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 "net/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 = dma_map_single(&adapter->vdev->dev, skb->data,
 222                                 pool->buff_size, DMA_FROM_DEVICE);
 223
 224                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 225                 pool->dma_addr[index] = dma_addr;
 226                 pool->skbuff[index] = skb;
 227
 228                 correlator = ((u64)pool->index << 32) | index;
 229                 *(u64*)skb->data = correlator;
 230
 231                 desc.desc = 0;
 232                 desc.fields.valid = 1;
 233                 desc.fields.length = pool->buff_size;
 234                 desc.fields.address = dma_addr;
 235
 236                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 237
 238                 if(lpar_rc != H_Success) {
 239                         pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 240                         pool->skbuff[index] = NULL;
 241                         pool->consumer_index--;
 242                         dma_unmap_single(&adapter->vdev->dev,
 243                                         pool->dma_addr[index], pool->buff_size,
 244                                         DMA_FROM_DEVICE);
 245                         dev_kfree_skb_any(skb);
 246                         adapter->replenish_add_buff_failure++;
 247                         break;
 248                 } else {
 249                         buffers_added++;
 250                         adapter->replenish_add_buff_success++;
 251                 }
 252         }
 253
 254         mb();
 255         atomic_add(buffers_added, &(pool->available));
 256 }
 257
 258 /* check if replenishing is needed.  */
 259 static inline int ibmveth_is_replenishing_needed(struct ibmveth_adapter *adapter)
 260 {
 261         return ((atomic_read(&adapter->rx_buff_pool[0].available) < adapter->rx_buff_pool[0].threshold) ||
 262                 (atomic_read(&adapter->rx_buff_pool[1].available) < adapter->rx_buff_pool[1].threshold) ||
 263                 (atomic_read(&adapter->rx_buff_pool[2].available) < adapter->rx_buff_pool[2].threshold));
 264 }
 265
 266 /* kick the replenish tasklet if we need replenishing and it isn't already running */
 267 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter *adapter)
 268 {
 269         if(ibmveth_is_replenishing_needed(adapter) &&
 270            (atomic_dec_if_positive(&adapter->not_replenishing) == 0)) {
 271                 schedule_work(&adapter->replenish_task);
 272         }
 273 }
 274
 275 /* replenish tasklet routine */
 276 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 277 {
 278         adapter->replenish_task_cycles++;
 279
 280         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
 281         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
 282         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
 283
 284         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 285
 286         atomic_inc(&adapter->not_replenishing);
 287
 288         ibmveth_schedule_replenishing(adapter);
 289 }
 290
 291 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 292 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 293 {
 294         int i;
 295
 296         if(pool->free_map) {
 297                 kfree(pool->free_map);
 298                 pool->free_map  = NULL;
 299         }
 300
 301         if(pool->skbuff && pool->dma_addr) {
 302                 for(i = 0; i < pool->size; ++i) {
 303                         struct sk_buff *skb = pool->skbuff[i];
 304                         if(skb) {
 305                                 dma_unmap_single(&adapter->vdev->dev,
 306                                                  pool->dma_addr[i],
 307                                                  pool->buff_size,
 308                                                  DMA_FROM_DEVICE);
 309                                 dev_kfree_skb_any(skb);
 310                                 pool->skbuff[i] = NULL;
 311                         }
 312                 }
 313         }
 314
 315         if(pool->dma_addr) {
 316                 kfree(pool->dma_addr);
 317                 pool->dma_addr = NULL;
 318         }
 319
 320         if(pool->skbuff) {
 321                 kfree(pool->skbuff);
 322                 pool->skbuff = NULL;
 323         }
 324 }
 325
 326 /* remove a buffer from a pool */
 327 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 328 {
 329         unsigned int pool  = correlator >> 32;
 330         unsigned int index = correlator & 0xffffffffUL;
 331         unsigned int free_index;
 332         struct sk_buff *skb;
 333
 334         ibmveth_assert(pool < IbmVethNumBufferPools);
 335         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 336
 337         skb = adapter->rx_buff_pool[pool].skbuff[index];
 338
 339         ibmveth_assert(skb != NULL);
 340
 341         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 342
 343         dma_unmap_single(&adapter->vdev->dev,
 344                          adapter->rx_buff_pool[pool].dma_addr[index],
 345                          adapter->rx_buff_pool[pool].buff_size,
 346                          DMA_FROM_DEVICE);
 347
 348         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 349         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 350
 351         mb();
 352
 353         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 354 }
 355
 356 /* get the current buffer on the rx queue */
 357 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 358 {
 359         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 360         unsigned int pool = correlator >> 32;
 361         unsigned int index = correlator & 0xffffffffUL;
 362
 363         ibmveth_assert(pool < IbmVethNumBufferPools);
 364         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 365
 366         return adapter->rx_buff_pool[pool].skbuff[index];
 367 }
 368
 369 /* recycle the current buffer on the rx queue */
 370 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 371 {
 372         u32 q_index = adapter->rx_queue.index;
 373         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 374         unsigned int pool = correlator >> 32;
 375         unsigned int index = correlator & 0xffffffffUL;
 376         union ibmveth_buf_desc desc;
 377         unsigned long lpar_rc;
 378
 379         ibmveth_assert(pool < IbmVethNumBufferPools);
 380         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 381
 382         desc.desc = 0;
 383         desc.fields.valid = 1;
 384         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 385         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 386
 387         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 388
 389         if(lpar_rc != H_Success) {
 390                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 391                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 392         }
 393
 394         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 395                 adapter->rx_queue.index = 0;
 396                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 397         }
 398 }
 399
 400 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 401 {
 402         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 403
 404         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 405                 adapter->rx_queue.index = 0;
 406                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 407         }
 408 }
 409
 410 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 411 {
 412         if(adapter->buffer_list_addr != NULL) {
 413                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 414                         dma_unmap_single(&adapter->vdev->dev,
 415                                         adapter->buffer_list_dma, 4096,
 416                                         DMA_BIDIRECTIONAL);
 417                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 418                 }
 419                 free_page((unsigned long)adapter->buffer_list_addr);
 420                 adapter->buffer_list_addr = NULL;
 421         }
 422
 423         if(adapter->filter_list_addr != NULL) {
 424                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 425                         dma_unmap_single(&adapter->vdev->dev,
 426                                         adapter->filter_list_dma, 4096,
 427                                         DMA_BIDIRECTIONAL);
 428                         adapter->filter_list_dma = DMA_ERROR_CODE;
 429                 }
 430                 free_page((unsigned long)adapter->filter_list_addr);
 431                 adapter->filter_list_addr = NULL;
 432         }
 433
 434         if(adapter->rx_queue.queue_addr != NULL) {
 435                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 436                         dma_unmap_single(&adapter->vdev->dev,
 437                                         adapter->rx_queue.queue_dma,
 438                                         adapter->rx_queue.queue_len,
 439                                         DMA_BIDIRECTIONAL);
 440                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 441                 }
 442                 kfree(adapter->rx_queue.queue_addr);
 443                 adapter->rx_queue.queue_addr = NULL;
 444         }
 445
 446         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
 447         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
 448         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
 449 }
 450
 451 static int ibmveth_open(struct net_device *netdev)
 452 {
 453         struct ibmveth_adapter *adapter = netdev->priv;
 454         u64 mac_address = 0;
 455         int rxq_entries;
 456         unsigned long lpar_rc;
 457         int rc;
 458         union ibmveth_buf_desc rxq_desc;
 459
 460         ibmveth_debug_printk("open starting\n");
 461
 462         rxq_entries =
 463                 adapter->rx_buff_pool[0].size +
 464                 adapter->rx_buff_pool[1].size +
 465                 adapter->rx_buff_pool[2].size + 1;
 466
 467         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 468         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 469
 470         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 471                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 472                 ibmveth_cleanup(adapter);
 473                 return -ENOMEM;
 474         }
 475
 476         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 477         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 478
 479         if(!adapter->rx_queue.queue_addr) {
 480                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 481                 ibmveth_cleanup(adapter);
 482                 return -ENOMEM;
 483         }
 484
 485         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 486                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 487         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 488                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 489         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 490                         adapter->rx_queue.queue_addr,
 491                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 492
 493         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 494            (dma_mapping_error(adapter->filter_list_dma)) ||
 495            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 496                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 497                 ibmveth_cleanup(adapter);
 498                 return -ENOMEM;
 499         }
 500
 501         adapter->rx_queue.index = 0;
 502         adapter->rx_queue.num_slots = rxq_entries;
 503         adapter->rx_queue.toggle = 1;
 504
 505         if(ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[0]) ||
 506            ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[1]) ||
 507            ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[2]))
 508         {
 509                 ibmveth_error_printk("unable to allocate buffer pools\n");
 510                 ibmveth_cleanup(adapter);
 511                 return -ENOMEM;
 512         }
 513
 514         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 515         mac_address = mac_address >> 16;
 516
 517         rxq_desc.desc = 0;
 518         rxq_desc.fields.valid = 1;
 519         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 520         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 521
 522         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 523         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 524         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 525
 526
 527         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 528                                          adapter->buffer_list_dma,
 529                                          rxq_desc.desc,
 530                                          adapter->filter_list_dma,
 531                                          mac_address);
 532
 533         if(lpar_rc != H_Success) {
 534                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 535                 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
 536                                      adapter->buffer_list_dma,
 537                                      adapter->filter_list_dma,
 538                                      rxq_desc.desc,
 539                                      mac_address);
 540                 ibmveth_cleanup(adapter);
 541                 return -ENONET;
 542         }
 543
 544         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 545         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 546                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 547                 do {
 548                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 549                 } while (H_isLongBusy(rc) || (rc == H_Busy));
 550
 551                 ibmveth_cleanup(adapter);
 552                 return rc;
 553         }
 554
 555         netif_start_queue(netdev);
 556
 557         ibmveth_debug_printk("scheduling initial replenish cycle\n");
 558         ibmveth_schedule_replenishing(adapter);
 559
 560         ibmveth_debug_printk("open complete\n");
 561
 562         return 0;
 563 }
 564
 565 static int ibmveth_close(struct net_device *netdev)
 566 {
 567         struct ibmveth_adapter *adapter = netdev->priv;
 568         long lpar_rc;
 569
 570         ibmveth_debug_printk("close starting\n");
 571
 572         netif_stop_queue(netdev);
 573
 574         free_irq(netdev->irq, netdev);
 575
 576         cancel_delayed_work(&adapter->replenish_task);
 577         flush_scheduled_work();
 578
 579         do {
 580                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 581         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
 582
 583         if(lpar_rc != H_Success)
 584         {
 585                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 586                                      lpar_rc);
 587         }
 588
 589         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 590
 591         ibmveth_cleanup(adapter);
 592
 593         ibmveth_debug_printk("close complete\n");
 594
 595         return 0;
 596 }
 597
 598 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 599         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 600         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 601         cmd->speed = SPEED_1000;
 602         cmd->duplex = DUPLEX_FULL;
 603         cmd->port = PORT_FIBRE;
 604         cmd->phy_address = 0;
 605         cmd->transceiver = XCVR_INTERNAL;
 606         cmd->autoneg = AUTONEG_ENABLE;
 607         cmd->maxtxpkt = 0;
 608         cmd->maxrxpkt = 1;
 609         return 0;
 610 }
 611
 612 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 613         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 614         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 615 }
 616
 617 static u32 netdev_get_link(struct net_device *dev) {
 618         return 1;
 619 }
 620
 621 static struct ethtool_ops netdev_ethtool_ops = {
 622         .get_drvinfo            = netdev_get_drvinfo,
 623         .get_settings           = netdev_get_settings,
 624         .get_link               = netdev_get_link,
 625         .get_sg                 = ethtool_op_get_sg,
 626         .get_tx_csum            = ethtool_op_get_tx_csum,
 627 };
 628
 629 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 630 {
 631         return -EOPNOTSUPP;
 632 }
 633
 634 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 635
 636 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 637 {
 638         struct ibmveth_adapter *adapter = netdev->priv;
 639         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 640         unsigned long lpar_rc;
 641         int nfrags = 0, curfrag;
 642         unsigned long correlator;
 643         unsigned int retry_count;
 644
 645         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 646                 adapter->stats.tx_dropped++;
 647                 dev_kfree_skb(skb);
 648                 return 0;
 649         }
 650
 651         memset(&desc, 0, sizeof(desc));
 652
 653         /* nfrags = number of frags after the initial fragment */
 654         nfrags = skb_shinfo(skb)->nr_frags;
 655
 656         if(nfrags)
 657                 adapter->tx_multidesc_send++;
 658
 659         /* map the initial fragment */
 660         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 661         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 662                                         desc[0].fields.length, DMA_TO_DEVICE);
 663         desc[0].fields.valid   = 1;
 664
 665         if(dma_mapping_error(desc[0].fields.address)) {
 666                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 667                 adapter->tx_map_failed++;
 668                 adapter->stats.tx_dropped++;
 669                 dev_kfree_skb(skb);
 670                 return 0;
 671         }
 672
 673         curfrag = nfrags;
 674
 675         /* map fragments past the initial portion if there are any */
 676         while(curfrag--) {
 677                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 678                 desc[curfrag+1].fields.address
 679                         = dma_map_single(&adapter->vdev->dev,
 680                                 page_address(frag->page) + frag->page_offset,
 681                                 frag->size, DMA_TO_DEVICE);
 682                 desc[curfrag+1].fields.length = frag->size;
 683                 desc[curfrag+1].fields.valid  = 1;
 684
 685                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 686                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 687                         adapter->tx_map_failed++;
 688                         adapter->stats.tx_dropped++;
 689                         /* Free all the mappings we just created */
 690                         while(curfrag < nfrags) {
 691                                 dma_unmap_single(&adapter->vdev->dev,
 692                                                  desc[curfrag+1].fields.address,
 693                                                  desc[curfrag+1].fields.length,
 694                                                  DMA_TO_DEVICE);
 695                                 curfrag++;
 696                         }
 697                         dev_kfree_skb(skb);
 698                         return 0;
 699                 }
 700         }
 701
 702         /* send the frame. Arbitrarily set retrycount to 1024 */
 703         correlator = 0;
 704         retry_count = 1024;
 705         do {
 706                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 707                                              desc[0].desc,
 708                                              desc[1].desc,
 709                                              desc[2].desc,
 710                                              desc[3].desc,
 711                                              desc[4].desc,
 712                                              desc[5].desc,
 713                                              correlator);
 714         } while ((lpar_rc == H_Busy) && (retry_count--));
 715
 716         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
 717                 int i;
 718                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 719                 for(i = 0; i < 6; i++) {
 720                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 721                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 722                 }
 723                 adapter->tx_send_failed++;
 724                 adapter->stats.tx_dropped++;
 725         } else {
 726                 adapter->stats.tx_packets++;
 727                 adapter->stats.tx_bytes += skb->len;
 728         }
 729
 730         do {
 731                 dma_unmap_single(&adapter->vdev->dev,
 732                                 desc[nfrags].fields.address,
 733                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 734         } while(--nfrags >= 0);
 735
 736         dev_kfree_skb(skb);
 737         return 0;
 738 }
 739
 740 static int ibmveth_poll(struct net_device *netdev, int *budget)
 741 {
 742         struct ibmveth_adapter *adapter = netdev->priv;
 743         int max_frames_to_process = netdev->quota;
 744         int frames_processed = 0;
 745         int more_work = 1;
 746         unsigned long lpar_rc;
 747
 748  restart_poll:
 749         do {
 750                 struct net_device *netdev = adapter->netdev;
 751
 752                 if(ibmveth_rxq_pending_buffer(adapter)) {
 753                         struct sk_buff *skb;
 754
 755                         rmb();
 756
 757                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 758                                 wmb(); /* suggested by larson1 */
 759                                 adapter->rx_invalid_buffer++;
 760                                 ibmveth_debug_printk("recycling invalid buffer\n");
 761                                 ibmveth_rxq_recycle_buffer(adapter);
 762                         } else {
 763                                 int length = ibmveth_rxq_frame_length(adapter);
 764                                 int offset = ibmveth_rxq_frame_offset(adapter);
 765                                 skb = ibmveth_rxq_get_buffer(adapter);
 766
 767                                 ibmveth_rxq_harvest_buffer(adapter);
 768
 769                                 skb_reserve(skb, offset);
 770                                 skb_put(skb, length);
 771                                 skb->dev = netdev;
 772                                 skb->protocol = eth_type_trans(skb, netdev);
 773
 774                                 netif_receive_skb(skb); /* send it up */
 775
 776                                 adapter->stats.rx_packets++;
 777                                 adapter->stats.rx_bytes += length;
 778                                 frames_processed++;
 779                         }
 780                 } else {
 781                         more_work = 0;
 782                 }
 783         } while(more_work && (frames_processed < max_frames_to_process));
 784
 785         ibmveth_schedule_replenishing(adapter);
 786
 787         if(more_work) {
 788                 /* more work to do - return that we are not done yet */
 789                 netdev->quota -= frames_processed;
 790                 *budget -= frames_processed;
 791                 return 1;
 792         }
 793
 794         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 795         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 796
 797         ibmveth_assert(lpar_rc == H_Success);
 798
 799         netif_rx_complete(netdev);
 800
 801         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 802         {
 803                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 804                 ibmveth_assert(lpar_rc == H_Success);
 805                 more_work = 1;
 806                 goto restart_poll;
 807         }
 808
 809         netdev->quota -= frames_processed;
 810         *budget -= frames_processed;
 811
 812         /* we really are done */
 813         return 0;
 814 }
 815
 816 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 817 {
 818         struct net_device *netdev = dev_instance;
 819         struct ibmveth_adapter *adapter = netdev->priv;
 820         unsigned long lpar_rc;
 821
 822         if(netif_rx_schedule_prep(netdev)) {
 823                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 824                 ibmveth_assert(lpar_rc == H_Success);
 825                 __netif_rx_schedule(netdev);
 826         }
 827         return IRQ_HANDLED;
 828 }
 829
 830 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 831 {
 832         struct ibmveth_adapter *adapter = dev->priv;
 833         return &adapter->stats;
 834 }
 835
 836 static void ibmveth_set_multicast_list(struct net_device *netdev)
 837 {
 838         struct ibmveth_adapter *adapter = netdev->priv;
 839         unsigned long lpar_rc;
 840
 841         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 842                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 843                                            IbmVethMcastEnableRecv |
 844                                            IbmVethMcastDisableFiltering,
 845                                            0);
 846                 if(lpar_rc != H_Success) {
 847                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 848                 }
 849         } else {
 850                 struct dev_mc_list *mclist = netdev->mc_list;
 851                 int i;
 852                 /* clear the filter table & disable filtering */
 853                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 854                                            IbmVethMcastEnableRecv |
 855                                            IbmVethMcastDisableFiltering |
 856                                            IbmVethMcastClearFilterTable,
 857                                            0);
 858                 if(lpar_rc != H_Success) {
 859                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 860                 }
 861                 /* add the addresses to the filter table */
 862                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 863                         // add the multicast address to the filter table
 864                         unsigned long mcast_addr = 0;
 865                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 866                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 867                                                    IbmVethMcastAddFilter,
 868                                                    mcast_addr);
 869                         if(lpar_rc != H_Success) {
 870                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 871                         }
 872                 }
 873
 874                 /* re-enable filtering */
 875                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 876                                            IbmVethMcastEnableFiltering,
 877                                            0);
 878                 if(lpar_rc != H_Success) {
 879                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 880                 }
 881         }
 882 }
 883
 884 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 885 {
 886         if ((new_mtu < 68) || (new_mtu > (1<<20)))
 887                 return -EINVAL;
 888         dev->mtu = new_mtu;
 889         return 0;
 890 }
 891
 892 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 893 {
 894         int rc;
 895         struct net_device *netdev;
 896         struct ibmveth_adapter *adapter;
 897
 898         unsigned char *mac_addr_p;
 899         unsigned int *mcastFilterSize_p;
 900
 901
 902         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 903                                         dev->unit_address);
 904
 905         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 906         if(!mac_addr_p) {
 907                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 908                                 "attribute\n", __FILE__, __LINE__);
 909                 return 0;
 910         }
 911
 912         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 913         if(!mcastFilterSize_p) {
 914                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 915                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 916                                 __FILE__, __LINE__);
 917                 return 0;
 918         }
 919
 920         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 921
 922         if(!netdev)
 923                 return -ENOMEM;
 924
 925         SET_MODULE_OWNER(netdev);
 926
 927         adapter = netdev->priv;
 928         memset(adapter, 0, sizeof(adapter));
 929         dev->dev.driver_data = netdev;
 930
 931         adapter->vdev = dev;
 932         adapter->netdev = netdev;
 933         adapter->mcastFilterSize= *mcastFilterSize_p;
 934
 935         /*      Some older boxes running PHYP non-natively have an OF that
 936                 returns a 8-byte local-mac-address field (and the first
 937                 2 bytes have to be ignored) while newer boxes' OF return
 938                 a 6-byte field. Note that IEEE 1275 specifies that
 939                 local-mac-address must be a 6-byte field.
 940                 The RPA doc specifies that the first byte must be 10b, so
 941                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 942
 943         if ((*mac_addr_p & 0x3) != 0x02)
 944                 mac_addr_p += 2;
 945
 946         adapter->mac_addr = 0;
 947         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 948
 949         adapter->liobn = dev->iommu_table->it_index;
 950
 951         netdev->irq = dev->irq;
 952         netdev->open               = ibmveth_open;
 953         netdev->poll               = ibmveth_poll;
 954         netdev->weight             = 16;
 955         netdev->stop               = ibmveth_close;
 956         netdev->hard_start_xmit    = ibmveth_start_xmit;
 957         netdev->get_stats          = ibmveth_get_stats;
 958         netdev->set_multicast_list = ibmveth_set_multicast_list;
 959         netdev->do_ioctl           = ibmveth_ioctl;
 960         netdev->ethtool_ops           = &netdev_ethtool_ops;
 961         netdev->change_mtu         = ibmveth_change_mtu;
 962         SET_NETDEV_DEV(netdev, &dev->dev);
 963
 964         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 965
 966         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[0], 0, IbmVethPool0DftCnt, IbmVethPool0DftSize);
 967         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[1], 1, IbmVethPool1DftCnt, IbmVethPool1DftSize);
 968         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[2], 2, IbmVethPool2DftCnt, IbmVethPool2DftSize);
 969
 970         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
 971
 972         INIT_WORK(&adapter->replenish_task, (void*)ibmveth_replenish_task, (void*)adapter);
 973
 974         adapter->buffer_list_dma = DMA_ERROR_CODE;
 975         adapter->filter_list_dma = DMA_ERROR_CODE;
 976         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 977
 978         atomic_set(&adapter->not_replenishing, 1);
 979
 980         ibmveth_debug_printk("registering netdev...\n");
 981
 982         rc = register_netdev(netdev);
 983
 984         if(rc) {
 985                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
 986                 free_netdev(netdev);
 987                 return rc;
 988         }
 989
 990         ibmveth_debug_printk("registered\n");
 991
 992         ibmveth_proc_register_adapter(adapter);
 993
 994         return 0;
 995 }
 996
 997 static int __devexit ibmveth_remove(struct vio_dev *dev)
 998 {
 999         struct net_device *netdev = dev->dev.driver_data;
1000         struct ibmveth_adapter *adapter = netdev->priv;
1001
1002         unregister_netdev(netdev);
1003
1004         ibmveth_proc_unregister_adapter(adapter);
1005
1006         free_netdev(netdev);
1007         return 0;
1008 }
1009
1010 #ifdef CONFIG_PROC_FS
1011 static void ibmveth_proc_register_driver(void)
1012 {
1013         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1014         if (ibmveth_proc_dir) {
1015                 SET_MODULE_OWNER(ibmveth_proc_dir);
1016         }
1017 }
1018
1019 static void ibmveth_proc_unregister_driver(void)
1020 {
1021         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1022 }
1023
1024 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1025 {
1026         if (*pos == 0) {
1027                 return (void *)1;
1028         } else {
1029                 return NULL;
1030         }
1031 }
1032
1033 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1034 {
1035         ++*pos;
1036         return NULL;
1037 }
1038
1039 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1040 {
1041 }
1042
1043 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1044 {
1045         struct ibmveth_adapter *adapter = seq->private;
1046         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1047         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1048
1049         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1050
1051         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1052         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1053         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1054                    current_mac[0], current_mac[1], current_mac[2],
1055                    current_mac[3], current_mac[4], current_mac[5]);
1056         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1057                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1058                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1059
1060         seq_printf(seq, "\nAdapter Statistics:\n");
1061         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1062         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1063         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1064         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1065         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1066         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1067         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1068         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1069         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1070         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1071
1072         return 0;
1073 }
1074 static struct seq_operations ibmveth_seq_ops = {
1075         .start = ibmveth_seq_start,
1076         .next  = ibmveth_seq_next,
1077         .stop  = ibmveth_seq_stop,
1078         .show  = ibmveth_seq_show,
1079 };
1080
1081 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1082 {
1083         struct seq_file *seq;
1084         struct proc_dir_entry *proc;
1085         int rc;
1086
1087         rc = seq_open(file, &ibmveth_seq_ops);
1088         if (!rc) {
1089                 /* recover the pointer buried in proc_dir_entry data */
1090                 seq = file->private_data;
1091                 proc = PDE(inode);
1092                 seq->private = proc->data;
1093         }
1094         return rc;
1095 }
1096
1097 static struct file_operations ibmveth_proc_fops = {
1098         .owner   = THIS_MODULE,
1099         .open    = ibmveth_proc_open,
1100         .read    = seq_read,
1101         .llseek  = seq_lseek,
1102         .release = seq_release,
1103 };
1104
1105 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1106 {
1107         struct proc_dir_entry *entry;
1108         if (ibmveth_proc_dir) {
1109                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1110                 if (!entry) {
1111                         ibmveth_error_printk("Cannot create adapter proc entry");
1112                 } else {
1113                         entry->data = (void *) adapter;
1114                         entry->proc_fops = &ibmveth_proc_fops;
1115                         SET_MODULE_OWNER(entry);
1116                 }
1117         }
1118         return;
1119 }
1120
1121 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1122 {
1123         if (ibmveth_proc_dir) {
1124                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1125         }
1126 }
1127
1128 #else /* CONFIG_PROC_FS */
1129 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1130 {
1131 }
1132
1133 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1134 {
1135 }
1136 static void ibmveth_proc_register_driver(void)
1137 {
1138 }
1139
1140 static void ibmveth_proc_unregister_driver(void)
1141 {
1142 }
1143 #endif /* CONFIG_PROC_FS */
1144
1145 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1146         { "network", "IBM,l-lan"},
1147         { "", "" }
1148 };
1149
1150 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1151
1152 static struct vio_driver ibmveth_driver = {
1153         .id_table       = ibmveth_device_table,
1154         .probe          = ibmveth_probe,
1155         .remove         = ibmveth_remove,
1156         .driver         = {
1157                 .name   = ibmveth_driver_name,
1158         }
1159 };
1160
1161 static int __init ibmveth_module_init(void)
1162 {
1163         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1164
1165         ibmveth_proc_register_driver();
1166
1167         return vio_register_driver(&ibmveth_driver);
1168 }
1169
1170 static void __exit ibmveth_module_exit(void)
1171 {
1172         vio_unregister_driver(&ibmveth_driver);
1173         ibmveth_proc_unregister_driver();
1174 }
1175
1176 module_init(ibmveth_module_init);
1177 module_exit(ibmveth_module_exit);