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/module.h>
  37 #include <linux/types.h>
  38 #include <linux/errno.h>
  39 #include <linux/ioport.h>
  40 #include <linux/dma-mapping.h>
  41 #include <linux/kernel.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/etherdevice.h>
  44 #include <linux/skbuff.h>
  45 #include <linux/init.h>
  46 #include <linux/delay.h>
  47 #include <linux/mm.h>
  48 #include <linux/ethtool.h>
  49 #include <linux/proc_fs.h>
  50 #include <asm/semaphore.h>
  51 #include <asm/hvcall.h>
  52 #include <asm/atomic.h>
  53 #include <asm/vio.h>
  54 #include <asm/uaccess.h>
  55 #include <linux/seq_file.h>
  56
  57 #include "ibmveth.h"
  58
  59 #undef DEBUG
  60
  61 #define ibmveth_printk(fmt, args...) \
  62   printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
  63
  64 #define ibmveth_error_printk(fmt, args...) \
  65   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  66
  67 #ifdef DEBUG
  68 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
  69   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
  70 #define ibmveth_debug_printk(fmt, args...) \
  71   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  72 #define ibmveth_assert(expr) \
  73   if(!(expr)) {                                   \
  74     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
  75     BUG(); \
  76   }
  77 #else
  78 #define ibmveth_debug_printk_no_adapter(fmt, args...)
  79 #define ibmveth_debug_printk(fmt, args...)
  80 #define ibmveth_assert(expr)
  81 #endif
  82
  83 static int ibmveth_open(struct net_device *dev);
  84 static int ibmveth_close(struct net_device *dev);
  85 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  86 static int ibmveth_poll(struct net_device *dev, int *budget);
  87 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
  88 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
  89 static void ibmveth_set_multicast_list(struct net_device *dev);
  90 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
  91 static void ibmveth_proc_register_driver(void);
  92 static void ibmveth_proc_unregister_driver(void);
  93 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
  94 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
  95 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
  96 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
  97 static struct kobj_type ktype_veth_pool;
  98
  99 #ifdef CONFIG_PROC_FS
 100 #define IBMVETH_PROC_DIR "net/ibmveth"
 101 static struct proc_dir_entry *ibmveth_proc_dir;
 102 #endif
 103
 104 static const char ibmveth_driver_name[] = "ibmveth";
 105 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 106 #define ibmveth_driver_version "1.03"
 107
 108 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 109 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 110 MODULE_LICENSE("GPL");
 111 MODULE_VERSION(ibmveth_driver_version);
 112
 113 /* simple methods of getting data from the current rxq entry */
 114 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 115 {
 116         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 117 }
 118
 119 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 120 {
 121         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 122 }
 123
 124 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 125 {
 126         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 127 }
 128
 129 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 130 {
 131         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 132 }
 133
 134 /* setup the initial settings for a buffer pool */
 135 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
 136 {
 137         pool->size = pool_size;
 138         pool->index = pool_index;
 139         pool->buff_size = buff_size;
 140         pool->threshold = pool_size / 2;
 141         pool->active = pool_active;
 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
 184         return 0;
 185 }
 186
 187 /* replenish the buffers for a pool.  note that we don't need to
 188  * skb_reserve these since they are used for incoming...
 189  */
 190 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 191 {
 192         u32 i;
 193         u32 count = pool->size - atomic_read(&pool->available);
 194         u32 buffers_added = 0;
 195
 196         mb();
 197
 198         for(i = 0; i < count; ++i) {
 199                 struct sk_buff *skb;
 200                 unsigned int free_index, index;
 201                 u64 correlator;
 202                 union ibmveth_buf_desc desc;
 203                 unsigned long lpar_rc;
 204                 dma_addr_t dma_addr;
 205
 206                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 207
 208                 if(!skb) {
 209                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 210                         adapter->replenish_no_mem++;
 211                         break;
 212                 }
 213
 214                 free_index = pool->consumer_index;
 215                 pool->consumer_index = (pool->consumer_index + 1) % 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                         if (pool->consumer_index == 0)
 242                                 pool->consumer_index = pool->size - 1;
 243                         else
 244                                 pool->consumer_index--;
 245                         dma_unmap_single(&adapter->vdev->dev,
 246                                         pool->dma_addr[index], pool->buff_size,
 247                                         DMA_FROM_DEVICE);
 248                         dev_kfree_skb_any(skb);
 249                         adapter->replenish_add_buff_failure++;
 250                         break;
 251                 } else {
 252                         buffers_added++;
 253                         adapter->replenish_add_buff_success++;
 254                 }
 255         }
 256
 257         mb();
 258         atomic_add(buffers_added, &(pool->available));
 259 }
 260
 261 /* replenish routine */
 262 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 263 {
 264         int i;
 265
 266         adapter->replenish_task_cycles++;
 267
 268         for(i = 0; i < IbmVethNumBufferPools; i++)
 269                 if(adapter->rx_buff_pool[i].active)
 270                         ibmveth_replenish_buffer_pool(adapter,
 271                                                      &adapter->rx_buff_pool[i]);
 272
 273         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 274 }
 275
 276 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 277 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 278 {
 279         int i;
 280
 281         kfree(pool->free_map);
 282         pool->free_map = NULL;
 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 }
 308
 309 /* remove a buffer from a pool */
 310 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 311 {
 312         unsigned int pool  = correlator >> 32;
 313         unsigned int index = correlator & 0xffffffffUL;
 314         unsigned int free_index;
 315         struct sk_buff *skb;
 316
 317         ibmveth_assert(pool < IbmVethNumBufferPools);
 318         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 319
 320         skb = adapter->rx_buff_pool[pool].skbuff[index];
 321
 322         ibmveth_assert(skb != NULL);
 323
 324         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 325
 326         dma_unmap_single(&adapter->vdev->dev,
 327                          adapter->rx_buff_pool[pool].dma_addr[index],
 328                          adapter->rx_buff_pool[pool].buff_size,
 329                          DMA_FROM_DEVICE);
 330
 331         free_index = adapter->rx_buff_pool[pool].producer_index;
 332         adapter->rx_buff_pool[pool].producer_index
 333                 = (adapter->rx_buff_pool[pool].producer_index + 1)
 334                 % adapter->rx_buff_pool[pool].size;
 335         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 336
 337         mb();
 338
 339         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 340 }
 341
 342 /* get the current buffer on the rx queue */
 343 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 344 {
 345         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 346         unsigned int pool = correlator >> 32;
 347         unsigned int index = correlator & 0xffffffffUL;
 348
 349         ibmveth_assert(pool < IbmVethNumBufferPools);
 350         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 351
 352         return adapter->rx_buff_pool[pool].skbuff[index];
 353 }
 354
 355 /* recycle the current buffer on the rx queue */
 356 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 357 {
 358         u32 q_index = adapter->rx_queue.index;
 359         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 360         unsigned int pool = correlator >> 32;
 361         unsigned int index = correlator & 0xffffffffUL;
 362         union ibmveth_buf_desc desc;
 363         unsigned long lpar_rc;
 364
 365         ibmveth_assert(pool < IbmVethNumBufferPools);
 366         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 367
 368         if(!adapter->rx_buff_pool[pool].active) {
 369                 ibmveth_rxq_harvest_buffer(adapter);
 370                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 371                 return;
 372         }
 373
 374         desc.desc = 0;
 375         desc.fields.valid = 1;
 376         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 377         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 378
 379         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 380
 381         if(lpar_rc != H_SUCCESS) {
 382                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 383                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 384         }
 385
 386         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 387                 adapter->rx_queue.index = 0;
 388                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 389         }
 390 }
 391
 392 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 393 {
 394         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 395
 396         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 397                 adapter->rx_queue.index = 0;
 398                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 399         }
 400 }
 401
 402 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 403 {
 404         int i;
 405
 406         if(adapter->buffer_list_addr != NULL) {
 407                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 408                         dma_unmap_single(&adapter->vdev->dev,
 409                                         adapter->buffer_list_dma, 4096,
 410                                         DMA_BIDIRECTIONAL);
 411                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 412                 }
 413                 free_page((unsigned long)adapter->buffer_list_addr);
 414                 adapter->buffer_list_addr = NULL;
 415         }
 416
 417         if(adapter->filter_list_addr != NULL) {
 418                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 419                         dma_unmap_single(&adapter->vdev->dev,
 420                                         adapter->filter_list_dma, 4096,
 421                                         DMA_BIDIRECTIONAL);
 422                         adapter->filter_list_dma = DMA_ERROR_CODE;
 423                 }
 424                 free_page((unsigned long)adapter->filter_list_addr);
 425                 adapter->filter_list_addr = NULL;
 426         }
 427
 428         if(adapter->rx_queue.queue_addr != NULL) {
 429                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 430                         dma_unmap_single(&adapter->vdev->dev,
 431                                         adapter->rx_queue.queue_dma,
 432                                         adapter->rx_queue.queue_len,
 433                                         DMA_BIDIRECTIONAL);
 434                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 435                 }
 436                 kfree(adapter->rx_queue.queue_addr);
 437                 adapter->rx_queue.queue_addr = NULL;
 438         }
 439
 440         for(i = 0; i<IbmVethNumBufferPools; i++)
 441                 if (adapter->rx_buff_pool[i].active)
 442                         ibmveth_free_buffer_pool(adapter,
 443                                                  &adapter->rx_buff_pool[i]);
 444 }
 445
 446 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
 447         union ibmveth_buf_desc rxq_desc, u64 mac_address)
 448 {
 449         int rc, try_again = 1;
 450
 451         /* After a kexec the adapter will still be open, so our attempt to
 452         * open it will fail. So if we get a failure we free the adapter and
 453         * try again, but only once. */
 454 retry:
 455         rc = h_register_logical_lan(adapter->vdev->unit_address,
 456                                     adapter->buffer_list_dma, rxq_desc.desc,
 457                                     adapter->filter_list_dma, mac_address);
 458
 459         if (rc != H_SUCCESS && try_again) {
 460                 do {
 461                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 462                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 463
 464                 try_again = 0;
 465                 goto retry;
 466         }
 467
 468         return rc;
 469 }
 470
 471 static int ibmveth_open(struct net_device *netdev)
 472 {
 473         struct ibmveth_adapter *adapter = netdev->priv;
 474         u64 mac_address = 0;
 475         int rxq_entries = 1;
 476         unsigned long lpar_rc;
 477         int rc;
 478         union ibmveth_buf_desc rxq_desc;
 479         int i;
 480
 481         ibmveth_debug_printk("open starting\n");
 482
 483         for(i = 0; i<IbmVethNumBufferPools; i++)
 484                 rxq_entries += adapter->rx_buff_pool[i].size;
 485
 486         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 487         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 488
 489         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 490                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 491                 ibmveth_cleanup(adapter);
 492                 return -ENOMEM;
 493         }
 494
 495         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 496         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 497
 498         if(!adapter->rx_queue.queue_addr) {
 499                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 500                 ibmveth_cleanup(adapter);
 501                 return -ENOMEM;
 502         }
 503
 504         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 505                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 506         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 507                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 508         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 509                         adapter->rx_queue.queue_addr,
 510                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 511
 512         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 513            (dma_mapping_error(adapter->filter_list_dma)) ||
 514            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 515                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 516                 ibmveth_cleanup(adapter);
 517                 return -ENOMEM;
 518         }
 519
 520         adapter->rx_queue.index = 0;
 521         adapter->rx_queue.num_slots = rxq_entries;
 522         adapter->rx_queue.toggle = 1;
 523
 524         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 525         mac_address = mac_address >> 16;
 526
 527         rxq_desc.desc = 0;
 528         rxq_desc.fields.valid = 1;
 529         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 530         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 531
 532         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 533         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 534         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 535
 536         h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 537
 538         lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
 539
 540         if(lpar_rc != H_SUCCESS) {
 541                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 542                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
 543                                      adapter->buffer_list_dma,
 544                                      adapter->filter_list_dma,
 545                                      rxq_desc.desc,
 546                                      mac_address);
 547                 ibmveth_cleanup(adapter);
 548                 return -ENONET;
 549         }
 550
 551         for(i = 0; i<IbmVethNumBufferPools; i++) {
 552                 if(!adapter->rx_buff_pool[i].active)
 553                         continue;
 554                 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
 555                         ibmveth_error_printk("unable to alloc pool\n");
 556                         adapter->rx_buff_pool[i].active = 0;
 557                         ibmveth_cleanup(adapter);
 558                         return -ENOMEM ;
 559                 }
 560         }
 561
 562         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 563         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 564                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 565                 do {
 566                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 567                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 568
 569                 ibmveth_cleanup(adapter);
 570                 return rc;
 571         }
 572
 573         ibmveth_debug_printk("initial replenish cycle\n");
 574         ibmveth_interrupt(netdev->irq, netdev);
 575
 576         netif_start_queue(netdev);
 577
 578         ibmveth_debug_printk("open complete\n");
 579
 580         return 0;
 581 }
 582
 583 static int ibmveth_close(struct net_device *netdev)
 584 {
 585         struct ibmveth_adapter *adapter = netdev->priv;
 586         long lpar_rc;
 587
 588         ibmveth_debug_printk("close starting\n");
 589
 590         if (!adapter->pool_config)
 591                 netif_stop_queue(netdev);
 592
 593         free_irq(netdev->irq, netdev);
 594
 595         do {
 596                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 597         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
 598
 599         if(lpar_rc != H_SUCCESS)
 600         {
 601                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 602                                      lpar_rc);
 603         }
 604
 605         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 606
 607         ibmveth_cleanup(adapter);
 608
 609         ibmveth_debug_printk("close complete\n");
 610
 611         return 0;
 612 }
 613
 614 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 615         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 616         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 617         cmd->speed = SPEED_1000;
 618         cmd->duplex = DUPLEX_FULL;
 619         cmd->port = PORT_FIBRE;
 620         cmd->phy_address = 0;
 621         cmd->transceiver = XCVR_INTERNAL;
 622         cmd->autoneg = AUTONEG_ENABLE;
 623         cmd->maxtxpkt = 0;
 624         cmd->maxrxpkt = 1;
 625         return 0;
 626 }
 627
 628 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 629         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 630         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 631 }
 632
 633 static u32 netdev_get_link(struct net_device *dev) {
 634         return 1;
 635 }
 636
 637 static const struct ethtool_ops netdev_ethtool_ops = {
 638         .get_drvinfo            = netdev_get_drvinfo,
 639         .get_settings           = netdev_get_settings,
 640         .get_link               = netdev_get_link,
 641         .get_sg                 = ethtool_op_get_sg,
 642         .get_tx_csum            = ethtool_op_get_tx_csum,
 643 };
 644
 645 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 646 {
 647         return -EOPNOTSUPP;
 648 }
 649
 650 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 651
 652 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 653 {
 654         struct ibmveth_adapter *adapter = netdev->priv;
 655         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 656         unsigned long lpar_rc;
 657         int nfrags = 0, curfrag;
 658         unsigned long correlator;
 659         unsigned long flags;
 660         unsigned int retry_count;
 661         unsigned int tx_dropped = 0;
 662         unsigned int tx_bytes = 0;
 663         unsigned int tx_packets = 0;
 664         unsigned int tx_send_failed = 0;
 665         unsigned int tx_map_failed = 0;
 666
 667
 668         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 669                 tx_dropped++;
 670                 goto out;
 671         }
 672
 673         memset(&desc, 0, sizeof(desc));
 674
 675         /* nfrags = number of frags after the initial fragment */
 676         nfrags = skb_shinfo(skb)->nr_frags;
 677
 678         if(nfrags)
 679                 adapter->tx_multidesc_send++;
 680
 681         /* map the initial fragment */
 682         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 683         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 684                                         desc[0].fields.length, DMA_TO_DEVICE);
 685         desc[0].fields.valid   = 1;
 686
 687         if(dma_mapping_error(desc[0].fields.address)) {
 688                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 689                 tx_map_failed++;
 690                 tx_dropped++;
 691                 goto out;
 692         }
 693
 694         curfrag = nfrags;
 695
 696         /* map fragments past the initial portion if there are any */
 697         while(curfrag--) {
 698                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 699                 desc[curfrag+1].fields.address
 700                         = dma_map_single(&adapter->vdev->dev,
 701                                 page_address(frag->page) + frag->page_offset,
 702                                 frag->size, DMA_TO_DEVICE);
 703                 desc[curfrag+1].fields.length = frag->size;
 704                 desc[curfrag+1].fields.valid  = 1;
 705
 706                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 707                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 708                         tx_map_failed++;
 709                         tx_dropped++;
 710                         /* Free all the mappings we just created */
 711                         while(curfrag < nfrags) {
 712                                 dma_unmap_single(&adapter->vdev->dev,
 713                                                  desc[curfrag+1].fields.address,
 714                                                  desc[curfrag+1].fields.length,
 715                                                  DMA_TO_DEVICE);
 716                                 curfrag++;
 717                         }
 718                         goto out;
 719                 }
 720         }
 721
 722         /* send the frame. Arbitrarily set retrycount to 1024 */
 723         correlator = 0;
 724         retry_count = 1024;
 725         do {
 726                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 727                                              desc[0].desc,
 728                                              desc[1].desc,
 729                                              desc[2].desc,
 730                                              desc[3].desc,
 731                                              desc[4].desc,
 732                                              desc[5].desc,
 733                                              correlator,
 734                                              &correlator);
 735         } while ((lpar_rc == H_BUSY) && (retry_count--));
 736
 737         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
 738                 int i;
 739                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 740                 for(i = 0; i < 6; i++) {
 741                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 742                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 743                 }
 744                 tx_send_failed++;
 745                 tx_dropped++;
 746         } else {
 747                 tx_packets++;
 748                 tx_bytes += skb->len;
 749                 netdev->trans_start = jiffies;
 750         }
 751
 752         do {
 753                 dma_unmap_single(&adapter->vdev->dev,
 754                                 desc[nfrags].fields.address,
 755                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 756         } while(--nfrags >= 0);
 757
 758 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 759         adapter->stats.tx_dropped += tx_dropped;
 760         adapter->stats.tx_bytes += tx_bytes;
 761         adapter->stats.tx_packets += tx_packets;
 762         adapter->tx_send_failed += tx_send_failed;
 763         adapter->tx_map_failed += tx_map_failed;
 764         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 765
 766         dev_kfree_skb(skb);
 767         return 0;
 768 }
 769
 770 static int ibmveth_poll(struct net_device *netdev, int *budget)
 771 {
 772         struct ibmveth_adapter *adapter = netdev->priv;
 773         int max_frames_to_process = netdev->quota;
 774         int frames_processed = 0;
 775         int more_work = 1;
 776         unsigned long lpar_rc;
 777
 778  restart_poll:
 779         do {
 780                 struct net_device *netdev = adapter->netdev;
 781
 782                 if(ibmveth_rxq_pending_buffer(adapter)) {
 783                         struct sk_buff *skb;
 784
 785                         rmb();
 786
 787                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 788                                 wmb(); /* suggested by larson1 */
 789                                 adapter->rx_invalid_buffer++;
 790                                 ibmveth_debug_printk("recycling invalid buffer\n");
 791                                 ibmveth_rxq_recycle_buffer(adapter);
 792                         } else {
 793                                 int length = ibmveth_rxq_frame_length(adapter);
 794                                 int offset = ibmveth_rxq_frame_offset(adapter);
 795                                 skb = ibmveth_rxq_get_buffer(adapter);
 796
 797                                 ibmveth_rxq_harvest_buffer(adapter);
 798
 799                                 skb_reserve(skb, offset);
 800                                 skb_put(skb, length);
 801                                 skb->dev = netdev;
 802                                 skb->protocol = eth_type_trans(skb, netdev);
 803
 804                                 netif_receive_skb(skb); /* send it up */
 805
 806                                 adapter->stats.rx_packets++;
 807                                 adapter->stats.rx_bytes += length;
 808                                 frames_processed++;
 809                                 netdev->last_rx = jiffies;
 810                         }
 811                 } else {
 812                         more_work = 0;
 813                 }
 814         } while(more_work && (frames_processed < max_frames_to_process));
 815
 816         ibmveth_replenish_task(adapter);
 817
 818         if(more_work) {
 819                 /* more work to do - return that we are not done yet */
 820                 netdev->quota -= frames_processed;
 821                 *budget -= frames_processed;
 822                 return 1;
 823         }
 824
 825         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 826         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 827
 828         ibmveth_assert(lpar_rc == H_SUCCESS);
 829
 830         netif_rx_complete(netdev);
 831
 832         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 833         {
 834                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 835                 ibmveth_assert(lpar_rc == H_SUCCESS);
 836                 more_work = 1;
 837                 goto restart_poll;
 838         }
 839
 840         netdev->quota -= frames_processed;
 841         *budget -= frames_processed;
 842
 843         /* we really are done */
 844         return 0;
 845 }
 846
 847 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
 848 {
 849         struct net_device *netdev = dev_instance;
 850         struct ibmveth_adapter *adapter = netdev->priv;
 851         unsigned long lpar_rc;
 852
 853         if(netif_rx_schedule_prep(netdev)) {
 854                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 855                 ibmveth_assert(lpar_rc == H_SUCCESS);
 856                 __netif_rx_schedule(netdev);
 857         }
 858         return IRQ_HANDLED;
 859 }
 860
 861 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 862 {
 863         struct ibmveth_adapter *adapter = dev->priv;
 864         return &adapter->stats;
 865 }
 866
 867 static void ibmveth_set_multicast_list(struct net_device *netdev)
 868 {
 869         struct ibmveth_adapter *adapter = netdev->priv;
 870         unsigned long lpar_rc;
 871
 872         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 873                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 874                                            IbmVethMcastEnableRecv |
 875                                            IbmVethMcastDisableFiltering,
 876                                            0);
 877                 if(lpar_rc != H_SUCCESS) {
 878                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 879                 }
 880         } else {
 881                 struct dev_mc_list *mclist = netdev->mc_list;
 882                 int i;
 883                 /* clear the filter table & disable filtering */
 884                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 885                                            IbmVethMcastEnableRecv |
 886                                            IbmVethMcastDisableFiltering |
 887                                            IbmVethMcastClearFilterTable,
 888                                            0);
 889                 if(lpar_rc != H_SUCCESS) {
 890                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 891                 }
 892                 /* add the addresses to the filter table */
 893                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 894                         // add the multicast address to the filter table
 895                         unsigned long mcast_addr = 0;
 896                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 897                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 898                                                    IbmVethMcastAddFilter,
 899                                                    mcast_addr);
 900                         if(lpar_rc != H_SUCCESS) {
 901                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 902                         }
 903                 }
 904
 905                 /* re-enable filtering */
 906                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 907                                            IbmVethMcastEnableFiltering,
 908                                            0);
 909                 if(lpar_rc != H_SUCCESS) {
 910                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 911                 }
 912         }
 913 }
 914
 915 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 916 {
 917         struct ibmveth_adapter *adapter = dev->priv;
 918         int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
 919         int i;
 920
 921         if (new_mtu < IBMVETH_MAX_MTU)
 922                 return -EINVAL;
 923
 924         /* Look for an active buffer pool that can hold the new MTU */
 925         for(i = 0; i<IbmVethNumBufferPools; i++) {
 926                 if (!adapter->rx_buff_pool[i].active)
 927                         continue;
 928                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
 929                         dev->mtu = new_mtu;
 930                         return 0;
 931                 }
 932         }
 933         return -EINVAL;
 934 }
 935
 936 #ifdef CONFIG_NET_POLL_CONTROLLER
 937 static void ibmveth_poll_controller(struct net_device *dev)
 938 {
 939         ibmveth_replenish_task(dev->priv);
 940         ibmveth_interrupt(dev->irq, dev);
 941 }
 942 #endif
 943
 944 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 945 {
 946         int rc, i;
 947         struct net_device *netdev;
 948         struct ibmveth_adapter *adapter = NULL;
 949
 950         unsigned char *mac_addr_p;
 951         unsigned int *mcastFilterSize_p;
 952
 953
 954         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 955                                         dev->unit_address);
 956
 957         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 958         if(!mac_addr_p) {
 959                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 960                                 "attribute\n", __FILE__, __LINE__);
 961                 return 0;
 962         }
 963
 964         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 965         if(!mcastFilterSize_p) {
 966                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 967                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 968                                 __FILE__, __LINE__);
 969                 return 0;
 970         }
 971
 972         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 973
 974         if(!netdev)
 975                 return -ENOMEM;
 976
 977         SET_MODULE_OWNER(netdev);
 978
 979         adapter = netdev->priv;
 980         memset(adapter, 0, sizeof(adapter));
 981         dev->dev.driver_data = netdev;
 982
 983         adapter->vdev = dev;
 984         adapter->netdev = netdev;
 985         adapter->mcastFilterSize= *mcastFilterSize_p;
 986         adapter->pool_config = 0;
 987
 988         /*      Some older boxes running PHYP non-natively have an OF that
 989                 returns a 8-byte local-mac-address field (and the first
 990                 2 bytes have to be ignored) while newer boxes' OF return
 991                 a 6-byte field. Note that IEEE 1275 specifies that
 992                 local-mac-address must be a 6-byte field.
 993                 The RPA doc specifies that the first byte must be 10b, so
 994                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 995
 996         if ((*mac_addr_p & 0x3) != 0x02)
 997                 mac_addr_p += 2;
 998
 999         adapter->mac_addr = 0;
1000         memcpy(&adapter->mac_addr, mac_addr_p, 6);
1001
1002         netdev->irq = dev->irq;
1003         netdev->open               = ibmveth_open;
1004         netdev->poll               = ibmveth_poll;
1005         netdev->weight             = 16;
1006         netdev->stop               = ibmveth_close;
1007         netdev->hard_start_xmit    = ibmveth_start_xmit;
1008         netdev->get_stats          = ibmveth_get_stats;
1009         netdev->set_multicast_list = ibmveth_set_multicast_list;
1010         netdev->do_ioctl           = ibmveth_ioctl;
1011         netdev->ethtool_ops           = &netdev_ethtool_ops;
1012         netdev->change_mtu         = ibmveth_change_mtu;
1013         SET_NETDEV_DEV(netdev, &dev->dev);
1014 #ifdef CONFIG_NET_POLL_CONTROLLER
1015         netdev->poll_controller = ibmveth_poll_controller;
1016 #endif
1017         netdev->features |= NETIF_F_LLTX;
1018         spin_lock_init(&adapter->stats_lock);
1019
1020         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1021
1022         for(i = 0; i<IbmVethNumBufferPools; i++) {
1023                 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1024                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1025                                          pool_count[i], pool_size[i],
1026                                          pool_active[i]);
1027                 kobj->parent = &dev->dev.kobj;
1028                 sprintf(kobj->name, "pool%d", i);
1029                 kobj->ktype = &ktype_veth_pool;
1030                 kobject_register(kobj);
1031         }
1032
1033         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1034
1035         adapter->buffer_list_dma = DMA_ERROR_CODE;
1036         adapter->filter_list_dma = DMA_ERROR_CODE;
1037         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1038
1039         ibmveth_debug_printk("registering netdev...\n");
1040
1041         rc = register_netdev(netdev);
1042
1043         if(rc) {
1044                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1045                 free_netdev(netdev);
1046                 return rc;
1047         }
1048
1049         ibmveth_debug_printk("registered\n");
1050
1051         ibmveth_proc_register_adapter(adapter);
1052
1053         return 0;
1054 }
1055
1056 static int __devexit ibmveth_remove(struct vio_dev *dev)
1057 {
1058         struct net_device *netdev = dev->dev.driver_data;
1059         struct ibmveth_adapter *adapter = netdev->priv;
1060         int i;
1061
1062         for(i = 0; i<IbmVethNumBufferPools; i++)
1063                 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1064
1065         unregister_netdev(netdev);
1066
1067         ibmveth_proc_unregister_adapter(adapter);
1068
1069         free_netdev(netdev);
1070         return 0;
1071 }
1072
1073 #ifdef CONFIG_PROC_FS
1074 static void ibmveth_proc_register_driver(void)
1075 {
1076         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1077         if (ibmveth_proc_dir) {
1078                 SET_MODULE_OWNER(ibmveth_proc_dir);
1079         }
1080 }
1081
1082 static void ibmveth_proc_unregister_driver(void)
1083 {
1084         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1085 }
1086
1087 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1088 {
1089         if (*pos == 0) {
1090                 return (void *)1;
1091         } else {
1092                 return NULL;
1093         }
1094 }
1095
1096 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1097 {
1098         ++*pos;
1099         return NULL;
1100 }
1101
1102 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1103 {
1104 }
1105
1106 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1107 {
1108         struct ibmveth_adapter *adapter = seq->private;
1109         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1110         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1111
1112         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1113
1114         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1115         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1116                    current_mac[0], current_mac[1], current_mac[2],
1117                    current_mac[3], current_mac[4], current_mac[5]);
1118         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1119                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1120                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1121
1122         seq_printf(seq, "\nAdapter Statistics:\n");
1123         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1124         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1125         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1126         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1127         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1128         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1129         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1130         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1131         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1132         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1133
1134         return 0;
1135 }
1136 static struct seq_operations ibmveth_seq_ops = {
1137         .start = ibmveth_seq_start,
1138         .next  = ibmveth_seq_next,
1139         .stop  = ibmveth_seq_stop,
1140         .show  = ibmveth_seq_show,
1141 };
1142
1143 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1144 {
1145         struct seq_file *seq;
1146         struct proc_dir_entry *proc;
1147         int rc;
1148
1149         rc = seq_open(file, &ibmveth_seq_ops);
1150         if (!rc) {
1151                 /* recover the pointer buried in proc_dir_entry data */
1152                 seq = file->private_data;
1153                 proc = PDE(inode);
1154                 seq->private = proc->data;
1155         }
1156         return rc;
1157 }
1158
1159 static struct file_operations ibmveth_proc_fops = {
1160         .owner   = THIS_MODULE,
1161         .open    = ibmveth_proc_open,
1162         .read    = seq_read,
1163         .llseek  = seq_lseek,
1164         .release = seq_release,
1165 };
1166
1167 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1168 {
1169         struct proc_dir_entry *entry;
1170         if (ibmveth_proc_dir) {
1171                 char u_addr[10];
1172                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1173                 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1174                 if (!entry) {
1175                         ibmveth_error_printk("Cannot create adapter proc entry");
1176                 } else {
1177                         entry->data = (void *) adapter;
1178                         entry->proc_fops = &ibmveth_proc_fops;
1179                         SET_MODULE_OWNER(entry);
1180                 }
1181         }
1182         return;
1183 }
1184
1185 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1186 {
1187         if (ibmveth_proc_dir) {
1188                 char u_addr[10];
1189                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1190                 remove_proc_entry(u_addr, ibmveth_proc_dir);
1191         }
1192 }
1193
1194 #else /* CONFIG_PROC_FS */
1195 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1196 {
1197 }
1198
1199 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1200 {
1201 }
1202 static void ibmveth_proc_register_driver(void)
1203 {
1204 }
1205
1206 static void ibmveth_proc_unregister_driver(void)
1207 {
1208 }
1209 #endif /* CONFIG_PROC_FS */
1210
1211 static struct attribute veth_active_attr;
1212 static struct attribute veth_num_attr;
1213 static struct attribute veth_size_attr;
1214
1215 static ssize_t veth_pool_show(struct kobject * kobj,
1216                               struct attribute * attr, char * buf)
1217 {
1218         struct ibmveth_buff_pool *pool = container_of(kobj,
1219                                                       struct ibmveth_buff_pool,
1220                                                       kobj);
1221
1222         if (attr == &veth_active_attr)
1223                 return sprintf(buf, "%d\n", pool->active);
1224         else if (attr == &veth_num_attr)
1225                 return sprintf(buf, "%d\n", pool->size);
1226         else if (attr == &veth_size_attr)
1227                 return sprintf(buf, "%d\n", pool->buff_size);
1228         return 0;
1229 }
1230
1231 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1232 const char * buf, size_t count)
1233 {
1234         struct ibmveth_buff_pool *pool = container_of(kobj,
1235                                                       struct ibmveth_buff_pool,
1236                                                       kobj);
1237         struct net_device *netdev =
1238             container_of(kobj->parent, struct device, kobj)->driver_data;
1239         struct ibmveth_adapter *adapter = netdev->priv;
1240         long value = simple_strtol(buf, NULL, 10);
1241         long rc;
1242
1243         if (attr == &veth_active_attr) {
1244                 if (value && !pool->active) {
1245                         if(ibmveth_alloc_buffer_pool(pool)) {
1246                                 ibmveth_error_printk("unable to alloc pool\n");
1247                                 return -ENOMEM;
1248                         }
1249                         pool->active = 1;
1250                         adapter->pool_config = 1;
1251                         ibmveth_close(netdev);
1252                         adapter->pool_config = 0;
1253                         if ((rc = ibmveth_open(netdev)))
1254                                 return rc;
1255                 } else if (!value && pool->active) {
1256                         int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1257                         int i;
1258                         /* Make sure there is a buffer pool with buffers that
1259                            can hold a packet of the size of the MTU */
1260                         for(i = 0; i<IbmVethNumBufferPools; i++) {
1261                                 if (pool == &adapter->rx_buff_pool[i])
1262                                         continue;
1263                                 if (!adapter->rx_buff_pool[i].active)
1264                                         continue;
1265                                 if (mtu < adapter->rx_buff_pool[i].buff_size) {
1266                                         pool->active = 0;
1267                                         h_free_logical_lan_buffer(adapter->
1268                                                                   vdev->
1269                                                                   unit_address,
1270                                                                   pool->
1271                                                                   buff_size);
1272                                 }
1273                         }
1274                         if (pool->active) {
1275                                 ibmveth_error_printk("no active pool >= MTU\n");
1276                                 return -EPERM;
1277                         }
1278                 }
1279         } else if (attr == &veth_num_attr) {
1280                 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1281                         return -EINVAL;
1282                 else {
1283                         adapter->pool_config = 1;
1284                         ibmveth_close(netdev);
1285                         adapter->pool_config = 0;
1286                         pool->size = value;
1287                         if ((rc = ibmveth_open(netdev)))
1288                                 return rc;
1289                 }
1290         } else if (attr == &veth_size_attr) {
1291                 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1292                         return -EINVAL;
1293                 else {
1294                         adapter->pool_config = 1;
1295                         ibmveth_close(netdev);
1296                         adapter->pool_config = 0;
1297                         pool->buff_size = value;
1298                         if ((rc = ibmveth_open(netdev)))
1299                                 return rc;
1300                 }
1301         }
1302
1303         /* kick the interrupt handler to allocate/deallocate pools */
1304         ibmveth_interrupt(netdev->irq, netdev);
1305         return count;
1306 }
1307
1308
1309 #define ATTR(_name, _mode)      \
1310         struct attribute veth_##_name##_attr = {               \
1311         .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
1312         };
1313
1314 static ATTR(active, 0644);
1315 static ATTR(num, 0644);
1316 static ATTR(size, 0644);
1317
1318 static struct attribute * veth_pool_attrs[] = {
1319         &veth_active_attr,
1320         &veth_num_attr,
1321         &veth_size_attr,
1322         NULL,
1323 };
1324
1325 static struct sysfs_ops veth_pool_ops = {
1326         .show   = veth_pool_show,
1327         .store  = veth_pool_store,
1328 };
1329
1330 static struct kobj_type ktype_veth_pool = {
1331         .release        = NULL,
1332         .sysfs_ops      = &veth_pool_ops,
1333         .default_attrs  = veth_pool_attrs,
1334 };
1335
1336
1337 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1338         { "network", "IBM,l-lan"},
1339         { "", "" }
1340 };
1341 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1342
1343 static struct vio_driver ibmveth_driver = {
1344         .id_table       = ibmveth_device_table,
1345         .probe          = ibmveth_probe,
1346         .remove         = ibmveth_remove,
1347         .driver         = {
1348                 .name   = ibmveth_driver_name,
1349                 .owner  = THIS_MODULE,
1350         }
1351 };
1352
1353 static int __init ibmveth_module_init(void)
1354 {
1355         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1356
1357         ibmveth_proc_register_driver();
1358
1359         return vio_register_driver(&ibmveth_driver);
1360 }
1361
1362 static void __exit ibmveth_module_exit(void)
1363 {
1364         vio_unregister_driver(&ibmveth_driver);
1365         ibmveth_proc_unregister_driver();
1366 }
1367
1368 module_init(ibmveth_module_init);
1369 module_exit(ibmveth_module_exit);