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/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 napi_struct *napi, 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 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 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         napi_enable(&adapter->napi);
 484
 485         for(i = 0; i<IbmVethNumBufferPools; i++)
 486                 rxq_entries += adapter->rx_buff_pool[i].size;
 487
 488         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 489         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 490
 491         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 492                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 493                 ibmveth_cleanup(adapter);
 494                 napi_disable(&adapter->napi);
 495                 return -ENOMEM;
 496         }
 497
 498         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 499         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 500
 501         if(!adapter->rx_queue.queue_addr) {
 502                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 503                 ibmveth_cleanup(adapter);
 504                 napi_disable(&adapter->napi);
 505                 return -ENOMEM;
 506         }
 507
 508         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 509                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 510         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 511                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 512         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 513                         adapter->rx_queue.queue_addr,
 514                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 515
 516         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 517            (dma_mapping_error(adapter->filter_list_dma)) ||
 518            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 519                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 520                 ibmveth_cleanup(adapter);
 521                 napi_disable(&adapter->napi);
 522                 return -ENOMEM;
 523         }
 524
 525         adapter->rx_queue.index = 0;
 526         adapter->rx_queue.num_slots = rxq_entries;
 527         adapter->rx_queue.toggle = 1;
 528
 529         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 530         mac_address = mac_address >> 16;
 531
 532         rxq_desc.desc = 0;
 533         rxq_desc.fields.valid = 1;
 534         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 535         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 536
 537         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 538         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 539         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 540
 541         h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 542
 543         lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
 544
 545         if(lpar_rc != H_SUCCESS) {
 546                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 547                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
 548                                      adapter->buffer_list_dma,
 549                                      adapter->filter_list_dma,
 550                                      rxq_desc.desc,
 551                                      mac_address);
 552                 ibmveth_cleanup(adapter);
 553                 napi_disable(&adapter->napi);
 554                 return -ENONET;
 555         }
 556
 557         for(i = 0; i<IbmVethNumBufferPools; i++) {
 558                 if(!adapter->rx_buff_pool[i].active)
 559                         continue;
 560                 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
 561                         ibmveth_error_printk("unable to alloc pool\n");
 562                         adapter->rx_buff_pool[i].active = 0;
 563                         ibmveth_cleanup(adapter);
 564                         napi_disable(&adapter->napi);
 565                         return -ENOMEM ;
 566                 }
 567         }
 568
 569         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 570         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 571                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 572                 do {
 573                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 574                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 575
 576                 ibmveth_cleanup(adapter);
 577                 napi_disable(&adapter->napi);
 578                 return rc;
 579         }
 580
 581         ibmveth_debug_printk("initial replenish cycle\n");
 582         ibmveth_interrupt(netdev->irq, netdev);
 583
 584         netif_start_queue(netdev);
 585
 586         ibmveth_debug_printk("open complete\n");
 587
 588         return 0;
 589 }
 590
 591 static int ibmveth_close(struct net_device *netdev)
 592 {
 593         struct ibmveth_adapter *adapter = netdev->priv;
 594         long lpar_rc;
 595
 596         ibmveth_debug_printk("close starting\n");
 597
 598         napi_disable(&adapter->napi);
 599
 600         if (!adapter->pool_config)
 601                 netif_stop_queue(netdev);
 602
 603         free_irq(netdev->irq, netdev);
 604
 605         do {
 606                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 607         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
 608
 609         if(lpar_rc != H_SUCCESS)
 610         {
 611                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 612                                      lpar_rc);
 613         }
 614
 615         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 616
 617         ibmveth_cleanup(adapter);
 618
 619         ibmveth_debug_printk("close complete\n");
 620
 621         return 0;
 622 }
 623
 624 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 625         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 626         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 627         cmd->speed = SPEED_1000;
 628         cmd->duplex = DUPLEX_FULL;
 629         cmd->port = PORT_FIBRE;
 630         cmd->phy_address = 0;
 631         cmd->transceiver = XCVR_INTERNAL;
 632         cmd->autoneg = AUTONEG_ENABLE;
 633         cmd->maxtxpkt = 0;
 634         cmd->maxrxpkt = 1;
 635         return 0;
 636 }
 637
 638 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 639         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 640         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 641 }
 642
 643 static u32 netdev_get_link(struct net_device *dev) {
 644         return 1;
 645 }
 646
 647 static const struct ethtool_ops netdev_ethtool_ops = {
 648         .get_drvinfo            = netdev_get_drvinfo,
 649         .get_settings           = netdev_get_settings,
 650         .get_link               = netdev_get_link,
 651         .get_sg                 = ethtool_op_get_sg,
 652         .get_tx_csum            = ethtool_op_get_tx_csum,
 653 };
 654
 655 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 656 {
 657         return -EOPNOTSUPP;
 658 }
 659
 660 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 661
 662 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 663 {
 664         struct ibmveth_adapter *adapter = netdev->priv;
 665         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 666         unsigned long lpar_rc;
 667         int nfrags = 0, curfrag;
 668         unsigned long correlator;
 669         unsigned long flags;
 670         unsigned int retry_count;
 671         unsigned int tx_dropped = 0;
 672         unsigned int tx_bytes = 0;
 673         unsigned int tx_packets = 0;
 674         unsigned int tx_send_failed = 0;
 675         unsigned int tx_map_failed = 0;
 676
 677
 678         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 679                 tx_dropped++;
 680                 goto out;
 681         }
 682
 683         memset(&desc, 0, sizeof(desc));
 684
 685         /* nfrags = number of frags after the initial fragment */
 686         nfrags = skb_shinfo(skb)->nr_frags;
 687
 688         if(nfrags)
 689                 adapter->tx_multidesc_send++;
 690
 691         /* map the initial fragment */
 692         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 693         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 694                                         desc[0].fields.length, DMA_TO_DEVICE);
 695         desc[0].fields.valid   = 1;
 696
 697         if(dma_mapping_error(desc[0].fields.address)) {
 698                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 699                 tx_map_failed++;
 700                 tx_dropped++;
 701                 goto out;
 702         }
 703
 704         curfrag = nfrags;
 705
 706         /* map fragments past the initial portion if there are any */
 707         while(curfrag--) {
 708                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 709                 desc[curfrag+1].fields.address
 710                         = dma_map_single(&adapter->vdev->dev,
 711                                 page_address(frag->page) + frag->page_offset,
 712                                 frag->size, DMA_TO_DEVICE);
 713                 desc[curfrag+1].fields.length = frag->size;
 714                 desc[curfrag+1].fields.valid  = 1;
 715
 716                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 717                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 718                         tx_map_failed++;
 719                         tx_dropped++;
 720                         /* Free all the mappings we just created */
 721                         while(curfrag < nfrags) {
 722                                 dma_unmap_single(&adapter->vdev->dev,
 723                                                  desc[curfrag+1].fields.address,
 724                                                  desc[curfrag+1].fields.length,
 725                                                  DMA_TO_DEVICE);
 726                                 curfrag++;
 727                         }
 728                         goto out;
 729                 }
 730         }
 731
 732         /* send the frame. Arbitrarily set retrycount to 1024 */
 733         correlator = 0;
 734         retry_count = 1024;
 735         do {
 736                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 737                                              desc[0].desc,
 738                                              desc[1].desc,
 739                                              desc[2].desc,
 740                                              desc[3].desc,
 741                                              desc[4].desc,
 742                                              desc[5].desc,
 743                                              correlator,
 744                                              &correlator);
 745         } while ((lpar_rc == H_BUSY) && (retry_count--));
 746
 747         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
 748                 int i;
 749                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 750                 for(i = 0; i < 6; i++) {
 751                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 752                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 753                 }
 754                 tx_send_failed++;
 755                 tx_dropped++;
 756         } else {
 757                 tx_packets++;
 758                 tx_bytes += skb->len;
 759                 netdev->trans_start = jiffies;
 760         }
 761
 762         do {
 763                 dma_unmap_single(&adapter->vdev->dev,
 764                                 desc[nfrags].fields.address,
 765                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 766         } while(--nfrags >= 0);
 767
 768 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 769         adapter->stats.tx_dropped += tx_dropped;
 770         adapter->stats.tx_bytes += tx_bytes;
 771         adapter->stats.tx_packets += tx_packets;
 772         adapter->tx_send_failed += tx_send_failed;
 773         adapter->tx_map_failed += tx_map_failed;
 774         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 775
 776         dev_kfree_skb(skb);
 777         return 0;
 778 }
 779
 780 static int ibmveth_poll(struct napi_struct *napi, int budget)
 781 {
 782         struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
 783         struct net_device *netdev = adapter->netdev;
 784         int frames_processed = 0;
 785         unsigned long lpar_rc;
 786
 787  restart_poll:
 788         do {
 789                 struct sk_buff *skb;
 790
 791                 if (!ibmveth_rxq_pending_buffer(adapter))
 792                         break;
 793
 794                 rmb();
 795                 if (!ibmveth_rxq_buffer_valid(adapter)) {
 796                         wmb(); /* suggested by larson1 */
 797                         adapter->rx_invalid_buffer++;
 798                         ibmveth_debug_printk("recycling invalid buffer\n");
 799                         ibmveth_rxq_recycle_buffer(adapter);
 800                 } else {
 801                         int length = ibmveth_rxq_frame_length(adapter);
 802                         int offset = ibmveth_rxq_frame_offset(adapter);
 803                         skb = ibmveth_rxq_get_buffer(adapter);
 804
 805                         ibmveth_rxq_harvest_buffer(adapter);
 806
 807                         skb_reserve(skb, offset);
 808                         skb_put(skb, length);
 809                         skb->protocol = eth_type_trans(skb, netdev);
 810
 811                         netif_receive_skb(skb); /* send it up */
 812
 813                         adapter->stats.rx_packets++;
 814                         adapter->stats.rx_bytes += length;
 815                         frames_processed++;
 816                         netdev->last_rx = jiffies;
 817                 }
 818         } while (frames_processed < budget);
 819
 820         ibmveth_replenish_task(adapter);
 821
 822         if (frames_processed < budget) {
 823                 /* We think we are done - reenable interrupts,
 824                  * then check once more to make sure we are done.
 825                  */
 826                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
 827                                        VIO_IRQ_ENABLE);
 828
 829                 ibmveth_assert(lpar_rc == H_SUCCESS);
 830
 831                 netif_rx_complete(netdev, napi);
 832
 833                 if (ibmveth_rxq_pending_buffer(adapter) &&
 834                     netif_rx_reschedule(netdev, napi)) {
 835                         lpar_rc = h_vio_signal(adapter->vdev->unit_address,
 836                                                VIO_IRQ_DISABLE);
 837                         goto restart_poll;
 838                 }
 839         }
 840
 841         return frames_processed;
 842 }
 843
 844 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
 845 {
 846         struct net_device *netdev = dev_instance;
 847         struct ibmveth_adapter *adapter = netdev->priv;
 848         unsigned long lpar_rc;
 849
 850         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 851                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
 852                                        VIO_IRQ_DISABLE);
 853                 ibmveth_assert(lpar_rc == H_SUCCESS);
 854                 __netif_rx_schedule(netdev, &adapter->napi);
 855         }
 856         return IRQ_HANDLED;
 857 }
 858
 859 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 860 {
 861         struct ibmveth_adapter *adapter = dev->priv;
 862         return &adapter->stats;
 863 }
 864
 865 static void ibmveth_set_multicast_list(struct net_device *netdev)
 866 {
 867         struct ibmveth_adapter *adapter = netdev->priv;
 868         unsigned long lpar_rc;
 869
 870         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 871                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 872                                            IbmVethMcastEnableRecv |
 873                                            IbmVethMcastDisableFiltering,
 874                                            0);
 875                 if(lpar_rc != H_SUCCESS) {
 876                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 877                 }
 878         } else {
 879                 struct dev_mc_list *mclist = netdev->mc_list;
 880                 int i;
 881                 /* clear the filter table & disable filtering */
 882                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 883                                            IbmVethMcastEnableRecv |
 884                                            IbmVethMcastDisableFiltering |
 885                                            IbmVethMcastClearFilterTable,
 886                                            0);
 887                 if(lpar_rc != H_SUCCESS) {
 888                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 889                 }
 890                 /* add the addresses to the filter table */
 891                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 892                         // add the multicast address to the filter table
 893                         unsigned long mcast_addr = 0;
 894                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 895                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 896                                                    IbmVethMcastAddFilter,
 897                                                    mcast_addr);
 898                         if(lpar_rc != H_SUCCESS) {
 899                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 900                         }
 901                 }
 902
 903                 /* re-enable filtering */
 904                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 905                                            IbmVethMcastEnableFiltering,
 906                                            0);
 907                 if(lpar_rc != H_SUCCESS) {
 908                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 909                 }
 910         }
 911 }
 912
 913 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 914 {
 915         struct ibmveth_adapter *adapter = dev->priv;
 916         int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
 917         int reinit = 0;
 918         int i, rc;
 919
 920         if (new_mtu < IBMVETH_MAX_MTU)
 921                 return -EINVAL;
 922
 923         for (i = 0; i < IbmVethNumBufferPools; i++)
 924                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
 925                         break;
 926
 927         if (i == IbmVethNumBufferPools)
 928                 return -EINVAL;
 929
 930         /* Look for an active buffer pool that can hold the new MTU */
 931         for(i = 0; i<IbmVethNumBufferPools; i++) {
 932                 if (!adapter->rx_buff_pool[i].active) {
 933                         adapter->rx_buff_pool[i].active = 1;
 934                         reinit = 1;
 935                 }
 936
 937                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
 938                         if (reinit && netif_running(adapter->netdev)) {
 939                                 adapter->pool_config = 1;
 940                                 ibmveth_close(adapter->netdev);
 941                                 adapter->pool_config = 0;
 942                                 dev->mtu = new_mtu;
 943                                 if ((rc = ibmveth_open(adapter->netdev)))
 944                                         return rc;
 945                         } else
 946                                 dev->mtu = new_mtu;
 947                         return 0;
 948                 }
 949         }
 950         return -EINVAL;
 951 }
 952
 953 #ifdef CONFIG_NET_POLL_CONTROLLER
 954 static void ibmveth_poll_controller(struct net_device *dev)
 955 {
 956         ibmveth_replenish_task(dev->priv);
 957         ibmveth_interrupt(dev->irq, dev);
 958 }
 959 #endif
 960
 961 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 962 {
 963         int rc, i;
 964         struct net_device *netdev;
 965         struct ibmveth_adapter *adapter;
 966
 967         unsigned char *mac_addr_p;
 968         unsigned int *mcastFilterSize_p;
 969
 970
 971         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 972                                         dev->unit_address);
 973
 974         mac_addr_p = (unsigned char *) vio_get_attribute(dev,
 975                                                 VETH_MAC_ADDR, NULL);
 976         if(!mac_addr_p) {
 977                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 978                                 "attribute\n", __FILE__, __LINE__);
 979                 return 0;
 980         }
 981
 982         mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
 983                                                 VETH_MCAST_FILTER_SIZE, NULL);
 984         if(!mcastFilterSize_p) {
 985                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 986                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 987                                 __FILE__, __LINE__);
 988                 return 0;
 989         }
 990
 991         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 992
 993         if(!netdev)
 994                 return -ENOMEM;
 995
 996         SET_MODULE_OWNER(netdev);
 997
 998         adapter = netdev->priv;
 999         dev->dev.driver_data = netdev;
1000
1001         adapter->vdev = dev;
1002         adapter->netdev = netdev;
1003         adapter->mcastFilterSize= *mcastFilterSize_p;
1004         adapter->pool_config = 0;
1005
1006         netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1007
1008         /*      Some older boxes running PHYP non-natively have an OF that
1009                 returns a 8-byte local-mac-address field (and the first
1010                 2 bytes have to be ignored) while newer boxes' OF return
1011                 a 6-byte field. Note that IEEE 1275 specifies that
1012                 local-mac-address must be a 6-byte field.
1013                 The RPA doc specifies that the first byte must be 10b, so
1014                 we'll just look for it to solve this 8 vs. 6 byte field issue */
1015
1016         if ((*mac_addr_p & 0x3) != 0x02)
1017                 mac_addr_p += 2;
1018
1019         adapter->mac_addr = 0;
1020         memcpy(&adapter->mac_addr, mac_addr_p, 6);
1021
1022         netdev->irq = dev->irq;
1023         netdev->open               = ibmveth_open;
1024         netdev->stop               = ibmveth_close;
1025         netdev->hard_start_xmit    = ibmveth_start_xmit;
1026         netdev->get_stats          = ibmveth_get_stats;
1027         netdev->set_multicast_list = ibmveth_set_multicast_list;
1028         netdev->do_ioctl           = ibmveth_ioctl;
1029         netdev->ethtool_ops           = &netdev_ethtool_ops;
1030         netdev->change_mtu         = ibmveth_change_mtu;
1031         SET_NETDEV_DEV(netdev, &dev->dev);
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033         netdev->poll_controller = ibmveth_poll_controller;
1034 #endif
1035         netdev->features |= NETIF_F_LLTX;
1036         spin_lock_init(&adapter->stats_lock);
1037
1038         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1039
1040         for(i = 0; i<IbmVethNumBufferPools; i++) {
1041                 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1042                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1043                                          pool_count[i], pool_size[i],
1044                                          pool_active[i]);
1045                 kobj->parent = &dev->dev.kobj;
1046                 sprintf(kobj->name, "pool%d", i);
1047                 kobj->ktype = &ktype_veth_pool;
1048                 kobject_register(kobj);
1049         }
1050
1051         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1052
1053         adapter->buffer_list_dma = DMA_ERROR_CODE;
1054         adapter->filter_list_dma = DMA_ERROR_CODE;
1055         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1056
1057         ibmveth_debug_printk("registering netdev...\n");
1058
1059         rc = register_netdev(netdev);
1060
1061         if(rc) {
1062                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1063                 free_netdev(netdev);
1064                 return rc;
1065         }
1066
1067         ibmveth_debug_printk("registered\n");
1068
1069         ibmveth_proc_register_adapter(adapter);
1070
1071         return 0;
1072 }
1073
1074 static int __devexit ibmveth_remove(struct vio_dev *dev)
1075 {
1076         struct net_device *netdev = dev->dev.driver_data;
1077         struct ibmveth_adapter *adapter = netdev->priv;
1078         int i;
1079
1080         for(i = 0; i<IbmVethNumBufferPools; i++)
1081                 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1082
1083         unregister_netdev(netdev);
1084
1085         ibmveth_proc_unregister_adapter(adapter);
1086
1087         free_netdev(netdev);
1088         return 0;
1089 }
1090
1091 #ifdef CONFIG_PROC_FS
1092 static void ibmveth_proc_register_driver(void)
1093 {
1094         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1095         if (ibmveth_proc_dir) {
1096                 SET_MODULE_OWNER(ibmveth_proc_dir);
1097         }
1098 }
1099
1100 static void ibmveth_proc_unregister_driver(void)
1101 {
1102         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1103 }
1104
1105 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1106 {
1107         if (*pos == 0) {
1108                 return (void *)1;
1109         } else {
1110                 return NULL;
1111         }
1112 }
1113
1114 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1115 {
1116         ++*pos;
1117         return NULL;
1118 }
1119
1120 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1121 {
1122 }
1123
1124 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1125 {
1126         struct ibmveth_adapter *adapter = seq->private;
1127         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1128         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1129
1130         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1131
1132         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1133         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1134                    current_mac[0], current_mac[1], current_mac[2],
1135                    current_mac[3], current_mac[4], current_mac[5]);
1136         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1137                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1138                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1139
1140         seq_printf(seq, "\nAdapter Statistics:\n");
1141         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1142         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1143         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1144         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1145         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1146         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1147         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1148         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1149         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1150         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1151
1152         return 0;
1153 }
1154 static struct seq_operations ibmveth_seq_ops = {
1155         .start = ibmveth_seq_start,
1156         .next  = ibmveth_seq_next,
1157         .stop  = ibmveth_seq_stop,
1158         .show  = ibmveth_seq_show,
1159 };
1160
1161 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1162 {
1163         struct seq_file *seq;
1164         struct proc_dir_entry *proc;
1165         int rc;
1166
1167         rc = seq_open(file, &ibmveth_seq_ops);
1168         if (!rc) {
1169                 /* recover the pointer buried in proc_dir_entry data */
1170                 seq = file->private_data;
1171                 proc = PDE(inode);
1172                 seq->private = proc->data;
1173         }
1174         return rc;
1175 }
1176
1177 static const struct file_operations ibmveth_proc_fops = {
1178         .owner   = THIS_MODULE,
1179         .open    = ibmveth_proc_open,
1180         .read    = seq_read,
1181         .llseek  = seq_lseek,
1182         .release = seq_release,
1183 };
1184
1185 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1186 {
1187         struct proc_dir_entry *entry;
1188         if (ibmveth_proc_dir) {
1189                 char u_addr[10];
1190                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1191                 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1192                 if (!entry) {
1193                         ibmveth_error_printk("Cannot create adapter proc entry");
1194                 } else {
1195                         entry->data = (void *) adapter;
1196                         entry->proc_fops = &ibmveth_proc_fops;
1197                         SET_MODULE_OWNER(entry);
1198                 }
1199         }
1200         return;
1201 }
1202
1203 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1204 {
1205         if (ibmveth_proc_dir) {
1206                 char u_addr[10];
1207                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1208                 remove_proc_entry(u_addr, ibmveth_proc_dir);
1209         }
1210 }
1211
1212 #else /* CONFIG_PROC_FS */
1213 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1214 {
1215 }
1216
1217 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1218 {
1219 }
1220 static void ibmveth_proc_register_driver(void)
1221 {
1222 }
1223
1224 static void ibmveth_proc_unregister_driver(void)
1225 {
1226 }
1227 #endif /* CONFIG_PROC_FS */
1228
1229 static struct attribute veth_active_attr;
1230 static struct attribute veth_num_attr;
1231 static struct attribute veth_size_attr;
1232
1233 static ssize_t veth_pool_show(struct kobject * kobj,
1234                               struct attribute * attr, char * buf)
1235 {
1236         struct ibmveth_buff_pool *pool = container_of(kobj,
1237                                                       struct ibmveth_buff_pool,
1238                                                       kobj);
1239
1240         if (attr == &veth_active_attr)
1241                 return sprintf(buf, "%d\n", pool->active);
1242         else if (attr == &veth_num_attr)
1243                 return sprintf(buf, "%d\n", pool->size);
1244         else if (attr == &veth_size_attr)
1245                 return sprintf(buf, "%d\n", pool->buff_size);
1246         return 0;
1247 }
1248
1249 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1250 const char * buf, size_t count)
1251 {
1252         struct ibmveth_buff_pool *pool = container_of(kobj,
1253                                                       struct ibmveth_buff_pool,
1254                                                       kobj);
1255         struct net_device *netdev =
1256             container_of(kobj->parent, struct device, kobj)->driver_data;
1257         struct ibmveth_adapter *adapter = netdev->priv;
1258         long value = simple_strtol(buf, NULL, 10);
1259         long rc;
1260
1261         if (attr == &veth_active_attr) {
1262                 if (value && !pool->active) {
1263                         if (netif_running(netdev)) {
1264                                 if(ibmveth_alloc_buffer_pool(pool)) {
1265                                         ibmveth_error_printk("unable to alloc pool\n");
1266                                         return -ENOMEM;
1267                                 }
1268                                 pool->active = 1;
1269                                 adapter->pool_config = 1;
1270                                 ibmveth_close(netdev);
1271                                 adapter->pool_config = 0;
1272                                 if ((rc = ibmveth_open(netdev)))
1273                                         return rc;
1274                         } else
1275                                 pool->active = 1;
1276                 } else if (!value && pool->active) {
1277                         int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1278                         int i;
1279                         /* Make sure there is a buffer pool with buffers that
1280                            can hold a packet of the size of the MTU */
1281                         for (i = 0; i < IbmVethNumBufferPools; i++) {
1282                                 if (pool == &adapter->rx_buff_pool[i])
1283                                         continue;
1284                                 if (!adapter->rx_buff_pool[i].active)
1285                                         continue;
1286                                 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1287                                         break;
1288                         }
1289
1290                         if (i == IbmVethNumBufferPools) {
1291                                 ibmveth_error_printk("no active pool >= MTU\n");
1292                                 return -EPERM;
1293                         }
1294
1295                         pool->active = 0;
1296                         if (netif_running(netdev)) {
1297                                 adapter->pool_config = 1;
1298                                 ibmveth_close(netdev);
1299                                 adapter->pool_config = 0;
1300                                 if ((rc = ibmveth_open(netdev)))
1301                                         return rc;
1302                         }
1303                 }
1304         } else if (attr == &veth_num_attr) {
1305                 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1306                         return -EINVAL;
1307                 else {
1308                         if (netif_running(netdev)) {
1309                                 adapter->pool_config = 1;
1310                                 ibmveth_close(netdev);
1311                                 adapter->pool_config = 0;
1312                                 pool->size = value;
1313                                 if ((rc = ibmveth_open(netdev)))
1314                                         return rc;
1315                         } else
1316                                 pool->size = value;
1317                 }
1318         } else if (attr == &veth_size_attr) {
1319                 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1320                         return -EINVAL;
1321                 else {
1322                         if (netif_running(netdev)) {
1323                                 adapter->pool_config = 1;
1324                                 ibmveth_close(netdev);
1325                                 adapter->pool_config = 0;
1326                                 pool->buff_size = value;
1327                                 if ((rc = ibmveth_open(netdev)))
1328                                         return rc;
1329                         } else
1330                                 pool->buff_size = value;
1331                 }
1332         }
1333
1334         /* kick the interrupt handler to allocate/deallocate pools */
1335         ibmveth_interrupt(netdev->irq, netdev);
1336         return count;
1337 }
1338
1339
1340 #define ATTR(_name, _mode)      \
1341         struct attribute veth_##_name##_attr = {               \
1342         .name = __stringify(_name), .mode = _mode, \
1343         };
1344
1345 static ATTR(active, 0644);
1346 static ATTR(num, 0644);
1347 static ATTR(size, 0644);
1348
1349 static struct attribute * veth_pool_attrs[] = {
1350         &veth_active_attr,
1351         &veth_num_attr,
1352         &veth_size_attr,
1353         NULL,
1354 };
1355
1356 static struct sysfs_ops veth_pool_ops = {
1357         .show   = veth_pool_show,
1358         .store  = veth_pool_store,
1359 };
1360
1361 static struct kobj_type ktype_veth_pool = {
1362         .release        = NULL,
1363         .sysfs_ops      = &veth_pool_ops,
1364         .default_attrs  = veth_pool_attrs,
1365 };
1366
1367
1368 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1369         { "network", "IBM,l-lan"},
1370         { "", "" }
1371 };
1372 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1373
1374 static struct vio_driver ibmveth_driver = {
1375         .id_table       = ibmveth_device_table,
1376         .probe          = ibmveth_probe,
1377         .remove         = ibmveth_remove,
1378         .driver         = {
1379                 .name   = ibmveth_driver_name,
1380                 .owner  = THIS_MODULE,
1381         }
1382 };
1383
1384 static int __init ibmveth_module_init(void)
1385 {
1386         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1387
1388         ibmveth_proc_register_driver();
1389
1390         return vio_register_driver(&ibmveth_driver);
1391 }
1392
1393 static void __exit ibmveth_module_exit(void)
1394 {
1395         vio_unregister_driver(&ibmveth_driver);
1396         ibmveth_proc_unregister_driver();
1397 }
1398
1399 module_init(ibmveth_module_init);
1400 module_exit(ibmveth_module_exit);