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_schedule_replenishing(struct ibmveth_adapter*);
 100 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
 101
 102 #ifdef CONFIG_PROC_FS
 103 #define IBMVETH_PROC_DIR "net/ibmveth"
 104 static struct proc_dir_entry *ibmveth_proc_dir;
 105 #endif
 106
 107 static const char ibmveth_driver_name[] = "ibmveth";
 108 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 109 #define ibmveth_driver_version "1.03"
 110
 111 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 112 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 113 MODULE_LICENSE("GPL");
 114 MODULE_VERSION(ibmveth_driver_version);
 115
 116 /* simple methods of getting data from the current rxq entry */
 117 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 118 {
 119         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 120 }
 121
 122 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 123 {
 124         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 125 }
 126
 127 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 128 {
 129         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 130 }
 131
 132 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 133 {
 134         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 135 }
 136
 137 /* setup the initial settings for a buffer pool */
 138 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size)
 139 {
 140         pool->size = pool_size;
 141         pool->index = pool_index;
 142         pool->buff_size = buff_size;
 143         pool->threshold = pool_size / 2;
 144 }
 145
 146 /* allocate and setup an buffer pool - called during open */
 147 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 148 {
 149         int i;
 150
 151         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
 152
 153         if(!pool->free_map) {
 154                 return -1;
 155         }
 156
 157         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
 158         if(!pool->dma_addr) {
 159                 kfree(pool->free_map);
 160                 pool->free_map = NULL;
 161                 return -1;
 162         }
 163
 164         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
 165
 166         if(!pool->skbuff) {
 167                 kfree(pool->dma_addr);
 168                 pool->dma_addr = NULL;
 169
 170                 kfree(pool->free_map);
 171                 pool->free_map = NULL;
 172                 return -1;
 173         }
 174
 175         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
 176         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
 177
 178         for(i = 0; i < pool->size; ++i) {
 179                 pool->free_map[i] = i;
 180         }
 181
 182         atomic_set(&pool->available, 0);
 183         pool->producer_index = 0;
 184         pool->consumer_index = 0;
 185         pool->active = 0;
 186
 187         return 0;
 188 }
 189
 190 /* replenish the buffers for a pool.  note that we don't need to
 191  * skb_reserve these since they are used for incoming...
 192  */
 193 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 194 {
 195         u32 i;
 196         u32 count = pool->size - atomic_read(&pool->available);
 197         u32 buffers_added = 0;
 198
 199         mb();
 200
 201         for(i = 0; i < count; ++i) {
 202                 struct sk_buff *skb;
 203                 unsigned int free_index, index;
 204                 u64 correlator;
 205                 union ibmveth_buf_desc desc;
 206                 unsigned long lpar_rc;
 207                 dma_addr_t dma_addr;
 208
 209                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 210
 211                 if(!skb) {
 212                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 213                         adapter->replenish_no_mem++;
 214                         break;
 215                 }
 216
 217                 free_index = pool->consumer_index++ % pool->size;
 218                 index = pool->free_map[free_index];
 219
 220                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
 221                 ibmveth_assert(pool->skbuff[index] == NULL);
 222
 223                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
 224                                 pool->buff_size, DMA_FROM_DEVICE);
 225
 226                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 227                 pool->dma_addr[index] = dma_addr;
 228                 pool->skbuff[index] = skb;
 229
 230                 correlator = ((u64)pool->index << 32) | index;
 231                 *(u64*)skb->data = correlator;
 232
 233                 desc.desc = 0;
 234                 desc.fields.valid = 1;
 235                 desc.fields.length = pool->buff_size;
 236                 desc.fields.address = dma_addr;
 237
 238                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 239
 240                 if(lpar_rc != H_Success) {
 241                         pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 242                         pool->skbuff[index] = NULL;
 243                         pool->consumer_index--;
 244                         dma_unmap_single(&adapter->vdev->dev,
 245                                         pool->dma_addr[index], pool->buff_size,
 246                                         DMA_FROM_DEVICE);
 247                         dev_kfree_skb_any(skb);
 248                         adapter->replenish_add_buff_failure++;
 249                         break;
 250                 } else {
 251                         buffers_added++;
 252                         adapter->replenish_add_buff_success++;
 253                 }
 254         }
 255
 256         mb();
 257         atomic_add(buffers_added, &(pool->available));
 258 }
 259
 260 /* check if replenishing is needed.  */
 261 static inline int ibmveth_is_replenishing_needed(struct ibmveth_adapter *adapter)
 262 {
 263         int i;
 264
 265         for(i = 0; i < IbmVethNumBufferPools; i++)
 266                 if(adapter->rx_buff_pool[i].active &&
 267                   (atomic_read(&adapter->rx_buff_pool[i].available) <
 268                    adapter->rx_buff_pool[i].threshold))
 269                         return 1;
 270         return 0;
 271 }
 272
 273 /* kick the replenish tasklet if we need replenishing and it isn't already running */
 274 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter *adapter)
 275 {
 276         if(ibmveth_is_replenishing_needed(adapter) &&
 277            (atomic_dec_if_positive(&adapter->not_replenishing) == 0)) {
 278                 schedule_work(&adapter->replenish_task);
 279         }
 280 }
 281
 282 /* replenish tasklet routine */
 283 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 284 {
 285         int i;
 286
 287         adapter->replenish_task_cycles++;
 288
 289         for(i = 0; i < IbmVethNumBufferPools; i++)
 290                 if(adapter->rx_buff_pool[i].active)
 291                         ibmveth_replenish_buffer_pool(adapter,
 292                                                      &adapter->rx_buff_pool[i]);
 293
 294         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 295
 296         atomic_inc(&adapter->not_replenishing);
 297
 298         ibmveth_schedule_replenishing(adapter);
 299 }
 300
 301 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 302 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 303 {
 304         int i;
 305
 306         if(pool->free_map) {
 307                 kfree(pool->free_map);
 308                 pool->free_map  = NULL;
 309         }
 310
 311         if(pool->skbuff && pool->dma_addr) {
 312                 for(i = 0; i < pool->size; ++i) {
 313                         struct sk_buff *skb = pool->skbuff[i];
 314                         if(skb) {
 315                                 dma_unmap_single(&adapter->vdev->dev,
 316                                                  pool->dma_addr[i],
 317                                                  pool->buff_size,
 318                                                  DMA_FROM_DEVICE);
 319                                 dev_kfree_skb_any(skb);
 320                                 pool->skbuff[i] = NULL;
 321                         }
 322                 }
 323         }
 324
 325         if(pool->dma_addr) {
 326                 kfree(pool->dma_addr);
 327                 pool->dma_addr = NULL;
 328         }
 329
 330         if(pool->skbuff) {
 331                 kfree(pool->skbuff);
 332                 pool->skbuff = NULL;
 333         }
 334         pool->active = 0;
 335 }
 336
 337 /* remove a buffer from a pool */
 338 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 339 {
 340         unsigned int pool  = correlator >> 32;
 341         unsigned int index = correlator & 0xffffffffUL;
 342         unsigned int free_index;
 343         struct sk_buff *skb;
 344
 345         ibmveth_assert(pool < IbmVethNumBufferPools);
 346         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 347
 348         skb = adapter->rx_buff_pool[pool].skbuff[index];
 349
 350         ibmveth_assert(skb != NULL);
 351
 352         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 353
 354         dma_unmap_single(&adapter->vdev->dev,
 355                          adapter->rx_buff_pool[pool].dma_addr[index],
 356                          adapter->rx_buff_pool[pool].buff_size,
 357                          DMA_FROM_DEVICE);
 358
 359         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 360         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 361
 362         mb();
 363
 364         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 365 }
 366
 367 /* get the current buffer on the rx queue */
 368 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 369 {
 370         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 371         unsigned int pool = correlator >> 32;
 372         unsigned int index = correlator & 0xffffffffUL;
 373
 374         ibmveth_assert(pool < IbmVethNumBufferPools);
 375         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 376
 377         return adapter->rx_buff_pool[pool].skbuff[index];
 378 }
 379
 380 /* recycle the current buffer on the rx queue */
 381 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 382 {
 383         u32 q_index = adapter->rx_queue.index;
 384         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 385         unsigned int pool = correlator >> 32;
 386         unsigned int index = correlator & 0xffffffffUL;
 387         union ibmveth_buf_desc desc;
 388         unsigned long lpar_rc;
 389
 390         ibmveth_assert(pool < IbmVethNumBufferPools);
 391         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 392
 393         if(!adapter->rx_buff_pool[pool].active) {
 394                 ibmveth_rxq_harvest_buffer(adapter);
 395                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 396                 return;
 397         }
 398
 399         desc.desc = 0;
 400         desc.fields.valid = 1;
 401         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 402         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 403
 404         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 405
 406         if(lpar_rc != H_Success) {
 407                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 408                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 409         }
 410
 411         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 412                 adapter->rx_queue.index = 0;
 413                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 414         }
 415 }
 416
 417 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 418 {
 419         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 420
 421         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 422                 adapter->rx_queue.index = 0;
 423                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 424         }
 425 }
 426
 427 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 428 {
 429         int i;
 430
 431         if(adapter->buffer_list_addr != NULL) {
 432                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 433                         dma_unmap_single(&adapter->vdev->dev,
 434                                         adapter->buffer_list_dma, 4096,
 435                                         DMA_BIDIRECTIONAL);
 436                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 437                 }
 438                 free_page((unsigned long)adapter->buffer_list_addr);
 439                 adapter->buffer_list_addr = NULL;
 440         }
 441
 442         if(adapter->filter_list_addr != NULL) {
 443                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 444                         dma_unmap_single(&adapter->vdev->dev,
 445                                         adapter->filter_list_dma, 4096,
 446                                         DMA_BIDIRECTIONAL);
 447                         adapter->filter_list_dma = DMA_ERROR_CODE;
 448                 }
 449                 free_page((unsigned long)adapter->filter_list_addr);
 450                 adapter->filter_list_addr = NULL;
 451         }
 452
 453         if(adapter->rx_queue.queue_addr != NULL) {
 454                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 455                         dma_unmap_single(&adapter->vdev->dev,
 456                                         adapter->rx_queue.queue_dma,
 457                                         adapter->rx_queue.queue_len,
 458                                         DMA_BIDIRECTIONAL);
 459                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 460                 }
 461                 kfree(adapter->rx_queue.queue_addr);
 462                 adapter->rx_queue.queue_addr = NULL;
 463         }
 464
 465         for(i = 0; i<IbmVethNumBufferPools; i++)
 466                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[i]);
 467 }
 468
 469 static int ibmveth_open(struct net_device *netdev)
 470 {
 471         struct ibmveth_adapter *adapter = netdev->priv;
 472         u64 mac_address = 0;
 473         int rxq_entries = 1;
 474         unsigned long lpar_rc;
 475         int rc;
 476         union ibmveth_buf_desc rxq_desc;
 477         int i;
 478
 479         ibmveth_debug_printk("open starting\n");
 480
 481         for(i = 0; i<IbmVethNumBufferPools; i++)
 482                 rxq_entries += adapter->rx_buff_pool[i].size;
 483
 484         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 485         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 486
 487         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 488                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 489                 ibmveth_cleanup(adapter);
 490                 return -ENOMEM;
 491         }
 492
 493         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 494         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 495
 496         if(!adapter->rx_queue.queue_addr) {
 497                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 498                 ibmveth_cleanup(adapter);
 499                 return -ENOMEM;
 500         }
 501
 502         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 503                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 504         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 505                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 506         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 507                         adapter->rx_queue.queue_addr,
 508                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 509
 510         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 511            (dma_mapping_error(adapter->filter_list_dma)) ||
 512            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 513                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 514                 ibmveth_cleanup(adapter);
 515                 return -ENOMEM;
 516         }
 517
 518         adapter->rx_queue.index = 0;
 519         adapter->rx_queue.num_slots = rxq_entries;
 520         adapter->rx_queue.toggle = 1;
 521
 522         /* call change_mtu to init the buffer pools based in initial mtu */
 523         ibmveth_change_mtu(netdev, netdev->mtu);
 524
 525         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 526         mac_address = mac_address >> 16;
 527
 528         rxq_desc.desc = 0;
 529         rxq_desc.fields.valid = 1;
 530         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 531         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 532
 533         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 534         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 535         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 536
 537
 538         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 539                                          adapter->buffer_list_dma,
 540                                          rxq_desc.desc,
 541                                          adapter->filter_list_dma,
 542                                          mac_address);
 543
 544         if(lpar_rc != H_Success) {
 545                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 546                 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
 547                                      adapter->buffer_list_dma,
 548                                      adapter->filter_list_dma,
 549                                      rxq_desc.desc,
 550                                      mac_address);
 551                 ibmveth_cleanup(adapter);
 552                 return -ENONET;
 553         }
 554
 555         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 556         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 557                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 558                 do {
 559                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 560                 } while (H_isLongBusy(rc) || (rc == H_Busy));
 561
 562                 ibmveth_cleanup(adapter);
 563                 return rc;
 564         }
 565
 566         netif_start_queue(netdev);
 567
 568         ibmveth_debug_printk("scheduling initial replenish cycle\n");
 569         ibmveth_schedule_replenishing(adapter);
 570
 571         ibmveth_debug_printk("open complete\n");
 572
 573         return 0;
 574 }
 575
 576 static int ibmveth_close(struct net_device *netdev)
 577 {
 578         struct ibmveth_adapter *adapter = netdev->priv;
 579         long lpar_rc;
 580
 581         ibmveth_debug_printk("close starting\n");
 582
 583         netif_stop_queue(netdev);
 584
 585         free_irq(netdev->irq, netdev);
 586
 587         cancel_delayed_work(&adapter->replenish_task);
 588         flush_scheduled_work();
 589
 590         do {
 591                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 592         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
 593
 594         if(lpar_rc != H_Success)
 595         {
 596                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 597                                      lpar_rc);
 598         }
 599
 600         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 601
 602         ibmveth_cleanup(adapter);
 603
 604         ibmveth_debug_printk("close complete\n");
 605
 606         return 0;
 607 }
 608
 609 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 610         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 611         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 612         cmd->speed = SPEED_1000;
 613         cmd->duplex = DUPLEX_FULL;
 614         cmd->port = PORT_FIBRE;
 615         cmd->phy_address = 0;
 616         cmd->transceiver = XCVR_INTERNAL;
 617         cmd->autoneg = AUTONEG_ENABLE;
 618         cmd->maxtxpkt = 0;
 619         cmd->maxrxpkt = 1;
 620         return 0;
 621 }
 622
 623 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 624         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 625         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 626 }
 627
 628 static u32 netdev_get_link(struct net_device *dev) {
 629         return 1;
 630 }
 631
 632 static struct ethtool_ops netdev_ethtool_ops = {
 633         .get_drvinfo            = netdev_get_drvinfo,
 634         .get_settings           = netdev_get_settings,
 635         .get_link               = netdev_get_link,
 636         .get_sg                 = ethtool_op_get_sg,
 637         .get_tx_csum            = ethtool_op_get_tx_csum,
 638 };
 639
 640 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 641 {
 642         return -EOPNOTSUPP;
 643 }
 644
 645 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 646
 647 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 648 {
 649         struct ibmveth_adapter *adapter = netdev->priv;
 650         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 651         unsigned long lpar_rc;
 652         int nfrags = 0, curfrag;
 653         unsigned long correlator;
 654         unsigned int retry_count;
 655
 656         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 657                 adapter->stats.tx_dropped++;
 658                 dev_kfree_skb(skb);
 659                 return 0;
 660         }
 661
 662         memset(&desc, 0, sizeof(desc));
 663
 664         /* nfrags = number of frags after the initial fragment */
 665         nfrags = skb_shinfo(skb)->nr_frags;
 666
 667         if(nfrags)
 668                 adapter->tx_multidesc_send++;
 669
 670         /* map the initial fragment */
 671         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 672         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 673                                         desc[0].fields.length, DMA_TO_DEVICE);
 674         desc[0].fields.valid   = 1;
 675
 676         if(dma_mapping_error(desc[0].fields.address)) {
 677                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 678                 adapter->tx_map_failed++;
 679                 adapter->stats.tx_dropped++;
 680                 dev_kfree_skb(skb);
 681                 return 0;
 682         }
 683
 684         curfrag = nfrags;
 685
 686         /* map fragments past the initial portion if there are any */
 687         while(curfrag--) {
 688                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 689                 desc[curfrag+1].fields.address
 690                         = dma_map_single(&adapter->vdev->dev,
 691                                 page_address(frag->page) + frag->page_offset,
 692                                 frag->size, DMA_TO_DEVICE);
 693                 desc[curfrag+1].fields.length = frag->size;
 694                 desc[curfrag+1].fields.valid  = 1;
 695
 696                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 697                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 698                         adapter->tx_map_failed++;
 699                         adapter->stats.tx_dropped++;
 700                         /* Free all the mappings we just created */
 701                         while(curfrag < nfrags) {
 702                                 dma_unmap_single(&adapter->vdev->dev,
 703                                                  desc[curfrag+1].fields.address,
 704                                                  desc[curfrag+1].fields.length,
 705                                                  DMA_TO_DEVICE);
 706                                 curfrag++;
 707                         }
 708                         dev_kfree_skb(skb);
 709                         return 0;
 710                 }
 711         }
 712
 713         /* send the frame. Arbitrarily set retrycount to 1024 */
 714         correlator = 0;
 715         retry_count = 1024;
 716         do {
 717                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 718                                              desc[0].desc,
 719                                              desc[1].desc,
 720                                              desc[2].desc,
 721                                              desc[3].desc,
 722                                              desc[4].desc,
 723                                              desc[5].desc,
 724                                              correlator);
 725         } while ((lpar_rc == H_Busy) && (retry_count--));
 726
 727         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
 728                 int i;
 729                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 730                 for(i = 0; i < 6; i++) {
 731                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 732                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 733                 }
 734                 adapter->tx_send_failed++;
 735                 adapter->stats.tx_dropped++;
 736         } else {
 737                 adapter->stats.tx_packets++;
 738                 adapter->stats.tx_bytes += skb->len;
 739                 netdev->trans_start = jiffies;
 740         }
 741
 742         do {
 743                 dma_unmap_single(&adapter->vdev->dev,
 744                                 desc[nfrags].fields.address,
 745                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 746         } while(--nfrags >= 0);
 747
 748         dev_kfree_skb(skb);
 749         return 0;
 750 }
 751
 752 static int ibmveth_poll(struct net_device *netdev, int *budget)
 753 {
 754         struct ibmveth_adapter *adapter = netdev->priv;
 755         int max_frames_to_process = netdev->quota;
 756         int frames_processed = 0;
 757         int more_work = 1;
 758         unsigned long lpar_rc;
 759
 760  restart_poll:
 761         do {
 762                 struct net_device *netdev = adapter->netdev;
 763
 764                 if(ibmveth_rxq_pending_buffer(adapter)) {
 765                         struct sk_buff *skb;
 766
 767                         rmb();
 768
 769                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 770                                 wmb(); /* suggested by larson1 */
 771                                 adapter->rx_invalid_buffer++;
 772                                 ibmveth_debug_printk("recycling invalid buffer\n");
 773                                 ibmveth_rxq_recycle_buffer(adapter);
 774                         } else {
 775                                 int length = ibmveth_rxq_frame_length(adapter);
 776                                 int offset = ibmveth_rxq_frame_offset(adapter);
 777                                 skb = ibmveth_rxq_get_buffer(adapter);
 778
 779                                 ibmveth_rxq_harvest_buffer(adapter);
 780
 781                                 skb_reserve(skb, offset);
 782                                 skb_put(skb, length);
 783                                 skb->dev = netdev;
 784                                 skb->protocol = eth_type_trans(skb, netdev);
 785
 786                                 netif_receive_skb(skb); /* send it up */
 787
 788                                 adapter->stats.rx_packets++;
 789                                 adapter->stats.rx_bytes += length;
 790                                 frames_processed++;
 791                                 netdev->last_rx = jiffies;
 792                         }
 793                 } else {
 794                         more_work = 0;
 795                 }
 796         } while(more_work && (frames_processed < max_frames_to_process));
 797
 798         ibmveth_schedule_replenishing(adapter);
 799
 800         if(more_work) {
 801                 /* more work to do - return that we are not done yet */
 802                 netdev->quota -= frames_processed;
 803                 *budget -= frames_processed;
 804                 return 1;
 805         }
 806
 807         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 808         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 809
 810         ibmveth_assert(lpar_rc == H_Success);
 811
 812         netif_rx_complete(netdev);
 813
 814         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 815         {
 816                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 817                 ibmveth_assert(lpar_rc == H_Success);
 818                 more_work = 1;
 819                 goto restart_poll;
 820         }
 821
 822         netdev->quota -= frames_processed;
 823         *budget -= frames_processed;
 824
 825         /* we really are done */
 826         return 0;
 827 }
 828
 829 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 830 {
 831         struct net_device *netdev = dev_instance;
 832         struct ibmveth_adapter *adapter = netdev->priv;
 833         unsigned long lpar_rc;
 834
 835         if(netif_rx_schedule_prep(netdev)) {
 836                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 837                 ibmveth_assert(lpar_rc == H_Success);
 838                 __netif_rx_schedule(netdev);
 839         }
 840         return IRQ_HANDLED;
 841 }
 842
 843 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 844 {
 845         struct ibmveth_adapter *adapter = dev->priv;
 846         return &adapter->stats;
 847 }
 848
 849 static void ibmveth_set_multicast_list(struct net_device *netdev)
 850 {
 851         struct ibmveth_adapter *adapter = netdev->priv;
 852         unsigned long lpar_rc;
 853
 854         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 855                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 856                                            IbmVethMcastEnableRecv |
 857                                            IbmVethMcastDisableFiltering,
 858                                            0);
 859                 if(lpar_rc != H_Success) {
 860                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 861                 }
 862         } else {
 863                 struct dev_mc_list *mclist = netdev->mc_list;
 864                 int i;
 865                 /* clear the filter table & disable filtering */
 866                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 867                                            IbmVethMcastEnableRecv |
 868                                            IbmVethMcastDisableFiltering |
 869                                            IbmVethMcastClearFilterTable,
 870                                            0);
 871                 if(lpar_rc != H_Success) {
 872                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 873                 }
 874                 /* add the addresses to the filter table */
 875                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 876                         // add the multicast address to the filter table
 877                         unsigned long mcast_addr = 0;
 878                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 879                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 880                                                    IbmVethMcastAddFilter,
 881                                                    mcast_addr);
 882                         if(lpar_rc != H_Success) {
 883                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 884                         }
 885                 }
 886
 887                 /* re-enable filtering */
 888                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 889                                            IbmVethMcastEnableFiltering,
 890                                            0);
 891                 if(lpar_rc != H_Success) {
 892                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 893                 }
 894         }
 895 }
 896
 897 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 898 {
 899         struct ibmveth_adapter *adapter = dev->priv;
 900         int i;
 901         int prev_smaller = 1;
 902
 903         if ((new_mtu < 68) ||
 904             (new_mtu > (pool_size[IbmVethNumBufferPools-1]) - IBMVETH_BUFF_OH))
 905                 return -EINVAL;
 906
 907         for(i = 0; i<IbmVethNumBufferPools; i++) {
 908                 int activate = 0;
 909                 if (new_mtu > (pool_size[i]  - IBMVETH_BUFF_OH)) {
 910                         activate = 1;
 911                         prev_smaller= 1;
 912                 } else {
 913                         if (prev_smaller)
 914                                 activate = 1;
 915                         prev_smaller= 0;
 916                 }
 917
 918                 if (activate && !adapter->rx_buff_pool[i].active) {
 919                         struct ibmveth_buff_pool *pool =
 920                                                 &adapter->rx_buff_pool[i];
 921                         if(ibmveth_alloc_buffer_pool(pool)) {
 922                                 ibmveth_error_printk("unable to alloc pool\n");
 923                                 return -ENOMEM;
 924                         }
 925                         adapter->rx_buff_pool[i].active = 1;
 926                 } else if (!activate && adapter->rx_buff_pool[i].active) {
 927                         adapter->rx_buff_pool[i].active = 0;
 928                         h_free_logical_lan_buffer(adapter->vdev->unit_address,
 929                                           (u64)pool_size[i]);
 930                 }
 931
 932         }
 933
 934
 935         ibmveth_schedule_replenishing(adapter);
 936         dev->mtu = new_mtu;
 937         return 0;
 938 }
 939
 940 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 941 {
 942         int rc, i;
 943         struct net_device *netdev;
 944         struct ibmveth_adapter *adapter = NULL;
 945
 946         unsigned char *mac_addr_p;
 947         unsigned int *mcastFilterSize_p;
 948
 949
 950         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 951                                         dev->unit_address);
 952
 953         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 954         if(!mac_addr_p) {
 955                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 956                                 "attribute\n", __FILE__, __LINE__);
 957                 return 0;
 958         }
 959
 960         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 961         if(!mcastFilterSize_p) {
 962                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 963                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 964                                 __FILE__, __LINE__);
 965                 return 0;
 966         }
 967
 968         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 969
 970         if(!netdev)
 971                 return -ENOMEM;
 972
 973         SET_MODULE_OWNER(netdev);
 974
 975         adapter = netdev->priv;
 976         memset(adapter, 0, sizeof(adapter));
 977         dev->dev.driver_data = netdev;
 978
 979         adapter->vdev = dev;
 980         adapter->netdev = netdev;
 981         adapter->mcastFilterSize= *mcastFilterSize_p;
 982
 983         /*      Some older boxes running PHYP non-natively have an OF that
 984                 returns a 8-byte local-mac-address field (and the first
 985                 2 bytes have to be ignored) while newer boxes' OF return
 986                 a 6-byte field. Note that IEEE 1275 specifies that
 987                 local-mac-address must be a 6-byte field.
 988                 The RPA doc specifies that the first byte must be 10b, so
 989                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 990
 991         if ((*mac_addr_p & 0x3) != 0x02)
 992                 mac_addr_p += 2;
 993
 994         adapter->mac_addr = 0;
 995         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 996
 997         adapter->liobn = dev->iommu_table->it_index;
 998
 999         netdev->irq = dev->irq;
1000         netdev->open               = ibmveth_open;
1001         netdev->poll               = ibmveth_poll;
1002         netdev->weight             = 16;
1003         netdev->stop               = ibmveth_close;
1004         netdev->hard_start_xmit    = ibmveth_start_xmit;
1005         netdev->get_stats          = ibmveth_get_stats;
1006         netdev->set_multicast_list = ibmveth_set_multicast_list;
1007         netdev->do_ioctl           = ibmveth_ioctl;
1008         netdev->ethtool_ops           = &netdev_ethtool_ops;
1009         netdev->change_mtu         = ibmveth_change_mtu;
1010         SET_NETDEV_DEV(netdev, &dev->dev);
1011
1012         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1013
1014         for(i = 0; i<IbmVethNumBufferPools; i++)
1015                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1016                                          pool_count[i], pool_size[i]);
1017
1018         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1019
1020         INIT_WORK(&adapter->replenish_task, (void*)ibmveth_replenish_task, (void*)adapter);
1021
1022         adapter->buffer_list_dma = DMA_ERROR_CODE;
1023         adapter->filter_list_dma = DMA_ERROR_CODE;
1024         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1025
1026         atomic_set(&adapter->not_replenishing, 1);
1027
1028         ibmveth_debug_printk("registering netdev...\n");
1029
1030         rc = register_netdev(netdev);
1031
1032         if(rc) {
1033                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1034                 free_netdev(netdev);
1035                 return rc;
1036         }
1037
1038         ibmveth_debug_printk("registered\n");
1039
1040         ibmveth_proc_register_adapter(adapter);
1041
1042         return 0;
1043 }
1044
1045 static int __devexit ibmveth_remove(struct vio_dev *dev)
1046 {
1047         struct net_device *netdev = dev->dev.driver_data;
1048         struct ibmveth_adapter *adapter = netdev->priv;
1049
1050         unregister_netdev(netdev);
1051
1052         ibmveth_proc_unregister_adapter(adapter);
1053
1054         free_netdev(netdev);
1055         return 0;
1056 }
1057
1058 #ifdef CONFIG_PROC_FS
1059 static void ibmveth_proc_register_driver(void)
1060 {
1061         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1062         if (ibmveth_proc_dir) {
1063                 SET_MODULE_OWNER(ibmveth_proc_dir);
1064         }
1065 }
1066
1067 static void ibmveth_proc_unregister_driver(void)
1068 {
1069         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1070 }
1071
1072 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1073 {
1074         if (*pos == 0) {
1075                 return (void *)1;
1076         } else {
1077                 return NULL;
1078         }
1079 }
1080
1081 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1082 {
1083         ++*pos;
1084         return NULL;
1085 }
1086
1087 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1088 {
1089 }
1090
1091 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1092 {
1093         struct ibmveth_adapter *adapter = seq->private;
1094         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1095         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1096
1097         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1098
1099         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1100         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1101         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1102                    current_mac[0], current_mac[1], current_mac[2],
1103                    current_mac[3], current_mac[4], current_mac[5]);
1104         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1105                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1106                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1107
1108         seq_printf(seq, "\nAdapter Statistics:\n");
1109         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1110         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1111         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1112         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1113         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1114         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1115         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1116         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1117         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1118         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1119
1120         return 0;
1121 }
1122 static struct seq_operations ibmveth_seq_ops = {
1123         .start = ibmveth_seq_start,
1124         .next  = ibmveth_seq_next,
1125         .stop  = ibmveth_seq_stop,
1126         .show  = ibmveth_seq_show,
1127 };
1128
1129 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1130 {
1131         struct seq_file *seq;
1132         struct proc_dir_entry *proc;
1133         int rc;
1134
1135         rc = seq_open(file, &ibmveth_seq_ops);
1136         if (!rc) {
1137                 /* recover the pointer buried in proc_dir_entry data */
1138                 seq = file->private_data;
1139                 proc = PDE(inode);
1140                 seq->private = proc->data;
1141         }
1142         return rc;
1143 }
1144
1145 static struct file_operations ibmveth_proc_fops = {
1146         .owner   = THIS_MODULE,
1147         .open    = ibmveth_proc_open,
1148         .read    = seq_read,
1149         .llseek  = seq_lseek,
1150         .release = seq_release,
1151 };
1152
1153 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1154 {
1155         struct proc_dir_entry *entry;
1156         if (ibmveth_proc_dir) {
1157                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1158                 if (!entry) {
1159                         ibmveth_error_printk("Cannot create adapter proc entry");
1160                 } else {
1161                         entry->data = (void *) adapter;
1162                         entry->proc_fops = &ibmveth_proc_fops;
1163                         SET_MODULE_OWNER(entry);
1164                 }
1165         }
1166         return;
1167 }
1168
1169 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1170 {
1171         if (ibmveth_proc_dir) {
1172                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1173         }
1174 }
1175
1176 #else /* CONFIG_PROC_FS */
1177 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1178 {
1179 }
1180
1181 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1182 {
1183 }
1184 static void ibmveth_proc_register_driver(void)
1185 {
1186 }
1187
1188 static void ibmveth_proc_unregister_driver(void)
1189 {
1190 }
1191 #endif /* CONFIG_PROC_FS */
1192
1193 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1194         { "network", "IBM,l-lan"},
1195         { "", "" }
1196 };
1197
1198 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1199
1200 static struct vio_driver ibmveth_driver = {
1201         .name        = (char *)ibmveth_driver_name,
1202         .id_table    = ibmveth_device_table,
1203         .probe       = ibmveth_probe,
1204         .remove      = ibmveth_remove
1205 };
1206
1207 static int __init ibmveth_module_init(void)
1208 {
1209         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1210
1211         ibmveth_proc_register_driver();
1212
1213         return vio_register_driver(&ibmveth_driver);
1214 }
1215
1216 static void __exit ibmveth_module_exit(void)
1217 {
1218         vio_unregister_driver(&ibmveth_driver);
1219         ibmveth_proc_unregister_driver();
1220 }
1221
1222 module_init(ibmveth_module_init);
1223 module_exit(ibmveth_module_exit);