git.oblomov.eu Git - linux-2.6/blob - 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_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] = index;
 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         kfree(pool->free_map);
 280         pool->free_map = NULL;
 281
 282         if(pool->skbuff && pool->dma_addr) {
 283                 for(i = 0; i < pool->size; ++i) {
 284                         struct sk_buff *skb = pool->skbuff[i];
 285                         if(skb) {
 286                                 dma_unmap_single(&adapter->vdev->dev,
 287                                                  pool->dma_addr[i],
 288                                                  pool->buff_size,
 289                                                  DMA_FROM_DEVICE);
 290                                 dev_kfree_skb_any(skb);
 291                                 pool->skbuff[i] = NULL;
 292                         }
 293                 }
 294         }
 295
 296         if(pool->dma_addr) {
 297                 kfree(pool->dma_addr);
 298                 pool->dma_addr = NULL;
 299         }
 300
 301         if(pool->skbuff) {
 302                 kfree(pool->skbuff);
 303                 pool->skbuff = NULL;
 304         }
 305         pool->active = 0;
 306 }
 307
 308 /* remove a buffer from a pool */
 309 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 310 {
 311         unsigned int pool  = correlator >> 32;
 312         unsigned int index = correlator & 0xffffffffUL;
 313         unsigned int free_index;
 314         struct sk_buff *skb;
 315
 316         ibmveth_assert(pool < IbmVethNumBufferPools);
 317         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 318
 319         skb = adapter->rx_buff_pool[pool].skbuff[index];
 320
 321         ibmveth_assert(skb != NULL);
 322
 323         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 324
 325         dma_unmap_single(&adapter->vdev->dev,
 326                          adapter->rx_buff_pool[pool].dma_addr[index],
 327                          adapter->rx_buff_pool[pool].buff_size,
 328                          DMA_FROM_DEVICE);
 329
 330         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 331         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 332
 333         mb();
 334
 335         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 336 }
 337
 338 /* get the current buffer on the rx queue */
 339 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 340 {
 341         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 342         unsigned int pool = correlator >> 32;
 343         unsigned int index = correlator & 0xffffffffUL;
 344
 345         ibmveth_assert(pool < IbmVethNumBufferPools);
 346         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 347
 348         return adapter->rx_buff_pool[pool].skbuff[index];
 349 }
 350
 351 /* recycle the current buffer on the rx queue */
 352 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 353 {
 354         u32 q_index = adapter->rx_queue.index;
 355         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 356         unsigned int pool = correlator >> 32;
 357         unsigned int index = correlator & 0xffffffffUL;
 358         union ibmveth_buf_desc desc;
 359         unsigned long lpar_rc;
 360
 361         ibmveth_assert(pool < IbmVethNumBufferPools);
 362         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 363
 364         if(!adapter->rx_buff_pool[pool].active) {
 365                 ibmveth_rxq_harvest_buffer(adapter);
 366                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 367                 return;
 368         }
 369
 370         desc.desc = 0;
 371         desc.fields.valid = 1;
 372         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 373         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 374
 375         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 376
 377         if(lpar_rc != H_Success) {
 378                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 379                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 380         }
 381
 382         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 383                 adapter->rx_queue.index = 0;
 384                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 385         }
 386 }
 387
 388 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 389 {
 390         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 391
 392         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 393                 adapter->rx_queue.index = 0;
 394                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 395         }
 396 }
 397
 398 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 399 {
 400         int i;
 401
 402         if(adapter->buffer_list_addr != NULL) {
 403                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 404                         dma_unmap_single(&adapter->vdev->dev,
 405                                         adapter->buffer_list_dma, 4096,
 406                                         DMA_BIDIRECTIONAL);
 407                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 408                 }
 409                 free_page((unsigned long)adapter->buffer_list_addr);
 410                 adapter->buffer_list_addr = NULL;
 411         }
 412
 413         if(adapter->filter_list_addr != NULL) {
 414                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 415                         dma_unmap_single(&adapter->vdev->dev,
 416                                         adapter->filter_list_dma, 4096,
 417                                         DMA_BIDIRECTIONAL);
 418                         adapter->filter_list_dma = DMA_ERROR_CODE;
 419                 }
 420                 free_page((unsigned long)adapter->filter_list_addr);
 421                 adapter->filter_list_addr = NULL;
 422         }
 423
 424         if(adapter->rx_queue.queue_addr != NULL) {
 425                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 426                         dma_unmap_single(&adapter->vdev->dev,
 427                                         adapter->rx_queue.queue_dma,
 428                                         adapter->rx_queue.queue_len,
 429                                         DMA_BIDIRECTIONAL);
 430                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 431                 }
 432                 kfree(adapter->rx_queue.queue_addr);
 433                 adapter->rx_queue.queue_addr = NULL;
 434         }
 435
 436         for(i = 0; i<IbmVethNumBufferPools; i++)
 437                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[i]);
 438 }
 439
 440 static int ibmveth_open(struct net_device *netdev)
 441 {
 442         struct ibmveth_adapter *adapter = netdev->priv;
 443         u64 mac_address = 0;
 444         int rxq_entries = 1;
 445         unsigned long lpar_rc;
 446         int rc;
 447         union ibmveth_buf_desc rxq_desc;
 448         int i;
 449
 450         ibmveth_debug_printk("open starting\n");
 451
 452         for(i = 0; i<IbmVethNumBufferPools; i++)
 453                 rxq_entries += adapter->rx_buff_pool[i].size;
 454
 455         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 456         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 457
 458         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 459                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 460                 ibmveth_cleanup(adapter);
 461                 return -ENOMEM;
 462         }
 463
 464         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 465         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 466
 467         if(!adapter->rx_queue.queue_addr) {
 468                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 469                 ibmveth_cleanup(adapter);
 470                 return -ENOMEM;
 471         }
 472
 473         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 474                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 475         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 476                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 477         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 478                         adapter->rx_queue.queue_addr,
 479                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 480
 481         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 482            (dma_mapping_error(adapter->filter_list_dma)) ||
 483            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 484                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 485                 ibmveth_cleanup(adapter);
 486                 return -ENOMEM;
 487         }
 488
 489         adapter->rx_queue.index = 0;
 490         adapter->rx_queue.num_slots = rxq_entries;
 491         adapter->rx_queue.toggle = 1;
 492
 493         /* call change_mtu to init the buffer pools based in initial mtu */
 494         ibmveth_change_mtu(netdev, netdev->mtu);
 495
 496         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 497         mac_address = mac_address >> 16;
 498
 499         rxq_desc.desc = 0;
 500         rxq_desc.fields.valid = 1;
 501         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 502         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 503
 504         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 505         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 506         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 507
 508
 509         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 510                                          adapter->buffer_list_dma,
 511                                          rxq_desc.desc,
 512                                          adapter->filter_list_dma,
 513                                          mac_address);
 514
 515         if(lpar_rc != H_Success) {
 516                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 517                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
 518                                      adapter->buffer_list_dma,
 519                                      adapter->filter_list_dma,
 520                                      rxq_desc.desc,
 521                                      mac_address);
 522                 ibmveth_cleanup(adapter);
 523                 return -ENONET;
 524         }
 525
 526         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 527         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 528                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 529                 do {
 530                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 531                 } while (H_isLongBusy(rc) || (rc == H_Busy));
 532
 533                 ibmveth_cleanup(adapter);
 534                 return rc;
 535         }
 536
 537         ibmveth_debug_printk("initial replenish cycle\n");
 538         ibmveth_interrupt(netdev->irq, netdev, NULL);
 539
 540         netif_start_queue(netdev);
 541
 542         ibmveth_debug_printk("open complete\n");
 543
 544         return 0;
 545 }
 546
 547 static int ibmveth_close(struct net_device *netdev)
 548 {
 549         struct ibmveth_adapter *adapter = netdev->priv;
 550         long lpar_rc;
 551
 552         ibmveth_debug_printk("close starting\n");
 553
 554         netif_stop_queue(netdev);
 555
 556         free_irq(netdev->irq, netdev);
 557
 558         do {
 559                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 560         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
 561
 562         if(lpar_rc != H_Success)
 563         {
 564                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 565                                      lpar_rc);
 566         }
 567
 568         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 569
 570         ibmveth_cleanup(adapter);
 571
 572         ibmveth_debug_printk("close complete\n");
 573
 574         return 0;
 575 }
 576
 577 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 578         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 579         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 580         cmd->speed = SPEED_1000;
 581         cmd->duplex = DUPLEX_FULL;
 582         cmd->port = PORT_FIBRE;
 583         cmd->phy_address = 0;
 584         cmd->transceiver = XCVR_INTERNAL;
 585         cmd->autoneg = AUTONEG_ENABLE;
 586         cmd->maxtxpkt = 0;
 587         cmd->maxrxpkt = 1;
 588         return 0;
 589 }
 590
 591 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 592         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 593         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 594 }
 595
 596 static u32 netdev_get_link(struct net_device *dev) {
 597         return 1;
 598 }
 599
 600 static struct ethtool_ops netdev_ethtool_ops = {
 601         .get_drvinfo            = netdev_get_drvinfo,
 602         .get_settings           = netdev_get_settings,
 603         .get_link               = netdev_get_link,
 604         .get_sg                 = ethtool_op_get_sg,
 605         .get_tx_csum            = ethtool_op_get_tx_csum,
 606 };
 607
 608 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 609 {
 610         return -EOPNOTSUPP;
 611 }
 612
 613 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 614
 615 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 616 {
 617         struct ibmveth_adapter *adapter = netdev->priv;
 618         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 619         unsigned long lpar_rc;
 620         int nfrags = 0, curfrag;
 621         unsigned long correlator;
 622         unsigned long flags;
 623         unsigned int retry_count;
 624         unsigned int tx_dropped = 0;
 625         unsigned int tx_bytes = 0;
 626         unsigned int tx_packets = 0;
 627         unsigned int tx_send_failed = 0;
 628         unsigned int tx_map_failed = 0;
 629
 630
 631         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 632                 tx_dropped++;
 633                 goto out;
 634         }
 635
 636         memset(&desc, 0, sizeof(desc));
 637
 638         /* nfrags = number of frags after the initial fragment */
 639         nfrags = skb_shinfo(skb)->nr_frags;
 640
 641         if(nfrags)
 642                 adapter->tx_multidesc_send++;
 643
 644         /* map the initial fragment */
 645         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 646         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 647                                         desc[0].fields.length, DMA_TO_DEVICE);
 648         desc[0].fields.valid   = 1;
 649
 650         if(dma_mapping_error(desc[0].fields.address)) {
 651                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 652                 tx_map_failed++;
 653                 tx_dropped++;
 654                 goto out;
 655         }
 656
 657         curfrag = nfrags;
 658
 659         /* map fragments past the initial portion if there are any */
 660         while(curfrag--) {
 661                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 662                 desc[curfrag+1].fields.address
 663                         = dma_map_single(&adapter->vdev->dev,
 664                                 page_address(frag->page) + frag->page_offset,
 665                                 frag->size, DMA_TO_DEVICE);
 666                 desc[curfrag+1].fields.length = frag->size;
 667                 desc[curfrag+1].fields.valid  = 1;
 668
 669                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 670                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 671                         tx_map_failed++;
 672                         tx_dropped++;
 673                         /* Free all the mappings we just created */
 674                         while(curfrag < nfrags) {
 675                                 dma_unmap_single(&adapter->vdev->dev,
 676                                                  desc[curfrag+1].fields.address,
 677                                                  desc[curfrag+1].fields.length,
 678                                                  DMA_TO_DEVICE);
 679                                 curfrag++;
 680                         }
 681                         goto out;
 682                 }
 683         }
 684
 685         /* send the frame. Arbitrarily set retrycount to 1024 */
 686         correlator = 0;
 687         retry_count = 1024;
 688         do {
 689                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 690                                              desc[0].desc,
 691                                              desc[1].desc,
 692                                              desc[2].desc,
 693                                              desc[3].desc,
 694                                              desc[4].desc,
 695                                              desc[5].desc,
 696                                              correlator);
 697         } while ((lpar_rc == H_Busy) && (retry_count--));
 698
 699         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
 700                 int i;
 701                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 702                 for(i = 0; i < 6; i++) {
 703                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 704                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 705                 }
 706                 tx_send_failed++;
 707                 tx_dropped++;
 708         } else {
 709                 tx_packets++;
 710                 tx_bytes += skb->len;
 711                 netdev->trans_start = jiffies;
 712         }
 713
 714         do {
 715                 dma_unmap_single(&adapter->vdev->dev,
 716                                 desc[nfrags].fields.address,
 717                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 718         } while(--nfrags >= 0);
 719
 720 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 721         adapter->stats.tx_dropped += tx_dropped;
 722         adapter->stats.tx_bytes += tx_bytes;
 723         adapter->stats.tx_packets += tx_packets;
 724         adapter->tx_send_failed += tx_send_failed;
 725         adapter->tx_map_failed += tx_map_failed;
 726         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 727
 728         dev_kfree_skb(skb);
 729         return 0;
 730 }
 731
 732 static int ibmveth_poll(struct net_device *netdev, int *budget)
 733 {
 734         struct ibmveth_adapter *adapter = netdev->priv;
 735         int max_frames_to_process = netdev->quota;
 736         int frames_processed = 0;
 737         int more_work = 1;
 738         unsigned long lpar_rc;
 739
 740  restart_poll:
 741         do {
 742                 struct net_device *netdev = adapter->netdev;
 743
 744                 if(ibmveth_rxq_pending_buffer(adapter)) {
 745                         struct sk_buff *skb;
 746
 747                         rmb();
 748
 749                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 750                                 wmb(); /* suggested by larson1 */
 751                                 adapter->rx_invalid_buffer++;
 752                                 ibmveth_debug_printk("recycling invalid buffer\n");
 753                                 ibmveth_rxq_recycle_buffer(adapter);
 754                         } else {
 755                                 int length = ibmveth_rxq_frame_length(adapter);
 756                                 int offset = ibmveth_rxq_frame_offset(adapter);
 757                                 skb = ibmveth_rxq_get_buffer(adapter);
 758
 759                                 ibmveth_rxq_harvest_buffer(adapter);
 760
 761                                 skb_reserve(skb, offset);
 762                                 skb_put(skb, length);
 763                                 skb->dev = netdev;
 764                                 skb->protocol = eth_type_trans(skb, netdev);
 765
 766                                 netif_receive_skb(skb); /* send it up */
 767
 768                                 adapter->stats.rx_packets++;
 769                                 adapter->stats.rx_bytes += length;
 770                                 frames_processed++;
 771                                 netdev->last_rx = jiffies;
 772                         }
 773                 } else {
 774                         more_work = 0;
 775                 }
 776         } while(more_work && (frames_processed < max_frames_to_process));
 777
 778         ibmveth_replenish_task(adapter);
 779
 780         if(more_work) {
 781                 /* more work to do - return that we are not done yet */
 782                 netdev->quota -= frames_processed;
 783                 *budget -= frames_processed;
 784                 return 1;
 785         }
 786
 787         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 788         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 789
 790         ibmveth_assert(lpar_rc == H_Success);
 791
 792         netif_rx_complete(netdev);
 793
 794         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 795         {
 796                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 797                 ibmveth_assert(lpar_rc == H_Success);
 798                 more_work = 1;
 799                 goto restart_poll;
 800         }
 801
 802         netdev->quota -= frames_processed;
 803         *budget -= frames_processed;
 804
 805         /* we really are done */
 806         return 0;
 807 }
 808
 809 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 810 {
 811         struct net_device *netdev = dev_instance;
 812         struct ibmveth_adapter *adapter = netdev->priv;
 813         unsigned long lpar_rc;
 814
 815         if(netif_rx_schedule_prep(netdev)) {
 816                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 817                 ibmveth_assert(lpar_rc == H_Success);
 818                 __netif_rx_schedule(netdev);
 819         }
 820         return IRQ_HANDLED;
 821 }
 822
 823 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 824 {
 825         struct ibmveth_adapter *adapter = dev->priv;
 826         return &adapter->stats;
 827 }
 828
 829 static void ibmveth_set_multicast_list(struct net_device *netdev)
 830 {
 831         struct ibmveth_adapter *adapter = netdev->priv;
 832         unsigned long lpar_rc;
 833
 834         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 835                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 836                                            IbmVethMcastEnableRecv |
 837                                            IbmVethMcastDisableFiltering,
 838                                            0);
 839                 if(lpar_rc != H_Success) {
 840                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 841                 }
 842         } else {
 843                 struct dev_mc_list *mclist = netdev->mc_list;
 844                 int i;
 845                 /* clear the filter table & disable filtering */
 846                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 847                                            IbmVethMcastEnableRecv |
 848                                            IbmVethMcastDisableFiltering |
 849                                            IbmVethMcastClearFilterTable,
 850                                            0);
 851                 if(lpar_rc != H_Success) {
 852                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 853                 }
 854                 /* add the addresses to the filter table */
 855                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 856                         // add the multicast address to the filter table
 857                         unsigned long mcast_addr = 0;
 858                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 859                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 860                                                    IbmVethMcastAddFilter,
 861                                                    mcast_addr);
 862                         if(lpar_rc != H_Success) {
 863                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 864                         }
 865                 }
 866
 867                 /* re-enable filtering */
 868                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 869                                            IbmVethMcastEnableFiltering,
 870                                            0);
 871                 if(lpar_rc != H_Success) {
 872                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 873                 }
 874         }
 875 }
 876
 877 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 878 {
 879         struct ibmveth_adapter *adapter = dev->priv;
 880         int i;
 881         int prev_smaller = 1;
 882
 883         if ((new_mtu < 68) ||
 884             (new_mtu > (pool_size[IbmVethNumBufferPools-1]) - IBMVETH_BUFF_OH))
 885                 return -EINVAL;
 886
 887         for(i = 0; i<IbmVethNumBufferPools; i++) {
 888                 int activate = 0;
 889                 if (new_mtu > (pool_size[i]  - IBMVETH_BUFF_OH)) {
 890                         activate = 1;
 891                         prev_smaller= 1;
 892                 } else {
 893                         if (prev_smaller)
 894                                 activate = 1;
 895                         prev_smaller= 0;
 896                 }
 897
 898                 if (activate && !adapter->rx_buff_pool[i].active) {
 899                         struct ibmveth_buff_pool *pool =
 900                                                 &adapter->rx_buff_pool[i];
 901                         if(ibmveth_alloc_buffer_pool(pool)) {
 902                                 ibmveth_error_printk("unable to alloc pool\n");
 903                                 return -ENOMEM;
 904                         }
 905                         adapter->rx_buff_pool[i].active = 1;
 906                 } else if (!activate && adapter->rx_buff_pool[i].active) {
 907                         adapter->rx_buff_pool[i].active = 0;
 908                         h_free_logical_lan_buffer(adapter->vdev->unit_address,
 909                                           (u64)pool_size[i]);
 910                 }
 911
 912         }
 913
 914         /* kick the interrupt handler so that the new buffer pools get
 915            replenished or deallocated */
 916         ibmveth_interrupt(dev->irq, dev, NULL);
 917
 918         dev->mtu = new_mtu;
 919         return 0;
 920 }
 921
 922 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 923 {
 924         int rc, i;
 925         struct net_device *netdev;
 926         struct ibmveth_adapter *adapter = NULL;
 927
 928         unsigned char *mac_addr_p;
 929         unsigned int *mcastFilterSize_p;
 930
 931
 932         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 933                                         dev->unit_address);
 934
 935         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 936         if(!mac_addr_p) {
 937                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 938                                 "attribute\n", __FILE__, __LINE__);
 939                 return 0;
 940         }
 941
 942         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 943         if(!mcastFilterSize_p) {
 944                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 945                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 946                                 __FILE__, __LINE__);
 947                 return 0;
 948         }
 949
 950         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 951
 952         if(!netdev)
 953                 return -ENOMEM;
 954
 955         SET_MODULE_OWNER(netdev);
 956
 957         adapter = netdev->priv;
 958         memset(adapter, 0, sizeof(adapter));
 959         dev->dev.driver_data = netdev;
 960
 961         adapter->vdev = dev;
 962         adapter->netdev = netdev;
 963         adapter->mcastFilterSize= *mcastFilterSize_p;
 964
 965         /*      Some older boxes running PHYP non-natively have an OF that
 966                 returns a 8-byte local-mac-address field (and the first
 967                 2 bytes have to be ignored) while newer boxes' OF return
 968                 a 6-byte field. Note that IEEE 1275 specifies that
 969                 local-mac-address must be a 6-byte field.
 970                 The RPA doc specifies that the first byte must be 10b, so
 971                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 972
 973         if ((*mac_addr_p & 0x3) != 0x02)
 974                 mac_addr_p += 2;
 975
 976         adapter->mac_addr = 0;
 977         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 978
 979         adapter->liobn = dev->iommu_table->it_index;
 980
 981         netdev->irq = dev->irq;
 982         netdev->open               = ibmveth_open;
 983         netdev->poll               = ibmveth_poll;
 984         netdev->weight             = 16;
 985         netdev->stop               = ibmveth_close;
 986         netdev->hard_start_xmit    = ibmveth_start_xmit;
 987         netdev->get_stats          = ibmveth_get_stats;
 988         netdev->set_multicast_list = ibmveth_set_multicast_list;
 989         netdev->do_ioctl           = ibmveth_ioctl;
 990         netdev->ethtool_ops           = &netdev_ethtool_ops;
 991         netdev->change_mtu         = ibmveth_change_mtu;
 992         SET_NETDEV_DEV(netdev, &dev->dev);
 993         netdev->features |= NETIF_F_LLTX;
 994         spin_lock_init(&adapter->stats_lock);
 995
 996         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 997
 998         for(i = 0; i<IbmVethNumBufferPools; i++)
 999                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1000                                          pool_count[i], pool_size[i]);
1001
1002         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1003
1004         adapter->buffer_list_dma = DMA_ERROR_CODE;
1005         adapter->filter_list_dma = DMA_ERROR_CODE;
1006         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1007
1008         ibmveth_debug_printk("registering netdev...\n");
1009
1010         rc = register_netdev(netdev);
1011
1012         if(rc) {
1013                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1014                 free_netdev(netdev);
1015                 return rc;
1016         }
1017
1018         ibmveth_debug_printk("registered\n");
1019
1020         ibmveth_proc_register_adapter(adapter);
1021
1022         return 0;
1023 }
1024
1025 static int __devexit ibmveth_remove(struct vio_dev *dev)
1026 {
1027         struct net_device *netdev = dev->dev.driver_data;
1028         struct ibmveth_adapter *adapter = netdev->priv;
1029
1030         unregister_netdev(netdev);
1031
1032         ibmveth_proc_unregister_adapter(adapter);
1033
1034         free_netdev(netdev);
1035         return 0;
1036 }
1037
1038 #ifdef CONFIG_PROC_FS
1039 static void ibmveth_proc_register_driver(void)
1040 {
1041         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1042         if (ibmveth_proc_dir) {
1043                 SET_MODULE_OWNER(ibmveth_proc_dir);
1044         }
1045 }
1046
1047 static void ibmveth_proc_unregister_driver(void)
1048 {
1049         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1050 }
1051
1052 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1053 {
1054         if (*pos == 0) {
1055                 return (void *)1;
1056         } else {
1057                 return NULL;
1058         }
1059 }
1060
1061 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1062 {
1063         ++*pos;
1064         return NULL;
1065 }
1066
1067 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1068 {
1069 }
1070
1071 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1072 {
1073         struct ibmveth_adapter *adapter = seq->private;
1074         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1075         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1076
1077         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1078
1079         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1080         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1081         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1082                    current_mac[0], current_mac[1], current_mac[2],
1083                    current_mac[3], current_mac[4], current_mac[5]);
1084         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1085                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1086                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1087
1088         seq_printf(seq, "\nAdapter Statistics:\n");
1089         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1090         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1091         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1092         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1093         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1094         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1095         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1096         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1097         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1098         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1099
1100         return 0;
1101 }
1102 static struct seq_operations ibmveth_seq_ops = {
1103         .start = ibmveth_seq_start,
1104         .next  = ibmveth_seq_next,
1105         .stop  = ibmveth_seq_stop,
1106         .show  = ibmveth_seq_show,
1107 };
1108
1109 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1110 {
1111         struct seq_file *seq;
1112         struct proc_dir_entry *proc;
1113         int rc;
1114
1115         rc = seq_open(file, &ibmveth_seq_ops);
1116         if (!rc) {
1117                 /* recover the pointer buried in proc_dir_entry data */
1118                 seq = file->private_data;
1119                 proc = PDE(inode);
1120                 seq->private = proc->data;
1121         }
1122         return rc;
1123 }
1124
1125 static struct file_operations ibmveth_proc_fops = {
1126         .owner   = THIS_MODULE,
1127         .open    = ibmveth_proc_open,
1128         .read    = seq_read,
1129         .llseek  = seq_lseek,
1130         .release = seq_release,
1131 };
1132
1133 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1134 {
1135         struct proc_dir_entry *entry;
1136         if (ibmveth_proc_dir) {
1137                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1138                 if (!entry) {
1139                         ibmveth_error_printk("Cannot create adapter proc entry");
1140                 } else {
1141                         entry->data = (void *) adapter;
1142                         entry->proc_fops = &ibmveth_proc_fops;
1143                         SET_MODULE_OWNER(entry);
1144                 }
1145         }
1146         return;
1147 }
1148
1149 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1150 {
1151         if (ibmveth_proc_dir) {
1152                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1153         }
1154 }
1155
1156 #else /* CONFIG_PROC_FS */
1157 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1158 {
1159 }
1160
1161 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1162 {
1163 }
1164 static void ibmveth_proc_register_driver(void)
1165 {
1166 }
1167
1168 static void ibmveth_proc_unregister_driver(void)
1169 {
1170 }
1171 #endif /* CONFIG_PROC_FS */
1172
1173 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1174         { "network", "IBM,l-lan"},
1175         { "", "" }
1176 };
1177 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1178
1179 static struct vio_driver ibmveth_driver = {
1180         .id_table       = ibmveth_device_table,
1181         .probe          = ibmveth_probe,
1182         .remove         = ibmveth_remove,
1183         .driver         = {
1184                 .name   = ibmveth_driver_name,
1185                 .owner  = THIS_MODULE,
1186         }
1187 };
1188
1189 static int __init ibmveth_module_init(void)
1190 {
1191         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1192
1193         ibmveth_proc_register_driver();
1194
1195         return vio_register_driver(&ibmveth_driver);
1196 }
1197
1198 static void __exit ibmveth_module_exit(void)
1199 {
1200         vio_unregister_driver(&ibmveth_driver);
1201         ibmveth_proc_unregister_driver();
1202 }
1203
1204 module_init(ibmveth_module_init);
1205 module_exit(ibmveth_module_exit);