[PATCH] Make MODULE_DEVICE_TABLE work for vio devices
[linux-2.6.git] / drivers / net / ibmveth.c
1 /**************************************************************************/
2 /*                                                                        */
3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver                   */
4 /* Copyright (C) 2003 IBM Corp.                                           */
5 /*  Originally written by Dave Larson (larson1@us.ibm.com)                */
6 /*  Maintained by Santiago Leon (santil@us.ibm.com)                       */
7 /*                                                                        */
8 /*  This program is free software; you can redistribute it and/or modify  */
9 /*  it under the terms of the GNU General Public License as published by  */
10 /*  the Free Software Foundation; either version 2 of the License, or     */
11 /*  (at your option) any later version.                                   */
12 /*                                                                        */
13 /*  This program is distributed in the hope that it will be useful,       */
14 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
15 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
16 /*  GNU General Public License for more details.                          */
17 /*                                                                        */
18 /*  You should have received a copy of the GNU General Public License     */
19 /*  along with this program; if not, write to the Free Software           */
20 /*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  */
21 /*                                                                   USA  */
22 /*                                                                        */
23 /* This module contains the implementation of a virtual ethernet device   */
24 /* for use with IBM i/pSeries LPAR Linux.  It utilizes the logical LAN    */
25 /* option of the RS/6000 Platform Architechture to interface with virtual */
26 /* ethernet NICs that are presented to the partition by the hypervisor.   */
27 /*                                                                        */ 
28 /**************************************************************************/
29 /*
30   TODO:
31   - remove frag processing code - no longer needed
32   - add support for sysfs
33   - possibly remove procfs support
34 */
35
36 #include <linux/config.h>
37 #include <linux/module.h>
38 #include <linux/version.h>
39 #include <linux/types.h>
40 #include <linux/errno.h>
41 #include <linux/ioport.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/kernel.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
46 #include <linux/skbuff.h>
47 #include <linux/init.h>
48 #include <linux/delay.h>
49 #include <linux/mm.h>
50 #include <linux/ethtool.h>
51 #include <linux/proc_fs.h>
52 #include <asm/semaphore.h>
53 #include <asm/hvcall.h>
54 #include <asm/atomic.h>
55 #include <asm/iommu.h>
56 #include <asm/vio.h>
57 #include <asm/uaccess.h>
58 #include <linux/seq_file.h>
59
60 #include "ibmveth.h"
61
62 #define DEBUG 1
63
64 #define ibmveth_printk(fmt, args...) \
65   printk(KERN_INFO "%s: " fmt, __FILE__, ## args)
66
67 #define ibmveth_error_printk(fmt, args...) \
68   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
69
70 #ifdef DEBUG
71 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
72   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
73 #define ibmveth_debug_printk(fmt, args...) \
74   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
75 #define ibmveth_assert(expr) \
76   if(!(expr)) {                                   \
77     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
78     BUG(); \
79   }
80 #else
81 #define ibmveth_debug_printk_no_adapter(fmt, args...)
82 #define ibmveth_debug_printk(fmt, args...)
83 #define ibmveth_assert(expr) 
84 #endif
85
86 static int ibmveth_open(struct net_device *dev);
87 static int ibmveth_close(struct net_device *dev);
88 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
89 static int ibmveth_poll(struct net_device *dev, int *budget);
90 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
91 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
92 static void ibmveth_set_multicast_list(struct net_device *dev);
93 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
94 static void ibmveth_proc_register_driver(void);
95 static void ibmveth_proc_unregister_driver(void);
96 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
97 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
98 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
99 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter*);
100
101 #ifdef CONFIG_PROC_FS
102 #define IBMVETH_PROC_DIR "ibmveth"
103 static struct proc_dir_entry *ibmveth_proc_dir;
104 #endif
105
106 static const char ibmveth_driver_name[] = "ibmveth";
107 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
108 #define ibmveth_driver_version "1.03"
109
110 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
111 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
112 MODULE_LICENSE("GPL");
113 MODULE_VERSION(ibmveth_driver_version);
114
115 /* simple methods of getting data from the current rxq entry */
116 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
117 {
118         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
119 }
120
121 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
122 {
123         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
124 }
125
126 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
127 {
128         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
129 }
130
131 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
132 {
133         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
134 }
135
136 /* setup the initial settings for a buffer pool */
137 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size)
138 {
139         pool->size = pool_size;
140         pool->index = pool_index;
141         pool->buff_size = buff_size;
142         pool->threshold = pool_size / 2;
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                 index = pool->free_map[free_index];
217         
218                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
219                 ibmveth_assert(pool->skbuff[index] == NULL);
220
221                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
222                                 pool->buff_size, DMA_FROM_DEVICE);
223
224                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
225                 pool->dma_addr[index] = dma_addr;
226                 pool->skbuff[index] = skb;
227
228                 correlator = ((u64)pool->index << 32) | index;
229                 *(u64*)skb->data = correlator;
230
231                 desc.desc = 0;
232                 desc.fields.valid = 1;
233                 desc.fields.length = pool->buff_size;
234                 desc.fields.address = dma_addr; 
235
236                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
237                     
238                 if(lpar_rc != H_Success) {
239                         pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
240                         pool->skbuff[index] = NULL;
241                         pool->consumer_index--;
242                         dma_unmap_single(&adapter->vdev->dev,
243                                         pool->dma_addr[index], pool->buff_size,
244                                         DMA_FROM_DEVICE);
245                         dev_kfree_skb_any(skb);
246                         adapter->replenish_add_buff_failure++;
247                         break;
248                 } else {
249                         buffers_added++;
250                         adapter->replenish_add_buff_success++;
251                 }
252         }
253     
254         mb();
255         atomic_add(buffers_added, &(pool->available));
256 }
257
258 /* check if replenishing is needed.  */
259 static inline int ibmveth_is_replenishing_needed(struct ibmveth_adapter *adapter)
260 {
261         return ((atomic_read(&adapter->rx_buff_pool[0].available) < adapter->rx_buff_pool[0].threshold) ||
262                 (atomic_read(&adapter->rx_buff_pool[1].available) < adapter->rx_buff_pool[1].threshold) ||
263                 (atomic_read(&adapter->rx_buff_pool[2].available) < adapter->rx_buff_pool[2].threshold));
264 }
265
266 /* kick the replenish tasklet if we need replenishing and it isn't already running */
267 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter *adapter)
268 {
269         if(ibmveth_is_replenishing_needed(adapter) &&
270            (atomic_dec_if_positive(&adapter->not_replenishing) == 0)) {
271                 schedule_work(&adapter->replenish_task);
272         }
273 }
274
275 /* replenish tasklet routine */
276 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) 
277 {
278         adapter->replenish_task_cycles++;
279
280         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
281         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
282         ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
283
284         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
285
286         atomic_inc(&adapter->not_replenishing);
287
288         ibmveth_schedule_replenishing(adapter);
289 }
290
291 /* empty and free ana buffer pool - also used to do cleanup in error paths */
292 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
293 {
294         int i;
295
296         if(pool->free_map) {
297                 kfree(pool->free_map);
298                 pool->free_map  = NULL;
299         }
300
301         if(pool->skbuff && pool->dma_addr) {
302                 for(i = 0; i < pool->size; ++i) {
303                         struct sk_buff *skb = pool->skbuff[i];
304                         if(skb) {
305                                 dma_unmap_single(&adapter->vdev->dev,
306                                                  pool->dma_addr[i],
307                                                  pool->buff_size,
308                                                  DMA_FROM_DEVICE);
309                                 dev_kfree_skb_any(skb);
310                                 pool->skbuff[i] = NULL;
311                         }
312                 }
313         }
314
315         if(pool->dma_addr) {
316                 kfree(pool->dma_addr);
317                 pool->dma_addr = NULL;
318         }
319
320         if(pool->skbuff) {
321                 kfree(pool->skbuff);
322                 pool->skbuff = NULL;
323         }
324 }
325
326 /* remove a buffer from a pool */
327 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
328 {
329         unsigned int pool  = correlator >> 32;
330         unsigned int index = correlator & 0xffffffffUL;
331         unsigned int free_index;
332         struct sk_buff *skb;
333
334         ibmveth_assert(pool < IbmVethNumBufferPools);
335         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
336
337         skb = adapter->rx_buff_pool[pool].skbuff[index];
338
339         ibmveth_assert(skb != NULL);
340
341         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
342
343         dma_unmap_single(&adapter->vdev->dev,
344                          adapter->rx_buff_pool[pool].dma_addr[index],
345                          adapter->rx_buff_pool[pool].buff_size,
346                          DMA_FROM_DEVICE);
347
348         free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
349         adapter->rx_buff_pool[pool].free_map[free_index] = index;
350
351         mb();
352
353         atomic_dec(&(adapter->rx_buff_pool[pool].available));
354 }
355
356 /* get the current buffer on the rx queue */
357 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
358 {
359         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
360         unsigned int pool = correlator >> 32;
361         unsigned int index = correlator & 0xffffffffUL;
362
363         ibmveth_assert(pool < IbmVethNumBufferPools);
364         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
365
366         return adapter->rx_buff_pool[pool].skbuff[index];
367 }
368
369 /* recycle the current buffer on the rx queue */
370 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
371 {
372         u32 q_index = adapter->rx_queue.index;
373         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
374         unsigned int pool = correlator >> 32;
375         unsigned int index = correlator & 0xffffffffUL;
376         union ibmveth_buf_desc desc;
377         unsigned long lpar_rc;
378
379         ibmveth_assert(pool < IbmVethNumBufferPools);
380         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
381
382         desc.desc = 0;
383         desc.fields.valid = 1;
384         desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
385         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
386
387         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
388                     
389         if(lpar_rc != H_Success) {
390                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
391                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
392         }
393
394         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
395                 adapter->rx_queue.index = 0;
396                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
397         }
398 }
399
400 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
401 {
402         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
403
404         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
405                 adapter->rx_queue.index = 0;
406                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
407         }
408 }
409
410 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
411 {
412         if(adapter->buffer_list_addr != NULL) {
413                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
414                         dma_unmap_single(&adapter->vdev->dev,
415                                         adapter->buffer_list_dma, 4096,
416                                         DMA_BIDIRECTIONAL);
417                         adapter->buffer_list_dma = DMA_ERROR_CODE;
418                 }
419                 free_page((unsigned long)adapter->buffer_list_addr);
420                 adapter->buffer_list_addr = NULL;
421         } 
422
423         if(adapter->filter_list_addr != NULL) {
424                 if(!dma_mapping_error(adapter->filter_list_dma)) {
425                         dma_unmap_single(&adapter->vdev->dev,
426                                         adapter->filter_list_dma, 4096,
427                                         DMA_BIDIRECTIONAL);
428                         adapter->filter_list_dma = DMA_ERROR_CODE;
429                 }
430                 free_page((unsigned long)adapter->filter_list_addr);
431                 adapter->filter_list_addr = NULL;
432         }
433
434         if(adapter->rx_queue.queue_addr != NULL) {
435                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
436                         dma_unmap_single(&adapter->vdev->dev,
437                                         adapter->rx_queue.queue_dma,
438                                         adapter->rx_queue.queue_len,
439                                         DMA_BIDIRECTIONAL);
440                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
441                 }
442                 kfree(adapter->rx_queue.queue_addr);
443                 adapter->rx_queue.queue_addr = NULL;
444         }
445
446         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
447         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
448         ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
449 }
450
451 static int ibmveth_open(struct net_device *netdev)
452 {
453         struct ibmveth_adapter *adapter = netdev->priv;
454         u64 mac_address = 0;
455         int rxq_entries;
456         unsigned long lpar_rc;
457         int rc;
458         union ibmveth_buf_desc rxq_desc;
459
460         ibmveth_debug_printk("open starting\n");
461
462         rxq_entries =
463                 adapter->rx_buff_pool[0].size +
464                 adapter->rx_buff_pool[1].size +
465                 adapter->rx_buff_pool[2].size + 1;
466     
467         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
468         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
469  
470         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
471                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
472                 ibmveth_cleanup(adapter);
473                 return -ENOMEM;
474         }
475
476         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
477         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
478
479         if(!adapter->rx_queue.queue_addr) {
480                 ibmveth_error_printk("unable to allocate rx queue pages\n");
481                 ibmveth_cleanup(adapter);
482                 return -ENOMEM;
483         }
484
485         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
486                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
487         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
488                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
489         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
490                         adapter->rx_queue.queue_addr,
491                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
492
493         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
494            (dma_mapping_error(adapter->filter_list_dma)) ||
495            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
496                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
497                 ibmveth_cleanup(adapter);
498                 return -ENOMEM;
499         }
500
501         adapter->rx_queue.index = 0;
502         adapter->rx_queue.num_slots = rxq_entries;
503         adapter->rx_queue.toggle = 1;
504
505         if(ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[0]) ||
506            ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[1]) ||
507            ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[2]))
508         {
509                 ibmveth_error_printk("unable to allocate buffer pools\n");
510                 ibmveth_cleanup(adapter);
511                 return -ENOMEM;
512         }
513
514         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
515         mac_address = mac_address >> 16;
516
517         rxq_desc.desc = 0;
518         rxq_desc.fields.valid = 1;
519         rxq_desc.fields.length = adapter->rx_queue.queue_len;
520         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
521
522         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
523         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
524         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
525
526     
527         lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
528                                          adapter->buffer_list_dma,
529                                          rxq_desc.desc,
530                                          adapter->filter_list_dma,
531                                          mac_address);
532
533         if(lpar_rc != H_Success) {
534                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
535                 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
536                                      adapter->buffer_list_dma,
537                                      adapter->filter_list_dma,
538                                      rxq_desc.desc,
539                                      mac_address);
540                 ibmveth_cleanup(adapter);
541                 return -ENONET; 
542         }
543
544         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
545         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
546                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
547                 do {
548                         rc = h_free_logical_lan(adapter->vdev->unit_address);
549                 } while (H_isLongBusy(rc) || (rc == H_Busy));
550
551                 ibmveth_cleanup(adapter);
552                 return rc;
553         }
554
555         netif_start_queue(netdev);
556
557         ibmveth_debug_printk("scheduling initial replenish cycle\n");
558         ibmveth_schedule_replenishing(adapter);
559
560         ibmveth_debug_printk("open complete\n");
561
562         return 0;
563 }
564
565 static int ibmveth_close(struct net_device *netdev)
566 {
567         struct ibmveth_adapter *adapter = netdev->priv;
568         long lpar_rc;
569     
570         ibmveth_debug_printk("close starting\n");
571
572         netif_stop_queue(netdev);
573
574         free_irq(netdev->irq, netdev);
575
576         cancel_delayed_work(&adapter->replenish_task);
577         flush_scheduled_work();
578
579         do {
580                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
581         } while (H_isLongBusy(lpar_rc) || (lpar_rc == H_Busy));
582
583         if(lpar_rc != H_Success)
584         {
585                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
586                                      lpar_rc);
587         }
588
589         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
590
591         ibmveth_cleanup(adapter);
592
593         ibmveth_debug_printk("close complete\n");
594
595         return 0;
596 }
597
598 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
599         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
600         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
601         cmd->speed = SPEED_1000;
602         cmd->duplex = DUPLEX_FULL;
603         cmd->port = PORT_FIBRE;
604         cmd->phy_address = 0;
605         cmd->transceiver = XCVR_INTERNAL;
606         cmd->autoneg = AUTONEG_ENABLE;
607         cmd->maxtxpkt = 0;
608         cmd->maxrxpkt = 1;
609         return 0;
610 }
611
612 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
613         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
614         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
615 }
616
617 static u32 netdev_get_link(struct net_device *dev) {
618         return 1;
619 }
620
621 static struct ethtool_ops netdev_ethtool_ops = {
622         .get_drvinfo            = netdev_get_drvinfo,
623         .get_settings           = netdev_get_settings,
624         .get_link               = netdev_get_link,
625         .get_sg                 = ethtool_op_get_sg,
626         .get_tx_csum            = ethtool_op_get_tx_csum,
627 };
628
629 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
630 {
631         return -EOPNOTSUPP;
632 }
633
634 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
635
636 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
637 {
638         struct ibmveth_adapter *adapter = netdev->priv;
639         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
640         unsigned long lpar_rc;
641         int nfrags = 0, curfrag;
642         unsigned long correlator;
643         unsigned int retry_count;
644
645         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
646                 adapter->stats.tx_dropped++;
647                 dev_kfree_skb(skb);
648                 return 0;
649         }
650
651         memset(&desc, 0, sizeof(desc));
652
653         /* nfrags = number of frags after the initial fragment */
654         nfrags = skb_shinfo(skb)->nr_frags;
655
656         if(nfrags)
657                 adapter->tx_multidesc_send++;
658
659         /* map the initial fragment */
660         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
661         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
662                                         desc[0].fields.length, DMA_TO_DEVICE);
663         desc[0].fields.valid   = 1;
664
665         if(dma_mapping_error(desc[0].fields.address)) {
666                 ibmveth_error_printk("tx: unable to map initial fragment\n");
667                 adapter->tx_map_failed++;
668                 adapter->stats.tx_dropped++;
669                 dev_kfree_skb(skb);
670                 return 0;
671         }
672
673         curfrag = nfrags;
674
675         /* map fragments past the initial portion if there are any */
676         while(curfrag--) {
677                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
678                 desc[curfrag+1].fields.address
679                         = dma_map_single(&adapter->vdev->dev,
680                                 page_address(frag->page) + frag->page_offset,
681                                 frag->size, DMA_TO_DEVICE);
682                 desc[curfrag+1].fields.length = frag->size;
683                 desc[curfrag+1].fields.valid  = 1;
684
685                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
686                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
687                         adapter->tx_map_failed++;
688                         adapter->stats.tx_dropped++;
689                         /* Free all the mappings we just created */
690                         while(curfrag < nfrags) {
691                                 dma_unmap_single(&adapter->vdev->dev,
692                                                  desc[curfrag+1].fields.address,
693                                                  desc[curfrag+1].fields.length,
694                                                  DMA_TO_DEVICE);
695                                 curfrag++;
696                         }
697                         dev_kfree_skb(skb);
698                         return 0;
699                 }
700         }
701
702         /* send the frame. Arbitrarily set retrycount to 1024 */
703         correlator = 0;
704         retry_count = 1024;
705         do {
706                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
707                                              desc[0].desc,
708                                              desc[1].desc,
709                                              desc[2].desc,
710                                              desc[3].desc,
711                                              desc[4].desc,
712                                              desc[5].desc,
713                                              correlator);
714         } while ((lpar_rc == H_Busy) && (retry_count--));
715     
716         if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
717                 int i;
718                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
719                 for(i = 0; i < 6; i++) {
720                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
721                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
722                 }
723                 adapter->tx_send_failed++;
724                 adapter->stats.tx_dropped++;
725         } else {
726                 adapter->stats.tx_packets++;
727                 adapter->stats.tx_bytes += skb->len;
728         }
729
730         do {
731                 dma_unmap_single(&adapter->vdev->dev,
732                                 desc[nfrags].fields.address,
733                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
734         } while(--nfrags >= 0);
735
736         dev_kfree_skb(skb);
737         return 0;
738 }
739
740 static int ibmveth_poll(struct net_device *netdev, int *budget)
741 {
742         struct ibmveth_adapter *adapter = netdev->priv;
743         int max_frames_to_process = netdev->quota;
744         int frames_processed = 0;
745         int more_work = 1;
746         unsigned long lpar_rc;
747
748  restart_poll:
749         do {
750                 struct net_device *netdev = adapter->netdev;
751
752                 if(ibmveth_rxq_pending_buffer(adapter)) {
753                         struct sk_buff *skb;
754
755                         rmb();
756
757                         if(!ibmveth_rxq_buffer_valid(adapter)) {
758                                 wmb(); /* suggested by larson1 */
759                                 adapter->rx_invalid_buffer++;
760                                 ibmveth_debug_printk("recycling invalid buffer\n");
761                                 ibmveth_rxq_recycle_buffer(adapter);
762                         } else {
763                                 int length = ibmveth_rxq_frame_length(adapter);
764                                 int offset = ibmveth_rxq_frame_offset(adapter);
765                                 skb = ibmveth_rxq_get_buffer(adapter);
766
767                                 ibmveth_rxq_harvest_buffer(adapter);
768
769                                 skb_reserve(skb, offset);
770                                 skb_put(skb, length);
771                                 skb->dev = netdev;
772                                 skb->protocol = eth_type_trans(skb, netdev);
773
774                                 netif_receive_skb(skb); /* send it up */
775
776                                 adapter->stats.rx_packets++;
777                                 adapter->stats.rx_bytes += length;
778                                 frames_processed++;
779                         }
780                 } else {
781                         more_work = 0;
782                 }
783         } while(more_work && (frames_processed < max_frames_to_process));
784
785         ibmveth_schedule_replenishing(adapter);
786
787         if(more_work) {
788                 /* more work to do - return that we are not done yet */
789                 netdev->quota -= frames_processed;
790                 *budget -= frames_processed;
791                 return 1; 
792         }
793
794         /* we think we are done - reenable interrupts, then check once more to make sure we are done */
795         lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
796
797         ibmveth_assert(lpar_rc == H_Success);
798
799         netif_rx_complete(netdev);
800
801         if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
802         {
803                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
804                 ibmveth_assert(lpar_rc == H_Success);
805                 more_work = 1;
806                 goto restart_poll;
807         }
808
809         netdev->quota -= frames_processed;
810         *budget -= frames_processed;
811
812         /* we really are done */
813         return 0;
814 }
815
816 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
817 {   
818         struct net_device *netdev = dev_instance;
819         struct ibmveth_adapter *adapter = netdev->priv;
820         unsigned long lpar_rc;
821
822         if(netif_rx_schedule_prep(netdev)) {
823                 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
824                 ibmveth_assert(lpar_rc == H_Success);
825                 __netif_rx_schedule(netdev);
826         }
827         return IRQ_HANDLED;
828 }
829
830 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
831 {
832         struct ibmveth_adapter *adapter = dev->priv;
833         return &adapter->stats;
834 }
835
836 static void ibmveth_set_multicast_list(struct net_device *netdev)
837 {
838         struct ibmveth_adapter *adapter = netdev->priv;
839         unsigned long lpar_rc;
840
841         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
842                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
843                                            IbmVethMcastEnableRecv |
844                                            IbmVethMcastDisableFiltering,
845                                            0);
846                 if(lpar_rc != H_Success) {
847                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
848                 }
849         } else {
850                 struct dev_mc_list *mclist = netdev->mc_list;
851                 int i;
852                 /* clear the filter table & disable filtering */
853                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
854                                            IbmVethMcastEnableRecv |
855                                            IbmVethMcastDisableFiltering |
856                                            IbmVethMcastClearFilterTable,
857                                            0);
858                 if(lpar_rc != H_Success) {
859                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
860                 }
861                 /* add the addresses to the filter table */
862                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
863                         // add the multicast address to the filter table
864                         unsigned long mcast_addr = 0;
865                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
866                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
867                                                    IbmVethMcastAddFilter,
868                                                    mcast_addr);
869                         if(lpar_rc != H_Success) {
870                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
871                         }
872                 }
873         
874                 /* re-enable filtering */
875                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
876                                            IbmVethMcastEnableFiltering,
877                                            0);
878                 if(lpar_rc != H_Success) {
879                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
880                 }
881         }
882 }
883
884 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
885 {
886         if ((new_mtu < 68) || (new_mtu > (1<<20)))
887                 return -EINVAL;
888         dev->mtu = new_mtu;
889         return 0;       
890 }
891
892 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
893 {
894         int rc;
895         struct net_device *netdev;
896         struct ibmveth_adapter *adapter;
897
898         unsigned char *mac_addr_p;
899         unsigned int *mcastFilterSize_p;
900
901
902         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", 
903                                         dev->unit_address);
904
905         mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
906         if(!mac_addr_p) {
907                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
908                                 "attribute\n", __FILE__, __LINE__);
909                 return 0;
910         }
911         
912         mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
913         if(!mcastFilterSize_p) {
914                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
915                                 "VETH_MCAST_FILTER_SIZE attribute\n",
916                                 __FILE__, __LINE__);
917                 return 0;
918         }
919         
920         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
921
922         if(!netdev)
923                 return -ENOMEM;
924
925         SET_MODULE_OWNER(netdev);
926
927         adapter = netdev->priv;
928         memset(adapter, 0, sizeof(adapter));
929         dev->dev.driver_data = netdev;
930
931         adapter->vdev = dev;
932         adapter->netdev = netdev;
933         adapter->mcastFilterSize= *mcastFilterSize_p;
934         
935         /*      Some older boxes running PHYP non-natively have an OF that
936                 returns a 8-byte local-mac-address field (and the first 
937                 2 bytes have to be ignored) while newer boxes' OF return
938                 a 6-byte field. Note that IEEE 1275 specifies that 
939                 local-mac-address must be a 6-byte field.
940                 The RPA doc specifies that the first byte must be 10b, so 
941                 we'll just look for it to solve this 8 vs. 6 byte field issue */
942
943         if ((*mac_addr_p & 0x3) != 0x02)
944                 mac_addr_p += 2;
945
946         adapter->mac_addr = 0;
947         memcpy(&adapter->mac_addr, mac_addr_p, 6);
948
949         adapter->liobn = dev->iommu_table->it_index;
950         
951         netdev->irq = dev->irq;
952         netdev->open               = ibmveth_open;
953         netdev->poll               = ibmveth_poll;
954         netdev->weight             = 16;
955         netdev->stop               = ibmveth_close;
956         netdev->hard_start_xmit    = ibmveth_start_xmit;
957         netdev->get_stats          = ibmveth_get_stats;
958         netdev->set_multicast_list = ibmveth_set_multicast_list;
959         netdev->do_ioctl           = ibmveth_ioctl;
960         netdev->ethtool_ops           = &netdev_ethtool_ops;
961         netdev->change_mtu         = ibmveth_change_mtu;
962         SET_NETDEV_DEV(netdev, &dev->dev);
963
964         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
965
966         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[0], 0, IbmVethPool0DftCnt, IbmVethPool0DftSize);
967         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[1], 1, IbmVethPool1DftCnt, IbmVethPool1DftSize);
968         ibmveth_init_buffer_pool(&adapter->rx_buff_pool[2], 2, IbmVethPool2DftCnt, IbmVethPool2DftSize);
969
970         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
971
972         INIT_WORK(&adapter->replenish_task, (void*)ibmveth_replenish_task, (void*)adapter);
973
974         adapter->buffer_list_dma = DMA_ERROR_CODE;
975         adapter->filter_list_dma = DMA_ERROR_CODE;
976         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
977
978         atomic_set(&adapter->not_replenishing, 1);
979
980         ibmveth_debug_printk("registering netdev...\n");
981
982         rc = register_netdev(netdev);
983
984         if(rc) {
985                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
986                 free_netdev(netdev);
987                 return rc;
988         }
989
990         ibmveth_debug_printk("registered\n");
991
992         ibmveth_proc_register_adapter(adapter);
993
994         return 0;
995 }
996
997 static int __devexit ibmveth_remove(struct vio_dev *dev)
998 {
999         struct net_device *netdev = dev->dev.driver_data;
1000         struct ibmveth_adapter *adapter = netdev->priv;
1001
1002         unregister_netdev(netdev);
1003
1004         ibmveth_proc_unregister_adapter(adapter);
1005
1006         free_netdev(netdev);
1007         return 0;
1008 }
1009
1010 #ifdef CONFIG_PROC_FS
1011 static void ibmveth_proc_register_driver(void)
1012 {
1013         ibmveth_proc_dir = create_proc_entry(IBMVETH_PROC_DIR, S_IFDIR, proc_net);
1014         if (ibmveth_proc_dir) {
1015                 SET_MODULE_OWNER(ibmveth_proc_dir);
1016         }
1017 }
1018
1019 static void ibmveth_proc_unregister_driver(void)
1020 {
1021         remove_proc_entry(IBMVETH_PROC_DIR, proc_net);
1022 }
1023
1024 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) 
1025 {
1026         if (*pos == 0) {
1027                 return (void *)1;
1028         } else {
1029                 return NULL;
1030         }
1031 }
1032
1033 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1034 {
1035         ++*pos;
1036         return NULL;
1037 }
1038
1039 static void ibmveth_seq_stop(struct seq_file *seq, void *v) 
1040 {
1041 }
1042
1043 static int ibmveth_seq_show(struct seq_file *seq, void *v) 
1044 {
1045         struct ibmveth_adapter *adapter = seq->private;
1046         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1047         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1048
1049         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1050         
1051         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1052         seq_printf(seq, "LIOBN:           0x%lx\n", adapter->liobn);
1053         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1054                    current_mac[0], current_mac[1], current_mac[2],
1055                    current_mac[3], current_mac[4], current_mac[5]);
1056         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1057                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1058                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1059         
1060         seq_printf(seq, "\nAdapter Statistics:\n");
1061         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1062         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1063         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1064         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1065         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1066         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1067         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1068         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1069         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1070         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1071         
1072         return 0;
1073 }
1074 static struct seq_operations ibmveth_seq_ops = {
1075         .start = ibmveth_seq_start,
1076         .next  = ibmveth_seq_next,
1077         .stop  = ibmveth_seq_stop,
1078         .show  = ibmveth_seq_show,
1079 };
1080
1081 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1082 {
1083         struct seq_file *seq;
1084         struct proc_dir_entry *proc;
1085         int rc;
1086
1087         rc = seq_open(file, &ibmveth_seq_ops);
1088         if (!rc) {
1089                 /* recover the pointer buried in proc_dir_entry data */
1090                 seq = file->private_data;
1091                 proc = PDE(inode);
1092                 seq->private = proc->data;
1093         }
1094         return rc;
1095 }
1096
1097 static struct file_operations ibmveth_proc_fops = {
1098         .owner   = THIS_MODULE,
1099         .open    = ibmveth_proc_open,
1100         .read    = seq_read,
1101         .llseek  = seq_lseek,
1102         .release = seq_release,
1103 };
1104
1105 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1106 {
1107         struct proc_dir_entry *entry;
1108         if (ibmveth_proc_dir) {
1109                 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1110                 if (!entry) {
1111                         ibmveth_error_printk("Cannot create adapter proc entry");
1112                 } else {
1113                         entry->data = (void *) adapter;
1114                         entry->proc_fops = &ibmveth_proc_fops;
1115                         SET_MODULE_OWNER(entry);
1116                 }
1117         }
1118         return;
1119 }
1120
1121 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1122 {
1123         if (ibmveth_proc_dir) {
1124                 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1125         }
1126 }
1127
1128 #else /* CONFIG_PROC_FS */
1129 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) 
1130 {
1131 }
1132
1133 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) 
1134 {
1135 }
1136 static void ibmveth_proc_register_driver(void)
1137 {
1138 }
1139
1140 static void ibmveth_proc_unregister_driver(void)
1141 {
1142 }
1143 #endif /* CONFIG_PROC_FS */
1144
1145 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1146         { "network", "IBM,l-lan"},
1147         { "", "" }
1148 };
1149
1150 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1151
1152 static struct vio_driver ibmveth_driver = {
1153         .name        = (char *)ibmveth_driver_name,
1154         .id_table    = ibmveth_device_table,
1155         .probe       = ibmveth_probe,
1156         .remove      = ibmveth_remove
1157 };
1158
1159 static int __init ibmveth_module_init(void)
1160 {
1161         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1162
1163         ibmveth_proc_register_driver();
1164
1165         return vio_register_driver(&ibmveth_driver);
1166 }
1167
1168 static void __exit ibmveth_module_exit(void)
1169 {
1170         vio_unregister_driver(&ibmveth_driver);
1171         ibmveth_proc_unregister_driver();
1172 }       
1173
1174 module_init(ibmveth_module_init);
1175 module_exit(ibmveth_module_exit);