projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ibmveth: Remove redundant function prototypes
[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 #include <linux/module.h>
31 #include <linux/moduleparam.h>
32 #include <linux/types.h>
33 #include <linux/errno.h>
34 #include <linux/ioport.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/kernel.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/skbuff.h>
40 #include <linux/init.h>
41 #include <linux/delay.h>
42 #include <linux/mm.h>
43 #include <linux/pm.h>
44 #include <linux/ethtool.h>
45 #include <linux/in.h>
46 #include <linux/ip.h>
47 #include <linux/ipv6.h>
48 #include <linux/slab.h>
49 #include <asm/hvcall.h>
50 #include <asm/atomic.h>
51 #include <asm/vio.h>
52 #include <asm/iommu.h>
53 #include <asm/uaccess.h>
54 #include <asm/firmware.h>
55
56 #include "ibmveth.h"
57
58 #undef DEBUG
59
60 #define ibmveth_printk(fmt, args...) \
61 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
62
63 #define ibmveth_error_printk(fmt, args...) \
64 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
65
66 #ifdef DEBUG
67 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
68 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
69 #define ibmveth_debug_printk(fmt, args...) \
70 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
71 #define ibmveth_assert(expr) \
72 if(!(expr)) { \
73 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
74 BUG(); \
75 }
76 #else
77 #define ibmveth_debug_printk_no_adapter(fmt, args...)
78 #define ibmveth_debug_printk(fmt, args...)
79 #define ibmveth_assert(expr)
80 #endif
81
82 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
83 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
84 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
85
86 static struct kobj_type ktype_veth_pool;
87
88
89 static const char ibmveth_driver_name[] = "ibmveth";
90 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
91 #define ibmveth_driver_version "1.03"
92
93 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
94 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
95 MODULE_LICENSE("GPL");
96 MODULE_VERSION(ibmveth_driver_version);
97
98 static unsigned int tx_copybreak __read_mostly = 128;
99 module_param(tx_copybreak, uint, 0644);
100 MODULE_PARM_DESC(tx_copybreak,
101 "Maximum size of packet that is copied to a new buffer on transmit");
102
103 static unsigned int rx_copybreak __read_mostly = 128;
104 module_param(rx_copybreak, uint, 0644);
105 MODULE_PARM_DESC(rx_copybreak,
106 "Maximum size of packet that is copied to a new buffer on receive");
107
108 static unsigned int rx_flush __read_mostly = 0;
109 module_param(rx_flush, uint, 0644);
110 MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
111
112 struct ibmveth_stat {
113 char name[ETH_GSTRING_LEN];
114 int offset;
115 };
116
117 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
118 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
119
120 struct ibmveth_stat ibmveth_stats[] = {
121 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
122 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
123 { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
124 { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
125 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
126 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
127 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
128 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
129 { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
130 { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
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 * 7 / 8;
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 = kcalloc(pool->size, sizeof(void *), 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->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
209
210 for(i = 0; i < pool->size; ++i) {
211 pool->free_map[i] = i;
212 }
213
214 atomic_set(&pool->available, 0);
215 pool->producer_index = 0;
216 pool->consumer_index = 0;
217
218 return 0;
219 }
220
221 static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
222 {
223 unsigned long offset;
224
225 for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
226 asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
227 }
228
229 /* replenish the buffers for a pool. note that we don't need to
230 * skb_reserve these since they are used for incoming...
231 */
232 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
233 {
234 u32 i;
235 u32 count = pool->size - atomic_read(&pool->available);
236 u32 buffers_added = 0;
237 struct sk_buff *skb;
238 unsigned int free_index, index;
239 u64 correlator;
240 unsigned long lpar_rc;
241 dma_addr_t dma_addr;
242
243 mb();
244
245 for(i = 0; i < count; ++i) {
246 union ibmveth_buf_desc desc;
247
248 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
249
250 if(!skb) {
251 ibmveth_debug_printk("replenish: unable to allocate skb\n");
252 adapter->replenish_no_mem++;
253 break;
254 }
255
256 free_index = pool->consumer_index;
257 pool->consumer_index++;
258 if (pool->consumer_index >= pool->size)
259 pool->consumer_index = 0;
260 index = pool->free_map[free_index];
261
262 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
263 ibmveth_assert(pool->skbuff[index] == NULL);
264
265 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
266 pool->buff_size, DMA_FROM_DEVICE);
267
268 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
269 goto failure;
270
271 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
272 pool->dma_addr[index] = dma_addr;
273 pool->skbuff[index] = skb;
274
275 correlator = ((u64)pool->index << 32) | index;
276 *(u64*)skb->data = correlator;
277
278 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
279 desc.fields.address = dma_addr;
280
281 if (rx_flush) {
282 unsigned int len = min(pool->buff_size,
283 adapter->netdev->mtu +
284 IBMVETH_BUFF_OH);
285 ibmveth_flush_buffer(skb->data, len);
286 }
287 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
288
289 if (lpar_rc != H_SUCCESS)
290 goto failure;
291 else {
292 buffers_added++;
293 adapter->replenish_add_buff_success++;
294 }
295 }
296
297 mb();
298 atomic_add(buffers_added, &(pool->available));
299 return;
300
301 failure:
302 pool->free_map[free_index] = index;
303 pool->skbuff[index] = NULL;
304 if (pool->consumer_index == 0)
305 pool->consumer_index = pool->size - 1;
306 else
307 pool->consumer_index--;
308 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
309 dma_unmap_single(&adapter->vdev->dev,
310 pool->dma_addr[index], pool->buff_size,
311 DMA_FROM_DEVICE);
312 dev_kfree_skb_any(skb);
313 adapter->replenish_add_buff_failure++;
314
315 mb();
316 atomic_add(buffers_added, &(pool->available));
317 }
318
319 /* replenish routine */
320 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
321 {
322 int i;
323
324 adapter->replenish_task_cycles++;
325
326 for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) {
327 struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
328
329 if (pool->active &&
330 (atomic_read(&pool->available) < pool->threshold))
331 ibmveth_replenish_buffer_pool(adapter, pool);
332 }
333
334 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
335 }
336
337 /* empty and free ana buffer pool - also used to do cleanup in error paths */
338 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
339 {
340 int i;
341
342 kfree(pool->free_map);
343 pool->free_map = NULL;
344
345 if(pool->skbuff && pool->dma_addr) {
346 for(i = 0; i < pool->size; ++i) {
347 struct sk_buff *skb = pool->skbuff[i];
348 if(skb) {
349 dma_unmap_single(&adapter->vdev->dev,
350 pool->dma_addr[i],
351 pool->buff_size,
352 DMA_FROM_DEVICE);
353 dev_kfree_skb_any(skb);
354 pool->skbuff[i] = NULL;
355 }
356 }
357 }
358
359 if(pool->dma_addr) {
360 kfree(pool->dma_addr);
361 pool->dma_addr = NULL;
362 }
363
364 if(pool->skbuff) {
365 kfree(pool->skbuff);
366 pool->skbuff = NULL;
367 }
368 }
369
370 /* remove a buffer from a pool */
371 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
372 {
373 unsigned int pool = correlator >> 32;
374 unsigned int index = correlator & 0xffffffffUL;
375 unsigned int free_index;
376 struct sk_buff *skb;
377
378 ibmveth_assert(pool < IbmVethNumBufferPools);
379 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
380
381 skb = adapter->rx_buff_pool[pool].skbuff[index];
382
383 ibmveth_assert(skb != NULL);
384
385 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
386
387 dma_unmap_single(&adapter->vdev->dev,
388 adapter->rx_buff_pool[pool].dma_addr[index],
389 adapter->rx_buff_pool[pool].buff_size,
390 DMA_FROM_DEVICE);
391
392 free_index = adapter->rx_buff_pool[pool].producer_index;
393 adapter->rx_buff_pool[pool].producer_index++;
394 if (adapter->rx_buff_pool[pool].producer_index >=
395 adapter->rx_buff_pool[pool].size)
396 adapter->rx_buff_pool[pool].producer_index = 0;
397 adapter->rx_buff_pool[pool].free_map[free_index] = index;
398
399 mb();
400
401 atomic_dec(&(adapter->rx_buff_pool[pool].available));
402 }
403
404 /* get the current buffer on the rx queue */
405 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
406 {
407 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
408 unsigned int pool = correlator >> 32;
409 unsigned int index = correlator & 0xffffffffUL;
410
411 ibmveth_assert(pool < IbmVethNumBufferPools);
412 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
413
414 return adapter->rx_buff_pool[pool].skbuff[index];
415 }
416
417 /* recycle the current buffer on the rx queue */
418 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
419 {
420 u32 q_index = adapter->rx_queue.index;
421 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
422 unsigned int pool = correlator >> 32;
423 unsigned int index = correlator & 0xffffffffUL;
424 union ibmveth_buf_desc desc;
425 unsigned long lpar_rc;
426
427 ibmveth_assert(pool < IbmVethNumBufferPools);
428 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
429
430 if(!adapter->rx_buff_pool[pool].active) {
431 ibmveth_rxq_harvest_buffer(adapter);
432 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
433 return;
434 }
435
436 desc.fields.flags_len = IBMVETH_BUF_VALID |
437 adapter->rx_buff_pool[pool].buff_size;
438 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
439
440 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
441
442 if(lpar_rc != H_SUCCESS) {
443 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
444 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
445 }
446
447 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
448 adapter->rx_queue.index = 0;
449 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
450 }
451 }
452
453 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
454 {
455 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
456
457 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
458 adapter->rx_queue.index = 0;
459 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
460 }
461 }
462
463 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
464 {
465 int i;
466 struct device *dev = &adapter->vdev->dev;
467
468 if(adapter->buffer_list_addr != NULL) {
469 if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
470 dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
471 DMA_BIDIRECTIONAL);
472 adapter->buffer_list_dma = DMA_ERROR_CODE;
473 }
474 free_page((unsigned long)adapter->buffer_list_addr);
475 adapter->buffer_list_addr = NULL;
476 }
477
478 if(adapter->filter_list_addr != NULL) {
479 if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
480 dma_unmap_single(dev, adapter->filter_list_dma, 4096,
481 DMA_BIDIRECTIONAL);
482 adapter->filter_list_dma = DMA_ERROR_CODE;
483 }
484 free_page((unsigned long)adapter->filter_list_addr);
485 adapter->filter_list_addr = NULL;
486 }
487
488 if(adapter->rx_queue.queue_addr != NULL) {
489 if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
490 dma_unmap_single(dev,
491 adapter->rx_queue.queue_dma,
492 adapter->rx_queue.queue_len,
493 DMA_BIDIRECTIONAL);
494 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
495 }
496 kfree(adapter->rx_queue.queue_addr);
497 adapter->rx_queue.queue_addr = NULL;
498 }
499
500 for(i = 0; i<IbmVethNumBufferPools; i++)
501 if (adapter->rx_buff_pool[i].active)
502 ibmveth_free_buffer_pool(adapter,
503 &adapter->rx_buff_pool[i]);
504
505 if (adapter->bounce_buffer != NULL) {
506 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
507 dma_unmap_single(&adapter->vdev->dev,
508 adapter->bounce_buffer_dma,
509 adapter->netdev->mtu + IBMVETH_BUFF_OH,
510 DMA_BIDIRECTIONAL);
511 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
512 }
513 kfree(adapter->bounce_buffer);
514 adapter->bounce_buffer = NULL;
515 }
516 }
517
518 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
519 union ibmveth_buf_desc rxq_desc, u64 mac_address)
520 {
521 int rc, try_again = 1;
522
523 /* After a kexec the adapter will still be open, so our attempt to
524 * open it will fail. So if we get a failure we free the adapter and
525 * try again, but only once. */
526 retry:
527 rc = h_register_logical_lan(adapter->vdev->unit_address,
528 adapter->buffer_list_dma, rxq_desc.desc,
529 adapter->filter_list_dma, mac_address);
530
531 if (rc != H_SUCCESS && try_again) {
532 do {
533 rc = h_free_logical_lan(adapter->vdev->unit_address);
534 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
535
536 try_again = 0;
537 goto retry;
538 }
539
540 return rc;
541 }
542
543 static int ibmveth_open(struct net_device *netdev)
544 {
545 struct ibmveth_adapter *adapter = netdev_priv(netdev);
546 u64 mac_address = 0;
547 int rxq_entries = 1;
548 unsigned long lpar_rc;
549 int rc;
550 union ibmveth_buf_desc rxq_desc;
551 int i;
552 struct device *dev;
553
554 ibmveth_debug_printk("open starting\n");
555
556 napi_enable(&adapter->napi);
557
558 for(i = 0; i<IbmVethNumBufferPools; i++)
559 rxq_entries += adapter->rx_buff_pool[i].size;
560
561 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
562 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
563
564 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
565 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
566 ibmveth_cleanup(adapter);
567 napi_disable(&adapter->napi);
568 return -ENOMEM;
569 }
570
571 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
572 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
573
574 if(!adapter->rx_queue.queue_addr) {
575 ibmveth_error_printk("unable to allocate rx queue pages\n");
576 ibmveth_cleanup(adapter);
577 napi_disable(&adapter->napi);
578 return -ENOMEM;
579 }
580
581 dev = &adapter->vdev->dev;
582
583 adapter->buffer_list_dma = dma_map_single(dev,
584 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
585 adapter->filter_list_dma = dma_map_single(dev,
586 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
587 adapter->rx_queue.queue_dma = dma_map_single(dev,
588 adapter->rx_queue.queue_addr,
589 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
590
591 if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
592 (dma_mapping_error(dev, adapter->filter_list_dma)) ||
593 (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
594 ibmveth_error_printk("unable to map filter or buffer list pages\n");
595 ibmveth_cleanup(adapter);
596 napi_disable(&adapter->napi);
597 return -ENOMEM;
598 }
599
600 adapter->rx_queue.index = 0;
601 adapter->rx_queue.num_slots = rxq_entries;
602 adapter->rx_queue.toggle = 1;
603
604 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
605 mac_address = mac_address >> 16;
606
607 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
608 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
609
610 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
611 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
612 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
613
614 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
615
616 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
617
618 if(lpar_rc != H_SUCCESS) {
619 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
620 ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n",
621 adapter->buffer_list_dma,
622 adapter->filter_list_dma,
623 rxq_desc.desc,
624 mac_address);
625 ibmveth_cleanup(adapter);
626 napi_disable(&adapter->napi);
627 return -ENONET;
628 }
629
630 for(i = 0; i<IbmVethNumBufferPools; i++) {
631 if(!adapter->rx_buff_pool[i].active)
632 continue;
633 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
634 ibmveth_error_printk("unable to alloc pool\n");
635 adapter->rx_buff_pool[i].active = 0;
636 ibmveth_cleanup(adapter);
637 napi_disable(&adapter->napi);
638 return -ENOMEM ;
639 }
640 }
641
642 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
643 if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
644 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
645 do {
646 rc = h_free_logical_lan(adapter->vdev->unit_address);
647 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
648
649 ibmveth_cleanup(adapter);
650 napi_disable(&adapter->napi);
651 return rc;
652 }
653
654 adapter->bounce_buffer =
655 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
656 if (!adapter->bounce_buffer) {
657 ibmveth_error_printk("unable to allocate bounce buffer\n");
658 ibmveth_cleanup(adapter);
659 napi_disable(&adapter->napi);
660 return -ENOMEM;
661 }
662 adapter->bounce_buffer_dma =
663 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
664 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
665 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
666 ibmveth_error_printk("unable to map bounce buffer\n");
667 ibmveth_cleanup(adapter);
668 napi_disable(&adapter->napi);
669 return -ENOMEM;
670 }
671
672 ibmveth_debug_printk("initial replenish cycle\n");
673 ibmveth_interrupt(netdev->irq, netdev);
674
675 netif_start_queue(netdev);
676
677 ibmveth_debug_printk("open complete\n");
678
679 return 0;
680 }
681
682 static int ibmveth_close(struct net_device *netdev)
683 {
684 struct ibmveth_adapter *adapter = netdev_priv(netdev);
685 long lpar_rc;
686
687 ibmveth_debug_printk("close starting\n");
688
689 napi_disable(&adapter->napi);
690
691 if (!adapter->pool_config)
692 netif_stop_queue(netdev);
693
694 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
695
696 do {
697 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
698 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
699
700 if(lpar_rc != H_SUCCESS)
701 {
702 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
703 lpar_rc);
704 }
705
706 free_irq(netdev->irq, netdev);
707
708 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
709
710 ibmveth_cleanup(adapter);
711
712 ibmveth_debug_printk("close complete\n");
713
714 return 0;
715 }
716
717 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
718 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
719 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
720 cmd->speed = SPEED_1000;
721 cmd->duplex = DUPLEX_FULL;
722 cmd->port = PORT_FIBRE;
723 cmd->phy_address = 0;
724 cmd->transceiver = XCVR_INTERNAL;
725 cmd->autoneg = AUTONEG_ENABLE;
726 cmd->maxtxpkt = 0;
727 cmd->maxrxpkt = 1;
728 return 0;
729 }
730
731 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
732 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
733 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
734 }
735
736 static u32 netdev_get_link(struct net_device *dev) {
737 return 1;
738 }
739
740 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
741 {
742 struct ibmveth_adapter *adapter = netdev_priv(dev);
743
744 if (data)
745 adapter->rx_csum = 1;
746 else {
747 /*
748 * Since the ibmveth firmware interface does not have the concept of
749 * separate tx/rx checksum offload enable, if rx checksum is disabled
750 * we also have to disable tx checksum offload. Once we disable rx
751 * checksum offload, we are no longer allowed to send tx buffers that
752 * are not properly checksummed.
753 */
754 adapter->rx_csum = 0;
755 dev->features &= ~NETIF_F_IP_CSUM;
756 dev->features &= ~NETIF_F_IPV6_CSUM;
757 }
758 }
759
760 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
761 {
762 struct ibmveth_adapter *adapter = netdev_priv(dev);
763
764 if (data) {
765 if (adapter->fw_ipv4_csum_support)
766 dev->features |= NETIF_F_IP_CSUM;
767 if (adapter->fw_ipv6_csum_support)
768 dev->features |= NETIF_F_IPV6_CSUM;
769 adapter->rx_csum = 1;
770 } else {
771 dev->features &= ~NETIF_F_IP_CSUM;
772 dev->features &= ~NETIF_F_IPV6_CSUM;
773 }
774 }
775
776 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
777 void (*done) (struct net_device *, u32))
778 {
779 struct ibmveth_adapter *adapter = netdev_priv(dev);
780 unsigned long set_attr, clr_attr, ret_attr;
781 unsigned long set_attr6, clr_attr6;
782 long ret, ret6;
783 int rc1 = 0, rc2 = 0;
784 int restart = 0;
785
786 if (netif_running(dev)) {
787 restart = 1;
788 adapter->pool_config = 1;
789 ibmveth_close(dev);
790 adapter->pool_config = 0;
791 }
792
793 set_attr = 0;
794 clr_attr = 0;
795
796 if (data) {
797 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
798 set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
799 } else {
800 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
801 clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
802 }
803
804 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
805
806 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
807 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
808 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
809 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
810 set_attr, &ret_attr);
811
812 if (ret != H_SUCCESS) {
813 ibmveth_error_printk("unable to change IPv4 checksum "
814 "offload settings. %d rc=%ld\n",
815 data, ret);
816
817 ret = h_illan_attributes(adapter->vdev->unit_address,
818 set_attr, clr_attr, &ret_attr);
819 } else
820 adapter->fw_ipv4_csum_support = data;
821
822 ret6 = h_illan_attributes(adapter->vdev->unit_address,
823 clr_attr6, set_attr6, &ret_attr);
824
825 if (ret6 != H_SUCCESS) {
826 ibmveth_error_printk("unable to change IPv6 checksum "
827 "offload settings. %d rc=%ld\n",
828 data, ret);
829
830 ret = h_illan_attributes(adapter->vdev->unit_address,
831 set_attr6, clr_attr6,
832 &ret_attr);
833 } else
834 adapter->fw_ipv6_csum_support = data;
835
836 if (ret == H_SUCCESS || ret6 == H_SUCCESS)
837 done(dev, data);
838 else
839 rc1 = -EIO;
840 } else {
841 rc1 = -EIO;
842 ibmveth_error_printk("unable to change checksum offload settings."
843 " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
844 }
845
846 if (restart)
847 rc2 = ibmveth_open(dev);
848
849 return rc1 ? rc1 : rc2;
850 }
851
852 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
853 {
854 struct ibmveth_adapter *adapter = netdev_priv(dev);
855
856 if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
857 return 0;
858
859 return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
860 }
861
862 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
863 {
864 struct ibmveth_adapter *adapter = netdev_priv(dev);
865 int rc = 0;
866
867 if (data && (dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
868 return 0;
869 if (!data && !(dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
870 return 0;
871
872 if (data && !adapter->rx_csum)
873 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
874 else
875 ibmveth_set_tx_csum_flags(dev, data);
876
877 return rc;
878 }
879
880 static u32 ibmveth_get_rx_csum(struct net_device *dev)
881 {
882 struct ibmveth_adapter *adapter = netdev_priv(dev);
883 return adapter->rx_csum;
884 }
885
886 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
887 {
888 int i;
889
890 if (stringset != ETH_SS_STATS)
891 return;
892
893 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
894 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
895 }
896
897 static int ibmveth_get_sset_count(struct net_device *dev, int sset)
898 {
899 switch (sset) {
900 case ETH_SS_STATS:
901 return ARRAY_SIZE(ibmveth_stats);
902 default:
903 return -EOPNOTSUPP;
904 }
905 }
906
907 static void ibmveth_get_ethtool_stats(struct net_device *dev,
908 struct ethtool_stats *stats, u64 *data)
909 {
910 int i;
911 struct ibmveth_adapter *adapter = netdev_priv(dev);
912
913 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
914 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
915 }
916
917 static const struct ethtool_ops netdev_ethtool_ops = {
918 .get_drvinfo = netdev_get_drvinfo,
919 .get_settings = netdev_get_settings,
920 .get_link = netdev_get_link,
921 .set_tx_csum = ibmveth_set_tx_csum,
922 .get_rx_csum = ibmveth_get_rx_csum,
923 .set_rx_csum = ibmveth_set_rx_csum,
924 .get_strings = ibmveth_get_strings,
925 .get_sset_count = ibmveth_get_sset_count,
926 .get_ethtool_stats = ibmveth_get_ethtool_stats,
927 .set_sg = ethtool_op_set_sg,
928 };
929
930 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
931 {
932 return -EOPNOTSUPP;
933 }
934
935 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
936
937 static int ibmveth_send(struct ibmveth_adapter *adapter,
938 union ibmveth_buf_desc *descs)
939 {
940 unsigned long correlator;
941 unsigned int retry_count;
942 unsigned long ret;
943
944 /*
945 * The retry count sets a maximum for the number of broadcast and
946 * multicast destinations within the system.
947 */
948 retry_count = 1024;
949 correlator = 0;
950 do {
951 ret = h_send_logical_lan(adapter->vdev->unit_address,
952 descs[0].desc, descs[1].desc,
953 descs[2].desc, descs[3].desc,
954 descs[4].desc, descs[5].desc,
955 correlator, &correlator);
956 } while ((ret == H_BUSY) && (retry_count--));
957
958 if (ret != H_SUCCESS && ret != H_DROPPED) {
959 ibmveth_error_printk("tx: h_send_logical_lan failed with "
960 "rc=%ld\n", ret);
961 return 1;
962 }
963
964 return 0;
965 }
966
967 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
968 struct net_device *netdev)
969 {
970 struct ibmveth_adapter *adapter = netdev_priv(netdev);
971 unsigned int desc_flags;
972 union ibmveth_buf_desc descs[6];
973 int last, i;
974 int force_bounce = 0;
975
976 /*
977 * veth handles a maximum of 6 segments including the header, so
978 * we have to linearize the skb if there are more than this.
979 */
980 if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
981 netdev->stats.tx_dropped++;
982 goto out;
983 }
984
985 /* veth can't checksum offload UDP */
986 if (skb->ip_summed == CHECKSUM_PARTIAL &&
987 ((skb->protocol == htons(ETH_P_IP) &&
988 ip_hdr(skb)->protocol != IPPROTO_TCP) ||
989 (skb->protocol == htons(ETH_P_IPV6) &&
990 ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
991 skb_checksum_help(skb)) {
992
993 ibmveth_error_printk("tx: failed to checksum packet\n");
994 netdev->stats.tx_dropped++;
995 goto out;
996 }
997
998 desc_flags = IBMVETH_BUF_VALID;
999
1000 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1001 unsigned char *buf = skb_transport_header(skb) +
1002 skb->csum_offset;
1003
1004 desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
1005
1006 /* Need to zero out the checksum */
1007 buf[0] = 0;
1008 buf[1] = 0;
1009 }
1010
1011 retry_bounce:
1012 memset(descs, 0, sizeof(descs));
1013
1014 /*
1015 * If a linear packet is below the rx threshold then
1016 * copy it into the static bounce buffer. This avoids the
1017 * cost of a TCE insert and remove.
1018 */
1019 if (force_bounce || (!skb_is_nonlinear(skb) &&
1020 (skb->len < tx_copybreak))) {
1021 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
1022 skb->len);
1023
1024 descs[0].fields.flags_len = desc_flags | skb->len;
1025 descs[0].fields.address = adapter->bounce_buffer_dma;
1026
1027 if (ibmveth_send(adapter, descs)) {
1028 adapter->tx_send_failed++;
1029 netdev->stats.tx_dropped++;
1030 } else {
1031 netdev->stats.tx_packets++;
1032 netdev->stats.tx_bytes += skb->len;
1033 }
1034
1035 goto out;
1036 }
1037
1038 /* Map the header */
1039 descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
1040 skb_headlen(skb),
1041 DMA_TO_DEVICE);
1042 if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address))
1043 goto map_failed;
1044
1045 descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
1046
1047 /* Map the frags */
1048 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1049 unsigned long dma_addr;
1050 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1051
1052 dma_addr = dma_map_page(&adapter->vdev->dev, frag->page,
1053 frag->page_offset, frag->size,
1054 DMA_TO_DEVICE);
1055
1056 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
1057 goto map_failed_frags;
1058
1059 descs[i+1].fields.flags_len = desc_flags | frag->size;
1060 descs[i+1].fields.address = dma_addr;
1061 }
1062
1063 if (ibmveth_send(adapter, descs)) {
1064 adapter->tx_send_failed++;
1065 netdev->stats.tx_dropped++;
1066 } else {
1067 netdev->stats.tx_packets++;
1068 netdev->stats.tx_bytes += skb->len;
1069 }
1070
1071 for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++)
1072 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1073 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1074 DMA_TO_DEVICE);
1075
1076 out:
1077 dev_kfree_skb(skb);
1078 return NETDEV_TX_OK;
1079
1080 map_failed_frags:
1081 last = i+1;
1082 for (i = 0; i < last; i++)
1083 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1084 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1085 DMA_TO_DEVICE);
1086
1087 map_failed:
1088 if (!firmware_has_feature(FW_FEATURE_CMO))
1089 ibmveth_error_printk("tx: unable to map xmit buffer\n");
1090 adapter->tx_map_failed++;
1091 skb_linearize(skb);
1092 force_bounce = 1;
1093 goto retry_bounce;
1094 }
1095
1096 static int ibmveth_poll(struct napi_struct *napi, int budget)
1097 {
1098 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
1099 struct net_device *netdev = adapter->netdev;
1100 int frames_processed = 0;
1101 unsigned long lpar_rc;
1102
1103 restart_poll:
1104 do {
1105 if (!ibmveth_rxq_pending_buffer(adapter))
1106 break;
1107
1108 smp_rmb();
1109 if (!ibmveth_rxq_buffer_valid(adapter)) {
1110 wmb(); /* suggested by larson1 */
1111 adapter->rx_invalid_buffer++;
1112 ibmveth_debug_printk("recycling invalid buffer\n");
1113 ibmveth_rxq_recycle_buffer(adapter);
1114 } else {
1115 struct sk_buff *skb, *new_skb;
1116 int length = ibmveth_rxq_frame_length(adapter);
1117 int offset = ibmveth_rxq_frame_offset(adapter);
1118 int csum_good = ibmveth_rxq_csum_good(adapter);
1119
1120 skb = ibmveth_rxq_get_buffer(adapter);
1121
1122 new_skb = NULL;
1123 if (length < rx_copybreak)
1124 new_skb = netdev_alloc_skb(netdev, length);
1125
1126 if (new_skb) {
1127 skb_copy_to_linear_data(new_skb,
1128 skb->data + offset,
1129 length);
1130 if (rx_flush)
1131 ibmveth_flush_buffer(skb->data,
1132 length + offset);
1133 skb = new_skb;
1134 ibmveth_rxq_recycle_buffer(adapter);
1135 } else {
1136 ibmveth_rxq_harvest_buffer(adapter);
1137 skb_reserve(skb, offset);
1138 }
1139
1140 skb_put(skb, length);
1141 skb->protocol = eth_type_trans(skb, netdev);
1142
1143 if (csum_good)
1144 skb->ip_summed = CHECKSUM_UNNECESSARY;
1145
1146 netif_receive_skb(skb); /* send it up */
1147
1148 netdev->stats.rx_packets++;
1149 netdev->stats.rx_bytes += length;
1150 frames_processed++;
1151 }
1152 } while (frames_processed < budget);
1153
1154 ibmveth_replenish_task(adapter);
1155
1156 if (frames_processed < budget) {
1157 /* We think we are done - reenable interrupts,
1158 * then check once more to make sure we are done.
1159 */
1160 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1161 VIO_IRQ_ENABLE);
1162
1163 ibmveth_assert(lpar_rc == H_SUCCESS);
1164
1165 napi_complete(napi);
1166
1167 if (ibmveth_rxq_pending_buffer(adapter) &&
1168 napi_reschedule(napi)) {
1169 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1170 VIO_IRQ_DISABLE);
1171 goto restart_poll;
1172 }
1173 }
1174
1175 return frames_processed;
1176 }
1177
1178 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1179 {
1180 struct net_device *netdev = dev_instance;
1181 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1182 unsigned long lpar_rc;
1183
1184 if (napi_schedule_prep(&adapter->napi)) {
1185 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1186 VIO_IRQ_DISABLE);
1187 ibmveth_assert(lpar_rc == H_SUCCESS);
1188 __napi_schedule(&adapter->napi);
1189 }
1190 return IRQ_HANDLED;
1191 }
1192
1193 static void ibmveth_set_multicast_list(struct net_device *netdev)
1194 {
1195 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1196 unsigned long lpar_rc;
1197
1198 if ((netdev->flags & IFF_PROMISC) ||
1199 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
1200 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1201 IbmVethMcastEnableRecv |
1202 IbmVethMcastDisableFiltering,
1203 0);
1204 if(lpar_rc != H_SUCCESS) {
1205 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1206 }
1207 } else {
1208 struct netdev_hw_addr *ha;
1209 /* clear the filter table & disable filtering */
1210 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1211 IbmVethMcastEnableRecv |
1212 IbmVethMcastDisableFiltering |
1213 IbmVethMcastClearFilterTable,
1214 0);
1215 if(lpar_rc != H_SUCCESS) {
1216 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1217 }
1218 /* add the addresses to the filter table */
1219 netdev_for_each_mc_addr(ha, netdev) {
1220 // add the multicast address to the filter table
1221 unsigned long mcast_addr = 0;
1222 memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
1223 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1224 IbmVethMcastAddFilter,
1225 mcast_addr);
1226 if(lpar_rc != H_SUCCESS) {
1227 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1228 }
1229 }
1230
1231 /* re-enable filtering */
1232 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1233 IbmVethMcastEnableFiltering,
1234 0);
1235 if(lpar_rc != H_SUCCESS) {
1236 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1237 }
1238 }
1239 }
1240
1241 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1242 {
1243 struct ibmveth_adapter *adapter = netdev_priv(dev);
1244 struct vio_dev *viodev = adapter->vdev;
1245 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1246 int i, rc;
1247 int need_restart = 0;
1248
1249 if (new_mtu < IBMVETH_MAX_MTU)
1250 return -EINVAL;
1251
1252 for (i = 0; i < IbmVethNumBufferPools; i++)
1253 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1254 break;
1255
1256 if (i == IbmVethNumBufferPools)
1257 return -EINVAL;
1258
1259 /* Deactivate all the buffer pools so that the next loop can activate
1260 only the buffer pools necessary to hold the new MTU */
1261 if (netif_running(adapter->netdev)) {
1262 need_restart = 1;
1263 adapter->pool_config = 1;
1264 ibmveth_close(adapter->netdev);
1265 adapter->pool_config = 0;
1266 }
1267
1268 /* Look for an active buffer pool that can hold the new MTU */
1269 for(i = 0; i<IbmVethNumBufferPools; i++) {
1270 adapter->rx_buff_pool[i].active = 1;
1271
1272 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1273 dev->mtu = new_mtu;
1274 vio_cmo_set_dev_desired(viodev,
1275 ibmveth_get_desired_dma
1276 (viodev));
1277 if (need_restart) {
1278 return ibmveth_open(adapter->netdev);
1279 }
1280 return 0;
1281 }
1282 }
1283
1284 if (need_restart && (rc = ibmveth_open(adapter->netdev)))
1285 return rc;
1286
1287 return -EINVAL;
1288 }
1289
1290 #ifdef CONFIG_NET_POLL_CONTROLLER
1291 static void ibmveth_poll_controller(struct net_device *dev)
1292 {
1293 ibmveth_replenish_task(netdev_priv(dev));
1294 ibmveth_interrupt(dev->irq, dev);
1295 }
1296 #endif
1297
1298 /**
1299 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1300 *
1301 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1302 *
1303 * Return value:
1304 * Number of bytes of IO data the driver will need to perform well.
1305 */
1306 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1307 {
1308 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1309 struct ibmveth_adapter *adapter;
1310 unsigned long ret;
1311 int i;
1312 int rxqentries = 1;
1313
1314 /* netdev inits at probe time along with the structures we need below*/
1315 if (netdev == NULL)
1316 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1317
1318 adapter = netdev_priv(netdev);
1319
1320 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1321 ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1322
1323 for (i = 0; i < IbmVethNumBufferPools; i++) {
1324 /* add the size of the active receive buffers */
1325 if (adapter->rx_buff_pool[i].active)
1326 ret +=
1327 adapter->rx_buff_pool[i].size *
1328 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1329 buff_size);
1330 rxqentries += adapter->rx_buff_pool[i].size;
1331 }
1332 /* add the size of the receive queue entries */
1333 ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1334
1335 return ret;
1336 }
1337
1338 static const struct net_device_ops ibmveth_netdev_ops = {
1339 .ndo_open = ibmveth_open,
1340 .ndo_stop = ibmveth_close,
1341 .ndo_start_xmit = ibmveth_start_xmit,
1342 .ndo_set_multicast_list = ibmveth_set_multicast_list,
1343 .ndo_do_ioctl = ibmveth_ioctl,
1344 .ndo_change_mtu = ibmveth_change_mtu,
1345 .ndo_validate_addr = eth_validate_addr,
1346 .ndo_set_mac_address = eth_mac_addr,
1347 #ifdef CONFIG_NET_POLL_CONTROLLER
1348 .ndo_poll_controller = ibmveth_poll_controller,
1349 #endif
1350 };
1351
1352 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1353 {
1354 int rc, i;
1355 struct net_device *netdev;
1356 struct ibmveth_adapter *adapter;
1357
1358 unsigned char *mac_addr_p;
1359 unsigned int *mcastFilterSize_p;
1360
1361
1362 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1363 dev->unit_address);
1364
1365 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1366 VETH_MAC_ADDR, NULL);
1367 if(!mac_addr_p) {
1368 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1369 "attribute\n", __FILE__, __LINE__);
1370 return 0;
1371 }
1372
1373 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1374 VETH_MCAST_FILTER_SIZE, NULL);
1375 if(!mcastFilterSize_p) {
1376 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1377 "VETH_MCAST_FILTER_SIZE attribute\n",
1378 __FILE__, __LINE__);
1379 return 0;
1380 }
1381
1382 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1383
1384 if(!netdev)
1385 return -ENOMEM;
1386
1387 adapter = netdev_priv(netdev);
1388 dev_set_drvdata(&dev->dev, netdev);
1389
1390 adapter->vdev = dev;
1391 adapter->netdev = netdev;
1392 adapter->mcastFilterSize= *mcastFilterSize_p;
1393 adapter->pool_config = 0;
1394
1395 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1396
1397 /* Some older boxes running PHYP non-natively have an OF that
1398 returns a 8-byte local-mac-address field (and the first
1399 2 bytes have to be ignored) while newer boxes' OF return
1400 a 6-byte field. Note that IEEE 1275 specifies that
1401 local-mac-address must be a 6-byte field.
1402 The RPA doc specifies that the first byte must be 10b, so
1403 we'll just look for it to solve this 8 vs. 6 byte field issue */
1404
1405 if ((*mac_addr_p & 0x3) != 0x02)
1406 mac_addr_p += 2;
1407
1408 adapter->mac_addr = 0;
1409 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1410
1411 netdev->irq = dev->irq;
1412 netdev->netdev_ops = &ibmveth_netdev_ops;
1413 netdev->ethtool_ops = &netdev_ethtool_ops;
1414 SET_NETDEV_DEV(netdev, &dev->dev);
1415 netdev->features |= NETIF_F_SG;
1416
1417 memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1418
1419 for(i = 0; i<IbmVethNumBufferPools; i++) {
1420 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1421 int error;
1422
1423 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1424 pool_count[i], pool_size[i],
1425 pool_active[i]);
1426 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1427 &dev->dev.kobj, "pool%d", i);
1428 if (!error)
1429 kobject_uevent(kobj, KOBJ_ADD);
1430 }
1431
1432 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1433
1434 adapter->buffer_list_dma = DMA_ERROR_CODE;
1435 adapter->filter_list_dma = DMA_ERROR_CODE;
1436 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1437
1438 ibmveth_debug_printk("registering netdev...\n");
1439
1440 ibmveth_set_csum_offload(netdev, 1, ibmveth_set_tx_csum_flags);
1441
1442 rc = register_netdev(netdev);
1443
1444 if(rc) {
1445 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1446 free_netdev(netdev);
1447 return rc;
1448 }
1449
1450 ibmveth_debug_printk("registered\n");
1451
1452 return 0;
1453 }
1454
1455 static int __devexit ibmveth_remove(struct vio_dev *dev)
1456 {
1457 struct net_device *netdev = dev_get_drvdata(&dev->dev);
1458 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1459 int i;
1460
1461 for(i = 0; i<IbmVethNumBufferPools; i++)
1462 kobject_put(&adapter->rx_buff_pool[i].kobj);
1463
1464 unregister_netdev(netdev);
1465
1466 free_netdev(netdev);
1467 dev_set_drvdata(&dev->dev, NULL);
1468
1469 return 0;
1470 }
1471
1472 static struct attribute veth_active_attr;
1473 static struct attribute veth_num_attr;
1474 static struct attribute veth_size_attr;
1475
1476 static ssize_t veth_pool_show(struct kobject * kobj,
1477 struct attribute * attr, char * buf)
1478 {
1479 struct ibmveth_buff_pool *pool = container_of(kobj,
1480 struct ibmveth_buff_pool,
1481 kobj);
1482
1483 if (attr == &veth_active_attr)
1484 return sprintf(buf, "%d\n", pool->active);
1485 else if (attr == &veth_num_attr)
1486 return sprintf(buf, "%d\n", pool->size);
1487 else if (attr == &veth_size_attr)
1488 return sprintf(buf, "%d\n", pool->buff_size);
1489 return 0;
1490 }
1491
1492 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1493 const char * buf, size_t count)
1494 {
1495 struct ibmveth_buff_pool *pool = container_of(kobj,
1496 struct ibmveth_buff_pool,
1497 kobj);
1498 struct net_device *netdev = dev_get_drvdata(
1499 container_of(kobj->parent, struct device, kobj));
1500 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1501 long value = simple_strtol(buf, NULL, 10);
1502 long rc;
1503
1504 if (attr == &veth_active_attr) {
1505 if (value && !pool->active) {
1506 if (netif_running(netdev)) {
1507 if(ibmveth_alloc_buffer_pool(pool)) {
1508 ibmveth_error_printk("unable to alloc pool\n");
1509 return -ENOMEM;
1510 }
1511 pool->active = 1;
1512 adapter->pool_config = 1;
1513 ibmveth_close(netdev);
1514 adapter->pool_config = 0;
1515 if ((rc = ibmveth_open(netdev)))
1516 return rc;
1517 } else
1518 pool->active = 1;
1519 } else if (!value && pool->active) {
1520 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1521 int i;
1522 /* Make sure there is a buffer pool with buffers that
1523 can hold a packet of the size of the MTU */
1524 for (i = 0; i < IbmVethNumBufferPools; i++) {
1525 if (pool == &adapter->rx_buff_pool[i])
1526 continue;
1527 if (!adapter->rx_buff_pool[i].active)
1528 continue;
1529 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1530 break;
1531 }
1532
1533 if (i == IbmVethNumBufferPools) {
1534 ibmveth_error_printk("no active pool >= MTU\n");
1535 return -EPERM;
1536 }
1537
1538 if (netif_running(netdev)) {
1539 adapter->pool_config = 1;
1540 ibmveth_close(netdev);
1541 pool->active = 0;
1542 adapter->pool_config = 0;
1543 if ((rc = ibmveth_open(netdev)))
1544 return rc;
1545 }
1546 pool->active = 0;
1547 }
1548 } else if (attr == &veth_num_attr) {
1549 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1550 return -EINVAL;
1551 else {
1552 if (netif_running(netdev)) {
1553 adapter->pool_config = 1;
1554 ibmveth_close(netdev);
1555 adapter->pool_config = 0;
1556 pool->size = value;
1557 if ((rc = ibmveth_open(netdev)))
1558 return rc;
1559 } else
1560 pool->size = value;
1561 }
1562 } else if (attr == &veth_size_attr) {
1563 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1564 return -EINVAL;
1565 else {
1566 if (netif_running(netdev)) {
1567 adapter->pool_config = 1;
1568 ibmveth_close(netdev);
1569 adapter->pool_config = 0;
1570 pool->buff_size = value;
1571 if ((rc = ibmveth_open(netdev)))
1572 return rc;
1573 } else
1574 pool->buff_size = value;
1575 }
1576 }
1577
1578 /* kick the interrupt handler to allocate/deallocate pools */
1579 ibmveth_interrupt(netdev->irq, netdev);
1580 return count;
1581 }
1582
1583
1584 #define ATTR(_name, _mode) \
1585 struct attribute veth_##_name##_attr = { \
1586 .name = __stringify(_name), .mode = _mode, \
1587 };
1588
1589 static ATTR(active, 0644);
1590 static ATTR(num, 0644);
1591 static ATTR(size, 0644);
1592
1593 static struct attribute * veth_pool_attrs[] = {
1594 &veth_active_attr,
1595 &veth_num_attr,
1596 &veth_size_attr,
1597 NULL,
1598 };
1599
1600 static const struct sysfs_ops veth_pool_ops = {
1601 .show = veth_pool_show,
1602 .store = veth_pool_store,
1603 };
1604
1605 static struct kobj_type ktype_veth_pool = {
1606 .release = NULL,
1607 .sysfs_ops = &veth_pool_ops,
1608 .default_attrs = veth_pool_attrs,
1609 };
1610
1611 static int ibmveth_resume(struct device *dev)
1612 {
1613 struct net_device *netdev = dev_get_drvdata(dev);
1614 ibmveth_interrupt(netdev->irq, netdev);
1615 return 0;
1616 }
1617
1618 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1619 { "network", "IBM,l-lan"},
1620 { "", "" }
1621 };
1622 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1623
1624 static struct dev_pm_ops ibmveth_pm_ops = {
1625 .resume = ibmveth_resume
1626 };
1627
1628 static struct vio_driver ibmveth_driver = {
1629 .id_table = ibmveth_device_table,
1630 .probe = ibmveth_probe,
1631 .remove = ibmveth_remove,
1632 .get_desired_dma = ibmveth_get_desired_dma,
1633 .driver = {
1634 .name = ibmveth_driver_name,
1635 .owner = THIS_MODULE,
1636 .pm = &ibmveth_pm_ops,
1637 }
1638 };
1639
1640 static int __init ibmveth_module_init(void)
1641 {
1642 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1643
1644 return vio_register_driver(&ibmveth_driver);
1645 }
1646
1647 static void __exit ibmveth_module_exit(void)
1648 {
1649 vio_unregister_driver(&ibmveth_driver);
1650 }
1651
1652 module_init(ibmveth_module_init);
1653 module_exit(ibmveth_module_exit);
Linux kernel - Deliverables
This page took 0.072822 seconds and 5 git commands to generate.