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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [net/] [ibmveth.c] - Blame information for rev 62

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/**************************************************************************/
/*                                                                        */
/* IBM eServer i/pSeries Virtual Ethernet Device Driver                   */
/* Copyright (C) 2003 IBM Corp.                                           */
/*  Originally written by Dave Larson (larson1@us.ibm.com)                */
/*  Maintained by Santiago Leon (santil@us.ibm.com)                       */
/*                                                                        */
/*  This program is free software; you can redistribute it and/or modify  */
/*  it under the terms of the GNU General Public License as published by  */
/*  the Free Software Foundation; either version 2 of the License, or     */
/*  (at your option) any later version.                                   */
/*                                                                        */
/*  This program is distributed in the hope that it will be useful,       */
/*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
/*  GNU General Public License for more details.                          */
/*                                                                        */
/*  You should have received a copy of the GNU General Public License     */
/*  along with this program; if not, write to the Free Software           */
/*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  */
/*                                                                   USA  */
/*                                                                        */
/* This module contains the implementation of a virtual ethernet device   */
/* for use with IBM i/pSeries LPAR Linux.  It utilizes the logical LAN    */
/* option of the RS/6000 Platform Architechture to interface with virtual */
/* ethernet NICs that are presented to the partition by the hypervisor.   */
/*                                                                        */
/**************************************************************************/
/*
  TODO:
  - add support for sysfs
  - possibly remove procfs support
*/
 
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/ioport.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/delay.h>
#include <linux/mm.h>
#include <linux/ethtool.h>
#include <linux/proc_fs.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <net/net_namespace.h>
#include <asm/semaphore.h>
#include <asm/hvcall.h>
#include <asm/atomic.h>
#include <asm/vio.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
 
#include "ibmveth.h"
 
#undef DEBUG
 
#define ibmveth_printk(fmt, args...) \
  printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
 
#define ibmveth_error_printk(fmt, args...) \
  printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
 
#ifdef DEBUG
#define ibmveth_debug_printk_no_adapter(fmt, args...) \
  printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
#define ibmveth_debug_printk(fmt, args...) \
  printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
#define ibmveth_assert(expr) \
  if(!(expr)) {                                   \
    printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
    BUG(); \
  }
#else
#define ibmveth_debug_printk_no_adapter(fmt, args...)
#define ibmveth_debug_printk(fmt, args...)
#define ibmveth_assert(expr)
#endif
 
static int ibmveth_open(struct net_device *dev);
static int ibmveth_close(struct net_device *dev);
static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static int ibmveth_poll(struct napi_struct *napi, int budget);
static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
static void ibmveth_set_multicast_list(struct net_device *dev);
static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
static void ibmveth_proc_register_driver(void);
static void ibmveth_proc_unregister_driver(void);
static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
static struct kobj_type ktype_veth_pool;
 
#ifdef CONFIG_PROC_FS
#define IBMVETH_PROC_DIR "ibmveth"
static struct proc_dir_entry *ibmveth_proc_dir;
#endif
 
static const char ibmveth_driver_name[] = "ibmveth";
static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
#define ibmveth_driver_version "1.03"
 
MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(ibmveth_driver_version);
 
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))
 
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) },
};
 
/* simple methods of getting data from the current rxq entry */
static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
{
        return 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_frame_length(struct ibmveth_adapter *adapter)
{
        return (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 / 2;
        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(sizeof(u16) * pool->size, GFP_KERNEL);
 
        if(!pool->free_map) {
                return -1;
        }
 
        pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
        if(!pool->dma_addr) {
                kfree(pool->free_map);
                pool->free_map = NULL;
                return -1;
        }
 
        pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
 
        if(!pool->skbuff) {
                kfree(pool->dma_addr);
                pool->dma_addr = NULL;
 
                kfree(pool->free_map);
                pool->free_map = NULL;
                return -1;
        }
 
        memset(pool->skbuff, 0, sizeof(void*) * pool->size);
        memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
 
        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;
}
 
/* 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;
 
        mb();
 
        for(i = 0; i < count; ++i) {
                struct sk_buff *skb;
                unsigned int free_index, index;
                u64 correlator;
                union ibmveth_buf_desc desc;
                unsigned long lpar_rc;
                dma_addr_t dma_addr;
 
                skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 
                if(!skb) {
                        ibmveth_debug_printk("replenish: unable to allocate skb\n");
                        adapter->replenish_no_mem++;
                        break;
                }
 
                free_index = pool->consumer_index;
                pool->consumer_index = (pool->consumer_index + 1) % pool->size;
                index = pool->free_map[free_index];
 
                ibmveth_assert(index != IBM_VETH_INVALID_MAP);
                ibmveth_assert(pool->skbuff[index] == NULL);
 
                dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
                                pool->buff_size, DMA_FROM_DEVICE);
 
                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;
 
                lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 
                if(lpar_rc != H_SUCCESS) {
                        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--;
                        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++;
                        break;
                } else {
                        buffers_added++;
                        adapter->replenish_add_buff_success++;
                }
        }
 
        mb();
        atomic_add(buffers_added, &(pool->available));
}
 
/* replenish routine */
static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
{
        int i;
 
        adapter->replenish_task_cycles++;
 
        for(i = 0; i < IbmVethNumBufferPools; i++)
                if(adapter->rx_buff_pool[i].active)
                        ibmveth_replenish_buffer_pool(adapter,
                                                     &adapter->rx_buff_pool[i]);
 
        adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
}
 
/* 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;
 
        ibmveth_assert(pool < IbmVethNumBufferPools);
        ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 
        skb = adapter->rx_buff_pool[pool].skbuff[index];
 
        ibmveth_assert(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
                = (adapter->rx_buff_pool[pool].producer_index + 1)
                % adapter->rx_buff_pool[pool].size;
        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;
 
        ibmveth_assert(pool < IbmVethNumBufferPools);
        ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 
        return adapter->rx_buff_pool[pool].skbuff[index];
}
 
/* recycle the current buffer on the rx queue */
static void 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;
 
        ibmveth_assert(pool < IbmVethNumBufferPools);
        ibmveth_assert(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]);
                return;
        }
 
        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) {
                ibmveth_debug_printk("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);
        }
 
        if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
                adapter->rx_queue.index = 0;
                adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
        }
}
 
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 void ibmveth_cleanup(struct ibmveth_adapter *adapter)
{
        int i;
 
        if(adapter->buffer_list_addr != NULL) {
                if(!dma_mapping_error(adapter->buffer_list_dma)) {
                        dma_unmap_single(&adapter->vdev->dev,
                                        adapter->buffer_list_dma, 4096,
                                        DMA_BIDIRECTIONAL);
                        adapter->buffer_list_dma = DMA_ERROR_CODE;
                }
                free_page((unsigned long)adapter->buffer_list_addr);
                adapter->buffer_list_addr = NULL;
        }
 
        if(adapter->filter_list_addr != NULL) {
                if(!dma_mapping_error(adapter->filter_list_dma)) {
                        dma_unmap_single(&adapter->vdev->dev,
                                        adapter->filter_list_dma, 4096,
                                        DMA_BIDIRECTIONAL);
                        adapter->filter_list_dma = DMA_ERROR_CODE;
                }
                free_page((unsigned long)adapter->filter_list_addr);
                adapter->filter_list_addr = NULL;
        }
 
        if(adapter->rx_queue.queue_addr != NULL) {
                if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
                        dma_unmap_single(&adapter->vdev->dev,
                                        adapter->rx_queue.queue_dma,
                                        adapter->rx_queue.queue_len,
                                        DMA_BIDIRECTIONAL);
                        adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
                }
                kfree(adapter->rx_queue.queue_addr);
                adapter->rx_queue.queue_addr = NULL;
        }
 
        for(i = 0; i<IbmVethNumBufferPools; i++)
                if (adapter->rx_buff_pool[i].active)
                        ibmveth_free_buffer_pool(adapter,
                                                 &adapter->rx_buff_pool[i]);
}
 
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 int ibmveth_open(struct net_device *netdev)
{
        struct ibmveth_adapter *adapter = netdev->priv;
        u64 mac_address = 0;
        int rxq_entries = 1;
        unsigned long lpar_rc;
        int rc;
        union ibmveth_buf_desc rxq_desc;
        int i;
 
        ibmveth_debug_printk("open starting\n");
 
        napi_enable(&adapter->napi);
 
        for(i = 0; i<IbmVethNumBufferPools; i++)
                rxq_entries += adapter->rx_buff_pool[i].size;
 
        adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
        adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 
        if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
                ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
                ibmveth_cleanup(adapter);
                napi_disable(&adapter->napi);
                return -ENOMEM;
        }
 
        adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
        adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 
        if(!adapter->rx_queue.queue_addr) {
                ibmveth_error_printk("unable to allocate rx queue pages\n");
                ibmveth_cleanup(adapter);
                napi_disable(&adapter->napi);
                return -ENOMEM;
        }
 
        adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
                        adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
        adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
                        adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
        adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
                        adapter->rx_queue.queue_addr,
                        adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 
        if((dma_mapping_error(adapter->buffer_list_dma) ) ||
           (dma_mapping_error(adapter->filter_list_dma)) ||
           (dma_mapping_error(adapter->rx_queue.queue_dma))) {
                ibmveth_error_printk("unable to map filter or buffer list pages\n");
                ibmveth_cleanup(adapter);
                napi_disable(&adapter->napi);
                return -ENOMEM;
        }
 
        adapter->rx_queue.index = 0;
        adapter->rx_queue.num_slots = rxq_entries;
        adapter->rx_queue.toggle = 1;
 
        memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
        mac_address = mac_address >> 16;
 
        rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
        rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 
        ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
        ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
        ibmveth_debug_printk("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) {
                ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
                ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
                                     adapter->buffer_list_dma,
                                     adapter->filter_list_dma,
                                     rxq_desc.desc,
                                     mac_address);
                ibmveth_cleanup(adapter);
                napi_disable(&adapter->napi);
                return -ENONET;
        }
 
        for(i = 0; i<IbmVethNumBufferPools; i++) {
                if(!adapter->rx_buff_pool[i].active)
                        continue;
                if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
                        ibmveth_error_printk("unable to alloc pool\n");
                        adapter->rx_buff_pool[i].active = 0;
                        ibmveth_cleanup(adapter);
                        napi_disable(&adapter->napi);
                        return -ENOMEM ;
                }
        }
 
        ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
        if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
                ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
                do {
                        rc = h_free_logical_lan(adapter->vdev->unit_address);
                } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 
                ibmveth_cleanup(adapter);
                napi_disable(&adapter->napi);
                return rc;
        }
 
        ibmveth_debug_printk("initial replenish cycle\n");
        ibmveth_interrupt(netdev->irq, netdev);
 
        netif_start_queue(netdev);
 
        ibmveth_debug_printk("open complete\n");
 
        return 0;
}
 
static int ibmveth_close(struct net_device *netdev)
{
        struct ibmveth_adapter *adapter = netdev->priv;
        long lpar_rc;
 
        ibmveth_debug_printk("close starting\n");
 
        napi_disable(&adapter->napi);
 
        if (!adapter->pool_config)
                netif_stop_queue(netdev);
 
        free_irq(netdev->irq, netdev);
 
        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)
        {
                ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
                                     lpar_rc);
        }
 
        adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 
        ibmveth_cleanup(adapter);
 
        ibmveth_debug_printk("close complete\n");
 
        return 0;
}
 
static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
        cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
        cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
        cmd->speed = SPEED_1000;
        cmd->duplex = DUPLEX_FULL;
        cmd->port = PORT_FIBRE;
        cmd->phy_address = 0;
        cmd->transceiver = XCVR_INTERNAL;
        cmd->autoneg = AUTONEG_ENABLE;
        cmd->maxtxpkt = 0;
        cmd->maxrxpkt = 1;
        return 0;
}
 
static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
        strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
        strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
}
 
static u32 netdev_get_link(struct net_device *dev) {
        return 1;
}
 
static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
{
        struct ibmveth_adapter *adapter = dev->priv;
 
        if (data)
                adapter->rx_csum = 1;
        else {
                /*
                 * 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.
                 */
                adapter->rx_csum = 0;
                dev->features &= ~NETIF_F_IP_CSUM;
        }
}
 
static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
{
        struct ibmveth_adapter *adapter = dev->priv;
 
        if (data) {
                dev->features |= NETIF_F_IP_CSUM;
                adapter->rx_csum = 1;
        } else
                dev->features &= ~NETIF_F_IP_CSUM;
}
 
static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
                                    void (*done) (struct net_device *, u32))
{
        struct ibmveth_adapter *adapter = dev->priv;
        u64 set_attr, clr_attr, ret_attr;
        long ret;
        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_IPV4_TCP_CSUM;
        else
                clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
 
        ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
 
        if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
            !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
            (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
                ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
                                         set_attr, &ret_attr);
 
                if (ret != H_SUCCESS) {
                        rc1 = -EIO;
                        ibmveth_error_printk("unable to change checksum offload settings."
                                             " %d rc=%ld\n", data, ret);
 
                        ret = h_illan_attributes(adapter->vdev->unit_address,
                                                 set_attr, clr_attr, &ret_attr);
                } else
                        done(dev, data);
        } else {
                rc1 = -EIO;
                ibmveth_error_printk("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_rx_csum(struct net_device *dev, u32 data)
{
        struct ibmveth_adapter *adapter = dev->priv;
 
        if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
                return 0;
 
        return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
}
 
static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
{
        struct ibmveth_adapter *adapter = dev->priv;
        int rc = 0;
 
        if (data && (dev->features & NETIF_F_IP_CSUM))
                return 0;
        if (!data && !(dev->features & NETIF_F_IP_CSUM))
                return 0;
 
        if (data && !adapter->rx_csum)
                rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
        else
                ibmveth_set_tx_csum_flags(dev, data);
 
        return rc;
}
 
static u32 ibmveth_get_rx_csum(struct net_device *dev)
{
        struct ibmveth_adapter *adapter = dev->priv;
        return adapter->rx_csum;
}
 
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 = dev->priv;
 
        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_settings           = netdev_get_settings,
        .get_link               = netdev_get_link,
        .set_tx_csum            = ibmveth_set_tx_csum,
        .get_rx_csum            = ibmveth_get_rx_csum,
        .set_rx_csum            = ibmveth_set_rx_csum,
        .get_strings            = ibmveth_get_strings,
        .get_sset_count         = ibmveth_get_sset_count,
        .get_ethtool_stats      = ibmveth_get_ethtool_stats,
};
 
static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
        return -EOPNOTSUPP;
}
 
#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 
static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
{
        struct ibmveth_adapter *adapter = netdev->priv;
        union ibmveth_buf_desc desc;
        unsigned long lpar_rc;
        unsigned long correlator;
        unsigned long flags;
        unsigned int retry_count;
        unsigned int tx_dropped = 0;
        unsigned int tx_bytes = 0;
        unsigned int tx_packets = 0;
        unsigned int tx_send_failed = 0;
        unsigned int tx_map_failed = 0;
 
        desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
        desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
                                             skb->len, DMA_TO_DEVICE);
 
        if (skb->ip_summed == CHECKSUM_PARTIAL &&
            ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
                ibmveth_error_printk("tx: failed to checksum packet\n");
                tx_dropped++;
                goto out;
        }
 
        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
 
                desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
 
                /* Need to zero out the checksum */
                buf[0] = 0;
                buf[1] = 0;
        }
 
        if (dma_mapping_error(desc.fields.address)) {
                ibmveth_error_printk("tx: unable to map xmit buffer\n");
                tx_map_failed++;
                tx_dropped++;
                goto out;
        }
 
        /* send the frame. Arbitrarily set retrycount to 1024 */
        correlator = 0;
        retry_count = 1024;
        do {
                lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
                                             desc.desc, 0, 0, 0, 0, 0,
                                             correlator, &correlator);
        } while ((lpar_rc == H_BUSY) && (retry_count--));
 
        if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
                ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
                ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
                                     (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
                                     skb->len, desc.fields.address);
                tx_send_failed++;
                tx_dropped++;
        } else {
                tx_packets++;
                tx_bytes += skb->len;
                netdev->trans_start = jiffies;
        }
 
        dma_unmap_single(&adapter->vdev->dev, desc.fields.address,
                         skb->len, DMA_TO_DEVICE);
 
out:    spin_lock_irqsave(&adapter->stats_lock, flags);
        netdev->stats.tx_dropped += tx_dropped;
        netdev->stats.tx_bytes += tx_bytes;
        netdev->stats.tx_packets += tx_packets;
        adapter->tx_send_failed += tx_send_failed;
        adapter->tx_map_failed += tx_map_failed;
        spin_unlock_irqrestore(&adapter->stats_lock, flags);
 
        dev_kfree_skb(skb);
        return 0;
}
 
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;
 
 restart_poll:
        do {
                struct sk_buff *skb;
 
                if (!ibmveth_rxq_pending_buffer(adapter))
                        break;
 
                rmb();
                if (!ibmveth_rxq_buffer_valid(adapter)) {
                        wmb(); /* suggested by larson1 */
                        adapter->rx_invalid_buffer++;
                        ibmveth_debug_printk("recycling invalid buffer\n");
                        ibmveth_rxq_recycle_buffer(adapter);
                } else {
                        int length = ibmveth_rxq_frame_length(adapter);
                        int offset = ibmveth_rxq_frame_offset(adapter);
                        int csum_good = ibmveth_rxq_csum_good(adapter);
 
                        skb = ibmveth_rxq_get_buffer(adapter);
                        if (csum_good)
                                skb->ip_summed = CHECKSUM_UNNECESSARY;
 
                        ibmveth_rxq_harvest_buffer(adapter);
 
                        skb_reserve(skb, offset);
                        skb_put(skb, length);
                        skb->protocol = eth_type_trans(skb, netdev);
 
                        netif_receive_skb(skb); /* send it up */
 
                        netdev->stats.rx_packets++;
                        netdev->stats.rx_bytes += length;
                        frames_processed++;
                        netdev->last_rx = jiffies;
                }
        } while (frames_processed < budget);
 
        ibmveth_replenish_task(adapter);
 
        if (frames_processed < budget) {
                /* 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);
 
                ibmveth_assert(lpar_rc == H_SUCCESS);
 
                netif_rx_complete(netdev, napi);
 
                if (ibmveth_rxq_pending_buffer(adapter) &&
                    netif_rx_reschedule(netdev, napi)) {
                        lpar_rc = h_vio_signal(adapter->vdev->unit_address,
                                               VIO_IRQ_DISABLE);
                        goto restart_poll;
                }
        }
 
        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;
        unsigned long lpar_rc;
 
        if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
                lpar_rc = h_vio_signal(adapter->vdev->unit_address,
                                       VIO_IRQ_DISABLE);
                ibmveth_assert(lpar_rc == H_SUCCESS);
                __netif_rx_schedule(netdev, &adapter->napi);
        }
        return IRQ_HANDLED;
}
 
static void ibmveth_set_multicast_list(struct net_device *netdev)
{
        struct ibmveth_adapter *adapter = netdev->priv;
        unsigned long lpar_rc;
 
        if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
                lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
                                           IbmVethMcastEnableRecv |
                                           IbmVethMcastDisableFiltering,
                                           0);
                if(lpar_rc != H_SUCCESS) {
                        ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
                }
        } else {
                struct dev_mc_list *mclist = netdev->mc_list;
                int i;
                /* clear the filter table & disable filtering */
                lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
                                           IbmVethMcastEnableRecv |
                                           IbmVethMcastDisableFiltering |
                                           IbmVethMcastClearFilterTable,
                                           0);
                if(lpar_rc != H_SUCCESS) {
                        ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
                }
                /* add the addresses to the filter table */
                for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
                        // add the multicast address to the filter table
                        unsigned long mcast_addr = 0;
                        memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
                        lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
                                                   IbmVethMcastAddFilter,
                                                   mcast_addr);
                        if(lpar_rc != H_SUCCESS) {
                                ibmveth_error_printk("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) {
                        ibmveth_error_printk("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 = dev->priv;
        int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
        int reinit = 0;
        int i, rc;
 
        if (new_mtu < IBMVETH_MAX_MTU)
                return -EINVAL;
 
        for (i = 0; i < IbmVethNumBufferPools; i++)
                if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
                        break;
 
        if (i == IbmVethNumBufferPools)
                return -EINVAL;
 
        /* Look for an active buffer pool that can hold the new MTU */
        for(i = 0; i<IbmVethNumBufferPools; i++) {
                if (!adapter->rx_buff_pool[i].active) {
                        adapter->rx_buff_pool[i].active = 1;
                        reinit = 1;
                }
 
                if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
                        if (reinit && netif_running(adapter->netdev)) {
                                adapter->pool_config = 1;
                                ibmveth_close(adapter->netdev);
                                adapter->pool_config = 0;
                                dev->mtu = new_mtu;
                                if ((rc = ibmveth_open(adapter->netdev)))
                                        return rc;
                        } else
                                dev->mtu = new_mtu;
                        return 0;
                }
        }
        return -EINVAL;
}
 
#ifdef CONFIG_NET_POLL_CONTROLLER
static void ibmveth_poll_controller(struct net_device *dev)
{
        ibmveth_replenish_task(dev->priv);
        ibmveth_interrupt(dev->irq, dev);
}
#endif
 
static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
{
        int rc, i;
        long ret;
        struct net_device *netdev;
        struct ibmveth_adapter *adapter;
        u64 set_attr, ret_attr;
 
        unsigned char *mac_addr_p;
        unsigned int *mcastFilterSize_p;
 
 
        ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
                                        dev->unit_address);
 
        mac_addr_p = (unsigned char *) vio_get_attribute(dev,
                                                VETH_MAC_ADDR, NULL);
        if(!mac_addr_p) {
                printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
                                "attribute\n", __FILE__, __LINE__);
                return 0;
        }
 
        mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
                                                VETH_MCAST_FILTER_SIZE, NULL);
        if(!mcastFilterSize_p) {
                printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
                                "VETH_MCAST_FILTER_SIZE attribute\n",
                                __FILE__, __LINE__);
                return 0;
        }
 
        netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 
        if(!netdev)
                return -ENOMEM;
 
        adapter = netdev->priv;
        dev->dev.driver_data = netdev;
 
        adapter->vdev = dev;
        adapter->netdev = netdev;
        adapter->mcastFilterSize= *mcastFilterSize_p;
        adapter->pool_config = 0;
 
        netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
 
        /*      Some older boxes running PHYP non-natively have an OF that
                returns a 8-byte local-mac-address field (and the first
                2 bytes have to be ignored) while newer boxes' OF return
                a 6-byte field. Note that IEEE 1275 specifies that
                local-mac-address must be a 6-byte field.
                The RPA doc specifies that the first byte must be 10b, so
                we'll just look for it to solve this 8 vs. 6 byte field issue */
 
        if ((*mac_addr_p & 0x3) != 0x02)
                mac_addr_p += 2;
 
        adapter->mac_addr = 0;
        memcpy(&adapter->mac_addr, mac_addr_p, 6);
 
        netdev->irq = dev->irq;
        netdev->open               = ibmveth_open;
        netdev->stop               = ibmveth_close;
        netdev->hard_start_xmit    = ibmveth_start_xmit;
        netdev->set_multicast_list = ibmveth_set_multicast_list;
        netdev->do_ioctl           = ibmveth_ioctl;
        netdev->ethtool_ops           = &netdev_ethtool_ops;
        netdev->change_mtu         = ibmveth_change_mtu;
        SET_NETDEV_DEV(netdev, &dev->dev);
#ifdef CONFIG_NET_POLL_CONTROLLER
        netdev->poll_controller = ibmveth_poll_controller;
#endif
        netdev->features |= NETIF_F_LLTX;
        spin_lock_init(&adapter->stats_lock);
 
        memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 
        for(i = 0; i<IbmVethNumBufferPools; i++) {
                struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
                ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
                                         pool_count[i], pool_size[i],
                                         pool_active[i]);
                kobj->parent = &dev->dev.kobj;
                kobject_set_name(kobj, "pool%d", i);
                kobj->ktype = &ktype_veth_pool;
                kobject_register(kobj);
        }
 
        ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
 
        adapter->buffer_list_dma = DMA_ERROR_CODE;
        adapter->filter_list_dma = DMA_ERROR_CODE;
        adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 
        ibmveth_debug_printk("registering netdev...\n");
 
        ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
 
        if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
            !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
            (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
                set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
 
                ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
 
                if (ret == H_SUCCESS) {
                        adapter->rx_csum = 1;
                        netdev->features |= NETIF_F_IP_CSUM;
                } else
                        ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
        }
 
        rc = register_netdev(netdev);
 
        if(rc) {
                ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
                free_netdev(netdev);
                return rc;
        }
 
        ibmveth_debug_printk("registered\n");
 
        ibmveth_proc_register_adapter(adapter);
 
        return 0;
}
 
static int __devexit ibmveth_remove(struct vio_dev *dev)
{
        struct net_device *netdev = dev->dev.driver_data;
        struct ibmveth_adapter *adapter = netdev->priv;
        int i;
 
        for(i = 0; i<IbmVethNumBufferPools; i++)
                kobject_unregister(&adapter->rx_buff_pool[i].kobj);
 
        unregister_netdev(netdev);
 
        ibmveth_proc_unregister_adapter(adapter);
 
        free_netdev(netdev);
        return 0;
}
 
#ifdef CONFIG_PROC_FS
static void ibmveth_proc_register_driver(void)
{
        ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
        if (ibmveth_proc_dir) {
        }
}
 
static void ibmveth_proc_unregister_driver(void)
{
        remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
}
 
static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
{
        if (*pos == 0) {
                return (void *)1;
        } else {
                return NULL;
        }
}
 
static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
        ++*pos;
        return NULL;
}
 
static void ibmveth_seq_stop(struct seq_file *seq, void *v)
{
}
 
static int ibmveth_seq_show(struct seq_file *seq, void *v)
{
        struct ibmveth_adapter *adapter = seq->private;
        char *current_mac = ((char*) &adapter->netdev->dev_addr);
        char *firmware_mac = ((char*) &adapter->mac_addr) ;
        DECLARE_MAC_BUF(mac);
 
        seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
 
        seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
        seq_printf(seq, "Current MAC:     %s\n", print_mac(mac, current_mac));
        seq_printf(seq, "Firmware MAC:    %s\n", print_mac(mac, firmware_mac));
 
        seq_printf(seq, "\nAdapter Statistics:\n");
        seq_printf(seq, "  TX:  vio_map_single failres:      %ld\n", adapter->tx_map_failed);
        seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
        seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
        seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
        seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
        seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
        seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
 
        return 0;
}
static struct seq_operations ibmveth_seq_ops = {
        .start = ibmveth_seq_start,
        .next  = ibmveth_seq_next,
        .stop  = ibmveth_seq_stop,
        .show  = ibmveth_seq_show,
};
 
static int ibmveth_proc_open(struct inode *inode, struct file *file)
{
        struct seq_file *seq;
        struct proc_dir_entry *proc;
        int rc;
 
        rc = seq_open(file, &ibmveth_seq_ops);
        if (!rc) {
                /* recover the pointer buried in proc_dir_entry data */
                seq = file->private_data;
                proc = PDE(inode);
                seq->private = proc->data;
        }
        return rc;
}
 
static const struct file_operations ibmveth_proc_fops = {
        .owner   = THIS_MODULE,
        .open    = ibmveth_proc_open,
        .read    = seq_read,
        .llseek  = seq_lseek,
        .release = seq_release,
};
 
static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
{
        struct proc_dir_entry *entry;
        if (ibmveth_proc_dir) {
                char u_addr[10];
                sprintf(u_addr, "%x", adapter->vdev->unit_address);
                entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
                if (!entry) {
                        ibmveth_error_printk("Cannot create adapter proc entry");
                } else {
                        entry->data = (void *) adapter;
                        entry->proc_fops = &ibmveth_proc_fops;
                }
        }
        return;
}
 
static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
{
        if (ibmveth_proc_dir) {
                char u_addr[10];
                sprintf(u_addr, "%x", adapter->vdev->unit_address);
                remove_proc_entry(u_addr, ibmveth_proc_dir);
        }
}
 
#else /* CONFIG_PROC_FS */
static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
{
}
 
static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
{
}
static void ibmveth_proc_register_driver(void)
{
}
 
static void ibmveth_proc_unregister_driver(void)
{
}
#endif /* CONFIG_PROC_FS */
 
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 =
            container_of(kobj->parent, struct device, kobj)->driver_data;
        struct ibmveth_adapter *adapter = netdev->priv;
        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)) {
                                        ibmveth_error_printk("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 < IbmVethNumBufferPools; 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 == IbmVethNumBufferPools) {
                                ibmveth_error_printk("no active pool >= MTU\n");
                                return -EPERM;
                        }
 
                        pool->active = 0;
                        if (netif_running(netdev)) {
                                adapter->pool_config = 1;
                                ibmveth_close(netdev);
                                adapter->pool_config = 0;
                                if ((rc = ibmveth_open(netdev)))
                                        return rc;
                        }
                }
        } 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 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 struct vio_device_id ibmveth_device_table[] __devinitdata= {
        { "network", "IBM,l-lan"},
        { "", "" }
};
MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
 
static struct vio_driver ibmveth_driver = {
        .id_table       = ibmveth_device_table,
        .probe          = ibmveth_probe,
        .remove         = ibmveth_remove,
        .driver         = {
                .name   = ibmveth_driver_name,
                .owner  = THIS_MODULE,
        }
};
 
static int __init ibmveth_module_init(void)
{
        ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
 
        ibmveth_proc_register_driver();
 
        return vio_register_driver(&ibmveth_driver);
}
 
static void __exit ibmveth_module_exit(void)
{
        vio_unregister_driver(&ibmveth_driver);
        ibmveth_proc_unregister_driver();
}
 
module_init(ibmveth_module_init);
module_exit(ibmveth_module_exit);
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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [net/] [ibmveth.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/**************************************************************************/`
2			`/* */`
3			`/* IBM eServer i/pSeries Virtual Ethernet Device Driver */`
4			`/* Copyright (C) 2003 IBM Corp. */`
5			`/* Originally written by Dave Larson (larson1@us.ibm.com) */`
6			`/* Maintained by Santiago Leon (santil@us.ibm.com) */`
7			`/* */`
8			`/* This program is free software; you can redistribute it and/or modify */`
9			`/* it under the terms of the GNU General Public License as published by */`
10			`/* the Free Software Foundation; either version 2 of the License, or */`
11			`/* (at your option) any later version. */`
12			`/* */`
13			`/* This program is distributed in the hope that it will be useful, */`
14			`/* but WITHOUT ANY WARRANTY; without even the implied warranty of */`
15			`/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */`
16			`/* GNU General Public License for more details. */`
17			`/* */`
18			`/* You should have received a copy of the GNU General Public License */`
19			`/* along with this program; if not, write to the Free Software */`
20			`/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */`
21			`/* USA */`
22			`/* */`
23			`/* This module contains the implementation of a virtual ethernet device */`
24			`/* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */`
25			`/* option of the RS/6000 Platform Architechture to interface with virtual */`
26			`/* ethernet NICs that are presented to the partition by the hypervisor. */`
27			`/* */`
28			`/**************************************************************************/`
29			`/*`
30			`TODO:`
31			`- add support for sysfs`
32			`- possibly remove procfs support`
33			`*/`
34
35			`#include <linux/module.h>`
36			`#include <linux/types.h>`
37			`#include <linux/errno.h>`
38			`#include <linux/ioport.h>`
39			`#include <linux/dma-mapping.h>`
40			`#include <linux/kernel.h>`