net: convert multicast list to list_head
[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   - add support for sysfs
32   - possibly remove procfs support
33 */
34
35 #include <linux/module.h>
36 #include <linux/moduleparam.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/hvcall.h>
54 #include <asm/atomic.h>
55 #include <asm/vio.h>
56 #include <asm/iommu.h>
57 #include <asm/uaccess.h>
58 #include <asm/firmware.h>
59 #include <linux/seq_file.h>
60
61 #include "ibmveth.h"
62
63 #undef DEBUG
64
65 #define ibmveth_printk(fmt, args...) \
66   printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
67
68 #define ibmveth_error_printk(fmt, args...) \
69   printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
70
71 #ifdef DEBUG
72 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
73   printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
74 #define ibmveth_debug_printk(fmt, args...) \
75   printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
76 #define ibmveth_assert(expr) \
77   if(!(expr)) {                                   \
78     printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
79     BUG(); \
80   }
81 #else
82 #define ibmveth_debug_printk_no_adapter(fmt, args...)
83 #define ibmveth_debug_printk(fmt, args...)
84 #define ibmveth_assert(expr)
85 #endif
86
87 static int ibmveth_open(struct net_device *dev);
88 static int ibmveth_close(struct net_device *dev);
89 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
90 static int ibmveth_poll(struct napi_struct *napi, int budget);
91 static int ibmveth_start_xmit(struct sk_buff *skb, 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 unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
101 static struct kobj_type ktype_veth_pool;
102
103
104 #ifdef CONFIG_PROC_FS
105 #define IBMVETH_PROC_DIR "ibmveth"
106 static struct proc_dir_entry *ibmveth_proc_dir;
107 #endif
108
109 static const char ibmveth_driver_name[] = "ibmveth";
110 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
111 #define ibmveth_driver_version "1.03"
112
113 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
114 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
115 MODULE_LICENSE("GPL");
116 MODULE_VERSION(ibmveth_driver_version);
117
118 struct ibmveth_stat {
119         char name[ETH_GSTRING_LEN];
120         int offset;
121 };
122
123 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
124 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
125
126 struct ibmveth_stat ibmveth_stats[] = {
127         { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
128         { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
129         { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
130         { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
131         { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
132         { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
133         { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
134         { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
135 };
136
137 /* simple methods of getting data from the current rxq entry */
138 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
139 {
140         return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
141 }
142
143 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
144 {
145         return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
146 }
147
148 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
149 {
150         return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
151 }
152
153 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
154 {
155         return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
156 }
157
158 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
159 {
160         return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
161 }
162
163 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
164 {
165         return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
166 }
167
168 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
169 {
170         return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
171 }
172
173 /* setup the initial settings for a buffer pool */
174 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
175 {
176         pool->size = pool_size;
177         pool->index = pool_index;
178         pool->buff_size = buff_size;
179         pool->threshold = pool_size / 2;
180         pool->active = pool_active;
181 }
182
183 /* allocate and setup an buffer pool - called during open */
184 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
185 {
186         int i;
187
188         pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
189
190         if(!pool->free_map) {
191                 return -1;
192         }
193
194         pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
195         if(!pool->dma_addr) {
196                 kfree(pool->free_map);
197                 pool->free_map = NULL;
198                 return -1;
199         }
200
201         pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
202
203         if(!pool->skbuff) {
204                 kfree(pool->dma_addr);
205                 pool->dma_addr = NULL;
206
207                 kfree(pool->free_map);
208                 pool->free_map = NULL;
209                 return -1;
210         }
211
212         memset(pool->skbuff, 0, sizeof(void*) * pool->size);
213         memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
214
215         for(i = 0; i < pool->size; ++i) {
216                 pool->free_map[i] = i;
217         }
218
219         atomic_set(&pool->available, 0);
220         pool->producer_index = 0;
221         pool->consumer_index = 0;
222
223         return 0;
224 }
225
226 /* replenish the buffers for a pool.  note that we don't need to
227  * skb_reserve these since they are used for incoming...
228  */
229 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
230 {
231         u32 i;
232         u32 count = pool->size - atomic_read(&pool->available);
233         u32 buffers_added = 0;
234         struct sk_buff *skb;
235         unsigned int free_index, index;
236         u64 correlator;
237         unsigned long lpar_rc;
238         dma_addr_t dma_addr;
239
240         mb();
241
242         for(i = 0; i < count; ++i) {
243                 union ibmveth_buf_desc desc;
244
245                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
246
247                 if(!skb) {
248                         ibmveth_debug_printk("replenish: unable to allocate skb\n");
249                         adapter->replenish_no_mem++;
250                         break;
251                 }
252
253                 free_index = pool->consumer_index;
254                 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
255                 index = pool->free_map[free_index];
256
257                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
258                 ibmveth_assert(pool->skbuff[index] == NULL);
259
260                 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
261                                 pool->buff_size, DMA_FROM_DEVICE);
262
263                 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
264                         goto failure;
265
266                 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
267                 pool->dma_addr[index] = dma_addr;
268                 pool->skbuff[index] = skb;
269
270                 correlator = ((u64)pool->index << 32) | index;
271                 *(u64*)skb->data = correlator;
272
273                 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
274                 desc.fields.address = dma_addr;
275
276                 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
277
278                 if (lpar_rc != H_SUCCESS)
279                         goto failure;
280                 else {
281                         buffers_added++;
282                         adapter->replenish_add_buff_success++;
283                 }
284         }
285
286         mb();
287         atomic_add(buffers_added, &(pool->available));
288         return;
289
290 failure:
291         pool->free_map[free_index] = index;
292         pool->skbuff[index] = NULL;
293         if (pool->consumer_index == 0)
294                 pool->consumer_index = pool->size - 1;
295         else
296                 pool->consumer_index--;
297         if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
298                 dma_unmap_single(&adapter->vdev->dev,
299                                  pool->dma_addr[index], pool->buff_size,
300                                  DMA_FROM_DEVICE);
301         dev_kfree_skb_any(skb);
302         adapter->replenish_add_buff_failure++;
303
304         mb();
305         atomic_add(buffers_added, &(pool->available));
306 }
307
308 /* replenish routine */
309 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
310 {
311         int i;
312
313         adapter->replenish_task_cycles++;
314
315         for (i = (IbmVethNumBufferPools - 1); i >= 0; i--)
316                 if(adapter->rx_buff_pool[i].active)
317                         ibmveth_replenish_buffer_pool(adapter,
318                                                      &adapter->rx_buff_pool[i]);
319
320         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
321 }
322
323 /* empty and free ana buffer pool - also used to do cleanup in error paths */
324 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
325 {
326         int i;
327
328         kfree(pool->free_map);
329         pool->free_map = NULL;
330
331         if(pool->skbuff && pool->dma_addr) {
332                 for(i = 0; i < pool->size; ++i) {
333                         struct sk_buff *skb = pool->skbuff[i];
334                         if(skb) {
335                                 dma_unmap_single(&adapter->vdev->dev,
336                                                  pool->dma_addr[i],
337                                                  pool->buff_size,
338                                                  DMA_FROM_DEVICE);
339                                 dev_kfree_skb_any(skb);
340                                 pool->skbuff[i] = NULL;
341                         }
342                 }
343         }
344
345         if(pool->dma_addr) {
346                 kfree(pool->dma_addr);
347                 pool->dma_addr = NULL;
348         }
349
350         if(pool->skbuff) {
351                 kfree(pool->skbuff);
352                 pool->skbuff = NULL;
353         }
354 }
355
356 /* remove a buffer from a pool */
357 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
358 {
359         unsigned int pool  = correlator >> 32;
360         unsigned int index = correlator & 0xffffffffUL;
361         unsigned int free_index;
362         struct sk_buff *skb;
363
364         ibmveth_assert(pool < IbmVethNumBufferPools);
365         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
366
367         skb = adapter->rx_buff_pool[pool].skbuff[index];
368
369         ibmveth_assert(skb != NULL);
370
371         adapter->rx_buff_pool[pool].skbuff[index] = NULL;
372
373         dma_unmap_single(&adapter->vdev->dev,
374                          adapter->rx_buff_pool[pool].dma_addr[index],
375                          adapter->rx_buff_pool[pool].buff_size,
376                          DMA_FROM_DEVICE);
377
378         free_index = adapter->rx_buff_pool[pool].producer_index;
379         adapter->rx_buff_pool[pool].producer_index
380                 = (adapter->rx_buff_pool[pool].producer_index + 1)
381                 % adapter->rx_buff_pool[pool].size;
382         adapter->rx_buff_pool[pool].free_map[free_index] = index;
383
384         mb();
385
386         atomic_dec(&(adapter->rx_buff_pool[pool].available));
387 }
388
389 /* get the current buffer on the rx queue */
390 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
391 {
392         u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
393         unsigned int pool = correlator >> 32;
394         unsigned int index = correlator & 0xffffffffUL;
395
396         ibmveth_assert(pool < IbmVethNumBufferPools);
397         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
398
399         return adapter->rx_buff_pool[pool].skbuff[index];
400 }
401
402 /* recycle the current buffer on the rx queue */
403 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
404 {
405         u32 q_index = adapter->rx_queue.index;
406         u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
407         unsigned int pool = correlator >> 32;
408         unsigned int index = correlator & 0xffffffffUL;
409         union ibmveth_buf_desc desc;
410         unsigned long lpar_rc;
411
412         ibmveth_assert(pool < IbmVethNumBufferPools);
413         ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
414
415         if(!adapter->rx_buff_pool[pool].active) {
416                 ibmveth_rxq_harvest_buffer(adapter);
417                 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
418                 return;
419         }
420
421         desc.fields.flags_len = IBMVETH_BUF_VALID |
422                 adapter->rx_buff_pool[pool].buff_size;
423         desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
424
425         lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
426
427         if(lpar_rc != H_SUCCESS) {
428                 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
429                 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
430         }
431
432         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
433                 adapter->rx_queue.index = 0;
434                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
435         }
436 }
437
438 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
439 {
440         ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
441
442         if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
443                 adapter->rx_queue.index = 0;
444                 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
445         }
446 }
447
448 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
449 {
450         int i;
451         struct device *dev = &adapter->vdev->dev;
452
453         if(adapter->buffer_list_addr != NULL) {
454                 if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
455                         dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
456                                         DMA_BIDIRECTIONAL);
457                         adapter->buffer_list_dma = DMA_ERROR_CODE;
458                 }
459                 free_page((unsigned long)adapter->buffer_list_addr);
460                 adapter->buffer_list_addr = NULL;
461         }
462
463         if(adapter->filter_list_addr != NULL) {
464                 if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
465                         dma_unmap_single(dev, adapter->filter_list_dma, 4096,
466                                         DMA_BIDIRECTIONAL);
467                         adapter->filter_list_dma = DMA_ERROR_CODE;
468                 }
469                 free_page((unsigned long)adapter->filter_list_addr);
470                 adapter->filter_list_addr = NULL;
471         }
472
473         if(adapter->rx_queue.queue_addr != NULL) {
474                 if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
475                         dma_unmap_single(dev,
476                                         adapter->rx_queue.queue_dma,
477                                         adapter->rx_queue.queue_len,
478                                         DMA_BIDIRECTIONAL);
479                         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
480                 }
481                 kfree(adapter->rx_queue.queue_addr);
482                 adapter->rx_queue.queue_addr = NULL;
483         }
484
485         for(i = 0; i<IbmVethNumBufferPools; i++)
486                 if (adapter->rx_buff_pool[i].active)
487                         ibmveth_free_buffer_pool(adapter,
488                                                  &adapter->rx_buff_pool[i]);
489
490         if (adapter->bounce_buffer != NULL) {
491                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
492                         dma_unmap_single(&adapter->vdev->dev,
493                                         adapter->bounce_buffer_dma,
494                                         adapter->netdev->mtu + IBMVETH_BUFF_OH,
495                                         DMA_BIDIRECTIONAL);
496                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
497                 }
498                 kfree(adapter->bounce_buffer);
499                 adapter->bounce_buffer = NULL;
500         }
501 }
502
503 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
504         union ibmveth_buf_desc rxq_desc, u64 mac_address)
505 {
506         int rc, try_again = 1;
507
508         /* After a kexec the adapter will still be open, so our attempt to
509         * open it will fail. So if we get a failure we free the adapter and
510         * try again, but only once. */
511 retry:
512         rc = h_register_logical_lan(adapter->vdev->unit_address,
513                                     adapter->buffer_list_dma, rxq_desc.desc,
514                                     adapter->filter_list_dma, mac_address);
515
516         if (rc != H_SUCCESS && try_again) {
517                 do {
518                         rc = h_free_logical_lan(adapter->vdev->unit_address);
519                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
520
521                 try_again = 0;
522                 goto retry;
523         }
524
525         return rc;
526 }
527
528 static int ibmveth_open(struct net_device *netdev)
529 {
530         struct ibmveth_adapter *adapter = netdev_priv(netdev);
531         u64 mac_address = 0;
532         int rxq_entries = 1;
533         unsigned long lpar_rc;
534         int rc;
535         union ibmveth_buf_desc rxq_desc;
536         int i;
537         struct device *dev;
538
539         ibmveth_debug_printk("open starting\n");
540
541         napi_enable(&adapter->napi);
542
543         for(i = 0; i<IbmVethNumBufferPools; i++)
544                 rxq_entries += adapter->rx_buff_pool[i].size;
545
546         adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
547         adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
548
549         if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
550                 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
551                 ibmveth_cleanup(adapter);
552                 napi_disable(&adapter->napi);
553                 return -ENOMEM;
554         }
555
556         adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
557         adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
558
559         if(!adapter->rx_queue.queue_addr) {
560                 ibmveth_error_printk("unable to allocate rx queue pages\n");
561                 ibmveth_cleanup(adapter);
562                 napi_disable(&adapter->napi);
563                 return -ENOMEM;
564         }
565
566         dev = &adapter->vdev->dev;
567
568         adapter->buffer_list_dma = dma_map_single(dev,
569                         adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
570         adapter->filter_list_dma = dma_map_single(dev,
571                         adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
572         adapter->rx_queue.queue_dma = dma_map_single(dev,
573                         adapter->rx_queue.queue_addr,
574                         adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
575
576         if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
577             (dma_mapping_error(dev, adapter->filter_list_dma)) ||
578             (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
579                 ibmveth_error_printk("unable to map filter or buffer list pages\n");
580                 ibmveth_cleanup(adapter);
581                 napi_disable(&adapter->napi);
582                 return -ENOMEM;
583         }
584
585         adapter->rx_queue.index = 0;
586         adapter->rx_queue.num_slots = rxq_entries;
587         adapter->rx_queue.toggle = 1;
588
589         memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
590         mac_address = mac_address >> 16;
591
592         rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
593         rxq_desc.fields.address = adapter->rx_queue.queue_dma;
594
595         ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
596         ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
597         ibmveth_debug_printk("receive q   @ 0x%p\n", adapter->rx_queue.queue_addr);
598
599         h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
600
601         lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
602
603         if(lpar_rc != H_SUCCESS) {
604                 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
605                 ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n",
606                                      adapter->buffer_list_dma,
607                                      adapter->filter_list_dma,
608                                      rxq_desc.desc,
609                                      mac_address);
610                 ibmveth_cleanup(adapter);
611                 napi_disable(&adapter->napi);
612                 return -ENONET;
613         }
614
615         for(i = 0; i<IbmVethNumBufferPools; i++) {
616                 if(!adapter->rx_buff_pool[i].active)
617                         continue;
618                 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
619                         ibmveth_error_printk("unable to alloc pool\n");
620                         adapter->rx_buff_pool[i].active = 0;
621                         ibmveth_cleanup(adapter);
622                         napi_disable(&adapter->napi);
623                         return -ENOMEM ;
624                 }
625         }
626
627         ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
628         if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
629                 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
630                 do {
631                         rc = h_free_logical_lan(adapter->vdev->unit_address);
632                 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
633
634                 ibmveth_cleanup(adapter);
635                 napi_disable(&adapter->napi);
636                 return rc;
637         }
638
639         adapter->bounce_buffer =
640             kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
641         if (!adapter->bounce_buffer) {
642                 ibmveth_error_printk("unable to allocate bounce buffer\n");
643                 ibmveth_cleanup(adapter);
644                 napi_disable(&adapter->napi);
645                 return -ENOMEM;
646         }
647         adapter->bounce_buffer_dma =
648             dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
649                            netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
650         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
651                 ibmveth_error_printk("unable to map bounce buffer\n");
652                 ibmveth_cleanup(adapter);
653                 napi_disable(&adapter->napi);
654                 return -ENOMEM;
655         }
656
657         ibmveth_debug_printk("initial replenish cycle\n");
658         ibmveth_interrupt(netdev->irq, netdev);
659
660         netif_start_queue(netdev);
661
662         ibmveth_debug_printk("open complete\n");
663
664         return 0;
665 }
666
667 static int ibmveth_close(struct net_device *netdev)
668 {
669         struct ibmveth_adapter *adapter = netdev_priv(netdev);
670         long lpar_rc;
671
672         ibmveth_debug_printk("close starting\n");
673
674         napi_disable(&adapter->napi);
675
676         if (!adapter->pool_config)
677                 netif_stop_queue(netdev);
678
679         free_irq(netdev->irq, netdev);
680
681         do {
682                 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
683         } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
684
685         if(lpar_rc != H_SUCCESS)
686         {
687                 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
688                                      lpar_rc);
689         }
690
691         adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
692
693         ibmveth_cleanup(adapter);
694
695         ibmveth_debug_printk("close complete\n");
696
697         return 0;
698 }
699
700 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
701         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
702         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
703         cmd->speed = SPEED_1000;
704         cmd->duplex = DUPLEX_FULL;
705         cmd->port = PORT_FIBRE;
706         cmd->phy_address = 0;
707         cmd->transceiver = XCVR_INTERNAL;
708         cmd->autoneg = AUTONEG_ENABLE;
709         cmd->maxtxpkt = 0;
710         cmd->maxrxpkt = 1;
711         return 0;
712 }
713
714 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
715         strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
716         strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
717 }
718
719 static u32 netdev_get_link(struct net_device *dev) {
720         return 1;
721 }
722
723 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
724 {
725         struct ibmveth_adapter *adapter = netdev_priv(dev);
726
727         if (data)
728                 adapter->rx_csum = 1;
729         else {
730                 /*
731                  * Since the ibmveth firmware interface does not have the concept of
732                  * separate tx/rx checksum offload enable, if rx checksum is disabled
733                  * we also have to disable tx checksum offload. Once we disable rx
734                  * checksum offload, we are no longer allowed to send tx buffers that
735                  * are not properly checksummed.
736                  */
737                 adapter->rx_csum = 0;
738                 dev->features &= ~NETIF_F_IP_CSUM;
739         }
740 }
741
742 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
743 {
744         struct ibmveth_adapter *adapter = netdev_priv(dev);
745
746         if (data) {
747                 dev->features |= NETIF_F_IP_CSUM;
748                 adapter->rx_csum = 1;
749         } else
750                 dev->features &= ~NETIF_F_IP_CSUM;
751 }
752
753 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
754                                     void (*done) (struct net_device *, u32))
755 {
756         struct ibmveth_adapter *adapter = netdev_priv(dev);
757         unsigned long set_attr, clr_attr, ret_attr;
758         long ret;
759         int rc1 = 0, rc2 = 0;
760         int restart = 0;
761
762         if (netif_running(dev)) {
763                 restart = 1;
764                 adapter->pool_config = 1;
765                 ibmveth_close(dev);
766                 adapter->pool_config = 0;
767         }
768
769         set_attr = 0;
770         clr_attr = 0;
771
772         if (data)
773                 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
774         else
775                 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
776
777         ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
778
779         if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
780             !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
781             (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
782                 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
783                                          set_attr, &ret_attr);
784
785                 if (ret != H_SUCCESS) {
786                         rc1 = -EIO;
787                         ibmveth_error_printk("unable to change checksum offload settings."
788                                              " %d rc=%ld\n", data, ret);
789
790                         ret = h_illan_attributes(adapter->vdev->unit_address,
791                                                  set_attr, clr_attr, &ret_attr);
792                 } else
793                         done(dev, data);
794         } else {
795                 rc1 = -EIO;
796                 ibmveth_error_printk("unable to change checksum offload settings."
797                                      " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
798         }
799
800         if (restart)
801                 rc2 = ibmveth_open(dev);
802
803         return rc1 ? rc1 : rc2;
804 }
805
806 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
807 {
808         struct ibmveth_adapter *adapter = netdev_priv(dev);
809
810         if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
811                 return 0;
812
813         return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
814 }
815
816 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
817 {
818         struct ibmveth_adapter *adapter = netdev_priv(dev);
819         int rc = 0;
820
821         if (data && (dev->features & NETIF_F_IP_CSUM))
822                 return 0;
823         if (!data && !(dev->features & NETIF_F_IP_CSUM))
824                 return 0;
825
826         if (data && !adapter->rx_csum)
827                 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
828         else
829                 ibmveth_set_tx_csum_flags(dev, data);
830
831         return rc;
832 }
833
834 static u32 ibmveth_get_rx_csum(struct net_device *dev)
835 {
836         struct ibmveth_adapter *adapter = netdev_priv(dev);
837         return adapter->rx_csum;
838 }
839
840 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
841 {
842         int i;
843
844         if (stringset != ETH_SS_STATS)
845                 return;
846
847         for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
848                 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
849 }
850
851 static int ibmveth_get_sset_count(struct net_device *dev, int sset)
852 {
853         switch (sset) {
854         case ETH_SS_STATS:
855                 return ARRAY_SIZE(ibmveth_stats);
856         default:
857                 return -EOPNOTSUPP;
858         }
859 }
860
861 static void ibmveth_get_ethtool_stats(struct net_device *dev,
862                                       struct ethtool_stats *stats, u64 *data)
863 {
864         int i;
865         struct ibmveth_adapter *adapter = netdev_priv(dev);
866
867         for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
868                 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
869 }
870
871 static const struct ethtool_ops netdev_ethtool_ops = {
872         .get_drvinfo            = netdev_get_drvinfo,
873         .get_settings           = netdev_get_settings,
874         .get_link               = netdev_get_link,
875         .set_tx_csum            = ibmveth_set_tx_csum,
876         .get_rx_csum            = ibmveth_get_rx_csum,
877         .set_rx_csum            = ibmveth_set_rx_csum,
878         .get_strings            = ibmveth_get_strings,
879         .get_sset_count         = ibmveth_get_sset_count,
880         .get_ethtool_stats      = ibmveth_get_ethtool_stats,
881 };
882
883 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
884 {
885         return -EOPNOTSUPP;
886 }
887
888 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
889
890 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
891                                       struct net_device *netdev)
892 {
893         struct ibmveth_adapter *adapter = netdev_priv(netdev);
894         union ibmveth_buf_desc desc;
895         unsigned long lpar_rc;
896         unsigned long correlator;
897         unsigned long flags;
898         unsigned int retry_count;
899         unsigned int tx_dropped = 0;
900         unsigned int tx_bytes = 0;
901         unsigned int tx_packets = 0;
902         unsigned int tx_send_failed = 0;
903         unsigned int tx_map_failed = 0;
904         int used_bounce = 0;
905         unsigned long data_dma_addr;
906
907         desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
908
909         if (skb->ip_summed == CHECKSUM_PARTIAL &&
910             ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
911                 ibmveth_error_printk("tx: failed to checksum packet\n");
912                 tx_dropped++;
913                 goto out;
914         }
915
916         if (skb->ip_summed == CHECKSUM_PARTIAL) {
917                 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
918
919                 desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
920
921                 /* Need to zero out the checksum */
922                 buf[0] = 0;
923                 buf[1] = 0;
924         }
925
926         data_dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
927                                        skb->len, DMA_TO_DEVICE);
928         if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) {
929                 if (!firmware_has_feature(FW_FEATURE_CMO))
930                         ibmveth_error_printk("tx: unable to map xmit buffer\n");
931                 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
932                                           skb->len);
933                 desc.fields.address = adapter->bounce_buffer_dma;
934                 tx_map_failed++;
935                 used_bounce = 1;
936                 wmb();
937         } else
938                 desc.fields.address = data_dma_addr;
939
940         /* send the frame. Arbitrarily set retrycount to 1024 */
941         correlator = 0;
942         retry_count = 1024;
943         do {
944                 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
945                                              desc.desc, 0, 0, 0, 0, 0,
946                                              correlator, &correlator);
947         } while ((lpar_rc == H_BUSY) && (retry_count--));
948
949         if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
950                 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
951                 ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
952                                      (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
953                                      skb->len, desc.fields.address);
954                 tx_send_failed++;
955                 tx_dropped++;
956         } else {
957                 tx_packets++;
958                 tx_bytes += skb->len;
959                 netdev->trans_start = jiffies;
960         }
961
962         if (!used_bounce)
963                 dma_unmap_single(&adapter->vdev->dev, data_dma_addr,
964                                  skb->len, DMA_TO_DEVICE);
965
966 out:    spin_lock_irqsave(&adapter->stats_lock, flags);
967         netdev->stats.tx_dropped += tx_dropped;
968         netdev->stats.tx_bytes += tx_bytes;
969         netdev->stats.tx_packets += tx_packets;
970         adapter->tx_send_failed += tx_send_failed;
971         adapter->tx_map_failed += tx_map_failed;
972         spin_unlock_irqrestore(&adapter->stats_lock, flags);
973
974         dev_kfree_skb(skb);
975         return NETDEV_TX_OK;
976 }
977
978 static int ibmveth_poll(struct napi_struct *napi, int budget)
979 {
980         struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
981         struct net_device *netdev = adapter->netdev;
982         int frames_processed = 0;
983         unsigned long lpar_rc;
984
985  restart_poll:
986         do {
987                 struct sk_buff *skb;
988
989                 if (!ibmveth_rxq_pending_buffer(adapter))
990                         break;
991
992                 rmb();
993                 if (!ibmveth_rxq_buffer_valid(adapter)) {
994                         wmb(); /* suggested by larson1 */
995                         adapter->rx_invalid_buffer++;
996                         ibmveth_debug_printk("recycling invalid buffer\n");
997                         ibmveth_rxq_recycle_buffer(adapter);
998                 } else {
999                         int length = ibmveth_rxq_frame_length(adapter);
1000                         int offset = ibmveth_rxq_frame_offset(adapter);
1001                         int csum_good = ibmveth_rxq_csum_good(adapter);
1002
1003                         skb = ibmveth_rxq_get_buffer(adapter);
1004                         if (csum_good)
1005                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1006
1007                         ibmveth_rxq_harvest_buffer(adapter);
1008
1009                         skb_reserve(skb, offset);
1010                         skb_put(skb, length);
1011                         skb->protocol = eth_type_trans(skb, netdev);
1012
1013                         netif_receive_skb(skb); /* send it up */
1014
1015                         netdev->stats.rx_packets++;
1016                         netdev->stats.rx_bytes += length;
1017                         frames_processed++;
1018                 }
1019         } while (frames_processed < budget);
1020
1021         ibmveth_replenish_task(adapter);
1022
1023         if (frames_processed < budget) {
1024                 /* We think we are done - reenable interrupts,
1025                  * then check once more to make sure we are done.
1026                  */
1027                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1028                                        VIO_IRQ_ENABLE);
1029
1030                 ibmveth_assert(lpar_rc == H_SUCCESS);
1031
1032                 napi_complete(napi);
1033
1034                 if (ibmveth_rxq_pending_buffer(adapter) &&
1035                     napi_reschedule(napi)) {
1036                         lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1037                                                VIO_IRQ_DISABLE);
1038                         goto restart_poll;
1039                 }
1040         }
1041
1042         return frames_processed;
1043 }
1044
1045 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1046 {
1047         struct net_device *netdev = dev_instance;
1048         struct ibmveth_adapter *adapter = netdev_priv(netdev);
1049         unsigned long lpar_rc;
1050
1051         if (napi_schedule_prep(&adapter->napi)) {
1052                 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1053                                        VIO_IRQ_DISABLE);
1054                 ibmveth_assert(lpar_rc == H_SUCCESS);
1055                 __napi_schedule(&adapter->napi);
1056         }
1057         return IRQ_HANDLED;
1058 }
1059
1060 static void ibmveth_set_multicast_list(struct net_device *netdev)
1061 {
1062         struct ibmveth_adapter *adapter = netdev_priv(netdev);
1063         unsigned long lpar_rc;
1064
1065         if ((netdev->flags & IFF_PROMISC) ||
1066             (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
1067                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1068                                            IbmVethMcastEnableRecv |
1069                                            IbmVethMcastDisableFiltering,
1070                                            0);
1071                 if(lpar_rc != H_SUCCESS) {
1072                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1073                 }
1074         } else {
1075                 struct netdev_hw_addr *ha;
1076                 /* clear the filter table & disable filtering */
1077                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1078                                            IbmVethMcastEnableRecv |
1079                                            IbmVethMcastDisableFiltering |
1080                                            IbmVethMcastClearFilterTable,
1081                                            0);
1082                 if(lpar_rc != H_SUCCESS) {
1083                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1084                 }
1085                 /* add the addresses to the filter table */
1086                 netdev_for_each_mc_addr(ha, netdev) {
1087                         // add the multicast address to the filter table
1088                         unsigned long mcast_addr = 0;
1089                         memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
1090                         lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1091                                                    IbmVethMcastAddFilter,
1092                                                    mcast_addr);
1093                         if(lpar_rc != H_SUCCESS) {
1094                                 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1095                         }
1096                 }
1097
1098                 /* re-enable filtering */
1099                 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1100                                            IbmVethMcastEnableFiltering,
1101                                            0);
1102                 if(lpar_rc != H_SUCCESS) {
1103                         ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1104                 }
1105         }
1106 }
1107
1108 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1109 {
1110         struct ibmveth_adapter *adapter = netdev_priv(dev);
1111         struct vio_dev *viodev = adapter->vdev;
1112         int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1113         int i;
1114
1115         if (new_mtu < IBMVETH_MAX_MTU)
1116                 return -EINVAL;
1117
1118         for (i = 0; i < IbmVethNumBufferPools; i++)
1119                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1120                         break;
1121
1122         if (i == IbmVethNumBufferPools)
1123                 return -EINVAL;
1124
1125         /* Deactivate all the buffer pools so that the next loop can activate
1126            only the buffer pools necessary to hold the new MTU */
1127         for (i = 0; i < IbmVethNumBufferPools; i++)
1128                 if (adapter->rx_buff_pool[i].active) {
1129                         ibmveth_free_buffer_pool(adapter,
1130                                                  &adapter->rx_buff_pool[i]);
1131                         adapter->rx_buff_pool[i].active = 0;
1132                 }
1133
1134         /* Look for an active buffer pool that can hold the new MTU */
1135         for(i = 0; i<IbmVethNumBufferPools; i++) {
1136                 adapter->rx_buff_pool[i].active = 1;
1137
1138                 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1139                         if (netif_running(adapter->netdev)) {
1140                                 adapter->pool_config = 1;
1141                                 ibmveth_close(adapter->netdev);
1142                                 adapter->pool_config = 0;
1143                                 dev->mtu = new_mtu;
1144                                 vio_cmo_set_dev_desired(viodev,
1145                                                 ibmveth_get_desired_dma
1146                                                 (viodev));
1147                                 return ibmveth_open(adapter->netdev);
1148                         }
1149                         dev->mtu = new_mtu;
1150                         vio_cmo_set_dev_desired(viodev,
1151                                                 ibmveth_get_desired_dma
1152                                                 (viodev));
1153                         return 0;
1154                 }
1155         }
1156         return -EINVAL;
1157 }
1158
1159 #ifdef CONFIG_NET_POLL_CONTROLLER
1160 static void ibmveth_poll_controller(struct net_device *dev)
1161 {
1162         ibmveth_replenish_task(netdev_priv(dev));
1163         ibmveth_interrupt(dev->irq, dev);
1164 }
1165 #endif
1166
1167 /**
1168  * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1169  *
1170  * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1171  *
1172  * Return value:
1173  *      Number of bytes of IO data the driver will need to perform well.
1174  */
1175 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1176 {
1177         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1178         struct ibmveth_adapter *adapter;
1179         unsigned long ret;
1180         int i;
1181         int rxqentries = 1;
1182
1183         /* netdev inits at probe time along with the structures we need below*/
1184         if (netdev == NULL)
1185                 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1186
1187         adapter = netdev_priv(netdev);
1188
1189         ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1190         ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1191
1192         for (i = 0; i < IbmVethNumBufferPools; i++) {
1193                 /* add the size of the active receive buffers */
1194                 if (adapter->rx_buff_pool[i].active)
1195                         ret +=
1196                             adapter->rx_buff_pool[i].size *
1197                             IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1198                                     buff_size);
1199                 rxqentries += adapter->rx_buff_pool[i].size;
1200         }
1201         /* add the size of the receive queue entries */
1202         ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1203
1204         return ret;
1205 }
1206
1207 static const struct net_device_ops ibmveth_netdev_ops = {
1208         .ndo_open               = ibmveth_open,
1209         .ndo_stop               = ibmveth_close,
1210         .ndo_start_xmit         = ibmveth_start_xmit,
1211         .ndo_set_multicast_list = ibmveth_set_multicast_list,
1212         .ndo_do_ioctl           = ibmveth_ioctl,
1213         .ndo_change_mtu         = ibmveth_change_mtu,
1214         .ndo_validate_addr      = eth_validate_addr,
1215         .ndo_set_mac_address    = eth_mac_addr,
1216 #ifdef CONFIG_NET_POLL_CONTROLLER
1217         .ndo_poll_controller    = ibmveth_poll_controller,
1218 #endif
1219 };
1220
1221 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1222 {
1223         int rc, i;
1224         long ret;
1225         struct net_device *netdev;
1226         struct ibmveth_adapter *adapter;
1227         unsigned long set_attr, ret_attr;
1228
1229         unsigned char *mac_addr_p;
1230         unsigned int *mcastFilterSize_p;
1231
1232
1233         ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1234                                         dev->unit_address);
1235
1236         mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1237                                                 VETH_MAC_ADDR, NULL);
1238         if(!mac_addr_p) {
1239                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1240                                 "attribute\n", __FILE__, __LINE__);
1241                 return 0;
1242         }
1243
1244         mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1245                                                 VETH_MCAST_FILTER_SIZE, NULL);
1246         if(!mcastFilterSize_p) {
1247                 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1248                                 "VETH_MCAST_FILTER_SIZE attribute\n",
1249                                 __FILE__, __LINE__);
1250                 return 0;
1251         }
1252
1253         netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1254
1255         if(!netdev)
1256                 return -ENOMEM;
1257
1258         adapter = netdev_priv(netdev);
1259         dev_set_drvdata(&dev->dev, netdev);
1260
1261         adapter->vdev = dev;
1262         adapter->netdev = netdev;
1263         adapter->mcastFilterSize= *mcastFilterSize_p;
1264         adapter->pool_config = 0;
1265
1266         netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1267
1268         /*      Some older boxes running PHYP non-natively have an OF that
1269                 returns a 8-byte local-mac-address field (and the first
1270                 2 bytes have to be ignored) while newer boxes' OF return
1271                 a 6-byte field. Note that IEEE 1275 specifies that
1272                 local-mac-address must be a 6-byte field.
1273                 The RPA doc specifies that the first byte must be 10b, so
1274                 we'll just look for it to solve this 8 vs. 6 byte field issue */
1275
1276         if ((*mac_addr_p & 0x3) != 0x02)
1277                 mac_addr_p += 2;
1278
1279         adapter->mac_addr = 0;
1280         memcpy(&adapter->mac_addr, mac_addr_p, 6);
1281
1282         netdev->irq = dev->irq;
1283         netdev->netdev_ops = &ibmveth_netdev_ops;
1284         netdev->ethtool_ops = &netdev_ethtool_ops;
1285         SET_NETDEV_DEV(netdev, &dev->dev);
1286         netdev->features |= NETIF_F_LLTX;
1287         spin_lock_init(&adapter->stats_lock);
1288
1289         memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1290
1291         for(i = 0; i<IbmVethNumBufferPools; i++) {
1292                 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1293                 int error;
1294
1295                 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1296                                          pool_count[i], pool_size[i],
1297                                          pool_active[i]);
1298                 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1299                                              &dev->dev.kobj, "pool%d", i);
1300                 if (!error)
1301                         kobject_uevent(kobj, KOBJ_ADD);
1302         }
1303
1304         ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1305
1306         adapter->buffer_list_dma = DMA_ERROR_CODE;
1307         adapter->filter_list_dma = DMA_ERROR_CODE;
1308         adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1309
1310         ibmveth_debug_printk("registering netdev...\n");
1311
1312         ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
1313
1314         if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
1315             !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
1316             (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
1317                 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
1318
1319                 ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
1320
1321                 if (ret == H_SUCCESS) {
1322                         adapter->rx_csum = 1;
1323                         netdev->features |= NETIF_F_IP_CSUM;
1324                 } else
1325                         ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
1326         }
1327
1328         rc = register_netdev(netdev);
1329
1330         if(rc) {
1331                 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1332                 free_netdev(netdev);
1333                 return rc;
1334         }
1335
1336         ibmveth_debug_printk("registered\n");
1337
1338         ibmveth_proc_register_adapter(adapter);
1339
1340         return 0;
1341 }
1342
1343 static int __devexit ibmveth_remove(struct vio_dev *dev)
1344 {
1345         struct net_device *netdev = dev_get_drvdata(&dev->dev);
1346         struct ibmveth_adapter *adapter = netdev_priv(netdev);
1347         int i;
1348
1349         for(i = 0; i<IbmVethNumBufferPools; i++)
1350                 kobject_put(&adapter->rx_buff_pool[i].kobj);
1351
1352         unregister_netdev(netdev);
1353
1354         ibmveth_proc_unregister_adapter(adapter);
1355
1356         free_netdev(netdev);
1357         dev_set_drvdata(&dev->dev, NULL);
1358
1359         return 0;
1360 }
1361
1362 #ifdef CONFIG_PROC_FS
1363 static void ibmveth_proc_register_driver(void)
1364 {
1365         ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1366         if (ibmveth_proc_dir) {
1367         }
1368 }
1369
1370 static void ibmveth_proc_unregister_driver(void)
1371 {
1372         remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1373 }
1374
1375 static int ibmveth_show(struct seq_file *seq, void *v)
1376 {
1377         struct ibmveth_adapter *adapter = seq->private;
1378         char *current_mac = (char *) adapter->netdev->dev_addr;
1379         char *firmware_mac = (char *) &adapter->mac_addr;
1380
1381         seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1382
1383         seq_printf(seq, "Unit Address:    0x%x\n", adapter->vdev->unit_address);
1384         seq_printf(seq, "Current MAC:     %pM\n", current_mac);
1385         seq_printf(seq, "Firmware MAC:    %pM\n", firmware_mac);
1386
1387         seq_printf(seq, "\nAdapter Statistics:\n");
1388         seq_printf(seq, "  TX:  vio_map_single failres:      %lld\n", adapter->tx_map_failed);
1389         seq_printf(seq, "       send failures:               %lld\n", adapter->tx_send_failed);
1390         seq_printf(seq, "  RX:  replenish task cycles:       %lld\n", adapter->replenish_task_cycles);
1391         seq_printf(seq, "       alloc_skb_failures:          %lld\n", adapter->replenish_no_mem);
1392         seq_printf(seq, "       add buffer failures:         %lld\n", adapter->replenish_add_buff_failure);
1393         seq_printf(seq, "       invalid buffers:             %lld\n", adapter->rx_invalid_buffer);
1394         seq_printf(seq, "       no buffers:                  %lld\n", adapter->rx_no_buffer);
1395
1396         return 0;
1397 }
1398
1399 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1400 {
1401         return single_open(file, ibmveth_show, PDE(inode)->data);
1402 }
1403
1404 static const struct file_operations ibmveth_proc_fops = {
1405         .owner   = THIS_MODULE,
1406         .open    = ibmveth_proc_open,
1407         .read    = seq_read,
1408         .llseek  = seq_lseek,
1409         .release = single_release,
1410 };
1411
1412 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1413 {
1414         struct proc_dir_entry *entry;
1415         if (ibmveth_proc_dir) {
1416                 char u_addr[10];
1417                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1418                 entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir,
1419                                          &ibmveth_proc_fops, adapter);
1420                 if (!entry)
1421                         ibmveth_error_printk("Cannot create adapter proc entry");
1422         }
1423         return;
1424 }
1425
1426 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1427 {
1428         if (ibmveth_proc_dir) {
1429                 char u_addr[10];
1430                 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1431                 remove_proc_entry(u_addr, ibmveth_proc_dir);
1432         }
1433 }
1434
1435 #else /* CONFIG_PROC_FS */
1436 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1437 {
1438 }
1439
1440 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1441 {
1442 }
1443 static void ibmveth_proc_register_driver(void)
1444 {
1445 }
1446
1447 static void ibmveth_proc_unregister_driver(void)
1448 {
1449 }
1450 #endif /* CONFIG_PROC_FS */
1451
1452 static struct attribute veth_active_attr;
1453 static struct attribute veth_num_attr;
1454 static struct attribute veth_size_attr;
1455
1456 static ssize_t veth_pool_show(struct kobject * kobj,
1457                               struct attribute * attr, char * buf)
1458 {
1459         struct ibmveth_buff_pool *pool = container_of(kobj,
1460                                                       struct ibmveth_buff_pool,
1461                                                       kobj);
1462
1463         if (attr == &veth_active_attr)
1464                 return sprintf(buf, "%d\n", pool->active);
1465         else if (attr == &veth_num_attr)
1466                 return sprintf(buf, "%d\n", pool->size);
1467         else if (attr == &veth_size_attr)
1468                 return sprintf(buf, "%d\n", pool->buff_size);
1469         return 0;
1470 }
1471
1472 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1473 const char * buf, size_t count)
1474 {
1475         struct ibmveth_buff_pool *pool = container_of(kobj,
1476                                                       struct ibmveth_buff_pool,
1477                                                       kobj);
1478         struct net_device *netdev = dev_get_drvdata(
1479             container_of(kobj->parent, struct device, kobj));
1480         struct ibmveth_adapter *adapter = netdev_priv(netdev);
1481         long value = simple_strtol(buf, NULL, 10);
1482         long rc;
1483
1484         if (attr == &veth_active_attr) {
1485                 if (value && !pool->active) {
1486                         if (netif_running(netdev)) {
1487                                 if(ibmveth_alloc_buffer_pool(pool)) {
1488                                         ibmveth_error_printk("unable to alloc pool\n");
1489                                         return -ENOMEM;
1490                                 }
1491                                 pool->active = 1;
1492                                 adapter->pool_config = 1;
1493                                 ibmveth_close(netdev);
1494                                 adapter->pool_config = 0;
1495                                 if ((rc = ibmveth_open(netdev)))
1496                                         return rc;
1497                         } else
1498                                 pool->active = 1;
1499                 } else if (!value && pool->active) {
1500                         int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1501                         int i;
1502                         /* Make sure there is a buffer pool with buffers that
1503                            can hold a packet of the size of the MTU */
1504                         for (i = 0; i < IbmVethNumBufferPools; i++) {
1505                                 if (pool == &adapter->rx_buff_pool[i])
1506                                         continue;
1507                                 if (!adapter->rx_buff_pool[i].active)
1508                                         continue;
1509                                 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1510                                         break;
1511                         }
1512
1513                         if (i == IbmVethNumBufferPools) {
1514                                 ibmveth_error_printk("no active pool >= MTU\n");
1515                                 return -EPERM;
1516                         }
1517
1518                         if (netif_running(netdev)) {
1519                                 adapter->pool_config = 1;
1520                                 ibmveth_close(netdev);
1521                                 pool->active = 0;
1522                                 adapter->pool_config = 0;
1523                                 if ((rc = ibmveth_open(netdev)))
1524                                         return rc;
1525                         }
1526                         pool->active = 0;
1527                 }
1528         } else if (attr == &veth_num_attr) {
1529                 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1530                         return -EINVAL;
1531                 else {
1532                         if (netif_running(netdev)) {
1533                                 adapter->pool_config = 1;
1534                                 ibmveth_close(netdev);
1535                                 adapter->pool_config = 0;
1536                                 pool->size = value;
1537                                 if ((rc = ibmveth_open(netdev)))
1538                                         return rc;
1539                         } else
1540                                 pool->size = value;
1541                 }
1542         } else if (attr == &veth_size_attr) {
1543                 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1544                         return -EINVAL;
1545                 else {
1546                         if (netif_running(netdev)) {
1547                                 adapter->pool_config = 1;
1548                                 ibmveth_close(netdev);
1549                                 adapter->pool_config = 0;
1550                                 pool->buff_size = value;
1551                                 if ((rc = ibmveth_open(netdev)))
1552                                         return rc;
1553                         } else
1554                                 pool->buff_size = value;
1555                 }
1556         }
1557
1558         /* kick the interrupt handler to allocate/deallocate pools */
1559         ibmveth_interrupt(netdev->irq, netdev);
1560         return count;
1561 }
1562
1563
1564 #define ATTR(_name, _mode)      \
1565         struct attribute veth_##_name##_attr = {               \
1566         .name = __stringify(_name), .mode = _mode, \
1567         };
1568
1569 static ATTR(active, 0644);
1570 static ATTR(num, 0644);
1571 static ATTR(size, 0644);
1572
1573 static struct attribute * veth_pool_attrs[] = {
1574         &veth_active_attr,
1575         &veth_num_attr,
1576         &veth_size_attr,
1577         NULL,
1578 };
1579
1580 static const struct sysfs_ops veth_pool_ops = {
1581         .show   = veth_pool_show,
1582         .store  = veth_pool_store,
1583 };
1584
1585 static struct kobj_type ktype_veth_pool = {
1586         .release        = NULL,
1587         .sysfs_ops      = &veth_pool_ops,
1588         .default_attrs  = veth_pool_attrs,
1589 };
1590
1591
1592 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1593         { "network", "IBM,l-lan"},
1594         { "", "" }
1595 };
1596 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1597
1598 static struct vio_driver ibmveth_driver = {
1599         .id_table       = ibmveth_device_table,
1600         .probe          = ibmveth_probe,
1601         .remove         = ibmveth_remove,
1602         .get_desired_dma = ibmveth_get_desired_dma,
1603         .driver         = {
1604                 .name   = ibmveth_driver_name,
1605                 .owner  = THIS_MODULE,
1606         }
1607 };
1608
1609 static int __init ibmveth_module_init(void)
1610 {
1611         ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1612
1613         ibmveth_proc_register_driver();
1614
1615         return vio_register_driver(&ibmveth_driver);
1616 }
1617
1618 static void __exit ibmveth_module_exit(void)
1619 {
1620         vio_unregister_driver(&ibmveth_driver);
1621         ibmveth_proc_unregister_driver();
1622 }
1623
1624 module_init(ibmveth_module_init);
1625 module_exit(ibmveth_module_exit);