// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* IBM Power Virtual Ethernet Device Driver
|
*
|
* Copyright (C) IBM Corporation, 2003, 2010
|
*
|
* Authors: Dave Larson <larson1@us.ibm.com>
|
* Santiago Leon <santil@linux.vnet.ibm.com>
|
* Brian King <brking@linux.vnet.ibm.com>
|
* Robert Jennings <rcj@linux.vnet.ibm.com>
|
* Anton Blanchard <anton@au.ibm.com>
|
*/
|
|
#include <linux/module.h>
|
#include <linux/types.h>
|
#include <linux/errno.h>
|
#include <linux/dma-mapping.h>
|
#include <linux/kernel.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/init.h>
|
#include <linux/interrupt.h>
|
#include <linux/mm.h>
|
#include <linux/pm.h>
|
#include <linux/ethtool.h>
|
#include <linux/in.h>
|
#include <linux/ip.h>
|
#include <linux/ipv6.h>
|
#include <linux/slab.h>
|
#include <asm/hvcall.h>
|
#include <linux/atomic.h>
|
#include <asm/vio.h>
|
#include <asm/iommu.h>
|
#include <asm/firmware.h>
|
#include <net/tcp.h>
|
#include <net/ip6_checksum.h>
|
|
#include "ibmveth.h"
|
|
static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
|
static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
|
static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
|
|
static struct kobj_type ktype_veth_pool;
|
|
|
static const char ibmveth_driver_name[] = "ibmveth";
|
static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
|
#define ibmveth_driver_version "1.06"
|
|
MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>");
|
MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
|
MODULE_LICENSE("GPL");
|
MODULE_VERSION(ibmveth_driver_version);
|
|
static unsigned int tx_copybreak __read_mostly = 128;
|
module_param(tx_copybreak, uint, 0644);
|
MODULE_PARM_DESC(tx_copybreak,
|
"Maximum size of packet that is copied to a new buffer on transmit");
|
|
static unsigned int rx_copybreak __read_mostly = 128;
|
module_param(rx_copybreak, uint, 0644);
|
MODULE_PARM_DESC(rx_copybreak,
|
"Maximum size of packet that is copied to a new buffer on receive");
|
|
static unsigned int rx_flush __read_mostly = 0;
|
module_param(rx_flush, uint, 0644);
|
MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
|
|
static bool old_large_send __read_mostly;
|
module_param(old_large_send, bool, 0444);
|
MODULE_PARM_DESC(old_large_send,
|
"Use old large send method on firmware that supports the new method");
|
|
struct ibmveth_stat {
|
char name[ETH_GSTRING_LEN];
|
int offset;
|
};
|
|
#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
|
#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
|
|
static struct ibmveth_stat ibmveth_stats[] = {
|
{ "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
|
{ "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
|
{ "replenish_add_buff_failure",
|
IBMVETH_STAT_OFF(replenish_add_buff_failure) },
|
{ "replenish_add_buff_success",
|
IBMVETH_STAT_OFF(replenish_add_buff_success) },
|
{ "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
|
{ "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
|
{ "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
|
{ "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
|
{ "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
|
{ "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
|
{ "tx_large_packets", IBMVETH_STAT_OFF(tx_large_packets) },
|
{ "rx_large_packets", IBMVETH_STAT_OFF(rx_large_packets) },
|
{ "fw_enabled_large_send", IBMVETH_STAT_OFF(fw_large_send_support) }
|
};
|
|
/* simple methods of getting data from the current rxq entry */
|
static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
|
{
|
return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off);
|
}
|
|
static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
|
{
|
return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >>
|
IBMVETH_RXQ_TOGGLE_SHIFT;
|
}
|
|
static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
|
{
|
return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle;
|
}
|
|
static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
|
{
|
return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID;
|
}
|
|
static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
|
{
|
return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK;
|
}
|
|
static inline int ibmveth_rxq_large_packet(struct ibmveth_adapter *adapter)
|
{
|
return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_LRG_PKT;
|
}
|
|
static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
|
{
|
return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
|
}
|
|
static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
|
{
|
return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD;
|
}
|
|
/* setup the initial settings for a buffer pool */
|
static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool,
|
u32 pool_index, u32 pool_size,
|
u32 buff_size, u32 pool_active)
|
{
|
pool->size = pool_size;
|
pool->index = pool_index;
|
pool->buff_size = buff_size;
|
pool->threshold = pool_size * 7 / 8;
|
pool->active = pool_active;
|
}
|
|
/* allocate and setup an buffer pool - called during open */
|
static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
|
{
|
int i;
|
|
pool->free_map = kmalloc_array(pool->size, sizeof(u16), GFP_KERNEL);
|
|
if (!pool->free_map)
|
return -1;
|
|
pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL);
|
if (!pool->dma_addr) {
|
kfree(pool->free_map);
|
pool->free_map = NULL;
|
return -1;
|
}
|
|
pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
|
|
if (!pool->skbuff) {
|
kfree(pool->dma_addr);
|
pool->dma_addr = NULL;
|
|
kfree(pool->free_map);
|
pool->free_map = NULL;
|
return -1;
|
}
|
|
for (i = 0; i < pool->size; ++i)
|
pool->free_map[i] = i;
|
|
atomic_set(&pool->available, 0);
|
pool->producer_index = 0;
|
pool->consumer_index = 0;
|
|
return 0;
|
}
|
|
static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
|
{
|
unsigned long offset;
|
|
for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
|
asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
|
}
|
|
/* replenish the buffers for a pool. note that we don't need to
|
* skb_reserve these since they are used for incoming...
|
*/
|
static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
|
struct ibmveth_buff_pool *pool)
|
{
|
u32 i;
|
u32 count = pool->size - atomic_read(&pool->available);
|
u32 buffers_added = 0;
|
struct sk_buff *skb;
|
unsigned int free_index, index;
|
u64 correlator;
|
unsigned long lpar_rc;
|
dma_addr_t dma_addr;
|
|
mb();
|
|
for (i = 0; i < count; ++i) {
|
union ibmveth_buf_desc desc;
|
|
skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
|
|
if (!skb) {
|
netdev_dbg(adapter->netdev,
|
"replenish: unable to allocate skb\n");
|
adapter->replenish_no_mem++;
|
break;
|
}
|
|
free_index = pool->consumer_index;
|
pool->consumer_index++;
|
if (pool->consumer_index >= pool->size)
|
pool->consumer_index = 0;
|
index = pool->free_map[free_index];
|
|
BUG_ON(index == IBM_VETH_INVALID_MAP);
|
BUG_ON(pool->skbuff[index] != NULL);
|
|
dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
|
pool->buff_size, DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
|
goto failure;
|
|
pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
|
pool->dma_addr[index] = dma_addr;
|
pool->skbuff[index] = skb;
|
|
correlator = ((u64)pool->index << 32) | index;
|
*(u64 *)skb->data = correlator;
|
|
desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
|
desc.fields.address = dma_addr;
|
|
if (rx_flush) {
|
unsigned int len = min(pool->buff_size,
|
adapter->netdev->mtu +
|
IBMVETH_BUFF_OH);
|
ibmveth_flush_buffer(skb->data, len);
|
}
|
lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address,
|
desc.desc);
|
|
if (lpar_rc != H_SUCCESS) {
|
goto failure;
|
} else {
|
buffers_added++;
|
adapter->replenish_add_buff_success++;
|
}
|
}
|
|
mb();
|
atomic_add(buffers_added, &(pool->available));
|
return;
|
|
failure:
|
pool->free_map[free_index] = index;
|
pool->skbuff[index] = NULL;
|
if (pool->consumer_index == 0)
|
pool->consumer_index = pool->size - 1;
|
else
|
pool->consumer_index--;
|
if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
|
dma_unmap_single(&adapter->vdev->dev,
|
pool->dma_addr[index], pool->buff_size,
|
DMA_FROM_DEVICE);
|
dev_kfree_skb_any(skb);
|
adapter->replenish_add_buff_failure++;
|
|
mb();
|
atomic_add(buffers_added, &(pool->available));
|
}
|
|
/*
|
* The final 8 bytes of the buffer list is a counter of frames dropped
|
* because there was not a buffer in the buffer list capable of holding
|
* the frame.
|
*/
|
static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter)
|
{
|
__be64 *p = adapter->buffer_list_addr + 4096 - 8;
|
|
adapter->rx_no_buffer = be64_to_cpup(p);
|
}
|
|
/* replenish routine */
|
static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
|
{
|
int i;
|
|
adapter->replenish_task_cycles++;
|
|
for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) {
|
struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
|
|
if (pool->active &&
|
(atomic_read(&pool->available) < pool->threshold))
|
ibmveth_replenish_buffer_pool(adapter, pool);
|
}
|
|
ibmveth_update_rx_no_buffer(adapter);
|
}
|
|
/* empty and free ana buffer pool - also used to do cleanup in error paths */
|
static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter,
|
struct ibmveth_buff_pool *pool)
|
{
|
int i;
|
|
kfree(pool->free_map);
|
pool->free_map = NULL;
|
|
if (pool->skbuff && pool->dma_addr) {
|
for (i = 0; i < pool->size; ++i) {
|
struct sk_buff *skb = pool->skbuff[i];
|
if (skb) {
|
dma_unmap_single(&adapter->vdev->dev,
|
pool->dma_addr[i],
|
pool->buff_size,
|
DMA_FROM_DEVICE);
|
dev_kfree_skb_any(skb);
|
pool->skbuff[i] = NULL;
|
}
|
}
|
}
|
|
if (pool->dma_addr) {
|
kfree(pool->dma_addr);
|
pool->dma_addr = NULL;
|
}
|
|
if (pool->skbuff) {
|
kfree(pool->skbuff);
|
pool->skbuff = NULL;
|
}
|
}
|
|
/* remove a buffer from a pool */
|
static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
|
u64 correlator)
|
{
|
unsigned int pool = correlator >> 32;
|
unsigned int index = correlator & 0xffffffffUL;
|
unsigned int free_index;
|
struct sk_buff *skb;
|
|
BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
|
BUG_ON(index >= adapter->rx_buff_pool[pool].size);
|
|
skb = adapter->rx_buff_pool[pool].skbuff[index];
|
|
BUG_ON(skb == NULL);
|
|
adapter->rx_buff_pool[pool].skbuff[index] = NULL;
|
|
dma_unmap_single(&adapter->vdev->dev,
|
adapter->rx_buff_pool[pool].dma_addr[index],
|
adapter->rx_buff_pool[pool].buff_size,
|
DMA_FROM_DEVICE);
|
|
free_index = adapter->rx_buff_pool[pool].producer_index;
|
adapter->rx_buff_pool[pool].producer_index++;
|
if (adapter->rx_buff_pool[pool].producer_index >=
|
adapter->rx_buff_pool[pool].size)
|
adapter->rx_buff_pool[pool].producer_index = 0;
|
adapter->rx_buff_pool[pool].free_map[free_index] = index;
|
|
mb();
|
|
atomic_dec(&(adapter->rx_buff_pool[pool].available));
|
}
|
|
/* get the current buffer on the rx queue */
|
static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
|
{
|
u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
|
unsigned int pool = correlator >> 32;
|
unsigned int index = correlator & 0xffffffffUL;
|
|
BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
|
BUG_ON(index >= adapter->rx_buff_pool[pool].size);
|
|
return adapter->rx_buff_pool[pool].skbuff[index];
|
}
|
|
/* recycle the current buffer on the rx queue */
|
static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
|
{
|
u32 q_index = adapter->rx_queue.index;
|
u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
|
unsigned int pool = correlator >> 32;
|
unsigned int index = correlator & 0xffffffffUL;
|
union ibmveth_buf_desc desc;
|
unsigned long lpar_rc;
|
int ret = 1;
|
|
BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
|
BUG_ON(index >= adapter->rx_buff_pool[pool].size);
|
|
if (!adapter->rx_buff_pool[pool].active) {
|
ibmveth_rxq_harvest_buffer(adapter);
|
ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
|
goto out;
|
}
|
|
desc.fields.flags_len = IBMVETH_BUF_VALID |
|
adapter->rx_buff_pool[pool].buff_size;
|
desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
|
|
lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
|
|
if (lpar_rc != H_SUCCESS) {
|
netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed "
|
"during recycle rc=%ld", lpar_rc);
|
ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
|
ret = 0;
|
}
|
|
if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
|
adapter->rx_queue.index = 0;
|
adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
|
}
|
|
out:
|
return ret;
|
}
|
|
static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
|
{
|
ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
|
|
if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
|
adapter->rx_queue.index = 0;
|
adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
|
}
|
}
|
|
static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
|
union ibmveth_buf_desc rxq_desc, u64 mac_address)
|
{
|
int rc, try_again = 1;
|
|
/*
|
* After a kexec the adapter will still be open, so our attempt to
|
* open it will fail. So if we get a failure we free the adapter and
|
* try again, but only once.
|
*/
|
retry:
|
rc = h_register_logical_lan(adapter->vdev->unit_address,
|
adapter->buffer_list_dma, rxq_desc.desc,
|
adapter->filter_list_dma, mac_address);
|
|
if (rc != H_SUCCESS && try_again) {
|
do {
|
rc = h_free_logical_lan(adapter->vdev->unit_address);
|
} while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
|
|
try_again = 0;
|
goto retry;
|
}
|
|
return rc;
|
}
|
|
static u64 ibmveth_encode_mac_addr(u8 *mac)
|
{
|
int i;
|
u64 encoded = 0;
|
|
for (i = 0; i < ETH_ALEN; i++)
|
encoded = (encoded << 8) | mac[i];
|
|
return encoded;
|
}
|
|
static int ibmveth_open(struct net_device *netdev)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
u64 mac_address;
|
int rxq_entries = 1;
|
unsigned long lpar_rc;
|
int rc;
|
union ibmveth_buf_desc rxq_desc;
|
int i;
|
struct device *dev;
|
|
netdev_dbg(netdev, "open starting\n");
|
|
napi_enable(&adapter->napi);
|
|
for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
rxq_entries += adapter->rx_buff_pool[i].size;
|
|
rc = -ENOMEM;
|
adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
|
if (!adapter->buffer_list_addr) {
|
netdev_err(netdev, "unable to allocate list pages\n");
|
goto out;
|
}
|
|
adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
|
if (!adapter->filter_list_addr) {
|
netdev_err(netdev, "unable to allocate filter pages\n");
|
goto out_free_buffer_list;
|
}
|
|
dev = &adapter->vdev->dev;
|
|
adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) *
|
rxq_entries;
|
adapter->rx_queue.queue_addr =
|
dma_alloc_coherent(dev, adapter->rx_queue.queue_len,
|
&adapter->rx_queue.queue_dma, GFP_KERNEL);
|
if (!adapter->rx_queue.queue_addr)
|
goto out_free_filter_list;
|
|
adapter->buffer_list_dma = dma_map_single(dev,
|
adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
|
if (dma_mapping_error(dev, adapter->buffer_list_dma)) {
|
netdev_err(netdev, "unable to map buffer list pages\n");
|
goto out_free_queue_mem;
|
}
|
|
adapter->filter_list_dma = dma_map_single(dev,
|
adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
|
if (dma_mapping_error(dev, adapter->filter_list_dma)) {
|
netdev_err(netdev, "unable to map filter list pages\n");
|
goto out_unmap_buffer_list;
|
}
|
|
adapter->rx_queue.index = 0;
|
adapter->rx_queue.num_slots = rxq_entries;
|
adapter->rx_queue.toggle = 1;
|
|
mac_address = ibmveth_encode_mac_addr(netdev->dev_addr);
|
|
rxq_desc.fields.flags_len = IBMVETH_BUF_VALID |
|
adapter->rx_queue.queue_len;
|
rxq_desc.fields.address = adapter->rx_queue.queue_dma;
|
|
netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr);
|
netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr);
|
netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
|
|
h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
|
|
lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
|
|
if (lpar_rc != H_SUCCESS) {
|
netdev_err(netdev, "h_register_logical_lan failed with %ld\n",
|
lpar_rc);
|
netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq "
|
"desc:0x%llx MAC:0x%llx\n",
|
adapter->buffer_list_dma,
|
adapter->filter_list_dma,
|
rxq_desc.desc,
|
mac_address);
|
rc = -ENONET;
|
goto out_unmap_filter_list;
|
}
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
if (!adapter->rx_buff_pool[i].active)
|
continue;
|
if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
|
netdev_err(netdev, "unable to alloc pool\n");
|
adapter->rx_buff_pool[i].active = 0;
|
rc = -ENOMEM;
|
goto out_free_buffer_pools;
|
}
|
}
|
|
netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq);
|
rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name,
|
netdev);
|
if (rc != 0) {
|
netdev_err(netdev, "unable to request irq 0x%x, rc %d\n",
|
netdev->irq, rc);
|
do {
|
lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
|
} while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
|
|
goto out_free_buffer_pools;
|
}
|
|
rc = -ENOMEM;
|
adapter->bounce_buffer =
|
kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
|
if (!adapter->bounce_buffer)
|
goto out_free_irq;
|
|
adapter->bounce_buffer_dma =
|
dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
|
netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
|
if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
|
netdev_err(netdev, "unable to map bounce buffer\n");
|
goto out_free_bounce_buffer;
|
}
|
|
netdev_dbg(netdev, "initial replenish cycle\n");
|
ibmveth_interrupt(netdev->irq, netdev);
|
|
netif_start_queue(netdev);
|
|
netdev_dbg(netdev, "open complete\n");
|
|
return 0;
|
|
out_free_bounce_buffer:
|
kfree(adapter->bounce_buffer);
|
out_free_irq:
|
free_irq(netdev->irq, netdev);
|
out_free_buffer_pools:
|
while (--i >= 0) {
|
if (adapter->rx_buff_pool[i].active)
|
ibmveth_free_buffer_pool(adapter,
|
&adapter->rx_buff_pool[i]);
|
}
|
out_unmap_filter_list:
|
dma_unmap_single(dev, adapter->filter_list_dma, 4096,
|
DMA_BIDIRECTIONAL);
|
out_unmap_buffer_list:
|
dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
|
DMA_BIDIRECTIONAL);
|
out_free_queue_mem:
|
dma_free_coherent(dev, adapter->rx_queue.queue_len,
|
adapter->rx_queue.queue_addr,
|
adapter->rx_queue.queue_dma);
|
out_free_filter_list:
|
free_page((unsigned long)adapter->filter_list_addr);
|
out_free_buffer_list:
|
free_page((unsigned long)adapter->buffer_list_addr);
|
out:
|
napi_disable(&adapter->napi);
|
return rc;
|
}
|
|
static int ibmveth_close(struct net_device *netdev)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
struct device *dev = &adapter->vdev->dev;
|
long lpar_rc;
|
int i;
|
|
netdev_dbg(netdev, "close starting\n");
|
|
napi_disable(&adapter->napi);
|
|
if (!adapter->pool_config)
|
netif_stop_queue(netdev);
|
|
h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
|
|
do {
|
lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
|
} while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
|
|
if (lpar_rc != H_SUCCESS) {
|
netdev_err(netdev, "h_free_logical_lan failed with %lx, "
|
"continuing with close\n", lpar_rc);
|
}
|
|
free_irq(netdev->irq, netdev);
|
|
ibmveth_update_rx_no_buffer(adapter);
|
|
dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
|
DMA_BIDIRECTIONAL);
|
free_page((unsigned long)adapter->buffer_list_addr);
|
|
dma_unmap_single(dev, adapter->filter_list_dma, 4096,
|
DMA_BIDIRECTIONAL);
|
free_page((unsigned long)adapter->filter_list_addr);
|
|
dma_free_coherent(dev, adapter->rx_queue.queue_len,
|
adapter->rx_queue.queue_addr,
|
adapter->rx_queue.queue_dma);
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
if (adapter->rx_buff_pool[i].active)
|
ibmveth_free_buffer_pool(adapter,
|
&adapter->rx_buff_pool[i]);
|
|
dma_unmap_single(&adapter->vdev->dev, adapter->bounce_buffer_dma,
|
adapter->netdev->mtu + IBMVETH_BUFF_OH,
|
DMA_BIDIRECTIONAL);
|
kfree(adapter->bounce_buffer);
|
|
netdev_dbg(netdev, "close complete\n");
|
|
return 0;
|
}
|
|
static int ibmveth_set_link_ksettings(struct net_device *dev,
|
const struct ethtool_link_ksettings *cmd)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
return ethtool_virtdev_set_link_ksettings(dev, cmd,
|
&adapter->speed,
|
&adapter->duplex);
|
}
|
|
static int ibmveth_get_link_ksettings(struct net_device *dev,
|
struct ethtool_link_ksettings *cmd)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
cmd->base.speed = adapter->speed;
|
cmd->base.duplex = adapter->duplex;
|
cmd->base.port = PORT_OTHER;
|
|
return 0;
|
}
|
|
static void ibmveth_init_link_settings(struct net_device *dev)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
adapter->speed = SPEED_1000;
|
adapter->duplex = DUPLEX_FULL;
|
}
|
|
static void netdev_get_drvinfo(struct net_device *dev,
|
struct ethtool_drvinfo *info)
|
{
|
strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver));
|
strlcpy(info->version, ibmveth_driver_version, sizeof(info->version));
|
}
|
|
static netdev_features_t ibmveth_fix_features(struct net_device *dev,
|
netdev_features_t features)
|
{
|
/*
|
* Since the ibmveth firmware interface does not have the
|
* concept of separate tx/rx checksum offload enable, if rx
|
* checksum is disabled we also have to disable tx checksum
|
* offload. Once we disable rx checksum offload, we are no
|
* longer allowed to send tx buffers that are not properly
|
* checksummed.
|
*/
|
|
if (!(features & NETIF_F_RXCSUM))
|
features &= ~NETIF_F_CSUM_MASK;
|
|
return features;
|
}
|
|
static int ibmveth_set_csum_offload(struct net_device *dev, u32 data)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
unsigned long set_attr, clr_attr, ret_attr;
|
unsigned long set_attr6, clr_attr6;
|
long ret, ret4, ret6;
|
int rc1 = 0, rc2 = 0;
|
int restart = 0;
|
|
if (netif_running(dev)) {
|
restart = 1;
|
adapter->pool_config = 1;
|
ibmveth_close(dev);
|
adapter->pool_config = 0;
|
}
|
|
set_attr = 0;
|
clr_attr = 0;
|
set_attr6 = 0;
|
clr_attr6 = 0;
|
|
if (data) {
|
set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
|
set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
|
} else {
|
clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
|
clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
|
}
|
|
ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
|
|
if (ret == H_SUCCESS &&
|
(ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
|
ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
|
set_attr, &ret_attr);
|
|
if (ret4 != H_SUCCESS) {
|
netdev_err(dev, "unable to change IPv4 checksum "
|
"offload settings. %d rc=%ld\n",
|
data, ret4);
|
|
h_illan_attributes(adapter->vdev->unit_address,
|
set_attr, clr_attr, &ret_attr);
|
|
if (data == 1)
|
dev->features &= ~NETIF_F_IP_CSUM;
|
|
} else {
|
adapter->fw_ipv4_csum_support = data;
|
}
|
|
ret6 = h_illan_attributes(adapter->vdev->unit_address,
|
clr_attr6, set_attr6, &ret_attr);
|
|
if (ret6 != H_SUCCESS) {
|
netdev_err(dev, "unable to change IPv6 checksum "
|
"offload settings. %d rc=%ld\n",
|
data, ret6);
|
|
h_illan_attributes(adapter->vdev->unit_address,
|
set_attr6, clr_attr6, &ret_attr);
|
|
if (data == 1)
|
dev->features &= ~NETIF_F_IPV6_CSUM;
|
|
} else
|
adapter->fw_ipv6_csum_support = data;
|
|
if (ret4 == H_SUCCESS || ret6 == H_SUCCESS)
|
adapter->rx_csum = data;
|
else
|
rc1 = -EIO;
|
} else {
|
rc1 = -EIO;
|
netdev_err(dev, "unable to change checksum offload settings."
|
" %d rc=%ld ret_attr=%lx\n", data, ret,
|
ret_attr);
|
}
|
|
if (restart)
|
rc2 = ibmveth_open(dev);
|
|
return rc1 ? rc1 : rc2;
|
}
|
|
static int ibmveth_set_tso(struct net_device *dev, u32 data)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
unsigned long set_attr, clr_attr, ret_attr;
|
long ret1, ret2;
|
int rc1 = 0, rc2 = 0;
|
int restart = 0;
|
|
if (netif_running(dev)) {
|
restart = 1;
|
adapter->pool_config = 1;
|
ibmveth_close(dev);
|
adapter->pool_config = 0;
|
}
|
|
set_attr = 0;
|
clr_attr = 0;
|
|
if (data)
|
set_attr = IBMVETH_ILLAN_LRG_SR_ENABLED;
|
else
|
clr_attr = IBMVETH_ILLAN_LRG_SR_ENABLED;
|
|
ret1 = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
|
|
if (ret1 == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) &&
|
!old_large_send) {
|
ret2 = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
|
set_attr, &ret_attr);
|
|
if (ret2 != H_SUCCESS) {
|
netdev_err(dev, "unable to change tso settings. %d rc=%ld\n",
|
data, ret2);
|
|
h_illan_attributes(adapter->vdev->unit_address,
|
set_attr, clr_attr, &ret_attr);
|
|
if (data == 1)
|
dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
|
rc1 = -EIO;
|
|
} else {
|
adapter->fw_large_send_support = data;
|
adapter->large_send = data;
|
}
|
} else {
|
/* Older firmware version of large send offload does not
|
* support tcp6/ipv6
|
*/
|
if (data == 1) {
|
dev->features &= ~NETIF_F_TSO6;
|
netdev_info(dev, "TSO feature requires all partitions to have updated driver");
|
}
|
adapter->large_send = data;
|
}
|
|
if (restart)
|
rc2 = ibmveth_open(dev);
|
|
return rc1 ? rc1 : rc2;
|
}
|
|
static int ibmveth_set_features(struct net_device *dev,
|
netdev_features_t features)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
int rx_csum = !!(features & NETIF_F_RXCSUM);
|
int large_send = !!(features & (NETIF_F_TSO | NETIF_F_TSO6));
|
int rc1 = 0, rc2 = 0;
|
|
if (rx_csum != adapter->rx_csum) {
|
rc1 = ibmveth_set_csum_offload(dev, rx_csum);
|
if (rc1 && !adapter->rx_csum)
|
dev->features =
|
features & ~(NETIF_F_CSUM_MASK |
|
NETIF_F_RXCSUM);
|
}
|
|
if (large_send != adapter->large_send) {
|
rc2 = ibmveth_set_tso(dev, large_send);
|
if (rc2 && !adapter->large_send)
|
dev->features =
|
features & ~(NETIF_F_TSO | NETIF_F_TSO6);
|
}
|
|
return rc1 ? rc1 : rc2;
|
}
|
|
static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
|
{
|
int i;
|
|
if (stringset != ETH_SS_STATS)
|
return;
|
|
for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
|
memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
|
}
|
|
static int ibmveth_get_sset_count(struct net_device *dev, int sset)
|
{
|
switch (sset) {
|
case ETH_SS_STATS:
|
return ARRAY_SIZE(ibmveth_stats);
|
default:
|
return -EOPNOTSUPP;
|
}
|
}
|
|
static void ibmveth_get_ethtool_stats(struct net_device *dev,
|
struct ethtool_stats *stats, u64 *data)
|
{
|
int i;
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
|
data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
|
}
|
|
static const struct ethtool_ops netdev_ethtool_ops = {
|
.get_drvinfo = netdev_get_drvinfo,
|
.get_link = ethtool_op_get_link,
|
.get_strings = ibmveth_get_strings,
|
.get_sset_count = ibmveth_get_sset_count,
|
.get_ethtool_stats = ibmveth_get_ethtool_stats,
|
.get_link_ksettings = ibmveth_get_link_ksettings,
|
.set_link_ksettings = ibmveth_set_link_ksettings,
|
};
|
|
static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
{
|
return -EOPNOTSUPP;
|
}
|
|
static int ibmveth_send(struct ibmveth_adapter *adapter,
|
union ibmveth_buf_desc *descs, unsigned long mss)
|
{
|
unsigned long correlator;
|
unsigned int retry_count;
|
unsigned long ret;
|
|
/*
|
* The retry count sets a maximum for the number of broadcast and
|
* multicast destinations within the system.
|
*/
|
retry_count = 1024;
|
correlator = 0;
|
do {
|
ret = h_send_logical_lan(adapter->vdev->unit_address,
|
descs[0].desc, descs[1].desc,
|
descs[2].desc, descs[3].desc,
|
descs[4].desc, descs[5].desc,
|
correlator, &correlator, mss,
|
adapter->fw_large_send_support);
|
} while ((ret == H_BUSY) && (retry_count--));
|
|
if (ret != H_SUCCESS && ret != H_DROPPED) {
|
netdev_err(adapter->netdev, "tx: h_send_logical_lan failed "
|
"with rc=%ld\n", ret);
|
return 1;
|
}
|
|
return 0;
|
}
|
|
static int ibmveth_is_packet_unsupported(struct sk_buff *skb,
|
struct net_device *netdev)
|
{
|
struct ethhdr *ether_header;
|
int ret = 0;
|
|
ether_header = eth_hdr(skb);
|
|
if (ether_addr_equal(ether_header->h_dest, netdev->dev_addr)) {
|
netdev_dbg(netdev, "veth doesn't support loopback packets, dropping packet.\n");
|
netdev->stats.tx_dropped++;
|
ret = -EOPNOTSUPP;
|
}
|
|
return ret;
|
}
|
|
static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
|
struct net_device *netdev)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
unsigned int desc_flags;
|
union ibmveth_buf_desc descs[6];
|
int last, i;
|
int force_bounce = 0;
|
dma_addr_t dma_addr;
|
unsigned long mss = 0;
|
|
if (ibmveth_is_packet_unsupported(skb, netdev))
|
goto out;
|
|
/* veth doesn't handle frag_list, so linearize the skb.
|
* When GRO is enabled SKB's can have frag_list.
|
*/
|
if (adapter->is_active_trunk &&
|
skb_has_frag_list(skb) && __skb_linearize(skb)) {
|
netdev->stats.tx_dropped++;
|
goto out;
|
}
|
|
/*
|
* veth handles a maximum of 6 segments including the header, so
|
* we have to linearize the skb if there are more than this.
|
*/
|
if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
|
netdev->stats.tx_dropped++;
|
goto out;
|
}
|
|
/* veth can't checksum offload UDP */
|
if (skb->ip_summed == CHECKSUM_PARTIAL &&
|
((skb->protocol == htons(ETH_P_IP) &&
|
ip_hdr(skb)->protocol != IPPROTO_TCP) ||
|
(skb->protocol == htons(ETH_P_IPV6) &&
|
ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
|
skb_checksum_help(skb)) {
|
|
netdev_err(netdev, "tx: failed to checksum packet\n");
|
netdev->stats.tx_dropped++;
|
goto out;
|
}
|
|
desc_flags = IBMVETH_BUF_VALID;
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
unsigned char *buf = skb_transport_header(skb) +
|
skb->csum_offset;
|
|
desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
|
|
/* Need to zero out the checksum */
|
buf[0] = 0;
|
buf[1] = 0;
|
|
if (skb_is_gso(skb) && adapter->fw_large_send_support)
|
desc_flags |= IBMVETH_BUF_LRG_SND;
|
}
|
|
retry_bounce:
|
memset(descs, 0, sizeof(descs));
|
|
/*
|
* If a linear packet is below the rx threshold then
|
* copy it into the static bounce buffer. This avoids the
|
* cost of a TCE insert and remove.
|
*/
|
if (force_bounce || (!skb_is_nonlinear(skb) &&
|
(skb->len < tx_copybreak))) {
|
skb_copy_from_linear_data(skb, adapter->bounce_buffer,
|
skb->len);
|
|
descs[0].fields.flags_len = desc_flags | skb->len;
|
descs[0].fields.address = adapter->bounce_buffer_dma;
|
|
if (ibmveth_send(adapter, descs, 0)) {
|
adapter->tx_send_failed++;
|
netdev->stats.tx_dropped++;
|
} else {
|
netdev->stats.tx_packets++;
|
netdev->stats.tx_bytes += skb->len;
|
}
|
|
goto out;
|
}
|
|
/* Map the header */
|
dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
|
skb_headlen(skb), DMA_TO_DEVICE);
|
if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
|
goto map_failed;
|
|
descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
|
descs[0].fields.address = dma_addr;
|
|
/* Map the frags */
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
|
|
dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0,
|
skb_frag_size(frag), DMA_TO_DEVICE);
|
|
if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
|
goto map_failed_frags;
|
|
descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag);
|
descs[i+1].fields.address = dma_addr;
|
}
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL && skb_is_gso(skb)) {
|
if (adapter->fw_large_send_support) {
|
mss = (unsigned long)skb_shinfo(skb)->gso_size;
|
adapter->tx_large_packets++;
|
} else if (!skb_is_gso_v6(skb)) {
|
/* Put -1 in the IP checksum to tell phyp it
|
* is a largesend packet. Put the mss in
|
* the TCP checksum.
|
*/
|
ip_hdr(skb)->check = 0xffff;
|
tcp_hdr(skb)->check =
|
cpu_to_be16(skb_shinfo(skb)->gso_size);
|
adapter->tx_large_packets++;
|
}
|
}
|
|
if (ibmveth_send(adapter, descs, mss)) {
|
adapter->tx_send_failed++;
|
netdev->stats.tx_dropped++;
|
} else {
|
netdev->stats.tx_packets++;
|
netdev->stats.tx_bytes += skb->len;
|
}
|
|
dma_unmap_single(&adapter->vdev->dev,
|
descs[0].fields.address,
|
descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK,
|
DMA_TO_DEVICE);
|
|
for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++)
|
dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
|
descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
|
DMA_TO_DEVICE);
|
|
out:
|
dev_consume_skb_any(skb);
|
return NETDEV_TX_OK;
|
|
map_failed_frags:
|
last = i+1;
|
for (i = 1; i < last; i++)
|
dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
|
descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
|
DMA_TO_DEVICE);
|
|
dma_unmap_single(&adapter->vdev->dev,
|
descs[0].fields.address,
|
descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK,
|
DMA_TO_DEVICE);
|
map_failed:
|
if (!firmware_has_feature(FW_FEATURE_CMO))
|
netdev_err(netdev, "tx: unable to map xmit buffer\n");
|
adapter->tx_map_failed++;
|
if (skb_linearize(skb)) {
|
netdev->stats.tx_dropped++;
|
goto out;
|
}
|
force_bounce = 1;
|
goto retry_bounce;
|
}
|
|
static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt)
|
{
|
struct tcphdr *tcph;
|
int offset = 0;
|
int hdr_len;
|
|
/* only TCP packets will be aggregated */
|
if (skb->protocol == htons(ETH_P_IP)) {
|
struct iphdr *iph = (struct iphdr *)skb->data;
|
|
if (iph->protocol == IPPROTO_TCP) {
|
offset = iph->ihl * 4;
|
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
|
} else {
|
return;
|
}
|
} else if (skb->protocol == htons(ETH_P_IPV6)) {
|
struct ipv6hdr *iph6 = (struct ipv6hdr *)skb->data;
|
|
if (iph6->nexthdr == IPPROTO_TCP) {
|
offset = sizeof(struct ipv6hdr);
|
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
|
} else {
|
return;
|
}
|
} else {
|
return;
|
}
|
/* if mss is not set through Large Packet bit/mss in rx buffer,
|
* expect that the mss will be written to the tcp header checksum.
|
*/
|
tcph = (struct tcphdr *)(skb->data + offset);
|
if (lrg_pkt) {
|
skb_shinfo(skb)->gso_size = mss;
|
} else if (offset) {
|
skb_shinfo(skb)->gso_size = ntohs(tcph->check);
|
tcph->check = 0;
|
}
|
|
if (skb_shinfo(skb)->gso_size) {
|
hdr_len = offset + tcph->doff * 4;
|
skb_shinfo(skb)->gso_segs =
|
DIV_ROUND_UP(skb->len - hdr_len,
|
skb_shinfo(skb)->gso_size);
|
}
|
}
|
|
static void ibmveth_rx_csum_helper(struct sk_buff *skb,
|
struct ibmveth_adapter *adapter)
|
{
|
struct iphdr *iph = NULL;
|
struct ipv6hdr *iph6 = NULL;
|
__be16 skb_proto = 0;
|
u16 iphlen = 0;
|
u16 iph_proto = 0;
|
u16 tcphdrlen = 0;
|
|
skb_proto = be16_to_cpu(skb->protocol);
|
|
if (skb_proto == ETH_P_IP) {
|
iph = (struct iphdr *)skb->data;
|
|
/* If the IP checksum is not offloaded and if the packet
|
* is large send, the checksum must be rebuilt.
|
*/
|
if (iph->check == 0xffff) {
|
iph->check = 0;
|
iph->check = ip_fast_csum((unsigned char *)iph,
|
iph->ihl);
|
}
|
|
iphlen = iph->ihl * 4;
|
iph_proto = iph->protocol;
|
} else if (skb_proto == ETH_P_IPV6) {
|
iph6 = (struct ipv6hdr *)skb->data;
|
iphlen = sizeof(struct ipv6hdr);
|
iph_proto = iph6->nexthdr;
|
}
|
|
/* In OVS environment, when a flow is not cached, specifically for a
|
* new TCP connection, the first packet information is passed up
|
* the user space for finding a flow. During this process, OVS computes
|
* checksum on the first packet when CHECKSUM_PARTIAL flag is set.
|
*
|
* Given that we zeroed out TCP checksum field in transmit path
|
* (refer ibmveth_start_xmit routine) as we set "no checksum bit",
|
* OVS computed checksum will be incorrect w/o TCP pseudo checksum
|
* in the packet. This leads to OVS dropping the packet and hence
|
* TCP retransmissions are seen.
|
*
|
* So, re-compute TCP pseudo header checksum.
|
*/
|
if (iph_proto == IPPROTO_TCP && adapter->is_active_trunk) {
|
struct tcphdr *tcph = (struct tcphdr *)(skb->data + iphlen);
|
|
tcphdrlen = skb->len - iphlen;
|
|
/* Recompute TCP pseudo header checksum */
|
if (skb_proto == ETH_P_IP)
|
tcph->check = ~csum_tcpudp_magic(iph->saddr,
|
iph->daddr, tcphdrlen, iph_proto, 0);
|
else if (skb_proto == ETH_P_IPV6)
|
tcph->check = ~csum_ipv6_magic(&iph6->saddr,
|
&iph6->daddr, tcphdrlen, iph_proto, 0);
|
|
/* Setup SKB fields for checksum offload */
|
skb_partial_csum_set(skb, iphlen,
|
offsetof(struct tcphdr, check));
|
skb_reset_network_header(skb);
|
}
|
}
|
|
static int ibmveth_poll(struct napi_struct *napi, int budget)
|
{
|
struct ibmveth_adapter *adapter =
|
container_of(napi, struct ibmveth_adapter, napi);
|
struct net_device *netdev = adapter->netdev;
|
int frames_processed = 0;
|
unsigned long lpar_rc;
|
u16 mss = 0;
|
|
while (frames_processed < budget) {
|
if (!ibmveth_rxq_pending_buffer(adapter))
|
break;
|
|
smp_rmb();
|
if (!ibmveth_rxq_buffer_valid(adapter)) {
|
wmb(); /* suggested by larson1 */
|
adapter->rx_invalid_buffer++;
|
netdev_dbg(netdev, "recycling invalid buffer\n");
|
ibmveth_rxq_recycle_buffer(adapter);
|
} else {
|
struct sk_buff *skb, *new_skb;
|
int length = ibmveth_rxq_frame_length(adapter);
|
int offset = ibmveth_rxq_frame_offset(adapter);
|
int csum_good = ibmveth_rxq_csum_good(adapter);
|
int lrg_pkt = ibmveth_rxq_large_packet(adapter);
|
__sum16 iph_check = 0;
|
|
skb = ibmveth_rxq_get_buffer(adapter);
|
|
/* if the large packet bit is set in the rx queue
|
* descriptor, the mss will be written by PHYP eight
|
* bytes from the start of the rx buffer, which is
|
* skb->data at this stage
|
*/
|
if (lrg_pkt) {
|
__be64 *rxmss = (__be64 *)(skb->data + 8);
|
|
mss = (u16)be64_to_cpu(*rxmss);
|
}
|
|
new_skb = NULL;
|
if (length < rx_copybreak)
|
new_skb = netdev_alloc_skb(netdev, length);
|
|
if (new_skb) {
|
skb_copy_to_linear_data(new_skb,
|
skb->data + offset,
|
length);
|
if (rx_flush)
|
ibmveth_flush_buffer(skb->data,
|
length + offset);
|
if (!ibmveth_rxq_recycle_buffer(adapter))
|
kfree_skb(skb);
|
skb = new_skb;
|
} else {
|
ibmveth_rxq_harvest_buffer(adapter);
|
skb_reserve(skb, offset);
|
}
|
|
skb_put(skb, length);
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
/* PHYP without PLSO support places a -1 in the ip
|
* checksum for large send frames.
|
*/
|
if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
|
struct iphdr *iph = (struct iphdr *)skb->data;
|
|
iph_check = iph->check;
|
}
|
|
if ((length > netdev->mtu + ETH_HLEN) ||
|
lrg_pkt || iph_check == 0xffff) {
|
ibmveth_rx_mss_helper(skb, mss, lrg_pkt);
|
adapter->rx_large_packets++;
|
}
|
|
if (csum_good) {
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
ibmveth_rx_csum_helper(skb, adapter);
|
}
|
|
napi_gro_receive(napi, skb); /* send it up */
|
|
netdev->stats.rx_packets++;
|
netdev->stats.rx_bytes += length;
|
frames_processed++;
|
}
|
}
|
|
ibmveth_replenish_task(adapter);
|
|
if (frames_processed < budget) {
|
napi_complete_done(napi, frames_processed);
|
|
/* We think we are done - reenable interrupts,
|
* then check once more to make sure we are done.
|
*/
|
lpar_rc = h_vio_signal(adapter->vdev->unit_address,
|
VIO_IRQ_ENABLE);
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
|
if (ibmveth_rxq_pending_buffer(adapter) &&
|
napi_reschedule(napi)) {
|
lpar_rc = h_vio_signal(adapter->vdev->unit_address,
|
VIO_IRQ_DISABLE);
|
}
|
}
|
|
return frames_processed;
|
}
|
|
static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
|
{
|
struct net_device *netdev = dev_instance;
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
unsigned long lpar_rc;
|
|
if (napi_schedule_prep(&adapter->napi)) {
|
lpar_rc = h_vio_signal(adapter->vdev->unit_address,
|
VIO_IRQ_DISABLE);
|
BUG_ON(lpar_rc != H_SUCCESS);
|
__napi_schedule(&adapter->napi);
|
}
|
return IRQ_HANDLED;
|
}
|
|
static void ibmveth_set_multicast_list(struct net_device *netdev)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
unsigned long lpar_rc;
|
|
if ((netdev->flags & IFF_PROMISC) ||
|
(netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
IbmVethMcastEnableRecv |
|
IbmVethMcastDisableFiltering,
|
0);
|
if (lpar_rc != H_SUCCESS) {
|
netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
|
"entering promisc mode\n", lpar_rc);
|
}
|
} else {
|
struct netdev_hw_addr *ha;
|
/* clear the filter table & disable filtering */
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
IbmVethMcastEnableRecv |
|
IbmVethMcastDisableFiltering |
|
IbmVethMcastClearFilterTable,
|
0);
|
if (lpar_rc != H_SUCCESS) {
|
netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
|
"attempting to clear filter table\n",
|
lpar_rc);
|
}
|
/* add the addresses to the filter table */
|
netdev_for_each_mc_addr(ha, netdev) {
|
/* add the multicast address to the filter table */
|
u64 mcast_addr;
|
mcast_addr = ibmveth_encode_mac_addr(ha->addr);
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
IbmVethMcastAddFilter,
|
mcast_addr);
|
if (lpar_rc != H_SUCCESS) {
|
netdev_err(netdev, "h_multicast_ctrl rc=%ld "
|
"when adding an entry to the filter "
|
"table\n", lpar_rc);
|
}
|
}
|
|
/* re-enable filtering */
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
IbmVethMcastEnableFiltering,
|
0);
|
if (lpar_rc != H_SUCCESS) {
|
netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
|
"enabling filtering\n", lpar_rc);
|
}
|
}
|
}
|
|
static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
struct vio_dev *viodev = adapter->vdev;
|
int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
|
int i, rc;
|
int need_restart = 0;
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size)
|
break;
|
|
if (i == IBMVETH_NUM_BUFF_POOLS)
|
return -EINVAL;
|
|
/* Deactivate all the buffer pools so that the next loop can activate
|
only the buffer pools necessary to hold the new MTU */
|
if (netif_running(adapter->netdev)) {
|
need_restart = 1;
|
adapter->pool_config = 1;
|
ibmveth_close(adapter->netdev);
|
adapter->pool_config = 0;
|
}
|
|
/* Look for an active buffer pool that can hold the new MTU */
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
adapter->rx_buff_pool[i].active = 1;
|
|
if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) {
|
dev->mtu = new_mtu;
|
vio_cmo_set_dev_desired(viodev,
|
ibmveth_get_desired_dma
|
(viodev));
|
if (need_restart) {
|
return ibmveth_open(adapter->netdev);
|
}
|
return 0;
|
}
|
}
|
|
if (need_restart && (rc = ibmveth_open(adapter->netdev)))
|
return rc;
|
|
return -EINVAL;
|
}
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
static void ibmveth_poll_controller(struct net_device *dev)
|
{
|
ibmveth_replenish_task(netdev_priv(dev));
|
ibmveth_interrupt(dev->irq, dev);
|
}
|
#endif
|
|
/**
|
* ibmveth_get_desired_dma - Calculate IO memory desired by the driver
|
*
|
* @vdev: struct vio_dev for the device whose desired IO mem is to be returned
|
*
|
* Return value:
|
* Number of bytes of IO data the driver will need to perform well.
|
*/
|
static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
|
{
|
struct net_device *netdev = dev_get_drvdata(&vdev->dev);
|
struct ibmveth_adapter *adapter;
|
struct iommu_table *tbl;
|
unsigned long ret;
|
int i;
|
int rxqentries = 1;
|
|
tbl = get_iommu_table_base(&vdev->dev);
|
|
/* netdev inits at probe time along with the structures we need below*/
|
if (netdev == NULL)
|
return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl);
|
|
adapter = netdev_priv(netdev);
|
|
ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
|
ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl);
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
/* add the size of the active receive buffers */
|
if (adapter->rx_buff_pool[i].active)
|
ret +=
|
adapter->rx_buff_pool[i].size *
|
IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
|
buff_size, tbl);
|
rxqentries += adapter->rx_buff_pool[i].size;
|
}
|
/* add the size of the receive queue entries */
|
ret += IOMMU_PAGE_ALIGN(
|
rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl);
|
|
return ret;
|
}
|
|
static int ibmveth_set_mac_addr(struct net_device *dev, void *p)
|
{
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
struct sockaddr *addr = p;
|
u64 mac_address;
|
int rc;
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
return -EADDRNOTAVAIL;
|
|
mac_address = ibmveth_encode_mac_addr(addr->sa_data);
|
rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address);
|
if (rc) {
|
netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc);
|
return rc;
|
}
|
|
ether_addr_copy(dev->dev_addr, addr->sa_data);
|
|
return 0;
|
}
|
|
static const struct net_device_ops ibmveth_netdev_ops = {
|
.ndo_open = ibmveth_open,
|
.ndo_stop = ibmveth_close,
|
.ndo_start_xmit = ibmveth_start_xmit,
|
.ndo_set_rx_mode = ibmveth_set_multicast_list,
|
.ndo_do_ioctl = ibmveth_ioctl,
|
.ndo_change_mtu = ibmveth_change_mtu,
|
.ndo_fix_features = ibmveth_fix_features,
|
.ndo_set_features = ibmveth_set_features,
|
.ndo_validate_addr = eth_validate_addr,
|
.ndo_set_mac_address = ibmveth_set_mac_addr,
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
.ndo_poll_controller = ibmveth_poll_controller,
|
#endif
|
};
|
|
static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
|
{
|
int rc, i, mac_len;
|
struct net_device *netdev;
|
struct ibmveth_adapter *adapter;
|
unsigned char *mac_addr_p;
|
__be32 *mcastFilterSize_p;
|
long ret;
|
unsigned long ret_attr;
|
|
dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n",
|
dev->unit_address);
|
|
mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR,
|
&mac_len);
|
if (!mac_addr_p) {
|
dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
|
return -EINVAL;
|
}
|
/* Workaround for old/broken pHyp */
|
if (mac_len == 8)
|
mac_addr_p += 2;
|
else if (mac_len != 6) {
|
dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n",
|
mac_len);
|
return -EINVAL;
|
}
|
|
mcastFilterSize_p = (__be32 *)vio_get_attribute(dev,
|
VETH_MCAST_FILTER_SIZE,
|
NULL);
|
if (!mcastFilterSize_p) {
|
dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
|
"attribute\n");
|
return -EINVAL;
|
}
|
|
netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
|
|
if (!netdev)
|
return -ENOMEM;
|
|
adapter = netdev_priv(netdev);
|
dev_set_drvdata(&dev->dev, netdev);
|
|
adapter->vdev = dev;
|
adapter->netdev = netdev;
|
adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p);
|
adapter->pool_config = 0;
|
ibmveth_init_link_settings(netdev);
|
|
netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
|
|
netdev->irq = dev->irq;
|
netdev->netdev_ops = &ibmveth_netdev_ops;
|
netdev->ethtool_ops = &netdev_ethtool_ops;
|
SET_NETDEV_DEV(netdev, &dev->dev);
|
netdev->hw_features = NETIF_F_SG;
|
if (vio_get_attribute(dev, "ibm,illan-options", NULL) != NULL) {
|
netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
|
NETIF_F_RXCSUM;
|
}
|
|
netdev->features |= netdev->hw_features;
|
|
ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
|
|
/* If running older firmware, TSO should not be enabled by default */
|
if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) &&
|
!old_large_send) {
|
netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
|
netdev->features |= netdev->hw_features;
|
} else {
|
netdev->hw_features |= NETIF_F_TSO;
|
}
|
|
adapter->is_active_trunk = false;
|
if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK)) {
|
adapter->is_active_trunk = true;
|
netdev->hw_features |= NETIF_F_FRAGLIST;
|
netdev->features |= NETIF_F_FRAGLIST;
|
}
|
|
netdev->min_mtu = IBMVETH_MIN_MTU;
|
netdev->max_mtu = ETH_MAX_MTU - IBMVETH_BUFF_OH;
|
|
memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN);
|
|
if (firmware_has_feature(FW_FEATURE_CMO))
|
memcpy(pool_count, pool_count_cmo, sizeof(pool_count));
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
|
int error;
|
|
ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
|
pool_count[i], pool_size[i],
|
pool_active[i]);
|
error = kobject_init_and_add(kobj, &ktype_veth_pool,
|
&dev->dev.kobj, "pool%d", i);
|
if (!error)
|
kobject_uevent(kobj, KOBJ_ADD);
|
}
|
|
netdev_dbg(netdev, "adapter @ 0x%p\n", adapter);
|
netdev_dbg(netdev, "registering netdev...\n");
|
|
ibmveth_set_features(netdev, netdev->features);
|
|
rc = register_netdev(netdev);
|
|
if (rc) {
|
netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc);
|
free_netdev(netdev);
|
return rc;
|
}
|
|
netdev_dbg(netdev, "registered\n");
|
|
return 0;
|
}
|
|
static int ibmveth_remove(struct vio_dev *dev)
|
{
|
struct net_device *netdev = dev_get_drvdata(&dev->dev);
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
int i;
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
kobject_put(&adapter->rx_buff_pool[i].kobj);
|
|
unregister_netdev(netdev);
|
|
free_netdev(netdev);
|
dev_set_drvdata(&dev->dev, NULL);
|
|
return 0;
|
}
|
|
static struct attribute veth_active_attr;
|
static struct attribute veth_num_attr;
|
static struct attribute veth_size_attr;
|
|
static ssize_t veth_pool_show(struct kobject *kobj,
|
struct attribute *attr, char *buf)
|
{
|
struct ibmveth_buff_pool *pool = container_of(kobj,
|
struct ibmveth_buff_pool,
|
kobj);
|
|
if (attr == &veth_active_attr)
|
return sprintf(buf, "%d\n", pool->active);
|
else if (attr == &veth_num_attr)
|
return sprintf(buf, "%d\n", pool->size);
|
else if (attr == &veth_size_attr)
|
return sprintf(buf, "%d\n", pool->buff_size);
|
return 0;
|
}
|
|
static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr,
|
const char *buf, size_t count)
|
{
|
struct ibmveth_buff_pool *pool = container_of(kobj,
|
struct ibmveth_buff_pool,
|
kobj);
|
struct net_device *netdev = dev_get_drvdata(
|
container_of(kobj->parent, struct device, kobj));
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
long value = simple_strtol(buf, NULL, 10);
|
long rc;
|
|
if (attr == &veth_active_attr) {
|
if (value && !pool->active) {
|
if (netif_running(netdev)) {
|
if (ibmveth_alloc_buffer_pool(pool)) {
|
netdev_err(netdev,
|
"unable to alloc pool\n");
|
return -ENOMEM;
|
}
|
pool->active = 1;
|
adapter->pool_config = 1;
|
ibmveth_close(netdev);
|
adapter->pool_config = 0;
|
if ((rc = ibmveth_open(netdev)))
|
return rc;
|
} else {
|
pool->active = 1;
|
}
|
} else if (!value && pool->active) {
|
int mtu = netdev->mtu + IBMVETH_BUFF_OH;
|
int i;
|
/* Make sure there is a buffer pool with buffers that
|
can hold a packet of the size of the MTU */
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
if (pool == &adapter->rx_buff_pool[i])
|
continue;
|
if (!adapter->rx_buff_pool[i].active)
|
continue;
|
if (mtu <= adapter->rx_buff_pool[i].buff_size)
|
break;
|
}
|
|
if (i == IBMVETH_NUM_BUFF_POOLS) {
|
netdev_err(netdev, "no active pool >= MTU\n");
|
return -EPERM;
|
}
|
|
if (netif_running(netdev)) {
|
adapter->pool_config = 1;
|
ibmveth_close(netdev);
|
pool->active = 0;
|
adapter->pool_config = 0;
|
if ((rc = ibmveth_open(netdev)))
|
return rc;
|
}
|
pool->active = 0;
|
}
|
} else if (attr == &veth_num_attr) {
|
if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) {
|
return -EINVAL;
|
} else {
|
if (netif_running(netdev)) {
|
adapter->pool_config = 1;
|
ibmveth_close(netdev);
|
adapter->pool_config = 0;
|
pool->size = value;
|
if ((rc = ibmveth_open(netdev)))
|
return rc;
|
} else {
|
pool->size = value;
|
}
|
}
|
} else if (attr == &veth_size_attr) {
|
if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) {
|
return -EINVAL;
|
} else {
|
if (netif_running(netdev)) {
|
adapter->pool_config = 1;
|
ibmveth_close(netdev);
|
adapter->pool_config = 0;
|
pool->buff_size = value;
|
if ((rc = ibmveth_open(netdev)))
|
return rc;
|
} else {
|
pool->buff_size = value;
|
}
|
}
|
}
|
|
/* kick the interrupt handler to allocate/deallocate pools */
|
ibmveth_interrupt(netdev->irq, netdev);
|
return count;
|
}
|
|
|
#define ATTR(_name, _mode) \
|
struct attribute veth_##_name##_attr = { \
|
.name = __stringify(_name), .mode = _mode, \
|
};
|
|
static ATTR(active, 0644);
|
static ATTR(num, 0644);
|
static ATTR(size, 0644);
|
|
static struct attribute *veth_pool_attrs[] = {
|
&veth_active_attr,
|
&veth_num_attr,
|
&veth_size_attr,
|
NULL,
|
};
|
|
static const struct sysfs_ops veth_pool_ops = {
|
.show = veth_pool_show,
|
.store = veth_pool_store,
|
};
|
|
static struct kobj_type ktype_veth_pool = {
|
.release = NULL,
|
.sysfs_ops = &veth_pool_ops,
|
.default_attrs = veth_pool_attrs,
|
};
|
|
static int ibmveth_resume(struct device *dev)
|
{
|
struct net_device *netdev = dev_get_drvdata(dev);
|
ibmveth_interrupt(netdev->irq, netdev);
|
return 0;
|
}
|
|
static const struct vio_device_id ibmveth_device_table[] = {
|
{ "network", "IBM,l-lan"},
|
{ "", "" }
|
};
|
MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
|
|
static const struct dev_pm_ops ibmveth_pm_ops = {
|
.resume = ibmveth_resume
|
};
|
|
static struct vio_driver ibmveth_driver = {
|
.id_table = ibmveth_device_table,
|
.probe = ibmveth_probe,
|
.remove = ibmveth_remove,
|
.get_desired_dma = ibmveth_get_desired_dma,
|
.name = ibmveth_driver_name,
|
.pm = &ibmveth_pm_ops,
|
};
|
|
static int __init ibmveth_module_init(void)
|
{
|
printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name,
|
ibmveth_driver_string, ibmveth_driver_version);
|
|
return vio_register_driver(&ibmveth_driver);
|
}
|
|
static void __exit ibmveth_module_exit(void)
|
{
|
vio_unregister_driver(&ibmveth_driver);
|
}
|
|
module_init(ibmveth_module_init);
|
module_exit(ibmveth_module_exit);
|
