drivers/net/ibmveth.c

   1 /**************************************************************************/
   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   - remove frag processing code - no longer needed
  32   - add support for sysfs
  33   - possibly remove procfs support
  34 */
  35
  36 #include <linux/config.h>
  37 #include <linux/module.h>
  38 #include <linux/version.h>
  39 #include <linux/types.h>
  40 #include <linux/errno.h>
  41 #include <linux/ioport.h>
  42 #include <linux/dma-mapping.h>
  43 #include <linux/kernel.h>
  44 #include <linux/netdevice.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/skbuff.h>
  47 #include <linux/init.h>
  48 #include <linux/delay.h>
  49 #include <linux/mm.h>
  50 #include <linux/ethtool.h>
  51 #include <linux/proc_fs.h>
  52 #include <asm/semaphore.h>
  53 #include <asm/hvcall.h>
  54 #include <asm/atomic.h>
  55 #include <asm/iommu.h>
  56 #include <asm/vio.h>
  57 #include <asm/uaccess.h>
  58 #include <linux/seq_file.h>
  59
  60 #include "ibmveth.h"
  61
  62 #define DEBUG 1
  63
  64 #define ibmveth_printk(fmt, args...) \
  65   printk(KERN_INFO "%s: " fmt, __FILE__, ## args)
  66
  67 #define ibmveth_error_printk(fmt, args...) \
  68   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  69
  70 #ifdef DEBUG
  71 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
  72   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
  73 #define ibmveth_debug_printk(fmt, args...) \
  74   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  75 #define ibmveth_assert(expr) \
  76   if(!(expr)) {                                   \
  77     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
  78     BUG(); \
  79   }
  80 #else
  81 #define ibmveth_debug_printk_no_adapter(fmt, args...)
  82 #define ibmveth_debug_printk(fmt, args...)
  83 #define ibmveth_assert(expr)
  84 #endif
  85
  86 static int ibmveth_open(struct net_device *dev);
  87 static int ibmveth_close(struct net_device *dev);
  88 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  89 static int ibmveth_poll(struct net_device *dev, int *budget);
  90 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
  91 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
  92 static void ibmveth_set_multicast_list(struct net_device *dev);
  93 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
  94 static void ibmveth_proc_register_driver(void);
  95 static void ibmveth_proc_unregister_driver(void);
  96 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
  97 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
  98 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
  99 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter*);
 100
 101 #ifdef CONFIG_PROC_FS
 102 #define IBMVETH_PROC_DIR "ibmveth"
 103 static struct proc_dir_entry *ibmveth_proc_dir;
 104 #endif
 105
 106 static const char ibmveth_driver_name[] = "ibmveth";
 107 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 108 #define ibmveth_driver_version "1.03"
 109
 110 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 111 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 112 MODULE_LICENSE("GPL");
 113 MODULE_VERSION(ibmveth_driver_version);
 114
 115 /* simple methods of getting data from the current rxq entry */
 116 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 117 {
 118         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 119 }
 120
 121 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 122 {
 123         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 124 }
 125
 126 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 127 {
 128         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 129 }
 130
 131 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 132 {
 133         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 134 }
 135
 136 /* setup the initial settings for a buffer pool */
 137 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size)
 138 {
 139         pool->size = pool_size;
 140         pool->index = pool_index;
 141         pool->buff_size = buff_size;
 142         pool->threshold = pool_size / 2;
 143 }
 144
 145 /* allocate and setup an buffer pool - called during open */
 146 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 147 {
 148         int i;
 149
 150         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
 151
 152         if(!pool->free_map) {
 153                 return -1;
 154         }
 155
 156         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
 157         if(!pool->dma_addr) {
 158                 kfree(pool->free_map);
 159                 pool->free_map = NULL;
 160                 return -1;
 161         }
 162
 163         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
 164
 165         if(!pool->skbuff) {
 166                 kfree(pool->dma_addr);
 167                 pool->dma_addr = NULL;
 168
 169                 kfree(pool->free_map);
 170                 pool->free_map = NULL;
 171                 return -1;
 172         }
 173
 174         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
 175         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
 176
 177         for(i = 0; i < pool->size; ++i) {
 178                 pool->free_map[i] = i;
 179         }
 180
 181         atomic_set(&pool->available, 0);
 182         pool->producer_index = 0;
 183         pool->consumer_index = 0;
 184
 185         return 0;
 186 }
 187
 188 /* replenish the buffers for a pool.  note that we don't need to
 189  * skb_reserve these since they are used for incoming...
 190  */
 191 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 192 {
 193         u32 i;
 194         u32 count = pool->size - atomic_read(&pool->available);
 195         u32 buffers_added = 0;
 196
 197         mb();
 198
 199         for(i = 0; i < count; ++i) {
 200                 struct sk_buff *skb;
 201                 unsigned int free_index, index;
 202                 u64 correlator;
 203                 union ibmveth_buf_desc desc;
 204                 unsigned long lpar_rc;
 205                 dma_addr_t dma_addr;
 206
 207                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 208
 209                 if(!skb) {
 210                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 211                         adapter->replenish_no_mem++;
 212                         break;
 213                 }
 214
 215                 free_index = pool->consumer_index++ % pool->size;
 216                 index = pool->free_map[free_index];
 217
 218                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
 219                 ibmveth_assert(pool->skbuff[index] == NULL);
 220
 221                 dma_addr = vio_map_single(adapter->vdev, skb->data, pool->buff_size, DMA_FROM_DEVICE);
 222
 223                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 224                 pool->dma_addr[index] = dma_addr;
 225                 pool->skbuff[index] = skb;
 226
 227                 correlator = ((u64)pool->index << 32) | index;
 228                 *(u64*)skb->data = correlator;
 229
 230                 desc.desc = 0;
 231                 desc.fields.valid = 1;
 232                 desc.fields.length = pool->buff_size;
 233                 desc.fields.address = dma_addr;
 234
 235                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 236
 237                 if(lpar_rc != H_Success) {
 238                         pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 239                         pool->skbuff[index] = NULL;
 240                         pool->consumer_index--;
 241                         vio_unmap_single(adapter->vdev, pool->dma_addr[index], pool->buff_size, DMA_FROM_DEVICE);
 242                         dev_kfree_skb_any(skb);
 243                         adapter->replenish_add_buff_failure++;
 244                         break;
 245                 } else {
 246                         buffers_added++;
 247                         adapter->replenish_add_buff_success++;
 248                 }
 249         }
 250
 251         mb();
 252         atomic_add(buffers_added, &(pool->available));
 253 }
 254
 255 /* check if replenishing is needed.  */
 256 static inline int ibmveth_is_replenishing_needed(struct ibmveth_adapter *adapter)
 257 {
 258         return ((atomic_read(&adapter->rx_buff_pool[0].available) < adapter->rx_buff_pool[0].threshold) ||
 259                 (atomic_read(&adapter->rx_buff_pool[1].available) < adapter->rx_buff_pool[1].threshold) ||
 260                 (atomic_read(&adapter->rx_buff_pool[2].available) < adapter->rx_buff_pool[2].threshold));
 261 }
 262
 263 /* kick the replenish tasklet if we need replenishing and it isn't already running */
 264 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter *adapter)
 265 {
 266         if(ibmveth_is_replenishing_needed(adapter) &&
 267            (atomic_dec_if_positive(&adapter->not_replenishing) == 0)) {
 268                 schedule_work(&adapter->replenish_task);
 269         }
 270 }
 271
 272 /* replenish tasklet routine */
 273 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 274 {
 275         adapter->replenish_task_cycles++;
 276
 277         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
 278         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
 279         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
 280
 281         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 282
 283         atomic_inc(&adapter->not_replenishing);
 284
 285         ibmveth_schedule_replenishing(adapter);
 286 }
 287
 288 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 289 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 290 {
 291         int i;
 292
 293         if(pool->free_map) {
 294                 kfree(pool->free_map);
 295                 pool->free_map  = NULL;
 296         }
 297
 298         if(pool->skbuff && pool->dma_addr) {
 299                 for(i = 0; i < pool->size; ++i) {
 300                         struct sk_buff *skb = pool->skbuff[i];
 301                         if(skb) {
 302                                 vio_unmap_single(adapter->vdev,
 303                                                  pool->dma_addr[i],
 304                                                  pool->buff_size,
 305                                                  DMA_FROM_DEVICE);
 306                                 dev_kfree_skb_any(skb);
 307                                 pool->skbuff[i] = NULL;
 308                         }
 309                 }
 310         }
 311
 312         if(pool->dma_addr) {
 313                 kfree(pool->dma_addr);
 314                 pool->dma_addr = NULL;
 315         }
 316
 317         if(pool->skbuff) {
 318                 kfree(pool->skbuff);
 319                 pool->skbuff = NULL;
 320         }
 321 }
 322
 323 /* remove a buffer from a pool */
 324 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 325 {
 326         unsigned int pool  = correlator >> 32;
 327         unsigned int index = correlator & 0xffffffffUL;
 328         unsigned int free_index;
 329         struct sk_buff *skb;
 330
 331         ibmveth_assert(pool < IbmVethNumBufferPools);
 332         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 333
 334         skb = adapter->rx_buff_pool[pool].skbuff[index];
 335
 336         ibmveth_assert(skb != NULL);
 337
 338         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 339
 340         vio_unmap_single(adapter->vdev,
 341                          adapter->rx_buff_pool[pool].dma_addr[index],
 342                          adapter->rx_buff_pool[pool].buff_size,
 343                          DMA_FROM_DEVICE);
 344
 345         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 346         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 347
 348         mb();
 349
 350         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 351 }
 352
 353 /* get the current buffer on the rx queue */
 354 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 355 {
 356         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 357         unsigned int pool = correlator >> 32;
 358         unsigned int index = correlator & 0xffffffffUL;
 359
 360         ibmveth_assert(pool < IbmVethNumBufferPools);
 361         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 362
 363         return adapter->rx_buff_pool[pool].skbuff[index];
 364 }
 365
 366 /* recycle the current buffer on the rx queue */
 367 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 368 {
 369         u32 q_index = adapter->rx_queue.index;
 370         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 371         unsigned int pool = correlator >> 32;
 372         unsigned int index = correlator & 0xffffffffUL;
 373         union ibmveth_buf_desc desc;
 374         unsigned long lpar_rc;
 375
 376         ibmveth_assert(pool < IbmVethNumBufferPools);
 377         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 378
 379         desc.desc = 0;
 380         desc.fields.valid = 1;
 381         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 382         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 383
 384         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 385
 386         if(lpar_rc != H_Success) {
 387                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 388                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 389         }
 390
 391         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 392                 adapter->rx_queue.index = 0;
 393                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 394         }
 395 }
 396
 397 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 398 {
 399         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 400
 401         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 402                 adapter->rx_queue.index = 0;
 403                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 404         }
 405 }
 406
 407 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 408 {
 409         if(adapter->buffer_list_addr != NULL) {
 410                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 411                         vio_unmap_single(adapter->vdev, adapter->buffer_list_dma, 4096, DMA_BIDIRECTIONAL);
 412                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 413                 }
 414                 free_page((unsigned long)adapter->buffer_list_addr);
 415                 adapter->buffer_list_addr = NULL;
 416         }
 417
 418         if(adapter->filter_list_addr != NULL) {
 419                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 420                         vio_unmap_single(adapter->vdev, adapter->filter_list_dma, 4096, DMA_BIDIRECTIONAL);
 421                         adapter->filter_list_dma = DMA_ERROR_CODE;
 422                 }
 423                 free_page((unsigned long)adapter->filter_list_addr);
 424                 adapter->filter_list_addr = NULL;
 425         }
 426
 427         if(adapter->rx_queue.queue_addr != NULL) {
 428                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 429                         vio_unmap_single(adapter->vdev, adapter->rx_queue.queue_dma, adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 430                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 431                 }
 432                 kfree(adapter->rx_queue.queue_addr);
 433                 adapter->rx_queue.queue_addr = NULL;
 434         }
 435
 436         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
 437         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
 438         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
 439 }
 440
 441 static int ibmveth_open(struct net_device *netdev)
 442 {
 443         struct ibmveth_adapter *adapter = netdev->priv;
 444         u64 mac_address = 0;
 445         int rxq_entries;
 446         unsigned long lpar_rc;
 447         int rc;
 448         union ibmveth_buf_desc rxq_desc;
 449
 450         ibmveth_debug_printk("open starting\n");
 451
 452         rxq_entries =
 453                 adapter->rx_buff_pool[0].size +
 454                 adapter->rx_buff_pool[1].size +
 455                 adapter->rx_buff_pool[2].size + 1;
 456
 457         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 458         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 459
 460         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 461                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 462                 ibmveth_cleanup(adapter);
 463                 return -ENOMEM;
 464         }
 465
 466         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 467         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 468
 469         if(!adapter->rx_queue.queue_addr) {
 470                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 471                 ibmveth_cleanup(adapter);
 472                 return -ENOMEM;
 473         }
 474
 475         adapter->buffer_list_dma = vio_map_single(adapter->vdev, adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 476         adapter->filter_list_dma = vio_map_single(adapter->vdev, adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 477         adapter->rx_queue.queue_dma = vio_map_single(adapter->vdev, adapter->rx_queue.queue_addr, adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 478
 479         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 480            (dma_mapping_error(adapter->filter_list_dma)) ||
 481            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 482                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 483                 ibmveth_cleanup(adapter);
 484                 return -ENOMEM;
 485         }
 486
 487         adapter->rx_queue.index = 0;
 488         adapter->rx_queue.num_slots = rxq_entries;
 489         adapter->rx_queue.toggle = 1;
 490
 491         if(ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[0]) ||
 492            ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[1]) ||
 493            ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[2]))
 494         {
 495                 ibmveth_error_printk("unable to allocate buffer pools\n");
 496                 ibmveth_cleanup(adapter);
 497                 return -ENOMEM;
 498         }
 499
 500         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 501         mac_address = mac_address >> 16;
 502
 503         rxq_desc.desc = 0;
 504         rxq_desc.fields.valid = 1;
 505         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 506         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 507
 508         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 509         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 510         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 511
 512
 513         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 514                                          adapter->buffer_list_dma,
 515                                          rxq_desc.desc,
 516                                          adapter->filter_list_dma,
 517                                          mac_address);
 518
 519         if(lpar_rc != H_Success) {
 520                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 521                 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
 522                                      adapter->buffer_list_dma,
 523                                      adapter->filter_list_dma,
 524                                      rxq_desc.desc,
 525                                      mac_address);
 526                 ibmveth_cleanup(adapter);
 527                 return -ENONET;
 528         }
 529
 530         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 531         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 532                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 533                 do {
 534                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 535                 } while (H_isLongBusy(rc) || (rc == H_Busy));
 536
 537                 ibmveth_cleanup(adapter);
 538                 return rc;
 539         }
 540
 541         netif_start_queue(netdev);
 542
 543         ibmveth_debug_printk("scheduling initial replenish cycle\n");
 544         ibmveth_schedule_replenishing(adapter);
 545
 546         ibmveth_debug_printk("open complete\n");
 547
 548         return 0;
 549 }
 550
 551 static int ibmveth_close(struct net_device *netdev)
 552 {
 553         struct ibmveth_adapter *adapter = netdev->priv;
 554         long lpar_rc;
 555
 556         ibmveth_debug_printk("close starting\n");
 557
 558         netif_stop_queue(netdev);
 559
 560         free_irq(netdev->irq, netdev);
 561
 562         cancel_delayed_work(&adapter->replenish_task);
 563         flush_scheduled_work();
 564
 565         do {
 566                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 567         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
 568
 569         if(lpar_rc != H_Success)
 570         {
 571                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 572                                      lpar_rc);
 573         }
 574
 575         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 576
 577         ibmveth_cleanup(adapter);
 578
 579         ibmveth_debug_printk("close complete\n");
 580
 581         return 0;
 582 }
 583
 584 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 585         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 586         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 587         cmd->speed = SPEED_1000;
 588         cmd->duplex = DUPLEX_FULL;
 589         cmd->port = PORT_FIBRE;
 590         cmd->phy_address = 0;
 591         cmd->transceiver = XCVR_INTERNAL;
 592         cmd->autoneg = AUTONEG_ENABLE;
 593         cmd->maxtxpkt = 0;
 594         cmd->maxrxpkt = 1;
 595         return 0;
 596 }
 597
 598 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 599         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 600         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 601 }
 602
 603 static u32 netdev_get_link(struct net_device *dev) {
 604         return 1;
 605 }
 606
 607 static struct ethtool_ops netdev_ethtool_ops = {
 608         .get_drvinfo            = netdev_get_drvinfo,
 609         .get_settings           = netdev_get_settings,
 610         .get_link               = netdev_get_link,
 611         .get_sg                 = ethtool_op_get_sg,
 612         .get_tx_csum            = ethtool_op_get_tx_csum,
 613 };
 614
 615 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 616 {
 617         return -EOPNOTSUPP;
 618 }
 619
 620 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 621
 622 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 623 {
 624         struct ibmveth_adapter *adapter = netdev->priv;
 625         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 626         unsigned long lpar_rc;
 627         int nfrags = 0, curfrag;
 628         unsigned long correlator;
 629         unsigned int retry_count;
 630
 631         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 632                 adapter->stats.tx_dropped++;
 633                 dev_kfree_skb(skb);
 634                 return 0;
 635         }
 636
 637         memset(&desc, 0, sizeof(desc));
 638
 639         /* nfrags = number of frags after the initial fragment */
 640         nfrags = skb_shinfo(skb)->nr_frags;
 641
 642         if(nfrags)
 643                 adapter->tx_multidesc_send++;
 644
 645         /* map the initial fragment */
 646         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 647         desc[0].fields.address = vio_map_single(adapter->vdev, skb->data,
 648                                         desc[0].fields.length, DMA_TO_DEVICE);
 649         desc[0].fields.valid   = 1;
 650
 651         if(dma_mapping_error(desc[0].fields.address)) {
 652                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 653                 adapter->tx_map_failed++;
 654                 adapter->stats.tx_dropped++;
 655                 dev_kfree_skb(skb);
 656                 return 0;
 657         }
 658
 659         curfrag = nfrags;
 660
 661         /* map fragments past the initial portion if there are any */
 662         while(curfrag--) {
 663                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 664                 desc[curfrag+1].fields.address
 665                         = vio_map_single(adapter->vdev,
 666                                 page_address(frag->page) + frag->page_offset,
 667                                 frag->size, DMA_TO_DEVICE);
 668                 desc[curfrag+1].fields.length = frag->size;
 669                 desc[curfrag+1].fields.valid  = 1;
 670
 671                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 672                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 673                         adapter->tx_map_failed++;
 674                         adapter->stats.tx_dropped++;
 675                         /* Free all the mappings we just created */
 676                         while(curfrag < nfrags) {
 677                                 vio_unmap_single(adapter->vdev,
 678                                                  desc[curfrag+1].fields.address,
 679                                                  desc[curfrag+1].fields.length,
 680                                                  DMA_TO_DEVICE);
 681                                 curfrag++;
 682                         }
 683                         dev_kfree_skb(skb);
 684                         return 0;
 685                 }
 686         }
 687
 688         /* send the frame. Arbitrarily set retrycount to 1024 */
 689         correlator = 0;
 690         retry_count = 1024;
 691         do {
 692                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 693                                              desc[0].desc,
 694                                              desc[1].desc,
 695                                              desc[2].desc,
 696                                              desc[3].desc,
 697                                              desc[4].desc,
 698                                              desc[5].desc,
 699                                              correlator);
 700         } while ((lpar_rc == H_Busy) && (retry_count--));
 701
 702         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
 703                 int i;
 704                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 705                 for(i = 0; i < 6; i++) {
 706                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 707                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 708                 }
 709                 adapter->tx_send_failed++;
 710                 adapter->stats.tx_dropped++;
 711         } else {
 712                 adapter->stats.tx_packets++;
 713                 adapter->stats.tx_bytes += skb->len;
 714         }
 715
 716         do {
 717                 vio_unmap_single(adapter->vdev, desc[nfrags].fields.address, desc[nfrags].fields.length, DMA_TO_DEVICE);
 718         } while(--nfrags >= 0);
 719
 720         dev_kfree_skb(skb);
 721         return 0;
 722 }
 723
 724 static int ibmveth_poll(struct net_device *netdev, int *budget)
 725 {
 726         struct ibmveth_adapter *adapter = netdev->priv;
 727         int max_frames_to_process = netdev->quota;
 728         int frames_processed = 0;
 729         int more_work = 1;
 730         unsigned long lpar_rc;
 731
 732  restart_poll:
 733         do {
 734                 struct net_device *netdev = adapter->netdev;
 735
 736                 if(ibmveth_rxq_pending_buffer(adapter)) {
 737                         struct sk_buff *skb;
 738
 739                         rmb();
 740
 741                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 742                                 wmb(); /* suggested by larson1 */
 743                                 adapter->rx_invalid_buffer++;
 744                                 ibmveth_debug_printk("recycling invalid buffer\n");
 745                                 ibmveth_rxq_recycle_buffer(adapter);
 746                         } else {
 747                                 int length = ibmveth_rxq_frame_length(adapter);
 748                                 int offset = ibmveth_rxq_frame_offset(adapter);
 749                                 skb = ibmveth_rxq_get_buffer(adapter);
 750
 751                                 ibmveth_rxq_harvest_buffer(adapter);
 752
 753                                 skb_reserve(skb, offset);
 754                                 skb_put(skb, length);
 755                                 skb->dev = netdev;
 756                                 skb->protocol = eth_type_trans(skb, netdev);
 757
 758                                 netif_receive_skb(skb); /* send it up */
 759
 760                                 adapter->stats.rx_packets++;
 761                                 adapter->stats.rx_bytes += length;
 762                                 frames_processed++;
 763                         }
 764                 } else {
 765                         more_work = 0;
 766                 }
 767         } while(more_work && (frames_processed < max_frames_to_process));
 768
 769         ibmveth_schedule_replenishing(adapter);
 770
 771         if(more_work) {
 772                 /* more work to do - return that we are not done yet */
 773                 netdev->quota -= frames_processed;
 774                 *budget -= frames_processed;
 775                 return 1;
 776         }
 777
 778         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 779         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 780
 781         ibmveth_assert(lpar_rc == H_Success);
 782
 783         netif_rx_complete(netdev);
 784
 785         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 786         {
 787                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 788                 ibmveth_assert(lpar_rc == H_Success);
 789                 more_work = 1;
 790                 goto restart_poll;
 791         }
 792
 793         netdev->quota -= frames_processed;
 794         *budget -= frames_processed;
 795
 796         /* we really are done */
 797         return 0;
 798 }
 799
 800 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 801 {
 802         struct net_device *netdev = dev_instance;
 803         struct ibmveth_adapter *adapter = netdev->priv;
 804         unsigned long lpar_rc;
 805
 806         if(netif_rx_schedule_prep(netdev)) {
 807                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 808                 ibmveth_assert(lpar_rc == H_Success);
 809                 __netif_rx_schedule(netdev);
 810         }
 811         return IRQ_HANDLED;
 812 }
 813
 814 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 815 {
 816         struct ibmveth_adapter *adapter = dev->priv;
 817         return &adapter->stats;
 818 }
 819
 820 static void ibmveth_set_multicast_list(struct net_device *netdev)
 821 {
 822         struct ibmveth_adapter *adapter = netdev->priv;
 823         unsigned long lpar_rc;
 824
 825         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 826                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 827                                            IbmVethMcastEnableRecv |
 828                                            IbmVethMcastDisableFiltering,
 829                                            0);
 830                 if(lpar_rc != H_Success) {
 831                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 832                 }
 833         } else {
 834                 struct dev_mc_list *mclist = netdev->mc_list;
 835                 int i;
 836                 /* clear the filter table & disable filtering */
 837                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 838                                            IbmVethMcastEnableRecv |
 839                                            IbmVethMcastDisableFiltering |
 840                                            IbmVethMcastClearFilterTable,
 841                                            0);
 842                 if(lpar_rc != H_Success) {
 843                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 844                 }
 845                 /* add the addresses to the filter table */
 846                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 847                         // add the multicast address to the filter table
 848                         unsigned long mcast_addr = 0;
 849                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 850                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 851                                                    IbmVethMcastAddFilter,
 852                                                    mcast_addr);
 853                         if(lpar_rc != H_Success) {
 854                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 855                         }
 856                 }
 857
 858                 /* re-enable filtering */
 859                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 860                                            IbmVethMcastEnableFiltering,
 861                                            0);
 862                 if(lpar_rc != H_Success) {
 863                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 864                 }
 865         }
 866 }
 867
 868 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 869 {
 870         if ((new_mtu < 68) || (new_mtu > (1<<20)))
 871                 return -EINVAL;
 872         dev->mtu = new_mtu;
 873         return 0;
 874 }
 875
 876 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 877 {
 878         int rc;
 879         struct net_device *netdev;
 880         struct ibmveth_adapter *adapter;
 881
 882         unsigned char *mac_addr_p;
 883         unsigned int *mcastFilterSize_p;
 884
 885
 886         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 887                                         dev->unit_address);
 888
 889         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 890         if(!mac_addr_p) {
 891                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 892                                 "attribute\n", __FILE__, __LINE__);
 893                 return 0;
 894         }
 895
 896         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 897         if(!mcastFilterSize_p) {
 898                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 899                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 900                                 __FILE__, __LINE__);
 901                 return 0;
 902         }
 903
 904         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 905
 906         if(!netdev)
 907                 return -ENOMEM;
 908
 909         SET_MODULE_OWNER(netdev);
 910
 911         adapter = netdev->priv;
 912         memset(adapter, 0, sizeof(adapter));
 913         dev->dev.driver_data = netdev;
 914
 915         adapter->vdev = dev;
 916         adapter->netdev = netdev;
 917         adapter->mcastFilterSize= *mcastFilterSize_p;
 918
 919         /*      Some older boxes running PHYP non-natively have an OF that
 920                 returns a 8-byte local-mac-address field (and the first
 921                 2 bytes have to be ignored) while newer boxes' OF return
 922                 a 6-byte field. Note that IEEE 1275 specifies that
 923                 local-mac-address must be a 6-byte field.
 924                 The RPA doc specifies that the first byte must be 10b, so
 925                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 926
 927         if ((*mac_addr_p & 0x3) != 0x02)
 928                 mac_addr_p += 2;
 929
 930         adapter->mac_addr = 0;
 931         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 932
 933         adapter->liobn = dev->iommu_table->it_index;
 934
 935         netdev->irq = dev->irq;
 936         netdev->open               = ibmveth_open;
 937         netdev->poll               = ibmveth_poll;
 938         netdev->weight             = 16;
 939         netdev->stop               = ibmveth_close;
 940         netdev->hard_start_xmit    = ibmveth_start_xmit;
 941         netdev->get_stats          = ibmveth_get_stats;
 942         netdev->set_multicast_list = ibmveth_set_multicast_list;
 943         netdev->do_ioctl           = ibmveth_ioctl;
 944         netdev->ethtool_ops           = &netdev_ethtool_ops;
 945         netdev->change_mtu         = ibmveth_change_mtu;
 946         SET_NETDEV_DEV(netdev, &dev->dev);
 947
 948         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 949
 950         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[0], 0, IbmVethPool0DftCnt, IbmVethPool0DftSize);
 951         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[1], 1, IbmVethPool1DftCnt, IbmVethPool1DftSize);
 952         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[2], 2, IbmVethPool2DftCnt, IbmVethPool2DftSize);
 953
 954         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
 955
 956         INIT_WORK(&adapter->replenish_task, (void*)ibmveth_replenish_task, (void*)adapter);
 957
 958         adapter->buffer_list_dma = DMA_ERROR_CODE;
 959         adapter->filter_list_dma = DMA_ERROR_CODE;
 960         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 961
 962         atomic_set(&adapter->not_replenishing, 1);
 963
 964         ibmveth_debug_printk("registering netdev...\n");
 965
 966         rc = register_netdev(netdev);
 967
 968         if(rc) {
 969                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
 970                 free_netdev(netdev);
 971                 return rc;
 972         }
 973
 974         ibmveth_debug_printk("registered\n");
 975
 976         ibmveth_proc_register_adapter(adapter);
 977
 978         return 0;
 979 }
 980
 981 static int __devexit ibmveth_remove(struct vio_dev *dev)
 982 {
 983         struct net_device *netdev = dev->dev.driver_data;
 984         struct ibmveth_adapter *adapter = netdev->priv;
 985
 986         unregister_netdev(netdev);
 987
 988         ibmveth_proc_unregister_adapter(adapter);
 989
 990         free_netdev(netdev);
 991         return 0;
 992 }
 993
 994 #ifdef CONFIG_PROC_FS
 995 static void ibmveth_proc_register_driver(void)
 996 {
 997         ibmveth_proc_dir = create_proc_entry(IBMVETH_PROC_DIR, S_IFDIR, proc_net);
 998         if (ibmveth_proc_dir) {
 999                 SET_MODULE_OWNER(ibmveth_proc_dir);
1000         }
1001 }
1002
1003 static void ibmveth_proc_unregister_driver(void)
1004 {
1005         remove_proc_entry(IBMVETH_PROC_DIR, proc_net);
1006 }
1007
1008 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1009 {
1010         if (*pos == 0) {
1011                 return (void *)1;
1012         } else {
1013                 return NULL;
1014         }
1015 }
1016
1017 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1018 {
1019         ++*pos;
1020         return NULL;
1021 }
1022
1023 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1024 {
1025 }
1026
1027 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1028 {
1029         struct ibmveth_adapter *adapter = seq->private;
1030         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1031         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1032
1033         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1034
1035         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1036         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1037         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1038                    current_mac[0], current_mac[1], current_mac[2],
1039                    current_mac[3], current_mac[4], current_mac[5]);
1040         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1041                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1042                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1043
1044         seq_printf(seq, "\nAdapter Statistics:\n");
1045         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1046         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1047         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1048         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1049         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1050         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1051         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1052         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1053         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1054         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1055
1056         return 0;
1057 }
1058 static struct seq_operations ibmveth_seq_ops = {
1059         .start = ibmveth_seq_start,
1060         .next  = ibmveth_seq_next,
1061         .stop  = ibmveth_seq_stop,
1062         .show  = ibmveth_seq_show,
1063 };
1064
1065 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1066 {
1067         struct seq_file *seq;
1068         struct proc_dir_entry *proc;
1069         int rc;
1070
1071         rc = seq_open(file, &ibmveth_seq_ops);
1072         if (!rc) {
1073                 /* recover the pointer buried in proc_dir_entry data */
1074                 seq = file->private_data;
1075                 proc = PDE(inode);
1076                 seq->private = proc->data;
1077         }
1078         return rc;
1079 }
1080
1081 static struct file_operations ibmveth_proc_fops = {
1082         .owner   = THIS_MODULE,
1083         .open    = ibmveth_proc_open,
1084         .read    = seq_read,
1085         .llseek  = seq_lseek,
1086         .release = seq_release,
1087 };
1088
1089 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1090 {
1091         struct proc_dir_entry *entry;
1092         if (ibmveth_proc_dir) {
1093                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1094                 if (!entry) {
1095                         ibmveth_error_printk("Cannot create adapter proc entry");
1096                 } else {
1097                         entry->data = (void *) adapter;
1098                         entry->proc_fops = &ibmveth_proc_fops;
1099                         SET_MODULE_OWNER(entry);
1100                 }
1101         }
1102         return;
1103 }
1104
1105 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1106 {
1107         if (ibmveth_proc_dir) {
1108                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1109         }
1110 }
1111
1112 #else /* CONFIG_PROC_FS */
1113 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1114 {
1115 }
1116
1117 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1118 {
1119 }
1120 static void ibmveth_proc_register_driver(void)
1121 {
1122 }
1123
1124 static void ibmveth_proc_unregister_driver(void)
1125 {
1126 }
1127 #endif /* CONFIG_PROC_FS */
1128
1129 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1130         { "network", "IBM,l-lan"},
1131         { 0,}
1132 };
1133
1134 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1135
1136 static struct vio_driver ibmveth_driver = {
1137         .name        = (char *)ibmveth_driver_name,
1138         .id_table    = ibmveth_device_table,
1139         .probe       = ibmveth_probe,
1140         .remove      = ibmveth_remove
1141 };
1142
1143 static int __init ibmveth_module_init(void)
1144 {
1145         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1146
1147         ibmveth_proc_register_driver();
1148
1149         return vio_register_driver(&ibmveth_driver);
1150 }
1151
1152 static void __exit ibmveth_module_exit(void)
1153 {
1154         vio_unregister_driver(&ibmveth_driver);
1155         ibmveth_proc_unregister_driver();
1156 }
1157
1158 module_init(ibmveth_module_init);
1159 module_exit(ibmveth_module_exit);