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[GFS2] fs/gfs2/ops_fstype.c:gfs2_get_sb_meta(): remove unused variable
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ibmveth.c
blob2802db23d3cb4be01239f580f91eb54c3b12010a
1 /**************************************************************************/
2 /* */
3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver */
4 /* Copyright (C) 2003 IBM Corp. */
5 /* Originally written by Dave Larson (larson1@us.ibm.com) */
6 /* Maintained by Santiago Leon (santil@us.ibm.com) */
7 /* */
8 /* This program is free software; you can redistribute it and/or modify */
9 /* it under the terms of the GNU General Public License as published by */
10 /* the Free Software Foundation; either version 2 of the License, or */
11 /* (at your option) any later version. */
12 /* */
13 /* This program is distributed in the hope that it will be useful, */
14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
16 /* GNU General Public License for more details. */
17 /* */
18 /* You should have received a copy of the GNU General Public License */
19 /* along with this program; if not, write to the Free Software */
20 /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
21 /* USA */
22 /* */
23 /* This module contains the implementation of a virtual ethernet device */
24 /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */
25 /* option of the RS/6000 Platform Architechture to interface with virtual */
26 /* ethernet NICs that are presented to the partition by the hypervisor. */
27 /* */
28 /**************************************************************************/
29 /*
30 TODO:
31 - remove frag processing code - no longer needed
32 - add support for sysfs
33 - possibly remove procfs support
34 */
35
36 #include <linux/module.h>
37 #include <linux/types.h>
38 #include <linux/errno.h>
39 #include <linux/ioport.h>
40 #include <linux/dma-mapping.h>
41 #include <linux/kernel.h>
42 #include <linux/netdevice.h>
43 #include <linux/etherdevice.h>
44 #include <linux/skbuff.h>
45 #include <linux/init.h>
46 #include <linux/delay.h>
47 #include <linux/mm.h>
48 #include <linux/ethtool.h>
49 #include <linux/proc_fs.h>
50 #include <asm/semaphore.h>
51 #include <asm/hvcall.h>
52 #include <asm/atomic.h>
53 #include <asm/iommu.h>
54 #include <asm/vio.h>
55 #include <asm/uaccess.h>
56 #include <linux/seq_file.h>
57
58 #include "ibmveth.h"
59
60 #undef DEBUG
61
62 #define ibmveth_printk(fmt, args...) \
63 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
64
65 #define ibmveth_error_printk(fmt, args...) \
66 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
67
68 #ifdef DEBUG
69 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
70 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
71 #define ibmveth_debug_printk(fmt, args...) \
72 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
73 #define ibmveth_assert(expr) \
74 if(!(expr)) { \
75 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
76 BUG(); \
77 }
78 #else
79 #define ibmveth_debug_printk_no_adapter(fmt, args...)
80 #define ibmveth_debug_printk(fmt, args...)
81 #define ibmveth_assert(expr)
82 #endif
83
84 static int ibmveth_open(struct net_device *dev);
85 static int ibmveth_close(struct net_device *dev);
86 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
87 static int ibmveth_poll(struct net_device *dev, int *budget);
88 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
89 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
90 static void ibmveth_set_multicast_list(struct net_device *dev);
91 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
92 static void ibmveth_proc_register_driver(void);
93 static void ibmveth_proc_unregister_driver(void);
94 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
95 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
96 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
97 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
98 static struct kobj_type ktype_veth_pool;
99
100 #ifdef CONFIG_PROC_FS
101 #define IBMVETH_PROC_DIR "net/ibmveth"
102 static struct proc_dir_entry *ibmveth_proc_dir;
103 #endif
104
105 static const char ibmveth_driver_name[] = "ibmveth";
106 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
107 #define ibmveth_driver_version "1.03"
108
109 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
110 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
111 MODULE_LICENSE("GPL");
112 MODULE_VERSION(ibmveth_driver_version);
113
114 /* simple methods of getting data from the current rxq entry */
115 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
116 {
117 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
118 }
119
120 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
121 {
122 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
123 }
124
125 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
126 {
127 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
128 }
129
130 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
131 {
132 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
133 }
134
135 /* setup the initial settings for a buffer pool */
136 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
137 {
138 pool->size = pool_size;
139 pool->index = pool_index;
140 pool->buff_size = buff_size;
141 pool->threshold = pool_size / 2;
142 pool->active = pool_active;
143 }
144
145 /* allocate and setup an buffer pool - called during open */
146 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
147 {
148 int i;
149
150 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
151
152 if(!pool->free_map) {
153 return -1;
154 }
155
156 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
157 if(!pool->dma_addr) {
158 kfree(pool->free_map);
159 pool->free_map = NULL;
160 return -1;
161 }
162
163 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
164
165 if(!pool->skbuff) {
166 kfree(pool->dma_addr);
167 pool->dma_addr = NULL;
168
169 kfree(pool->free_map);
170 pool->free_map = NULL;
171 return -1;
172 }
173
174 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
175 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
176
177 for(i = 0; i < pool->size; ++i) {
178 pool->free_map[i] = i;
179 }
180
181 atomic_set(&pool->available, 0);
182 pool->producer_index = 0;
183 pool->consumer_index = 0;
184
185 return 0;
186 }
187
188 /* replenish the buffers for a pool. note that we don't need to
189 * skb_reserve these since they are used for incoming...
190 */
191 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
192 {
193 u32 i;
194 u32 count = pool->size - atomic_read(&pool->available);
195 u32 buffers_added = 0;
196
197 mb();
198
199 for(i = 0; i < count; ++i) {
200 struct sk_buff *skb;
201 unsigned int free_index, index;
202 u64 correlator;
203 union ibmveth_buf_desc desc;
204 unsigned long lpar_rc;
205 dma_addr_t dma_addr;
206
207 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
208
209 if(!skb) {
210 ibmveth_debug_printk("replenish: unable to allocate skb\n");
211 adapter->replenish_no_mem++;
212 break;
213 }
214
215 free_index = pool->consumer_index++ % pool->size;
216 pool->consumer_index = free_index;
217 index = pool->free_map[free_index];
218
219 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
220 ibmveth_assert(pool->skbuff[index] == NULL);
221
222 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
223 pool->buff_size, DMA_FROM_DEVICE);
224
225 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
226 pool->dma_addr[index] = dma_addr;
227 pool->skbuff[index] = skb;
228
229 correlator = ((u64)pool->index << 32) | index;
230 *(u64*)skb->data = correlator;
231
232 desc.desc = 0;
233 desc.fields.valid = 1;
234 desc.fields.length = pool->buff_size;
235 desc.fields.address = dma_addr;
236
237 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
238
239 if(lpar_rc != H_SUCCESS) {
240 pool->free_map[free_index] = index;
241 pool->skbuff[index] = NULL;
242 if (pool->consumer_index == 0)
243 pool->consumer_index = pool->size - 1;
244 else
245 pool->consumer_index--;
246 dma_unmap_single(&adapter->vdev->dev,
247 pool->dma_addr[index], pool->buff_size,
248 DMA_FROM_DEVICE);
249 dev_kfree_skb_any(skb);
250 adapter->replenish_add_buff_failure++;
251 break;
252 } else {
253 buffers_added++;
254 adapter->replenish_add_buff_success++;
255 }
256 }
257
258 mb();
259 atomic_add(buffers_added, &(pool->available));
260 }
261
262 /* replenish routine */
263 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
264 {
265 int i;
266
267 adapter->replenish_task_cycles++;
268
269 for(i = 0; i < IbmVethNumBufferPools; i++)
270 if(adapter->rx_buff_pool[i].active)
271 ibmveth_replenish_buffer_pool(adapter,
272 &adapter->rx_buff_pool[i]);
273
274 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
275 }
276
277 /* empty and free ana buffer pool - also used to do cleanup in error paths */
278 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
279 {
280 int i;
281
282 kfree(pool->free_map);
283 pool->free_map = NULL;
284
285 if(pool->skbuff && pool->dma_addr) {
286 for(i = 0; i < pool->size; ++i) {
287 struct sk_buff *skb = pool->skbuff[i];
288 if(skb) {
289 dma_unmap_single(&adapter->vdev->dev,
290 pool->dma_addr[i],
291 pool->buff_size,
292 DMA_FROM_DEVICE);
293 dev_kfree_skb_any(skb);
294 pool->skbuff[i] = NULL;
295 }
296 }
297 }
298
299 if(pool->dma_addr) {
300 kfree(pool->dma_addr);
301 pool->dma_addr = NULL;
302 }
303
304 if(pool->skbuff) {
305 kfree(pool->skbuff);
306 pool->skbuff = NULL;
307 }
308 }
309
310 /* remove a buffer from a pool */
311 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
312 {
313 unsigned int pool = correlator >> 32;
314 unsigned int index = correlator & 0xffffffffUL;
315 unsigned int free_index;
316 struct sk_buff *skb;
317
318 ibmveth_assert(pool < IbmVethNumBufferPools);
319 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
320
321 skb = adapter->rx_buff_pool[pool].skbuff[index];
322
323 ibmveth_assert(skb != NULL);
324
325 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
326
327 dma_unmap_single(&adapter->vdev->dev,
328 adapter->rx_buff_pool[pool].dma_addr[index],
329 adapter->rx_buff_pool[pool].buff_size,
330 DMA_FROM_DEVICE);
331
332 free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
333 adapter->rx_buff_pool[pool].producer_index = free_index;
334 adapter->rx_buff_pool[pool].free_map[free_index] = index;
335
336 mb();
337
338 atomic_dec(&(adapter->rx_buff_pool[pool].available));
339 }
340
341 /* get the current buffer on the rx queue */
342 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
343 {
344 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
345 unsigned int pool = correlator >> 32;
346 unsigned int index = correlator & 0xffffffffUL;
347
348 ibmveth_assert(pool < IbmVethNumBufferPools);
349 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
350
351 return adapter->rx_buff_pool[pool].skbuff[index];
352 }
353
354 /* recycle the current buffer on the rx queue */
355 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
356 {
357 u32 q_index = adapter->rx_queue.index;
358 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
359 unsigned int pool = correlator >> 32;
360 unsigned int index = correlator & 0xffffffffUL;
361 union ibmveth_buf_desc desc;
362 unsigned long lpar_rc;
363
364 ibmveth_assert(pool < IbmVethNumBufferPools);
365 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
366
367 if(!adapter->rx_buff_pool[pool].active) {
368 ibmveth_rxq_harvest_buffer(adapter);
369 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
370 return;
371 }
372
373 desc.desc = 0;
374 desc.fields.valid = 1;
375 desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
376 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
377
378 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
379
380 if(lpar_rc != H_SUCCESS) {
381 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
382 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
383 }
384
385 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
386 adapter->rx_queue.index = 0;
387 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
388 }
389 }
390
391 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
392 {
393 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
394
395 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
396 adapter->rx_queue.index = 0;
397 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
398 }
399 }
400
401 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
402 {
403 int i;
404
405 if(adapter->buffer_list_addr != NULL) {
406 if(!dma_mapping_error(adapter->buffer_list_dma)) {
407 dma_unmap_single(&adapter->vdev->dev,
408 adapter->buffer_list_dma, 4096,
409 DMA_BIDIRECTIONAL);
410 adapter->buffer_list_dma = DMA_ERROR_CODE;
411 }
412 free_page((unsigned long)adapter->buffer_list_addr);
413 adapter->buffer_list_addr = NULL;
414 }
415
416 if(adapter->filter_list_addr != NULL) {
417 if(!dma_mapping_error(adapter->filter_list_dma)) {
418 dma_unmap_single(&adapter->vdev->dev,
419 adapter->filter_list_dma, 4096,
420 DMA_BIDIRECTIONAL);
421 adapter->filter_list_dma = DMA_ERROR_CODE;
422 }
423 free_page((unsigned long)adapter->filter_list_addr);
424 adapter->filter_list_addr = NULL;
425 }
426
427 if(adapter->rx_queue.queue_addr != NULL) {
428 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
429 dma_unmap_single(&adapter->vdev->dev,
430 adapter->rx_queue.queue_dma,
431 adapter->rx_queue.queue_len,
432 DMA_BIDIRECTIONAL);
433 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
434 }
435 kfree(adapter->rx_queue.queue_addr);
436 adapter->rx_queue.queue_addr = NULL;
437 }
438
439 for(i = 0; i<IbmVethNumBufferPools; i++)
440 if (adapter->rx_buff_pool[i].active)
441 ibmveth_free_buffer_pool(adapter,
442 &adapter->rx_buff_pool[i]);
443 }
444
445 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
446 union ibmveth_buf_desc rxq_desc, u64 mac_address)
447 {
448 int rc, try_again = 1;
449
450 /* After a kexec the adapter will still be open, so our attempt to
451 * open it will fail. So if we get a failure we free the adapter and
452 * try again, but only once. */
453 retry:
454 rc = h_register_logical_lan(adapter->vdev->unit_address,
455 adapter->buffer_list_dma, rxq_desc.desc,
456 adapter->filter_list_dma, mac_address);
457
458 if (rc != H_SUCCESS && try_again) {
459 do {
460 rc = h_free_logical_lan(adapter->vdev->unit_address);
461 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
462
463 try_again = 0;
464 goto retry;
465 }
466
467 return rc;
468 }
469
470 static int ibmveth_open(struct net_device *netdev)
471 {
472 struct ibmveth_adapter *adapter = netdev->priv;
473 u64 mac_address = 0;
474 int rxq_entries = 1;
475 unsigned long lpar_rc;
476 int rc;
477 union ibmveth_buf_desc rxq_desc;
478 int i;
479
480 ibmveth_debug_printk("open starting\n");
481
482 for(i = 0; i<IbmVethNumBufferPools; i++)
483 rxq_entries += adapter->rx_buff_pool[i].size;
484
485 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
486 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
487
488 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
489 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
490 ibmveth_cleanup(adapter);
491 return -ENOMEM;
492 }
493
494 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
495 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
496
497 if(!adapter->rx_queue.queue_addr) {
498 ibmveth_error_printk("unable to allocate rx queue pages\n");
499 ibmveth_cleanup(adapter);
500 return -ENOMEM;
501 }
502
503 adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
504 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
505 adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
506 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
507 adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
508 adapter->rx_queue.queue_addr,
509 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
510
511 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
512 (dma_mapping_error(adapter->filter_list_dma)) ||
513 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
514 ibmveth_error_printk("unable to map filter or buffer list pages\n");
515 ibmveth_cleanup(adapter);
516 return -ENOMEM;
517 }
518
519 adapter->rx_queue.index = 0;
520 adapter->rx_queue.num_slots = rxq_entries;
521 adapter->rx_queue.toggle = 1;
522
523 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
524 mac_address = mac_address >> 16;
525
526 rxq_desc.desc = 0;
527 rxq_desc.fields.valid = 1;
528 rxq_desc.fields.length = adapter->rx_queue.queue_len;
529 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
530
531 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
532 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
533 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
534
535 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
536
537 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
538
539 if(lpar_rc != H_SUCCESS) {
540 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
541 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
542 adapter->buffer_list_dma,
543 adapter->filter_list_dma,
544 rxq_desc.desc,
545 mac_address);
546 ibmveth_cleanup(adapter);
547 return -ENONET;
548 }
549
550 for(i = 0; i<IbmVethNumBufferPools; i++) {
551 if(!adapter->rx_buff_pool[i].active)
552 continue;
553 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
554 ibmveth_error_printk("unable to alloc pool\n");
555 adapter->rx_buff_pool[i].active = 0;
556 ibmveth_cleanup(adapter);
557 return -ENOMEM ;
558 }
559 }
560
561 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
562 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
563 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
564 do {
565 rc = h_free_logical_lan(adapter->vdev->unit_address);
566 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
567
568 ibmveth_cleanup(adapter);
569 return rc;
570 }
571
572 ibmveth_debug_printk("initial replenish cycle\n");
573 ibmveth_interrupt(netdev->irq, netdev);
574
575 netif_start_queue(netdev);
576
577 ibmveth_debug_printk("open complete\n");
578
579 return 0;
580 }
581
582 static int ibmveth_close(struct net_device *netdev)
583 {
584 struct ibmveth_adapter *adapter = netdev->priv;
585 long lpar_rc;
586
587 ibmveth_debug_printk("close starting\n");
588
589 if (!adapter->pool_config)
590 netif_stop_queue(netdev);
591
592 free_irq(netdev->irq, netdev);
593
594 do {
595 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
596 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
597
598 if(lpar_rc != H_SUCCESS)
599 {
600 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
601 lpar_rc);
602 }
603
604 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
605
606 ibmveth_cleanup(adapter);
607
608 ibmveth_debug_printk("close complete\n");
609
610 return 0;
611 }
612
613 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
614 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
615 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
616 cmd->speed = SPEED_1000;
617 cmd->duplex = DUPLEX_FULL;
618 cmd->port = PORT_FIBRE;
619 cmd->phy_address = 0;
620 cmd->transceiver = XCVR_INTERNAL;
621 cmd->autoneg = AUTONEG_ENABLE;
622 cmd->maxtxpkt = 0;
623 cmd->maxrxpkt = 1;
624 return 0;
625 }
626
627 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
628 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
629 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
630 }
631
632 static u32 netdev_get_link(struct net_device *dev) {
633 return 1;
634 }
635
636 static const struct ethtool_ops netdev_ethtool_ops = {
637 .get_drvinfo = netdev_get_drvinfo,
638 .get_settings = netdev_get_settings,
639 .get_link = netdev_get_link,
640 .get_sg = ethtool_op_get_sg,
641 .get_tx_csum = ethtool_op_get_tx_csum,
642 };
643
644 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
645 {
646 return -EOPNOTSUPP;
647 }
648
649 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
650
651 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
652 {
653 struct ibmveth_adapter *adapter = netdev->priv;
654 union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
655 unsigned long lpar_rc;
656 int nfrags = 0, curfrag;
657 unsigned long correlator;
658 unsigned long flags;
659 unsigned int retry_count;
660 unsigned int tx_dropped = 0;
661 unsigned int tx_bytes = 0;
662 unsigned int tx_packets = 0;
663 unsigned int tx_send_failed = 0;
664 unsigned int tx_map_failed = 0;
665
666
667 if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
668 tx_dropped++;
669 goto out;
670 }
671
672 memset(&desc, 0, sizeof(desc));
673
674 /* nfrags = number of frags after the initial fragment */
675 nfrags = skb_shinfo(skb)->nr_frags;
676
677 if(nfrags)
678 adapter->tx_multidesc_send++;
679
680 /* map the initial fragment */
681 desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
682 desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
683 desc[0].fields.length, DMA_TO_DEVICE);
684 desc[0].fields.valid = 1;
685
686 if(dma_mapping_error(desc[0].fields.address)) {
687 ibmveth_error_printk("tx: unable to map initial fragment\n");
688 tx_map_failed++;
689 tx_dropped++;
690 goto out;
691 }
692
693 curfrag = nfrags;
694
695 /* map fragments past the initial portion if there are any */
696 while(curfrag--) {
697 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
698 desc[curfrag+1].fields.address
699 = dma_map_single(&adapter->vdev->dev,
700 page_address(frag->page) + frag->page_offset,
701 frag->size, DMA_TO_DEVICE);
702 desc[curfrag+1].fields.length = frag->size;
703 desc[curfrag+1].fields.valid = 1;
704
705 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
706 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
707 tx_map_failed++;
708 tx_dropped++;
709 /* Free all the mappings we just created */
710 while(curfrag < nfrags) {
711 dma_unmap_single(&adapter->vdev->dev,
712 desc[curfrag+1].fields.address,
713 desc[curfrag+1].fields.length,
714 DMA_TO_DEVICE);
715 curfrag++;
716 }
717 goto out;
718 }
719 }
720
721 /* send the frame. Arbitrarily set retrycount to 1024 */
722 correlator = 0;
723 retry_count = 1024;
724 do {
725 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
726 desc[0].desc,
727 desc[1].desc,
728 desc[2].desc,
729 desc[3].desc,
730 desc[4].desc,
731 desc[5].desc,
732 correlator,
733 &correlator);
734 } while ((lpar_rc == H_BUSY) && (retry_count--));
735
736 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
737 int i;
738 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
739 for(i = 0; i < 6; i++) {
740 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
741 desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
742 }
743 tx_send_failed++;
744 tx_dropped++;
745 } else {
746 tx_packets++;
747 tx_bytes += skb->len;
748 netdev->trans_start = jiffies;
749 }
750
751 do {
752 dma_unmap_single(&adapter->vdev->dev,
753 desc[nfrags].fields.address,
754 desc[nfrags].fields.length, DMA_TO_DEVICE);
755 } while(--nfrags >= 0);
756
757 out: spin_lock_irqsave(&adapter->stats_lock, flags);
758 adapter->stats.tx_dropped += tx_dropped;
759 adapter->stats.tx_bytes += tx_bytes;
760 adapter->stats.tx_packets += tx_packets;
761 adapter->tx_send_failed += tx_send_failed;
762 adapter->tx_map_failed += tx_map_failed;
763 spin_unlock_irqrestore(&adapter->stats_lock, flags);
764
765 dev_kfree_skb(skb);
766 return 0;
767 }
768
769 static int ibmveth_poll(struct net_device *netdev, int *budget)
770 {
771 struct ibmveth_adapter *adapter = netdev->priv;
772 int max_frames_to_process = netdev->quota;
773 int frames_processed = 0;
774 int more_work = 1;
775 unsigned long lpar_rc;
776
777 restart_poll:
778 do {
779 struct net_device *netdev = adapter->netdev;
780
781 if(ibmveth_rxq_pending_buffer(adapter)) {
782 struct sk_buff *skb;
783
784 rmb();
785
786 if(!ibmveth_rxq_buffer_valid(adapter)) {
787 wmb(); /* suggested by larson1 */
788 adapter->rx_invalid_buffer++;
789 ibmveth_debug_printk("recycling invalid buffer\n");
790 ibmveth_rxq_recycle_buffer(adapter);
791 } else {
792 int length = ibmveth_rxq_frame_length(adapter);
793 int offset = ibmveth_rxq_frame_offset(adapter);
794 skb = ibmveth_rxq_get_buffer(adapter);
795
796 ibmveth_rxq_harvest_buffer(adapter);
797
798 skb_reserve(skb, offset);
799 skb_put(skb, length);
800 skb->dev = netdev;
801 skb->protocol = eth_type_trans(skb, netdev);
802
803 netif_receive_skb(skb); /* send it up */
804
805 adapter->stats.rx_packets++;
806 adapter->stats.rx_bytes += length;
807 frames_processed++;
808 netdev->last_rx = jiffies;
809 }
810 } else {
811 more_work = 0;
812 }
813 } while(more_work && (frames_processed < max_frames_to_process));
814
815 ibmveth_replenish_task(adapter);
816
817 if(more_work) {
818 /* more work to do - return that we are not done yet */
819 netdev->quota -= frames_processed;
820 *budget -= frames_processed;
821 return 1;
822 }
823
824 /* we think we are done - reenable interrupts, then check once more to make sure we are done */
825 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
826
827 ibmveth_assert(lpar_rc == H_SUCCESS);
828
829 netif_rx_complete(netdev);
830
831 if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
832 {
833 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
834 ibmveth_assert(lpar_rc == H_SUCCESS);
835 more_work = 1;
836 goto restart_poll;
837 }
838
839 netdev->quota -= frames_processed;
840 *budget -= frames_processed;
841
842 /* we really are done */
843 return 0;
844 }
845
846 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
847 {
848 struct net_device *netdev = dev_instance;
849 struct ibmveth_adapter *adapter = netdev->priv;
850 unsigned long lpar_rc;
851
852 if(netif_rx_schedule_prep(netdev)) {
853 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
854 ibmveth_assert(lpar_rc == H_SUCCESS);
855 __netif_rx_schedule(netdev);
856 }
857 return IRQ_HANDLED;
858 }
859
860 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
861 {
862 struct ibmveth_adapter *adapter = dev->priv;
863 return &adapter->stats;
864 }
865
866 static void ibmveth_set_multicast_list(struct net_device *netdev)
867 {
868 struct ibmveth_adapter *adapter = netdev->priv;
869 unsigned long lpar_rc;
870
871 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
872 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
873 IbmVethMcastEnableRecv |
874 IbmVethMcastDisableFiltering,
875 0);
876 if(lpar_rc != H_SUCCESS) {
877 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
878 }
879 } else {
880 struct dev_mc_list *mclist = netdev->mc_list;
881 int i;
882 /* clear the filter table & disable filtering */
883 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
884 IbmVethMcastEnableRecv |
885 IbmVethMcastDisableFiltering |
886 IbmVethMcastClearFilterTable,
887 0);
888 if(lpar_rc != H_SUCCESS) {
889 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
890 }
891 /* add the addresses to the filter table */
892 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
893 // add the multicast address to the filter table
894 unsigned long mcast_addr = 0;
895 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
896 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
897 IbmVethMcastAddFilter,
898 mcast_addr);
899 if(lpar_rc != H_SUCCESS) {
900 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
901 }
902 }
903
904 /* re-enable filtering */
905 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
906 IbmVethMcastEnableFiltering,
907 0);
908 if(lpar_rc != H_SUCCESS) {
909 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
910 }
911 }
912 }
913
914 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
915 {
916 struct ibmveth_adapter *adapter = dev->priv;
917 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
918 int i;
919
920 if (new_mtu < IBMVETH_MAX_MTU)
921 return -EINVAL;
922
923 /* Look for an active buffer pool that can hold the new MTU */
924 for(i = 0; i<IbmVethNumBufferPools; i++) {
925 if (!adapter->rx_buff_pool[i].active)
926 continue;
927 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
928 dev->mtu = new_mtu;
929 return 0;
930 }
931 }
932 return -EINVAL;
933 }
934
935 #ifdef CONFIG_NET_POLL_CONTROLLER
936 static void ibmveth_poll_controller(struct net_device *dev)
937 {
938 ibmveth_replenish_task(dev->priv);
939 ibmveth_interrupt(dev->irq, dev);
940 }
941 #endif
942
943 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
944 {
945 int rc, i;
946 struct net_device *netdev;
947 struct ibmveth_adapter *adapter = NULL;
948
949 unsigned char *mac_addr_p;
950 unsigned int *mcastFilterSize_p;
951
952
953 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
954 dev->unit_address);
955
956 mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
957 if(!mac_addr_p) {
958 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
959 "attribute\n", __FILE__, __LINE__);
960 return 0;
961 }
962
963 mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
964 if(!mcastFilterSize_p) {
965 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
966 "VETH_MCAST_FILTER_SIZE attribute\n",
967 __FILE__, __LINE__);
968 return 0;
969 }
970
971 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
972
973 if(!netdev)
974 return -ENOMEM;
975
976 SET_MODULE_OWNER(netdev);
977
978 adapter = netdev->priv;
979 memset(adapter, 0, sizeof(adapter));
980 dev->dev.driver_data = netdev;
981
982 adapter->vdev = dev;
983 adapter->netdev = netdev;
984 adapter->mcastFilterSize= *mcastFilterSize_p;
985 adapter->pool_config = 0;
986
987 /* Some older boxes running PHYP non-natively have an OF that
988 returns a 8-byte local-mac-address field (and the first
989 2 bytes have to be ignored) while newer boxes' OF return
990 a 6-byte field. Note that IEEE 1275 specifies that
991 local-mac-address must be a 6-byte field.
992 The RPA doc specifies that the first byte must be 10b, so
993 we'll just look for it to solve this 8 vs. 6 byte field issue */
994
995 if ((*mac_addr_p & 0x3) != 0x02)
996 mac_addr_p += 2;
997
998 adapter->mac_addr = 0;
999 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1000
1001 adapter->liobn = dev->iommu_table->it_index;
1002
1003 netdev->irq = dev->irq;
1004 netdev->open = ibmveth_open;
1005 netdev->poll = ibmveth_poll;
1006 netdev->weight = 16;
1007 netdev->stop = ibmveth_close;
1008 netdev->hard_start_xmit = ibmveth_start_xmit;
1009 netdev->get_stats = ibmveth_get_stats;
1010 netdev->set_multicast_list = ibmveth_set_multicast_list;
1011 netdev->do_ioctl = ibmveth_ioctl;
1012 netdev->ethtool_ops = &netdev_ethtool_ops;
1013 netdev->change_mtu = ibmveth_change_mtu;
1014 SET_NETDEV_DEV(netdev, &dev->dev);
1015 #ifdef CONFIG_NET_POLL_CONTROLLER
1016 netdev->poll_controller = ibmveth_poll_controller;
1017 #endif
1018 netdev->features |= NETIF_F_LLTX;
1019 spin_lock_init(&adapter->stats_lock);
1020
1021 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1022
1023 for(i = 0; i<IbmVethNumBufferPools; i++) {
1024 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1025 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1026 pool_count[i], pool_size[i],
1027 pool_active[i]);
1028 kobj->parent = &dev->dev.kobj;
1029 sprintf(kobj->name, "pool%d", i);
1030 kobj->ktype = &ktype_veth_pool;
1031 kobject_register(kobj);
1032 }
1033
1034 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1035
1036 adapter->buffer_list_dma = DMA_ERROR_CODE;
1037 adapter->filter_list_dma = DMA_ERROR_CODE;
1038 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1039
1040 ibmveth_debug_printk("registering netdev...\n");
1041
1042 rc = register_netdev(netdev);
1043
1044 if(rc) {
1045 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1046 free_netdev(netdev);
1047 return rc;
1048 }
1049
1050 ibmveth_debug_printk("registered\n");
1051
1052 ibmveth_proc_register_adapter(adapter);
1053
1054 return 0;
1055 }
1056
1057 static int __devexit ibmveth_remove(struct vio_dev *dev)
1058 {
1059 struct net_device *netdev = dev->dev.driver_data;
1060 struct ibmveth_adapter *adapter = netdev->priv;
1061 int i;
1062
1063 for(i = 0; i<IbmVethNumBufferPools; i++)
1064 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1065
1066 unregister_netdev(netdev);
1067
1068 ibmveth_proc_unregister_adapter(adapter);
1069
1070 free_netdev(netdev);
1071 return 0;
1072 }
1073
1074 #ifdef CONFIG_PROC_FS
1075 static void ibmveth_proc_register_driver(void)
1076 {
1077 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1078 if (ibmveth_proc_dir) {
1079 SET_MODULE_OWNER(ibmveth_proc_dir);
1080 }
1081 }
1082
1083 static void ibmveth_proc_unregister_driver(void)
1084 {
1085 remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1086 }
1087
1088 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1089 {
1090 if (*pos == 0) {
1091 return (void *)1;
1092 } else {
1093 return NULL;
1094 }
1095 }
1096
1097 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1098 {
1099 ++*pos;
1100 return NULL;
1101 }
1102
1103 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1104 {
1105 }
1106
1107 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1108 {
1109 struct ibmveth_adapter *adapter = seq->private;
1110 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1111 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1112
1113 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1114
1115 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1116 seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn);
1117 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1118 current_mac[0], current_mac[1], current_mac[2],
1119 current_mac[3], current_mac[4], current_mac[5]);
1120 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1121 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1122 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1123
1124 seq_printf(seq, "\nAdapter Statistics:\n");
1125 seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
1126 seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
1127 seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
1128 seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
1129 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1130 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1131 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1132 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1133 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1134 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1135
1136 return 0;
1137 }
1138 static struct seq_operations ibmveth_seq_ops = {
1139 .start = ibmveth_seq_start,
1140 .next = ibmveth_seq_next,
1141 .stop = ibmveth_seq_stop,
1142 .show = ibmveth_seq_show,
1143 };
1144
1145 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1146 {
1147 struct seq_file *seq;
1148 struct proc_dir_entry *proc;
1149 int rc;
1150
1151 rc = seq_open(file, &ibmveth_seq_ops);
1152 if (!rc) {
1153 /* recover the pointer buried in proc_dir_entry data */
1154 seq = file->private_data;
1155 proc = PDE(inode);
1156 seq->private = proc->data;
1157 }
1158 return rc;
1159 }
1160
1161 static struct file_operations ibmveth_proc_fops = {
1162 .owner = THIS_MODULE,
1163 .open = ibmveth_proc_open,
1164 .read = seq_read,
1165 .llseek = seq_lseek,
1166 .release = seq_release,
1167 };
1168
1169 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1170 {
1171 struct proc_dir_entry *entry;
1172 if (ibmveth_proc_dir) {
1173 char u_addr[10];
1174 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1175 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1176 if (!entry) {
1177 ibmveth_error_printk("Cannot create adapter proc entry");
1178 } else {
1179 entry->data = (void *) adapter;
1180 entry->proc_fops = &ibmveth_proc_fops;
1181 SET_MODULE_OWNER(entry);
1182 }
1183 }
1184 return;
1185 }
1186
1187 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1188 {
1189 if (ibmveth_proc_dir) {
1190 char u_addr[10];
1191 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1192 remove_proc_entry(u_addr, ibmveth_proc_dir);
1193 }
1194 }
1195
1196 #else /* CONFIG_PROC_FS */
1197 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1198 {
1199 }
1200
1201 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1202 {
1203 }
1204 static void ibmveth_proc_register_driver(void)
1205 {
1206 }
1207
1208 static void ibmveth_proc_unregister_driver(void)
1209 {
1210 }
1211 #endif /* CONFIG_PROC_FS */
1212
1213 static struct attribute veth_active_attr;
1214 static struct attribute veth_num_attr;
1215 static struct attribute veth_size_attr;
1216
1217 static ssize_t veth_pool_show(struct kobject * kobj,
1218 struct attribute * attr, char * buf)
1219 {
1220 struct ibmveth_buff_pool *pool = container_of(kobj,
1221 struct ibmveth_buff_pool,
1222 kobj);
1223
1224 if (attr == &veth_active_attr)
1225 return sprintf(buf, "%d\n", pool->active);
1226 else if (attr == &veth_num_attr)
1227 return sprintf(buf, "%d\n", pool->size);
1228 else if (attr == &veth_size_attr)
1229 return sprintf(buf, "%d\n", pool->buff_size);
1230 return 0;
1231 }
1232
1233 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1234 const char * buf, size_t count)
1235 {
1236 struct ibmveth_buff_pool *pool = container_of(kobj,
1237 struct ibmveth_buff_pool,
1238 kobj);
1239 struct net_device *netdev =
1240 container_of(kobj->parent, struct device, kobj)->driver_data;
1241 struct ibmveth_adapter *adapter = netdev->priv;
1242 long value = simple_strtol(buf, NULL, 10);
1243 long rc;
1244
1245 if (attr == &veth_active_attr) {
1246 if (value && !pool->active) {
1247 if(ibmveth_alloc_buffer_pool(pool)) {
1248 ibmveth_error_printk("unable to alloc pool\n");
1249 return -ENOMEM;
1250 }
1251 pool->active = 1;
1252 adapter->pool_config = 1;
1253 ibmveth_close(netdev);
1254 adapter->pool_config = 0;
1255 if ((rc = ibmveth_open(netdev)))
1256 return rc;
1257 } else if (!value && pool->active) {
1258 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1259 int i;
1260 /* Make sure there is a buffer pool with buffers that
1261 can hold a packet of the size of the MTU */
1262 for(i = 0; i<IbmVethNumBufferPools; i++) {
1263 if (pool == &adapter->rx_buff_pool[i])
1264 continue;
1265 if (!adapter->rx_buff_pool[i].active)
1266 continue;
1267 if (mtu < adapter->rx_buff_pool[i].buff_size) {
1268 pool->active = 0;
1269 h_free_logical_lan_buffer(adapter->
1270 vdev->
1271 unit_address,
1272 pool->
1273 buff_size);
1274 }
1275 }
1276 if (pool->active) {
1277 ibmveth_error_printk("no active pool >= MTU\n");
1278 return -EPERM;
1279 }
1280 }
1281 } else if (attr == &veth_num_attr) {
1282 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1283 return -EINVAL;
1284 else {
1285 adapter->pool_config = 1;
1286 ibmveth_close(netdev);
1287 adapter->pool_config = 0;
1288 pool->size = value;
1289 if ((rc = ibmveth_open(netdev)))
1290 return rc;
1291 }
1292 } else if (attr == &veth_size_attr) {
1293 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1294 return -EINVAL;
1295 else {
1296 adapter->pool_config = 1;
1297 ibmveth_close(netdev);
1298 adapter->pool_config = 0;
1299 pool->buff_size = value;
1300 if ((rc = ibmveth_open(netdev)))
1301 return rc;
1302 }
1303 }
1304
1305 /* kick the interrupt handler to allocate/deallocate pools */
1306 ibmveth_interrupt(netdev->irq, netdev);
1307 return count;
1308 }
1309
1310
1311 #define ATTR(_name, _mode) \
1312 struct attribute veth_##_name##_attr = { \
1313 .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
1314 };
1315
1316 static ATTR(active, 0644);
1317 static ATTR(num, 0644);
1318 static ATTR(size, 0644);
1319
1320 static struct attribute * veth_pool_attrs[] = {
1321 &veth_active_attr,
1322 &veth_num_attr,
1323 &veth_size_attr,
1324 NULL,
1325 };
1326
1327 static struct sysfs_ops veth_pool_ops = {
1328 .show = veth_pool_show,
1329 .store = veth_pool_store,
1330 };
1331
1332 static struct kobj_type ktype_veth_pool = {
1333 .release = NULL,
1334 .sysfs_ops = &veth_pool_ops,
1335 .default_attrs = veth_pool_attrs,
1336 };
1337
1338
1339 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1340 { "network", "IBM,l-lan"},
1341 { "", "" }
1342 };
1343 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1344
1345 static struct vio_driver ibmveth_driver = {
1346 .id_table = ibmveth_device_table,
1347 .probe = ibmveth_probe,
1348 .remove = ibmveth_remove,
1349 .driver = {
1350 .name = ibmveth_driver_name,
1351 .owner = THIS_MODULE,
1352 }
1353 };
1354
1355 static int __init ibmveth_module_init(void)
1356 {
1357 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1358
1359 ibmveth_proc_register_driver();
1360
1361 return vio_register_driver(&ibmveth_driver);
1362 }
1363
1364 static void __exit ibmveth_module_exit(void)
1365 {
1366 vio_unregister_driver(&ibmveth_driver);
1367 ibmveth_proc_unregister_driver();
1368 }
1369
1370 module_init(ibmveth_module_init);
1371 module_exit(ibmveth_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree