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 <net/net_namespace.h>
  51 #include <asm/semaphore.h>
  52 #include <asm/hvcall.h>
  53 #include <asm/atomic.h>
  54 #include <asm/vio.h>
  55 #include <asm/uaccess.h>
  56 #include <linux/seq_file.h>
  57
  58 #include "ibmveth.h"
  59
  60 #undef DEBUG
  61
  62 #define ibmveth_printk(fmt, args...) \
  63   printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
  64
  65 #define ibmveth_error_printk(fmt, args...) \
  66   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  67
  68 #ifdef DEBUG
  69 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
  70   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
  71 #define ibmveth_debug_printk(fmt, args...) \
  72   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  73 #define ibmveth_assert(expr) \
  74   if(!(expr)) {                                   \
  75     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
  76     BUG(); \
  77   }
  78 #else
  79 #define ibmveth_debug_printk_no_adapter(fmt, args...)
  80 #define ibmveth_debug_printk(fmt, args...)
  81 #define ibmveth_assert(expr)
  82 #endif
  83
  84 static int ibmveth_open(struct net_device *dev);
  85 static int ibmveth_close(struct net_device *dev);
  86 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  87 static int ibmveth_poll(struct napi_struct *napi, int budget);
  88 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
  89 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
  90 static void ibmveth_set_multicast_list(struct net_device *dev);
  91 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
  92 static void ibmveth_proc_register_driver(void);
  93 static void ibmveth_proc_unregister_driver(void);
  94 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
  95 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
  96 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
  97 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
  98 static struct kobj_type ktype_veth_pool;
  99
 100 #ifdef CONFIG_PROC_FS
 101 #define IBMVETH_PROC_DIR "ibmveth"
 102 static struct proc_dir_entry *ibmveth_proc_dir;
 103 #endif
 104
 105 static const char ibmveth_driver_name[] = "ibmveth";
 106 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 107 #define ibmveth_driver_version "1.03"
 108
 109 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 110 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 111 MODULE_LICENSE("GPL");
 112 MODULE_VERSION(ibmveth_driver_version);
 113
 114 /* simple methods of getting data from the current rxq entry */
 115 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 116 {
 117         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 118 }
 119
 120 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 121 {
 122         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 123 }
 124
 125 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 126 {
 127         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 128 }
 129
 130 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 131 {
 132         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 133 }
 134
 135 /* setup the initial settings for a buffer pool */
 136 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
 137 {
 138         pool->size = pool_size;
 139         pool->index = pool_index;
 140         pool->buff_size = buff_size;
 141         pool->threshold = pool_size / 2;
 142         pool->active = pool_active;
 143 }
 144
 145 /* allocate and setup an buffer pool - called during open */
 146 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 147 {
 148         int i;
 149
 150         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
 151
 152         if(!pool->free_map) {
 153                 return -1;
 154         }
 155
 156         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
 157         if(!pool->dma_addr) {
 158                 kfree(pool->free_map);
 159                 pool->free_map = NULL;
 160                 return -1;
 161         }
 162
 163         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
 164
 165         if(!pool->skbuff) {
 166                 kfree(pool->dma_addr);
 167                 pool->dma_addr = NULL;
 168
 169                 kfree(pool->free_map);
 170                 pool->free_map = NULL;
 171                 return -1;
 172         }
 173
 174         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
 175         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
 176
 177         for(i = 0; i < pool->size; ++i) {
 178                 pool->free_map[i] = i;
 179         }
 180
 181         atomic_set(&pool->available, 0);
 182         pool->producer_index = 0;
 183         pool->consumer_index = 0;
 184
 185         return 0;
 186 }
 187
 188 /* replenish the buffers for a pool.  note that we don't need to
 189  * skb_reserve these since they are used for incoming...
 190  */
 191 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 192 {
 193         u32 i;
 194         u32 count = pool->size - atomic_read(&pool->available);
 195         u32 buffers_added = 0;
 196
 197         mb();
 198
 199         for(i = 0; i < count; ++i) {
 200                 struct sk_buff *skb;
 201                 unsigned int free_index, index;
 202                 u64 correlator;
 203                 union ibmveth_buf_desc desc;
 204                 unsigned long lpar_rc;
 205                 dma_addr_t dma_addr;
 206
 207                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 208
 209                 if(!skb) {
 210                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
 211                         adapter->replenish_no_mem++;
 212                         break;
 213                 }
 214
 215                 free_index = pool->consumer_index;
 216                 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
 217                 index = pool->free_map[free_index];
 218
 219                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
 220                 ibmveth_assert(pool->skbuff[index] == NULL);
 221
 222                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
 223                                 pool->buff_size, DMA_FROM_DEVICE);
 224
 225                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
 226                 pool->dma_addr[index] = dma_addr;
 227                 pool->skbuff[index] = skb;
 228
 229                 correlator = ((u64)pool->index << 32) | index;
 230                 *(u64*)skb->data = correlator;
 231
 232                 desc.desc = 0;
 233                 desc.fields.valid = 1;
 234                 desc.fields.length = pool->buff_size;
 235                 desc.fields.address = dma_addr;
 236
 237                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 238
 239                 if(lpar_rc != H_SUCCESS) {
 240                         pool->free_map[free_index] = index;
 241                         pool->skbuff[index] = NULL;
 242                         if (pool->consumer_index == 0)
 243                                 pool->consumer_index = pool->size - 1;
 244                         else
 245                                 pool->consumer_index--;
 246                         dma_unmap_single(&adapter->vdev->dev,
 247                                         pool->dma_addr[index], pool->buff_size,
 248                                         DMA_FROM_DEVICE);
 249                         dev_kfree_skb_any(skb);
 250                         adapter->replenish_add_buff_failure++;
 251                         break;
 252                 } else {
 253                         buffers_added++;
 254                         adapter->replenish_add_buff_success++;
 255                 }
 256         }
 257
 258         mb();
 259         atomic_add(buffers_added, &(pool->available));
 260 }
 261
 262 /* replenish routine */
 263 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
 264 {
 265         int i;
 266
 267         adapter->replenish_task_cycles++;
 268
 269         for(i = 0; i < IbmVethNumBufferPools; i++)
 270                 if(adapter->rx_buff_pool[i].active)
 271                         ibmveth_replenish_buffer_pool(adapter,
 272                                                      &adapter->rx_buff_pool[i]);
 273
 274         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 275 }
 276
 277 /* empty and free ana buffer pool - also used to do cleanup in error paths */
 278 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
 279 {
 280         int i;
 281
 282         kfree(pool->free_map);
 283         pool->free_map = NULL;
 284
 285         if(pool->skbuff && pool->dma_addr) {
 286                 for(i = 0; i < pool->size; ++i) {
 287                         struct sk_buff *skb = pool->skbuff[i];
 288                         if(skb) {
 289                                 dma_unmap_single(&adapter->vdev->dev,
 290                                                  pool->dma_addr[i],
 291                                                  pool->buff_size,
 292                                                  DMA_FROM_DEVICE);
 293                                 dev_kfree_skb_any(skb);
 294                                 pool->skbuff[i] = NULL;
 295                         }
 296                 }
 297         }
 298
 299         if(pool->dma_addr) {
 300                 kfree(pool->dma_addr);
 301                 pool->dma_addr = NULL;
 302         }
 303
 304         if(pool->skbuff) {
 305                 kfree(pool->skbuff);
 306                 pool->skbuff = NULL;
 307         }
 308 }
 309
 310 /* remove a buffer from a pool */
 311 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
 312 {
 313         unsigned int pool  = correlator >> 32;
 314         unsigned int index = correlator & 0xffffffffUL;
 315         unsigned int free_index;
 316         struct sk_buff *skb;
 317
 318         ibmveth_assert(pool < IbmVethNumBufferPools);
 319         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 320
 321         skb = adapter->rx_buff_pool[pool].skbuff[index];
 322
 323         ibmveth_assert(skb != NULL);
 324
 325         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
 326
 327         dma_unmap_single(&adapter->vdev->dev,
 328                          adapter->rx_buff_pool[pool].dma_addr[index],
 329                          adapter->rx_buff_pool[pool].buff_size,
 330                          DMA_FROM_DEVICE);
 331
 332         free_index = adapter->rx_buff_pool[pool].producer_index;
 333         adapter->rx_buff_pool[pool].producer_index
 334                 = (adapter->rx_buff_pool[pool].producer_index + 1)
 335                 % adapter->rx_buff_pool[pool].size;
 336         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 337
 338         mb();
 339
 340         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 341 }
 342
 343 /* get the current buffer on the rx queue */
 344 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 345 {
 346         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 347         unsigned int pool = correlator >> 32;
 348         unsigned int index = correlator & 0xffffffffUL;
 349
 350         ibmveth_assert(pool < IbmVethNumBufferPools);
 351         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 352
 353         return adapter->rx_buff_pool[pool].skbuff[index];
 354 }
 355
 356 /* recycle the current buffer on the rx queue */
 357 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 358 {
 359         u32 q_index = adapter->rx_queue.index;
 360         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 361         unsigned int pool = correlator >> 32;
 362         unsigned int index = correlator & 0xffffffffUL;
 363         union ibmveth_buf_desc desc;
 364         unsigned long lpar_rc;
 365
 366         ibmveth_assert(pool < IbmVethNumBufferPools);
 367         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 368
 369         if(!adapter->rx_buff_pool[pool].active) {
 370                 ibmveth_rxq_harvest_buffer(adapter);
 371                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 372                 return;
 373         }
 374
 375         desc.desc = 0;
 376         desc.fields.valid = 1;
 377         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 378         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 379
 380         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 381
 382         if(lpar_rc != H_SUCCESS) {
 383                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 384                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 385         }
 386
 387         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 388                 adapter->rx_queue.index = 0;
 389                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 390         }
 391 }
 392
 393 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 394 {
 395         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 396
 397         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 398                 adapter->rx_queue.index = 0;
 399                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 400         }
 401 }
 402
 403 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 404 {
 405         int i;
 406
 407         if(adapter->buffer_list_addr != NULL) {
 408                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 409                         dma_unmap_single(&adapter->vdev->dev,
 410                                         adapter->buffer_list_dma, 4096,
 411                                         DMA_BIDIRECTIONAL);
 412                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 413                 }
 414                 free_page((unsigned long)adapter->buffer_list_addr);
 415                 adapter->buffer_list_addr = NULL;
 416         }
 417
 418         if(adapter->filter_list_addr != NULL) {
 419                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 420                         dma_unmap_single(&adapter->vdev->dev,
 421                                         adapter->filter_list_dma, 4096,
 422                                         DMA_BIDIRECTIONAL);
 423                         adapter->filter_list_dma = DMA_ERROR_CODE;
 424                 }
 425                 free_page((unsigned long)adapter->filter_list_addr);
 426                 adapter->filter_list_addr = NULL;
 427         }
 428
 429         if(adapter->rx_queue.queue_addr != NULL) {
 430                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 431                         dma_unmap_single(&adapter->vdev->dev,
 432                                         adapter->rx_queue.queue_dma,
 433                                         adapter->rx_queue.queue_len,
 434                                         DMA_BIDIRECTIONAL);
 435                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 436                 }
 437                 kfree(adapter->rx_queue.queue_addr);
 438                 adapter->rx_queue.queue_addr = NULL;
 439         }
 440
 441         for(i = 0; i<IbmVethNumBufferPools; i++)
 442                 if (adapter->rx_buff_pool[i].active)
 443                         ibmveth_free_buffer_pool(adapter,
 444                                                  &adapter->rx_buff_pool[i]);
 445 }
 446
 447 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
 448         union ibmveth_buf_desc rxq_desc, u64 mac_address)
 449 {
 450         int rc, try_again = 1;
 451
 452         /* After a kexec the adapter will still be open, so our attempt to
 453         * open it will fail. So if we get a failure we free the adapter and
 454         * try again, but only once. */
 455 retry:
 456         rc = h_register_logical_lan(adapter->vdev->unit_address,
 457                                     adapter->buffer_list_dma, rxq_desc.desc,
 458                                     adapter->filter_list_dma, mac_address);
 459
 460         if (rc != H_SUCCESS && try_again) {
 461                 do {
 462                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 463                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 464
 465                 try_again = 0;
 466                 goto retry;
 467         }
 468
 469         return rc;
 470 }
 471
 472 static int ibmveth_open(struct net_device *netdev)
 473 {
 474         struct ibmveth_adapter *adapter = netdev->priv;
 475         u64 mac_address = 0;
 476         int rxq_entries = 1;
 477         unsigned long lpar_rc;
 478         int rc;
 479         union ibmveth_buf_desc rxq_desc;
 480         int i;
 481
 482         ibmveth_debug_printk("open starting\n");
 483
 484         napi_enable(&adapter->napi);
 485
 486         for(i = 0; i<IbmVethNumBufferPools; i++)
 487                 rxq_entries += adapter->rx_buff_pool[i].size;
 488
 489         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 490         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 491
 492         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 493                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 494                 ibmveth_cleanup(adapter);
 495                 napi_disable(&adapter->napi);
 496                 return -ENOMEM;
 497         }
 498
 499         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 500         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 501
 502         if(!adapter->rx_queue.queue_addr) {
 503                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 504                 ibmveth_cleanup(adapter);
 505                 napi_disable(&adapter->napi);
 506                 return -ENOMEM;
 507         }
 508
 509         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 510                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 511         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 512                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 513         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 514                         adapter->rx_queue.queue_addr,
 515                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 516
 517         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 518            (dma_mapping_error(adapter->filter_list_dma)) ||
 519            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 520                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 521                 ibmveth_cleanup(adapter);
 522                 napi_disable(&adapter->napi);
 523                 return -ENOMEM;
 524         }
 525
 526         adapter->rx_queue.index = 0;
 527         adapter->rx_queue.num_slots = rxq_entries;
 528         adapter->rx_queue.toggle = 1;
 529
 530         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 531         mac_address = mac_address >> 16;
 532
 533         rxq_desc.desc = 0;
 534         rxq_desc.fields.valid = 1;
 535         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 536         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 537
 538         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 539         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 540         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 541
 542         h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 543
 544         lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
 545
 546         if(lpar_rc != H_SUCCESS) {
 547                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 548                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
 549                                      adapter->buffer_list_dma,
 550                                      adapter->filter_list_dma,
 551                                      rxq_desc.desc,
 552                                      mac_address);
 553                 ibmveth_cleanup(adapter);
 554                 napi_disable(&adapter->napi);
 555                 return -ENONET;
 556         }
 557
 558         for(i = 0; i<IbmVethNumBufferPools; i++) {
 559                 if(!adapter->rx_buff_pool[i].active)
 560                         continue;
 561                 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
 562                         ibmveth_error_printk("unable to alloc pool\n");
 563                         adapter->rx_buff_pool[i].active = 0;
 564                         ibmveth_cleanup(adapter);
 565                         napi_disable(&adapter->napi);
 566                         return -ENOMEM ;
 567                 }
 568         }
 569
 570         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 571         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 572                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 573                 do {
 574                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 575                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 576
 577                 ibmveth_cleanup(adapter);
 578                 napi_disable(&adapter->napi);
 579                 return rc;
 580         }
 581
 582         ibmveth_debug_printk("initial replenish cycle\n");
 583         ibmveth_interrupt(netdev->irq, netdev);
 584
 585         netif_start_queue(netdev);
 586
 587         ibmveth_debug_printk("open complete\n");
 588
 589         return 0;
 590 }
 591
 592 static int ibmveth_close(struct net_device *netdev)
 593 {
 594         struct ibmveth_adapter *adapter = netdev->priv;
 595         long lpar_rc;
 596
 597         ibmveth_debug_printk("close starting\n");
 598
 599         napi_disable(&adapter->napi);
 600
 601         if (!adapter->pool_config)
 602                 netif_stop_queue(netdev);
 603
 604         free_irq(netdev->irq, netdev);
 605
 606         do {
 607                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 608         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
 609
 610         if(lpar_rc != H_SUCCESS)
 611         {
 612                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 613                                      lpar_rc);
 614         }
 615
 616         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 617
 618         ibmveth_cleanup(adapter);
 619
 620         ibmveth_debug_printk("close complete\n");
 621
 622         return 0;
 623 }
 624
 625 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 626         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 627         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 628         cmd->speed = SPEED_1000;
 629         cmd->duplex = DUPLEX_FULL;
 630         cmd->port = PORT_FIBRE;
 631         cmd->phy_address = 0;
 632         cmd->transceiver = XCVR_INTERNAL;
 633         cmd->autoneg = AUTONEG_ENABLE;
 634         cmd->maxtxpkt = 0;
 635         cmd->maxrxpkt = 1;
 636         return 0;
 637 }
 638
 639 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 640         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 641         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 642 }
 643
 644 static u32 netdev_get_link(struct net_device *dev) {
 645         return 1;
 646 }
 647
 648 static const struct ethtool_ops netdev_ethtool_ops = {
 649         .get_drvinfo            = netdev_get_drvinfo,
 650         .get_settings           = netdev_get_settings,
 651         .get_link               = netdev_get_link,
 652         .get_sg                 = ethtool_op_get_sg,
 653         .get_tx_csum            = ethtool_op_get_tx_csum,
 654 };
 655
 656 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 657 {
 658         return -EOPNOTSUPP;
 659 }
 660
 661 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 662
 663 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 664 {
 665         struct ibmveth_adapter *adapter = netdev->priv;
 666         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 667         unsigned long lpar_rc;
 668         int nfrags = 0, curfrag;
 669         unsigned long correlator;
 670         unsigned long flags;
 671         unsigned int retry_count;
 672         unsigned int tx_dropped = 0;
 673         unsigned int tx_bytes = 0;
 674         unsigned int tx_packets = 0;
 675         unsigned int tx_send_failed = 0;
 676         unsigned int tx_map_failed = 0;
 677
 678
 679         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 680                 tx_dropped++;
 681                 goto out;
 682         }
 683
 684         memset(&desc, 0, sizeof(desc));
 685
 686         /* nfrags = number of frags after the initial fragment */
 687         nfrags = skb_shinfo(skb)->nr_frags;
 688
 689         if(nfrags)
 690                 adapter->tx_multidesc_send++;
 691
 692         /* map the initial fragment */
 693         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 694         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 695                                         desc[0].fields.length, DMA_TO_DEVICE);
 696         desc[0].fields.valid   = 1;
 697
 698         if(dma_mapping_error(desc[0].fields.address)) {
 699                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 700                 tx_map_failed++;
 701                 tx_dropped++;
 702                 goto out;
 703         }
 704
 705         curfrag = nfrags;
 706
 707         /* map fragments past the initial portion if there are any */
 708         while(curfrag--) {
 709                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 710                 desc[curfrag+1].fields.address
 711                         = dma_map_single(&adapter->vdev->dev,
 712                                 page_address(frag->page) + frag->page_offset,
 713                                 frag->size, DMA_TO_DEVICE);
 714                 desc[curfrag+1].fields.length = frag->size;
 715                 desc[curfrag+1].fields.valid  = 1;
 716
 717                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 718                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 719                         tx_map_failed++;
 720                         tx_dropped++;
 721                         /* Free all the mappings we just created */
 722                         while(curfrag < nfrags) {
 723                                 dma_unmap_single(&adapter->vdev->dev,
 724                                                  desc[curfrag+1].fields.address,
 725                                                  desc[curfrag+1].fields.length,
 726                                                  DMA_TO_DEVICE);
 727                                 curfrag++;
 728                         }
 729                         goto out;
 730                 }
 731         }
 732
 733         /* send the frame. Arbitrarily set retrycount to 1024 */
 734         correlator = 0;
 735         retry_count = 1024;
 736         do {
 737                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 738                                              desc[0].desc,
 739                                              desc[1].desc,
 740                                              desc[2].desc,
 741                                              desc[3].desc,
 742                                              desc[4].desc,
 743                                              desc[5].desc,
 744                                              correlator,
 745                                              &correlator);
 746         } while ((lpar_rc == H_BUSY) && (retry_count--));
 747
 748         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
 749                 int i;
 750                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 751                 for(i = 0; i < 6; i++) {
 752                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 753                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 754                 }
 755                 tx_send_failed++;
 756                 tx_dropped++;
 757         } else {
 758                 tx_packets++;
 759                 tx_bytes += skb->len;
 760                 netdev->trans_start = jiffies;
 761         }
 762
 763         do {
 764                 dma_unmap_single(&adapter->vdev->dev,
 765                                 desc[nfrags].fields.address,
 766                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 767         } while(--nfrags >= 0);
 768
 769 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 770         adapter->stats.tx_dropped += tx_dropped;
 771         adapter->stats.tx_bytes += tx_bytes;
 772         adapter->stats.tx_packets += tx_packets;
 773         adapter->tx_send_failed += tx_send_failed;
 774         adapter->tx_map_failed += tx_map_failed;
 775         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 776
 777         dev_kfree_skb(skb);
 778         return 0;
 779 }
 780
 781 static int ibmveth_poll(struct napi_struct *napi, int budget)
 782 {
 783         struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
 784         struct net_device *netdev = adapter->netdev;
 785         int frames_processed = 0;
 786         unsigned long lpar_rc;
 787
 788  restart_poll:
 789         do {
 790                 struct sk_buff *skb;
 791
 792                 if (!ibmveth_rxq_pending_buffer(adapter))
 793                         break;
 794
 795                 rmb();
 796                 if (!ibmveth_rxq_buffer_valid(adapter)) {
 797                         wmb(); /* suggested by larson1 */
 798                         adapter->rx_invalid_buffer++;
 799                         ibmveth_debug_printk("recycling invalid buffer\n");
 800                         ibmveth_rxq_recycle_buffer(adapter);
 801                 } else {
 802                         int length = ibmveth_rxq_frame_length(adapter);
 803                         int offset = ibmveth_rxq_frame_offset(adapter);
 804                         skb = ibmveth_rxq_get_buffer(adapter);
 805
 806                         ibmveth_rxq_harvest_buffer(adapter);
 807
 808                         skb_reserve(skb, offset);
 809                         skb_put(skb, length);
 810                         skb->protocol = eth_type_trans(skb, netdev);
 811
 812                         netif_receive_skb(skb); /* send it up */
 813
 814                         adapter->stats.rx_packets++;
 815                         adapter->stats.rx_bytes += length;
 816                         frames_processed++;
 817                         netdev->last_rx = jiffies;
 818                 }
 819         } while (frames_processed < budget);
 820
 821         ibmveth_replenish_task(adapter);
 822
 823         if (frames_processed < budget) {
 824                 /* We think we are done - reenable interrupts,
 825                  * then check once more to make sure we are done.
 826                  */
 827                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
 828                                        VIO_IRQ_ENABLE);
 829
 830                 ibmveth_assert(lpar_rc == H_SUCCESS);
 831
 832                 netif_rx_complete(netdev, napi);
 833
 834                 if (ibmveth_rxq_pending_buffer(adapter) &&
 835                     netif_rx_reschedule(netdev, napi)) {
 836                         lpar_rc = h_vio_signal(adapter->vdev->unit_address,
 837                                                VIO_IRQ_DISABLE);
 838                         goto restart_poll;
 839                 }
 840         }
 841
 842         return frames_processed;
 843 }
 844
 845 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
 846 {
 847         struct net_device *netdev = dev_instance;
 848         struct ibmveth_adapter *adapter = netdev->priv;
 849         unsigned long lpar_rc;
 850
 851         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 852                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
 853                                        VIO_IRQ_DISABLE);
 854                 ibmveth_assert(lpar_rc == H_SUCCESS);
 855                 __netif_rx_schedule(netdev, &adapter->napi);
 856         }
 857         return IRQ_HANDLED;
 858 }
 859
 860 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
 861 {
 862         struct ibmveth_adapter *adapter = dev->priv;
 863         return &adapter->stats;
 864 }
 865
 866 static void ibmveth_set_multicast_list(struct net_device *netdev)
 867 {
 868         struct ibmveth_adapter *adapter = netdev->priv;
 869         unsigned long lpar_rc;
 870
 871         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
 872                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 873                                            IbmVethMcastEnableRecv |
 874                                            IbmVethMcastDisableFiltering,
 875                                            0);
 876                 if(lpar_rc != H_SUCCESS) {
 877                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
 878                 }
 879         } else {
 880                 struct dev_mc_list *mclist = netdev->mc_list;
 881                 int i;
 882                 /* clear the filter table & disable filtering */
 883                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 884                                            IbmVethMcastEnableRecv |
 885                                            IbmVethMcastDisableFiltering |
 886                                            IbmVethMcastClearFilterTable,
 887                                            0);
 888                 if(lpar_rc != H_SUCCESS) {
 889                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
 890                 }
 891                 /* add the addresses to the filter table */
 892                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
 893                         // add the multicast address to the filter table
 894                         unsigned long mcast_addr = 0;
 895                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
 896                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 897                                                    IbmVethMcastAddFilter,
 898                                                    mcast_addr);
 899                         if(lpar_rc != H_SUCCESS) {
 900                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
 901                         }
 902                 }
 903
 904                 /* re-enable filtering */
 905                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
 906                                            IbmVethMcastEnableFiltering,
 907                                            0);
 908                 if(lpar_rc != H_SUCCESS) {
 909                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
 910                 }
 911         }
 912 }
 913
 914 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
 915 {
 916         struct ibmveth_adapter *adapter = dev->priv;
 917         int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
 918         int reinit = 0;
 919         int i, rc;
 920
 921         if (new_mtu < IBMVETH_MAX_MTU)
 922                 return -EINVAL;
 923
 924         for (i = 0; i < IbmVethNumBufferPools; i++)
 925                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
 926                         break;
 927
 928         if (i == IbmVethNumBufferPools)
 929                 return -EINVAL;
 930
 931         /* Look for an active buffer pool that can hold the new MTU */
 932         for(i = 0; i<IbmVethNumBufferPools; i++) {
 933                 if (!adapter->rx_buff_pool[i].active) {
 934                         adapter->rx_buff_pool[i].active = 1;
 935                         reinit = 1;
 936                 }
 937
 938                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
 939                         if (reinit && netif_running(adapter->netdev)) {
 940                                 adapter->pool_config = 1;
 941                                 ibmveth_close(adapter->netdev);
 942                                 adapter->pool_config = 0;
 943                                 dev->mtu = new_mtu;
 944                                 if ((rc = ibmveth_open(adapter->netdev)))
 945                                         return rc;
 946                         } else
 947                                 dev->mtu = new_mtu;
 948                         return 0;
 949                 }
 950         }
 951         return -EINVAL;
 952 }
 953
 954 #ifdef CONFIG_NET_POLL_CONTROLLER
 955 static void ibmveth_poll_controller(struct net_device *dev)
 956 {
 957         ibmveth_replenish_task(dev->priv);
 958         ibmveth_interrupt(dev->irq, dev);
 959 }
 960 #endif
 961
 962 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 963 {
 964         int rc, i;
 965         struct net_device *netdev;
 966         struct ibmveth_adapter *adapter;
 967
 968         unsigned char *mac_addr_p;
 969         unsigned int *mcastFilterSize_p;
 970
 971
 972         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 973                                         dev->unit_address);
 974
 975         mac_addr_p = (unsigned char *) vio_get_attribute(dev,
 976                                                 VETH_MAC_ADDR, NULL);
 977         if(!mac_addr_p) {
 978                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 979                                 "attribute\n", __FILE__, __LINE__);
 980                 return 0;
 981         }
 982
 983         mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
 984                                                 VETH_MCAST_FILTER_SIZE, NULL);
 985         if(!mcastFilterSize_p) {
 986                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 987                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 988                                 __FILE__, __LINE__);
 989                 return 0;
 990         }
 991
 992         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 993
 994         if(!netdev)
 995                 return -ENOMEM;
 996
 997         SET_MODULE_OWNER(netdev);
 998
 999         adapter = netdev->priv;
1000         dev->dev.driver_data = netdev;
1001
1002         adapter->vdev = dev;
1003         adapter->netdev = netdev;
1004         adapter->mcastFilterSize= *mcastFilterSize_p;
1005         adapter->pool_config = 0;
1006
1007         netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1008
1009         /*      Some older boxes running PHYP non-natively have an OF that
1010                 returns a 8-byte local-mac-address field (and the first
1011                 2 bytes have to be ignored) while newer boxes' OF return
1012                 a 6-byte field. Note that IEEE 1275 specifies that
1013                 local-mac-address must be a 6-byte field.
1014                 The RPA doc specifies that the first byte must be 10b, so
1015                 we'll just look for it to solve this 8 vs. 6 byte field issue */
1016
1017         if ((*mac_addr_p & 0x3) != 0x02)
1018                 mac_addr_p += 2;
1019
1020         adapter->mac_addr = 0;
1021         memcpy(&adapter->mac_addr, mac_addr_p, 6);
1022
1023         netdev->irq = dev->irq;
1024         netdev->open               = ibmveth_open;
1025         netdev->stop               = ibmveth_close;
1026         netdev->hard_start_xmit    = ibmveth_start_xmit;
1027         netdev->get_stats          = ibmveth_get_stats;
1028         netdev->set_multicast_list = ibmveth_set_multicast_list;
1029         netdev->do_ioctl           = ibmveth_ioctl;
1030         netdev->ethtool_ops           = &netdev_ethtool_ops;
1031         netdev->change_mtu         = ibmveth_change_mtu;
1032         SET_NETDEV_DEV(netdev, &dev->dev);
1033 #ifdef CONFIG_NET_POLL_CONTROLLER
1034         netdev->poll_controller = ibmveth_poll_controller;
1035 #endif
1036         netdev->features |= NETIF_F_LLTX;
1037         spin_lock_init(&adapter->stats_lock);
1038
1039         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1040
1041         for(i = 0; i<IbmVethNumBufferPools; i++) {
1042                 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1043                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1044                                          pool_count[i], pool_size[i],
1045                                          pool_active[i]);
1046                 kobj->parent = &dev->dev.kobj;
1047                 sprintf(kobj->name, "pool%d", i);
1048                 kobj->ktype = &ktype_veth_pool;
1049                 kobject_register(kobj);
1050         }
1051
1052         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1053
1054         adapter->buffer_list_dma = DMA_ERROR_CODE;
1055         adapter->filter_list_dma = DMA_ERROR_CODE;
1056         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1057
1058         ibmveth_debug_printk("registering netdev...\n");
1059
1060         rc = register_netdev(netdev);
1061
1062         if(rc) {
1063                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1064                 free_netdev(netdev);
1065                 return rc;
1066         }
1067
1068         ibmveth_debug_printk("registered\n");
1069
1070         ibmveth_proc_register_adapter(adapter);
1071
1072         return 0;
1073 }
1074
1075 static int __devexit ibmveth_remove(struct vio_dev *dev)
1076 {
1077         struct net_device *netdev = dev->dev.driver_data;
1078         struct ibmveth_adapter *adapter = netdev->priv;
1079         int i;
1080
1081         for(i = 0; i<IbmVethNumBufferPools; i++)
1082                 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1083
1084         unregister_netdev(netdev);
1085
1086         ibmveth_proc_unregister_adapter(adapter);
1087
1088         free_netdev(netdev);
1089         return 0;
1090 }
1091
1092 #ifdef CONFIG_PROC_FS
1093 static void ibmveth_proc_register_driver(void)
1094 {
1095         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1096         if (ibmveth_proc_dir) {
1097                 SET_MODULE_OWNER(ibmveth_proc_dir);
1098         }
1099 }
1100
1101 static void ibmveth_proc_unregister_driver(void)
1102 {
1103         remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1104 }
1105
1106 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1107 {
1108         if (*pos == 0) {
1109                 return (void *)1;
1110         } else {
1111                 return NULL;
1112         }
1113 }
1114
1115 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1116 {
1117         ++*pos;
1118         return NULL;
1119 }
1120
1121 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1122 {
1123 }
1124
1125 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1126 {
1127         struct ibmveth_adapter *adapter = seq->private;
1128         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1129         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1130
1131         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1132
1133         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1134         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1135                    current_mac[0], current_mac[1], current_mac[2],
1136                    current_mac[3], current_mac[4], current_mac[5]);
1137         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1138                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1139                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1140
1141         seq_printf(seq, "\nAdapter Statistics:\n");
1142         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1143         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1144         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1145         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1146         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1147         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1148         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1149         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1150         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1151         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1152
1153         return 0;
1154 }
1155 static struct seq_operations ibmveth_seq_ops = {
1156         .start = ibmveth_seq_start,
1157         .next  = ibmveth_seq_next,
1158         .stop  = ibmveth_seq_stop,
1159         .show  = ibmveth_seq_show,
1160 };
1161
1162 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1163 {
1164         struct seq_file *seq;
1165         struct proc_dir_entry *proc;
1166         int rc;
1167
1168         rc = seq_open(file, &ibmveth_seq_ops);
1169         if (!rc) {
1170                 /* recover the pointer buried in proc_dir_entry data */
1171                 seq = file->private_data;
1172                 proc = PDE(inode);
1173                 seq->private = proc->data;
1174         }
1175         return rc;
1176 }
1177
1178 static const struct file_operations ibmveth_proc_fops = {
1179         .owner   = THIS_MODULE,
1180         .open    = ibmveth_proc_open,
1181         .read    = seq_read,
1182         .llseek  = seq_lseek,
1183         .release = seq_release,
1184 };
1185
1186 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1187 {
1188         struct proc_dir_entry *entry;
1189         if (ibmveth_proc_dir) {
1190                 char u_addr[10];
1191                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1192                 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1193                 if (!entry) {
1194                         ibmveth_error_printk("Cannot create adapter proc entry");
1195                 } else {
1196                         entry->data = (void *) adapter;
1197                         entry->proc_fops = &ibmveth_proc_fops;
1198                         SET_MODULE_OWNER(entry);
1199                 }
1200         }
1201         return;
1202 }
1203
1204 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1205 {
1206         if (ibmveth_proc_dir) {
1207                 char u_addr[10];
1208                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1209                 remove_proc_entry(u_addr, ibmveth_proc_dir);
1210         }
1211 }
1212
1213 #else /* CONFIG_PROC_FS */
1214 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1215 {
1216 }
1217
1218 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1219 {
1220 }
1221 static void ibmveth_proc_register_driver(void)
1222 {
1223 }
1224
1225 static void ibmveth_proc_unregister_driver(void)
1226 {
1227 }
1228 #endif /* CONFIG_PROC_FS */
1229
1230 static struct attribute veth_active_attr;
1231 static struct attribute veth_num_attr;
1232 static struct attribute veth_size_attr;
1233
1234 static ssize_t veth_pool_show(struct kobject * kobj,
1235                               struct attribute * attr, char * buf)
1236 {
1237         struct ibmveth_buff_pool *pool = container_of(kobj,
1238                                                       struct ibmveth_buff_pool,
1239                                                       kobj);
1240
1241         if (attr == &veth_active_attr)
1242                 return sprintf(buf, "%d\n", pool->active);
1243         else if (attr == &veth_num_attr)
1244                 return sprintf(buf, "%d\n", pool->size);
1245         else if (attr == &veth_size_attr)
1246                 return sprintf(buf, "%d\n", pool->buff_size);
1247         return 0;
1248 }
1249
1250 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1251 const char * buf, size_t count)
1252 {
1253         struct ibmveth_buff_pool *pool = container_of(kobj,
1254                                                       struct ibmveth_buff_pool,
1255                                                       kobj);
1256         struct net_device *netdev =
1257             container_of(kobj->parent, struct device, kobj)->driver_data;
1258         struct ibmveth_adapter *adapter = netdev->priv;
1259         long value = simple_strtol(buf, NULL, 10);
1260         long rc;
1261
1262         if (attr == &veth_active_attr) {
1263                 if (value && !pool->active) {
1264                         if (netif_running(netdev)) {
1265                                 if(ibmveth_alloc_buffer_pool(pool)) {
1266                                         ibmveth_error_printk("unable to alloc pool\n");
1267                                         return -ENOMEM;
1268                                 }
1269                                 pool->active = 1;
1270                                 adapter->pool_config = 1;
1271                                 ibmveth_close(netdev);
1272                                 adapter->pool_config = 0;
1273                                 if ((rc = ibmveth_open(netdev)))
1274                                         return rc;
1275                         } else
1276                                 pool->active = 1;
1277                 } else if (!value && pool->active) {
1278                         int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1279                         int i;
1280                         /* Make sure there is a buffer pool with buffers that
1281                            can hold a packet of the size of the MTU */
1282                         for (i = 0; i < IbmVethNumBufferPools; i++) {
1283                                 if (pool == &adapter->rx_buff_pool[i])
1284                                         continue;
1285                                 if (!adapter->rx_buff_pool[i].active)
1286                                         continue;
1287                                 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1288                                         break;
1289                         }
1290
1291                         if (i == IbmVethNumBufferPools) {
1292                                 ibmveth_error_printk("no active pool >= MTU\n");
1293                                 return -EPERM;
1294                         }
1295
1296                         pool->active = 0;
1297                         if (netif_running(netdev)) {
1298                                 adapter->pool_config = 1;
1299                                 ibmveth_close(netdev);
1300                                 adapter->pool_config = 0;
1301                                 if ((rc = ibmveth_open(netdev)))
1302                                         return rc;
1303                         }
1304                 }
1305         } else if (attr == &veth_num_attr) {
1306                 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1307                         return -EINVAL;
1308                 else {
1309                         if (netif_running(netdev)) {
1310                                 adapter->pool_config = 1;
1311                                 ibmveth_close(netdev);
1312                                 adapter->pool_config = 0;
1313                                 pool->size = value;
1314                                 if ((rc = ibmveth_open(netdev)))
1315                                         return rc;
1316                         } else
1317                                 pool->size = value;
1318                 }
1319         } else if (attr == &veth_size_attr) {
1320                 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1321                         return -EINVAL;
1322                 else {
1323                         if (netif_running(netdev)) {
1324                                 adapter->pool_config = 1;
1325                                 ibmveth_close(netdev);
1326                                 adapter->pool_config = 0;
1327                                 pool->buff_size = value;
1328                                 if ((rc = ibmveth_open(netdev)))
1329                                         return rc;
1330                         } else
1331                                 pool->buff_size = value;
1332                 }
1333         }
1334
1335         /* kick the interrupt handler to allocate/deallocate pools */
1336         ibmveth_interrupt(netdev->irq, netdev);
1337         return count;
1338 }
1339
1340
1341 #define ATTR(_name, _mode)      \
1342         struct attribute veth_##_name##_attr = {               \
1343         .name = __stringify(_name), .mode = _mode, \
1344         };
1345
1346 static ATTR(active, 0644);
1347 static ATTR(num, 0644);
1348 static ATTR(size, 0644);
1349
1350 static struct attribute * veth_pool_attrs[] = {
1351         &veth_active_attr,
1352         &veth_num_attr,
1353         &veth_size_attr,
1354         NULL,
1355 };
1356
1357 static struct sysfs_ops veth_pool_ops = {
1358         .show   = veth_pool_show,
1359         .store  = veth_pool_store,
1360 };
1361
1362 static struct kobj_type ktype_veth_pool = {
1363         .release        = NULL,
1364         .sysfs_ops      = &veth_pool_ops,
1365         .default_attrs  = veth_pool_attrs,
1366 };
1367
1368
1369 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1370         { "network", "IBM,l-lan"},
1371         { "", "" }
1372 };
1373 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1374
1375 static struct vio_driver ibmveth_driver = {
1376         .id_table       = ibmveth_device_table,
1377         .probe          = ibmveth_probe,
1378         .remove         = ibmveth_remove,
1379         .driver         = {
1380                 .name   = ibmveth_driver_name,
1381                 .owner  = THIS_MODULE,
1382         }
1383 };
1384
1385 static int __init ibmveth_module_init(void)
1386 {
1387         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1388
1389         ibmveth_proc_register_driver();
1390
1391         return vio_register_driver(&ibmveth_driver);
1392 }
1393
1394 static void __exit ibmveth_module_exit(void)
1395 {
1396         vio_unregister_driver(&ibmveth_driver);
1397         ibmveth_proc_unregister_driver();
1398 }
1399
1400 module_init(ibmveth_module_init);
1401 module_exit(ibmveth_module_exit);