device *device)
{ {
int ret=0; struct driver_context *driver_ctx =
driver_to_driver_context(device->driver);
struct driver_context *driver_ctx = driver_to_driver_context(device->driver); struct netvsc_driver_context *net_drv_ctx =
struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; (struct netvsc_driver_context *)driver_ctx;
struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj; struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct device_context *device_ctx = device_to_device_context(device); struct device_context *device_ctx = device_to_device_context(device);
struct hv_device *device_obj = &device_ctx->device_obj; struct hv_device *device_obj = &device_ctx->device_obj;
struct net_device *net = NULL; struct net_device *net = NULL;
struct net_device_context *net_device_ctx; struct net_device_context *net_device_ctx;
struct netvsc_device_info device_info; struct netvsc_device_info device_info;
int ret;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
if (!net_drv_obj->Base.OnDeviceAdd) if (!net_drv_obj->Base.OnDeviceAdd)
{
return -1; return -1;
}
net = alloc_netdev(sizeof(struct net_device_context), "seth%d", ether_setup); net = alloc_netdev(sizeof(struct net_device_context), "seth%d",
/* net = alloc_etherdev(sizeof(struct net_device_context)); */ ether_setup);
if (!net) if (!net)
{
return -1; return -1;
}
/* Set initial state */ /* Set initial state */
netif_carrier_off(net); netif_carrier_off(net);
@ -203,25 +154,27 @@ static int netvsc_probe(struct device *device)
dev_set_drvdata(device, net); dev_set_drvdata(device, net);
/* Notify the netvsc driver of the new device */ /* Notify the netvsc driver of the new device */
ret = net_drv_obj->Base.OnDeviceAdd(device_obj, (void*)&device_info); ret = net_drv_obj->Base.OnDeviceAdd(device_obj, &device_info);
if (ret != 0) if (ret != 0) {
{
free_netdev(net); free_netdev(net);
dev_set_drvdata(device, NULL); dev_set_drvdata(device, NULL);
DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)", ret); DPRINT_ERR(NETVSC_DRV, "unable to add netvsc device (ret %d)",
ret);
return 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 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 (!netif_carrier_ok(net))
{
if (!device_info.LinkState) if (!device_info.LinkState)
{
netif_carrier_on(net); netif_carrier_on(net);
}
}
memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN); memcpy(net->dev_addr, device_info.MacAddr, ETH_ALEN);
@ -230,40 +183,37 @@ static int netvsc_probe(struct device *device)
SET_NETDEV_DEV(net, device); SET_NETDEV_DEV(net, device);
ret = register_netdev(net); ret = register_netdev(net);
if (ret != 0) if (ret != 0) {
{
/* Remove the device and release the resource */ /* Remove the device and release the resource */
net_drv_obj->Base.OnDeviceRemove(device_obj); net_drv_obj->Base.OnDeviceRemove(device_obj);
free_netdev(net); free_netdev(net);
} }
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
return ret; return ret;
} }
static int netvsc_remove(struct device *device) static int netvsc_remove(struct device *device)
{ {
int ret=0; struct driver_context *driver_ctx =
struct driver_context *driver_ctx = driver_to_driver_context(device->driver); driver_to_driver_context(device->driver);
struct netvsc_driver_context *net_drv_ctx = (struct netvsc_driver_context*)driver_ctx; 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 netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct device_context *device_ctx = device_to_device_context(device); struct device_context *device_ctx = device_to_device_context(device);
struct net_device *net = dev_get_drvdata(&device_ctx->device); struct net_device *net = dev_get_drvdata(&device_ctx->device);
struct hv_device *device_obj = &device_ctx->device_obj; struct hv_device *device_obj = &device_ctx->device_obj;
int ret;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
if (net == NULL) if (net == NULL) {
{
DPRINT_INFO(NETVSC, "no net device to remove"); DPRINT_INFO(NETVSC, "no net device to remove");
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
return 0; return 0;
} }
if (!net_drv_obj->Base.OnDeviceRemove) if (!net_drv_obj->Base.OnDeviceRemove) {
{
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
return -1; return -1;
} }
@ -274,56 +224,48 @@ static int netvsc_remove(struct device *device)
unregister_netdev(net); unregister_netdev(net);
/* Call to the vsc driver to let it know that the device is being removed */ /*
* Call to the vsc driver to let it know that the device is being
* removed
*/
ret = net_drv_obj->Base.OnDeviceRemove(device_obj); ret = net_drv_obj->Base.OnDeviceRemove(device_obj);
if (ret != 0) if (ret != 0) {
{
/* TODO: */ /* TODO: */
DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret); DPRINT_ERR(NETVSC, "unable to remove vsc device (ret %d)", ret);
} }
free_netdev(net); free_netdev(net);
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
return ret; return ret;
} }
/*++
Name: netvsc_open()
Desc: Open the specified interface device
--*/
static int netvsc_open(struct net_device *net) static int netvsc_open(struct net_device *net)
{ {
int ret=0;
struct net_device_context *net_device_ctx = netdev_priv(net); 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 driver_context *driver_ctx =
struct netvsc_driver_context *net_drv_ctx = (struct netvsc_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 netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct hv_device *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); DPRINT_ENTER(NETVSC_DRV);
if (netif_carrier_ok(net)) if (netif_carrier_ok(net)) {
{ memset(&net_device_ctx->stats, 0,
memset(&net_device_ctx->stats, 0 , sizeof(struct net_device_stats)); sizeof(struct net_device_stats));
/* Open up the device */ /* Open up the device */
ret = net_drv_obj->OnOpen(device_obj); ret = net_drv_obj->OnOpen(device_obj);
if (ret != 0) if (ret != 0) {
{ DPRINT_ERR(NETVSC_DRV,
DPRINT_ERR(NETVSC_DRV, "unable to open device (ret %d).", ret); "unable to open device (ret %d).", ret);
return ret; return ret;
} }
netif_start_queue(net); netif_start_queue(net);
} } else {
else
{
DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down."); DPRINT_ERR(NETVSC_DRV, "unable to open device...link is down.");
} }
@ -331,22 +273,16 @@ static int netvsc_open(struct net_device *net)
return ret; return ret;
} }
/*++
Name: netvsc_close()
Desc: Close the specified interface device
--*/
static int netvsc_close(struct net_device *net) static int netvsc_close(struct net_device *net)
{ {
int ret=0;
struct net_device_context *net_device_ctx = netdev_priv(net); 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 driver_context *driver_ctx =
struct netvsc_driver_context *net_drv_ctx = (struct netvsc_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 netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
struct hv_device *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); DPRINT_ENTER(NETVSC_DRV);
@ -354,42 +290,31 @@ static int netvsc_close(struct net_device *net)
ret = net_drv_obj->OnClose(device_obj); ret = net_drv_obj->OnClose(device_obj);
if (ret != 0) if (ret != 0)
{
DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret); DPRINT_ERR(NETVSC_DRV, "unable to close device (ret %d).", ret);
}
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
return ret; return ret;
} }
/*++
Name: netvsc_xmit_completion()
Desc: Send completion processing
--*/
static void netvsc_xmit_completion(void *context) static void netvsc_xmit_completion(void *context)
{ {
struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context; struct hv_netvsc_packet *packet = (struct hv_netvsc_packet *)context;
struct sk_buff *skb = (struct sk_buff *)(unsigned long)packet->Completion.Send.SendCompletionTid; struct sk_buff *skb = (struct sk_buff *)
struct net_device* net; (unsigned long)packet->Completion.Send.SendCompletionTid;
struct net_device *net;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
kfree(packet); kfree(packet);
if (skb) if (skb) {
{
net = skb->dev; net = skb->dev;
dev_kfree_skb_any(skb); dev_kfree_skb_any(skb);
if (netif_queue_stopped(net)) if (netif_queue_stopped(net)) {
{ DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...",
DPRINT_INFO(NETVSC_DRV, "net device (%p) waking up...", net); net);
netif_wake_queue(net); netif_wake_queue(net);
} }
@ -398,25 +323,19 @@ static void netvsc_xmit_completion(void *context)
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
} }
/*++ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
Name: netvsc_start_xmit()
Desc: Start a send
--*/
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 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 driver_context *driver_ctx =
struct netvsc_driver_context *net_drv_ctx = (struct netvsc_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 netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
int i=0;
struct hv_netvsc_packet *packet; struct hv_netvsc_packet *packet;
int i;
int ret;
int num_frags; int num_frags;
int retries=0; int retries = 0;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
@ -424,20 +343,25 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net)
ASSERT(skb_shinfo(skb)->frag_list == NULL); ASSERT(skb_shinfo(skb)->frag_list == NULL);
ASSERT(skb->dev == net); 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 */ /* Add 1 for skb->data and any additional ones requested */
num_frags = skb_shinfo(skb)->nr_frags + 1 + net_drv_obj->AdditionalRequestPageBufferCount; num_frags = skb_shinfo(skb)->nr_frags + 1 +
net_drv_obj->AdditionalRequestPageBufferCount;
/* Allocate a netvsc packet based on # of frags. */ /* 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); packet = kzalloc(sizeof(struct hv_netvsc_packet) +
if (!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"); DPRINT_ERR(NETVSC_DRV, "unable to allocate hv_netvsc_packet");
return -1; return -1;
} }
packet->Extension = (void*)(unsigned long)packet + sizeof(struct hv_netvsc_packet) + (num_frags * sizeof(struct hv_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; packet->PageBufferCount = num_frags;
@ -449,18 +373,24 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net)
ASSERT(skb->data); ASSERT(skb->data);
packet->TotalDataBufferLength = skb->len; 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; * Start filling in the page buffers starting at
packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Offset = (unsigned long)skb->data & (PAGE_SIZE -1); * AdditionalRequestPageBufferCount offset
packet->PageBuffers[net_drv_obj->AdditionalRequestPageBufferCount].Length = skb->len - skb->data_len; */
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); ASSERT((skb->len - skb->data_len) <= PAGE_SIZE);
for (i=net_drv_obj->AdditionalRequestPageBufferCount+1; i<num_frags; i++) 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].Pfn =
packet->PageBuffers[i].Offset = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page_offset; page_to_pfn(skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].page);
packet->PageBuffers[i].Length = skb_shinfo(skb)->frags[i-(net_drv_obj->AdditionalRequestPageBufferCount+1)].size; 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 */
@ -469,26 +399,25 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net)
packet->Completion.Send.SendCompletionTid = (unsigned long)skb; packet->Completion.Send.SendCompletionTid = (unsigned long)skb;
retry_send: 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; ret = NETDEV_TX_OK;
net_device_ctx->stats.tx_bytes += skb->len; net_device_ctx->stats.tx_bytes += skb->len;
net_device_ctx->stats.tx_packets++; net_device_ctx->stats.tx_packets++;
} } else {
else
{
retries++; retries++;
if (retries < 4) if (retries < 4) {
{ DPRINT_ERR(NETVSC_DRV, "unable to send..."
DPRINT_ERR(NETVSC_DRV, "unable to send...retrying %d...", retries); "retrying %d...", retries);
udelay(100); udelay(100);
goto retry_send; goto retry_send;
} }
/* no more room or we are shutting down */ /* no more room or we are shutting down */
DPRINT_ERR(NETVSC_DRV, "unable to send (%d)...marking net device (%p) busy", ret, net); DPRINT_ERR(NETVSC_DRV, "unable to send (%d)..."
"marking net device (%p) busy", ret, net);
DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net); DPRINT_INFO(NETVSC_DRV, "net device (%p) stopping", net);
ret = NETDEV_TX_BUSY; ret = NETDEV_TX_BUSY;
@ -496,86 +425,82 @@ static int netvsc_start_xmit (struct sk_buff *skb, struct net_device *net)
netif_stop_queue(net); 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; 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); DPRINT_EXIT(NETVSC_DRV);
return ret; return ret;
} }
/**
/*++ * netvsc_linkstatus_callback - Link up/down notification
*/
Name: netvsc_linkstatus_callback() static void netvsc_linkstatus_callback(struct hv_device *device_obj,
unsigned int status)
Desc: 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 device_context *device_ctx = to_device_context(device_obj);
struct net_device* net = dev_get_drvdata(&device_ctx->device); struct net_device *net = dev_get_drvdata(&device_ctx->device);
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
if (!net) if (!net) {
{ DPRINT_ERR(NETVSC_DRV, "got link status but net device "
DPRINT_ERR(NETVSC_DRV, "got link status but net device not initialized yet"); "not initialized yet");
return; return;
} }
if (status == 1) if (status == 1) {
{
netif_carrier_on(net); netif_carrier_on(net);
netif_wake_queue(net); netif_wake_queue(net);
} } else {
else
{
netif_carrier_off(net); netif_carrier_off(net);
netif_stop_queue(net); netif_stop_queue(net);
} }
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
} }
/**
/*++ * netvsc_recv_callback - Callback when we receive a packet from the "wire" on the specified device.
*/
Name: netvsc_recv_callback() static int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *packet)
Desc: Callback when we receive a packet from the "wire" on the specify 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 device_context *device_ctx = to_device_context(device_obj);
struct net_device *net = dev_get_drvdata(&device_ctx->device); struct net_device *net = dev_get_drvdata(&device_ctx->device);
struct net_device_context *net_device_ctx; struct net_device_context *net_device_ctx;
struct sk_buff *skb; struct sk_buff *skb;
void *data; void *data;
int i=0; int ret;
int i;
unsigned long flags; unsigned long flags;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
if (!net) if (!net) {
{ DPRINT_ERR(NETVSC_DRV, "got receive callback but net device "
DPRINT_ERR(NETVSC_DRV, "got receive callback but net device not initialized yet"); "not initialized yet");
return 0; return 0;
} }
net_device_ctx = netdev_priv(net); net_device_ctx = netdev_priv(net);
/* Allocate a skb - TODO preallocate this */ /* Allocate a skb - TODO preallocate this */
/* skb = alloc_skb(packet->TotalDataBufferLength, GFP_ATOMIC); */ /* Pad 2-bytes to align IP header to 16 bytes */
skb = dev_alloc_skb(packet->TotalDataBufferLength + 2); /* Pad 2-bytes to align IP header to 16 bytes */ skb = dev_alloc_skb(packet->TotalDataBufferLength + 2);
ASSERT(skb); ASSERT(skb);
skb_reserve(skb, 2); skb_reserve(skb, 2);
skb->dev = net; skb->dev = net;
@ -583,16 +508,21 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p
/* for kmap_atomic */ /* for kmap_atomic */
local_irq_save(flags); local_irq_save(flags);
/* Copy to skb. This copy is needed here since the memory pointed by hv_netvsc_packet */ /*
/* cannot be deallocated */ * Copy to skb. This copy is needed here since the memory pointed by
for (i=0; i<packet->PageBufferCount; i++) * hv_netvsc_packet cannot be deallocated
{ */
data = kmap_atomic(pfn_to_page(packet->PageBuffers[i].Pfn), KM_IRQ1); for (i = 0; i < packet->PageBufferCount; i++) {
data = (void*)(unsigned long)data + packet->PageBuffers[i].Offset; 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); 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); kunmap_atomic((void *)((unsigned long)data -
packet->PageBuffers[i].Offset), KM_IRQ1);
} }
local_irq_restore(flags); local_irq_restore(flags);
@ -601,11 +531,13 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p
skb->ip_summed = CHECKSUM_NONE; 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); ret = netif_rx(skb);
switch (ret) switch (ret) {
{
case NET_RX_DROP: case NET_RX_DROP:
net_device_ctx->stats.rx_dropped++; net_device_ctx->stats.rx_dropped++;
break; break;
@ -615,7 +547,9 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p
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); DPRINT_EXIT(NETVSC_DRV);
@ -625,45 +559,37 @@ static int netvsc_recv_callback(struct hv_device *device_obj, struct hv_netvsc_p
static int netvsc_drv_exit_cb(struct device *dev, void *data) static int netvsc_drv_exit_cb(struct device *dev, void *data)
{ {
struct device **curr = (struct device **)data; struct device **curr = (struct device **)data;
*curr = dev; *curr = dev;
return 1; /* stop iterating */ /* stop iterating */
return 1;
} }
/*++
Name: netvsc_drv_exit()
Desc:
--*/
static void netvsc_drv_exit(void) static void netvsc_drv_exit(void)
{ {
struct netvsc_driver *netvsc_drv_obj=&g_netvsc_drv.drv_obj; struct netvsc_driver *netvsc_drv_obj = &g_netvsc_drv.drv_obj;
struct driver_context *drv_ctx=&g_netvsc_drv.drv_ctx; struct driver_context *drv_ctx = &g_netvsc_drv.drv_ctx;
struct device *current_dev=NULL; struct device *current_dev;
int ret; int ret;
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
while (1) while (1) {
{
current_dev = NULL; current_dev = NULL;
/* Get the device */ /* Get the device */
ret = driver_for_each_device(&drv_ctx->driver, NULL, ret = driver_for_each_device(&drv_ctx->driver, NULL,
(void *) &current_dev, &current_dev, netvsc_drv_exit_cb);
netvsc_drv_exit_cb);
if (ret) if (ret)
DPRINT_WARN(NETVSC_DRV, DPRINT_WARN(NETVSC_DRV,
"driver_for_each_device returned %d", ret); "driver_for_each_device returned %d", ret);
if (current_dev == NULL) if (current_dev == NULL)
break; break;
/* Initiate removal from the top-down */ /* Initiate removal from the top-down */
DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...", current_dev); DPRINT_INFO(NETVSC_DRV, "unregistering device (%p)...",
current_dev);
device_unregister(current_dev); device_unregister(current_dev);
} }
@ -695,9 +621,7 @@ static int __init netvsc_init(void)
static void __exit netvsc_exit(void) static void __exit netvsc_exit(void)
{ {
DPRINT_ENTER(NETVSC_DRV); DPRINT_ENTER(NETVSC_DRV);
netvsc_drv_exit(); netvsc_drv_exit();
DPRINT_EXIT(NETVSC_DRV); DPRINT_EXIT(NETVSC_DRV);
} }