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[NET] drivers/net: statistics cleanup #1 -- save memory and shrink code
[deliverable/linux.git] / drivers / net / ibmveth.c
1 /**************************************************************************/
2 /* */
3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver */
4 /* Copyright (C) 2003 IBM Corp. */
5 /* Originally written by Dave Larson (larson1@us.ibm.com) */
6 /* Maintained by Santiago Leon (santil@us.ibm.com) */
7 /* */
8 /* This program is free software; you can redistribute it and/or modify */
9 /* it under the terms of the GNU General Public License as published by */
10 /* the Free Software Foundation; either version 2 of the License, or */
11 /* (at your option) any later version. */
12 /* */
13 /* This program is distributed in the hope that it will be useful, */
14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
16 /* GNU General Public License for more details. */
17 /* */
18 /* You should have received a copy of the GNU General Public License */
19 /* along with this program; if not, write to the Free Software */
20 /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
21 /* USA */
22 /* */
23 /* This module contains the implementation of a virtual ethernet device */
24 /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */
25 /* option of the RS/6000 Platform Architechture to interface with virtual */
26 /* ethernet NICs that are presented to the partition by the hypervisor. */
27 /* */
28 /**************************************************************************/
29 /*
30 TODO:
31 - 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_stats_count(struct net_device *dev)
806 {
807 return ARRAY_SIZE(ibmveth_stats);
808 }
809
810 static void ibmveth_get_ethtool_stats(struct net_device *dev,
811 struct ethtool_stats *stats, u64 *data)
812 {
813 int i;
814 struct ibmveth_adapter *adapter = dev->priv;
815
816 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
817 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
818 }
819
820 static const struct ethtool_ops netdev_ethtool_ops = {
821 .get_drvinfo = netdev_get_drvinfo,
822 .get_settings = netdev_get_settings,
823 .get_link = netdev_get_link,
824 .get_sg = ethtool_op_get_sg,
825 .get_tx_csum = ethtool_op_get_tx_csum,
826 .set_tx_csum = ibmveth_set_tx_csum,
827 .get_rx_csum = ibmveth_get_rx_csum,
828 .set_rx_csum = ibmveth_set_rx_csum,
829 .get_tso = ethtool_op_get_tso,
830 .get_ufo = ethtool_op_get_ufo,
831 .get_strings = ibmveth_get_strings,
832 .get_stats_count = ibmveth_get_stats_count,
833 .get_ethtool_stats = ibmveth_get_ethtool_stats,
834 };
835
836 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
837 {
838 return -EOPNOTSUPP;
839 }
840
841 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
842
843 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
844 {
845 struct ibmveth_adapter *adapter = netdev->priv;
846 union ibmveth_buf_desc desc;
847 unsigned long lpar_rc;
848 unsigned long correlator;
849 unsigned long flags;
850 unsigned int retry_count;
851 unsigned int tx_dropped = 0;
852 unsigned int tx_bytes = 0;
853 unsigned int tx_packets = 0;
854 unsigned int tx_send_failed = 0;
855 unsigned int tx_map_failed = 0;
856
857 desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
858 desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
859 skb->len, DMA_TO_DEVICE);
860
861 if (skb->ip_summed == CHECKSUM_PARTIAL &&
862 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
863 ibmveth_error_printk("tx: failed to checksum packet\n");
864 tx_dropped++;
865 goto out;
866 }
867
868 if (skb->ip_summed == CHECKSUM_PARTIAL) {
869 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
870
871 desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
872
873 /* Need to zero out the checksum */
874 buf[0] = 0;
875 buf[1] = 0;
876 }
877
878 if (dma_mapping_error(desc.fields.address)) {
879 ibmveth_error_printk("tx: unable to map xmit buffer\n");
880 tx_map_failed++;
881 tx_dropped++;
882 goto out;
883 }
884
885 /* send the frame. Arbitrarily set retrycount to 1024 */
886 correlator = 0;
887 retry_count = 1024;
888 do {
889 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
890 desc.desc, 0, 0, 0, 0, 0,
891 correlator, &correlator);
892 } while ((lpar_rc == H_BUSY) && (retry_count--));
893
894 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
895 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
896 ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
897 (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
898 skb->len, desc.fields.address);
899 tx_send_failed++;
900 tx_dropped++;
901 } else {
902 tx_packets++;
903 tx_bytes += skb->len;
904 netdev->trans_start = jiffies;
905 }
906
907 dma_unmap_single(&adapter->vdev->dev, desc.fields.address,
908 skb->len, DMA_TO_DEVICE);
909
910 out: spin_lock_irqsave(&adapter->stats_lock, flags);
911 netdev->stats.tx_dropped += tx_dropped;
912 netdev->stats.tx_bytes += tx_bytes;
913 netdev->stats.tx_packets += tx_packets;
914 adapter->tx_send_failed += tx_send_failed;
915 adapter->tx_map_failed += tx_map_failed;
916 spin_unlock_irqrestore(&adapter->stats_lock, flags);
917
918 dev_kfree_skb(skb);
919 return 0;
920 }
921
922 static int ibmveth_poll(struct napi_struct *napi, int budget)
923 {
924 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
925 struct net_device *netdev = adapter->netdev;
926 int frames_processed = 0;
927 unsigned long lpar_rc;
928
929 restart_poll:
930 do {
931 struct sk_buff *skb;
932
933 if (!ibmveth_rxq_pending_buffer(adapter))
934 break;
935
936 rmb();
937 if (!ibmveth_rxq_buffer_valid(adapter)) {
938 wmb(); /* suggested by larson1 */
939 adapter->rx_invalid_buffer++;
940 ibmveth_debug_printk("recycling invalid buffer\n");
941 ibmveth_rxq_recycle_buffer(adapter);
942 } else {
943 int length = ibmveth_rxq_frame_length(adapter);
944 int offset = ibmveth_rxq_frame_offset(adapter);
945 int csum_good = ibmveth_rxq_csum_good(adapter);
946
947 skb = ibmveth_rxq_get_buffer(adapter);
948 if (csum_good)
949 skb->ip_summed = CHECKSUM_UNNECESSARY;
950
951 ibmveth_rxq_harvest_buffer(adapter);
952
953 skb_reserve(skb, offset);
954 skb_put(skb, length);
955 skb->protocol = eth_type_trans(skb, netdev);
956
957 netif_receive_skb(skb); /* send it up */
958
959 netdev->stats.rx_packets++;
960 netdev->stats.rx_bytes += length;
961 frames_processed++;
962 netdev->last_rx = jiffies;
963 }
964 } while (frames_processed < budget);
965
966 ibmveth_replenish_task(adapter);
967
968 if (frames_processed < budget) {
969 /* We think we are done - reenable interrupts,
970 * then check once more to make sure we are done.
971 */
972 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
973 VIO_IRQ_ENABLE);
974
975 ibmveth_assert(lpar_rc == H_SUCCESS);
976
977 netif_rx_complete(netdev, napi);
978
979 if (ibmveth_rxq_pending_buffer(adapter) &&
980 netif_rx_reschedule(netdev, napi)) {
981 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
982 VIO_IRQ_DISABLE);
983 goto restart_poll;
984 }
985 }
986
987 return frames_processed;
988 }
989
990 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
991 {
992 struct net_device *netdev = dev_instance;
993 struct ibmveth_adapter *adapter = netdev->priv;
994 unsigned long lpar_rc;
995
996 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
997 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
998 VIO_IRQ_DISABLE);
999 ibmveth_assert(lpar_rc == H_SUCCESS);
1000 __netif_rx_schedule(netdev, &adapter->napi);
1001 }
1002 return IRQ_HANDLED;
1003 }
1004
1005 static void ibmveth_set_multicast_list(struct net_device *netdev)
1006 {
1007 struct ibmveth_adapter *adapter = netdev->priv;
1008 unsigned long lpar_rc;
1009
1010 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
1011 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1012 IbmVethMcastEnableRecv |
1013 IbmVethMcastDisableFiltering,
1014 0);
1015 if(lpar_rc != H_SUCCESS) {
1016 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1017 }
1018 } else {
1019 struct dev_mc_list *mclist = netdev->mc_list;
1020 int i;
1021 /* clear the filter table & disable filtering */
1022 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1023 IbmVethMcastEnableRecv |
1024 IbmVethMcastDisableFiltering |
1025 IbmVethMcastClearFilterTable,
1026 0);
1027 if(lpar_rc != H_SUCCESS) {
1028 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1029 }
1030 /* add the addresses to the filter table */
1031 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
1032 // add the multicast address to the filter table
1033 unsigned long mcast_addr = 0;
1034 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
1035 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1036 IbmVethMcastAddFilter,
1037 mcast_addr);
1038 if(lpar_rc != H_SUCCESS) {
1039 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1040 }
1041 }
1042
1043 /* re-enable filtering */
1044 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1045 IbmVethMcastEnableFiltering,
1046 0);
1047 if(lpar_rc != H_SUCCESS) {
1048 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1049 }
1050 }
1051 }
1052
1053 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1054 {
1055 struct ibmveth_adapter *adapter = dev->priv;
1056 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1057 int reinit = 0;
1058 int i, rc;
1059
1060 if (new_mtu < IBMVETH_MAX_MTU)
1061 return -EINVAL;
1062
1063 for (i = 0; i < IbmVethNumBufferPools; i++)
1064 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1065 break;
1066
1067 if (i == IbmVethNumBufferPools)
1068 return -EINVAL;
1069
1070 /* Look for an active buffer pool that can hold the new MTU */
1071 for(i = 0; i<IbmVethNumBufferPools; i++) {
1072 if (!adapter->rx_buff_pool[i].active) {
1073 adapter->rx_buff_pool[i].active = 1;
1074 reinit = 1;
1075 }
1076
1077 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1078 if (reinit && netif_running(adapter->netdev)) {
1079 adapter->pool_config = 1;
1080 ibmveth_close(adapter->netdev);
1081 adapter->pool_config = 0;
1082 dev->mtu = new_mtu;
1083 if ((rc = ibmveth_open(adapter->netdev)))
1084 return rc;
1085 } else
1086 dev->mtu = new_mtu;
1087 return 0;
1088 }
1089 }
1090 return -EINVAL;
1091 }
1092
1093 #ifdef CONFIG_NET_POLL_CONTROLLER
1094 static void ibmveth_poll_controller(struct net_device *dev)
1095 {
1096 ibmveth_replenish_task(dev->priv);
1097 ibmveth_interrupt(dev->irq, dev);
1098 }
1099 #endif
1100
1101 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1102 {
1103 int rc, i;
1104 long ret;
1105 struct net_device *netdev;
1106 struct ibmveth_adapter *adapter;
1107 u64 set_attr, ret_attr;
1108
1109 unsigned char *mac_addr_p;
1110 unsigned int *mcastFilterSize_p;
1111
1112
1113 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1114 dev->unit_address);
1115
1116 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1117 VETH_MAC_ADDR, NULL);
1118 if(!mac_addr_p) {
1119 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1120 "attribute\n", __FILE__, __LINE__);
1121 return 0;
1122 }
1123
1124 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1125 VETH_MCAST_FILTER_SIZE, NULL);
1126 if(!mcastFilterSize_p) {
1127 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1128 "VETH_MCAST_FILTER_SIZE attribute\n",
1129 __FILE__, __LINE__);
1130 return 0;
1131 }
1132
1133 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1134
1135 if(!netdev)
1136 return -ENOMEM;
1137
1138 adapter = netdev->priv;
1139 dev->dev.driver_data = netdev;
1140
1141 adapter->vdev = dev;
1142 adapter->netdev = netdev;
1143 adapter->mcastFilterSize= *mcastFilterSize_p;
1144 adapter->pool_config = 0;
1145
1146 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1147
1148 /* Some older boxes running PHYP non-natively have an OF that
1149 returns a 8-byte local-mac-address field (and the first
1150 2 bytes have to be ignored) while newer boxes' OF return
1151 a 6-byte field. Note that IEEE 1275 specifies that
1152 local-mac-address must be a 6-byte field.
1153 The RPA doc specifies that the first byte must be 10b, so
1154 we'll just look for it to solve this 8 vs. 6 byte field issue */
1155
1156 if ((*mac_addr_p & 0x3) != 0x02)
1157 mac_addr_p += 2;
1158
1159 adapter->mac_addr = 0;
1160 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1161
1162 netdev->irq = dev->irq;
1163 netdev->open = ibmveth_open;
1164 netdev->stop = ibmveth_close;
1165 netdev->hard_start_xmit = ibmveth_start_xmit;
1166 netdev->set_multicast_list = ibmveth_set_multicast_list;
1167 netdev->do_ioctl = ibmveth_ioctl;
1168 netdev->ethtool_ops = &netdev_ethtool_ops;
1169 netdev->change_mtu = ibmveth_change_mtu;
1170 SET_NETDEV_DEV(netdev, &dev->dev);
1171 #ifdef CONFIG_NET_POLL_CONTROLLER
1172 netdev->poll_controller = ibmveth_poll_controller;
1173 #endif
1174 netdev->features |= NETIF_F_LLTX;
1175 spin_lock_init(&adapter->stats_lock);
1176
1177 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1178
1179 for(i = 0; i<IbmVethNumBufferPools; i++) {
1180 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1181 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1182 pool_count[i], pool_size[i],
1183 pool_active[i]);
1184 kobj->parent = &dev->dev.kobj;
1185 sprintf(kobj->name, "pool%d", i);
1186 kobj->ktype = &ktype_veth_pool;
1187 kobject_register(kobj);
1188 }
1189
1190 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1191
1192 adapter->buffer_list_dma = DMA_ERROR_CODE;
1193 adapter->filter_list_dma = DMA_ERROR_CODE;
1194 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1195
1196 ibmveth_debug_printk("registering netdev...\n");
1197
1198 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
1199
1200 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
1201 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
1202 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
1203 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
1204
1205 ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
1206
1207 if (ret == H_SUCCESS) {
1208 adapter->rx_csum = 1;
1209 netdev->features |= NETIF_F_IP_CSUM;
1210 } else
1211 ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
1212 }
1213
1214 rc = register_netdev(netdev);
1215
1216 if(rc) {
1217 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1218 free_netdev(netdev);
1219 return rc;
1220 }
1221
1222 ibmveth_debug_printk("registered\n");
1223
1224 ibmveth_proc_register_adapter(adapter);
1225
1226 return 0;
1227 }
1228
1229 static int __devexit ibmveth_remove(struct vio_dev *dev)
1230 {
1231 struct net_device *netdev = dev->dev.driver_data;
1232 struct ibmveth_adapter *adapter = netdev->priv;
1233 int i;
1234
1235 for(i = 0; i<IbmVethNumBufferPools; i++)
1236 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1237
1238 unregister_netdev(netdev);
1239
1240 ibmveth_proc_unregister_adapter(adapter);
1241
1242 free_netdev(netdev);
1243 return 0;
1244 }
1245
1246 #ifdef CONFIG_PROC_FS
1247 static void ibmveth_proc_register_driver(void)
1248 {
1249 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1250 if (ibmveth_proc_dir) {
1251 }
1252 }
1253
1254 static void ibmveth_proc_unregister_driver(void)
1255 {
1256 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1257 }
1258
1259 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1260 {
1261 if (*pos == 0) {
1262 return (void *)1;
1263 } else {
1264 return NULL;
1265 }
1266 }
1267
1268 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1269 {
1270 ++*pos;
1271 return NULL;
1272 }
1273
1274 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1275 {
1276 }
1277
1278 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1279 {
1280 struct ibmveth_adapter *adapter = seq->private;
1281 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1282 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1283
1284 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1285
1286 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1287 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1288 current_mac[0], current_mac[1], current_mac[2],
1289 current_mac[3], current_mac[4], current_mac[5]);
1290 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1291 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1292 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1293
1294 seq_printf(seq, "\nAdapter Statistics:\n");
1295 seq_printf(seq, " TX: vio_map_single failres: %ld\n", adapter->tx_map_failed);
1296 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1297 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1298 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1299 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1300 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1301 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1302
1303 return 0;
1304 }
1305 static struct seq_operations ibmveth_seq_ops = {
1306 .start = ibmveth_seq_start,
1307 .next = ibmveth_seq_next,
1308 .stop = ibmveth_seq_stop,
1309 .show = ibmveth_seq_show,
1310 };
1311
1312 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1313 {
1314 struct seq_file *seq;
1315 struct proc_dir_entry *proc;
1316 int rc;
1317
1318 rc = seq_open(file, &ibmveth_seq_ops);
1319 if (!rc) {
1320 /* recover the pointer buried in proc_dir_entry data */
1321 seq = file->private_data;
1322 proc = PDE(inode);
1323 seq->private = proc->data;
1324 }
1325 return rc;
1326 }
1327
1328 static const struct file_operations ibmveth_proc_fops = {
1329 .owner = THIS_MODULE,
1330 .open = ibmveth_proc_open,
1331 .read = seq_read,
1332 .llseek = seq_lseek,
1333 .release = seq_release,
1334 };
1335
1336 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1337 {
1338 struct proc_dir_entry *entry;
1339 if (ibmveth_proc_dir) {
1340 char u_addr[10];
1341 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1342 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1343 if (!entry) {
1344 ibmveth_error_printk("Cannot create adapter proc entry");
1345 } else {
1346 entry->data = (void *) adapter;
1347 entry->proc_fops = &ibmveth_proc_fops;
1348 }
1349 }
1350 return;
1351 }
1352
1353 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1354 {
1355 if (ibmveth_proc_dir) {
1356 char u_addr[10];
1357 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1358 remove_proc_entry(u_addr, ibmveth_proc_dir);
1359 }
1360 }
1361
1362 #else /* CONFIG_PROC_FS */
1363 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1364 {
1365 }
1366
1367 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1368 {
1369 }
1370 static void ibmveth_proc_register_driver(void)
1371 {
1372 }
1373
1374 static void ibmveth_proc_unregister_driver(void)
1375 {
1376 }
1377 #endif /* CONFIG_PROC_FS */
1378
1379 static struct attribute veth_active_attr;
1380 static struct attribute veth_num_attr;
1381 static struct attribute veth_size_attr;
1382
1383 static ssize_t veth_pool_show(struct kobject * kobj,
1384 struct attribute * attr, char * buf)
1385 {
1386 struct ibmveth_buff_pool *pool = container_of(kobj,
1387 struct ibmveth_buff_pool,
1388 kobj);
1389
1390 if (attr == &veth_active_attr)
1391 return sprintf(buf, "%d\n", pool->active);
1392 else if (attr == &veth_num_attr)
1393 return sprintf(buf, "%d\n", pool->size);
1394 else if (attr == &veth_size_attr)
1395 return sprintf(buf, "%d\n", pool->buff_size);
1396 return 0;
1397 }
1398
1399 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1400 const char * buf, size_t count)
1401 {
1402 struct ibmveth_buff_pool *pool = container_of(kobj,
1403 struct ibmveth_buff_pool,
1404 kobj);
1405 struct net_device *netdev =
1406 container_of(kobj->parent, struct device, kobj)->driver_data;
1407 struct ibmveth_adapter *adapter = netdev->priv;
1408 long value = simple_strtol(buf, NULL, 10);
1409 long rc;
1410
1411 if (attr == &veth_active_attr) {
1412 if (value && !pool->active) {
1413 if (netif_running(netdev)) {
1414 if(ibmveth_alloc_buffer_pool(pool)) {
1415 ibmveth_error_printk("unable to alloc pool\n");
1416 return -ENOMEM;
1417 }
1418 pool->active = 1;
1419 adapter->pool_config = 1;
1420 ibmveth_close(netdev);
1421 adapter->pool_config = 0;
1422 if ((rc = ibmveth_open(netdev)))
1423 return rc;
1424 } else
1425 pool->active = 1;
1426 } else if (!value && pool->active) {
1427 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1428 int i;
1429 /* Make sure there is a buffer pool with buffers that
1430 can hold a packet of the size of the MTU */
1431 for (i = 0; i < IbmVethNumBufferPools; i++) {
1432 if (pool == &adapter->rx_buff_pool[i])
1433 continue;
1434 if (!adapter->rx_buff_pool[i].active)
1435 continue;
1436 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1437 break;
1438 }
1439
1440 if (i == IbmVethNumBufferPools) {
1441 ibmveth_error_printk("no active pool >= MTU\n");
1442 return -EPERM;
1443 }
1444
1445 pool->active = 0;
1446 if (netif_running(netdev)) {
1447 adapter->pool_config = 1;
1448 ibmveth_close(netdev);
1449 adapter->pool_config = 0;
1450 if ((rc = ibmveth_open(netdev)))
1451 return rc;
1452 }
1453 }
1454 } else if (attr == &veth_num_attr) {
1455 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1456 return -EINVAL;
1457 else {
1458 if (netif_running(netdev)) {
1459 adapter->pool_config = 1;
1460 ibmveth_close(netdev);
1461 adapter->pool_config = 0;
1462 pool->size = value;
1463 if ((rc = ibmveth_open(netdev)))
1464 return rc;
1465 } else
1466 pool->size = value;
1467 }
1468 } else if (attr == &veth_size_attr) {
1469 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1470 return -EINVAL;
1471 else {
1472 if (netif_running(netdev)) {
1473 adapter->pool_config = 1;
1474 ibmveth_close(netdev);
1475 adapter->pool_config = 0;
1476 pool->buff_size = value;
1477 if ((rc = ibmveth_open(netdev)))
1478 return rc;
1479 } else
1480 pool->buff_size = value;
1481 }
1482 }
1483
1484 /* kick the interrupt handler to allocate/deallocate pools */
1485 ibmveth_interrupt(netdev->irq, netdev);
1486 return count;
1487 }
1488
1489
1490 #define ATTR(_name, _mode) \
1491 struct attribute veth_##_name##_attr = { \
1492 .name = __stringify(_name), .mode = _mode, \
1493 };
1494
1495 static ATTR(active, 0644);
1496 static ATTR(num, 0644);
1497 static ATTR(size, 0644);
1498
1499 static struct attribute * veth_pool_attrs[] = {
1500 &veth_active_attr,
1501 &veth_num_attr,
1502 &veth_size_attr,
1503 NULL,
1504 };
1505
1506 static struct sysfs_ops veth_pool_ops = {
1507 .show = veth_pool_show,
1508 .store = veth_pool_store,
1509 };
1510
1511 static struct kobj_type ktype_veth_pool = {
1512 .release = NULL,
1513 .sysfs_ops = &veth_pool_ops,
1514 .default_attrs = veth_pool_attrs,
1515 };
1516
1517
1518 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1519 { "network", "IBM,l-lan"},
1520 { "", "" }
1521 };
1522 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1523
1524 static struct vio_driver ibmveth_driver = {
1525 .id_table = ibmveth_device_table,
1526 .probe = ibmveth_probe,
1527 .remove = ibmveth_remove,
1528 .driver = {
1529 .name = ibmveth_driver_name,
1530 .owner = THIS_MODULE,
1531 }
1532 };
1533
1534 static int __init ibmveth_module_init(void)
1535 {
1536 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1537
1538 ibmveth_proc_register_driver();
1539
1540 return vio_register_driver(&ibmveth_driver);
1541 }
1542
1543 static void __exit ibmveth_module_exit(void)
1544 {
1545 vio_unregister_driver(&ibmveth_driver);
1546 ibmveth_proc_unregister_driver();
1547 }
1548
1549 module_init(ibmveth_module_init);
1550 module_exit(ibmveth_module_exit);
Linux kernel - Deliverables
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