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/types.h>
  39 #include <linux/errno.h>
  40 #include <linux/ioport.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kernel.h>
  43 #include <linux/netdevice.h>
  44 #include <linux/etherdevice.h>
  45 #include <linux/skbuff.h>
  46 #include <linux/init.h>
  47 #include <linux/delay.h>
  48 #include <linux/mm.h>
  49 #include <linux/ethtool.h>
  50 #include <linux/proc_fs.h>
  51 #include <asm/semaphore.h>
  52 #include <asm/hvcall.h>
  53 #include <asm/atomic.h>
  54 #include <asm/iommu.h>
  55 #include <asm/vio.h>
  56 #include <asm/uaccess.h>
  57 #include <linux/seq_file.h>
  58
  59 #include "ibmveth.h"
  60
  61 #undef DEBUG
  62
  63 #define ibmveth_printk(fmt, args...) \
  64   printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
  65
  66 #define ibmveth_error_printk(fmt, args...) \
  67   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  68
  69 #ifdef DEBUG
  70 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
  71   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
  72 #define ibmveth_debug_printk(fmt, args...) \
  73   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  74 #define ibmveth_assert(expr) \
  75   if(!(expr)) {                                   \
  76     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
  77     BUG(); \
  78   }
  79 #else
  80 #define ibmveth_debug_printk_no_adapter(fmt, args...)
  81 #define ibmveth_debug_printk(fmt, args...)
  82 #define ibmveth_assert(expr)
  83 #endif
  84
  85 static int ibmveth_open(struct net_device *dev);
  86 static int ibmveth_close(struct net_device *dev);
  87 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  88 static int ibmveth_poll(struct net_device *dev, int *budget);
  89 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
  90 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
  91 static void ibmveth_set_multicast_list(struct net_device *dev);
  92 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
  93 static void ibmveth_proc_register_driver(void);
  94 static void ibmveth_proc_unregister_driver(void);
  95 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
  96 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
  97 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
  98 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
  99
 100 #ifdef CONFIG_PROC_FS
 101 #define IBMVETH_PROC_DIR "net/ibmveth"
 102 static struct proc_dir_entry *ibmveth_proc_dir;
 103 #endif
 104
 105 static const char ibmveth_driver_name[] = "ibmveth";
 106 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 107 #define ibmveth_driver_version "1.03"
 108
 109 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 110 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 111 MODULE_LICENSE("GPL");
 112 MODULE_VERSION(ibmveth_driver_version);
 113
 114 /* simple methods of getting data from the current rxq entry */
 115 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 116 {
 117         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 118 }
 119
 120 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 121 {
 122         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 123 }
 124
 125 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 126 {
 127         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 128 }
 129
 130 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 131 {
 132         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 133 }
 134
 135 /* setup the initial settings for a buffer pool */
 136 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size)
 137 {
 138         pool->size = pool_size;
 139         pool->index = pool_index;
 140         pool->buff_size = buff_size;
 141         pool->threshold = pool_size / 2;
 142 }
 143
 144 /* allocate and setup an buffer pool - called during open */
 145 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 146 {
 147         int i;
 148
 149         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
 150
 151         if(!pool->free_map) {
 152                 return -1;
 153         }
 154
 155         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
 156         if(!pool->dma_addr) {
 157                 kfree(pool->free_map);
 158                 pool->free_map = NULL;
 159                 return -1;
 160         }
 161
 162         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
 163
 164         if(!pool->skbuff) {
 165                 kfree(pool->dma_addr);
 166                 pool->dma_addr = NULL;
 167
 168                 kfree(pool->free_map);
 169                 pool->free_map = NULL;
 170                 return -1;
 171         }
 172
 173         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
 174         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
 175
 176         for(i = 0; i < pool->size; ++i) {
 177                 pool->free_map[i] = i;
 178         }
 179
 180         atomic_set(&pool->available, 0);
 181         pool->producer_index = 0;
 182         pool->consumer_index = 0;
 183         pool->active = 0;
 184
 185         return 0;
 186 }
 187
 188 /* replenish the buffers for a pool.  note that we don't need to
 189  * skb_reserve these since they are used for incoming...
 190  */
 191 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 192 {
 193         u32 i;
 194         u32 count = pool->size - atomic_read(&pool->available);
 195         u32 buffers_added = 0;
 196
 197         mb();
 198
 199         for(i = 0; i < count; ++i) {
 200                 struct sk_buff *skb;
 201                 unsigned int free_index, index;
 202                 u64 correlator;
 203                 union ibmveth_buf_desc desc;
 204                 unsigned long lpar_rc;
 205                 dma_addr_t dma_addr;
 206
 207                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 208
 209                 if(!skb) {
 210                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 211                         adapter->replenish_no_mem++;
 212                         break;
 213                 }
 214
 215                 free_index = pool->consumer_index++ % pool->size;
 216                 index = pool->free_map[free_index];
 217
 218                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
 219                 ibmveth_assert(pool->skbuff[index] == NULL);
 220
 221                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
 222                                 pool->buff_size, DMA_FROM_DEVICE);
 223
 224                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 225                 pool->dma_addr[index] = dma_addr;
 226                 pool->skbuff[index] = skb;
 227
 228                 correlator = ((u64)pool->index << 32) | index;
 229                 *(u64*)skb->data = correlator;
 230
 231                 desc.desc = 0;
 232                 desc.fields.valid = 1;
 233                 desc.fields.length = pool->buff_size;
 234                 desc.fields.address = dma_addr;
 235
 236                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 237
 238                 if(lpar_rc != H_SUCCESS) {
 239                         pool->free_map[free_index] = index;
 240                         pool->skbuff[index] = NULL;
 241                         pool->consumer_index--;
 242                         dma_unmap_single(&adapter->vdev->dev,
 243                                         pool->dma_addr[index], pool->buff_size,
 244                                         DMA_FROM_DEVICE);
 245                         dev_kfree_skb_any(skb);
 246                         adapter->replenish_add_buff_failure++;
 247                         break;
 248                 } else {
 249                         buffers_added++;
 250                         adapter->replenish_add_buff_success++;
 251                 }
 252         }
 253
 254         mb();
 255         atomic_add(buffers_added, &(pool->available));
 256 }
 257
 258 /* replenish routine */
 259 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 260 {
 261         int i;
 262
 263         adapter->replenish_task_cycles++;
 264
 265         for(i = 0; i < IbmVethNumBufferPools; i++)
 266                 if(adapter->rx_buff_pool[i].active)
 267                         ibmveth_replenish_buffer_pool(adapter,
 268                                                      &adapter->rx_buff_pool[i]);
 269
 270         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 271 }
 272
 273 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 274 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 275 {
 276         int i;
 277
 278         kfree(pool->free_map);
 279         pool->free_map = NULL;
 280
 281         if(pool->skbuff && pool->dma_addr) {
 282                 for(i = 0; i < pool->size; ++i) {
 283                         struct sk_buff *skb = pool->skbuff[i];
 284                         if(skb) {
 285                                 dma_unmap_single(&adapter->vdev->dev,
 286                                                  pool->dma_addr[i],
 287                                                  pool->buff_size,
 288                                                  DMA_FROM_DEVICE);
 289                                 dev_kfree_skb_any(skb);
 290                                 pool->skbuff[i] = NULL;
 291                         }
 292                 }
 293         }
 294
 295         if(pool->dma_addr) {
 296                 kfree(pool->dma_addr);
 297                 pool->dma_addr = NULL;
 298         }
 299
 300         if(pool->skbuff) {
 301                 kfree(pool->skbuff);
 302                 pool->skbuff = NULL;
 303         }
 304         pool->active = 0;
 305 }
 306
 307 /* remove a buffer from a pool */
 308 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 309 {
 310         unsigned int pool  = correlator >> 32;
 311         unsigned int index = correlator & 0xffffffffUL;
 312         unsigned int free_index;
 313         struct sk_buff *skb;
 314
 315         ibmveth_assert(pool < IbmVethNumBufferPools);
 316         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 317
 318         skb = adapter->rx_buff_pool[pool].skbuff[index];
 319
 320         ibmveth_assert(skb != NULL);
 321
 322         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 323
 324         dma_unmap_single(&adapter->vdev->dev,
 325                          adapter->rx_buff_pool[pool].dma_addr[index],
 326                          adapter->rx_buff_pool[pool].buff_size,
 327                          DMA_FROM_DEVICE);
 328
 329         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
 330         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 331
 332         mb();
 333
 334         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 335 }
 336
 337 /* get the current buffer on the rx queue */
 338 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 339 {
 340         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 341         unsigned int pool = correlator >> 32;
 342         unsigned int index = correlator & 0xffffffffUL;
 343
 344         ibmveth_assert(pool < IbmVethNumBufferPools);
 345         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 346
 347         return adapter->rx_buff_pool[pool].skbuff[index];
 348 }
 349
 350 /* recycle the current buffer on the rx queue */
 351 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 352 {
 353         u32 q_index = adapter->rx_queue.index;
 354         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 355         unsigned int pool = correlator >> 32;
 356         unsigned int index = correlator & 0xffffffffUL;
 357         union ibmveth_buf_desc desc;
 358         unsigned long lpar_rc;
 359
 360         ibmveth_assert(pool < IbmVethNumBufferPools);
 361         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 362
 363         if(!adapter->rx_buff_pool[pool].active) {
 364                 ibmveth_rxq_harvest_buffer(adapter);
 365                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 366                 return;
 367         }
 368
 369         desc.desc = 0;
 370         desc.fields.valid = 1;
 371         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 372         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 373
 374         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 375
 376         if(lpar_rc != H_SUCCESS) {
 377                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 378                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 379         }
 380
 381         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 382                 adapter->rx_queue.index = 0;
 383                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 384         }
 385 }
 386
 387 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 388 {
 389         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 390
 391         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 392                 adapter->rx_queue.index = 0;
 393                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 394         }
 395 }
 396
 397 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 398 {
 399         int i;
 400
 401         if(adapter->buffer_list_addr != NULL) {
 402                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 403                         dma_unmap_single(&adapter->vdev->dev,
 404                                         adapter->buffer_list_dma, 4096,
 405                                         DMA_BIDIRECTIONAL);
 406                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 407                 }
 408                 free_page((unsigned long)adapter->buffer_list_addr);
 409                 adapter->buffer_list_addr = NULL;
 410         }
 411
 412         if(adapter->filter_list_addr != NULL) {
 413                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 414                         dma_unmap_single(&adapter->vdev->dev,
 415                                         adapter->filter_list_dma, 4096,
 416                                         DMA_BIDIRECTIONAL);
 417                         adapter->filter_list_dma = DMA_ERROR_CODE;
 418                 }
 419                 free_page((unsigned long)adapter->filter_list_addr);
 420                 adapter->filter_list_addr = NULL;
 421         }
 422
 423         if(adapter->rx_queue.queue_addr != NULL) {
 424                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 425                         dma_unmap_single(&adapter->vdev->dev,
 426                                         adapter->rx_queue.queue_dma,
 427                                         adapter->rx_queue.queue_len,
 428                                         DMA_BIDIRECTIONAL);
 429                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 430                 }
 431                 kfree(adapter->rx_queue.queue_addr);
 432                 adapter->rx_queue.queue_addr = NULL;
 433         }
 434
 435         for(i = 0; i<IbmVethNumBufferPools; i++)
 436                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[i]);
 437 }
 438
 439 static int ibmveth_open(struct net_device *netdev)
 440 {
 441         struct ibmveth_adapter *adapter = netdev->priv;
 442         u64 mac_address = 0;
 443         int rxq_entries = 1;
 444         unsigned long lpar_rc;
 445         int rc;
 446         union ibmveth_buf_desc rxq_desc;
 447         int i;
 448
 449         ibmveth_debug_printk("open starting\n");
 450
 451         for(i = 0; i<IbmVethNumBufferPools; i++)
 452                 rxq_entries += adapter->rx_buff_pool[i].size;
 453
 454         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 455         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 456
 457         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 458                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 459                 ibmveth_cleanup(adapter);
 460                 return -ENOMEM;
 461         }
 462
 463         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 464         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 465
 466         if(!adapter->rx_queue.queue_addr) {
 467                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 468                 ibmveth_cleanup(adapter);
 469                 return -ENOMEM;
 470         }
 471
 472         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 473                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 474         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 475                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 476         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 477                         adapter->rx_queue.queue_addr,
 478                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 479
 480         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 481            (dma_mapping_error(adapter->filter_list_dma)) ||
 482            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 483                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 484                 ibmveth_cleanup(adapter);
 485                 return -ENOMEM;
 486         }
 487
 488         adapter->rx_queue.index = 0;
 489         adapter->rx_queue.num_slots = rxq_entries;
 490         adapter->rx_queue.toggle = 1;
 491
 492         /* call change_mtu to init the buffer pools based in initial mtu */
 493         ibmveth_change_mtu(netdev, netdev->mtu);
 494
 495         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 496         mac_address = mac_address >> 16;
 497
 498         rxq_desc.desc = 0;
 499         rxq_desc.fields.valid = 1;
 500         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 501         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 502
 503         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 504         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 505         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 506
 507
 508         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
 509                                          adapter->buffer_list_dma,
 510                                          rxq_desc.desc,
 511                                          adapter->filter_list_dma,
 512                                          mac_address);
 513
 514         if(lpar_rc != H_SUCCESS) {
 515                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 516                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
 517                                      adapter->buffer_list_dma,
 518                                      adapter->filter_list_dma,
 519                                      rxq_desc.desc,
 520                                      mac_address);
 521                 ibmveth_cleanup(adapter);
 522                 return -ENONET;
 523         }
 524
 525         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 526         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 527                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 528                 do {
 529                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 530                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 531
 532                 ibmveth_cleanup(adapter);
 533                 return rc;
 534         }
 535
 536         ibmveth_debug_printk("initial replenish cycle\n");
 537         ibmveth_interrupt(netdev->irq, netdev, NULL);
 538
 539         netif_start_queue(netdev);
 540
 541         ibmveth_debug_printk("open complete\n");
 542
 543         return 0;
 544 }
 545
 546 static int ibmveth_close(struct net_device *netdev)
 547 {
 548         struct ibmveth_adapter *adapter = netdev->priv;
 549         long lpar_rc;
 550
 551         ibmveth_debug_printk("close starting\n");
 552
 553         netif_stop_queue(netdev);
 554
 555         free_irq(netdev->irq, netdev);
 556
 557         do {
 558                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 559         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
 560
 561         if(lpar_rc != H_SUCCESS)
 562         {
 563                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 564                                      lpar_rc);
 565         }
 566
 567         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 568
 569         ibmveth_cleanup(adapter);
 570
 571         ibmveth_debug_printk("close complete\n");
 572
 573         return 0;
 574 }
 575
 576 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 577         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 578         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 579         cmd->speed = SPEED_1000;
 580         cmd->duplex = DUPLEX_FULL;
 581         cmd->port = PORT_FIBRE;
 582         cmd->phy_address = 0;
 583         cmd->transceiver = XCVR_INTERNAL;
 584         cmd->autoneg = AUTONEG_ENABLE;
 585         cmd->maxtxpkt = 0;
 586         cmd->maxrxpkt = 1;
 587         return 0;
 588 }
 589
 590 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 591         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 592         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 593 }
 594
 595 static u32 netdev_get_link(struct net_device *dev) {
 596         return 1;
 597 }
 598
 599 static struct ethtool_ops netdev_ethtool_ops = {
 600         .get_drvinfo            = netdev_get_drvinfo,
 601         .get_settings           = netdev_get_settings,
 602         .get_link               = netdev_get_link,
 603         .get_sg                 = ethtool_op_get_sg,
 604         .get_tx_csum            = ethtool_op_get_tx_csum,
 605 };
 606
 607 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 608 {
 609         return -EOPNOTSUPP;
 610 }
 611
 612 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 613
 614 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 615 {
 616         struct ibmveth_adapter *adapter = netdev->priv;
 617         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 618         unsigned long lpar_rc;
 619         int nfrags = 0, curfrag;
 620         unsigned long correlator;
 621         unsigned long flags;
 622         unsigned int retry_count;
 623         unsigned int tx_dropped = 0;
 624         unsigned int tx_bytes = 0;
 625         unsigned int tx_packets = 0;
 626         unsigned int tx_send_failed = 0;
 627         unsigned int tx_map_failed = 0;
 628
 629
 630         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 631                 tx_dropped++;
 632                 goto out;
 633         }
 634
 635         memset(&desc, 0, sizeof(desc));
 636
 637         /* nfrags = number of frags after the initial fragment */
 638         nfrags = skb_shinfo(skb)->nr_frags;
 639
 640         if(nfrags)
 641                 adapter->tx_multidesc_send++;
 642
 643         /* map the initial fragment */
 644         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 645         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 646                                         desc[0].fields.length, DMA_TO_DEVICE);
 647         desc[0].fields.valid   = 1;
 648
 649         if(dma_mapping_error(desc[0].fields.address)) {
 650                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 651                 tx_map_failed++;
 652                 tx_dropped++;
 653                 goto out;
 654         }
 655
 656         curfrag = nfrags;
 657
 658         /* map fragments past the initial portion if there are any */
 659         while(curfrag--) {
 660                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 661                 desc[curfrag+1].fields.address
 662                         = dma_map_single(&adapter->vdev->dev,
 663                                 page_address(frag->page) + frag->page_offset,
 664                                 frag->size, DMA_TO_DEVICE);
 665                 desc[curfrag+1].fields.length = frag->size;
 666                 desc[curfrag+1].fields.valid  = 1;
 667
 668                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 669                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 670                         tx_map_failed++;
 671                         tx_dropped++;
 672                         /* Free all the mappings we just created */
 673                         while(curfrag < nfrags) {
 674                                 dma_unmap_single(&adapter->vdev->dev,
 675                                                  desc[curfrag+1].fields.address,
 676                                                  desc[curfrag+1].fields.length,
 677                                                  DMA_TO_DEVICE);
 678                                 curfrag++;
 679                         }
 680                         goto out;
 681                 }
 682         }
 683
 684         /* send the frame. Arbitrarily set retrycount to 1024 */
 685         correlator = 0;
 686         retry_count = 1024;
 687         do {
 688                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 689                                              desc[0].desc,
 690                                              desc[1].desc,
 691                                              desc[2].desc,
 692                                              desc[3].desc,
 693                                              desc[4].desc,
 694                                              desc[5].desc,
 695                                              correlator);
 696         } while ((lpar_rc == H_BUSY) && (retry_count--));
 697
 698         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
 699                 int i;
 700                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 701                 for(i = 0; i < 6; i++) {
 702                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 703                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 704                 }
 705                 tx_send_failed++;
 706                 tx_dropped++;
 707         } else {
 708                 tx_packets++;
 709                 tx_bytes += skb->len;
 710                 netdev->trans_start = jiffies;
 711         }
 712
 713         do {
 714                 dma_unmap_single(&adapter->vdev->dev,
 715                                 desc[nfrags].fields.address,
 716                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 717         } while(--nfrags >= 0);
 718
 719 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 720         adapter->stats.tx_dropped += tx_dropped;
 721         adapter->stats.tx_bytes += tx_bytes;
 722         adapter->stats.tx_packets += tx_packets;
 723         adapter->tx_send_failed += tx_send_failed;
 724         adapter->tx_map_failed += tx_map_failed;
 725         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 726
 727         dev_kfree_skb(skb);
 728         return 0;
 729 }
 730
 731 static int ibmveth_poll(struct net_device *netdev, int *budget)
 732 {
 733         struct ibmveth_adapter *adapter = netdev->priv;
 734         int max_frames_to_process = netdev->quota;
 735         int frames_processed = 0;
 736         int more_work = 1;
 737         unsigned long lpar_rc;
 738
 739  restart_poll:
 740         do {
 741                 struct net_device *netdev = adapter->netdev;
 742
 743                 if(ibmveth_rxq_pending_buffer(adapter)) {
 744                         struct sk_buff *skb;
 745
 746                         rmb();
 747
 748                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 749                                 wmb(); /* suggested by larson1 */
 750                                 adapter->rx_invalid_buffer++;
 751                                 ibmveth_debug_printk("recycling invalid buffer\n");
 752                                 ibmveth_rxq_recycle_buffer(adapter);
 753                         } else {
 754                                 int length = ibmveth_rxq_frame_length(adapter);
 755                                 int offset = ibmveth_rxq_frame_offset(adapter);
 756                                 skb = ibmveth_rxq_get_buffer(adapter);
 757
 758                                 ibmveth_rxq_harvest_buffer(adapter);
 759
 760                                 skb_reserve(skb, offset);
 761                                 skb_put(skb, length);
 762                                 skb->dev = netdev;
 763                                 skb->protocol = eth_type_trans(skb, netdev);
 764
 765                                 netif_receive_skb(skb); /* send it up */
 766
 767                                 adapter->stats.rx_packets++;
 768                                 adapter->stats.rx_bytes += length;
 769                                 frames_processed++;
 770                                 netdev->last_rx = jiffies;
 771                         }
 772                 } else {
 773                         more_work = 0;
 774                 }
 775         } while(more_work && (frames_processed < max_frames_to_process));
 776
 777         ibmveth_replenish_task(adapter);
 778
 779         if(more_work) {
 780                 /* more work to do - return that we are not done yet */
 781                 netdev->quota -= frames_processed;
 782                 *budget -= frames_processed;
 783                 return 1;
 784         }
 785
 786         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 787         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 788
 789         ibmveth_assert(lpar_rc == H_SUCCESS);
 790
 791         netif_rx_complete(netdev);
 792
 793         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 794         {
 795                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 796                 ibmveth_assert(lpar_rc == H_SUCCESS);
 797                 more_work = 1;
 798                 goto restart_poll;
 799         }
 800
 801         netdev->quota -= frames_processed;
 802         *budget -= frames_processed;
 803
 804         /* we really are done */
 805         return 0;
 806 }
 807
 808 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 809 {
 810         struct net_device *netdev = dev_instance;
 811         struct ibmveth_adapter *adapter = netdev->priv;
 812         unsigned long lpar_rc;
 813
 814         if(netif_rx_schedule_prep(netdev)) {
 815                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 816                 ibmveth_assert(lpar_rc == H_SUCCESS);
 817                 __netif_rx_schedule(netdev);
 818         }
 819         return IRQ_HANDLED;
 820 }
 821
 822 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 823 {
 824         struct ibmveth_adapter *adapter = dev->priv;
 825         return &adapter->stats;
 826 }
 827
 828 static void ibmveth_set_multicast_list(struct net_device *netdev)
 829 {
 830         struct ibmveth_adapter *adapter = netdev->priv;
 831         unsigned long lpar_rc;
 832
 833         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 834                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 835                                            IbmVethMcastEnableRecv |
 836                                            IbmVethMcastDisableFiltering,
 837                                            0);
 838                 if(lpar_rc != H_SUCCESS) {
 839                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 840                 }
 841         } else {
 842                 struct dev_mc_list *mclist = netdev->mc_list;
 843                 int i;
 844                 /* clear the filter table & disable filtering */
 845                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 846                                            IbmVethMcastEnableRecv |
 847                                            IbmVethMcastDisableFiltering |
 848                                            IbmVethMcastClearFilterTable,
 849                                            0);
 850                 if(lpar_rc != H_SUCCESS) {
 851                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 852                 }
 853                 /* add the addresses to the filter table */
 854                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 855                         // add the multicast address to the filter table
 856                         unsigned long mcast_addr = 0;
 857                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 858                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 859                                                    IbmVethMcastAddFilter,
 860                                                    mcast_addr);
 861                         if(lpar_rc != H_SUCCESS) {
 862                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 863                         }
 864                 }
 865
 866                 /* re-enable filtering */
 867                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 868                                            IbmVethMcastEnableFiltering,
 869                                            0);
 870                 if(lpar_rc != H_SUCCESS) {
 871                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 872                 }
 873         }
 874 }
 875
 876 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 877 {
 878         struct ibmveth_adapter *adapter = dev->priv;
 879         int i;
 880         int prev_smaller = 1;
 881
 882         if ((new_mtu < 68) ||
 883             (new_mtu > (pool_size[IbmVethNumBufferPools-1]) - IBMVETH_BUFF_OH))
 884                 return -EINVAL;
 885
 886         for(i = 0; i<IbmVethNumBufferPools; i++) {
 887                 int activate = 0;
 888                 if (new_mtu > (pool_size[i]  - IBMVETH_BUFF_OH)) {
 889                         activate = 1;
 890                         prev_smaller= 1;
 891                 } else {
 892                         if (prev_smaller)
 893                                 activate = 1;
 894                         prev_smaller= 0;
 895                 }
 896
 897                 if (activate && !adapter->rx_buff_pool[i].active) {
 898                         struct ibmveth_buff_pool *pool =
 899                                                 &adapter->rx_buff_pool[i];
 900                         if(ibmveth_alloc_buffer_pool(pool)) {
 901                                 ibmveth_error_printk("unable to alloc pool\n");
 902                                 return -ENOMEM;
 903                         }
 904                         adapter->rx_buff_pool[i].active = 1;
 905                 } else if (!activate && adapter->rx_buff_pool[i].active) {
 906                         adapter->rx_buff_pool[i].active = 0;
 907                         h_free_logical_lan_buffer(adapter->vdev->unit_address,
 908                                           (u64)pool_size[i]);
 909                 }
 910
 911         }
 912
 913         /* kick the interrupt handler so that the new buffer pools get
 914            replenished or deallocated */
 915         ibmveth_interrupt(dev->irq, dev, NULL);
 916
 917         dev->mtu = new_mtu;
 918         return 0;
 919 }
 920
 921 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 922 {
 923         int rc, i;
 924         struct net_device *netdev;
 925         struct ibmveth_adapter *adapter = NULL;
 926
 927         unsigned char *mac_addr_p;
 928         unsigned int *mcastFilterSize_p;
 929
 930
 931         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 932                                         dev->unit_address);
 933
 934         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 935         if(!mac_addr_p) {
 936                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 937                                 "attribute\n", __FILE__, __LINE__);
 938                 return 0;
 939         }
 940
 941         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 942         if(!mcastFilterSize_p) {
 943                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 944                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 945                                 __FILE__, __LINE__);
 946                 return 0;
 947         }
 948
 949         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 950
 951         if(!netdev)
 952                 return -ENOMEM;
 953
 954         SET_MODULE_OWNER(netdev);
 955
 956         adapter = netdev->priv;
 957         memset(adapter, 0, sizeof(adapter));
 958         dev->dev.driver_data = netdev;
 959
 960         adapter->vdev = dev;
 961         adapter->netdev = netdev;
 962         adapter->mcastFilterSize= *mcastFilterSize_p;
 963
 964         /*      Some older boxes running PHYP non-natively have an OF that
 965                 returns a 8-byte local-mac-address field (and the first
 966                 2 bytes have to be ignored) while newer boxes' OF return
 967                 a 6-byte field. Note that IEEE 1275 specifies that
 968                 local-mac-address must be a 6-byte field.
 969                 The RPA doc specifies that the first byte must be 10b, so
 970                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 971
 972         if ((*mac_addr_p & 0x3) != 0x02)
 973                 mac_addr_p += 2;
 974
 975         adapter->mac_addr = 0;
 976         memcpy(&adapter->mac_addr, mac_addr_p, 6);
 977
 978         adapter->liobn = dev->iommu_table->it_index;
 979
 980         netdev->irq = dev->irq;
 981         netdev->open               = ibmveth_open;
 982         netdev->poll               = ibmveth_poll;
 983         netdev->weight             = 16;
 984         netdev->stop               = ibmveth_close;
 985         netdev->hard_start_xmit    = ibmveth_start_xmit;
 986         netdev->get_stats          = ibmveth_get_stats;
 987         netdev->set_multicast_list = ibmveth_set_multicast_list;
 988         netdev->do_ioctl           = ibmveth_ioctl;
 989         netdev->ethtool_ops           = &netdev_ethtool_ops;
 990         netdev->change_mtu         = ibmveth_change_mtu;
 991         SET_NETDEV_DEV(netdev, &dev->dev);
 992         netdev->features |= NETIF_F_LLTX;
 993         spin_lock_init(&adapter->stats_lock);
 994
 995         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
 996
 997         for(i = 0; i<IbmVethNumBufferPools; i++)
 998                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
 999                                          pool_count[i], pool_size[i]);
1000
1001         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1002
1003         adapter->buffer_list_dma = DMA_ERROR_CODE;
1004         adapter->filter_list_dma = DMA_ERROR_CODE;
1005         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1006
1007         ibmveth_debug_printk("registering netdev...\n");
1008
1009         rc = register_netdev(netdev);
1010
1011         if(rc) {
1012                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1013                 free_netdev(netdev);
1014                 return rc;
1015         }
1016
1017         ibmveth_debug_printk("registered\n");
1018
1019         ibmveth_proc_register_adapter(adapter);
1020
1021         return 0;
1022 }
1023
1024 static int __devexit ibmveth_remove(struct vio_dev *dev)
1025 {
1026         struct net_device *netdev = dev->dev.driver_data;
1027         struct ibmveth_adapter *adapter = netdev->priv;
1028
1029         unregister_netdev(netdev);
1030
1031         ibmveth_proc_unregister_adapter(adapter);
1032
1033         free_netdev(netdev);
1034         return 0;
1035 }
1036
1037 #ifdef CONFIG_PROC_FS
1038 static void ibmveth_proc_register_driver(void)
1039 {
1040         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1041         if (ibmveth_proc_dir) {
1042                 SET_MODULE_OWNER(ibmveth_proc_dir);
1043         }
1044 }
1045
1046 static void ibmveth_proc_unregister_driver(void)
1047 {
1048         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1049 }
1050
1051 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1052 {
1053         if (*pos == 0) {
1054                 return (void *)1;
1055         } else {
1056                 return NULL;
1057         }
1058 }
1059
1060 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1061 {
1062         ++*pos;
1063         return NULL;
1064 }
1065
1066 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1067 {
1068 }
1069
1070 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1071 {
1072         struct ibmveth_adapter *adapter = seq->private;
1073         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1074         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1075
1076         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1077
1078         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1079         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1080         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1081                    current_mac[0], current_mac[1], current_mac[2],
1082                    current_mac[3], current_mac[4], current_mac[5]);
1083         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1084                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1085                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1086
1087         seq_printf(seq, "\nAdapter Statistics:\n");
1088         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1089         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1090         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1091         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1092         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1093         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1094         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1095         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1096         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1097         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1098
1099         return 0;
1100 }
1101 static struct seq_operations ibmveth_seq_ops = {
1102         .start = ibmveth_seq_start,
1103         .next  = ibmveth_seq_next,
1104         .stop  = ibmveth_seq_stop,
1105         .show  = ibmveth_seq_show,
1106 };
1107
1108 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1109 {
1110         struct seq_file *seq;
1111         struct proc_dir_entry *proc;
1112         int rc;
1113
1114         rc = seq_open(file, &ibmveth_seq_ops);
1115         if (!rc) {
1116                 /* recover the pointer buried in proc_dir_entry data */
1117                 seq = file->private_data;
1118                 proc = PDE(inode);
1119                 seq->private = proc->data;
1120         }
1121         return rc;
1122 }
1123
1124 static struct file_operations ibmveth_proc_fops = {
1125         .owner   = THIS_MODULE,
1126         .open    = ibmveth_proc_open,
1127         .read    = seq_read,
1128         .llseek  = seq_lseek,
1129         .release = seq_release,
1130 };
1131
1132 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1133 {
1134         struct proc_dir_entry *entry;
1135         if (ibmveth_proc_dir) {
1136                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1137                 if (!entry) {
1138                         ibmveth_error_printk("Cannot create adapter proc entry");
1139                 } else {
1140                         entry->data = (void *) adapter;
1141                         entry->proc_fops = &ibmveth_proc_fops;
1142                         SET_MODULE_OWNER(entry);
1143                 }
1144         }
1145         return;
1146 }
1147
1148 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1149 {
1150         if (ibmveth_proc_dir) {
1151                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1152         }
1153 }
1154
1155 #else /* CONFIG_PROC_FS */
1156 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1157 {
1158 }
1159
1160 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1161 {
1162 }
1163 static void ibmveth_proc_register_driver(void)
1164 {
1165 }
1166
1167 static void ibmveth_proc_unregister_driver(void)
1168 {
1169 }
1170 #endif /* CONFIG_PROC_FS */
1171
1172 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1173         { "network", "IBM,l-lan"},
1174         { "", "" }
1175 };
1176 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1177
1178 static struct vio_driver ibmveth_driver = {
1179         .id_table       = ibmveth_device_table,
1180         .probe          = ibmveth_probe,
1181         .remove         = ibmveth_remove,
1182         .driver         = {
1183                 .name   = ibmveth_driver_name,
1184                 .owner  = THIS_MODULE,
1185         }
1186 };
1187
1188 static int __init ibmveth_module_init(void)
1189 {
1190         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1191
1192         ibmveth_proc_register_driver();
1193
1194         return vio_register_driver(&ibmveth_driver);
1195 }
1196
1197 static void __exit ibmveth_module_exit(void)
1198 {
1199         vio_unregister_driver(&ibmveth_driver);
1200         ibmveth_proc_unregister_driver();
1201 }
1202
1203 module_init(ibmveth_module_init);
1204 module_exit(ibmveth_module_exit);