ibmveth: Implement ethtool hooks to enable/disable checksum offload
[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/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 <linux/in.h>
51 #include <linux/ip.h>
52 #include <net/net_namespace.h>
53 #include <asm/semaphore.h>
54 #include <asm/hvcall.h>
55 #include <asm/atomic.h>
56 #include <asm/vio.h>
57 #include <asm/uaccess.h>
58 #include <linux/seq_file.h>
59
60 #include "ibmveth.h"
61
62 #undef DEBUG
63
64 #define ibmveth_printk(fmt, args...) \
65   printk(KERN_DEBUG "%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 napi_struct *napi, 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);
99 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
100 static struct kobj_type ktype_veth_pool;
101
102 #ifdef CONFIG_PROC_FS
103 #define IBMVETH_PROC_DIR "ibmveth"
104 static struct proc_dir_entry *ibmveth_proc_dir;
105 #endif
106
107 static const char ibmveth_driver_name[] = "ibmveth";
108 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
109 #define ibmveth_driver_version "1.03"
110
111 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
112 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
113 MODULE_LICENSE("GPL");
114 MODULE_VERSION(ibmveth_driver_version);
115
116 /* simple methods of getting data from the current rxq entry */
117 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
118 {
119         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
120 }
121
122 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
123 {
124         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
125 }
126
127 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
128 {
129         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
130 }
131
132 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
133 {
134         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
135 }
136
137 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
138 {
139         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].csum_good);
140 }
141
142 /* setup the initial settings for a buffer pool */
143 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
144 {
145         pool->size = pool_size;
146         pool->index = pool_index;
147         pool->buff_size = buff_size;
148         pool->threshold = pool_size / 2;
149         pool->active = pool_active;
150 }
151
152 /* allocate and setup an buffer pool - called during open */
153 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
154 {
155         int i;
156
157         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
158
159         if(!pool->free_map) {
160                 return -1;
161         }
162
163         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
164         if(!pool->dma_addr) {
165                 kfree(pool->free_map);
166                 pool->free_map = NULL;
167                 return -1;
168         }
169
170         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
171
172         if(!pool->skbuff) {
173                 kfree(pool->dma_addr);
174                 pool->dma_addr = NULL;
175
176                 kfree(pool->free_map);
177                 pool->free_map = NULL;
178                 return -1;
179         }
180
181         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
182         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
183
184         for(i = 0; i < pool->size; ++i) {
185                 pool->free_map[i] = i;
186         }
187
188         atomic_set(&pool->available, 0);
189         pool->producer_index = 0;
190         pool->consumer_index = 0;
191
192         return 0;
193 }
194
195 /* replenish the buffers for a pool.  note that we don't need to
196  * skb_reserve these since they are used for incoming...
197  */
198 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
199 {
200         u32 i;
201         u32 count = pool->size - atomic_read(&pool->available);
202         u32 buffers_added = 0;
203
204         mb();
205
206         for(i = 0; i < count; ++i) {
207                 struct sk_buff *skb;
208                 unsigned int free_index, index;
209                 u64 correlator;
210                 union ibmveth_buf_desc desc;
211                 unsigned long lpar_rc;
212                 dma_addr_t dma_addr;
213
214                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
215
216                 if(!skb) {
217                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
218                         adapter->replenish_no_mem++;
219                         break;
220                 }
221
222                 free_index = pool->consumer_index;
223                 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
224                 index = pool->free_map[free_index];
225
226                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
227                 ibmveth_assert(pool->skbuff[index] == NULL);
228
229                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
230                                 pool->buff_size, DMA_FROM_DEVICE);
231
232                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
233                 pool->dma_addr[index] = dma_addr;
234                 pool->skbuff[index] = skb;
235
236                 correlator = ((u64)pool->index << 32) | index;
237                 *(u64*)skb->data = correlator;
238
239                 desc.desc = 0;
240                 desc.fields.valid = 1;
241                 desc.fields.length = pool->buff_size;
242                 desc.fields.address = dma_addr;
243
244                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
245
246                 if(lpar_rc != H_SUCCESS) {
247                         pool->free_map[free_index] = index;
248                         pool->skbuff[index] = NULL;
249                         if (pool->consumer_index == 0)
250                                 pool->consumer_index = pool->size - 1;
251                         else
252                                 pool->consumer_index--;
253                         dma_unmap_single(&adapter->vdev->dev,
254                                         pool->dma_addr[index], pool->buff_size,
255                                         DMA_FROM_DEVICE);
256                         dev_kfree_skb_any(skb);
257                         adapter->replenish_add_buff_failure++;
258                         break;
259                 } else {
260                         buffers_added++;
261                         adapter->replenish_add_buff_success++;
262                 }
263         }
264
265         mb();
266         atomic_add(buffers_added, &(pool->available));
267 }
268
269 /* replenish routine */
270 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
271 {
272         int i;
273
274         adapter->replenish_task_cycles++;
275
276         for(i = 0; i < IbmVethNumBufferPools; i++)
277                 if(adapter->rx_buff_pool[i].active)
278                         ibmveth_replenish_buffer_pool(adapter,
279                                                      &adapter->rx_buff_pool[i]);
280
281         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
282 }
283
284 /* empty and free ana buffer pool - also used to do cleanup in error paths */
285 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
286 {
287         int i;
288
289         kfree(pool->free_map);
290         pool->free_map = NULL;
291
292         if(pool->skbuff && pool->dma_addr) {
293                 for(i = 0; i < pool->size; ++i) {
294                         struct sk_buff *skb = pool->skbuff[i];
295                         if(skb) {
296                                 dma_unmap_single(&adapter->vdev->dev,
297                                                  pool->dma_addr[i],
298                                                  pool->buff_size,
299                                                  DMA_FROM_DEVICE);
300                                 dev_kfree_skb_any(skb);
301                                 pool->skbuff[i] = NULL;
302                         }
303                 }
304         }
305
306         if(pool->dma_addr) {
307                 kfree(pool->dma_addr);
308                 pool->dma_addr = NULL;
309         }
310
311         if(pool->skbuff) {
312                 kfree(pool->skbuff);
313                 pool->skbuff = NULL;
314         }
315 }
316
317 /* remove a buffer from a pool */
318 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
319 {
320         unsigned int pool  = correlator >> 32;
321         unsigned int index = correlator & 0xffffffffUL;
322         unsigned int free_index;
323         struct sk_buff *skb;
324
325         ibmveth_assert(pool < IbmVethNumBufferPools);
326         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
327
328         skb = adapter->rx_buff_pool[pool].skbuff[index];
329
330         ibmveth_assert(skb != NULL);
331
332         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
333
334         dma_unmap_single(&adapter->vdev->dev,
335                          adapter->rx_buff_pool[pool].dma_addr[index],
336                          adapter->rx_buff_pool[pool].buff_size,
337                          DMA_FROM_DEVICE);
338
339         free_index = adapter->rx_buff_pool[pool].producer_index;
340         adapter->rx_buff_pool[pool].producer_index
341                 = (adapter->rx_buff_pool[pool].producer_index + 1)
342                 % adapter->rx_buff_pool[pool].size;
343         adapter->rx_buff_pool[pool].free_map[free_index] = index;
344
345         mb();
346
347         atomic_dec(&(adapter->rx_buff_pool[pool].available));
348 }
349
350 /* get the current buffer on the rx queue */
351 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
352 {
353         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
354         unsigned int pool = correlator >> 32;
355         unsigned int index = correlator & 0xffffffffUL;
356
357         ibmveth_assert(pool < IbmVethNumBufferPools);
358         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
359
360         return adapter->rx_buff_pool[pool].skbuff[index];
361 }
362
363 /* recycle the current buffer on the rx queue */
364 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
365 {
366         u32 q_index = adapter->rx_queue.index;
367         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
368         unsigned int pool = correlator >> 32;
369         unsigned int index = correlator & 0xffffffffUL;
370         union ibmveth_buf_desc desc;
371         unsigned long lpar_rc;
372
373         ibmveth_assert(pool < IbmVethNumBufferPools);
374         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
375
376         if(!adapter->rx_buff_pool[pool].active) {
377                 ibmveth_rxq_harvest_buffer(adapter);
378                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
379                 return;
380         }
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 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         int i;
413
414         if(adapter->buffer_list_addr != NULL) {
415                 if(!dma_mapping_error(adapter->buffer_list_dma)) {
416                         dma_unmap_single(&adapter->vdev->dev,
417                                         adapter->buffer_list_dma, 4096,
418                                         DMA_BIDIRECTIONAL);
419                         adapter->buffer_list_dma = DMA_ERROR_CODE;
420                 }
421                 free_page((unsigned long)adapter->buffer_list_addr);
422                 adapter->buffer_list_addr = NULL;
423         }
424
425         if(adapter->filter_list_addr != NULL) {
426                 if(!dma_mapping_error(adapter->filter_list_dma)) {
427                         dma_unmap_single(&adapter->vdev->dev,
428                                         adapter->filter_list_dma, 4096,
429                                         DMA_BIDIRECTIONAL);
430                         adapter->filter_list_dma = DMA_ERROR_CODE;
431                 }
432                 free_page((unsigned long)adapter->filter_list_addr);
433                 adapter->filter_list_addr = NULL;
434         }
435
436         if(adapter->rx_queue.queue_addr != NULL) {
437                 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
438                         dma_unmap_single(&adapter->vdev->dev,
439                                         adapter->rx_queue.queue_dma,
440                                         adapter->rx_queue.queue_len,
441                                         DMA_BIDIRECTIONAL);
442                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
443                 }
444                 kfree(adapter->rx_queue.queue_addr);
445                 adapter->rx_queue.queue_addr = NULL;
446         }
447
448         for(i = 0; i<IbmVethNumBufferPools; i++)
449                 if (adapter->rx_buff_pool[i].active)
450                         ibmveth_free_buffer_pool(adapter,
451                                                  &adapter->rx_buff_pool[i]);
452 }
453
454 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
455         union ibmveth_buf_desc rxq_desc, u64 mac_address)
456 {
457         int rc, try_again = 1;
458
459         /* After a kexec the adapter will still be open, so our attempt to
460         * open it will fail. So if we get a failure we free the adapter and
461         * try again, but only once. */
462 retry:
463         rc = h_register_logical_lan(adapter->vdev->unit_address,
464                                     adapter->buffer_list_dma, rxq_desc.desc,
465                                     adapter->filter_list_dma, mac_address);
466
467         if (rc != H_SUCCESS && try_again) {
468                 do {
469                         rc = h_free_logical_lan(adapter->vdev->unit_address);
470                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
471
472                 try_again = 0;
473                 goto retry;
474         }
475
476         return rc;
477 }
478
479 static int ibmveth_open(struct net_device *netdev)
480 {
481         struct ibmveth_adapter *adapter = netdev->priv;
482         u64 mac_address = 0;
483         int rxq_entries = 1;
484         unsigned long lpar_rc;
485         int rc;
486         union ibmveth_buf_desc rxq_desc;
487         int i;
488
489         ibmveth_debug_printk("open starting\n");
490
491         napi_enable(&adapter->napi);
492
493         for(i = 0; i<IbmVethNumBufferPools; i++)
494                 rxq_entries += adapter->rx_buff_pool[i].size;
495
496         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
497         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
498
499         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
500                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
501                 ibmveth_cleanup(adapter);
502                 napi_disable(&adapter->napi);
503                 return -ENOMEM;
504         }
505
506         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
507         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
508
509         if(!adapter->rx_queue.queue_addr) {
510                 ibmveth_error_printk("unable to allocate rx queue pages\n");
511                 ibmveth_cleanup(adapter);
512                 napi_disable(&adapter->napi);
513                 return -ENOMEM;
514         }
515
516         adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
517                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
518         adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
519                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
520         adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
521                         adapter->rx_queue.queue_addr,
522                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
523
524         if((dma_mapping_error(adapter->buffer_list_dma) ) ||
525            (dma_mapping_error(adapter->filter_list_dma)) ||
526            (dma_mapping_error(adapter->rx_queue.queue_dma))) {
527                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
528                 ibmveth_cleanup(adapter);
529                 napi_disable(&adapter->napi);
530                 return -ENOMEM;
531         }
532
533         adapter->rx_queue.index = 0;
534         adapter->rx_queue.num_slots = rxq_entries;
535         adapter->rx_queue.toggle = 1;
536
537         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
538         mac_address = mac_address >> 16;
539
540         rxq_desc.desc = 0;
541         rxq_desc.fields.valid = 1;
542         rxq_desc.fields.length = adapter->rx_queue.queue_len;
543         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
544
545         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
546         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
547         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
548
549         h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
550
551         lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
552
553         if(lpar_rc != H_SUCCESS) {
554                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
555                 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
556                                      adapter->buffer_list_dma,
557                                      adapter->filter_list_dma,
558                                      rxq_desc.desc,
559                                      mac_address);
560                 ibmveth_cleanup(adapter);
561                 napi_disable(&adapter->napi);
562                 return -ENONET;
563         }
564
565         for(i = 0; i<IbmVethNumBufferPools; i++) {
566                 if(!adapter->rx_buff_pool[i].active)
567                         continue;
568                 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
569                         ibmveth_error_printk("unable to alloc pool\n");
570                         adapter->rx_buff_pool[i].active = 0;
571                         ibmveth_cleanup(adapter);
572                         napi_disable(&adapter->napi);
573                         return -ENOMEM ;
574                 }
575         }
576
577         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
578         if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
579                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
580                 do {
581                         rc = h_free_logical_lan(adapter->vdev->unit_address);
582                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
583
584                 ibmveth_cleanup(adapter);
585                 napi_disable(&adapter->napi);
586                 return rc;
587         }
588
589         ibmveth_debug_printk("initial replenish cycle\n");
590         ibmveth_interrupt(netdev->irq, netdev);
591
592         netif_start_queue(netdev);
593
594         ibmveth_debug_printk("open complete\n");
595
596         return 0;
597 }
598
599 static int ibmveth_close(struct net_device *netdev)
600 {
601         struct ibmveth_adapter *adapter = netdev->priv;
602         long lpar_rc;
603
604         ibmveth_debug_printk("close starting\n");
605
606         napi_disable(&adapter->napi);
607
608         if (!adapter->pool_config)
609                 netif_stop_queue(netdev);
610
611         free_irq(netdev->irq, netdev);
612
613         do {
614                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
615         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
616
617         if(lpar_rc != H_SUCCESS)
618         {
619                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
620                                      lpar_rc);
621         }
622
623         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
624
625         ibmveth_cleanup(adapter);
626
627         ibmveth_debug_printk("close complete\n");
628
629         return 0;
630 }
631
632 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
633         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
634         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
635         cmd->speed = SPEED_1000;
636         cmd->duplex = DUPLEX_FULL;
637         cmd->port = PORT_FIBRE;
638         cmd->phy_address = 0;
639         cmd->transceiver = XCVR_INTERNAL;
640         cmd->autoneg = AUTONEG_ENABLE;
641         cmd->maxtxpkt = 0;
642         cmd->maxrxpkt = 1;
643         return 0;
644 }
645
646 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
647         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
648         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
649 }
650
651 static u32 netdev_get_link(struct net_device *dev) {
652         return 1;
653 }
654
655 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
656 {
657         struct ibmveth_adapter *adapter = dev->priv;
658
659         if (data)
660                 adapter->rx_csum = 1;
661         else {
662                 /*
663                  * Since the ibmveth firmware interface does not have the concept of
664                  * separate tx/rx checksum offload enable, if rx checksum is disabled
665                  * we also have to disable tx checksum offload. Once we disable rx
666                  * checksum offload, we are no longer allowed to send tx buffers that
667                  * are not properly checksummed.
668                  */
669                 adapter->rx_csum = 0;
670                 dev->features &= ~NETIF_F_IP_CSUM;
671         }
672 }
673
674 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
675 {
676         struct ibmveth_adapter *adapter = dev->priv;
677
678         if (data) {
679                 dev->features |= NETIF_F_IP_CSUM;
680                 adapter->rx_csum = 1;
681         } else
682                 dev->features &= ~NETIF_F_IP_CSUM;
683 }
684
685 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
686                                     void (*done) (struct net_device *, u32))
687 {
688         struct ibmveth_adapter *adapter = dev->priv;
689         union ibmveth_illan_attributes set_attr, clr_attr, ret_attr;
690         long ret;
691         int rc1 = 0, rc2 = 0;
692         int restart = 0;
693
694         if (netif_running(dev)) {
695                 restart = 1;
696                 adapter->pool_config = 1;
697                 ibmveth_close(dev);
698                 adapter->pool_config = 0;
699         }
700
701         set_attr.desc = 0;
702         clr_attr.desc = 0;
703
704         if (data)
705                 set_attr.fields.tcp_csum_offload_ipv4 = 1;
706         else
707                 clr_attr.fields.tcp_csum_offload_ipv4 = 1;
708
709         ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr.desc);
710
711         if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
712             !ret_attr.fields.trunk_priority &&
713             ret_attr.fields.csum_offload_padded_pkt_support) {
714                 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr.desc,
715                                          set_attr.desc, &ret_attr.desc);
716
717                 if (ret != H_SUCCESS) {
718                         rc1 = -EIO;
719                         ibmveth_error_printk("unable to change checksum offload settings."
720                                              " %d rc=%ld\n", data, ret);
721
722                         ret = h_illan_attributes(adapter->vdev->unit_address,
723                                                  set_attr.desc, clr_attr.desc, &ret_attr.desc);
724                 } else
725                         done(dev, data);
726         } else {
727                 rc1 = -EIO;
728                 ibmveth_error_printk("unable to change checksum offload settings."
729                                      " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr.desc);
730         }
731
732         if (restart)
733                 rc2 = ibmveth_open(dev);
734
735         return rc1 ? rc1 : rc2;
736 }
737
738 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
739 {
740         struct ibmveth_adapter *adapter = dev->priv;
741
742         if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
743                 return 0;
744
745         return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
746 }
747
748 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
749 {
750         struct ibmveth_adapter *adapter = dev->priv;
751         int rc = 0;
752
753         if (data && (dev->features & NETIF_F_IP_CSUM))
754                 return 0;
755         if (!data && !(dev->features & NETIF_F_IP_CSUM))
756                 return 0;
757
758         if (data && !adapter->rx_csum)
759                 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
760         else
761                 ibmveth_set_tx_csum_flags(dev, data);
762
763         return rc;
764 }
765
766 static u32 ibmveth_get_rx_csum(struct net_device *dev)
767 {
768         struct ibmveth_adapter *adapter = dev->priv;
769         return adapter->rx_csum;
770 }
771
772 static const struct ethtool_ops netdev_ethtool_ops = {
773         .get_drvinfo            = netdev_get_drvinfo,
774         .get_settings           = netdev_get_settings,
775         .get_link               = netdev_get_link,
776         .get_sg                 = ethtool_op_get_sg,
777         .get_tx_csum            = ethtool_op_get_tx_csum,
778         .set_tx_csum            = ibmveth_set_tx_csum,
779         .get_rx_csum            = ibmveth_get_rx_csum,
780         .set_rx_csum            = ibmveth_set_rx_csum,
781 };
782
783 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
784 {
785         return -EOPNOTSUPP;
786 }
787
788 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
789
790 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
791 {
792         struct ibmveth_adapter *adapter = netdev->priv;
793         union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
794         unsigned long lpar_rc;
795         int nfrags = 0, curfrag;
796         unsigned long correlator;
797         unsigned long flags;
798         unsigned int retry_count;
799         unsigned int tx_dropped = 0;
800         unsigned int tx_bytes = 0;
801         unsigned int tx_packets = 0;
802         unsigned int tx_send_failed = 0;
803         unsigned int tx_map_failed = 0;
804
805
806         if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
807                 tx_dropped++;
808                 goto out;
809         }
810
811         memset(&desc, 0, sizeof(desc));
812
813         /* nfrags = number of frags after the initial fragment */
814         nfrags = skb_shinfo(skb)->nr_frags;
815
816         if(nfrags)
817                 adapter->tx_multidesc_send++;
818
819         /* map the initial fragment */
820         desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
821         desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
822                                         desc[0].fields.length, DMA_TO_DEVICE);
823         desc[0].fields.valid   = 1;
824
825         if (skb->ip_summed == CHECKSUM_PARTIAL &&
826             ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
827                 ibmveth_error_printk("tx: failed to checksum packet\n");
828                 tx_dropped++;
829                 goto out;
830         }
831
832         if (skb->ip_summed == CHECKSUM_PARTIAL) {
833                 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
834
835                 desc[0].fields.no_csum = 1;
836                 desc[0].fields.csum_good = 1;
837
838                 /* Need to zero out the checksum */
839                 buf[0] = 0;
840                 buf[1] = 0;
841         }
842
843         if(dma_mapping_error(desc[0].fields.address)) {
844                 ibmveth_error_printk("tx: unable to map initial fragment\n");
845                 tx_map_failed++;
846                 tx_dropped++;
847                 goto out;
848         }
849
850         curfrag = nfrags;
851
852         /* map fragments past the initial portion if there are any */
853         while(curfrag--) {
854                 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
855                 desc[curfrag+1].fields.address
856                         = dma_map_single(&adapter->vdev->dev,
857                                 page_address(frag->page) + frag->page_offset,
858                                 frag->size, DMA_TO_DEVICE);
859                 desc[curfrag+1].fields.length = frag->size;
860                 desc[curfrag+1].fields.valid  = 1;
861                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
862                         desc[curfrag+1].fields.no_csum = 1;
863                         desc[curfrag+1].fields.csum_good = 1;
864                 }
865
866                 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
867                         ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
868                         tx_map_failed++;
869                         tx_dropped++;
870                         /* Free all the mappings we just created */
871                         while(curfrag < nfrags) {
872                                 dma_unmap_single(&adapter->vdev->dev,
873                                                  desc[curfrag+1].fields.address,
874                                                  desc[curfrag+1].fields.length,
875                                                  DMA_TO_DEVICE);
876                                 curfrag++;
877                         }
878                         goto out;
879                 }
880         }
881
882         /* send the frame. Arbitrarily set retrycount to 1024 */
883         correlator = 0;
884         retry_count = 1024;
885         do {
886                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
887                                              desc[0].desc,
888                                              desc[1].desc,
889                                              desc[2].desc,
890                                              desc[3].desc,
891                                              desc[4].desc,
892                                              desc[5].desc,
893                                              correlator,
894                                              &correlator);
895         } while ((lpar_rc == H_BUSY) && (retry_count--));
896
897         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
898                 int i;
899                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
900                 for(i = 0; i < 6; i++) {
901                         ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
902                                              desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
903                 }
904                 tx_send_failed++;
905                 tx_dropped++;
906         } else {
907                 tx_packets++;
908                 tx_bytes += skb->len;
909                 netdev->trans_start = jiffies;
910         }
911
912         do {
913                 dma_unmap_single(&adapter->vdev->dev,
914                                 desc[nfrags].fields.address,
915                                 desc[nfrags].fields.length, DMA_TO_DEVICE);
916         } while(--nfrags >= 0);
917
918 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
919         adapter->stats.tx_dropped += tx_dropped;
920         adapter->stats.tx_bytes += tx_bytes;
921         adapter->stats.tx_packets += tx_packets;
922         adapter->tx_send_failed += tx_send_failed;
923         adapter->tx_map_failed += tx_map_failed;
924         spin_unlock_irqrestore(&adapter->stats_lock, flags);
925
926         dev_kfree_skb(skb);
927         return 0;
928 }
929
930 static int ibmveth_poll(struct napi_struct *napi, int budget)
931 {
932         struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
933         struct net_device *netdev = adapter->netdev;
934         int frames_processed = 0;
935         unsigned long lpar_rc;
936
937  restart_poll:
938         do {
939                 struct sk_buff *skb;
940
941                 if (!ibmveth_rxq_pending_buffer(adapter))
942                         break;
943
944                 rmb();
945                 if (!ibmveth_rxq_buffer_valid(adapter)) {
946                         wmb(); /* suggested by larson1 */
947                         adapter->rx_invalid_buffer++;
948                         ibmveth_debug_printk("recycling invalid buffer\n");
949                         ibmveth_rxq_recycle_buffer(adapter);
950                 } else {
951                         int length = ibmveth_rxq_frame_length(adapter);
952                         int offset = ibmveth_rxq_frame_offset(adapter);
953                         int csum_good = ibmveth_rxq_csum_good(adapter);
954
955                         skb = ibmveth_rxq_get_buffer(adapter);
956                         if (csum_good)
957                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
958
959                         ibmveth_rxq_harvest_buffer(adapter);
960
961                         skb_reserve(skb, offset);
962                         skb_put(skb, length);
963                         skb->protocol = eth_type_trans(skb, netdev);
964
965                         netif_receive_skb(skb); /* send it up */
966
967                         adapter->stats.rx_packets++;
968                         adapter->stats.rx_bytes += length;
969                         frames_processed++;
970                         netdev->last_rx = jiffies;
971                 }
972         } while (frames_processed < budget);
973
974         ibmveth_replenish_task(adapter);
975
976         if (frames_processed < budget) {
977                 /* We think we are done - reenable interrupts,
978                  * then check once more to make sure we are done.
979                  */
980                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
981                                        VIO_IRQ_ENABLE);
982
983                 ibmveth_assert(lpar_rc == H_SUCCESS);
984
985                 netif_rx_complete(netdev, napi);
986
987                 if (ibmveth_rxq_pending_buffer(adapter) &&
988                     netif_rx_reschedule(netdev, napi)) {
989                         lpar_rc = h_vio_signal(adapter->vdev->unit_address,
990                                                VIO_IRQ_DISABLE);
991                         goto restart_poll;
992                 }
993         }
994
995         return frames_processed;
996 }
997
998 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
999 {
1000         struct net_device *netdev = dev_instance;
1001         struct ibmveth_adapter *adapter = netdev->priv;
1002         unsigned long lpar_rc;
1003
1004         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1005                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1006                                        VIO_IRQ_DISABLE);
1007                 ibmveth_assert(lpar_rc == H_SUCCESS);
1008                 __netif_rx_schedule(netdev, &adapter->napi);
1009         }
1010         return IRQ_HANDLED;
1011 }
1012
1013 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
1014 {
1015         struct ibmveth_adapter *adapter = dev->priv;
1016         return &adapter->stats;
1017 }
1018
1019 static void ibmveth_set_multicast_list(struct net_device *netdev)
1020 {
1021         struct ibmveth_adapter *adapter = netdev->priv;
1022         unsigned long lpar_rc;
1023
1024         if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
1025                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1026                                            IbmVethMcastEnableRecv |
1027                                            IbmVethMcastDisableFiltering,
1028                                            0);
1029                 if(lpar_rc != H_SUCCESS) {
1030                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1031                 }
1032         } else {
1033                 struct dev_mc_list *mclist = netdev->mc_list;
1034                 int i;
1035                 /* clear the filter table & disable filtering */
1036                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1037                                            IbmVethMcastEnableRecv |
1038                                            IbmVethMcastDisableFiltering |
1039                                            IbmVethMcastClearFilterTable,
1040                                            0);
1041                 if(lpar_rc != H_SUCCESS) {
1042                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1043                 }
1044                 /* add the addresses to the filter table */
1045                 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
1046                         // add the multicast address to the filter table
1047                         unsigned long mcast_addr = 0;
1048                         memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
1049                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1050                                                    IbmVethMcastAddFilter,
1051                                                    mcast_addr);
1052                         if(lpar_rc != H_SUCCESS) {
1053                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1054                         }
1055                 }
1056
1057                 /* re-enable filtering */
1058                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1059                                            IbmVethMcastEnableFiltering,
1060                                            0);
1061                 if(lpar_rc != H_SUCCESS) {
1062                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1063                 }
1064         }
1065 }
1066
1067 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1068 {
1069         struct ibmveth_adapter *adapter = dev->priv;
1070         int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1071         int reinit = 0;
1072         int i, rc;
1073
1074         if (new_mtu < IBMVETH_MAX_MTU)
1075                 return -EINVAL;
1076
1077         for (i = 0; i < IbmVethNumBufferPools; i++)
1078                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1079                         break;
1080
1081         if (i == IbmVethNumBufferPools)
1082                 return -EINVAL;
1083
1084         /* Look for an active buffer pool that can hold the new MTU */
1085         for(i = 0; i<IbmVethNumBufferPools; i++) {
1086                 if (!adapter->rx_buff_pool[i].active) {
1087                         adapter->rx_buff_pool[i].active = 1;
1088                         reinit = 1;
1089                 }
1090
1091                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1092                         if (reinit && netif_running(adapter->netdev)) {
1093                                 adapter->pool_config = 1;
1094                                 ibmveth_close(adapter->netdev);
1095                                 adapter->pool_config = 0;
1096                                 dev->mtu = new_mtu;
1097                                 if ((rc = ibmveth_open(adapter->netdev)))
1098                                         return rc;
1099                         } else
1100                                 dev->mtu = new_mtu;
1101                         return 0;
1102                 }
1103         }
1104         return -EINVAL;
1105 }
1106
1107 #ifdef CONFIG_NET_POLL_CONTROLLER
1108 static void ibmveth_poll_controller(struct net_device *dev)
1109 {
1110         ibmveth_replenish_task(dev->priv);
1111         ibmveth_interrupt(dev->irq, dev);
1112 }
1113 #endif
1114
1115 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1116 {
1117         int rc, i;
1118         long ret;
1119         struct net_device *netdev;
1120         struct ibmveth_adapter *adapter;
1121         union ibmveth_illan_attributes set_attr, ret_attr;
1122
1123         unsigned char *mac_addr_p;
1124         unsigned int *mcastFilterSize_p;
1125
1126
1127         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1128                                         dev->unit_address);
1129
1130         mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1131                                                 VETH_MAC_ADDR, NULL);
1132         if(!mac_addr_p) {
1133                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1134                                 "attribute\n", __FILE__, __LINE__);
1135                 return 0;
1136         }
1137
1138         mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1139                                                 VETH_MCAST_FILTER_SIZE, NULL);
1140         if(!mcastFilterSize_p) {
1141                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1142                                 "VETH_MCAST_FILTER_SIZE attribute\n",
1143                                 __FILE__, __LINE__);
1144                 return 0;
1145         }
1146
1147         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1148
1149         if(!netdev)
1150                 return -ENOMEM;
1151
1152         SET_MODULE_OWNER(netdev);
1153
1154         adapter = netdev->priv;
1155         dev->dev.driver_data = netdev;
1156
1157         adapter->vdev = dev;
1158         adapter->netdev = netdev;
1159         adapter->mcastFilterSize= *mcastFilterSize_p;
1160         adapter->pool_config = 0;
1161
1162         netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1163
1164         /*      Some older boxes running PHYP non-natively have an OF that
1165                 returns a 8-byte local-mac-address field (and the first
1166                 2 bytes have to be ignored) while newer boxes' OF return
1167                 a 6-byte field. Note that IEEE 1275 specifies that
1168                 local-mac-address must be a 6-byte field.
1169                 The RPA doc specifies that the first byte must be 10b, so
1170                 we'll just look for it to solve this 8 vs. 6 byte field issue */
1171
1172         if ((*mac_addr_p & 0x3) != 0x02)
1173                 mac_addr_p += 2;
1174
1175         adapter->mac_addr = 0;
1176         memcpy(&adapter->mac_addr, mac_addr_p, 6);
1177
1178         netdev->irq = dev->irq;
1179         netdev->open               = ibmveth_open;
1180         netdev->stop               = ibmveth_close;
1181         netdev->hard_start_xmit    = ibmveth_start_xmit;
1182         netdev->get_stats          = ibmveth_get_stats;
1183         netdev->set_multicast_list = ibmveth_set_multicast_list;
1184         netdev->do_ioctl           = ibmveth_ioctl;
1185         netdev->ethtool_ops           = &netdev_ethtool_ops;
1186         netdev->change_mtu         = ibmveth_change_mtu;
1187         SET_NETDEV_DEV(netdev, &dev->dev);
1188 #ifdef CONFIG_NET_POLL_CONTROLLER
1189         netdev->poll_controller = ibmveth_poll_controller;
1190 #endif
1191         netdev->features |= NETIF_F_LLTX;
1192         spin_lock_init(&adapter->stats_lock);
1193
1194         memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1195
1196         for(i = 0; i<IbmVethNumBufferPools; i++) {
1197                 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1198                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1199                                          pool_count[i], pool_size[i],
1200                                          pool_active[i]);
1201                 kobj->parent = &dev->dev.kobj;
1202                 sprintf(kobj->name, "pool%d", i);
1203                 kobj->ktype = &ktype_veth_pool;
1204                 kobject_register(kobj);
1205         }
1206
1207         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1208
1209         adapter->buffer_list_dma = DMA_ERROR_CODE;
1210         adapter->filter_list_dma = DMA_ERROR_CODE;
1211         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1212
1213         ibmveth_debug_printk("registering netdev...\n");
1214
1215         ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc);
1216
1217         if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
1218             !ret_attr.fields.trunk_priority &&
1219             ret_attr.fields.csum_offload_padded_pkt_support) {
1220                 set_attr.desc = 0;
1221                 set_attr.fields.tcp_csum_offload_ipv4 = 1;
1222
1223                 ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc,
1224                                          &ret_attr.desc);
1225
1226                 if (ret == H_SUCCESS) {
1227                         adapter->rx_csum = 1;
1228                         netdev->features |= NETIF_F_IP_CSUM;
1229                 } else
1230                         ret = h_illan_attributes(dev->unit_address, set_attr.desc,
1231                                                  0, &ret_attr.desc);
1232         }
1233
1234         rc = register_netdev(netdev);
1235
1236         if(rc) {
1237                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1238                 free_netdev(netdev);
1239                 return rc;
1240         }
1241
1242         ibmveth_debug_printk("registered\n");
1243
1244         ibmveth_proc_register_adapter(adapter);
1245
1246         return 0;
1247 }
1248
1249 static int __devexit ibmveth_remove(struct vio_dev *dev)
1250 {
1251         struct net_device *netdev = dev->dev.driver_data;
1252         struct ibmveth_adapter *adapter = netdev->priv;
1253         int i;
1254
1255         for(i = 0; i<IbmVethNumBufferPools; i++)
1256                 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1257
1258         unregister_netdev(netdev);
1259
1260         ibmveth_proc_unregister_adapter(adapter);
1261
1262         free_netdev(netdev);
1263         return 0;
1264 }
1265
1266 #ifdef CONFIG_PROC_FS
1267 static void ibmveth_proc_register_driver(void)
1268 {
1269         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1270         if (ibmveth_proc_dir) {
1271                 SET_MODULE_OWNER(ibmveth_proc_dir);
1272         }
1273 }
1274
1275 static void ibmveth_proc_unregister_driver(void)
1276 {
1277         remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1278 }
1279
1280 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1281 {
1282         if (*pos == 0) {
1283                 return (void *)1;
1284         } else {
1285                 return NULL;
1286         }
1287 }
1288
1289 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1290 {
1291         ++*pos;
1292         return NULL;
1293 }
1294
1295 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1296 {
1297 }
1298
1299 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1300 {
1301         struct ibmveth_adapter *adapter = seq->private;
1302         char *current_mac = ((char*) &adapter->netdev->dev_addr);
1303         char *firmware_mac = ((char*) &adapter->mac_addr) ;
1304
1305         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1306
1307         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1308         seq_printf(seq, "Current MAC:     %02X:%02X:%02X:%02X:%02X:%02X\n",
1309                    current_mac[0], current_mac[1], current_mac[2],
1310                    current_mac[3], current_mac[4], current_mac[5]);
1311         seq_printf(seq, "Firmware MAC:    %02X:%02X:%02X:%02X:%02X:%02X\n",
1312                    firmware_mac[0], firmware_mac[1], firmware_mac[2],
1313                    firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1314
1315         seq_printf(seq, "\nAdapter Statistics:\n");
1316         seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
1317         seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
1318         seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
1319         seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
1320         seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
1321         seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
1322         seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
1323         seq_printf(seq, "       add buffer failures:         %ld\n", adapter->replenish_add_buff_failure);
1324         seq_printf(seq, "       invalid buffers:             %ld\n", adapter->rx_invalid_buffer);
1325         seq_printf(seq, "       no buffers:                  %ld\n", adapter->rx_no_buffer);
1326
1327         return 0;
1328 }
1329 static struct seq_operations ibmveth_seq_ops = {
1330         .start = ibmveth_seq_start,
1331         .next  = ibmveth_seq_next,
1332         .stop  = ibmveth_seq_stop,
1333         .show  = ibmveth_seq_show,
1334 };
1335
1336 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1337 {
1338         struct seq_file *seq;
1339         struct proc_dir_entry *proc;
1340         int rc;
1341
1342         rc = seq_open(file, &ibmveth_seq_ops);
1343         if (!rc) {
1344                 /* recover the pointer buried in proc_dir_entry data */
1345                 seq = file->private_data;
1346                 proc = PDE(inode);
1347                 seq->private = proc->data;
1348         }
1349         return rc;
1350 }
1351
1352 static const struct file_operations ibmveth_proc_fops = {
1353         .owner   = THIS_MODULE,
1354         .open    = ibmveth_proc_open,
1355         .read    = seq_read,
1356         .llseek  = seq_lseek,
1357         .release = seq_release,
1358 };
1359
1360 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1361 {
1362         struct proc_dir_entry *entry;
1363         if (ibmveth_proc_dir) {
1364                 char u_addr[10];
1365                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1366                 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1367                 if (!entry) {
1368                         ibmveth_error_printk("Cannot create adapter proc entry");
1369                 } else {
1370                         entry->data = (void *) adapter;
1371                         entry->proc_fops = &ibmveth_proc_fops;
1372                         SET_MODULE_OWNER(entry);
1373                 }
1374         }
1375         return;
1376 }
1377
1378 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1379 {
1380         if (ibmveth_proc_dir) {
1381                 char u_addr[10];
1382                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1383                 remove_proc_entry(u_addr, ibmveth_proc_dir);
1384         }
1385 }
1386
1387 #else /* CONFIG_PROC_FS */
1388 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1389 {
1390 }
1391
1392 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1393 {
1394 }
1395 static void ibmveth_proc_register_driver(void)
1396 {
1397 }
1398
1399 static void ibmveth_proc_unregister_driver(void)
1400 {
1401 }
1402 #endif /* CONFIG_PROC_FS */
1403
1404 static struct attribute veth_active_attr;
1405 static struct attribute veth_num_attr;
1406 static struct attribute veth_size_attr;
1407
1408 static ssize_t veth_pool_show(struct kobject * kobj,
1409                               struct attribute * attr, char * buf)
1410 {
1411         struct ibmveth_buff_pool *pool = container_of(kobj,
1412                                                       struct ibmveth_buff_pool,
1413                                                       kobj);
1414
1415         if (attr == &veth_active_attr)
1416                 return sprintf(buf, "%d\n", pool->active);
1417         else if (attr == &veth_num_attr)
1418                 return sprintf(buf, "%d\n", pool->size);
1419         else if (attr == &veth_size_attr)
1420                 return sprintf(buf, "%d\n", pool->buff_size);
1421         return 0;
1422 }
1423
1424 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1425 const char * buf, size_t count)
1426 {
1427         struct ibmveth_buff_pool *pool = container_of(kobj,
1428                                                       struct ibmveth_buff_pool,
1429                                                       kobj);
1430         struct net_device *netdev =
1431             container_of(kobj->parent, struct device, kobj)->driver_data;
1432         struct ibmveth_adapter *adapter = netdev->priv;
1433         long value = simple_strtol(buf, NULL, 10);
1434         long rc;
1435
1436         if (attr == &veth_active_attr) {
1437                 if (value && !pool->active) {
1438                         if (netif_running(netdev)) {
1439                                 if(ibmveth_alloc_buffer_pool(pool)) {
1440                                         ibmveth_error_printk("unable to alloc pool\n");
1441                                         return -ENOMEM;
1442                                 }
1443                                 pool->active = 1;
1444                                 adapter->pool_config = 1;
1445                                 ibmveth_close(netdev);
1446                                 adapter->pool_config = 0;
1447                                 if ((rc = ibmveth_open(netdev)))
1448                                         return rc;
1449                         } else
1450                                 pool->active = 1;
1451                 } else if (!value && pool->active) {
1452                         int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1453                         int i;
1454                         /* Make sure there is a buffer pool with buffers that
1455                            can hold a packet of the size of the MTU */
1456                         for (i = 0; i < IbmVethNumBufferPools; i++) {
1457                                 if (pool == &adapter->rx_buff_pool[i])
1458                                         continue;
1459                                 if (!adapter->rx_buff_pool[i].active)
1460                                         continue;
1461                                 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1462                                         break;
1463                         }
1464
1465                         if (i == IbmVethNumBufferPools) {
1466                                 ibmveth_error_printk("no active pool >= MTU\n");
1467                                 return -EPERM;
1468                         }
1469
1470                         pool->active = 0;
1471                         if (netif_running(netdev)) {
1472                                 adapter->pool_config = 1;
1473                                 ibmveth_close(netdev);
1474                                 adapter->pool_config = 0;
1475                                 if ((rc = ibmveth_open(netdev)))
1476                                         return rc;
1477                         }
1478                 }
1479         } else if (attr == &veth_num_attr) {
1480                 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1481                         return -EINVAL;
1482                 else {
1483                         if (netif_running(netdev)) {
1484                                 adapter->pool_config = 1;
1485                                 ibmveth_close(netdev);
1486                                 adapter->pool_config = 0;
1487                                 pool->size = value;
1488                                 if ((rc = ibmveth_open(netdev)))
1489                                         return rc;
1490                         } else
1491                                 pool->size = value;
1492                 }
1493         } else if (attr == &veth_size_attr) {
1494                 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1495                         return -EINVAL;
1496                 else {
1497                         if (netif_running(netdev)) {
1498                                 adapter->pool_config = 1;
1499                                 ibmveth_close(netdev);
1500                                 adapter->pool_config = 0;
1501                                 pool->buff_size = value;
1502                                 if ((rc = ibmveth_open(netdev)))
1503                                         return rc;
1504                         } else
1505                                 pool->buff_size = value;
1506                 }
1507         }
1508
1509         /* kick the interrupt handler to allocate/deallocate pools */
1510         ibmveth_interrupt(netdev->irq, netdev);
1511         return count;
1512 }
1513
1514
1515 #define ATTR(_name, _mode)      \
1516         struct attribute veth_##_name##_attr = {               \
1517         .name = __stringify(_name), .mode = _mode, \
1518         };
1519
1520 static ATTR(active, 0644);
1521 static ATTR(num, 0644);
1522 static ATTR(size, 0644);
1523
1524 static struct attribute * veth_pool_attrs[] = {
1525         &veth_active_attr,
1526         &veth_num_attr,
1527         &veth_size_attr,
1528         NULL,
1529 };
1530
1531 static struct sysfs_ops veth_pool_ops = {
1532         .show   = veth_pool_show,
1533         .store  = veth_pool_store,
1534 };
1535
1536 static struct kobj_type ktype_veth_pool = {
1537         .release        = NULL,
1538         .sysfs_ops      = &veth_pool_ops,
1539         .default_attrs  = veth_pool_attrs,
1540 };
1541
1542
1543 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1544         { "network", "IBM,l-lan"},
1545         { "", "" }
1546 };
1547 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1548
1549 static struct vio_driver ibmveth_driver = {
1550         .id_table       = ibmveth_device_table,
1551         .probe          = ibmveth_probe,
1552         .remove         = ibmveth_remove,
1553         .driver         = {
1554                 .name   = ibmveth_driver_name,
1555                 .owner  = THIS_MODULE,
1556         }
1557 };
1558
1559 static int __init ibmveth_module_init(void)
1560 {
1561         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1562
1563         ibmveth_proc_register_driver();
1564
1565         return vio_register_driver(&ibmveth_driver);
1566 }
1567
1568 static void __exit ibmveth_module_exit(void)
1569 {
1570         vio_unregister_driver(&ibmveth_driver);
1571         ibmveth_proc_unregister_driver();
1572 }
1573
1574 module_init(ibmveth_module_init);
1575 module_exit(ibmveth_module_exit);