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/iommu.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 net_device *dev, 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, struct pt_regs *regs);
  97 static inline 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 "net/ibmveth"
 102 static struct proc_dir_entry *ibmveth_proc_dir;
 103 #endif
 104
 105 static const char ibmveth_driver_name[] = "ibmveth";
 106 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
 107 #define ibmveth_driver_version "1.03"
 108
 109 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
 110 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 111 MODULE_LICENSE("GPL");
 112 MODULE_VERSION(ibmveth_driver_version);
 113
 114 /* simple methods of getting data from the current rxq entry */
 115 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 116 {
 117         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
 118 }
 119
 120 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 121 {
 122         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
 123 }
 124
 125 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 126 {
 127         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
 128 }
 129
 130 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 131 {
 132         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 133 }
 134
 135 /* setup the initial settings for a buffer pool */
 136 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, 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++ % pool->size;
 216                 pool->consumer_index = free_index;
 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++ % adapter->rx_buff_pool[pool].size;
 333         adapter->rx_buff_pool[pool].producer_index = free_index;
 334         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 335
 336         mb();
 337
 338         atomic_dec(&(adapter->rx_buff_pool[pool].available));
 339 }
 340
 341 /* get the current buffer on the rx queue */
 342 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
 343 {
 344         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
 345         unsigned int pool = correlator >> 32;
 346         unsigned int index = correlator & 0xffffffffUL;
 347
 348         ibmveth_assert(pool < IbmVethNumBufferPools);
 349         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 350
 351         return adapter->rx_buff_pool[pool].skbuff[index];
 352 }
 353
 354 /* recycle the current buffer on the rx queue */
 355 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 356 {
 357         u32 q_index = adapter->rx_queue.index;
 358         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
 359         unsigned int pool = correlator >> 32;
 360         unsigned int index = correlator & 0xffffffffUL;
 361         union ibmveth_buf_desc desc;
 362         unsigned long lpar_rc;
 363
 364         ibmveth_assert(pool < IbmVethNumBufferPools);
 365         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
 366
 367         if(!adapter->rx_buff_pool[pool].active) {
 368                 ibmveth_rxq_harvest_buffer(adapter);
 369                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
 370                 return;
 371         }
 372
 373         desc.desc = 0;
 374         desc.fields.valid = 1;
 375         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
 376         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 377
 378         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
 379
 380         if(lpar_rc != H_SUCCESS) {
 381                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
 382                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 383         }
 384
 385         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 386                 adapter->rx_queue.index = 0;
 387                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 388         }
 389 }
 390
 391 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
 392 {
 393         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
 394
 395         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
 396                 adapter->rx_queue.index = 0;
 397                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
 398         }
 399 }
 400
 401 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
 402 {
 403         int i;
 404
 405         if(adapter->buffer_list_addr != NULL) {
 406                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
 407                         dma_unmap_single(&adapter->vdev->dev,
 408                                         adapter->buffer_list_dma, 4096,
 409                                         DMA_BIDIRECTIONAL);
 410                         adapter->buffer_list_dma = DMA_ERROR_CODE;
 411                 }
 412                 free_page((unsigned long)adapter->buffer_list_addr);
 413                 adapter->buffer_list_addr = NULL;
 414         }
 415
 416         if(adapter->filter_list_addr != NULL) {
 417                 if(!dma_mapping_error(adapter->filter_list_dma)) {
 418                         dma_unmap_single(&adapter->vdev->dev,
 419                                         adapter->filter_list_dma, 4096,
 420                                         DMA_BIDIRECTIONAL);
 421                         adapter->filter_list_dma = DMA_ERROR_CODE;
 422                 }
 423                 free_page((unsigned long)adapter->filter_list_addr);
 424                 adapter->filter_list_addr = NULL;
 425         }
 426
 427         if(adapter->rx_queue.queue_addr != NULL) {
 428                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
 429                         dma_unmap_single(&adapter->vdev->dev,
 430                                         adapter->rx_queue.queue_dma,
 431                                         adapter->rx_queue.queue_len,
 432                                         DMA_BIDIRECTIONAL);
 433                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
 434                 }
 435                 kfree(adapter->rx_queue.queue_addr);
 436                 adapter->rx_queue.queue_addr = NULL;
 437         }
 438
 439         for(i = 0; i<IbmVethNumBufferPools; i++)
 440                 if (adapter->rx_buff_pool[i].active)
 441                         ibmveth_free_buffer_pool(adapter,
 442                                                  &adapter->rx_buff_pool[i]);
 443 }
 444
 445 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
 446         union ibmveth_buf_desc rxq_desc, u64 mac_address)
 447 {
 448         int rc, try_again = 1;
 449
 450         /* After a kexec the adapter will still be open, so our attempt to
 451         * open it will fail. So if we get a failure we free the adapter and
 452         * try again, but only once. */
 453 retry:
 454         rc = h_register_logical_lan(adapter->vdev->unit_address,
 455                                     adapter->buffer_list_dma, rxq_desc.desc,
 456                                     adapter->filter_list_dma, mac_address);
 457
 458         if (rc != H_SUCCESS && try_again) {
 459                 do {
 460                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 461                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 462
 463                 try_again = 0;
 464                 goto retry;
 465         }
 466
 467         return rc;
 468 }
 469
 470 static int ibmveth_open(struct net_device *netdev)
 471 {
 472         struct ibmveth_adapter *adapter = netdev->priv;
 473         u64 mac_address = 0;
 474         int rxq_entries = 1;
 475         unsigned long lpar_rc;
 476         int rc;
 477         union ibmveth_buf_desc rxq_desc;
 478         int i;
 479
 480         ibmveth_debug_printk("open starting\n");
 481
 482         for(i = 0; i<IbmVethNumBufferPools; i++)
 483                 rxq_entries += adapter->rx_buff_pool[i].size;
 484
 485         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 486         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
 487
 488         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
 489                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
 490                 ibmveth_cleanup(adapter);
 491                 return -ENOMEM;
 492         }
 493
 494         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
 495         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
 496
 497         if(!adapter->rx_queue.queue_addr) {
 498                 ibmveth_error_printk("unable to allocate rx queue pages\n");
 499                 ibmveth_cleanup(adapter);
 500                 return -ENOMEM;
 501         }
 502
 503         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
 504                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
 505         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
 506                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
 507         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
 508                         adapter->rx_queue.queue_addr,
 509                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
 510
 511         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
 512            (dma_mapping_error(adapter->filter_list_dma)) ||
 513            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
 514                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
 515                 ibmveth_cleanup(adapter);
 516                 return -ENOMEM;
 517         }
 518
 519         adapter->rx_queue.index = 0;
 520         adapter->rx_queue.num_slots = rxq_entries;
 521         adapter->rx_queue.toggle = 1;
 522
 523         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 524         mac_address = mac_address >> 16;
 525
 526         rxq_desc.desc = 0;
 527         rxq_desc.fields.valid = 1;
 528         rxq_desc.fields.length = adapter->rx_queue.queue_len;
 529         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 530
 531         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
 532         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
 533         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
 534
 535         h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 536
 537         lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
 538
 539         if(lpar_rc != H_SUCCESS) {
 540                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
 541                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
 542                                      adapter->buffer_list_dma,
 543                                      adapter->filter_list_dma,
 544                                      rxq_desc.desc,
 545                                      mac_address);
 546                 ibmveth_cleanup(adapter);
 547                 return -ENONET;
 548         }
 549
 550         for(i = 0; i<IbmVethNumBufferPools; i++) {
 551                 if(!adapter->rx_buff_pool[i].active)
 552                         continue;
 553                 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
 554                         ibmveth_error_printk("unable to alloc pool\n");
 555                         adapter->rx_buff_pool[i].active = 0;
 556                         ibmveth_cleanup(adapter);
 557                         return -ENOMEM ;
 558                 }
 559         }
 560
 561         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
 562         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
 563                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
 564                 do {
 565                         rc = h_free_logical_lan(adapter->vdev->unit_address);
 566                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
 567
 568                 ibmveth_cleanup(adapter);
 569                 return rc;
 570         }
 571
 572         ibmveth_debug_printk("initial replenish cycle\n");
 573         ibmveth_interrupt(netdev->irq, netdev, NULL);
 574
 575         netif_start_queue(netdev);
 576
 577         ibmveth_debug_printk("open complete\n");
 578
 579         return 0;
 580 }
 581
 582 static int ibmveth_close(struct net_device *netdev)
 583 {
 584         struct ibmveth_adapter *adapter = netdev->priv;
 585         long lpar_rc;
 586
 587         ibmveth_debug_printk("close starting\n");
 588
 589         if (!adapter->pool_config)
 590                 netif_stop_queue(netdev);
 591
 592         free_irq(netdev->irq, netdev);
 593
 594         do {
 595                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
 596         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
 597
 598         if(lpar_rc != H_SUCCESS)
 599         {
 600                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
 601                                      lpar_rc);
 602         }
 603
 604         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
 605
 606         ibmveth_cleanup(adapter);
 607
 608         ibmveth_debug_printk("close complete\n");
 609
 610         return 0;
 611 }
 612
 613 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
 614         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
 615         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
 616         cmd->speed = SPEED_1000;
 617         cmd->duplex = DUPLEX_FULL;
 618         cmd->port = PORT_FIBRE;
 619         cmd->phy_address = 0;
 620         cmd->transceiver = XCVR_INTERNAL;
 621         cmd->autoneg = AUTONEG_ENABLE;
 622         cmd->maxtxpkt = 0;
 623         cmd->maxrxpkt = 1;
 624         return 0;
 625 }
 626
 627 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
 628         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
 629         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
 630 }
 631
 632 static u32 netdev_get_link(struct net_device *dev) {
 633         return 1;
 634 }
 635
 636 static const struct ethtool_ops netdev_ethtool_ops = {
 637         .get_drvinfo            = netdev_get_drvinfo,
 638         .get_settings           = netdev_get_settings,
 639         .get_link               = netdev_get_link,
 640         .get_sg                 = ethtool_op_get_sg,
 641         .get_tx_csum            = ethtool_op_get_tx_csum,
 642 };
 643
 644 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 645 {
 646         return -EOPNOTSUPP;
 647 }
 648
 649 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
 650
 651 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 652 {
 653         struct ibmveth_adapter *adapter = netdev->priv;
 654         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
 655         unsigned long lpar_rc;
 656         int nfrags = 0, curfrag;
 657         unsigned long correlator;
 658         unsigned long flags;
 659         unsigned int retry_count;
 660         unsigned int tx_dropped = 0;
 661         unsigned int tx_bytes = 0;
 662         unsigned int tx_packets = 0;
 663         unsigned int tx_send_failed = 0;
 664         unsigned int tx_map_failed = 0;
 665
 666
 667         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
 668                 tx_dropped++;
 669                 goto out;
 670         }
 671
 672         memset(&desc, 0, sizeof(desc));
 673
 674         /* nfrags = number of frags after the initial fragment */
 675         nfrags = skb_shinfo(skb)->nr_frags;
 676
 677         if(nfrags)
 678                 adapter->tx_multidesc_send++;
 679
 680         /* map the initial fragment */
 681         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
 682         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
 683                                         desc[0].fields.length, DMA_TO_DEVICE);
 684         desc[0].fields.valid   = 1;
 685
 686         if(dma_mapping_error(desc[0].fields.address)) {
 687                 ibmveth_error_printk("tx: unable to map initial fragment\n");
 688                 tx_map_failed++;
 689                 tx_dropped++;
 690                 goto out;
 691         }
 692
 693         curfrag = nfrags;
 694
 695         /* map fragments past the initial portion if there are any */
 696         while(curfrag--) {
 697                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
 698                 desc[curfrag+1].fields.address
 699                         = dma_map_single(&adapter->vdev->dev,
 700                                 page_address(frag->page) + frag->page_offset,
 701                                 frag->size, DMA_TO_DEVICE);
 702                 desc[curfrag+1].fields.length = frag->size;
 703                 desc[curfrag+1].fields.valid  = 1;
 704
 705                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
 706                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
 707                         tx_map_failed++;
 708                         tx_dropped++;
 709                         /* Free all the mappings we just created */
 710                         while(curfrag < nfrags) {
 711                                 dma_unmap_single(&adapter->vdev->dev,
 712                                                  desc[curfrag+1].fields.address,
 713                                                  desc[curfrag+1].fields.length,
 714                                                  DMA_TO_DEVICE);
 715                                 curfrag++;
 716                         }
 717                         goto out;
 718                 }
 719         }
 720
 721         /* send the frame. Arbitrarily set retrycount to 1024 */
 722         correlator = 0;
 723         retry_count = 1024;
 724         do {
 725                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
 726                                              desc[0].desc,
 727                                              desc[1].desc,
 728                                              desc[2].desc,
 729                                              desc[3].desc,
 730                                              desc[4].desc,
 731                                              desc[5].desc,
 732                                              correlator,
 733                                              &correlator);
 734         } while ((lpar_rc == H_BUSY) && (retry_count--));
 735
 736         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
 737                 int i;
 738                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
 739                 for(i = 0; i < 6; i++) {
 740                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
 741                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
 742                 }
 743                 tx_send_failed++;
 744                 tx_dropped++;
 745         } else {
 746                 tx_packets++;
 747                 tx_bytes += skb->len;
 748                 netdev->trans_start = jiffies;
 749         }
 750
 751         do {
 752                 dma_unmap_single(&adapter->vdev->dev,
 753                                 desc[nfrags].fields.address,
 754                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
 755         } while(--nfrags >= 0);
 756
 757 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
 758         adapter->stats.tx_dropped += tx_dropped;
 759         adapter->stats.tx_bytes += tx_bytes;
 760         adapter->stats.tx_packets += tx_packets;
 761         adapter->tx_send_failed += tx_send_failed;
 762         adapter->tx_map_failed += tx_map_failed;
 763         spin_unlock_irqrestore(&adapter->stats_lock, flags);
 764
 765         dev_kfree_skb(skb);
 766         return 0;
 767 }
 768
 769 static int ibmveth_poll(struct net_device *netdev, int *budget)
 770 {
 771         struct ibmveth_adapter *adapter = netdev->priv;
 772         int max_frames_to_process = netdev->quota;
 773         int frames_processed = 0;
 774         int more_work = 1;
 775         unsigned long lpar_rc;
 776
 777  restart_poll:
 778         do {
 779                 struct net_device *netdev = adapter->netdev;
 780
 781                 if(ibmveth_rxq_pending_buffer(adapter)) {
 782                         struct sk_buff *skb;
 783
 784                         rmb();
 785
 786                         if(!ibmveth_rxq_buffer_valid(adapter)) {
 787                                 wmb(); /* suggested by larson1 */
 788                                 adapter->rx_invalid_buffer++;
 789                                 ibmveth_debug_printk("recycling invalid buffer\n");
 790                                 ibmveth_rxq_recycle_buffer(adapter);
 791                         } else {
 792                                 int length = ibmveth_rxq_frame_length(adapter);
 793                                 int offset = ibmveth_rxq_frame_offset(adapter);
 794                                 skb = ibmveth_rxq_get_buffer(adapter);
 795
 796                                 ibmveth_rxq_harvest_buffer(adapter);
 797
 798                                 skb_reserve(skb, offset);
 799                                 skb_put(skb, length);
 800                                 skb->dev = netdev;
 801                                 skb->protocol = eth_type_trans(skb, netdev);
 802
 803                                 netif_receive_skb(skb); /* send it up */
 804
 805                                 adapter->stats.rx_packets++;
 806                                 adapter->stats.rx_bytes += length;
 807                                 frames_processed++;
 808                                 netdev->last_rx = jiffies;
 809                         }
 810                 } else {
 811                         more_work = 0;
 812                 }
 813         } while(more_work && (frames_processed < max_frames_to_process));
 814
 815         ibmveth_replenish_task(adapter);
 816
 817         if(more_work) {
 818                 /* more work to do - return that we are not done yet */
 819                 netdev->quota -= frames_processed;
 820                 *budget -= frames_processed;
 821                 return 1;
 822         }
 823
 824         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
 825         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
 826
 827         ibmveth_assert(lpar_rc == H_SUCCESS);
 828
 829         netif_rx_complete(netdev);
 830
 831         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
 832         {
 833                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 834                 ibmveth_assert(lpar_rc == H_SUCCESS);
 835                 more_work = 1;
 836                 goto restart_poll;
 837         }
 838
 839         netdev->quota -= frames_processed;
 840         *budget -= frames_processed;
 841
 842         /* we really are done */
 843         return 0;
 844 }
 845
 846 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 847 {
 848         struct net_device *netdev = dev_instance;
 849         struct ibmveth_adapter *adapter = netdev->priv;
 850         unsigned long lpar_rc;
 851
 852         if(netif_rx_schedule_prep(netdev)) {
 853                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
 854                 ibmveth_assert(lpar_rc == H_SUCCESS);
 855                 __netif_rx_schedule(netdev);
 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 i;
 919
 920         if (new_mtu < IBMVETH_MAX_MTU)
 921                 return -EINVAL;
 922
 923         /* Look for an active buffer pool that can hold the new MTU */
 924         for(i = 0; i<IbmVethNumBufferPools; i++) {
 925                 if (!adapter->rx_buff_pool[i].active)
 926                         continue;
 927                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
 928                         dev->mtu = new_mtu;
 929                         return 0;
 930                 }
 931         }
 932         return -EINVAL;
 933 }
 934
 935 #ifdef CONFIG_NET_POLL_CONTROLLER
 936 static void ibmveth_poll_controller(struct net_device *dev)
 937 {
 938         ibmveth_replenish_task(dev->priv);
 939         ibmveth_interrupt(dev->irq, dev, NULL);
 940 }
 941 #endif
 942
 943 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 944 {
 945         int rc, i;
 946         struct net_device *netdev;
 947         struct ibmveth_adapter *adapter = NULL;
 948
 949         unsigned char *mac_addr_p;
 950         unsigned int *mcastFilterSize_p;
 951
 952
 953         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
 954                                         dev->unit_address);
 955
 956         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
 957         if(!mac_addr_p) {
 958                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
 959                                 "attribute\n", __FILE__, __LINE__);
 960                 return 0;
 961         }
 962
 963         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
 964         if(!mcastFilterSize_p) {
 965                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
 966                                 "VETH_MCAST_FILTER_SIZE attribute\n",
 967                                 __FILE__, __LINE__);
 968                 return 0;
 969         }
 970
 971         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
 972
 973         if(!netdev)
 974                 return -ENOMEM;
 975
 976         SET_MODULE_OWNER(netdev);
 977
 978         adapter = netdev->priv;
 979         memset(adapter, 0, sizeof(adapter));
 980         dev->dev.driver_data = netdev;
 981
 982         adapter->vdev = dev;
 983         adapter->netdev = netdev;
 984         adapter->mcastFilterSize= *mcastFilterSize_p;
 985         adapter->pool_config = 0;
 986
 987         /*      Some older boxes running PHYP non-natively have an OF that
 988                 returns a 8-byte local-mac-address field (and the first
 989                 2 bytes have to be ignored) while newer boxes' OF return
 990                 a 6-byte field. Note that IEEE 1275 specifies that
 991                 local-mac-address must be a 6-byte field.
 992                 The RPA doc specifies that the first byte must be 10b, so
 993                 we'll just look for it to solve this 8 vs. 6 byte field issue */
 994
 995         if ((*mac_addr_p & 0x3) != 0x02)
 996                 mac_addr_p += 2;
 997
 998         adapter->mac_addr = 0;
 999         memcpy(&adapter->mac_addr, mac_addr_p, 6);
1000
1001         adapter->liobn = dev->iommu_table->it_index;
1002
1003         netdev->irq = dev->irq;
1004         netdev->open               = ibmveth_open;
1005         netdev->poll               = ibmveth_poll;
1006         netdev->weight             = 16;
1007         netdev->stop               = ibmveth_close;
1008         netdev->hard_start_xmit    = ibmveth_start_xmit;
1009         netdev->get_stats          = ibmveth_get_stats;
1010         netdev->set_multicast_list = ibmveth_set_multicast_list;
1011         netdev->do_ioctl           = ibmveth_ioctl;
1012         netdev->ethtool_ops           = &netdev_ethtool_ops;
1013         netdev->change_mtu         = ibmveth_change_mtu;
1014         SET_NETDEV_DEV(netdev, &dev->dev);
1015 #ifdef CONFIG_NET_POLL_CONTROLLER
1016         netdev->poll_controller = ibmveth_poll_controller;
1017 #endif
1018         netdev->features |= NETIF_F_LLTX;
1019         spin_lock_init(&adapter->stats_lock);
1020
1021         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1022
1023         for(i = 0; i<IbmVethNumBufferPools; i++) {
1024                 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1025                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1026                                          pool_count[i], pool_size[i],
1027                                          pool_active[i]);
1028                 kobj->parent = &dev->dev.kobj;
1029                 sprintf(kobj->name, "pool%d", i);
1030                 kobj->ktype = &ktype_veth_pool;
1031                 kobject_register(kobj);
1032         }
1033
1034         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1035
1036         adapter->buffer_list_dma = DMA_ERROR_CODE;
1037         adapter->filter_list_dma = DMA_ERROR_CODE;
1038         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1039
1040         ibmveth_debug_printk("registering netdev...\n");
1041
1042         rc = register_netdev(netdev);
1043
1044         if(rc) {
1045                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1046                 free_netdev(netdev);
1047                 return rc;
1048         }
1049
1050         ibmveth_debug_printk("registered\n");
1051
1052         ibmveth_proc_register_adapter(adapter);
1053
1054         return 0;
1055 }
1056
1057 static int __devexit ibmveth_remove(struct vio_dev *dev)
1058 {
1059         struct net_device *netdev = dev->dev.driver_data;
1060         struct ibmveth_adapter *adapter = netdev->priv;
1061         int i;
1062
1063         for(i = 0; i<IbmVethNumBufferPools; i++)
1064                 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1065
1066         unregister_netdev(netdev);
1067
1068         ibmveth_proc_unregister_adapter(adapter);
1069
1070         free_netdev(netdev);
1071         return 0;
1072 }
1073
1074 #ifdef CONFIG_PROC_FS
1075 static void ibmveth_proc_register_driver(void)
1076 {
1077         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1078         if (ibmveth_proc_dir) {
1079                 SET_MODULE_OWNER(ibmveth_proc_dir);
1080         }
1081 }
1082
1083 static void ibmveth_proc_unregister_driver(void)
1084 {
1085         remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1086 }
1087
1088 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1089 {
1090         if (*pos == 0) {
1091                 return (void *)1;
1092         } else {
1093                 return NULL;
1094         }
1095 }
1096
1097 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1098 {
1099         ++*pos;
1100         return NULL;
1101 }
1102
1103 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1104 {
1105 }
1106
1107 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1108 {
1109         struct ibmveth_adapter *adapter = seq->private;
1110         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1111         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1112
1113         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1114
1115         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1116         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1117         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1118                    current_mac[0], current_mac[1], current_mac[2],
1119                    current_mac[3], current_mac[4], current_mac[5]);
1120         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1121                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1122                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1123
1124         seq_printf(seq, "\nAdapter Statistics:\n");
1125         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1126         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1127         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1128         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1129         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1130         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1131         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1132         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1133         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1134         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1135
1136         return 0;
1137 }
1138 static struct seq_operations ibmveth_seq_ops = {
1139         .start = ibmveth_seq_start,
1140         .next  = ibmveth_seq_next,
1141         .stop  = ibmveth_seq_stop,
1142         .show  = ibmveth_seq_show,
1143 };
1144
1145 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1146 {
1147         struct seq_file *seq;
1148         struct proc_dir_entry *proc;
1149         int rc;
1150
1151         rc = seq_open(file, &ibmveth_seq_ops);
1152         if (!rc) {
1153                 /* recover the pointer buried in proc_dir_entry data */
1154                 seq = file->private_data;
1155                 proc = PDE(inode);
1156                 seq->private = proc->data;
1157         }
1158         return rc;
1159 }
1160
1161 static struct file_operations ibmveth_proc_fops = {
1162         .owner   = THIS_MODULE,
1163         .open    = ibmveth_proc_open,
1164         .read    = seq_read,
1165         .llseek  = seq_lseek,
1166         .release = seq_release,
1167 };
1168
1169 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1170 {
1171         struct proc_dir_entry *entry;
1172         if (ibmveth_proc_dir) {
1173                 char u_addr[10];
1174                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1175                 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1176                 if (!entry) {
1177                         ibmveth_error_printk("Cannot create adapter proc entry");
1178                 } else {
1179                         entry->data = (void *) adapter;
1180                         entry->proc_fops = &ibmveth_proc_fops;
1181                         SET_MODULE_OWNER(entry);
1182                 }
1183         }
1184         return;
1185 }
1186
1187 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1188 {
1189         if (ibmveth_proc_dir) {
1190                 char u_addr[10];
1191                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1192                 remove_proc_entry(u_addr, ibmveth_proc_dir);
1193         }
1194 }
1195
1196 #else /* CONFIG_PROC_FS */
1197 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1198 {
1199 }
1200
1201 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1202 {
1203 }
1204 static void ibmveth_proc_register_driver(void)
1205 {
1206 }
1207
1208 static void ibmveth_proc_unregister_driver(void)
1209 {
1210 }
1211 #endif /* CONFIG_PROC_FS */
1212
1213 static struct attribute veth_active_attr;
1214 static struct attribute veth_num_attr;
1215 static struct attribute veth_size_attr;
1216
1217 static ssize_t veth_pool_show(struct kobject * kobj,
1218                               struct attribute * attr, char * buf)
1219 {
1220         struct ibmveth_buff_pool *pool = container_of(kobj,
1221                                                       struct ibmveth_buff_pool,
1222                                                       kobj);
1223
1224         if (attr == &veth_active_attr)
1225                 return sprintf(buf, "%d\n", pool->active);
1226         else if (attr == &veth_num_attr)
1227                 return sprintf(buf, "%d\n", pool->size);
1228         else if (attr == &veth_size_attr)
1229                 return sprintf(buf, "%d\n", pool->buff_size);
1230         return 0;
1231 }
1232
1233 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1234 const char * buf, size_t count)
1235 {
1236         struct ibmveth_buff_pool *pool = container_of(kobj,
1237                                                       struct ibmveth_buff_pool,
1238                                                       kobj);
1239         struct net_device *netdev =
1240             container_of(kobj->parent, struct device, kobj)->driver_data;
1241         struct ibmveth_adapter *adapter = netdev->priv;
1242         long value = simple_strtol(buf, NULL, 10);
1243         long rc;
1244
1245         if (attr == &veth_active_attr) {
1246                 if (value && !pool->active) {
1247                         if(ibmveth_alloc_buffer_pool(pool)) {
1248                                 ibmveth_error_printk("unable to alloc pool\n");
1249                                 return -ENOMEM;
1250                         }
1251                         pool->active = 1;
1252                         adapter->pool_config = 1;
1253                         ibmveth_close(netdev);
1254                         adapter->pool_config = 0;
1255                         if ((rc = ibmveth_open(netdev)))
1256                                 return rc;
1257                 } else if (!value && pool->active) {
1258                         int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1259                         int i;
1260                         /* Make sure there is a buffer pool with buffers that
1261                            can hold a packet of the size of the MTU */
1262                         for(i = 0; i<IbmVethNumBufferPools; i++) {
1263                                 if (pool == &adapter->rx_buff_pool[i])
1264                                         continue;
1265                                 if (!adapter->rx_buff_pool[i].active)
1266                                         continue;
1267                                 if (mtu < adapter->rx_buff_pool[i].buff_size) {
1268                                         pool->active = 0;
1269                                         h_free_logical_lan_buffer(adapter->
1270                                                                   vdev->
1271                                                                   unit_address,
1272                                                                   pool->
1273                                                                   buff_size);
1274                                 }
1275                         }
1276                         if (pool->active) {
1277                                 ibmveth_error_printk("no active pool >= MTU\n");
1278                                 return -EPERM;
1279                         }
1280                 }
1281         } else if (attr == &veth_num_attr) {
1282                 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1283                         return -EINVAL;
1284                 else {
1285                         adapter->pool_config = 1;
1286                         ibmveth_close(netdev);
1287                         adapter->pool_config = 0;
1288                         pool->size = value;
1289                         if ((rc = ibmveth_open(netdev)))
1290                                 return rc;
1291                 }
1292         } else if (attr == &veth_size_attr) {
1293                 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1294                         return -EINVAL;
1295                 else {
1296                         adapter->pool_config = 1;
1297                         ibmveth_close(netdev);
1298                         adapter->pool_config = 0;
1299                         pool->buff_size = value;
1300                         if ((rc = ibmveth_open(netdev)))
1301                                 return rc;
1302                 }
1303         }
1304
1305         /* kick the interrupt handler to allocate/deallocate pools */
1306         ibmveth_interrupt(netdev->irq, netdev, NULL);
1307         return count;
1308 }
1309
1310
1311 #define ATTR(_name, _mode)      \
1312         struct attribute veth_##_name##_attr = {               \
1313         .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
1314         };
1315
1316 static ATTR(active, 0644);
1317 static ATTR(num, 0644);
1318 static ATTR(size, 0644);
1319
1320 static struct attribute * veth_pool_attrs[] = {
1321         &veth_active_attr,
1322         &veth_num_attr,
1323         &veth_size_attr,
1324         NULL,
1325 };
1326
1327 static struct sysfs_ops veth_pool_ops = {
1328         .show   = veth_pool_show,
1329         .store  = veth_pool_store,
1330 };
1331
1332 static struct kobj_type ktype_veth_pool = {
1333         .release        = NULL,
1334         .sysfs_ops      = &veth_pool_ops,
1335         .default_attrs  = veth_pool_attrs,
1336 };
1337
1338
1339 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1340         { "network", "IBM,l-lan"},
1341         { "", "" }
1342 };
1343 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1344
1345 static struct vio_driver ibmveth_driver = {
1346         .id_table       = ibmveth_device_table,
1347         .probe          = ibmveth_probe,
1348         .remove         = ibmveth_remove,
1349         .driver         = {
1350                 .name   = ibmveth_driver_name,
1351                 .owner  = THIS_MODULE,
1352         }
1353 };
1354
1355 static int __init ibmveth_module_init(void)
1356 {
1357         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1358
1359         ibmveth_proc_register_driver();
1360
1361         return vio_register_driver(&ibmveth_driver);
1362 }
1363
1364 static void __exit ibmveth_module_exit(void)
1365 {
1366         vio_unregister_driver(&ibmveth_driver);
1367         ibmveth_proc_unregister_driver();
1368 }
1369
1370 module_init(ibmveth_module_init);
1371 module_exit(ibmveth_module_exit);