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   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_rxq_harvest_buffer(struct ibmveth_adapter *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         pool->active = 0;
 185
 186         return 0;
 187 }
 188
 189 /* replenish the buffers for a pool.  note that we don't need to
 190  * skb_reserve these since they are used for incoming...
 191  */
 192 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 193 {
 194         u32 i;
 195         u32 count = pool->size - atomic_read(&pool->available);
 196         u32 buffers_added = 0;
 197
 198         mb();
 199
 200         for(i = 0; i < count; ++i) {
 201                 struct sk_buff *skb;
 202                 unsigned int free_index, index;
 203                 u64 correlator;
 204                 union ibmveth_buf_desc desc;
 205                 unsigned long lpar_rc;
 206                 dma_addr_t dma_addr;
 207
 208                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 209
 210                 if(!skb) {
 211                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 212                         adapter->replenish_no_mem++;
 213                         break;
 214                 }
 215
 216                 free_index = pool->consumer_index++ % pool->size;
 217                 index = pool->free_map[free_index];
 218
 219                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
 220                 ibmveth_assert(pool->skbuff[index] == NULL);
 221
 222                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
 223                                 pool->buff_size, DMA_FROM_DEVICE);
 224
 225                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 226                 pool->dma_addr[index] = dma_addr;
 227                 pool->skbuff[index] = skb;
 228
 229                 correlator = ((u64)pool->index << 32) | index;
 230                 *(u64*)skb->data = correlator;
 231
 232                 desc.desc = 0;
 233                 desc.fields.valid = 1;
 234                 desc.fields.length = pool->buff_size;
 235                 desc.fields.address = dma_addr;
 236
 237                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 238
 239                 if(lpar_rc != H_Success) {
 240                         pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 241                         pool->skbuff[index] = NULL;
 242                         pool->consumer_index--;
 243                         dma_unmap_single(&adapter->vdev->dev,
 244                                         pool->dma_addr[index], pool->buff_size,
 245                                         DMA_FROM_DEVICE);
 246                         dev_kfree_skb_any(skb);
 247                         adapter->replenish_add_buff_failure++;
 248                         break;
 249                 } else {
 250                         buffers_added++;
 251                         adapter->replenish_add_buff_success++;
 252                 }
 253         }
 254
 255         mb();
 256         atomic_add(buffers_added, &(pool->available));
 257 }
 258
 259 /* replenish routine */
 260 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 261 {
 262         int i;
 263
 264         adapter->replenish_task_cycles++;
 265
 266         for(i = 0; i < IbmVethNumBufferPools; i++)
 267                 if(adapter->rx_buff_pool[i].active)
 268                         ibmveth_replenish_buffer_pool(adapter,
 269                                                      &adapter->rx_buff_pool[i]);
 270
 271         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 272 }
 273
 274 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 275 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 276 {
 277         int i;
 278
 279         if(pool->free_map) {
 280                 kfree(pool->free_map);
 281                 pool->free_map  = NULL;
 282         }
 283
 284         if(pool->skbuff && pool->dma_addr) {
 285                 for(i = 0; i < pool->size; ++i) {
 286                         struct sk_buff *skb = pool->skbuff[i];
 287                         if(skb) {
 288                                 dma_unmap_single(&adapter->vdev->dev,
 289                                                  pool->dma_addr[i],
 290                                                  pool->buff_size,
 291                                                  DMA_FROM_DEVICE);
 292                                 dev_kfree_skb_any(skb);
 293                                 pool->skbuff[i] = NULL;
 294                         }
 295                 }
 296         }
 297
 298         if(pool->dma_addr) {
 299                 kfree(pool->dma_addr);
 300                 pool->dma_addr = NULL;
 301         }
 302
 303         if(pool->skbuff) {
 304                 kfree(pool->skbuff);
 305                 pool->skbuff = NULL;
 306         }
 307         pool->active = 0;
 308 }
 309
 310 /* remove a buffer from a pool */
 311 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 312 {
 313         unsigned int pool  = correlator >> 32;
 314         unsigned int index = correlator & 0xffffffffUL;
 315         unsigned int free_index;
 316         struct sk_buff *skb;
 317
 318         ibmveth_assert(pool < IbmVethNumBufferPools);
 319         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 320
 321         skb = adapter->rx_buff_pool[pool].skbuff[index];
 322
 323         ibmveth_assert(skb != NULL);
 324
 325         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 326
 327         dma_unmap_single(&adapter->vdev->dev,
 328                          adapter->rx_buff_pool[pool].dma_addr[index],
 329                          adapter->rx_buff_pool[pool].buff_size,
 330                          DMA_FROM_DEVICE);
 331
 332         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 333         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 334
 335         mb();
 336
 337         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 338 }
 339
 340 /* get the current buffer on the rx queue */
 341 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 342 {
 343         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 344         unsigned int pool = correlator >> 32;
 345         unsigned int index = correlator & 0xffffffffUL;
 346
 347         ibmveth_assert(pool < IbmVethNumBufferPools);
 348         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 349
 350         return adapter->rx_buff_pool[pool].skbuff[index];
 351 }
 352
 353 /* recycle the current buffer on the rx queue */
 354 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 355 {
 356         u32 q_index = adapter->rx_queue.index;
 357         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 358         unsigned int pool = correlator >> 32;
 359         unsigned int index = correlator & 0xffffffffUL;
 360         union ibmveth_buf_desc desc;
 361         unsigned long lpar_rc;
 362
 363         ibmveth_assert(pool < IbmVethNumBufferPools);
 364         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 365
 366         if(!adapter->rx_buff_pool[pool].active) {
 367                 ibmveth_rxq_harvest_buffer(adapter);
 368                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 369                 return;
 370         }
 371
 372         desc.desc = 0;
 373         desc.fields.valid = 1;
 374         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 375         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 376
 377         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 378
 379         if(lpar_rc != H_Success) {
 380                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 381                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 382         }
 383
 384         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 385                 adapter->rx_queue.index = 0;
 386                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 387         }
 388 }
 389
 390 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 391 {
 392         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 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 void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 401 {
 402         int i;
 403
 404         if(adapter->buffer_list_addr != NULL) {
 405                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 406                         dma_unmap_single(&adapter->vdev->dev,
 407                                         adapter->buffer_list_dma, 4096,
 408                                         DMA_BIDIRECTIONAL);
 409                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 410                 }
 411                 free_page((unsigned long)adapter->buffer_list_addr);
 412                 adapter->buffer_list_addr = NULL;
 413         }
 414
 415         if(adapter->filter_list_addr != NULL) {
 416                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 417                         dma_unmap_single(&adapter->vdev->dev,
 418                                         adapter->filter_list_dma, 4096,
 419                                         DMA_BIDIRECTIONAL);
 420                         adapter->filter_list_dma = DMA_ERROR_CODE;
 421                 }
 422                 free_page((unsigned long)adapter->filter_list_addr);
 423                 adapter->filter_list_addr = NULL;
 424         }
 425
 426         if(adapter->rx_queue.queue_addr != NULL) {
 427                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 428                         dma_unmap_single(&adapter->vdev->dev,
 429                                         adapter->rx_queue.queue_dma,
 430                                         adapter->rx_queue.queue_len,
 431                                         DMA_BIDIRECTIONAL);
 432                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 433                 }
 434                 kfree(adapter->rx_queue.queue_addr);
 435                 adapter->rx_queue.queue_addr = NULL;
 436         }
 437
 438         for(i = 0; i<IbmVethNumBufferPools; i++)
 439                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[i]);
 440 }
 441
 442 static int ibmveth_open(struct net_device *netdev)
 443 {
 444         struct ibmveth_adapter *adapter = netdev->priv;
 445         u64 mac_address = 0;
 446         int rxq_entries = 1;
 447         unsigned long lpar_rc;
 448         int rc;
 449         union ibmveth_buf_desc rxq_desc;
 450         int i;
 451
 452         ibmveth_debug_printk("open starting\n");
 453
 454         for(i = 0; i<IbmVethNumBufferPools; i++)
 455                 rxq_entries += adapter->rx_buff_pool[i].size;
 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 = dma_map_single(&adapter->vdev->dev,
 476                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 477         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 478                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 479         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 480                         adapter->rx_queue.queue_addr,
 481                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 482
 483         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 484            (dma_mapping_error(adapter->filter_list_dma)) ||
 485            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 486                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 487                 ibmveth_cleanup(adapter);
 488                 return -ENOMEM;
 489         }
 490
 491         adapter->rx_queue.index = 0;
 492         adapter->rx_queue.num_slots = rxq_entries;
 493         adapter->rx_queue.toggle = 1;
 494
 495         /* call change_mtu to init the buffer pools based in initial mtu */
 496         ibmveth_change_mtu(netdev, netdev->mtu);
 497
 498         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 499         mac_address = mac_address >> 16;
 500
 501         rxq_desc.desc = 0;
 502         rxq_desc.fields.valid = 1;
 503         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 504         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 505
 506         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 507         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 508         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 509
 510
 511         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 512                                          adapter->buffer_list_dma,
 513                                          rxq_desc.desc,
 514                                          adapter->filter_list_dma,
 515                                          mac_address);
 516
 517         if(lpar_rc != H_Success) {
 518                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 519                 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
 520                                      adapter->buffer_list_dma,
 521                                      adapter->filter_list_dma,
 522                                      rxq_desc.desc,
 523                                      mac_address);
 524                 ibmveth_cleanup(adapter);
 525                 return -ENONET;
 526         }
 527
 528         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 529         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 530                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 531                 do {
 532                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 533                 } while (H_isLongBusy(rc) || (rc == H_Busy));
 534
 535                 ibmveth_cleanup(adapter);
 536                 return rc;
 537         }
 538
 539         ibmveth_debug_printk("initial replenish cycle\n");
 540         ibmveth_replenish_task(adapter);
 541
 542         netif_start_queue(netdev);
 543
 544         ibmveth_debug_printk("open complete\n");
 545
 546         return 0;
 547 }
 548
 549 static int ibmveth_close(struct net_device *netdev)
 550 {
 551         struct ibmveth_adapter *adapter = netdev->priv;
 552         long lpar_rc;
 553
 554         ibmveth_debug_printk("close starting\n");
 555
 556         netif_stop_queue(netdev);
 557
 558         free_irq(netdev->irq, netdev);
 559
 560         do {
 561                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 562         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
 563
 564         if(lpar_rc != H_Success)
 565         {
 566                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 567                                      lpar_rc);
 568         }
 569
 570         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 571
 572         ibmveth_cleanup(adapter);
 573
 574         ibmveth_debug_printk("close complete\n");
 575
 576         return 0;
 577 }
 578
 579 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 580         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 581         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 582         cmd->speed = SPEED_1000;
 583         cmd->duplex = DUPLEX_FULL;
 584         cmd->port = PORT_FIBRE;
 585         cmd->phy_address = 0;
 586         cmd->transceiver = XCVR_INTERNAL;
 587         cmd->autoneg = AUTONEG_ENABLE;
 588         cmd->maxtxpkt = 0;
 589         cmd->maxrxpkt = 1;
 590         return 0;
 591 }
 592
 593 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 594         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 595         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 596 }
 597
 598 static u32 netdev_get_link(struct net_device *dev) {
 599         return 1;
 600 }
 601
 602 static struct ethtool_ops netdev_ethtool_ops = {
 603         .get_drvinfo            = netdev_get_drvinfo,
 604         .get_settings           = netdev_get_settings,
 605         .get_link               = netdev_get_link,
 606         .get_sg                 = ethtool_op_get_sg,
 607         .get_tx_csum            = ethtool_op_get_tx_csum,
 608 };
 609
 610 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 611 {
 612         return -EOPNOTSUPP;
 613 }
 614
 615 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 616
 617 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 618 {
 619         struct ibmveth_adapter *adapter = netdev->priv;
 620         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 621         unsigned long lpar_rc;
 622         int nfrags = 0, curfrag;
 623         unsigned long correlator;
 624         unsigned int retry_count;
 625
 626         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 627                 adapter->stats.tx_dropped++;
 628                 dev_kfree_skb(skb);
 629                 return 0;
 630         }
 631
 632         memset(&desc, 0, sizeof(desc));
 633
 634         /* nfrags = number of frags after the initial fragment */
 635         nfrags = skb_shinfo(skb)->nr_frags;
 636
 637         if(nfrags)
 638                 adapter->tx_multidesc_send++;
 639
 640         /* map the initial fragment */
 641         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 642         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 643                                         desc[0].fields.length, DMA_TO_DEVICE);
 644         desc[0].fields.valid   = 1;
 645
 646         if(dma_mapping_error(desc[0].fields.address)) {
 647                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 648                 adapter->tx_map_failed++;
 649                 adapter->stats.tx_dropped++;
 650                 dev_kfree_skb(skb);
 651                 return 0;
 652         }
 653
 654         curfrag = nfrags;
 655
 656         /* map fragments past the initial portion if there are any */
 657         while(curfrag--) {
 658                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 659                 desc[curfrag+1].fields.address
 660                         = dma_map_single(&adapter->vdev->dev,
 661                                 page_address(frag->page) + frag->page_offset,
 662                                 frag->size, DMA_TO_DEVICE);
 663                 desc[curfrag+1].fields.length = frag->size;
 664                 desc[curfrag+1].fields.valid  = 1;
 665
 666                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 667                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 668                         adapter->tx_map_failed++;
 669                         adapter->stats.tx_dropped++;
 670                         /* Free all the mappings we just created */
 671                         while(curfrag < nfrags) {
 672                                 dma_unmap_single(&adapter->vdev->dev,
 673                                                  desc[curfrag+1].fields.address,
 674                                                  desc[curfrag+1].fields.length,
 675                                                  DMA_TO_DEVICE);
 676                                 curfrag++;
 677                         }
 678                         dev_kfree_skb(skb);
 679                         return 0;
 680                 }
 681         }
 682
 683         /* send the frame. Arbitrarily set retrycount to 1024 */
 684         correlator = 0;
 685         retry_count = 1024;
 686         do {
 687                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 688                                              desc[0].desc,
 689                                              desc[1].desc,
 690                                              desc[2].desc,
 691                                              desc[3].desc,
 692                                              desc[4].desc,
 693                                              desc[5].desc,
 694                                              correlator);
 695         } while ((lpar_rc == H_Busy) && (retry_count--));
 696
 697         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
 698                 int i;
 699                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 700                 for(i = 0; i < 6; i++) {
 701                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 702                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 703                 }
 704                 adapter->tx_send_failed++;
 705                 adapter->stats.tx_dropped++;
 706         } else {
 707                 adapter->stats.tx_packets++;
 708                 adapter->stats.tx_bytes += skb->len;
 709                 netdev->trans_start = jiffies;
 710         }
 711
 712         do {
 713                 dma_unmap_single(&adapter->vdev->dev,
 714                                 desc[nfrags].fields.address,
 715                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 716         } while(--nfrags >= 0);
 717
 718         dev_kfree_skb(skb);
 719         return 0;
 720 }
 721
 722 static int ibmveth_poll(struct net_device *netdev, int *budget)
 723 {
 724         struct ibmveth_adapter *adapter = netdev->priv;
 725         int max_frames_to_process = netdev->quota;
 726         int frames_processed = 0;
 727         int more_work = 1;
 728         unsigned long lpar_rc;
 729
 730  restart_poll:
 731         do {
 732                 struct net_device *netdev = adapter->netdev;
 733
 734                 if(ibmveth_rxq_pending_buffer(adapter)) {
 735                         struct sk_buff *skb;
 736
 737                         rmb();
 738
 739                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 740                                 wmb(); /* suggested by larson1 */
 741                                 adapter->rx_invalid_buffer++;
 742                                 ibmveth_debug_printk("recycling invalid buffer\n");
 743                                 ibmveth_rxq_recycle_buffer(adapter);
 744                         } else {
 745                                 int length = ibmveth_rxq_frame_length(adapter);
 746                                 int offset = ibmveth_rxq_frame_offset(adapter);
 747                                 skb = ibmveth_rxq_get_buffer(adapter);
 748
 749                                 ibmveth_rxq_harvest_buffer(adapter);
 750
 751                                 skb_reserve(skb, offset);
 752                                 skb_put(skb, length);
 753                                 skb->dev = netdev;
 754                                 skb->protocol = eth_type_trans(skb, netdev);
 755
 756                                 netif_receive_skb(skb); /* send it up */
 757
 758                                 adapter->stats.rx_packets++;
 759                                 adapter->stats.rx_bytes += length;
 760                                 frames_processed++;
 761                                 netdev->last_rx = jiffies;
 762                         }
 763                 } else {
 764                         more_work = 0;
 765                 }
 766         } while(more_work && (frames_processed < max_frames_to_process));
 767
 768         ibmveth_replenish_task(adapter);
 769
 770         if(more_work) {
 771                 /* more work to do - return that we are not done yet */
 772                 netdev->quota -= frames_processed;
 773                 *budget -= frames_processed;
 774                 return 1;
 775         }
 776
 777         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 778         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 779
 780         ibmveth_assert(lpar_rc == H_Success);
 781
 782         netif_rx_complete(netdev);
 783
 784         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 785         {
 786                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 787                 ibmveth_assert(lpar_rc == H_Success);
 788                 more_work = 1;
 789                 goto restart_poll;
 790         }
 791
 792         netdev->quota -= frames_processed;
 793         *budget -= frames_processed;
 794
 795         /* we really are done */
 796         return 0;
 797 }
 798
 799 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 800 {
 801         struct net_device *netdev = dev_instance;
 802         struct ibmveth_adapter *adapter = netdev->priv;
 803         unsigned long lpar_rc;
 804
 805         if(netif_rx_schedule_prep(netdev)) {
 806                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 807                 ibmveth_assert(lpar_rc == H_Success);
 808                 __netif_rx_schedule(netdev);
 809         }
 810         return IRQ_HANDLED;
 811 }
 812
 813 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 814 {
 815         struct ibmveth_adapter *adapter = dev->priv;
 816         return &adapter->stats;
 817 }
 818
 819 static void ibmveth_set_multicast_list(struct net_device *netdev)
 820 {
 821         struct ibmveth_adapter *adapter = netdev->priv;
 822         unsigned long lpar_rc;
 823
 824         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 825                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 826                                            IbmVethMcastEnableRecv |
 827                                            IbmVethMcastDisableFiltering,
 828                                            0);
 829                 if(lpar_rc != H_Success) {
 830                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 831                 }
 832         } else {
 833                 struct dev_mc_list *mclist = netdev->mc_list;
 834                 int i;
 835                 /* clear the filter table & disable filtering */
 836                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 837                                            IbmVethMcastEnableRecv |
 838                                            IbmVethMcastDisableFiltering |
 839                                            IbmVethMcastClearFilterTable,
 840                                            0);
 841                 if(lpar_rc != H_Success) {
 842                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 843                 }
 844                 /* add the addresses to the filter table */
 845                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 846                         // add the multicast address to the filter table
 847                         unsigned long mcast_addr = 0;
 848                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 849                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 850                                                    IbmVethMcastAddFilter,
 851                                                    mcast_addr);
 852                         if(lpar_rc != H_Success) {
 853                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 854                         }
 855                 }
 856
 857                 /* re-enable filtering */
 858                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 859                                            IbmVethMcastEnableFiltering,
 860                                            0);
 861                 if(lpar_rc != H_Success) {
 862                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 863                 }
 864         }
 865 }
 866
 867 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 868 {
 869         struct ibmveth_adapter *adapter = dev->priv;
 870         int i;
 871         int prev_smaller = 1;
 872
 873         if ((new_mtu < 68) ||
 874             (new_mtu > (pool_size[IbmVethNumBufferPools-1]) - IBMVETH_BUFF_OH))
 875                 return -EINVAL;
 876
 877         for(i = 0; i<IbmVethNumBufferPools; i++) {
 878                 int activate = 0;
 879                 if (new_mtu > (pool_size[i]  - IBMVETH_BUFF_OH)) {
 880                         activate = 1;
 881                         prev_smaller= 1;
 882                 } else {
 883                         if (prev_smaller)
 884                                 activate = 1;
 885                         prev_smaller= 0;
 886                 }
 887
 888                 if (activate && !adapter->rx_buff_pool[i].active) {
 889                         struct ibmveth_buff_pool *pool =
 890                                                 &adapter->rx_buff_pool[i];
 891                         if(ibmveth_alloc_buffer_pool(pool)) {
 892                                 ibmveth_error_printk("unable to alloc pool\n");
 893                                 return -ENOMEM;
 894                         }
 895                         adapter->rx_buff_pool[i].active = 1;
 896                 } else if (!activate && adapter->rx_buff_pool[i].active) {
 897                         adapter->rx_buff_pool[i].active = 0;
 898                         h_free_logical_lan_buffer(adapter->vdev->unit_address,
 899                                           (u64)pool_size[i]);
 900                 }
 901
 902         }
 903
 904         /* kick the interrupt handler so that the new buffer pools get
 905            replenished or deallocated */
 906         ibmveth_interrupt(dev->irq, dev, NULL);
 907
 908         dev->mtu = new_mtu;
 909         return 0;
 910 }
 911
 912 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 913 {
 914         int rc, i;
 915         struct net_device *netdev;
 916         struct ibmveth_adapter *adapter = NULL;
 917
 918         unsigned char *mac_addr_p;
 919         unsigned int *mcastFilterSize_p;
 920
 921
 922         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 923                                         dev->unit_address);
 924
 925         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 926         if(!mac_addr_p) {
 927                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 928                                 "attribute\n", __FILE__, __LINE__);
 929                 return 0;
 930         }
 931
 932         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 933         if(!mcastFilterSize_p) {
 934                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 935                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 936                                 __FILE__, __LINE__);
 937                 return 0;
 938         }
 939
 940         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 941
 942         if(!netdev)
 943                 return -ENOMEM;
 944
 945         SET_MODULE_OWNER(netdev);
 946
 947         adapter = netdev->priv;
 948         memset(adapter, 0, sizeof(adapter));
 949         dev->dev.driver_data = netdev;
 950
 951         adapter->vdev = dev;
 952         adapter->netdev = netdev;
 953         adapter->mcastFilterSize= *mcastFilterSize_p;
 954
 955         /*      Some older boxes running PHYP non-natively have an OF that
 956                 returns a 8-byte local-mac-address field (and the first
 957                 2 bytes have to be ignored) while newer boxes' OF return
 958                 a 6-byte field. Note that IEEE 1275 specifies that
 959                 local-mac-address must be a 6-byte field.
 960                 The RPA doc specifies that the first byte must be 10b, so
 961                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 962
 963         if ((*mac_addr_p & 0x3) != 0x02)
 964                 mac_addr_p += 2;
 965
 966         adapter->mac_addr = 0;
 967         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 968
 969         adapter->liobn = dev->iommu_table->it_index;
 970
 971         netdev->irq = dev->irq;
 972         netdev->open               = ibmveth_open;
 973         netdev->poll               = ibmveth_poll;
 974         netdev->weight             = 16;
 975         netdev->stop               = ibmveth_close;
 976         netdev->hard_start_xmit    = ibmveth_start_xmit;
 977         netdev->get_stats          = ibmveth_get_stats;
 978         netdev->set_multicast_list = ibmveth_set_multicast_list;
 979         netdev->do_ioctl           = ibmveth_ioctl;
 980         netdev->ethtool_ops           = &netdev_ethtool_ops;
 981         netdev->change_mtu         = ibmveth_change_mtu;
 982         SET_NETDEV_DEV(netdev, &dev->dev);
 983
 984         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 985
 986         for(i = 0; i<IbmVethNumBufferPools; i++)
 987                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
 988                                          pool_count[i], pool_size[i]);
 989
 990         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
 991
 992         adapter->buffer_list_dma = DMA_ERROR_CODE;
 993         adapter->filter_list_dma = DMA_ERROR_CODE;
 994         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 995
 996         ibmveth_debug_printk("registering netdev...\n");
 997
 998         rc = register_netdev(netdev);
 999
1000         if(rc) {
1001                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1002                 free_netdev(netdev);
1003                 return rc;
1004         }
1005
1006         ibmveth_debug_printk("registered\n");
1007
1008         ibmveth_proc_register_adapter(adapter);
1009
1010         return 0;
1011 }
1012
1013 static int __devexit ibmveth_remove(struct vio_dev *dev)
1014 {
1015         struct net_device *netdev = dev->dev.driver_data;
1016         struct ibmveth_adapter *adapter = netdev->priv;
1017
1018         unregister_netdev(netdev);
1019
1020         ibmveth_proc_unregister_adapter(adapter);
1021
1022         free_netdev(netdev);
1023         return 0;
1024 }
1025
1026 #ifdef CONFIG_PROC_FS
1027 static void ibmveth_proc_register_driver(void)
1028 {
1029         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1030         if (ibmveth_proc_dir) {
1031                 SET_MODULE_OWNER(ibmveth_proc_dir);
1032         }
1033 }
1034
1035 static void ibmveth_proc_unregister_driver(void)
1036 {
1037         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1038 }
1039
1040 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1041 {
1042         if (*pos == 0) {
1043                 return (void *)1;
1044         } else {
1045                 return NULL;
1046         }
1047 }
1048
1049 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1050 {
1051         ++*pos;
1052         return NULL;
1053 }
1054
1055 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1056 {
1057 }
1058
1059 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1060 {
1061         struct ibmveth_adapter *adapter = seq->private;
1062         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1063         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1064
1065         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1066
1067         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1068         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1069         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1070                    current_mac[0], current_mac[1], current_mac[2],
1071                    current_mac[3], current_mac[4], current_mac[5]);
1072         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1073                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1074                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1075
1076         seq_printf(seq, "\nAdapter Statistics:\n");
1077         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1078         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1079         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1080         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1081         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1082         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1083         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1084         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1085         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1086         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1087
1088         return 0;
1089 }
1090 static struct seq_operations ibmveth_seq_ops = {
1091         .start = ibmveth_seq_start,
1092         .next  = ibmveth_seq_next,
1093         .stop  = ibmveth_seq_stop,
1094         .show  = ibmveth_seq_show,
1095 };
1096
1097 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1098 {
1099         struct seq_file *seq;
1100         struct proc_dir_entry *proc;
1101         int rc;
1102
1103         rc = seq_open(file, &ibmveth_seq_ops);
1104         if (!rc) {
1105                 /* recover the pointer buried in proc_dir_entry data */
1106                 seq = file->private_data;
1107                 proc = PDE(inode);
1108                 seq->private = proc->data;
1109         }
1110         return rc;
1111 }
1112
1113 static struct file_operations ibmveth_proc_fops = {
1114         .owner   = THIS_MODULE,
1115         .open    = ibmveth_proc_open,
1116         .read    = seq_read,
1117         .llseek  = seq_lseek,
1118         .release = seq_release,
1119 };
1120
1121 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1122 {
1123         struct proc_dir_entry *entry;
1124         if (ibmveth_proc_dir) {
1125                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1126                 if (!entry) {
1127                         ibmveth_error_printk("Cannot create adapter proc entry");
1128                 } else {
1129                         entry->data = (void *) adapter;
1130                         entry->proc_fops = &ibmveth_proc_fops;
1131                         SET_MODULE_OWNER(entry);
1132                 }
1133         }
1134         return;
1135 }
1136
1137 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1138 {
1139         if (ibmveth_proc_dir) {
1140                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1141         }
1142 }
1143
1144 #else /* CONFIG_PROC_FS */
1145 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1146 {
1147 }
1148
1149 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1150 {
1151 }
1152 static void ibmveth_proc_register_driver(void)
1153 {
1154 }
1155
1156 static void ibmveth_proc_unregister_driver(void)
1157 {
1158 }
1159 #endif /* CONFIG_PROC_FS */
1160
1161 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1162         { "network", "IBM,l-lan"},
1163         { "", "" }
1164 };
1165
1166 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1167
1168 static struct vio_driver ibmveth_driver = {
1169         .name        = (char *)ibmveth_driver_name,
1170         .id_table    = ibmveth_device_table,
1171         .probe       = ibmveth_probe,
1172         .remove      = ibmveth_remove
1173 };
1174
1175 static int __init ibmveth_module_init(void)
1176 {
1177         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1178
1179         ibmveth_proc_register_driver();
1180
1181         return vio_register_driver(&ibmveth_driver);
1182 }
1183
1184 static void __exit ibmveth_module_exit(void)
1185 {
1186         vio_unregister_driver(&ibmveth_driver);
1187         ibmveth_proc_unregister_driver();
1188 }
1189
1190 module_init(ibmveth_module_init);
1191 module_exit(ibmveth_module_exit);