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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / net / ibmveth.c
blob7d7758f3ad8c1afb4d4b767d1e25061728f4fade
1 /**************************************************************************/
2 /* */
3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver */
4 /* Copyright (C) 2003 IBM Corp. */
5 /* Originally written by Dave Larson (larson1@us.ibm.com) */
6 /* Maintained by Santiago Leon (santil@us.ibm.com) */
7 /* */
8 /* This program is free software; you can redistribute it and/or modify */
9 /* it under the terms of the GNU General Public License as published by */
10 /* the Free Software Foundation; either version 2 of the License, or */
11 /* (at your option) any later version. */
12 /* */
13 /* This program is distributed in the hope that it will be useful, */
14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
16 /* GNU General Public License for more details. */
17 /* */
18 /* You should have received a copy of the GNU General Public License */
19 /* along with this program; if not, write to the Free Software */
20 /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
21 /* USA */
22 /* */
23 /* This module contains the implementation of a virtual ethernet device */
24 /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */
25 /* option of the RS/6000 Platform Architechture to interface with virtual */
26 /* ethernet NICs that are presented to the partition by the hypervisor. */
27 /* */
28 /**************************************************************************/
29 /*
30 TODO:
31 - add support for sysfs
32 - possibly remove procfs support
33 */
34
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <linux/errno.h>
38 #include <linux/ioport.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/kernel.h>
41 #include <linux/netdevice.h>
42 #include <linux/etherdevice.h>
43 #include <linux/skbuff.h>
44 #include <linux/init.h>
45 #include <linux/delay.h>
46 #include <linux/mm.h>
47 #include <linux/ethtool.h>
48 #include <linux/proc_fs.h>
49 #include <linux/in.h>
50 #include <linux/ip.h>
51 #include <net/net_namespace.h>
52 #include <asm/semaphore.h>
53 #include <asm/hvcall.h>
54 #include <asm/atomic.h>
55 #include <asm/vio.h>
56 #include <asm/uaccess.h>
57 #include <linux/seq_file.h>
58
59 #include "ibmveth.h"
60
61 #undef DEBUG
62
63 #define ibmveth_printk(fmt, args...) \
64 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
65
66 #define ibmveth_error_printk(fmt, args...) \
67 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
68
69 #ifdef DEBUG
70 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
71 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
72 #define ibmveth_debug_printk(fmt, args...) \
73 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
74 #define ibmveth_assert(expr) \
75 if(!(expr)) { \
76 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
77 BUG(); \
78 }
79 #else
80 #define ibmveth_debug_printk_no_adapter(fmt, args...)
81 #define ibmveth_debug_printk(fmt, args...)
82 #define ibmveth_assert(expr)
83 #endif
84
85 static int ibmveth_open(struct net_device *dev);
86 static int ibmveth_close(struct net_device *dev);
87 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
88 static int ibmveth_poll(struct napi_struct *napi, int budget);
89 static int ibmveth_start_xmit(struct sk_buff *skb, 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 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 "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 struct ibmveth_stat {
115 char name[ETH_GSTRING_LEN];
116 int offset;
117 };
118
119 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
120 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
121
122 struct ibmveth_stat ibmveth_stats[] = {
123 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
124 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
125 { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
126 { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
127 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
128 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
129 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
130 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
131 };
132
133 /* simple methods of getting data from the current rxq entry */
134 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
135 {
136 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
137 }
138
139 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
140 {
141 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
142 }
143
144 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
145 {
146 return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
147 }
148
149 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
150 {
151 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
152 }
153
154 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
155 {
156 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
157 }
158
159 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
160 {
161 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
162 }
163
164 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
165 {
166 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
167 }
168
169 /* setup the initial settings for a buffer pool */
170 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
171 {
172 pool->size = pool_size;
173 pool->index = pool_index;
174 pool->buff_size = buff_size;
175 pool->threshold = pool_size / 2;
176 pool->active = pool_active;
177 }
178
179 /* allocate and setup an buffer pool - called during open */
180 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
181 {
182 int i;
183
184 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
185
186 if(!pool->free_map) {
187 return -1;
188 }
189
190 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
191 if(!pool->dma_addr) {
192 kfree(pool->free_map);
193 pool->free_map = NULL;
194 return -1;
195 }
196
197 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
198
199 if(!pool->skbuff) {
200 kfree(pool->dma_addr);
201 pool->dma_addr = NULL;
202
203 kfree(pool->free_map);
204 pool->free_map = NULL;
205 return -1;
206 }
207
208 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
209 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
210
211 for(i = 0; i < pool->size; ++i) {
212 pool->free_map[i] = i;
213 }
214
215 atomic_set(&pool->available, 0);
216 pool->producer_index = 0;
217 pool->consumer_index = 0;
218
219 return 0;
220 }
221
222 /* replenish the buffers for a pool. note that we don't need to
223 * skb_reserve these since they are used for incoming...
224 */
225 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
226 {
227 u32 i;
228 u32 count = pool->size - atomic_read(&pool->available);
229 u32 buffers_added = 0;
230
231 mb();
232
233 for(i = 0; i < count; ++i) {
234 struct sk_buff *skb;
235 unsigned int free_index, index;
236 u64 correlator;
237 union ibmveth_buf_desc desc;
238 unsigned long lpar_rc;
239 dma_addr_t dma_addr;
240
241 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
242
243 if(!skb) {
244 ibmveth_debug_printk("replenish: unable to allocate skb\n");
245 adapter->replenish_no_mem++;
246 break;
247 }
248
249 free_index = pool->consumer_index;
250 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
251 index = pool->free_map[free_index];
252
253 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
254 ibmveth_assert(pool->skbuff[index] == NULL);
255
256 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
257 pool->buff_size, DMA_FROM_DEVICE);
258
259 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
260 pool->dma_addr[index] = dma_addr;
261 pool->skbuff[index] = skb;
262
263 correlator = ((u64)pool->index << 32) | index;
264 *(u64*)skb->data = correlator;
265
266 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
267 desc.fields.address = dma_addr;
268
269 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
270
271 if(lpar_rc != H_SUCCESS) {
272 pool->free_map[free_index] = index;
273 pool->skbuff[index] = NULL;
274 if (pool->consumer_index == 0)
275 pool->consumer_index = pool->size - 1;
276 else
277 pool->consumer_index--;
278 dma_unmap_single(&adapter->vdev->dev,
279 pool->dma_addr[index], pool->buff_size,
280 DMA_FROM_DEVICE);
281 dev_kfree_skb_any(skb);
282 adapter->replenish_add_buff_failure++;
283 break;
284 } else {
285 buffers_added++;
286 adapter->replenish_add_buff_success++;
287 }
288 }
289
290 mb();
291 atomic_add(buffers_added, &(pool->available));
292 }
293
294 /* replenish routine */
295 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
296 {
297 int i;
298
299 adapter->replenish_task_cycles++;
300
301 for(i = 0; i < IbmVethNumBufferPools; i++)
302 if(adapter->rx_buff_pool[i].active)
303 ibmveth_replenish_buffer_pool(adapter,
304 &adapter->rx_buff_pool[i]);
305
306 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
307 }
308
309 /* empty and free ana buffer pool - also used to do cleanup in error paths */
310 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
311 {
312 int i;
313
314 kfree(pool->free_map);
315 pool->free_map = NULL;
316
317 if(pool->skbuff && pool->dma_addr) {
318 for(i = 0; i < pool->size; ++i) {
319 struct sk_buff *skb = pool->skbuff[i];
320 if(skb) {
321 dma_unmap_single(&adapter->vdev->dev,
322 pool->dma_addr[i],
323 pool->buff_size,
324 DMA_FROM_DEVICE);
325 dev_kfree_skb_any(skb);
326 pool->skbuff[i] = NULL;
327 }
328 }
329 }
330
331 if(pool->dma_addr) {
332 kfree(pool->dma_addr);
333 pool->dma_addr = NULL;
334 }
335
336 if(pool->skbuff) {
337 kfree(pool->skbuff);
338 pool->skbuff = NULL;
339 }
340 }
341
342 /* remove a buffer from a pool */
343 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
344 {
345 unsigned int pool = correlator >> 32;
346 unsigned int index = correlator & 0xffffffffUL;
347 unsigned int free_index;
348 struct sk_buff *skb;
349
350 ibmveth_assert(pool < IbmVethNumBufferPools);
351 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
352
353 skb = adapter->rx_buff_pool[pool].skbuff[index];
354
355 ibmveth_assert(skb != NULL);
356
357 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
358
359 dma_unmap_single(&adapter->vdev->dev,
360 adapter->rx_buff_pool[pool].dma_addr[index],
361 adapter->rx_buff_pool[pool].buff_size,
362 DMA_FROM_DEVICE);
363
364 free_index = adapter->rx_buff_pool[pool].producer_index;
365 adapter->rx_buff_pool[pool].producer_index
366 = (adapter->rx_buff_pool[pool].producer_index + 1)
367 % adapter->rx_buff_pool[pool].size;
368 adapter->rx_buff_pool[pool].free_map[free_index] = index;
369
370 mb();
371
372 atomic_dec(&(adapter->rx_buff_pool[pool].available));
373 }
374
375 /* get the current buffer on the rx queue */
376 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
377 {
378 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
379 unsigned int pool = correlator >> 32;
380 unsigned int index = correlator & 0xffffffffUL;
381
382 ibmveth_assert(pool < IbmVethNumBufferPools);
383 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
384
385 return adapter->rx_buff_pool[pool].skbuff[index];
386 }
387
388 /* recycle the current buffer on the rx queue */
389 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
390 {
391 u32 q_index = adapter->rx_queue.index;
392 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
393 unsigned int pool = correlator >> 32;
394 unsigned int index = correlator & 0xffffffffUL;
395 union ibmveth_buf_desc desc;
396 unsigned long lpar_rc;
397
398 ibmveth_assert(pool < IbmVethNumBufferPools);
399 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
400
401 if(!adapter->rx_buff_pool[pool].active) {
402 ibmveth_rxq_harvest_buffer(adapter);
403 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
404 return;
405 }
406
407 desc.fields.flags_len = IBMVETH_BUF_VALID |
408 adapter->rx_buff_pool[pool].buff_size;
409 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
410
411 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
412
413 if(lpar_rc != H_SUCCESS) {
414 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
415 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
416 }
417
418 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
419 adapter->rx_queue.index = 0;
420 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
421 }
422 }
423
424 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
425 {
426 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
427
428 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
429 adapter->rx_queue.index = 0;
430 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
431 }
432 }
433
434 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
435 {
436 int i;
437
438 if(adapter->buffer_list_addr != NULL) {
439 if(!dma_mapping_error(adapter->buffer_list_dma)) {
440 dma_unmap_single(&adapter->vdev->dev,
441 adapter->buffer_list_dma, 4096,
442 DMA_BIDIRECTIONAL);
443 adapter->buffer_list_dma = DMA_ERROR_CODE;
444 }
445 free_page((unsigned long)adapter->buffer_list_addr);
446 adapter->buffer_list_addr = NULL;
447 }
448
449 if(adapter->filter_list_addr != NULL) {
450 if(!dma_mapping_error(adapter->filter_list_dma)) {
451 dma_unmap_single(&adapter->vdev->dev,
452 adapter->filter_list_dma, 4096,
453 DMA_BIDIRECTIONAL);
454 adapter->filter_list_dma = DMA_ERROR_CODE;
455 }
456 free_page((unsigned long)adapter->filter_list_addr);
457 adapter->filter_list_addr = NULL;
458 }
459
460 if(adapter->rx_queue.queue_addr != NULL) {
461 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
462 dma_unmap_single(&adapter->vdev->dev,
463 adapter->rx_queue.queue_dma,
464 adapter->rx_queue.queue_len,
465 DMA_BIDIRECTIONAL);
466 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
467 }
468 kfree(adapter->rx_queue.queue_addr);
469 adapter->rx_queue.queue_addr = NULL;
470 }
471
472 for(i = 0; i<IbmVethNumBufferPools; i++)
473 if (adapter->rx_buff_pool[i].active)
474 ibmveth_free_buffer_pool(adapter,
475 &adapter->rx_buff_pool[i]);
476 }
477
478 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
479 union ibmveth_buf_desc rxq_desc, u64 mac_address)
480 {
481 int rc, try_again = 1;
482
483 /* After a kexec the adapter will still be open, so our attempt to
484 * open it will fail. So if we get a failure we free the adapter and
485 * try again, but only once. */
486 retry:
487 rc = h_register_logical_lan(adapter->vdev->unit_address,
488 adapter->buffer_list_dma, rxq_desc.desc,
489 adapter->filter_list_dma, mac_address);
490
491 if (rc != H_SUCCESS && try_again) {
492 do {
493 rc = h_free_logical_lan(adapter->vdev->unit_address);
494 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
495
496 try_again = 0;
497 goto retry;
498 }
499
500 return rc;
501 }
502
503 static int ibmveth_open(struct net_device *netdev)
504 {
505 struct ibmveth_adapter *adapter = netdev->priv;
506 u64 mac_address = 0;
507 int rxq_entries = 1;
508 unsigned long lpar_rc;
509 int rc;
510 union ibmveth_buf_desc rxq_desc;
511 int i;
512
513 ibmveth_debug_printk("open starting\n");
514
515 napi_enable(&adapter->napi);
516
517 for(i = 0; i<IbmVethNumBufferPools; i++)
518 rxq_entries += adapter->rx_buff_pool[i].size;
519
520 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
521 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
522
523 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
524 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
525 ibmveth_cleanup(adapter);
526 napi_disable(&adapter->napi);
527 return -ENOMEM;
528 }
529
530 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
531 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
532
533 if(!adapter->rx_queue.queue_addr) {
534 ibmveth_error_printk("unable to allocate rx queue pages\n");
535 ibmveth_cleanup(adapter);
536 napi_disable(&adapter->napi);
537 return -ENOMEM;
538 }
539
540 adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
541 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
542 adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
543 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
544 adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
545 adapter->rx_queue.queue_addr,
546 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
547
548 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
549 (dma_mapping_error(adapter->filter_list_dma)) ||
550 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
551 ibmveth_error_printk("unable to map filter or buffer list pages\n");
552 ibmveth_cleanup(adapter);
553 napi_disable(&adapter->napi);
554 return -ENOMEM;
555 }
556
557 adapter->rx_queue.index = 0;
558 adapter->rx_queue.num_slots = rxq_entries;
559 adapter->rx_queue.toggle = 1;
560
561 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
562 mac_address = mac_address >> 16;
563
564 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
565 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
566
567 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
568 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
569 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
570
571 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
572
573 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
574
575 if(lpar_rc != H_SUCCESS) {
576 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
577 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
578 adapter->buffer_list_dma,
579 adapter->filter_list_dma,
580 rxq_desc.desc,
581 mac_address);
582 ibmveth_cleanup(adapter);
583 napi_disable(&adapter->napi);
584 return -ENONET;
585 }
586
587 for(i = 0; i<IbmVethNumBufferPools; i++) {
588 if(!adapter->rx_buff_pool[i].active)
589 continue;
590 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
591 ibmveth_error_printk("unable to alloc pool\n");
592 adapter->rx_buff_pool[i].active = 0;
593 ibmveth_cleanup(adapter);
594 napi_disable(&adapter->napi);
595 return -ENOMEM ;
596 }
597 }
598
599 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
600 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
601 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
602 do {
603 rc = h_free_logical_lan(adapter->vdev->unit_address);
604 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
605
606 ibmveth_cleanup(adapter);
607 napi_disable(&adapter->napi);
608 return rc;
609 }
610
611 ibmveth_debug_printk("initial replenish cycle\n");
612 ibmveth_interrupt(netdev->irq, netdev);
613
614 netif_start_queue(netdev);
615
616 ibmveth_debug_printk("open complete\n");
617
618 return 0;
619 }
620
621 static int ibmveth_close(struct net_device *netdev)
622 {
623 struct ibmveth_adapter *adapter = netdev->priv;
624 long lpar_rc;
625
626 ibmveth_debug_printk("close starting\n");
627
628 napi_disable(&adapter->napi);
629
630 if (!adapter->pool_config)
631 netif_stop_queue(netdev);
632
633 free_irq(netdev->irq, netdev);
634
635 do {
636 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
637 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
638
639 if(lpar_rc != H_SUCCESS)
640 {
641 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
642 lpar_rc);
643 }
644
645 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
646
647 ibmveth_cleanup(adapter);
648
649 ibmveth_debug_printk("close complete\n");
650
651 return 0;
652 }
653
654 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
655 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
656 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
657 cmd->speed = SPEED_1000;
658 cmd->duplex = DUPLEX_FULL;
659 cmd->port = PORT_FIBRE;
660 cmd->phy_address = 0;
661 cmd->transceiver = XCVR_INTERNAL;
662 cmd->autoneg = AUTONEG_ENABLE;
663 cmd->maxtxpkt = 0;
664 cmd->maxrxpkt = 1;
665 return 0;
666 }
667
668 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
669 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
670 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
671 }
672
673 static u32 netdev_get_link(struct net_device *dev) {
674 return 1;
675 }
676
677 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
678 {
679 struct ibmveth_adapter *adapter = dev->priv;
680
681 if (data)
682 adapter->rx_csum = 1;
683 else {
684 /*
685 * Since the ibmveth firmware interface does not have the concept of
686 * separate tx/rx checksum offload enable, if rx checksum is disabled
687 * we also have to disable tx checksum offload. Once we disable rx
688 * checksum offload, we are no longer allowed to send tx buffers that
689 * are not properly checksummed.
690 */
691 adapter->rx_csum = 0;
692 dev->features &= ~NETIF_F_IP_CSUM;
693 }
694 }
695
696 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
697 {
698 struct ibmveth_adapter *adapter = dev->priv;
699
700 if (data) {
701 dev->features |= NETIF_F_IP_CSUM;
702 adapter->rx_csum = 1;
703 } else
704 dev->features &= ~NETIF_F_IP_CSUM;
705 }
706
707 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
708 void (*done) (struct net_device *, u32))
709 {
710 struct ibmveth_adapter *adapter = dev->priv;
711 u64 set_attr, clr_attr, ret_attr;
712 long ret;
713 int rc1 = 0, rc2 = 0;
714 int restart = 0;
715
716 if (netif_running(dev)) {
717 restart = 1;
718 adapter->pool_config = 1;
719 ibmveth_close(dev);
720 adapter->pool_config = 0;
721 }
722
723 set_attr = 0;
724 clr_attr = 0;
725
726 if (data)
727 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
728 else
729 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
730
731 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
732
733 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
734 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
735 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
736 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
737 set_attr, &ret_attr);
738
739 if (ret != H_SUCCESS) {
740 rc1 = -EIO;
741 ibmveth_error_printk("unable to change checksum offload settings."
742 " %d rc=%ld\n", data, ret);
743
744 ret = h_illan_attributes(adapter->vdev->unit_address,
745 set_attr, clr_attr, &ret_attr);
746 } else
747 done(dev, data);
748 } else {
749 rc1 = -EIO;
750 ibmveth_error_printk("unable to change checksum offload settings."
751 " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
752 }
753
754 if (restart)
755 rc2 = ibmveth_open(dev);
756
757 return rc1 ? rc1 : rc2;
758 }
759
760 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
761 {
762 struct ibmveth_adapter *adapter = dev->priv;
763
764 if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
765 return 0;
766
767 return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
768 }
769
770 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
771 {
772 struct ibmveth_adapter *adapter = dev->priv;
773 int rc = 0;
774
775 if (data && (dev->features & NETIF_F_IP_CSUM))
776 return 0;
777 if (!data && !(dev->features & NETIF_F_IP_CSUM))
778 return 0;
779
780 if (data && !adapter->rx_csum)
781 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
782 else
783 ibmveth_set_tx_csum_flags(dev, data);
784
785 return rc;
786 }
787
788 static u32 ibmveth_get_rx_csum(struct net_device *dev)
789 {
790 struct ibmveth_adapter *adapter = dev->priv;
791 return adapter->rx_csum;
792 }
793
794 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
795 {
796 int i;
797
798 if (stringset != ETH_SS_STATS)
799 return;
800
801 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
802 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
803 }
804
805 static int ibmveth_get_sset_count(struct net_device *dev, int sset)
806 {
807 switch (sset) {
808 case ETH_SS_STATS:
809 return ARRAY_SIZE(ibmveth_stats);
810 default:
811 return -EOPNOTSUPP;
812 }
813 }
814
815 static void ibmveth_get_ethtool_stats(struct net_device *dev,
816 struct ethtool_stats *stats, u64 *data)
817 {
818 int i;
819 struct ibmveth_adapter *adapter = dev->priv;
820
821 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
822 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
823 }
824
825 static const struct ethtool_ops netdev_ethtool_ops = {
826 .get_drvinfo = netdev_get_drvinfo,
827 .get_settings = netdev_get_settings,
828 .get_link = netdev_get_link,
829 .set_tx_csum = ibmveth_set_tx_csum,
830 .get_rx_csum = ibmveth_get_rx_csum,
831 .set_rx_csum = ibmveth_set_rx_csum,
832 .get_strings = ibmveth_get_strings,
833 .get_sset_count = ibmveth_get_sset_count,
834 .get_ethtool_stats = ibmveth_get_ethtool_stats,
835 };
836
837 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
838 {
839 return -EOPNOTSUPP;
840 }
841
842 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
843
844 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
845 {
846 struct ibmveth_adapter *adapter = netdev->priv;
847 union ibmveth_buf_desc desc;
848 unsigned long lpar_rc;
849 unsigned long correlator;
850 unsigned long flags;
851 unsigned int retry_count;
852 unsigned int tx_dropped = 0;
853 unsigned int tx_bytes = 0;
854 unsigned int tx_packets = 0;
855 unsigned int tx_send_failed = 0;
856 unsigned int tx_map_failed = 0;
857
858 desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
859 desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
860 skb->len, DMA_TO_DEVICE);
861
862 if (skb->ip_summed == CHECKSUM_PARTIAL &&
863 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
864 ibmveth_error_printk("tx: failed to checksum packet\n");
865 tx_dropped++;
866 goto out;
867 }
868
869 if (skb->ip_summed == CHECKSUM_PARTIAL) {
870 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
871
872 desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
873
874 /* Need to zero out the checksum */
875 buf[0] = 0;
876 buf[1] = 0;
877 }
878
879 if (dma_mapping_error(desc.fields.address)) {
880 ibmveth_error_printk("tx: unable to map xmit buffer\n");
881 tx_map_failed++;
882 tx_dropped++;
883 goto out;
884 }
885
886 /* send the frame. Arbitrarily set retrycount to 1024 */
887 correlator = 0;
888 retry_count = 1024;
889 do {
890 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
891 desc.desc, 0, 0, 0, 0, 0,
892 correlator, &correlator);
893 } while ((lpar_rc == H_BUSY) && (retry_count--));
894
895 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
896 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
897 ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
898 (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
899 skb->len, desc.fields.address);
900 tx_send_failed++;
901 tx_dropped++;
902 } else {
903 tx_packets++;
904 tx_bytes += skb->len;
905 netdev->trans_start = jiffies;
906 }
907
908 dma_unmap_single(&adapter->vdev->dev, desc.fields.address,
909 skb->len, DMA_TO_DEVICE);
910
911 out: spin_lock_irqsave(&adapter->stats_lock, flags);
912 netdev->stats.tx_dropped += tx_dropped;
913 netdev->stats.tx_bytes += tx_bytes;
914 netdev->stats.tx_packets += tx_packets;
915 adapter->tx_send_failed += tx_send_failed;
916 adapter->tx_map_failed += tx_map_failed;
917 spin_unlock_irqrestore(&adapter->stats_lock, flags);
918
919 dev_kfree_skb(skb);
920 return 0;
921 }
922
923 static int ibmveth_poll(struct napi_struct *napi, int budget)
924 {
925 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
926 struct net_device *netdev = adapter->netdev;
927 int frames_processed = 0;
928 unsigned long lpar_rc;
929
930 restart_poll:
931 do {
932 struct sk_buff *skb;
933
934 if (!ibmveth_rxq_pending_buffer(adapter))
935 break;
936
937 rmb();
938 if (!ibmveth_rxq_buffer_valid(adapter)) {
939 wmb(); /* suggested by larson1 */
940 adapter->rx_invalid_buffer++;
941 ibmveth_debug_printk("recycling invalid buffer\n");
942 ibmveth_rxq_recycle_buffer(adapter);
943 } else {
944 int length = ibmveth_rxq_frame_length(adapter);
945 int offset = ibmveth_rxq_frame_offset(adapter);
946 int csum_good = ibmveth_rxq_csum_good(adapter);
947
948 skb = ibmveth_rxq_get_buffer(adapter);
949 if (csum_good)
950 skb->ip_summed = CHECKSUM_UNNECESSARY;
951
952 ibmveth_rxq_harvest_buffer(adapter);
953
954 skb_reserve(skb, offset);
955 skb_put(skb, length);
956 skb->protocol = eth_type_trans(skb, netdev);
957
958 netif_receive_skb(skb); /* send it up */
959
960 netdev->stats.rx_packets++;
961 netdev->stats.rx_bytes += length;
962 frames_processed++;
963 netdev->last_rx = jiffies;
964 }
965 } while (frames_processed < budget);
966
967 ibmveth_replenish_task(adapter);
968
969 if (frames_processed < budget) {
970 /* We think we are done - reenable interrupts,
971 * then check once more to make sure we are done.
972 */
973 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
974 VIO_IRQ_ENABLE);
975
976 ibmveth_assert(lpar_rc == H_SUCCESS);
977
978 netif_rx_complete(netdev, napi);
979
980 if (ibmveth_rxq_pending_buffer(adapter) &&
981 netif_rx_reschedule(netdev, napi)) {
982 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
983 VIO_IRQ_DISABLE);
984 goto restart_poll;
985 }
986 }
987
988 return frames_processed;
989 }
990
991 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
992 {
993 struct net_device *netdev = dev_instance;
994 struct ibmveth_adapter *adapter = netdev->priv;
995 unsigned long lpar_rc;
996
997 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
998 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
999 VIO_IRQ_DISABLE);
1000 ibmveth_assert(lpar_rc == H_SUCCESS);
1001 __netif_rx_schedule(netdev, &adapter->napi);
1002 }
1003 return IRQ_HANDLED;
1004 }
1005
1006 static void ibmveth_set_multicast_list(struct net_device *netdev)
1007 {
1008 struct ibmveth_adapter *adapter = netdev->priv;
1009 unsigned long lpar_rc;
1010
1011 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
1012 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1013 IbmVethMcastEnableRecv |
1014 IbmVethMcastDisableFiltering,
1015 0);
1016 if(lpar_rc != H_SUCCESS) {
1017 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1018 }
1019 } else {
1020 struct dev_mc_list *mclist = netdev->mc_list;
1021 int i;
1022 /* clear the filter table & disable filtering */
1023 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1024 IbmVethMcastEnableRecv |
1025 IbmVethMcastDisableFiltering |
1026 IbmVethMcastClearFilterTable,
1027 0);
1028 if(lpar_rc != H_SUCCESS) {
1029 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1030 }
1031 /* add the addresses to the filter table */
1032 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
1033 // add the multicast address to the filter table
1034 unsigned long mcast_addr = 0;
1035 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
1036 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1037 IbmVethMcastAddFilter,
1038 mcast_addr);
1039 if(lpar_rc != H_SUCCESS) {
1040 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1041 }
1042 }
1043
1044 /* re-enable filtering */
1045 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1046 IbmVethMcastEnableFiltering,
1047 0);
1048 if(lpar_rc != H_SUCCESS) {
1049 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1050 }
1051 }
1052 }
1053
1054 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1055 {
1056 struct ibmveth_adapter *adapter = dev->priv;
1057 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1058 int reinit = 0;
1059 int i, rc;
1060
1061 if (new_mtu < IBMVETH_MAX_MTU)
1062 return -EINVAL;
1063
1064 for (i = 0; i < IbmVethNumBufferPools; i++)
1065 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1066 break;
1067
1068 if (i == IbmVethNumBufferPools)
1069 return -EINVAL;
1070
1071 /* Look for an active buffer pool that can hold the new MTU */
1072 for(i = 0; i<IbmVethNumBufferPools; i++) {
1073 if (!adapter->rx_buff_pool[i].active) {
1074 adapter->rx_buff_pool[i].active = 1;
1075 reinit = 1;
1076 }
1077
1078 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1079 if (reinit && netif_running(adapter->netdev)) {
1080 adapter->pool_config = 1;
1081 ibmveth_close(adapter->netdev);
1082 adapter->pool_config = 0;
1083 dev->mtu = new_mtu;
1084 if ((rc = ibmveth_open(adapter->netdev)))
1085 return rc;
1086 } else
1087 dev->mtu = new_mtu;
1088 return 0;
1089 }
1090 }
1091 return -EINVAL;
1092 }
1093
1094 #ifdef CONFIG_NET_POLL_CONTROLLER
1095 static void ibmveth_poll_controller(struct net_device *dev)
1096 {
1097 ibmveth_replenish_task(dev->priv);
1098 ibmveth_interrupt(dev->irq, dev);
1099 }
1100 #endif
1101
1102 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1103 {
1104 int rc, i;
1105 long ret;
1106 struct net_device *netdev;
1107 struct ibmveth_adapter *adapter;
1108 u64 set_attr, ret_attr;
1109
1110 unsigned char *mac_addr_p;
1111 unsigned int *mcastFilterSize_p;
1112
1113
1114 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1115 dev->unit_address);
1116
1117 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1118 VETH_MAC_ADDR, NULL);
1119 if(!mac_addr_p) {
1120 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1121 "attribute\n", __FILE__, __LINE__);
1122 return 0;
1123 }
1124
1125 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1126 VETH_MCAST_FILTER_SIZE, NULL);
1127 if(!mcastFilterSize_p) {
1128 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1129 "VETH_MCAST_FILTER_SIZE attribute\n",
1130 __FILE__, __LINE__);
1131 return 0;
1132 }
1133
1134 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1135
1136 if(!netdev)
1137 return -ENOMEM;
1138
1139 adapter = netdev->priv;
1140 dev->dev.driver_data = netdev;
1141
1142 adapter->vdev = dev;
1143 adapter->netdev = netdev;
1144 adapter->mcastFilterSize= *mcastFilterSize_p;
1145 adapter->pool_config = 0;
1146
1147 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1148
1149 /* Some older boxes running PHYP non-natively have an OF that
1150 returns a 8-byte local-mac-address field (and the first
1151 2 bytes have to be ignored) while newer boxes' OF return
1152 a 6-byte field. Note that IEEE 1275 specifies that
1153 local-mac-address must be a 6-byte field.
1154 The RPA doc specifies that the first byte must be 10b, so
1155 we'll just look for it to solve this 8 vs. 6 byte field issue */
1156
1157 if ((*mac_addr_p & 0x3) != 0x02)
1158 mac_addr_p += 2;
1159
1160 adapter->mac_addr = 0;
1161 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1162
1163 netdev->irq = dev->irq;
1164 netdev->open = ibmveth_open;
1165 netdev->stop = ibmveth_close;
1166 netdev->hard_start_xmit = ibmveth_start_xmit;
1167 netdev->set_multicast_list = ibmveth_set_multicast_list;
1168 netdev->do_ioctl = ibmveth_ioctl;
1169 netdev->ethtool_ops = &netdev_ethtool_ops;
1170 netdev->change_mtu = ibmveth_change_mtu;
1171 SET_NETDEV_DEV(netdev, &dev->dev);
1172 #ifdef CONFIG_NET_POLL_CONTROLLER
1173 netdev->poll_controller = ibmveth_poll_controller;
1174 #endif
1175 netdev->features |= NETIF_F_LLTX;
1176 spin_lock_init(&adapter->stats_lock);
1177
1178 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1179
1180 for(i = 0; i<IbmVethNumBufferPools; i++) {
1181 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1182 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1183 pool_count[i], pool_size[i],
1184 pool_active[i]);
1185 kobj->parent = &dev->dev.kobj;
1186 kobject_set_name(kobj, "pool%d", i);
1187 kobj->ktype = &ktype_veth_pool;
1188 kobject_register(kobj);
1189 }
1190
1191 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1192
1193 adapter->buffer_list_dma = DMA_ERROR_CODE;
1194 adapter->filter_list_dma = DMA_ERROR_CODE;
1195 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1196
1197 ibmveth_debug_printk("registering netdev...\n");
1198
1199 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
1200
1201 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
1202 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
1203 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
1204 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
1205
1206 ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
1207
1208 if (ret == H_SUCCESS) {
1209 adapter->rx_csum = 1;
1210 netdev->features |= NETIF_F_IP_CSUM;
1211 } else
1212 ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
1213 }
1214
1215 rc = register_netdev(netdev);
1216
1217 if(rc) {
1218 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1219 free_netdev(netdev);
1220 return rc;
1221 }
1222
1223 ibmveth_debug_printk("registered\n");
1224
1225 ibmveth_proc_register_adapter(adapter);
1226
1227 return 0;
1228 }
1229
1230 static int __devexit ibmveth_remove(struct vio_dev *dev)
1231 {
1232 struct net_device *netdev = dev->dev.driver_data;
1233 struct ibmveth_adapter *adapter = netdev->priv;
1234 int i;
1235
1236 for(i = 0; i<IbmVethNumBufferPools; i++)
1237 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1238
1239 unregister_netdev(netdev);
1240
1241 ibmveth_proc_unregister_adapter(adapter);
1242
1243 free_netdev(netdev);
1244 return 0;
1245 }
1246
1247 #ifdef CONFIG_PROC_FS
1248 static void ibmveth_proc_register_driver(void)
1249 {
1250 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1251 if (ibmveth_proc_dir) {
1252 }
1253 }
1254
1255 static void ibmveth_proc_unregister_driver(void)
1256 {
1257 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1258 }
1259
1260 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1261 {
1262 if (*pos == 0) {
1263 return (void *)1;
1264 } else {
1265 return NULL;
1266 }
1267 }
1268
1269 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1270 {
1271 ++*pos;
1272 return NULL;
1273 }
1274
1275 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1276 {
1277 }
1278
1279 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1280 {
1281 struct ibmveth_adapter *adapter = seq->private;
1282 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1283 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1284 DECLARE_MAC_BUF(mac);
1285
1286 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1287
1288 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1289 seq_printf(seq, "Current MAC: %s\n", print_mac(mac, current_mac));
1290 seq_printf(seq, "Firmware MAC: %s\n", print_mac(mac, firmware_mac));
1291
1292 seq_printf(seq, "\nAdapter Statistics:\n");
1293 seq_printf(seq, " TX: vio_map_single failres: %ld\n", adapter->tx_map_failed);
1294 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1295 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1296 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1297 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1298 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1299 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1300
1301 return 0;
1302 }
1303 static struct seq_operations ibmveth_seq_ops = {
1304 .start = ibmveth_seq_start,
1305 .next = ibmveth_seq_next,
1306 .stop = ibmveth_seq_stop,
1307 .show = ibmveth_seq_show,
1308 };
1309
1310 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1311 {
1312 struct seq_file *seq;
1313 struct proc_dir_entry *proc;
1314 int rc;
1315
1316 rc = seq_open(file, &ibmveth_seq_ops);
1317 if (!rc) {
1318 /* recover the pointer buried in proc_dir_entry data */
1319 seq = file->private_data;
1320 proc = PDE(inode);
1321 seq->private = proc->data;
1322 }
1323 return rc;
1324 }
1325
1326 static const struct file_operations ibmveth_proc_fops = {
1327 .owner = THIS_MODULE,
1328 .open = ibmveth_proc_open,
1329 .read = seq_read,
1330 .llseek = seq_lseek,
1331 .release = seq_release,
1332 };
1333
1334 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1335 {
1336 struct proc_dir_entry *entry;
1337 if (ibmveth_proc_dir) {
1338 char u_addr[10];
1339 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1340 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1341 if (!entry) {
1342 ibmveth_error_printk("Cannot create adapter proc entry");
1343 } else {
1344 entry->data = (void *) adapter;
1345 entry->proc_fops = &ibmveth_proc_fops;
1346 }
1347 }
1348 return;
1349 }
1350
1351 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1352 {
1353 if (ibmveth_proc_dir) {
1354 char u_addr[10];
1355 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1356 remove_proc_entry(u_addr, ibmveth_proc_dir);
1357 }
1358 }
1359
1360 #else /* CONFIG_PROC_FS */
1361 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1362 {
1363 }
1364
1365 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1366 {
1367 }
1368 static void ibmveth_proc_register_driver(void)
1369 {
1370 }
1371
1372 static void ibmveth_proc_unregister_driver(void)
1373 {
1374 }
1375 #endif /* CONFIG_PROC_FS */
1376
1377 static struct attribute veth_active_attr;
1378 static struct attribute veth_num_attr;
1379 static struct attribute veth_size_attr;
1380
1381 static ssize_t veth_pool_show(struct kobject * kobj,
1382 struct attribute * attr, char * buf)
1383 {
1384 struct ibmveth_buff_pool *pool = container_of(kobj,
1385 struct ibmveth_buff_pool,
1386 kobj);
1387
1388 if (attr == &veth_active_attr)
1389 return sprintf(buf, "%d\n", pool->active);
1390 else if (attr == &veth_num_attr)
1391 return sprintf(buf, "%d\n", pool->size);
1392 else if (attr == &veth_size_attr)
1393 return sprintf(buf, "%d\n", pool->buff_size);
1394 return 0;
1395 }
1396
1397 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1398 const char * buf, size_t count)
1399 {
1400 struct ibmveth_buff_pool *pool = container_of(kobj,
1401 struct ibmveth_buff_pool,
1402 kobj);
1403 struct net_device *netdev =
1404 container_of(kobj->parent, struct device, kobj)->driver_data;
1405 struct ibmveth_adapter *adapter = netdev->priv;
1406 long value = simple_strtol(buf, NULL, 10);
1407 long rc;
1408
1409 if (attr == &veth_active_attr) {
1410 if (value && !pool->active) {
1411 if (netif_running(netdev)) {
1412 if(ibmveth_alloc_buffer_pool(pool)) {
1413 ibmveth_error_printk("unable to alloc pool\n");
1414 return -ENOMEM;
1415 }
1416 pool->active = 1;
1417 adapter->pool_config = 1;
1418 ibmveth_close(netdev);
1419 adapter->pool_config = 0;
1420 if ((rc = ibmveth_open(netdev)))
1421 return rc;
1422 } else
1423 pool->active = 1;
1424 } else if (!value && pool->active) {
1425 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1426 int i;
1427 /* Make sure there is a buffer pool with buffers that
1428 can hold a packet of the size of the MTU */
1429 for (i = 0; i < IbmVethNumBufferPools; i++) {
1430 if (pool == &adapter->rx_buff_pool[i])
1431 continue;
1432 if (!adapter->rx_buff_pool[i].active)
1433 continue;
1434 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1435 break;
1436 }
1437
1438 if (i == IbmVethNumBufferPools) {
1439 ibmveth_error_printk("no active pool >= MTU\n");
1440 return -EPERM;
1441 }
1442
1443 pool->active = 0;
1444 if (netif_running(netdev)) {
1445 adapter->pool_config = 1;
1446 ibmveth_close(netdev);
1447 adapter->pool_config = 0;
1448 if ((rc = ibmveth_open(netdev)))
1449 return rc;
1450 }
1451 }
1452 } else if (attr == &veth_num_attr) {
1453 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1454 return -EINVAL;
1455 else {
1456 if (netif_running(netdev)) {
1457 adapter->pool_config = 1;
1458 ibmveth_close(netdev);
1459 adapter->pool_config = 0;
1460 pool->size = value;
1461 if ((rc = ibmveth_open(netdev)))
1462 return rc;
1463 } else
1464 pool->size = value;
1465 }
1466 } else if (attr == &veth_size_attr) {
1467 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1468 return -EINVAL;
1469 else {
1470 if (netif_running(netdev)) {
1471 adapter->pool_config = 1;
1472 ibmveth_close(netdev);
1473 adapter->pool_config = 0;
1474 pool->buff_size = value;
1475 if ((rc = ibmveth_open(netdev)))
1476 return rc;
1477 } else
1478 pool->buff_size = value;
1479 }
1480 }
1481
1482 /* kick the interrupt handler to allocate/deallocate pools */
1483 ibmveth_interrupt(netdev->irq, netdev);
1484 return count;
1485 }
1486
1487
1488 #define ATTR(_name, _mode) \
1489 struct attribute veth_##_name##_attr = { \
1490 .name = __stringify(_name), .mode = _mode, \
1491 };
1492
1493 static ATTR(active, 0644);
1494 static ATTR(num, 0644);
1495 static ATTR(size, 0644);
1496
1497 static struct attribute * veth_pool_attrs[] = {
1498 &veth_active_attr,
1499 &veth_num_attr,
1500 &veth_size_attr,
1501 NULL,
1502 };
1503
1504 static struct sysfs_ops veth_pool_ops = {
1505 .show = veth_pool_show,
1506 .store = veth_pool_store,
1507 };
1508
1509 static struct kobj_type ktype_veth_pool = {
1510 .release = NULL,
1511 .sysfs_ops = &veth_pool_ops,
1512 .default_attrs = veth_pool_attrs,
1513 };
1514
1515
1516 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1517 { "network", "IBM,l-lan"},
1518 { "", "" }
1519 };
1520 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1521
1522 static struct vio_driver ibmveth_driver = {
1523 .id_table = ibmveth_device_table,
1524 .probe = ibmveth_probe,
1525 .remove = ibmveth_remove,
1526 .driver = {
1527 .name = ibmveth_driver_name,
1528 .owner = THIS_MODULE,
1529 }
1530 };
1531
1532 static int __init ibmveth_module_init(void)
1533 {
1534 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1535
1536 ibmveth_proc_register_driver();
1537
1538 return vio_register_driver(&ibmveth_driver);
1539 }
1540
1541 static void __exit ibmveth_module_exit(void)
1542 {
1543 vio_unregister_driver(&ibmveth_driver);
1544 ibmveth_proc_unregister_driver();
1545 }
1546
1547 module_init(ibmveth_module_init);
1548 module_exit(ibmveth_module_exit);
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