projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ibmveth: Add ethtool TSO handlers
[deliverable/linux.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 .get_tso = ethtool_op_get_tso,
782 .get_ufo = ethtool_op_get_ufo,
783 };
784
785 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
786 {
787 return -EOPNOTSUPP;
788 }
789
790 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
791
792 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
793 {
794 struct ibmveth_adapter *adapter = netdev->priv;
795 union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
796 unsigned long lpar_rc;
797 int nfrags = 0, curfrag;
798 unsigned long correlator;
799 unsigned long flags;
800 unsigned int retry_count;
801 unsigned int tx_dropped = 0;
802 unsigned int tx_bytes = 0;
803 unsigned int tx_packets = 0;
804 unsigned int tx_send_failed = 0;
805 unsigned int tx_map_failed = 0;
806
807
808 if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
809 tx_dropped++;
810 goto out;
811 }
812
813 memset(&desc, 0, sizeof(desc));
814
815 /* nfrags = number of frags after the initial fragment */
816 nfrags = skb_shinfo(skb)->nr_frags;
817
818 if(nfrags)
819 adapter->tx_multidesc_send++;
820
821 /* map the initial fragment */
822 desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
823 desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
824 desc[0].fields.length, DMA_TO_DEVICE);
825 desc[0].fields.valid = 1;
826
827 if (skb->ip_summed == CHECKSUM_PARTIAL &&
828 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
829 ibmveth_error_printk("tx: failed to checksum packet\n");
830 tx_dropped++;
831 goto out;
832 }
833
834 if (skb->ip_summed == CHECKSUM_PARTIAL) {
835 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
836
837 desc[0].fields.no_csum = 1;
838 desc[0].fields.csum_good = 1;
839
840 /* Need to zero out the checksum */
841 buf[0] = 0;
842 buf[1] = 0;
843 }
844
845 if(dma_mapping_error(desc[0].fields.address)) {
846 ibmveth_error_printk("tx: unable to map initial fragment\n");
847 tx_map_failed++;
848 tx_dropped++;
849 goto out;
850 }
851
852 curfrag = nfrags;
853
854 /* map fragments past the initial portion if there are any */
855 while(curfrag--) {
856 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
857 desc[curfrag+1].fields.address
858 = dma_map_single(&adapter->vdev->dev,
859 page_address(frag->page) + frag->page_offset,
860 frag->size, DMA_TO_DEVICE);
861 desc[curfrag+1].fields.length = frag->size;
862 desc[curfrag+1].fields.valid = 1;
863 if (skb->ip_summed == CHECKSUM_PARTIAL) {
864 desc[curfrag+1].fields.no_csum = 1;
865 desc[curfrag+1].fields.csum_good = 1;
866 }
867
868 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
869 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
870 tx_map_failed++;
871 tx_dropped++;
872 /* Free all the mappings we just created */
873 while(curfrag < nfrags) {
874 dma_unmap_single(&adapter->vdev->dev,
875 desc[curfrag+1].fields.address,
876 desc[curfrag+1].fields.length,
877 DMA_TO_DEVICE);
878 curfrag++;
879 }
880 goto out;
881 }
882 }
883
884 /* send the frame. Arbitrarily set retrycount to 1024 */
885 correlator = 0;
886 retry_count = 1024;
887 do {
888 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
889 desc[0].desc,
890 desc[1].desc,
891 desc[2].desc,
892 desc[3].desc,
893 desc[4].desc,
894 desc[5].desc,
895 correlator,
896 &correlator);
897 } while ((lpar_rc == H_BUSY) && (retry_count--));
898
899 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
900 int i;
901 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
902 for(i = 0; i < 6; i++) {
903 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
904 desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
905 }
906 tx_send_failed++;
907 tx_dropped++;
908 } else {
909 tx_packets++;
910 tx_bytes += skb->len;
911 netdev->trans_start = jiffies;
912 }
913
914 do {
915 dma_unmap_single(&adapter->vdev->dev,
916 desc[nfrags].fields.address,
917 desc[nfrags].fields.length, DMA_TO_DEVICE);
918 } while(--nfrags >= 0);
919
920 out: spin_lock_irqsave(&adapter->stats_lock, flags);
921 adapter->stats.tx_dropped += tx_dropped;
922 adapter->stats.tx_bytes += tx_bytes;
923 adapter->stats.tx_packets += tx_packets;
924 adapter->tx_send_failed += tx_send_failed;
925 adapter->tx_map_failed += tx_map_failed;
926 spin_unlock_irqrestore(&adapter->stats_lock, flags);
927
928 dev_kfree_skb(skb);
929 return 0;
930 }
931
932 static int ibmveth_poll(struct napi_struct *napi, int budget)
933 {
934 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
935 struct net_device *netdev = adapter->netdev;
936 int frames_processed = 0;
937 unsigned long lpar_rc;
938
939 restart_poll:
940 do {
941 struct sk_buff *skb;
942
943 if (!ibmveth_rxq_pending_buffer(adapter))
944 break;
945
946 rmb();
947 if (!ibmveth_rxq_buffer_valid(adapter)) {
948 wmb(); /* suggested by larson1 */
949 adapter->rx_invalid_buffer++;
950 ibmveth_debug_printk("recycling invalid buffer\n");
951 ibmveth_rxq_recycle_buffer(adapter);
952 } else {
953 int length = ibmveth_rxq_frame_length(adapter);
954 int offset = ibmveth_rxq_frame_offset(adapter);
955 int csum_good = ibmveth_rxq_csum_good(adapter);
956
957 skb = ibmveth_rxq_get_buffer(adapter);
958 if (csum_good)
959 skb->ip_summed = CHECKSUM_UNNECESSARY;
960
961 ibmveth_rxq_harvest_buffer(adapter);
962
963 skb_reserve(skb, offset);
964 skb_put(skb, length);
965 skb->protocol = eth_type_trans(skb, netdev);
966
967 netif_receive_skb(skb); /* send it up */
968
969 adapter->stats.rx_packets++;
970 adapter->stats.rx_bytes += length;
971 frames_processed++;
972 netdev->last_rx = jiffies;
973 }
974 } while (frames_processed < budget);
975
976 ibmveth_replenish_task(adapter);
977
978 if (frames_processed < budget) {
979 /* We think we are done - reenable interrupts,
980 * then check once more to make sure we are done.
981 */
982 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
983 VIO_IRQ_ENABLE);
984
985 ibmveth_assert(lpar_rc == H_SUCCESS);
986
987 netif_rx_complete(netdev, napi);
988
989 if (ibmveth_rxq_pending_buffer(adapter) &&
990 netif_rx_reschedule(netdev, napi)) {
991 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
992 VIO_IRQ_DISABLE);
993 goto restart_poll;
994 }
995 }
996
997 return frames_processed;
998 }
999
1000 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1001 {
1002 struct net_device *netdev = dev_instance;
1003 struct ibmveth_adapter *adapter = netdev->priv;
1004 unsigned long lpar_rc;
1005
1006 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1007 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1008 VIO_IRQ_DISABLE);
1009 ibmveth_assert(lpar_rc == H_SUCCESS);
1010 __netif_rx_schedule(netdev, &adapter->napi);
1011 }
1012 return IRQ_HANDLED;
1013 }
1014
1015 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
1016 {
1017 struct ibmveth_adapter *adapter = dev->priv;
1018 return &adapter->stats;
1019 }
1020
1021 static void ibmveth_set_multicast_list(struct net_device *netdev)
1022 {
1023 struct ibmveth_adapter *adapter = netdev->priv;
1024 unsigned long lpar_rc;
1025
1026 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
1027 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1028 IbmVethMcastEnableRecv |
1029 IbmVethMcastDisableFiltering,
1030 0);
1031 if(lpar_rc != H_SUCCESS) {
1032 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1033 }
1034 } else {
1035 struct dev_mc_list *mclist = netdev->mc_list;
1036 int i;
1037 /* clear the filter table & disable filtering */
1038 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1039 IbmVethMcastEnableRecv |
1040 IbmVethMcastDisableFiltering |
1041 IbmVethMcastClearFilterTable,
1042 0);
1043 if(lpar_rc != H_SUCCESS) {
1044 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1045 }
1046 /* add the addresses to the filter table */
1047 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
1048 // add the multicast address to the filter table
1049 unsigned long mcast_addr = 0;
1050 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
1051 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1052 IbmVethMcastAddFilter,
1053 mcast_addr);
1054 if(lpar_rc != H_SUCCESS) {
1055 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1056 }
1057 }
1058
1059 /* re-enable filtering */
1060 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1061 IbmVethMcastEnableFiltering,
1062 0);
1063 if(lpar_rc != H_SUCCESS) {
1064 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1065 }
1066 }
1067 }
1068
1069 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1070 {
1071 struct ibmveth_adapter *adapter = dev->priv;
1072 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1073 int reinit = 0;
1074 int i, rc;
1075
1076 if (new_mtu < IBMVETH_MAX_MTU)
1077 return -EINVAL;
1078
1079 for (i = 0; i < IbmVethNumBufferPools; i++)
1080 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1081 break;
1082
1083 if (i == IbmVethNumBufferPools)
1084 return -EINVAL;
1085
1086 /* Look for an active buffer pool that can hold the new MTU */
1087 for(i = 0; i<IbmVethNumBufferPools; i++) {
1088 if (!adapter->rx_buff_pool[i].active) {
1089 adapter->rx_buff_pool[i].active = 1;
1090 reinit = 1;
1091 }
1092
1093 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1094 if (reinit && netif_running(adapter->netdev)) {
1095 adapter->pool_config = 1;
1096 ibmveth_close(adapter->netdev);
1097 adapter->pool_config = 0;
1098 dev->mtu = new_mtu;
1099 if ((rc = ibmveth_open(adapter->netdev)))
1100 return rc;
1101 } else
1102 dev->mtu = new_mtu;
1103 return 0;
1104 }
1105 }
1106 return -EINVAL;
1107 }
1108
1109 #ifdef CONFIG_NET_POLL_CONTROLLER
1110 static void ibmveth_poll_controller(struct net_device *dev)
1111 {
1112 ibmveth_replenish_task(dev->priv);
1113 ibmveth_interrupt(dev->irq, dev);
1114 }
1115 #endif
1116
1117 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1118 {
1119 int rc, i;
1120 long ret;
1121 struct net_device *netdev;
1122 struct ibmveth_adapter *adapter;
1123 union ibmveth_illan_attributes set_attr, ret_attr;
1124
1125 unsigned char *mac_addr_p;
1126 unsigned int *mcastFilterSize_p;
1127
1128
1129 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1130 dev->unit_address);
1131
1132 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1133 VETH_MAC_ADDR, NULL);
1134 if(!mac_addr_p) {
1135 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1136 "attribute\n", __FILE__, __LINE__);
1137 return 0;
1138 }
1139
1140 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1141 VETH_MCAST_FILTER_SIZE, NULL);
1142 if(!mcastFilterSize_p) {
1143 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1144 "VETH_MCAST_FILTER_SIZE attribute\n",
1145 __FILE__, __LINE__);
1146 return 0;
1147 }
1148
1149 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1150
1151 if(!netdev)
1152 return -ENOMEM;
1153
1154 SET_MODULE_OWNER(netdev);
1155
1156 adapter = netdev->priv;
1157 dev->dev.driver_data = netdev;
1158
1159 adapter->vdev = dev;
1160 adapter->netdev = netdev;
1161 adapter->mcastFilterSize= *mcastFilterSize_p;
1162 adapter->pool_config = 0;
1163
1164 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1165
1166 /* Some older boxes running PHYP non-natively have an OF that
1167 returns a 8-byte local-mac-address field (and the first
1168 2 bytes have to be ignored) while newer boxes' OF return
1169 a 6-byte field. Note that IEEE 1275 specifies that
1170 local-mac-address must be a 6-byte field.
1171 The RPA doc specifies that the first byte must be 10b, so
1172 we'll just look for it to solve this 8 vs. 6 byte field issue */
1173
1174 if ((*mac_addr_p & 0x3) != 0x02)
1175 mac_addr_p += 2;
1176
1177 adapter->mac_addr = 0;
1178 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1179
1180 netdev->irq = dev->irq;
1181 netdev->open = ibmveth_open;
1182 netdev->stop = ibmveth_close;
1183 netdev->hard_start_xmit = ibmveth_start_xmit;
1184 netdev->get_stats = ibmveth_get_stats;
1185 netdev->set_multicast_list = ibmveth_set_multicast_list;
1186 netdev->do_ioctl = ibmveth_ioctl;
1187 netdev->ethtool_ops = &netdev_ethtool_ops;
1188 netdev->change_mtu = ibmveth_change_mtu;
1189 SET_NETDEV_DEV(netdev, &dev->dev);
1190 #ifdef CONFIG_NET_POLL_CONTROLLER
1191 netdev->poll_controller = ibmveth_poll_controller;
1192 #endif
1193 netdev->features |= NETIF_F_LLTX;
1194 spin_lock_init(&adapter->stats_lock);
1195
1196 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1197
1198 for(i = 0; i<IbmVethNumBufferPools; i++) {
1199 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1200 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1201 pool_count[i], pool_size[i],
1202 pool_active[i]);
1203 kobj->parent = &dev->dev.kobj;
1204 sprintf(kobj->name, "pool%d", i);
1205 kobj->ktype = &ktype_veth_pool;
1206 kobject_register(kobj);
1207 }
1208
1209 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1210
1211 adapter->buffer_list_dma = DMA_ERROR_CODE;
1212 adapter->filter_list_dma = DMA_ERROR_CODE;
1213 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1214
1215 ibmveth_debug_printk("registering netdev...\n");
1216
1217 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc);
1218
1219 if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
1220 !ret_attr.fields.trunk_priority &&
1221 ret_attr.fields.csum_offload_padded_pkt_support) {
1222 set_attr.desc = 0;
1223 set_attr.fields.tcp_csum_offload_ipv4 = 1;
1224
1225 ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc,
1226 &ret_attr.desc);
1227
1228 if (ret == H_SUCCESS) {
1229 adapter->rx_csum = 1;
1230 netdev->features |= NETIF_F_IP_CSUM;
1231 } else
1232 ret = h_illan_attributes(dev->unit_address, set_attr.desc,
1233 0, &ret_attr.desc);
1234 }
1235
1236 rc = register_netdev(netdev);
1237
1238 if(rc) {
1239 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1240 free_netdev(netdev);
1241 return rc;
1242 }
1243
1244 ibmveth_debug_printk("registered\n");
1245
1246 ibmveth_proc_register_adapter(adapter);
1247
1248 return 0;
1249 }
1250
1251 static int __devexit ibmveth_remove(struct vio_dev *dev)
1252 {
1253 struct net_device *netdev = dev->dev.driver_data;
1254 struct ibmveth_adapter *adapter = netdev->priv;
1255 int i;
1256
1257 for(i = 0; i<IbmVethNumBufferPools; i++)
1258 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1259
1260 unregister_netdev(netdev);
1261
1262 ibmveth_proc_unregister_adapter(adapter);
1263
1264 free_netdev(netdev);
1265 return 0;
1266 }
1267
1268 #ifdef CONFIG_PROC_FS
1269 static void ibmveth_proc_register_driver(void)
1270 {
1271 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1272 if (ibmveth_proc_dir) {
1273 SET_MODULE_OWNER(ibmveth_proc_dir);
1274 }
1275 }
1276
1277 static void ibmveth_proc_unregister_driver(void)
1278 {
1279 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1280 }
1281
1282 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1283 {
1284 if (*pos == 0) {
1285 return (void *)1;
1286 } else {
1287 return NULL;
1288 }
1289 }
1290
1291 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1292 {
1293 ++*pos;
1294 return NULL;
1295 }
1296
1297 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1298 {
1299 }
1300
1301 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1302 {
1303 struct ibmveth_adapter *adapter = seq->private;
1304 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1305 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1306
1307 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1308
1309 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1310 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1311 current_mac[0], current_mac[1], current_mac[2],
1312 current_mac[3], current_mac[4], current_mac[5]);
1313 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1314 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1315 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1316
1317 seq_printf(seq, "\nAdapter Statistics:\n");
1318 seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
1319 seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
1320 seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
1321 seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
1322 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1323 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1324 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1325 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1326 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1327 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1328
1329 return 0;
1330 }
1331 static struct seq_operations ibmveth_seq_ops = {
1332 .start = ibmveth_seq_start,
1333 .next = ibmveth_seq_next,
1334 .stop = ibmveth_seq_stop,
1335 .show = ibmveth_seq_show,
1336 };
1337
1338 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1339 {
1340 struct seq_file *seq;
1341 struct proc_dir_entry *proc;
1342 int rc;
1343
1344 rc = seq_open(file, &ibmveth_seq_ops);
1345 if (!rc) {
1346 /* recover the pointer buried in proc_dir_entry data */
1347 seq = file->private_data;
1348 proc = PDE(inode);
1349 seq->private = proc->data;
1350 }
1351 return rc;
1352 }
1353
1354 static const struct file_operations ibmveth_proc_fops = {
1355 .owner = THIS_MODULE,
1356 .open = ibmveth_proc_open,
1357 .read = seq_read,
1358 .llseek = seq_lseek,
1359 .release = seq_release,
1360 };
1361
1362 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1363 {
1364 struct proc_dir_entry *entry;
1365 if (ibmveth_proc_dir) {
1366 char u_addr[10];
1367 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1368 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1369 if (!entry) {
1370 ibmveth_error_printk("Cannot create adapter proc entry");
1371 } else {
1372 entry->data = (void *) adapter;
1373 entry->proc_fops = &ibmveth_proc_fops;
1374 SET_MODULE_OWNER(entry);
1375 }
1376 }
1377 return;
1378 }
1379
1380 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1381 {
1382 if (ibmveth_proc_dir) {
1383 char u_addr[10];
1384 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1385 remove_proc_entry(u_addr, ibmveth_proc_dir);
1386 }
1387 }
1388
1389 #else /* CONFIG_PROC_FS */
1390 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1391 {
1392 }
1393
1394 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1395 {
1396 }
1397 static void ibmveth_proc_register_driver(void)
1398 {
1399 }
1400
1401 static void ibmveth_proc_unregister_driver(void)
1402 {
1403 }
1404 #endif /* CONFIG_PROC_FS */
1405
1406 static struct attribute veth_active_attr;
1407 static struct attribute veth_num_attr;
1408 static struct attribute veth_size_attr;
1409
1410 static ssize_t veth_pool_show(struct kobject * kobj,
1411 struct attribute * attr, char * buf)
1412 {
1413 struct ibmveth_buff_pool *pool = container_of(kobj,
1414 struct ibmveth_buff_pool,
1415 kobj);
1416
1417 if (attr == &veth_active_attr)
1418 return sprintf(buf, "%d\n", pool->active);
1419 else if (attr == &veth_num_attr)
1420 return sprintf(buf, "%d\n", pool->size);
1421 else if (attr == &veth_size_attr)
1422 return sprintf(buf, "%d\n", pool->buff_size);
1423 return 0;
1424 }
1425
1426 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1427 const char * buf, size_t count)
1428 {
1429 struct ibmveth_buff_pool *pool = container_of(kobj,
1430 struct ibmveth_buff_pool,
1431 kobj);
1432 struct net_device *netdev =
1433 container_of(kobj->parent, struct device, kobj)->driver_data;
1434 struct ibmveth_adapter *adapter = netdev->priv;
1435 long value = simple_strtol(buf, NULL, 10);
1436 long rc;
1437
1438 if (attr == &veth_active_attr) {
1439 if (value && !pool->active) {
1440 if (netif_running(netdev)) {
1441 if(ibmveth_alloc_buffer_pool(pool)) {
1442 ibmveth_error_printk("unable to alloc pool\n");
1443 return -ENOMEM;
1444 }
1445 pool->active = 1;
1446 adapter->pool_config = 1;
1447 ibmveth_close(netdev);
1448 adapter->pool_config = 0;
1449 if ((rc = ibmveth_open(netdev)))
1450 return rc;
1451 } else
1452 pool->active = 1;
1453 } else if (!value && pool->active) {
1454 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1455 int i;
1456 /* Make sure there is a buffer pool with buffers that
1457 can hold a packet of the size of the MTU */
1458 for (i = 0; i < IbmVethNumBufferPools; i++) {
1459 if (pool == &adapter->rx_buff_pool[i])
1460 continue;
1461 if (!adapter->rx_buff_pool[i].active)
1462 continue;
1463 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1464 break;
1465 }
1466
1467 if (i == IbmVethNumBufferPools) {
1468 ibmveth_error_printk("no active pool >= MTU\n");
1469 return -EPERM;
1470 }
1471
1472 pool->active = 0;
1473 if (netif_running(netdev)) {
1474 adapter->pool_config = 1;
1475 ibmveth_close(netdev);
1476 adapter->pool_config = 0;
1477 if ((rc = ibmveth_open(netdev)))
1478 return rc;
1479 }
1480 }
1481 } else if (attr == &veth_num_attr) {
1482 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1483 return -EINVAL;
1484 else {
1485 if (netif_running(netdev)) {
1486 adapter->pool_config = 1;
1487 ibmveth_close(netdev);
1488 adapter->pool_config = 0;
1489 pool->size = value;
1490 if ((rc = ibmveth_open(netdev)))
1491 return rc;
1492 } else
1493 pool->size = value;
1494 }
1495 } else if (attr == &veth_size_attr) {
1496 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1497 return -EINVAL;
1498 else {
1499 if (netif_running(netdev)) {
1500 adapter->pool_config = 1;
1501 ibmveth_close(netdev);
1502 adapter->pool_config = 0;
1503 pool->buff_size = value;
1504 if ((rc = ibmveth_open(netdev)))
1505 return rc;
1506 } else
1507 pool->buff_size = value;
1508 }
1509 }
1510
1511 /* kick the interrupt handler to allocate/deallocate pools */
1512 ibmveth_interrupt(netdev->irq, netdev);
1513 return count;
1514 }
1515
1516
1517 #define ATTR(_name, _mode) \
1518 struct attribute veth_##_name##_attr = { \
1519 .name = __stringify(_name), .mode = _mode, \
1520 };
1521
1522 static ATTR(active, 0644);
1523 static ATTR(num, 0644);
1524 static ATTR(size, 0644);
1525
1526 static struct attribute * veth_pool_attrs[] = {
1527 &veth_active_attr,
1528 &veth_num_attr,
1529 &veth_size_attr,
1530 NULL,
1531 };
1532
1533 static struct sysfs_ops veth_pool_ops = {
1534 .show = veth_pool_show,
1535 .store = veth_pool_store,
1536 };
1537
1538 static struct kobj_type ktype_veth_pool = {
1539 .release = NULL,
1540 .sysfs_ops = &veth_pool_ops,
1541 .default_attrs = veth_pool_attrs,
1542 };
1543
1544
1545 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1546 { "network", "IBM,l-lan"},
1547 { "", "" }
1548 };
1549 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1550
1551 static struct vio_driver ibmveth_driver = {
1552 .id_table = ibmveth_device_table,
1553 .probe = ibmveth_probe,
1554 .remove = ibmveth_remove,
1555 .driver = {
1556 .name = ibmveth_driver_name,
1557 .owner = THIS_MODULE,
1558 }
1559 };
1560
1561 static int __init ibmveth_module_init(void)
1562 {
1563 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1564
1565 ibmveth_proc_register_driver();
1566
1567 return vio_register_driver(&ibmveth_driver);
1568 }
1569
1570 static void __exit ibmveth_module_exit(void)
1571 {
1572 vio_unregister_driver(&ibmveth_driver);
1573 ibmveth_proc_unregister_driver();
1574 }
1575
1576 module_init(ibmveth_module_init);
1577 module_exit(ibmveth_module_exit);
Linux kernel - Deliverables
This page took 0.063895 seconds and 6 git commands to generate.