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[PATCH] ibmveth: Add netpoll function
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ibmveth.c
blobbd79d67c0e976e77fcf57066864b8ddad2190799
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, struct pt_regs *regs);
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 index = pool->free_map[free_index];
217
218 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
219 ibmveth_assert(pool->skbuff[index] == NULL);
220
221 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
222 pool->buff_size, DMA_FROM_DEVICE);
223
224 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
225 pool->dma_addr[index] = dma_addr;
226 pool->skbuff[index] = skb;
227
228 correlator = ((u64)pool->index << 32) | index;
229 *(u64*)skb->data = correlator;
230
231 desc.desc = 0;
232 desc.fields.valid = 1;
233 desc.fields.length = pool->buff_size;
234 desc.fields.address = dma_addr;
235
236 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
237
238 if(lpar_rc != H_SUCCESS) {
239 pool->free_map[free_index] = index;
240 pool->skbuff[index] = NULL;
241 pool->consumer_index--;
242 dma_unmap_single(&adapter->vdev->dev,
243 pool->dma_addr[index], pool->buff_size,
244 DMA_FROM_DEVICE);
245 dev_kfree_skb_any(skb);
246 adapter->replenish_add_buff_failure++;
247 break;
248 } else {
249 buffers_added++;
250 adapter->replenish_add_buff_success++;
251 }
252 }
253
254 mb();
255 atomic_add(buffers_added, &(pool->available));
256 }
257
258 /* replenish routine */
259 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
260 {
261 int i;
262
263 adapter->replenish_task_cycles++;
264
265 for(i = 0; i < IbmVethNumBufferPools; i++)
266 if(adapter->rx_buff_pool[i].active)
267 ibmveth_replenish_buffer_pool(adapter,
268 &adapter->rx_buff_pool[i]);
269
270 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
271 }
272
273 /* empty and free ana buffer pool - also used to do cleanup in error paths */
274 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
275 {
276 int i;
277
278 kfree(pool->free_map);
279 pool->free_map = NULL;
280
281 if(pool->skbuff && pool->dma_addr) {
282 for(i = 0; i < pool->size; ++i) {
283 struct sk_buff *skb = pool->skbuff[i];
284 if(skb) {
285 dma_unmap_single(&adapter->vdev->dev,
286 pool->dma_addr[i],
287 pool->buff_size,
288 DMA_FROM_DEVICE);
289 dev_kfree_skb_any(skb);
290 pool->skbuff[i] = NULL;
291 }
292 }
293 }
294
295 if(pool->dma_addr) {
296 kfree(pool->dma_addr);
297 pool->dma_addr = NULL;
298 }
299
300 if(pool->skbuff) {
301 kfree(pool->skbuff);
302 pool->skbuff = NULL;
303 }
304 }
305
306 /* remove a buffer from a pool */
307 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
308 {
309 unsigned int pool = correlator >> 32;
310 unsigned int index = correlator & 0xffffffffUL;
311 unsigned int free_index;
312 struct sk_buff *skb;
313
314 ibmveth_assert(pool < IbmVethNumBufferPools);
315 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
316
317 skb = adapter->rx_buff_pool[pool].skbuff[index];
318
319 ibmveth_assert(skb != NULL);
320
321 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
322
323 dma_unmap_single(&adapter->vdev->dev,
324 adapter->rx_buff_pool[pool].dma_addr[index],
325 adapter->rx_buff_pool[pool].buff_size,
326 DMA_FROM_DEVICE);
327
328 free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
329 adapter->rx_buff_pool[pool].free_map[free_index] = index;
330
331 mb();
332
333 atomic_dec(&(adapter->rx_buff_pool[pool].available));
334 }
335
336 /* get the current buffer on the rx queue */
337 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
338 {
339 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
340 unsigned int pool = correlator >> 32;
341 unsigned int index = correlator & 0xffffffffUL;
342
343 ibmveth_assert(pool < IbmVethNumBufferPools);
344 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
345
346 return adapter->rx_buff_pool[pool].skbuff[index];
347 }
348
349 /* recycle the current buffer on the rx queue */
350 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
351 {
352 u32 q_index = adapter->rx_queue.index;
353 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
354 unsigned int pool = correlator >> 32;
355 unsigned int index = correlator & 0xffffffffUL;
356 union ibmveth_buf_desc desc;
357 unsigned long lpar_rc;
358
359 ibmveth_assert(pool < IbmVethNumBufferPools);
360 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
361
362 if(!adapter->rx_buff_pool[pool].active) {
363 ibmveth_rxq_harvest_buffer(adapter);
364 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
365 return;
366 }
367
368 desc.desc = 0;
369 desc.fields.valid = 1;
370 desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
371 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
372
373 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
374
375 if(lpar_rc != H_SUCCESS) {
376 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
377 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
378 }
379
380 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
381 adapter->rx_queue.index = 0;
382 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
383 }
384 }
385
386 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
387 {
388 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
389
390 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
391 adapter->rx_queue.index = 0;
392 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
393 }
394 }
395
396 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
397 {
398 int i;
399
400 if(adapter->buffer_list_addr != NULL) {
401 if(!dma_mapping_error(adapter->buffer_list_dma)) {
402 dma_unmap_single(&adapter->vdev->dev,
403 adapter->buffer_list_dma, 4096,
404 DMA_BIDIRECTIONAL);
405 adapter->buffer_list_dma = DMA_ERROR_CODE;
406 }
407 free_page((unsigned long)adapter->buffer_list_addr);
408 adapter->buffer_list_addr = NULL;
409 }
410
411 if(adapter->filter_list_addr != NULL) {
412 if(!dma_mapping_error(adapter->filter_list_dma)) {
413 dma_unmap_single(&adapter->vdev->dev,
414 adapter->filter_list_dma, 4096,
415 DMA_BIDIRECTIONAL);
416 adapter->filter_list_dma = DMA_ERROR_CODE;
417 }
418 free_page((unsigned long)adapter->filter_list_addr);
419 adapter->filter_list_addr = NULL;
420 }
421
422 if(adapter->rx_queue.queue_addr != NULL) {
423 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
424 dma_unmap_single(&adapter->vdev->dev,
425 adapter->rx_queue.queue_dma,
426 adapter->rx_queue.queue_len,
427 DMA_BIDIRECTIONAL);
428 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
429 }
430 kfree(adapter->rx_queue.queue_addr);
431 adapter->rx_queue.queue_addr = NULL;
432 }
433
434 for(i = 0; i<IbmVethNumBufferPools; i++)
435 if (adapter->rx_buff_pool[i].active)
436 ibmveth_free_buffer_pool(adapter,
437 &adapter->rx_buff_pool[i]);
438 }
439
440 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
441 union ibmveth_buf_desc rxq_desc, u64 mac_address)
442 {
443 int rc, try_again = 1;
444
445 /* After a kexec the adapter will still be open, so our attempt to
446 * open it will fail. So if we get a failure we free the adapter and
447 * try again, but only once. */
448 retry:
449 rc = h_register_logical_lan(adapter->vdev->unit_address,
450 adapter->buffer_list_dma, rxq_desc.desc,
451 adapter->filter_list_dma, mac_address);
452
453 if (rc != H_SUCCESS && try_again) {
454 do {
455 rc = h_free_logical_lan(adapter->vdev->unit_address);
456 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
457
458 try_again = 0;
459 goto retry;
460 }
461
462 return rc;
463 }
464
465 static int ibmveth_open(struct net_device *netdev)
466 {
467 struct ibmveth_adapter *adapter = netdev->priv;
468 u64 mac_address = 0;
469 int rxq_entries = 1;
470 unsigned long lpar_rc;
471 int rc;
472 union ibmveth_buf_desc rxq_desc;
473 int i;
474
475 ibmveth_debug_printk("open starting\n");
476
477 for(i = 0; i<IbmVethNumBufferPools; i++)
478 rxq_entries += adapter->rx_buff_pool[i].size;
479
480 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
481 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
482
483 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
484 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
485 ibmveth_cleanup(adapter);
486 return -ENOMEM;
487 }
488
489 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
490 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
491
492 if(!adapter->rx_queue.queue_addr) {
493 ibmveth_error_printk("unable to allocate rx queue pages\n");
494 ibmveth_cleanup(adapter);
495 return -ENOMEM;
496 }
497
498 adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
499 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
500 adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
501 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
502 adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
503 adapter->rx_queue.queue_addr,
504 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
505
506 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
507 (dma_mapping_error(adapter->filter_list_dma)) ||
508 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
509 ibmveth_error_printk("unable to map filter or buffer list pages\n");
510 ibmveth_cleanup(adapter);
511 return -ENOMEM;
512 }
513
514 adapter->rx_queue.index = 0;
515 adapter->rx_queue.num_slots = rxq_entries;
516 adapter->rx_queue.toggle = 1;
517
518 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
519 mac_address = mac_address >> 16;
520
521 rxq_desc.desc = 0;
522 rxq_desc.fields.valid = 1;
523 rxq_desc.fields.length = adapter->rx_queue.queue_len;
524 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
525
526 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
527 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
528 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
529
530 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
531
532 if(lpar_rc != H_SUCCESS) {
533 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
534 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
535 adapter->buffer_list_dma,
536 adapter->filter_list_dma,
537 rxq_desc.desc,
538 mac_address);
539 ibmveth_cleanup(adapter);
540 return -ENONET;
541 }
542
543 for(i = 0; i<IbmVethNumBufferPools; i++) {
544 if(!adapter->rx_buff_pool[i].active)
545 continue;
546 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
547 ibmveth_error_printk("unable to alloc pool\n");
548 adapter->rx_buff_pool[i].active = 0;
549 ibmveth_cleanup(adapter);
550 return -ENOMEM ;
551 }
552 }
553
554 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
555 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
556 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
557 do {
558 rc = h_free_logical_lan(adapter->vdev->unit_address);
559 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
560
561 ibmveth_cleanup(adapter);
562 return rc;
563 }
564
565 ibmveth_debug_printk("initial replenish cycle\n");
566 ibmveth_interrupt(netdev->irq, netdev, NULL);
567
568 netif_start_queue(netdev);
569
570 ibmveth_debug_printk("open complete\n");
571
572 return 0;
573 }
574
575 static int ibmveth_close(struct net_device *netdev)
576 {
577 struct ibmveth_adapter *adapter = netdev->priv;
578 long lpar_rc;
579
580 ibmveth_debug_printk("close starting\n");
581
582 if (!adapter->pool_config)
583 netif_stop_queue(netdev);
584
585 free_irq(netdev->irq, netdev);
586
587 do {
588 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
589 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
590
591 if(lpar_rc != H_SUCCESS)
592 {
593 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
594 lpar_rc);
595 }
596
597 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
598
599 ibmveth_cleanup(adapter);
600
601 ibmveth_debug_printk("close complete\n");
602
603 return 0;
604 }
605
606 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
607 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
608 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
609 cmd->speed = SPEED_1000;
610 cmd->duplex = DUPLEX_FULL;
611 cmd->port = PORT_FIBRE;
612 cmd->phy_address = 0;
613 cmd->transceiver = XCVR_INTERNAL;
614 cmd->autoneg = AUTONEG_ENABLE;
615 cmd->maxtxpkt = 0;
616 cmd->maxrxpkt = 1;
617 return 0;
618 }
619
620 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
621 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
622 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
623 }
624
625 static u32 netdev_get_link(struct net_device *dev) {
626 return 1;
627 }
628
629 static const struct ethtool_ops netdev_ethtool_ops = {
630 .get_drvinfo = netdev_get_drvinfo,
631 .get_settings = netdev_get_settings,
632 .get_link = netdev_get_link,
633 .get_sg = ethtool_op_get_sg,
634 .get_tx_csum = ethtool_op_get_tx_csum,
635 };
636
637 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
638 {
639 return -EOPNOTSUPP;
640 }
641
642 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
643
644 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
645 {
646 struct ibmveth_adapter *adapter = netdev->priv;
647 union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
648 unsigned long lpar_rc;
649 int nfrags = 0, curfrag;
650 unsigned long correlator;
651 unsigned long flags;
652 unsigned int retry_count;
653 unsigned int tx_dropped = 0;
654 unsigned int tx_bytes = 0;
655 unsigned int tx_packets = 0;
656 unsigned int tx_send_failed = 0;
657 unsigned int tx_map_failed = 0;
658
659
660 if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
661 tx_dropped++;
662 goto out;
663 }
664
665 memset(&desc, 0, sizeof(desc));
666
667 /* nfrags = number of frags after the initial fragment */
668 nfrags = skb_shinfo(skb)->nr_frags;
669
670 if(nfrags)
671 adapter->tx_multidesc_send++;
672
673 /* map the initial fragment */
674 desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
675 desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
676 desc[0].fields.length, DMA_TO_DEVICE);
677 desc[0].fields.valid = 1;
678
679 if(dma_mapping_error(desc[0].fields.address)) {
680 ibmveth_error_printk("tx: unable to map initial fragment\n");
681 tx_map_failed++;
682 tx_dropped++;
683 goto out;
684 }
685
686 curfrag = nfrags;
687
688 /* map fragments past the initial portion if there are any */
689 while(curfrag--) {
690 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
691 desc[curfrag+1].fields.address
692 = dma_map_single(&adapter->vdev->dev,
693 page_address(frag->page) + frag->page_offset,
694 frag->size, DMA_TO_DEVICE);
695 desc[curfrag+1].fields.length = frag->size;
696 desc[curfrag+1].fields.valid = 1;
697
698 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
699 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
700 tx_map_failed++;
701 tx_dropped++;
702 /* Free all the mappings we just created */
703 while(curfrag < nfrags) {
704 dma_unmap_single(&adapter->vdev->dev,
705 desc[curfrag+1].fields.address,
706 desc[curfrag+1].fields.length,
707 DMA_TO_DEVICE);
708 curfrag++;
709 }
710 goto out;
711 }
712 }
713
714 /* send the frame. Arbitrarily set retrycount to 1024 */
715 correlator = 0;
716 retry_count = 1024;
717 do {
718 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
719 desc[0].desc,
720 desc[1].desc,
721 desc[2].desc,
722 desc[3].desc,
723 desc[4].desc,
724 desc[5].desc,
725 correlator,
726 &correlator);
727 } while ((lpar_rc == H_BUSY) && (retry_count--));
728
729 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
730 int i;
731 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
732 for(i = 0; i < 6; i++) {
733 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
734 desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
735 }
736 tx_send_failed++;
737 tx_dropped++;
738 } else {
739 tx_packets++;
740 tx_bytes += skb->len;
741 netdev->trans_start = jiffies;
742 }
743
744 do {
745 dma_unmap_single(&adapter->vdev->dev,
746 desc[nfrags].fields.address,
747 desc[nfrags].fields.length, DMA_TO_DEVICE);
748 } while(--nfrags >= 0);
749
750 out: spin_lock_irqsave(&adapter->stats_lock, flags);
751 adapter->stats.tx_dropped += tx_dropped;
752 adapter->stats.tx_bytes += tx_bytes;
753 adapter->stats.tx_packets += tx_packets;
754 adapter->tx_send_failed += tx_send_failed;
755 adapter->tx_map_failed += tx_map_failed;
756 spin_unlock_irqrestore(&adapter->stats_lock, flags);
757
758 dev_kfree_skb(skb);
759 return 0;
760 }
761
762 static int ibmveth_poll(struct net_device *netdev, int *budget)
763 {
764 struct ibmveth_adapter *adapter = netdev->priv;
765 int max_frames_to_process = netdev->quota;
766 int frames_processed = 0;
767 int more_work = 1;
768 unsigned long lpar_rc;
769
770 restart_poll:
771 do {
772 struct net_device *netdev = adapter->netdev;
773
774 if(ibmveth_rxq_pending_buffer(adapter)) {
775 struct sk_buff *skb;
776
777 rmb();
778
779 if(!ibmveth_rxq_buffer_valid(adapter)) {
780 wmb(); /* suggested by larson1 */
781 adapter->rx_invalid_buffer++;
782 ibmveth_debug_printk("recycling invalid buffer\n");
783 ibmveth_rxq_recycle_buffer(adapter);
784 } else {
785 int length = ibmveth_rxq_frame_length(adapter);
786 int offset = ibmveth_rxq_frame_offset(adapter);
787 skb = ibmveth_rxq_get_buffer(adapter);
788
789 ibmveth_rxq_harvest_buffer(adapter);
790
791 skb_reserve(skb, offset);
792 skb_put(skb, length);
793 skb->dev = netdev;
794 skb->protocol = eth_type_trans(skb, netdev);
795
796 netif_receive_skb(skb); /* send it up */
797
798 adapter->stats.rx_packets++;
799 adapter->stats.rx_bytes += length;
800 frames_processed++;
801 netdev->last_rx = jiffies;
802 }
803 } else {
804 more_work = 0;
805 }
806 } while(more_work && (frames_processed < max_frames_to_process));
807
808 ibmveth_replenish_task(adapter);
809
810 if(more_work) {
811 /* more work to do - return that we are not done yet */
812 netdev->quota -= frames_processed;
813 *budget -= frames_processed;
814 return 1;
815 }
816
817 /* we think we are done - reenable interrupts, then check once more to make sure we are done */
818 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
819
820 ibmveth_assert(lpar_rc == H_SUCCESS);
821
822 netif_rx_complete(netdev);
823
824 if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
825 {
826 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
827 ibmveth_assert(lpar_rc == H_SUCCESS);
828 more_work = 1;
829 goto restart_poll;
830 }
831
832 netdev->quota -= frames_processed;
833 *budget -= frames_processed;
834
835 /* we really are done */
836 return 0;
837 }
838
839 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
840 {
841 struct net_device *netdev = dev_instance;
842 struct ibmveth_adapter *adapter = netdev->priv;
843 unsigned long lpar_rc;
844
845 if(netif_rx_schedule_prep(netdev)) {
846 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
847 ibmveth_assert(lpar_rc == H_SUCCESS);
848 __netif_rx_schedule(netdev);
849 }
850 return IRQ_HANDLED;
851 }
852
853 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
854 {
855 struct ibmveth_adapter *adapter = dev->priv;
856 return &adapter->stats;
857 }
858
859 static void ibmveth_set_multicast_list(struct net_device *netdev)
860 {
861 struct ibmveth_adapter *adapter = netdev->priv;
862 unsigned long lpar_rc;
863
864 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
865 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
866 IbmVethMcastEnableRecv |
867 IbmVethMcastDisableFiltering,
868 0);
869 if(lpar_rc != H_SUCCESS) {
870 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
871 }
872 } else {
873 struct dev_mc_list *mclist = netdev->mc_list;
874 int i;
875 /* clear the filter table & disable filtering */
876 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
877 IbmVethMcastEnableRecv |
878 IbmVethMcastDisableFiltering |
879 IbmVethMcastClearFilterTable,
880 0);
881 if(lpar_rc != H_SUCCESS) {
882 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
883 }
884 /* add the addresses to the filter table */
885 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
886 // add the multicast address to the filter table
887 unsigned long mcast_addr = 0;
888 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
889 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
890 IbmVethMcastAddFilter,
891 mcast_addr);
892 if(lpar_rc != H_SUCCESS) {
893 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
894 }
895 }
896
897 /* re-enable filtering */
898 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
899 IbmVethMcastEnableFiltering,
900 0);
901 if(lpar_rc != H_SUCCESS) {
902 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
903 }
904 }
905 }
906
907 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
908 {
909 struct ibmveth_adapter *adapter = dev->priv;
910 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
911 int i;
912
913 if (new_mtu < IBMVETH_MAX_MTU)
914 return -EINVAL;
915
916 /* Look for an active buffer pool that can hold the new MTU */
917 for(i = 0; i<IbmVethNumBufferPools; i++) {
918 if (!adapter->rx_buff_pool[i].active)
919 continue;
920 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
921 dev->mtu = new_mtu;
922 return 0;
923 }
924 }
925 return -EINVAL;
926 }
927
928 #ifdef CONFIG_NET_POLL_CONTROLLER
929 static void ibmveth_poll_controller(struct net_device *dev)
930 {
931 ibmveth_replenish_task(dev->priv);
932 ibmveth_interrupt(dev->irq, dev, NULL);
933 }
934 #endif
935
936 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
937 {
938 int rc, i;
939 struct net_device *netdev;
940 struct ibmveth_adapter *adapter = NULL;
941
942 unsigned char *mac_addr_p;
943 unsigned int *mcastFilterSize_p;
944
945
946 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
947 dev->unit_address);
948
949 mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
950 if(!mac_addr_p) {
951 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
952 "attribute\n", __FILE__, __LINE__);
953 return 0;
954 }
955
956 mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
957 if(!mcastFilterSize_p) {
958 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
959 "VETH_MCAST_FILTER_SIZE attribute\n",
960 __FILE__, __LINE__);
961 return 0;
962 }
963
964 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
965
966 if(!netdev)
967 return -ENOMEM;
968
969 SET_MODULE_OWNER(netdev);
970
971 adapter = netdev->priv;
972 memset(adapter, 0, sizeof(adapter));
973 dev->dev.driver_data = netdev;
974
975 adapter->vdev = dev;
976 adapter->netdev = netdev;
977 adapter->mcastFilterSize= *mcastFilterSize_p;
978 adapter->pool_config = 0;
979
980 /* Some older boxes running PHYP non-natively have an OF that
981 returns a 8-byte local-mac-address field (and the first
982 2 bytes have to be ignored) while newer boxes' OF return
983 a 6-byte field. Note that IEEE 1275 specifies that
984 local-mac-address must be a 6-byte field.
985 The RPA doc specifies that the first byte must be 10b, so
986 we'll just look for it to solve this 8 vs. 6 byte field issue */
987
988 if ((*mac_addr_p & 0x3) != 0x02)
989 mac_addr_p += 2;
990
991 adapter->mac_addr = 0;
992 memcpy(&adapter->mac_addr, mac_addr_p, 6);
993
994 adapter->liobn = dev->iommu_table->it_index;
995
996 netdev->irq = dev->irq;
997 netdev->open = ibmveth_open;
998 netdev->poll = ibmveth_poll;
999 netdev->weight = 16;
1000 netdev->stop = ibmveth_close;
1001 netdev->hard_start_xmit = ibmveth_start_xmit;
1002 netdev->get_stats = ibmveth_get_stats;
1003 netdev->set_multicast_list = ibmveth_set_multicast_list;
1004 netdev->do_ioctl = ibmveth_ioctl;
1005 netdev->ethtool_ops = &netdev_ethtool_ops;
1006 netdev->change_mtu = ibmveth_change_mtu;
1007 SET_NETDEV_DEV(netdev, &dev->dev);
1008 #ifdef CONFIG_NET_POLL_CONTROLLER
1009 netdev->poll_controller = ibmveth_poll_controller;
1010 #endif
1011 netdev->features |= NETIF_F_LLTX;
1012 spin_lock_init(&adapter->stats_lock);
1013
1014 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1015
1016 for(i = 0; i<IbmVethNumBufferPools; i++) {
1017 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1018 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1019 pool_count[i], pool_size[i],
1020 pool_active[i]);
1021 kobj->parent = &dev->dev.kobj;
1022 sprintf(kobj->name, "pool%d", i);
1023 kobj->ktype = &ktype_veth_pool;
1024 kobject_register(kobj);
1025 }
1026
1027 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1028
1029 adapter->buffer_list_dma = DMA_ERROR_CODE;
1030 adapter->filter_list_dma = DMA_ERROR_CODE;
1031 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1032
1033 ibmveth_debug_printk("registering netdev...\n");
1034
1035 rc = register_netdev(netdev);
1036
1037 if(rc) {
1038 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1039 free_netdev(netdev);
1040 return rc;
1041 }
1042
1043 ibmveth_debug_printk("registered\n");
1044
1045 ibmveth_proc_register_adapter(adapter);
1046
1047 return 0;
1048 }
1049
1050 static int __devexit ibmveth_remove(struct vio_dev *dev)
1051 {
1052 struct net_device *netdev = dev->dev.driver_data;
1053 struct ibmveth_adapter *adapter = netdev->priv;
1054 int i;
1055
1056 for(i = 0; i<IbmVethNumBufferPools; i++)
1057 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1058
1059 unregister_netdev(netdev);
1060
1061 ibmveth_proc_unregister_adapter(adapter);
1062
1063 free_netdev(netdev);
1064 return 0;
1065 }
1066
1067 #ifdef CONFIG_PROC_FS
1068 static void ibmveth_proc_register_driver(void)
1069 {
1070 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1071 if (ibmveth_proc_dir) {
1072 SET_MODULE_OWNER(ibmveth_proc_dir);
1073 }
1074 }
1075
1076 static void ibmveth_proc_unregister_driver(void)
1077 {
1078 remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1079 }
1080
1081 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1082 {
1083 if (*pos == 0) {
1084 return (void *)1;
1085 } else {
1086 return NULL;
1087 }
1088 }
1089
1090 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1091 {
1092 ++*pos;
1093 return NULL;
1094 }
1095
1096 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1097 {
1098 }
1099
1100 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1101 {
1102 struct ibmveth_adapter *adapter = seq->private;
1103 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1104 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1105
1106 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1107
1108 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1109 seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn);
1110 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1111 current_mac[0], current_mac[1], current_mac[2],
1112 current_mac[3], current_mac[4], current_mac[5]);
1113 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1114 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1115 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1116
1117 seq_printf(seq, "\nAdapter Statistics:\n");
1118 seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
1119 seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
1120 seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
1121 seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
1122 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1123 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1124 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1125 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1126 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1127 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1128
1129 return 0;
1130 }
1131 static struct seq_operations ibmveth_seq_ops = {
1132 .start = ibmveth_seq_start,
1133 .next = ibmveth_seq_next,
1134 .stop = ibmveth_seq_stop,
1135 .show = ibmveth_seq_show,
1136 };
1137
1138 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1139 {
1140 struct seq_file *seq;
1141 struct proc_dir_entry *proc;
1142 int rc;
1143
1144 rc = seq_open(file, &ibmveth_seq_ops);
1145 if (!rc) {
1146 /* recover the pointer buried in proc_dir_entry data */
1147 seq = file->private_data;
1148 proc = PDE(inode);
1149 seq->private = proc->data;
1150 }
1151 return rc;
1152 }
1153
1154 static struct file_operations ibmveth_proc_fops = {
1155 .owner = THIS_MODULE,
1156 .open = ibmveth_proc_open,
1157 .read = seq_read,
1158 .llseek = seq_lseek,
1159 .release = seq_release,
1160 };
1161
1162 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1163 {
1164 struct proc_dir_entry *entry;
1165 if (ibmveth_proc_dir) {
1166 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1167 if (!entry) {
1168 ibmveth_error_printk("Cannot create adapter proc entry");
1169 } else {
1170 entry->data = (void *) adapter;
1171 entry->proc_fops = &ibmveth_proc_fops;
1172 SET_MODULE_OWNER(entry);
1173 }
1174 }
1175 return;
1176 }
1177
1178 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1179 {
1180 if (ibmveth_proc_dir) {
1181 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1182 }
1183 }
1184
1185 #else /* CONFIG_PROC_FS */
1186 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1187 {
1188 }
1189
1190 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1191 {
1192 }
1193 static void ibmveth_proc_register_driver(void)
1194 {
1195 }
1196
1197 static void ibmveth_proc_unregister_driver(void)
1198 {
1199 }
1200 #endif /* CONFIG_PROC_FS */
1201
1202 static struct attribute veth_active_attr;
1203 static struct attribute veth_num_attr;
1204 static struct attribute veth_size_attr;
1205
1206 static ssize_t veth_pool_show(struct kobject * kobj,
1207 struct attribute * attr, char * buf)
1208 {
1209 struct ibmveth_buff_pool *pool = container_of(kobj,
1210 struct ibmveth_buff_pool,
1211 kobj);
1212
1213 if (attr == &veth_active_attr)
1214 return sprintf(buf, "%d\n", pool->active);
1215 else if (attr == &veth_num_attr)
1216 return sprintf(buf, "%d\n", pool->size);
1217 else if (attr == &veth_size_attr)
1218 return sprintf(buf, "%d\n", pool->buff_size);
1219 return 0;
1220 }
1221
1222 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1223 const char * buf, size_t count)
1224 {
1225 struct ibmveth_buff_pool *pool = container_of(kobj,
1226 struct ibmveth_buff_pool,
1227 kobj);
1228 struct net_device *netdev =
1229 container_of(kobj->parent, struct device, kobj)->driver_data;
1230 struct ibmveth_adapter *adapter = netdev->priv;
1231 long value = simple_strtol(buf, NULL, 10);
1232 long rc;
1233
1234 if (attr == &veth_active_attr) {
1235 if (value && !pool->active) {
1236 if(ibmveth_alloc_buffer_pool(pool)) {
1237 ibmveth_error_printk("unable to alloc pool\n");
1238 return -ENOMEM;
1239 }
1240 pool->active = 1;
1241 adapter->pool_config = 1;
1242 ibmveth_close(netdev);
1243 adapter->pool_config = 0;
1244 if ((rc = ibmveth_open(netdev)))
1245 return rc;
1246 } else if (!value && pool->active) {
1247 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1248 int i;
1249 /* Make sure there is a buffer pool with buffers that
1250 can hold a packet of the size of the MTU */
1251 for(i = 0; i<IbmVethNumBufferPools; i++) {
1252 if (pool == &adapter->rx_buff_pool[i])
1253 continue;
1254 if (!adapter->rx_buff_pool[i].active)
1255 continue;
1256 if (mtu < adapter->rx_buff_pool[i].buff_size) {
1257 pool->active = 0;
1258 h_free_logical_lan_buffer(adapter->
1259 vdev->
1260 unit_address,
1261 pool->
1262 buff_size);
1263 }
1264 }
1265 if (pool->active) {
1266 ibmveth_error_printk("no active pool >= MTU\n");
1267 return -EPERM;
1268 }
1269 }
1270 } else if (attr == &veth_num_attr) {
1271 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1272 return -EINVAL;
1273 else {
1274 adapter->pool_config = 1;
1275 ibmveth_close(netdev);
1276 adapter->pool_config = 0;
1277 pool->size = value;
1278 if ((rc = ibmveth_open(netdev)))
1279 return rc;
1280 }
1281 } else if (attr == &veth_size_attr) {
1282 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1283 return -EINVAL;
1284 else {
1285 adapter->pool_config = 1;
1286 ibmveth_close(netdev);
1287 adapter->pool_config = 0;
1288 pool->buff_size = value;
1289 if ((rc = ibmveth_open(netdev)))
1290 return rc;
1291 }
1292 }
1293
1294 /* kick the interrupt handler to allocate/deallocate pools */
1295 ibmveth_interrupt(netdev->irq, netdev, NULL);
1296 return count;
1297 }
1298
1299
1300 #define ATTR(_name, _mode) \
1301 struct attribute veth_##_name##_attr = { \
1302 .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
1303 };
1304
1305 static ATTR(active, 0644);
1306 static ATTR(num, 0644);
1307 static ATTR(size, 0644);
1308
1309 static struct attribute * veth_pool_attrs[] = {
1310 &veth_active_attr,
1311 &veth_num_attr,
1312 &veth_size_attr,
1313 NULL,
1314 };
1315
1316 static struct sysfs_ops veth_pool_ops = {
1317 .show = veth_pool_show,
1318 .store = veth_pool_store,
1319 };
1320
1321 static struct kobj_type ktype_veth_pool = {
1322 .release = NULL,
1323 .sysfs_ops = &veth_pool_ops,
1324 .default_attrs = veth_pool_attrs,
1325 };
1326
1327
1328 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1329 { "network", "IBM,l-lan"},
1330 { "", "" }
1331 };
1332 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1333
1334 static struct vio_driver ibmveth_driver = {
1335 .id_table = ibmveth_device_table,
1336 .probe = ibmveth_probe,
1337 .remove = ibmveth_remove,
1338 .driver = {
1339 .name = ibmveth_driver_name,
1340 .owner = THIS_MODULE,
1341 }
1342 };
1343
1344 static int __init ibmveth_module_init(void)
1345 {
1346 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1347
1348 ibmveth_proc_register_driver();
1349
1350 return vio_register_driver(&ibmveth_driver);
1351 }
1352
1353 static void __exit ibmveth_module_exit(void)
1354 {
1355 vio_unregister_driver(&ibmveth_driver);
1356 ibmveth_proc_unregister_driver();
1357 }
1358
1359 module_init(ibmveth_module_init);
1360 module_exit(ibmveth_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree