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   1 /**************************************************************************/
   2 /*                                                                        */
   3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver                   */
   4 /* Copyright (C) 2003 IBM Corp.                                           */
   5 /*  Originally written by Dave Larson (larson1@us.ibm.com)                */
   6 /*  Maintained by Santiago Leon (santil@us.ibm.com)                       */
   7 /*                                                                        */
   8 /*  This program is free software; you can redistribute it and/or modify  */
   9 /*  it under the terms of the GNU General Public License as published by  */
  10 /*  the Free Software Foundation; either version 2 of the License, or     */
  11 /*  (at your option) any later version.                                   */
  12 /*                                                                        */
  13 /*  This program is distributed in the hope that it will be useful,       */
  14 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  15 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  16 /*  GNU General Public License for more details.                          */
  17 /*                                                                        */
  18 /*  You should have received a copy of the GNU General Public License     */
  19 /*  along with this program; if not, write to the Free Software           */
  20 /*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  */
  21 /*                                                                   USA  */
  22 /*                                                                        */
  23 /* This module contains the implementation of a virtual ethernet device   */
  24 /* for use with IBM i/pSeries LPAR Linux.  It utilizes the logical LAN    */
  25 /* option of the RS/6000 Platform Architechture to interface with virtual */
  26 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  27 /*                                                                        */
  28 /**************************************************************************/
  29 /*
  30   TODO:
  31   - remove frag processing code - no longer needed
  32   - add support for sysfs
  33   - possibly remove procfs support
  34 */
  35
  36 #include <linux/config.h>
  37 #include <linux/module.h>
  38 #include <linux/version.h>
  39 #include <linux/types.h>
  40 #include <linux/errno.h>
  41 #include <linux/ioport.h>
  42 #include <linux/dma-mapping.h>
  43 #include <linux/kernel.h>
  44 #include <linux/netdevice.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/skbuff.h>
  47 #include <linux/init.h>
  48 #include <linux/delay.h>
  49 #include <linux/mm.h>
  50 #include <linux/ethtool.h>
  51 #include <linux/proc_fs.h>
  52 #include <asm/semaphore.h>
  53 #include <asm/hvcall.h>
  54 #include <asm/atomic.h>
  55 #include <asm/iommu.h>
  56 #include <asm/vio.h>
  57 #include <asm/uaccess.h>
  58 #include <linux/seq_file.h>
  59
  60 #include "ibmveth.h"
  61
  62 #define DEBUG 1
  63
  64 #define ibmveth_printk(fmt, args...) \
  65   printk(KERN_INFO "%s: " fmt, __FILE__, ## args)
  66
  67 #define ibmveth_error_printk(fmt, args...) \
  68   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  69
  70 #ifdef DEBUG
  71 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
  72   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
  73 #define ibmveth_debug_printk(fmt, args...) \
  74   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  75 #define ibmveth_assert(expr) \
  76   if(!(expr)) {                                   \
  77     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
  78     BUG(); \
  79   }
  80 #else
  81 #define ibmveth_debug_printk_no_adapter(fmt, args...)
  82 #define ibmveth_debug_printk(fmt, args...)
  83 #define ibmveth_assert(expr)
  84 #endif
  85
  86 static int ibmveth_open(struct net_device *dev);
  87 static int ibmveth_close(struct net_device *dev);
  88 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  89 static int ibmveth_poll(struct net_device *dev, int *budget);
  90 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
  91 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
  92 static void ibmveth_set_multicast_list(struct net_device *dev);
  93 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
  94 static void ibmveth_proc_register_driver(void);
  95 static void ibmveth_proc_unregister_driver(void);
  96 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
  97 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
  98 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
  99 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
 100
 101 #ifdef CONFIG_PROC_FS
 102 #define IBMVETH_PROC_DIR "net/ibmveth"
 103 static struct proc_dir_entry *ibmveth_proc_dir;
 104 #endif
 105
 106 static const char ibmveth_driver_name[] = "ibmveth";
 107 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 108 #define ibmveth_driver_version "1.03"
 109
 110 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 111 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 112 MODULE_LICENSE("GPL");
 113 MODULE_VERSION(ibmveth_driver_version);
 114
 115 /* simple methods of getting data from the current rxq entry */
 116 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 117 {
 118         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 119 }
 120
 121 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 122 {
 123         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 124 }
 125
 126 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 127 {
 128         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 129 }
 130
 131 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 132 {
 133         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 134 }
 135
 136 /* setup the initial settings for a buffer pool */
 137 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size)
 138 {
 139         pool->size = pool_size;
 140         pool->index = pool_index;
 141         pool->buff_size = buff_size;
 142         pool->threshold = pool_size / 2;
 143 }
 144
 145 /* allocate and setup an buffer pool - called during open */
 146 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 147 {
 148         int i;
 149
 150         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
 151
 152         if(!pool->free_map) {
 153                 return -1;
 154         }
 155
 156         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
 157         if(!pool->dma_addr) {
 158                 kfree(pool->free_map);
 159                 pool->free_map = NULL;
 160                 return -1;
 161         }
 162
 163         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
 164
 165         if(!pool->skbuff) {
 166                 kfree(pool->dma_addr);
 167                 pool->dma_addr = NULL;
 168
 169                 kfree(pool->free_map);
 170                 pool->free_map = NULL;
 171                 return -1;
 172         }
 173
 174         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
 175         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
 176
 177         for(i = 0; i < pool->size; ++i) {
 178                 pool->free_map[i] = i;
 179         }
 180
 181         atomic_set(&pool->available, 0);
 182         pool->producer_index = 0;
 183         pool->consumer_index = 0;
 184         pool->active = 0;
 185
 186         return 0;
 187 }
 188
 189 /* replenish the buffers for a pool.  note that we don't need to
 190  * skb_reserve these since they are used for incoming...
 191  */
 192 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 193 {
 194         u32 i;
 195         u32 count = pool->size - atomic_read(&pool->available);
 196         u32 buffers_added = 0;
 197
 198         mb();
 199
 200         for(i = 0; i < count; ++i) {
 201                 struct sk_buff *skb;
 202                 unsigned int free_index, index;
 203                 u64 correlator;
 204                 union ibmveth_buf_desc desc;
 205                 unsigned long lpar_rc;
 206                 dma_addr_t dma_addr;
 207
 208                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 209
 210                 if(!skb) {
 211                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 212                         adapter->replenish_no_mem++;
 213                         break;
 214                 }
 215
 216                 free_index = pool->consumer_index++ % pool->size;
 217                 index = pool->free_map[free_index];
 218
 219                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
 220                 ibmveth_assert(pool->skbuff[index] == NULL);
 221
 222                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
 223                                 pool->buff_size, DMA_FROM_DEVICE);
 224
 225                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 226                 pool->dma_addr[index] = dma_addr;
 227                 pool->skbuff[index] = skb;
 228
 229                 correlator = ((u64)pool->index << 32) | index;
 230                 *(u64*)skb->data = correlator;
 231
 232                 desc.desc = 0;
 233                 desc.fields.valid = 1;
 234                 desc.fields.length = pool->buff_size;
 235                 desc.fields.address = dma_addr;
 236
 237                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 238
 239                 if(lpar_rc != H_Success) {
 240                         pool->free_map[free_index] = 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         if(pool->free_map) {
 280                 kfree(pool->free_map);
 281                 pool->free_map  = NULL;
 282         }
 283
 284         if(pool->skbuff && pool->dma_addr) {
 285                 for(i = 0; i < pool->size; ++i) {
 286                         struct sk_buff *skb = pool->skbuff[i];
 287                         if(skb) {
 288                                 dma_unmap_single(&adapter->vdev->dev,
 289                                                  pool->dma_addr[i],
 290                                                  pool->buff_size,
 291                                                  DMA_FROM_DEVICE);
 292                                 dev_kfree_skb_any(skb);
 293                                 pool->skbuff[i] = NULL;
 294                         }
 295                 }
 296         }
 297
 298         if(pool->dma_addr) {
 299                 kfree(pool->dma_addr);
 300                 pool->dma_addr = NULL;
 301         }
 302
 303         if(pool->skbuff) {
 304                 kfree(pool->skbuff);
 305                 pool->skbuff = NULL;
 306         }
 307         pool->active = 0;
 308 }
 309
 310 /* remove a buffer from a pool */
 311 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 312 {
 313         unsigned int pool  = correlator >> 32;
 314         unsigned int index = correlator & 0xffffffffUL;
 315         unsigned int free_index;
 316         struct sk_buff *skb;
 317
 318         ibmveth_assert(pool < IbmVethNumBufferPools);
 319         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 320
 321         skb = adapter->rx_buff_pool[pool].skbuff[index];
 322
 323         ibmveth_assert(skb != NULL);
 324
 325         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 326
 327         dma_unmap_single(&adapter->vdev->dev,
 328                          adapter->rx_buff_pool[pool].dma_addr[index],
 329                          adapter->rx_buff_pool[pool].buff_size,
 330                          DMA_FROM_DEVICE);
 331
 332         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 333         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 334
 335         mb();
 336
 337         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 338 }
 339
 340 /* get the current buffer on the rx queue */
 341 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 342 {
 343         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 344         unsigned int pool = correlator >> 32;
 345         unsigned int index = correlator & 0xffffffffUL;
 346
 347         ibmveth_assert(pool < IbmVethNumBufferPools);
 348         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 349
 350         return adapter->rx_buff_pool[pool].skbuff[index];
 351 }
 352
 353 /* recycle the current buffer on the rx queue */
 354 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 355 {
 356         u32 q_index = adapter->rx_queue.index;
 357         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 358         unsigned int pool = correlator >> 32;
 359         unsigned int index = correlator & 0xffffffffUL;
 360         union ibmveth_buf_desc desc;
 361         unsigned long lpar_rc;
 362
 363         ibmveth_assert(pool < IbmVethNumBufferPools);
 364         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 365
 366         if(!adapter->rx_buff_pool[pool].active) {
 367                 ibmveth_rxq_harvest_buffer(adapter);
 368                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 369                 return;
 370         }
 371
 372         desc.desc = 0;
 373         desc.fields.valid = 1;
 374         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 375         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 376
 377         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 378
 379         if(lpar_rc != H_Success) {
 380                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 381                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 382         }
 383
 384         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 385                 adapter->rx_queue.index = 0;
 386                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 387         }
 388 }
 389
 390 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 391 {
 392         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 393
 394         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 395                 adapter->rx_queue.index = 0;
 396                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 397         }
 398 }
 399
 400 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 401 {
 402         int i;
 403
 404         if(adapter->buffer_list_addr != NULL) {
 405                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 406                         dma_unmap_single(&adapter->vdev->dev,
 407                                         adapter->buffer_list_dma, 4096,
 408                                         DMA_BIDIRECTIONAL);
 409                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 410                 }
 411                 free_page((unsigned long)adapter->buffer_list_addr);
 412                 adapter->buffer_list_addr = NULL;
 413         }
 414
 415         if(adapter->filter_list_addr != NULL) {
 416                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 417                         dma_unmap_single(&adapter->vdev->dev,
 418                                         adapter->filter_list_dma, 4096,
 419                                         DMA_BIDIRECTIONAL);
 420                         adapter->filter_list_dma = DMA_ERROR_CODE;
 421                 }
 422                 free_page((unsigned long)adapter->filter_list_addr);
 423                 adapter->filter_list_addr = NULL;
 424         }
 425
 426         if(adapter->rx_queue.queue_addr != NULL) {
 427                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 428                         dma_unmap_single(&adapter->vdev->dev,
 429                                         adapter->rx_queue.queue_dma,
 430                                         adapter->rx_queue.queue_len,
 431                                         DMA_BIDIRECTIONAL);
 432                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 433                 }
 434                 kfree(adapter->rx_queue.queue_addr);
 435                 adapter->rx_queue.queue_addr = NULL;
 436         }
 437
 438         for(i = 0; i<IbmVethNumBufferPools; i++)
 439                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[i]);
 440 }
 441
 442 static int ibmveth_open(struct net_device *netdev)
 443 {
 444         struct ibmveth_adapter *adapter = netdev->priv;
 445         u64 mac_address = 0;
 446         int rxq_entries = 1;
 447         unsigned long lpar_rc;
 448         int rc;
 449         union ibmveth_buf_desc rxq_desc;
 450         int i;
 451
 452         ibmveth_debug_printk("open starting\n");
 453
 454         for(i = 0; i<IbmVethNumBufferPools; i++)
 455                 rxq_entries += adapter->rx_buff_pool[i].size;
 456
 457         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 458         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 459
 460         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 461                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 462                 ibmveth_cleanup(adapter);
 463                 return -ENOMEM;
 464         }
 465
 466         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 467         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 468
 469         if(!adapter->rx_queue.queue_addr) {
 470                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 471                 ibmveth_cleanup(adapter);
 472                 return -ENOMEM;
 473         }
 474
 475         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 476                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 477         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 478                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 479         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 480                         adapter->rx_queue.queue_addr,
 481                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 482
 483         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 484            (dma_mapping_error(adapter->filter_list_dma)) ||
 485            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 486                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 487                 ibmveth_cleanup(adapter);
 488                 return -ENOMEM;
 489         }
 490
 491         adapter->rx_queue.index = 0;
 492         adapter->rx_queue.num_slots = rxq_entries;
 493         adapter->rx_queue.toggle = 1;
 494
 495         /* call change_mtu to init the buffer pools based in initial mtu */
 496         ibmveth_change_mtu(netdev, netdev->mtu);
 497
 498         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 499         mac_address = mac_address >> 16;
 500
 501         rxq_desc.desc = 0;
 502         rxq_desc.fields.valid = 1;
 503         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 504         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 505
 506         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 507         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 508         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 509
 510
 511         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 512                                          adapter->buffer_list_dma,
 513                                          rxq_desc.desc,
 514                                          adapter->filter_list_dma,
 515                                          mac_address);
 516
 517         if(lpar_rc != H_Success) {
 518                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 519                 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
 520                                      adapter->buffer_list_dma,
 521                                      adapter->filter_list_dma,
 522                                      rxq_desc.desc,
 523                                      mac_address);
 524                 ibmveth_cleanup(adapter);
 525                 return -ENONET;
 526         }
 527
 528         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 529         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 530                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 531                 do {
 532                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 533                 } while (H_isLongBusy(rc) || (rc == H_Busy));
 534
 535                 ibmveth_cleanup(adapter);
 536                 return rc;
 537         }
 538
 539         ibmveth_debug_printk("initial replenish cycle\n");
 540         ibmveth_replenish_task(adapter);
 541
 542         netif_start_queue(netdev);
 543
 544         ibmveth_debug_printk("open complete\n");
 545
 546         return 0;
 547 }
 548
 549 static int ibmveth_close(struct net_device *netdev)
 550 {
 551         struct ibmveth_adapter *adapter = netdev->priv;
 552         long lpar_rc;
 553
 554         ibmveth_debug_printk("close starting\n");
 555
 556         netif_stop_queue(netdev);
 557
 558         free_irq(netdev->irq, netdev);
 559
 560         do {
 561                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 562         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
 563
 564         if(lpar_rc != H_Success)
 565         {
 566                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 567                                      lpar_rc);
 568         }
 569
 570         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 571
 572         ibmveth_cleanup(adapter);
 573
 574         ibmveth_debug_printk("close complete\n");
 575
 576         return 0;
 577 }
 578
 579 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 580         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 581         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 582         cmd->speed = SPEED_1000;
 583         cmd->duplex = DUPLEX_FULL;
 584         cmd->port = PORT_FIBRE;
 585         cmd->phy_address = 0;
 586         cmd->transceiver = XCVR_INTERNAL;
 587         cmd->autoneg = AUTONEG_ENABLE;
 588         cmd->maxtxpkt = 0;
 589         cmd->maxrxpkt = 1;
 590         return 0;
 591 }
 592
 593 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 594         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 595         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 596 }
 597
 598 static u32 netdev_get_link(struct net_device *dev) {
 599         return 1;
 600 }
 601
 602 static struct ethtool_ops netdev_ethtool_ops = {
 603         .get_drvinfo            = netdev_get_drvinfo,
 604         .get_settings           = netdev_get_settings,
 605         .get_link               = netdev_get_link,
 606         .get_sg                 = ethtool_op_get_sg,
 607         .get_tx_csum            = ethtool_op_get_tx_csum,
 608 };
 609
 610 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 611 {
 612         return -EOPNOTSUPP;
 613 }
 614
 615 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 616
 617 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 618 {
 619         struct ibmveth_adapter *adapter = netdev->priv;
 620         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 621         unsigned long lpar_rc;
 622         int nfrags = 0, curfrag;
 623         unsigned long correlator;
 624         unsigned long flags;
 625         unsigned int retry_count;
 626         unsigned int tx_dropped = 0;
 627         unsigned int tx_bytes = 0;
 628         unsigned int tx_packets = 0;
 629         unsigned int tx_send_failed = 0;
 630         unsigned int tx_map_failed = 0;
 631
 632
 633         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 634                 tx_dropped++;
 635                 goto out;
 636         }
 637
 638         memset(&desc, 0, sizeof(desc));
 639
 640         /* nfrags = number of frags after the initial fragment */
 641         nfrags = skb_shinfo(skb)->nr_frags;
 642
 643         if(nfrags)
 644                 adapter->tx_multidesc_send++;
 645
 646         /* map the initial fragment */
 647         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 648         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 649                                         desc[0].fields.length, DMA_TO_DEVICE);
 650         desc[0].fields.valid   = 1;
 651
 652         if(dma_mapping_error(desc[0].fields.address)) {
 653                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 654                 tx_map_failed++;
 655                 tx_dropped++;
 656                 goto out;
 657         }
 658
 659         curfrag = nfrags;
 660
 661         /* map fragments past the initial portion if there are any */
 662         while(curfrag--) {
 663                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 664                 desc[curfrag+1].fields.address
 665                         = dma_map_single(&adapter->vdev->dev,
 666                                 page_address(frag->page) + frag->page_offset,
 667                                 frag->size, DMA_TO_DEVICE);
 668                 desc[curfrag+1].fields.length = frag->size;
 669                 desc[curfrag+1].fields.valid  = 1;
 670
 671                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 672                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 673                         tx_map_failed++;
 674                         tx_dropped++;
 675                         /* Free all the mappings we just created */
 676                         while(curfrag < nfrags) {
 677                                 dma_unmap_single(&adapter->vdev->dev,
 678                                                  desc[curfrag+1].fields.address,
 679                                                  desc[curfrag+1].fields.length,
 680                                                  DMA_TO_DEVICE);
 681                                 curfrag++;
 682                         }
 683                         goto out;
 684                 }
 685         }
 686
 687         /* send the frame. Arbitrarily set retrycount to 1024 */
 688         correlator = 0;
 689         retry_count = 1024;
 690         do {
 691                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 692                                              desc[0].desc,
 693                                              desc[1].desc,
 694                                              desc[2].desc,
 695                                              desc[3].desc,
 696                                              desc[4].desc,
 697                                              desc[5].desc,
 698                                              correlator);
 699         } while ((lpar_rc == H_Busy) && (retry_count--));
 700
 701         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
 702                 int i;
 703                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 704                 for(i = 0; i < 6; i++) {
 705                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 706                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 707                 }
 708                 tx_send_failed++;
 709                 tx_dropped++;
 710         } else {
 711                 tx_packets++;
 712                 tx_bytes += skb->len;
 713                 netdev->trans_start = jiffies;
 714         }
 715
 716         do {
 717                 dma_unmap_single(&adapter->vdev->dev,
 718                                 desc[nfrags].fields.address,
 719                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 720         } while(--nfrags >= 0);
 721
 722 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 723         adapter->stats.tx_dropped += tx_dropped;
 724         adapter->stats.tx_bytes += tx_bytes;
 725         adapter->stats.tx_packets += tx_packets;
 726         adapter->tx_send_failed += tx_send_failed;
 727         adapter->tx_map_failed += tx_map_failed;
 728         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 729
 730         dev_kfree_skb(skb);
 731         return 0;
 732 }
 733
 734 static int ibmveth_poll(struct net_device *netdev, int *budget)
 735 {
 736         struct ibmveth_adapter *adapter = netdev->priv;
 737         int max_frames_to_process = netdev->quota;
 738         int frames_processed = 0;
 739         int more_work = 1;
 740         unsigned long lpar_rc;
 741
 742  restart_poll:
 743         do {
 744                 struct net_device *netdev = adapter->netdev;
 745
 746                 if(ibmveth_rxq_pending_buffer(adapter)) {
 747                         struct sk_buff *skb;
 748
 749                         rmb();
 750
 751                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 752                                 wmb(); /* suggested by larson1 */
 753                                 adapter->rx_invalid_buffer++;
 754                                 ibmveth_debug_printk("recycling invalid buffer\n");
 755                                 ibmveth_rxq_recycle_buffer(adapter);
 756                         } else {
 757                                 int length = ibmveth_rxq_frame_length(adapter);
 758                                 int offset = ibmveth_rxq_frame_offset(adapter);
 759                                 skb = ibmveth_rxq_get_buffer(adapter);
 760
 761                                 ibmveth_rxq_harvest_buffer(adapter);
 762
 763                                 skb_reserve(skb, offset);
 764                                 skb_put(skb, length);
 765                                 skb->dev = netdev;
 766                                 skb->protocol = eth_type_trans(skb, netdev);
 767
 768                                 netif_receive_skb(skb); /* send it up */
 769
 770                                 adapter->stats.rx_packets++;
 771                                 adapter->stats.rx_bytes += length;
 772                                 frames_processed++;
 773                                 netdev->last_rx = jiffies;
 774                         }
 775                 } else {
 776                         more_work = 0;
 777                 }
 778         } while(more_work && (frames_processed < max_frames_to_process));
 779
 780         ibmveth_replenish_task(adapter);
 781
 782         if(more_work) {
 783                 /* more work to do - return that we are not done yet */
 784                 netdev->quota -= frames_processed;
 785                 *budget -= frames_processed;
 786                 return 1;
 787         }
 788
 789         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 790         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 791
 792         ibmveth_assert(lpar_rc == H_Success);
 793
 794         netif_rx_complete(netdev);
 795
 796         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 797         {
 798                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 799                 ibmveth_assert(lpar_rc == H_Success);
 800                 more_work = 1;
 801                 goto restart_poll;
 802         }
 803
 804         netdev->quota -= frames_processed;
 805         *budget -= frames_processed;
 806
 807         /* we really are done */
 808         return 0;
 809 }
 810
 811 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 812 {
 813         struct net_device *netdev = dev_instance;
 814         struct ibmveth_adapter *adapter = netdev->priv;
 815         unsigned long lpar_rc;
 816
 817         if(netif_rx_schedule_prep(netdev)) {
 818                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 819                 ibmveth_assert(lpar_rc == H_Success);
 820                 __netif_rx_schedule(netdev);
 821         }
 822         return IRQ_HANDLED;
 823 }
 824
 825 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 826 {
 827         struct ibmveth_adapter *adapter = dev->priv;
 828         return &adapter->stats;
 829 }
 830
 831 static void ibmveth_set_multicast_list(struct net_device *netdev)
 832 {
 833         struct ibmveth_adapter *adapter = netdev->priv;
 834         unsigned long lpar_rc;
 835
 836         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 837                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 838                                            IbmVethMcastEnableRecv |
 839                                            IbmVethMcastDisableFiltering,
 840                                            0);
 841                 if(lpar_rc != H_Success) {
 842                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 843                 }
 844         } else {
 845                 struct dev_mc_list *mclist = netdev->mc_list;
 846                 int i;
 847                 /* clear the filter table & disable filtering */
 848                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 849                                            IbmVethMcastEnableRecv |
 850                                            IbmVethMcastDisableFiltering |
 851                                            IbmVethMcastClearFilterTable,
 852                                            0);
 853                 if(lpar_rc != H_Success) {
 854                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 855                 }
 856                 /* add the addresses to the filter table */
 857                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 858                         // add the multicast address to the filter table
 859                         unsigned long mcast_addr = 0;
 860                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 861                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 862                                                    IbmVethMcastAddFilter,
 863                                                    mcast_addr);
 864                         if(lpar_rc != H_Success) {
 865                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 866                         }
 867                 }
 868
 869                 /* re-enable filtering */
 870                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 871                                            IbmVethMcastEnableFiltering,
 872                                            0);
 873                 if(lpar_rc != H_Success) {
 874                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 875                 }
 876         }
 877 }
 878
 879 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 880 {
 881         struct ibmveth_adapter *adapter = dev->priv;
 882         int i;
 883         int prev_smaller = 1;
 884
 885         if ((new_mtu < 68) ||
 886             (new_mtu > (pool_size[IbmVethNumBufferPools-1]) - IBMVETH_BUFF_OH))
 887                 return -EINVAL;
 888
 889         for(i = 0; i<IbmVethNumBufferPools; i++) {
 890                 int activate = 0;
 891                 if (new_mtu > (pool_size[i]  - IBMVETH_BUFF_OH)) {
 892                         activate = 1;
 893                         prev_smaller= 1;
 894                 } else {
 895                         if (prev_smaller)
 896                                 activate = 1;
 897                         prev_smaller= 0;
 898                 }
 899
 900                 if (activate && !adapter->rx_buff_pool[i].active) {
 901                         struct ibmveth_buff_pool *pool =
 902                                                 &adapter->rx_buff_pool[i];
 903                         if(ibmveth_alloc_buffer_pool(pool)) {
 904                                 ibmveth_error_printk("unable to alloc pool\n");
 905                                 return -ENOMEM;
 906                         }
 907                         adapter->rx_buff_pool[i].active = 1;
 908                 } else if (!activate && adapter->rx_buff_pool[i].active) {
 909                         adapter->rx_buff_pool[i].active = 0;
 910                         h_free_logical_lan_buffer(adapter->vdev->unit_address,
 911                                           (u64)pool_size[i]);
 912                 }
 913
 914         }
 915
 916         /* kick the interrupt handler so that the new buffer pools get
 917            replenished or deallocated */
 918         ibmveth_interrupt(dev->irq, dev, NULL);
 919
 920         dev->mtu = new_mtu;
 921         return 0;
 922 }
 923
 924 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 925 {
 926         int rc, i;
 927         struct net_device *netdev;
 928         struct ibmveth_adapter *adapter = NULL;
 929
 930         unsigned char *mac_addr_p;
 931         unsigned int *mcastFilterSize_p;
 932
 933
 934         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 935                                         dev->unit_address);
 936
 937         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 938         if(!mac_addr_p) {
 939                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 940                                 "attribute\n", __FILE__, __LINE__);
 941                 return 0;
 942         }
 943
 944         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 945         if(!mcastFilterSize_p) {
 946                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 947                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 948                                 __FILE__, __LINE__);
 949                 return 0;
 950         }
 951
 952         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 953
 954         if(!netdev)
 955                 return -ENOMEM;
 956
 957         SET_MODULE_OWNER(netdev);
 958
 959         adapter = netdev->priv;
 960         memset(adapter, 0, sizeof(adapter));
 961         dev->dev.driver_data = netdev;
 962
 963         adapter->vdev = dev;
 964         adapter->netdev = netdev;
 965         adapter->mcastFilterSize= *mcastFilterSize_p;
 966
 967         /*      Some older boxes running PHYP non-natively have an OF that
 968                 returns a 8-byte local-mac-address field (and the first
 969                 2 bytes have to be ignored) while newer boxes' OF return
 970                 a 6-byte field. Note that IEEE 1275 specifies that
 971                 local-mac-address must be a 6-byte field.
 972                 The RPA doc specifies that the first byte must be 10b, so
 973                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 974
 975         if ((*mac_addr_p & 0x3) != 0x02)
 976                 mac_addr_p += 2;
 977
 978         adapter->mac_addr = 0;
 979         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 980
 981         adapter->liobn = dev->iommu_table->it_index;
 982
 983         netdev->irq = dev->irq;
 984         netdev->open               = ibmveth_open;
 985         netdev->poll               = ibmveth_poll;
 986         netdev->weight             = 16;
 987         netdev->stop               = ibmveth_close;
 988         netdev->hard_start_xmit    = ibmveth_start_xmit;
 989         netdev->get_stats          = ibmveth_get_stats;
 990         netdev->set_multicast_list = ibmveth_set_multicast_list;
 991         netdev->do_ioctl           = ibmveth_ioctl;
 992         netdev->ethtool_ops           = &netdev_ethtool_ops;
 993         netdev->change_mtu         = ibmveth_change_mtu;
 994         SET_NETDEV_DEV(netdev, &dev->dev);
 995         netdev->features |= NETIF_F_LLTX;
 996         spin_lock_init(&adapter->stats_lock);
 997
 998         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 999
1000         for(i = 0; i<IbmVethNumBufferPools; i++)
1001                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1002                                          pool_count[i], pool_size[i]);
1003
1004         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1005
1006         adapter->buffer_list_dma = DMA_ERROR_CODE;
1007         adapter->filter_list_dma = DMA_ERROR_CODE;
1008         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1009
1010         ibmveth_debug_printk("registering netdev...\n");
1011
1012         rc = register_netdev(netdev);
1013
1014         if(rc) {
1015                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1016                 free_netdev(netdev);
1017                 return rc;
1018         }
1019
1020         ibmveth_debug_printk("registered\n");
1021
1022         ibmveth_proc_register_adapter(adapter);
1023
1024         return 0;
1025 }
1026
1027 static int __devexit ibmveth_remove(struct vio_dev *dev)
1028 {
1029         struct net_device *netdev = dev->dev.driver_data;
1030         struct ibmveth_adapter *adapter = netdev->priv;
1031
1032         unregister_netdev(netdev);
1033
1034         ibmveth_proc_unregister_adapter(adapter);
1035
1036         free_netdev(netdev);
1037         return 0;
1038 }
1039
1040 #ifdef CONFIG_PROC_FS
1041 static void ibmveth_proc_register_driver(void)
1042 {
1043         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1044         if (ibmveth_proc_dir) {
1045                 SET_MODULE_OWNER(ibmveth_proc_dir);
1046         }
1047 }
1048
1049 static void ibmveth_proc_unregister_driver(void)
1050 {
1051         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1052 }
1053
1054 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1055 {
1056         if (*pos == 0) {
1057                 return (void *)1;
1058         } else {
1059                 return NULL;
1060         }
1061 }
1062
1063 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1064 {
1065         ++*pos;
1066         return NULL;
1067 }
1068
1069 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1070 {
1071 }
1072
1073 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1074 {
1075         struct ibmveth_adapter *adapter = seq->private;
1076         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1077         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1078
1079         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1080
1081         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1082         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1083         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1084                    current_mac[0], current_mac[1], current_mac[2],
1085                    current_mac[3], current_mac[4], current_mac[5]);
1086         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1087                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1088                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1089
1090         seq_printf(seq, "\nAdapter Statistics:\n");
1091         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1092         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1093         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1094         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1095         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1096         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1097         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1098         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1099         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1100         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1101
1102         return 0;
1103 }
1104 static struct seq_operations ibmveth_seq_ops = {
1105         .start = ibmveth_seq_start,
1106         .next  = ibmveth_seq_next,
1107         .stop  = ibmveth_seq_stop,
1108         .show  = ibmveth_seq_show,
1109 };
1110
1111 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1112 {
1113         struct seq_file *seq;
1114         struct proc_dir_entry *proc;
1115         int rc;
1116
1117         rc = seq_open(file, &ibmveth_seq_ops);
1118         if (!rc) {
1119                 /* recover the pointer buried in proc_dir_entry data */
1120                 seq = file->private_data;
1121                 proc = PDE(inode);
1122                 seq->private = proc->data;
1123         }
1124         return rc;
1125 }
1126
1127 static struct file_operations ibmveth_proc_fops = {
1128         .owner   = THIS_MODULE,
1129         .open    = ibmveth_proc_open,
1130         .read    = seq_read,
1131         .llseek  = seq_lseek,
1132         .release = seq_release,
1133 };
1134
1135 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1136 {
1137         struct proc_dir_entry *entry;
1138         if (ibmveth_proc_dir) {
1139                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1140                 if (!entry) {
1141                         ibmveth_error_printk("Cannot create adapter proc entry");
1142                 } else {
1143                         entry->data = (void *) adapter;
1144                         entry->proc_fops = &ibmveth_proc_fops;
1145                         SET_MODULE_OWNER(entry);
1146                 }
1147         }
1148         return;
1149 }
1150
1151 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1152 {
1153         if (ibmveth_proc_dir) {
1154                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1155         }
1156 }
1157
1158 #else /* CONFIG_PROC_FS */
1159 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1160 {
1161 }
1162
1163 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1164 {
1165 }
1166 static void ibmveth_proc_register_driver(void)
1167 {
1168 }
1169
1170 static void ibmveth_proc_unregister_driver(void)
1171 {
1172 }
1173 #endif /* CONFIG_PROC_FS */
1174
1175 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1176         { "network", "IBM,l-lan"},
1177         { "", "" }
1178 };
1179
1180 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1181
1182 static struct vio_driver ibmveth_driver = {
1183         .name        = (char *)ibmveth_driver_name,
1184         .id_table    = ibmveth_device_table,
1185         .probe       = ibmveth_probe,
1186         .remove      = ibmveth_remove
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);