--- /dev/null
+/**************************************************************************/
+/* */
+/* IBM eServer i/pSeries Virtual Ethernet Device Driver */
+/* Copyright (C) 2003 IBM Corp. */
+/* Dave Larson (larson1@us.ibm.com) */
+/* 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:
+ - remove frag processing code - no longer needed
+ - add support for sysfs
+ - possibly remove procfs support
+*/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/pci.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 <asm/semaphore.h>
+#include <asm/hvcall.h>
+#include <asm/atomic.h>
+#include <asm/pci_dma.h>
+#include <asm/vio.h>
+#include <asm/uaccess.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+#include "ibmveth.h"
+
+#define DEBUG 1
+
+#define ibmveth_printk(fmt, args...) \
+ printk(KERN_INFO "%s: " fmt, __FILE__, ## args)
+
+#define ibmveth_error_printk(fmt, args...) \
+ printk(KERN_ERR "(%s:%3.3d ua:%lx) 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:%lx): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
+#define ibmveth_assert(expr) \
+ if(!(expr)) { \
+ printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%lx): %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 net_device *dev, int *budget);
+static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static struct net_device_stats *ibmveth_get_stats(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, struct pt_regs *regs);
+
+#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";
+static const char ibmveth_driver_version[] = "1.0";
+
+MODULE_AUTHOR("Dave Larson <larson1@us.ibm.com>");
+MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
+MODULE_LICENSE("GPL");
+
+/* simple methods of getting data from the current rxq entry */
+static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
+{
+ return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
+}
+
+static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
+{
+ return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
+}
+
+static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
+{
+ return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
+}
+
+static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
+{
+ return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
+}
+
+/* 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)
+{
+ pool->size = pool_size;
+ pool->index = pool_index;
+ pool->buff_size = buff_size;
+ pool->threshold = pool_size / 2;
+}
+
+/* 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->size;
+ index = pool->free_map[free_index];
+
+ ibmveth_assert(index != 0xffff);
+ ibmveth_assert(pool->skbuff[index] == NULL);
+
+ dma_addr = vio_map_single(adapter->vdev, skb->data, pool->buff_size, PCI_DMA_FROMDEVICE);
+
+ pool->dma_addr[index] = dma_addr;
+ pool->skbuff[index] = skb;
+
+ correlator = ((u64)pool->index << 32) | index;
+ *(u64*)skb->data = correlator;
+
+ desc.desc = 0;
+ desc.fields.valid = 1;
+ desc.fields.length = 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->skbuff[index] = NULL;
+ pool->consumer_index--;
+ vio_unmap_single(adapter->vdev, pool->dma_addr[index], pool->buff_size, PCI_DMA_FROMDEVICE);
+ dev_kfree_skb_any(skb);
+ adapter->replenish_add_buff_failure++;
+ break;
+ } else {
+ pool->free_map[free_index] = 0xffff;
+ buffers_added++;
+ adapter->replenish_add_buff_success++;
+ }
+ }
+
+ mb();
+ atomic_add(buffers_added, &(pool->available));
+}
+
+/* check if replenishing is needed. */
+static inline int ibmveth_is_replenishing_needed(struct ibmveth_adapter *adapter)
+{
+ return ((atomic_read(&adapter->rx_buff_pool[0].available) < adapter->rx_buff_pool[0].threshold) ||
+ (atomic_read(&adapter->rx_buff_pool[1].available) < adapter->rx_buff_pool[1].threshold) ||
+ (atomic_read(&adapter->rx_buff_pool[2].available) < adapter->rx_buff_pool[2].threshold));
+}
+
+/* replenish tasklet routine */
+static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
+{
+ adapter->replenish_task_cycles++;
+
+ ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
+ ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
+ ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
+
+ adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
+
+ atomic_inc(&adapter->not_replenishing);
+ ibmveth_assert(atomic_read(&adapter->not_replenishing) == 1);
+}
+
+/* kick the replenish tasklet if we need replenishing and it isn't already running */
+static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter *adapter)
+{
+ if(ibmveth_is_replenishing_needed(adapter) &&
+ (atomic_dec_if_positive(&adapter->not_replenishing) == 0)) {
+ schedule_work(&adapter->replenish_task);
+ }
+}
+
+/* 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;
+
+ if(pool->free_map) {
+ 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) {
+ vio_unmap_single(adapter->vdev,
+ pool->dma_addr[i],
+ pool->buff_size,
+ PCI_DMA_FROMDEVICE);
+ 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;
+
+ vio_unmap_single(adapter->vdev,
+ adapter->rx_buff_pool[pool].dma_addr[index],
+ adapter->rx_buff_pool[pool].buff_size,
+ PCI_DMA_FROMDEVICE);
+
+ free_index = adapter->rx_buff_pool[pool].producer_index++ % 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);
+
+ desc.desc = 0;
+ desc.fields.valid = 1;
+ desc.fields.length = 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 inline 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)
+{
+ if(adapter->buffer_list_addr != NULL) {
+ if(adapter->buffer_list_dma != NO_TCE) {
+ vio_unmap_single(adapter->vdev, adapter->buffer_list_dma, 4096, PCI_DMA_BIDIRECTIONAL);
+ adapter->buffer_list_dma = NO_TCE;
+ }
+ free_page((unsigned long)adapter->buffer_list_addr);
+ adapter->buffer_list_addr = NULL;
+ }
+
+ if(adapter->filter_list_addr != NULL) {
+ if(adapter->filter_list_dma != NO_TCE) {
+ vio_unmap_single(adapter->vdev, adapter->filter_list_dma, 4096, PCI_DMA_BIDIRECTIONAL);
+ adapter->filter_list_dma = NO_TCE;
+ }
+ free_page((unsigned long)adapter->filter_list_addr);
+ adapter->filter_list_addr = NULL;
+ }
+
+ if(adapter->rx_queue.queue_addr != NULL) {
+ if(adapter->rx_queue.queue_dma != NO_TCE) {
+ vio_unmap_single(adapter->vdev, adapter->rx_queue.queue_dma, adapter->rx_queue.queue_len, PCI_DMA_BIDIRECTIONAL);
+ adapter->rx_queue.queue_dma = NO_TCE;
+ }
+ kfree(adapter->rx_queue.queue_addr);
+ adapter->rx_queue.queue_addr = NULL;
+ }
+
+ ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
+ ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
+ ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
+}
+
+static int ibmveth_open(struct net_device *netdev)
+{
+ struct ibmveth_adapter *adapter = netdev->priv;
+ u64 mac_address = 0;
+ int rxq_entries;
+ unsigned long lpar_rc;
+ int rc;
+ union ibmveth_buf_desc rxq_desc;
+
+ ibmveth_debug_printk("open starting\n");
+
+ rxq_entries =
+ adapter->rx_buff_pool[0].size +
+ adapter->rx_buff_pool[1].size +
+ adapter->rx_buff_pool[2].size + 1;
+
+ 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);
+ 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);
+ return -ENOMEM;
+ }
+
+ adapter->buffer_list_dma = vio_map_single(adapter->vdev, adapter->buffer_list_addr, 4096, PCI_DMA_BIDIRECTIONAL);
+ adapter->filter_list_dma = vio_map_single(adapter->vdev, adapter->filter_list_addr, 4096, PCI_DMA_BIDIRECTIONAL);
+ adapter->rx_queue.queue_dma = vio_map_single(adapter->vdev, adapter->rx_queue.queue_addr, adapter->rx_queue.queue_len, PCI_DMA_BIDIRECTIONAL);
+
+ if((adapter->buffer_list_dma == NO_TCE) ||
+ (adapter->filter_list_dma == NO_TCE) ||
+ (adapter->rx_queue.queue_dma == NO_TCE)) {
+ ibmveth_error_printk("unable to map filter or buffer list pages\n");
+ ibmveth_cleanup(adapter);
+ return -ENOMEM;
+ }
+
+ adapter->rx_queue.index = 0;
+ adapter->rx_queue.num_slots = rxq_entries;
+ adapter->rx_queue.toggle = 1;
+
+ if(ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[0]) ||
+ ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[1]) ||
+ ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[2]))
+ {
+ ibmveth_error_printk("unable to allocate buffer pools\n");
+ ibmveth_cleanup(adapter);
+ return -ENOMEM;
+ }
+
+ memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
+ mac_address = mac_address >> 16;
+
+ rxq_desc.desc = 0;
+ rxq_desc.fields.valid = 1;
+ rxq_desc.fields.length = 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);
+
+
+ lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
+ adapter->buffer_list_dma,
+ rxq_desc.desc,
+ adapter->filter_list_dma,
+ 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%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
+ adapter->buffer_list_dma,
+ adapter->filter_list_dma,
+ rxq_desc.desc,
+ mac_address);
+ ibmveth_cleanup(adapter);
+ return -ENONET;
+ }
+
+ 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);
+ h_free_logical_lan(adapter->vdev->unit_address);
+ ibmveth_cleanup(adapter);
+ return rc;
+ }
+
+ netif_start_queue(netdev);
+
+ ibmveth_debug_printk("scheduling initial replenish cycle\n");
+ ibmveth_schedule_replenishing(adapter);
+
+ 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");
+
+ netif_stop_queue(netdev);
+
+ free_irq(netdev->irq, netdev);
+
+ cancel_delayed_work(&adapter->replenish_task);
+ flush_scheduled_work();
+
+ lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
+
+ 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 0;
+}
+
+static struct ethtool_ops netdev_ethtool_ops = {
+ .get_drvinfo = netdev_get_drvinfo,
+ .get_settings = netdev_get_settings,
+ .get_link = netdev_get_link,
+ .get_sg = ethtool_op_get_sg,
+ .get_tx_csum = ethtool_op_get_tx_csum,
+};
+
+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[IbmVethMaxSendFrags];
+ unsigned long lpar_rc;
+ int nfrags = 0, curfrag;
+
+ if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
+ adapter->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ memset(&desc, 0, sizeof(desc));
+
+ /* nfrags = number of frags after the initial fragment */
+ nfrags = skb_shinfo(skb)->nr_frags;
+
+ if(nfrags)
+ adapter->tx_multidesc_send++;
+
+ /* map the initial fragment */
+ desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
+ desc[0].fields.address = vio_map_single(adapter->vdev, skb->data, desc[0].fields.length, PCI_DMA_TODEVICE);
+ desc[0].fields.valid = 1;
+
+ if(desc[0].fields.address == NO_TCE) {
+ ibmveth_error_printk("tx: unable to map initial fragment\n");
+ adapter->tx_map_failed++;
+ adapter->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
+ curfrag = nfrags;
+
+ /* map fragments past the initial portion if there are any */
+ while(curfrag--) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
+ desc[curfrag+1].fields.address = vio_map_single(adapter->vdev,
+ page_address(frag->page) + frag->page_offset,
+ frag->size, PCI_DMA_TODEVICE);
+ desc[curfrag+1].fields.length = frag->size;
+ desc[curfrag+1].fields.valid = 1;
+
+ if(desc[curfrag+1].fields.address == NO_TCE) {
+ ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
+ adapter->tx_map_failed++;
+ adapter->stats.tx_dropped++;
+ /* Free all the mappings we just created */
+ while(curfrag < nfrags) {
+ vio_unmap_single(adapter->vdev,
+ desc[curfrag+1].fields.address,
+ desc[curfrag+1].fields.length,
+ PCI_DMA_TODEVICE);
+ curfrag++;
+ }
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+
+ /* send the frame. Arbitrarily set retrycount to 1024 */
+ unsigned long correlator = 0;
+ unsigned int retry_count = 1024;
+ do {
+ lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
+ desc[0].desc,
+ desc[1].desc,
+ desc[2].desc,
+ desc[3].desc,
+ desc[4].desc,
+ desc[5].desc,
+ correlator);
+ } while ((lpar_rc == H_Busy) && (retry_count--));
+
+ if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
+ int i;
+ ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
+ for(i = 0; i < 6; i++) {
+ ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
+ desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
+ }
+ adapter->tx_send_failed++;
+ adapter->stats.tx_dropped++;
+ } else {
+ adapter->stats.tx_packets++;
+ adapter->stats.tx_bytes += skb->len;
+ }
+
+ do {
+ vio_unmap_single(adapter->vdev, desc[nfrags].fields.address, desc[nfrags].fields.length, PCI_DMA_TODEVICE);
+ } while(--nfrags >= 0);
+
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+static int ibmveth_poll(struct net_device *netdev, int *budget)
+{
+ struct ibmveth_adapter *adapter = netdev->priv;
+ int max_frames_to_process = netdev->quota;
+ int frames_processed = 0;
+ int more_work = 1;
+ unsigned long lpar_rc;
+
+ restart_poll:
+ do {
+ struct net_device *netdev = adapter->netdev;
+
+ if(ibmveth_rxq_pending_buffer(adapter)) {
+ struct sk_buff *skb;
+
+ 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);
+ skb = ibmveth_rxq_get_buffer(adapter);
+
+ ibmveth_rxq_harvest_buffer(adapter);
+
+ skb_reserve(skb, offset);
+ skb_put(skb, length);
+ skb->dev = netdev;
+ skb->protocol = eth_type_trans(skb, netdev);
+
+ netif_receive_skb(skb); /* send it up */
+
+ adapter->stats.rx_packets++;
+ adapter->stats.rx_bytes += length;
+ frames_processed++;
+ }
+ } else {
+ more_work = 0;
+ }
+ } while(more_work && (frames_processed < max_frames_to_process));
+
+ ibmveth_schedule_replenishing(adapter);
+
+ if(more_work) {
+ /* more work to do - return that we are not done yet */
+ netdev->quota -= frames_processed;
+ *budget -= frames_processed;
+ return 1;
+ }
+
+ /* 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);
+
+ if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
+ {
+ lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
+ ibmveth_assert(lpar_rc == H_Success);
+ more_work = 1;
+ goto restart_poll;
+ }
+
+ netdev->quota -= frames_processed;
+ *budget -= frames_processed;
+
+ /* we really are done */
+ return 0;
+}
+
+static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
+{
+ struct net_device *netdev = dev_instance;
+ struct ibmveth_adapter *adapter = netdev->priv;
+ unsigned long lpar_rc;
+
+ if(netif_rx_schedule_prep(netdev)) {
+ lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
+ ibmveth_assert(lpar_rc == H_Success);
+ __netif_rx_schedule(netdev);
+ }
+ return IRQ_HANDLED;
+}
+
+static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
+{
+ struct ibmveth_adapter *adapter = dev->priv;
+ return &adapter->stats;
+}
+
+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)
+{
+ if ((new_mtu < 68) || (new_mtu > (1<<20)))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
+{
+ int rc;
+ struct net_device *netdev;
+ struct ibmveth_adapter *adapter;
+
+ unsigned int *mac_addr_p;
+ unsigned int *mcastFilterSize_p;
+
+
+ ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%lx\n",
+ dev->unit_address);
+
+ mac_addr_p = (unsigned int *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
+ if(!mac_addr_p) {
+ ibmveth_error_printk("Can't find VETH_MAC_ADDR attribute\n");
+ return 0;
+ }
+
+ mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
+ if(!mcastFilterSize_p) {
+ ibmveth_error_printk("Can't find VETH_MCAST_FILTER_SIZE attribute\n");
+ return 0;
+ }
+
+ netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
+
+ if(!netdev)
+ return -ENOMEM;
+
+ SET_MODULE_OWNER(netdev);
+
+ adapter = netdev->priv;
+ memset(adapter, 0, sizeof(adapter));
+ dev->driver_data = netdev;
+
+ adapter->vdev = dev;
+ adapter->netdev = netdev;
+ adapter->mcastFilterSize= *mcastFilterSize_p;
+
+ /* 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 */
+
+ while (*((char*)mac_addr_p) != (char)(0x02))
+ ((char*)mac_addr_p)++;
+
+ adapter->mac_addr = 0;
+ memcpy(&adapter->mac_addr, mac_addr_p, 6);
+
+ adapter->liobn = dev->tce_table->index;
+
+ netdev->irq = dev->irq;
+ netdev->open = ibmveth_open;
+ netdev->poll = ibmveth_poll;
+ netdev->weight = 16;
+ netdev->stop = ibmveth_close;
+ netdev->hard_start_xmit = ibmveth_start_xmit;
+ netdev->get_stats = ibmveth_get_stats;
+ 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;
+
+ memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
+
+ ibmveth_init_buffer_pool(&adapter->rx_buff_pool[0], 0, IbmVethPool0DftCnt, IbmVethPool0DftSize);
+ ibmveth_init_buffer_pool(&adapter->rx_buff_pool[1], 1, IbmVethPool1DftCnt, IbmVethPool1DftSize);
+ ibmveth_init_buffer_pool(&adapter->rx_buff_pool[2], 2, IbmVethPool2DftCnt, IbmVethPool2DftSize);
+
+ ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
+
+ INIT_WORK(&adapter->replenish_task, (void*)ibmveth_replenish_task, (void*)adapter);
+
+ adapter->buffer_list_dma = NO_TCE;
+ adapter->filter_list_dma = NO_TCE;
+ adapter->rx_queue.queue_dma = NO_TCE;
+
+ atomic_set(&adapter->not_replenishing, 1);
+
+ ibmveth_debug_printk("registering netdev...\n");
+
+ 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->driver_data;
+ struct ibmveth_adapter *adapter = netdev->priv;
+
+ 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 = create_proc_entry(IBMVETH_PROC_DIR, S_IFDIR, proc_net);
+ if (ibmveth_proc_dir) {
+ SET_MODULE_OWNER(ibmveth_proc_dir);
+ }
+}
+
+static void ibmveth_proc_unregister_driver(void)
+{
+ remove_proc_entry(IBMVETH_PROC_DIR, 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) ;
+
+ seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
+
+ seq_printf(seq, "Unit Address: 0x%lx\n", adapter->vdev->unit_address);
+ seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn);
+ seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
+ current_mac[0], current_mac[1], current_mac[2],
+ current_mac[3], current_mac[4], current_mac[5]);
+ seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
+ firmware_mac[0], firmware_mac[1], firmware_mac[2],
+ firmware_mac[3], firmware_mac[4], firmware_mac[5]);
+
+ seq_printf(seq, "\nAdapter Statistics:\n");
+ seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
+ seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
+ seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
+ seq_printf(seq, " 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 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) {
+ entry = create_proc_entry(adapter->netdev->name, 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;
+ SET_MODULE_OWNER(entry);
+ }
+ }
+ return;
+}
+
+static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
+{
+ if (ibmveth_proc_dir) {
+ remove_proc_entry(adapter->netdev->name, 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 vio_device_id ibmveth_device_table[] __devinitdata= {
+ { "network", "IBM,l-lan"},
+ { 0,}
+};
+
+MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
+
+static struct vio_driver ibmveth_driver = {
+ .name = (char *)ibmveth_driver_name,
+ .id_table = ibmveth_device_table,
+ .probe = ibmveth_probe,
+ .remove = ibmveth_remove
+};
+
+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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