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[mirror_ubuntu-artful-kernel.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/moduleparam.h>
37 #include <linux/types.h>
38 #include <linux/errno.h>
39 #include <linux/ioport.h>
40 #include <linux/dma-mapping.h>
41 #include <linux/kernel.h>
42 #include <linux/netdevice.h>
43 #include <linux/etherdevice.h>
44 #include <linux/skbuff.h>
45 #include <linux/init.h>
46 #include <linux/delay.h>
47 #include <linux/mm.h>
48 #include <linux/pm.h>
49 #include <linux/ethtool.h>
50 #include <linux/proc_fs.h>
51 #include <linux/in.h>
52 #include <linux/ip.h>
53 #include <linux/slab.h>
54 #include <net/net_namespace.h>
55 #include <asm/hvcall.h>
56 #include <asm/atomic.h>
57 #include <asm/vio.h>
58 #include <asm/iommu.h>
59 #include <asm/uaccess.h>
60 #include <asm/firmware.h>
61 #include <linux/seq_file.h>
62
63 #include "ibmveth.h"
64
65 #undef DEBUG
66
67 #define ibmveth_printk(fmt, args...) \
68 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
69
70 #define ibmveth_error_printk(fmt, args...) \
71 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
72
73 #ifdef DEBUG
74 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
75 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
76 #define ibmveth_debug_printk(fmt, args...) \
77 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
78 #define ibmveth_assert(expr) \
79 if(!(expr)) { \
80 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
81 BUG(); \
82 }
83 #else
84 #define ibmveth_debug_printk_no_adapter(fmt, args...)
85 #define ibmveth_debug_printk(fmt, args...)
86 #define ibmveth_assert(expr)
87 #endif
88
89 static int ibmveth_open(struct net_device *dev);
90 static int ibmveth_close(struct net_device *dev);
91 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
92 static int ibmveth_poll(struct napi_struct *napi, int budget);
93 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
94 static void ibmveth_set_multicast_list(struct net_device *dev);
95 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
96 static void ibmveth_proc_register_driver(void);
97 static void ibmveth_proc_unregister_driver(void);
98 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
99 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
100 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
101 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
102 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
103 static struct kobj_type ktype_veth_pool;
104
105
106 #ifdef CONFIG_PROC_FS
107 #define IBMVETH_PROC_DIR "ibmveth"
108 static struct proc_dir_entry *ibmveth_proc_dir;
109 #endif
110
111 static const char ibmveth_driver_name[] = "ibmveth";
112 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
113 #define ibmveth_driver_version "1.03"
114
115 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
116 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
117 MODULE_LICENSE("GPL");
118 MODULE_VERSION(ibmveth_driver_version);
119
120 struct ibmveth_stat {
121 char name[ETH_GSTRING_LEN];
122 int offset;
123 };
124
125 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
126 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
127
128 struct ibmveth_stat ibmveth_stats[] = {
129 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
130 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
131 { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
132 { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
133 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
134 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
135 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
136 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
137 };
138
139 /* simple methods of getting data from the current rxq entry */
140 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
141 {
142 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
143 }
144
145 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
146 {
147 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
148 }
149
150 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
151 {
152 return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
153 }
154
155 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
156 {
157 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
158 }
159
160 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
161 {
162 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
163 }
164
165 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
166 {
167 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
168 }
169
170 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
171 {
172 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
173 }
174
175 /* setup the initial settings for a buffer pool */
176 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
177 {
178 pool->size = pool_size;
179 pool->index = pool_index;
180 pool->buff_size = buff_size;
181 pool->threshold = pool_size / 2;
182 pool->active = pool_active;
183 }
184
185 /* allocate and setup an buffer pool - called during open */
186 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
187 {
188 int i;
189
190 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
191
192 if(!pool->free_map) {
193 return -1;
194 }
195
196 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
197 if(!pool->dma_addr) {
198 kfree(pool->free_map);
199 pool->free_map = NULL;
200 return -1;
201 }
202
203 pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
204
205 if(!pool->skbuff) {
206 kfree(pool->dma_addr);
207 pool->dma_addr = NULL;
208
209 kfree(pool->free_map);
210 pool->free_map = NULL;
211 return -1;
212 }
213
214 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
215
216 for(i = 0; i < pool->size; ++i) {
217 pool->free_map[i] = i;
218 }
219
220 atomic_set(&pool->available, 0);
221 pool->producer_index = 0;
222 pool->consumer_index = 0;
223
224 return 0;
225 }
226
227 /* replenish the buffers for a pool. note that we don't need to
228 * skb_reserve these since they are used for incoming...
229 */
230 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
231 {
232 u32 i;
233 u32 count = pool->size - atomic_read(&pool->available);
234 u32 buffers_added = 0;
235 struct sk_buff *skb;
236 unsigned int free_index, index;
237 u64 correlator;
238 unsigned long lpar_rc;
239 dma_addr_t dma_addr;
240
241 mb();
242
243 for(i = 0; i < count; ++i) {
244 union ibmveth_buf_desc desc;
245
246 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
247
248 if(!skb) {
249 ibmveth_debug_printk("replenish: unable to allocate skb\n");
250 adapter->replenish_no_mem++;
251 break;
252 }
253
254 free_index = pool->consumer_index;
255 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
256 index = pool->free_map[free_index];
257
258 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
259 ibmveth_assert(pool->skbuff[index] == NULL);
260
261 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
262 pool->buff_size, DMA_FROM_DEVICE);
263
264 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
265 goto failure;
266
267 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
268 pool->dma_addr[index] = dma_addr;
269 pool->skbuff[index] = skb;
270
271 correlator = ((u64)pool->index << 32) | index;
272 *(u64*)skb->data = correlator;
273
274 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
275 desc.fields.address = dma_addr;
276
277 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
278
279 if (lpar_rc != H_SUCCESS)
280 goto failure;
281 else {
282 buffers_added++;
283 adapter->replenish_add_buff_success++;
284 }
285 }
286
287 mb();
288 atomic_add(buffers_added, &(pool->available));
289 return;
290
291 failure:
292 pool->free_map[free_index] = index;
293 pool->skbuff[index] = NULL;
294 if (pool->consumer_index == 0)
295 pool->consumer_index = pool->size - 1;
296 else
297 pool->consumer_index--;
298 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
299 dma_unmap_single(&adapter->vdev->dev,
300 pool->dma_addr[index], pool->buff_size,
301 DMA_FROM_DEVICE);
302 dev_kfree_skb_any(skb);
303 adapter->replenish_add_buff_failure++;
304
305 mb();
306 atomic_add(buffers_added, &(pool->available));
307 }
308
309 /* replenish routine */
310 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
311 {
312 int i;
313
314 adapter->replenish_task_cycles++;
315
316 for (i = (IbmVethNumBufferPools - 1); i >= 0; i--)
317 if(adapter->rx_buff_pool[i].active)
318 ibmveth_replenish_buffer_pool(adapter,
319 &adapter->rx_buff_pool[i]);
320
321 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
322 }
323
324 /* empty and free ana buffer pool - also used to do cleanup in error paths */
325 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
326 {
327 int i;
328
329 kfree(pool->free_map);
330 pool->free_map = NULL;
331
332 if(pool->skbuff && pool->dma_addr) {
333 for(i = 0; i < pool->size; ++i) {
334 struct sk_buff *skb = pool->skbuff[i];
335 if(skb) {
336 dma_unmap_single(&adapter->vdev->dev,
337 pool->dma_addr[i],
338 pool->buff_size,
339 DMA_FROM_DEVICE);
340 dev_kfree_skb_any(skb);
341 pool->skbuff[i] = NULL;
342 }
343 }
344 }
345
346 if(pool->dma_addr) {
347 kfree(pool->dma_addr);
348 pool->dma_addr = NULL;
349 }
350
351 if(pool->skbuff) {
352 kfree(pool->skbuff);
353 pool->skbuff = NULL;
354 }
355 }
356
357 /* remove a buffer from a pool */
358 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
359 {
360 unsigned int pool = correlator >> 32;
361 unsigned int index = correlator & 0xffffffffUL;
362 unsigned int free_index;
363 struct sk_buff *skb;
364
365 ibmveth_assert(pool < IbmVethNumBufferPools);
366 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
367
368 skb = adapter->rx_buff_pool[pool].skbuff[index];
369
370 ibmveth_assert(skb != NULL);
371
372 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
373
374 dma_unmap_single(&adapter->vdev->dev,
375 adapter->rx_buff_pool[pool].dma_addr[index],
376 adapter->rx_buff_pool[pool].buff_size,
377 DMA_FROM_DEVICE);
378
379 free_index = adapter->rx_buff_pool[pool].producer_index;
380 adapter->rx_buff_pool[pool].producer_index
381 = (adapter->rx_buff_pool[pool].producer_index + 1)
382 % adapter->rx_buff_pool[pool].size;
383 adapter->rx_buff_pool[pool].free_map[free_index] = index;
384
385 mb();
386
387 atomic_dec(&(adapter->rx_buff_pool[pool].available));
388 }
389
390 /* get the current buffer on the rx queue */
391 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
392 {
393 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
394 unsigned int pool = correlator >> 32;
395 unsigned int index = correlator & 0xffffffffUL;
396
397 ibmveth_assert(pool < IbmVethNumBufferPools);
398 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
399
400 return adapter->rx_buff_pool[pool].skbuff[index];
401 }
402
403 /* recycle the current buffer on the rx queue */
404 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
405 {
406 u32 q_index = adapter->rx_queue.index;
407 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
408 unsigned int pool = correlator >> 32;
409 unsigned int index = correlator & 0xffffffffUL;
410 union ibmveth_buf_desc desc;
411 unsigned long lpar_rc;
412
413 ibmveth_assert(pool < IbmVethNumBufferPools);
414 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
415
416 if(!adapter->rx_buff_pool[pool].active) {
417 ibmveth_rxq_harvest_buffer(adapter);
418 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
419 return;
420 }
421
422 desc.fields.flags_len = IBMVETH_BUF_VALID |
423 adapter->rx_buff_pool[pool].buff_size;
424 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
425
426 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
427
428 if(lpar_rc != H_SUCCESS) {
429 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
430 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
431 }
432
433 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
434 adapter->rx_queue.index = 0;
435 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
436 }
437 }
438
439 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
440 {
441 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
442
443 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
444 adapter->rx_queue.index = 0;
445 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
446 }
447 }
448
449 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
450 {
451 int i;
452 struct device *dev = &adapter->vdev->dev;
453
454 if(adapter->buffer_list_addr != NULL) {
455 if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
456 dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
457 DMA_BIDIRECTIONAL);
458 adapter->buffer_list_dma = DMA_ERROR_CODE;
459 }
460 free_page((unsigned long)adapter->buffer_list_addr);
461 adapter->buffer_list_addr = NULL;
462 }
463
464 if(adapter->filter_list_addr != NULL) {
465 if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
466 dma_unmap_single(dev, adapter->filter_list_dma, 4096,
467 DMA_BIDIRECTIONAL);
468 adapter->filter_list_dma = DMA_ERROR_CODE;
469 }
470 free_page((unsigned long)adapter->filter_list_addr);
471 adapter->filter_list_addr = NULL;
472 }
473
474 if(adapter->rx_queue.queue_addr != NULL) {
475 if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
476 dma_unmap_single(dev,
477 adapter->rx_queue.queue_dma,
478 adapter->rx_queue.queue_len,
479 DMA_BIDIRECTIONAL);
480 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
481 }
482 kfree(adapter->rx_queue.queue_addr);
483 adapter->rx_queue.queue_addr = NULL;
484 }
485
486 for(i = 0; i<IbmVethNumBufferPools; i++)
487 if (adapter->rx_buff_pool[i].active)
488 ibmveth_free_buffer_pool(adapter,
489 &adapter->rx_buff_pool[i]);
490
491 if (adapter->bounce_buffer != NULL) {
492 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
493 dma_unmap_single(&adapter->vdev->dev,
494 adapter->bounce_buffer_dma,
495 adapter->netdev->mtu + IBMVETH_BUFF_OH,
496 DMA_BIDIRECTIONAL);
497 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
498 }
499 kfree(adapter->bounce_buffer);
500 adapter->bounce_buffer = NULL;
501 }
502 }
503
504 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
505 union ibmveth_buf_desc rxq_desc, u64 mac_address)
506 {
507 int rc, try_again = 1;
508
509 /* After a kexec the adapter will still be open, so our attempt to
510 * open it will fail. So if we get a failure we free the adapter and
511 * try again, but only once. */
512 retry:
513 rc = h_register_logical_lan(adapter->vdev->unit_address,
514 adapter->buffer_list_dma, rxq_desc.desc,
515 adapter->filter_list_dma, mac_address);
516
517 if (rc != H_SUCCESS && try_again) {
518 do {
519 rc = h_free_logical_lan(adapter->vdev->unit_address);
520 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
521
522 try_again = 0;
523 goto retry;
524 }
525
526 return rc;
527 }
528
529 static int ibmveth_open(struct net_device *netdev)
530 {
531 struct ibmveth_adapter *adapter = netdev_priv(netdev);
532 u64 mac_address = 0;
533 int rxq_entries = 1;
534 unsigned long lpar_rc;
535 int rc;
536 union ibmveth_buf_desc rxq_desc;
537 int i;
538 struct device *dev;
539
540 ibmveth_debug_printk("open starting\n");
541
542 napi_enable(&adapter->napi);
543
544 for(i = 0; i<IbmVethNumBufferPools; i++)
545 rxq_entries += adapter->rx_buff_pool[i].size;
546
547 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
548 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
549
550 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
551 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
552 ibmveth_cleanup(adapter);
553 napi_disable(&adapter->napi);
554 return -ENOMEM;
555 }
556
557 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
558 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
559
560 if(!adapter->rx_queue.queue_addr) {
561 ibmveth_error_printk("unable to allocate rx queue pages\n");
562 ibmveth_cleanup(adapter);
563 napi_disable(&adapter->napi);
564 return -ENOMEM;
565 }
566
567 dev = &adapter->vdev->dev;
568
569 adapter->buffer_list_dma = dma_map_single(dev,
570 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
571 adapter->filter_list_dma = dma_map_single(dev,
572 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
573 adapter->rx_queue.queue_dma = dma_map_single(dev,
574 adapter->rx_queue.queue_addr,
575 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
576
577 if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
578 (dma_mapping_error(dev, adapter->filter_list_dma)) ||
579 (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
580 ibmveth_error_printk("unable to map filter or buffer list pages\n");
581 ibmveth_cleanup(adapter);
582 napi_disable(&adapter->napi);
583 return -ENOMEM;
584 }
585
586 adapter->rx_queue.index = 0;
587 adapter->rx_queue.num_slots = rxq_entries;
588 adapter->rx_queue.toggle = 1;
589
590 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
591 mac_address = mac_address >> 16;
592
593 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
594 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
595
596 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
597 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
598 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
599
600 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
601
602 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
603
604 if(lpar_rc != H_SUCCESS) {
605 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
606 ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n",
607 adapter->buffer_list_dma,
608 adapter->filter_list_dma,
609 rxq_desc.desc,
610 mac_address);
611 ibmveth_cleanup(adapter);
612 napi_disable(&adapter->napi);
613 return -ENONET;
614 }
615
616 for(i = 0; i<IbmVethNumBufferPools; i++) {
617 if(!adapter->rx_buff_pool[i].active)
618 continue;
619 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
620 ibmveth_error_printk("unable to alloc pool\n");
621 adapter->rx_buff_pool[i].active = 0;
622 ibmveth_cleanup(adapter);
623 napi_disable(&adapter->napi);
624 return -ENOMEM ;
625 }
626 }
627
628 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
629 if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
630 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
631 do {
632 rc = h_free_logical_lan(adapter->vdev->unit_address);
633 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
634
635 ibmveth_cleanup(adapter);
636 napi_disable(&adapter->napi);
637 return rc;
638 }
639
640 adapter->bounce_buffer =
641 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
642 if (!adapter->bounce_buffer) {
643 ibmveth_error_printk("unable to allocate bounce buffer\n");
644 ibmveth_cleanup(adapter);
645 napi_disable(&adapter->napi);
646 return -ENOMEM;
647 }
648 adapter->bounce_buffer_dma =
649 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
650 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
651 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
652 ibmveth_error_printk("unable to map bounce buffer\n");
653 ibmveth_cleanup(adapter);
654 napi_disable(&adapter->napi);
655 return -ENOMEM;
656 }
657
658 ibmveth_debug_printk("initial replenish cycle\n");
659 ibmveth_interrupt(netdev->irq, netdev);
660
661 netif_start_queue(netdev);
662
663 ibmveth_debug_printk("open complete\n");
664
665 return 0;
666 }
667
668 static int ibmveth_close(struct net_device *netdev)
669 {
670 struct ibmveth_adapter *adapter = netdev_priv(netdev);
671 long lpar_rc;
672
673 ibmveth_debug_printk("close starting\n");
674
675 napi_disable(&adapter->napi);
676
677 if (!adapter->pool_config)
678 netif_stop_queue(netdev);
679
680 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
681
682 do {
683 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
684 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
685
686 if(lpar_rc != H_SUCCESS)
687 {
688 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
689 lpar_rc);
690 }
691
692 free_irq(netdev->irq, netdev);
693
694 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
695
696 ibmveth_cleanup(adapter);
697
698 ibmveth_debug_printk("close complete\n");
699
700 return 0;
701 }
702
703 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
704 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
705 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
706 cmd->speed = SPEED_1000;
707 cmd->duplex = DUPLEX_FULL;
708 cmd->port = PORT_FIBRE;
709 cmd->phy_address = 0;
710 cmd->transceiver = XCVR_INTERNAL;
711 cmd->autoneg = AUTONEG_ENABLE;
712 cmd->maxtxpkt = 0;
713 cmd->maxrxpkt = 1;
714 return 0;
715 }
716
717 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
718 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
719 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
720 }
721
722 static u32 netdev_get_link(struct net_device *dev) {
723 return 1;
724 }
725
726 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
727 {
728 struct ibmveth_adapter *adapter = netdev_priv(dev);
729
730 if (data)
731 adapter->rx_csum = 1;
732 else {
733 /*
734 * Since the ibmveth firmware interface does not have the concept of
735 * separate tx/rx checksum offload enable, if rx checksum is disabled
736 * we also have to disable tx checksum offload. Once we disable rx
737 * checksum offload, we are no longer allowed to send tx buffers that
738 * are not properly checksummed.
739 */
740 adapter->rx_csum = 0;
741 dev->features &= ~NETIF_F_IP_CSUM;
742 }
743 }
744
745 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
746 {
747 struct ibmveth_adapter *adapter = netdev_priv(dev);
748
749 if (data) {
750 dev->features |= NETIF_F_IP_CSUM;
751 adapter->rx_csum = 1;
752 } else
753 dev->features &= ~NETIF_F_IP_CSUM;
754 }
755
756 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
757 void (*done) (struct net_device *, u32))
758 {
759 struct ibmveth_adapter *adapter = netdev_priv(dev);
760 unsigned long set_attr, clr_attr, ret_attr;
761 long ret;
762 int rc1 = 0, rc2 = 0;
763 int restart = 0;
764
765 if (netif_running(dev)) {
766 restart = 1;
767 adapter->pool_config = 1;
768 ibmveth_close(dev);
769 adapter->pool_config = 0;
770 }
771
772 set_attr = 0;
773 clr_attr = 0;
774
775 if (data)
776 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
777 else
778 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
779
780 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
781
782 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
783 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
784 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
785 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
786 set_attr, &ret_attr);
787
788 if (ret != H_SUCCESS) {
789 rc1 = -EIO;
790 ibmveth_error_printk("unable to change checksum offload settings."
791 " %d rc=%ld\n", data, ret);
792
793 ret = h_illan_attributes(adapter->vdev->unit_address,
794 set_attr, clr_attr, &ret_attr);
795 } else
796 done(dev, data);
797 } else {
798 rc1 = -EIO;
799 ibmveth_error_printk("unable to change checksum offload settings."
800 " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
801 }
802
803 if (restart)
804 rc2 = ibmveth_open(dev);
805
806 return rc1 ? rc1 : rc2;
807 }
808
809 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
810 {
811 struct ibmveth_adapter *adapter = netdev_priv(dev);
812
813 if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
814 return 0;
815
816 return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
817 }
818
819 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
820 {
821 struct ibmveth_adapter *adapter = netdev_priv(dev);
822 int rc = 0;
823
824 if (data && (dev->features & NETIF_F_IP_CSUM))
825 return 0;
826 if (!data && !(dev->features & NETIF_F_IP_CSUM))
827 return 0;
828
829 if (data && !adapter->rx_csum)
830 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
831 else
832 ibmveth_set_tx_csum_flags(dev, data);
833
834 return rc;
835 }
836
837 static u32 ibmveth_get_rx_csum(struct net_device *dev)
838 {
839 struct ibmveth_adapter *adapter = netdev_priv(dev);
840 return adapter->rx_csum;
841 }
842
843 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
844 {
845 int i;
846
847 if (stringset != ETH_SS_STATS)
848 return;
849
850 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
851 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
852 }
853
854 static int ibmveth_get_sset_count(struct net_device *dev, int sset)
855 {
856 switch (sset) {
857 case ETH_SS_STATS:
858 return ARRAY_SIZE(ibmveth_stats);
859 default:
860 return -EOPNOTSUPP;
861 }
862 }
863
864 static void ibmveth_get_ethtool_stats(struct net_device *dev,
865 struct ethtool_stats *stats, u64 *data)
866 {
867 int i;
868 struct ibmveth_adapter *adapter = netdev_priv(dev);
869
870 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
871 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
872 }
873
874 static const struct ethtool_ops netdev_ethtool_ops = {
875 .get_drvinfo = netdev_get_drvinfo,
876 .get_settings = netdev_get_settings,
877 .get_link = netdev_get_link,
878 .set_tx_csum = ibmveth_set_tx_csum,
879 .get_rx_csum = ibmveth_get_rx_csum,
880 .set_rx_csum = ibmveth_set_rx_csum,
881 .get_strings = ibmveth_get_strings,
882 .get_sset_count = ibmveth_get_sset_count,
883 .get_ethtool_stats = ibmveth_get_ethtool_stats,
884 };
885
886 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
887 {
888 return -EOPNOTSUPP;
889 }
890
891 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
892
893 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
894 struct net_device *netdev)
895 {
896 struct ibmveth_adapter *adapter = netdev_priv(netdev);
897 union ibmveth_buf_desc desc;
898 unsigned long lpar_rc;
899 unsigned long correlator;
900 unsigned long flags;
901 unsigned int retry_count;
902 unsigned int tx_dropped = 0;
903 unsigned int tx_bytes = 0;
904 unsigned int tx_packets = 0;
905 unsigned int tx_send_failed = 0;
906 unsigned int tx_map_failed = 0;
907 int used_bounce = 0;
908 unsigned long data_dma_addr;
909
910 desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
911
912 if (skb->ip_summed == CHECKSUM_PARTIAL &&
913 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
914 ibmveth_error_printk("tx: failed to checksum packet\n");
915 tx_dropped++;
916 goto out;
917 }
918
919 if (skb->ip_summed == CHECKSUM_PARTIAL) {
920 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
921
922 desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
923
924 /* Need to zero out the checksum */
925 buf[0] = 0;
926 buf[1] = 0;
927 }
928
929 data_dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
930 skb->len, DMA_TO_DEVICE);
931 if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) {
932 if (!firmware_has_feature(FW_FEATURE_CMO))
933 ibmveth_error_printk("tx: unable to map xmit buffer\n");
934 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
935 skb->len);
936 desc.fields.address = adapter->bounce_buffer_dma;
937 tx_map_failed++;
938 used_bounce = 1;
939 wmb();
940 } else
941 desc.fields.address = data_dma_addr;
942
943 /* send the frame. Arbitrarily set retrycount to 1024 */
944 correlator = 0;
945 retry_count = 1024;
946 do {
947 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
948 desc.desc, 0, 0, 0, 0, 0,
949 correlator, &correlator);
950 } while ((lpar_rc == H_BUSY) && (retry_count--));
951
952 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
953 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
954 ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
955 (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
956 skb->len, desc.fields.address);
957 tx_send_failed++;
958 tx_dropped++;
959 } else {
960 tx_packets++;
961 tx_bytes += skb->len;
962 netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
963 }
964
965 if (!used_bounce)
966 dma_unmap_single(&adapter->vdev->dev, data_dma_addr,
967 skb->len, DMA_TO_DEVICE);
968
969 out: spin_lock_irqsave(&adapter->stats_lock, flags);
970 netdev->stats.tx_dropped += tx_dropped;
971 netdev->stats.tx_bytes += tx_bytes;
972 netdev->stats.tx_packets += tx_packets;
973 adapter->tx_send_failed += tx_send_failed;
974 adapter->tx_map_failed += tx_map_failed;
975 spin_unlock_irqrestore(&adapter->stats_lock, flags);
976
977 dev_kfree_skb(skb);
978 return NETDEV_TX_OK;
979 }
980
981 static int ibmveth_poll(struct napi_struct *napi, int budget)
982 {
983 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
984 struct net_device *netdev = adapter->netdev;
985 int frames_processed = 0;
986 unsigned long lpar_rc;
987
988 restart_poll:
989 do {
990 struct sk_buff *skb;
991
992 if (!ibmveth_rxq_pending_buffer(adapter))
993 break;
994
995 rmb();
996 if (!ibmveth_rxq_buffer_valid(adapter)) {
997 wmb(); /* suggested by larson1 */
998 adapter->rx_invalid_buffer++;
999 ibmveth_debug_printk("recycling invalid buffer\n");
1000 ibmveth_rxq_recycle_buffer(adapter);
1001 } else {
1002 int length = ibmveth_rxq_frame_length(adapter);
1003 int offset = ibmveth_rxq_frame_offset(adapter);
1004 int csum_good = ibmveth_rxq_csum_good(adapter);
1005
1006 skb = ibmveth_rxq_get_buffer(adapter);
1007 if (csum_good)
1008 skb->ip_summed = CHECKSUM_UNNECESSARY;
1009
1010 ibmveth_rxq_harvest_buffer(adapter);
1011
1012 skb_reserve(skb, offset);
1013 skb_put(skb, length);
1014 skb->protocol = eth_type_trans(skb, netdev);
1015
1016 netif_receive_skb(skb); /* send it up */
1017
1018 netdev->stats.rx_packets++;
1019 netdev->stats.rx_bytes += length;
1020 frames_processed++;
1021 }
1022 } while (frames_processed < budget);
1023
1024 ibmveth_replenish_task(adapter);
1025
1026 if (frames_processed < budget) {
1027 /* We think we are done - reenable interrupts,
1028 * then check once more to make sure we are done.
1029 */
1030 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1031 VIO_IRQ_ENABLE);
1032
1033 ibmveth_assert(lpar_rc == H_SUCCESS);
1034
1035 napi_complete(napi);
1036
1037 if (ibmveth_rxq_pending_buffer(adapter) &&
1038 napi_reschedule(napi)) {
1039 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1040 VIO_IRQ_DISABLE);
1041 goto restart_poll;
1042 }
1043 }
1044
1045 return frames_processed;
1046 }
1047
1048 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1049 {
1050 struct net_device *netdev = dev_instance;
1051 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1052 unsigned long lpar_rc;
1053
1054 if (napi_schedule_prep(&adapter->napi)) {
1055 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1056 VIO_IRQ_DISABLE);
1057 ibmveth_assert(lpar_rc == H_SUCCESS);
1058 __napi_schedule(&adapter->napi);
1059 }
1060 return IRQ_HANDLED;
1061 }
1062
1063 static void ibmveth_set_multicast_list(struct net_device *netdev)
1064 {
1065 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1066 unsigned long lpar_rc;
1067
1068 if ((netdev->flags & IFF_PROMISC) ||
1069 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
1070 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1071 IbmVethMcastEnableRecv |
1072 IbmVethMcastDisableFiltering,
1073 0);
1074 if(lpar_rc != H_SUCCESS) {
1075 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1076 }
1077 } else {
1078 struct netdev_hw_addr *ha;
1079 /* clear the filter table & disable filtering */
1080 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1081 IbmVethMcastEnableRecv |
1082 IbmVethMcastDisableFiltering |
1083 IbmVethMcastClearFilterTable,
1084 0);
1085 if(lpar_rc != H_SUCCESS) {
1086 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1087 }
1088 /* add the addresses to the filter table */
1089 netdev_for_each_mc_addr(ha, netdev) {
1090 // add the multicast address to the filter table
1091 unsigned long mcast_addr = 0;
1092 memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
1093 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1094 IbmVethMcastAddFilter,
1095 mcast_addr);
1096 if(lpar_rc != H_SUCCESS) {
1097 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1098 }
1099 }
1100
1101 /* re-enable filtering */
1102 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1103 IbmVethMcastEnableFiltering,
1104 0);
1105 if(lpar_rc != H_SUCCESS) {
1106 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1107 }
1108 }
1109 }
1110
1111 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1112 {
1113 struct ibmveth_adapter *adapter = netdev_priv(dev);
1114 struct vio_dev *viodev = adapter->vdev;
1115 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1116 int i, rc;
1117 int need_restart = 0;
1118
1119 if (new_mtu < IBMVETH_MAX_MTU)
1120 return -EINVAL;
1121
1122 for (i = 0; i < IbmVethNumBufferPools; i++)
1123 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1124 break;
1125
1126 if (i == IbmVethNumBufferPools)
1127 return -EINVAL;
1128
1129 /* Deactivate all the buffer pools so that the next loop can activate
1130 only the buffer pools necessary to hold the new MTU */
1131 if (netif_running(adapter->netdev)) {
1132 need_restart = 1;
1133 adapter->pool_config = 1;
1134 ibmveth_close(adapter->netdev);
1135 adapter->pool_config = 0;
1136 }
1137
1138 /* Look for an active buffer pool that can hold the new MTU */
1139 for(i = 0; i<IbmVethNumBufferPools; i++) {
1140 adapter->rx_buff_pool[i].active = 1;
1141
1142 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1143 dev->mtu = new_mtu;
1144 vio_cmo_set_dev_desired(viodev,
1145 ibmveth_get_desired_dma
1146 (viodev));
1147 if (need_restart) {
1148 return ibmveth_open(adapter->netdev);
1149 }
1150 return 0;
1151 }
1152 }
1153
1154 if (need_restart && (rc = ibmveth_open(adapter->netdev)))
1155 return rc;
1156
1157 return -EINVAL;
1158 }
1159
1160 #ifdef CONFIG_NET_POLL_CONTROLLER
1161 static void ibmveth_poll_controller(struct net_device *dev)
1162 {
1163 ibmveth_replenish_task(netdev_priv(dev));
1164 ibmveth_interrupt(dev->irq, dev);
1165 }
1166 #endif
1167
1168 /**
1169 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1170 *
1171 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1172 *
1173 * Return value:
1174 * Number of bytes of IO data the driver will need to perform well.
1175 */
1176 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1177 {
1178 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1179 struct ibmveth_adapter *adapter;
1180 unsigned long ret;
1181 int i;
1182 int rxqentries = 1;
1183
1184 /* netdev inits at probe time along with the structures we need below*/
1185 if (netdev == NULL)
1186 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1187
1188 adapter = netdev_priv(netdev);
1189
1190 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1191 ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1192
1193 for (i = 0; i < IbmVethNumBufferPools; i++) {
1194 /* add the size of the active receive buffers */
1195 if (adapter->rx_buff_pool[i].active)
1196 ret +=
1197 adapter->rx_buff_pool[i].size *
1198 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1199 buff_size);
1200 rxqentries += adapter->rx_buff_pool[i].size;
1201 }
1202 /* add the size of the receive queue entries */
1203 ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1204
1205 return ret;
1206 }
1207
1208 static const struct net_device_ops ibmveth_netdev_ops = {
1209 .ndo_open = ibmveth_open,
1210 .ndo_stop = ibmveth_close,
1211 .ndo_start_xmit = ibmveth_start_xmit,
1212 .ndo_set_multicast_list = ibmveth_set_multicast_list,
1213 .ndo_do_ioctl = ibmveth_ioctl,
1214 .ndo_change_mtu = ibmveth_change_mtu,
1215 .ndo_validate_addr = eth_validate_addr,
1216 .ndo_set_mac_address = eth_mac_addr,
1217 #ifdef CONFIG_NET_POLL_CONTROLLER
1218 .ndo_poll_controller = ibmveth_poll_controller,
1219 #endif
1220 };
1221
1222 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1223 {
1224 int rc, i;
1225 long ret;
1226 struct net_device *netdev;
1227 struct ibmveth_adapter *adapter;
1228 unsigned long set_attr, ret_attr;
1229
1230 unsigned char *mac_addr_p;
1231 unsigned int *mcastFilterSize_p;
1232
1233
1234 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1235 dev->unit_address);
1236
1237 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1238 VETH_MAC_ADDR, NULL);
1239 if(!mac_addr_p) {
1240 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1241 "attribute\n", __FILE__, __LINE__);
1242 return 0;
1243 }
1244
1245 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1246 VETH_MCAST_FILTER_SIZE, NULL);
1247 if(!mcastFilterSize_p) {
1248 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1249 "VETH_MCAST_FILTER_SIZE attribute\n",
1250 __FILE__, __LINE__);
1251 return 0;
1252 }
1253
1254 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1255
1256 if(!netdev)
1257 return -ENOMEM;
1258
1259 adapter = netdev_priv(netdev);
1260 dev_set_drvdata(&dev->dev, netdev);
1261
1262 adapter->vdev = dev;
1263 adapter->netdev = netdev;
1264 adapter->mcastFilterSize= *mcastFilterSize_p;
1265 adapter->pool_config = 0;
1266
1267 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1268
1269 /* Some older boxes running PHYP non-natively have an OF that
1270 returns a 8-byte local-mac-address field (and the first
1271 2 bytes have to be ignored) while newer boxes' OF return
1272 a 6-byte field. Note that IEEE 1275 specifies that
1273 local-mac-address must be a 6-byte field.
1274 The RPA doc specifies that the first byte must be 10b, so
1275 we'll just look for it to solve this 8 vs. 6 byte field issue */
1276
1277 if ((*mac_addr_p & 0x3) != 0x02)
1278 mac_addr_p += 2;
1279
1280 adapter->mac_addr = 0;
1281 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1282
1283 netdev->irq = dev->irq;
1284 netdev->netdev_ops = &ibmveth_netdev_ops;
1285 netdev->ethtool_ops = &netdev_ethtool_ops;
1286 SET_NETDEV_DEV(netdev, &dev->dev);
1287 netdev->features |= NETIF_F_LLTX;
1288 spin_lock_init(&adapter->stats_lock);
1289
1290 memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1291
1292 for(i = 0; i<IbmVethNumBufferPools; i++) {
1293 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1294 int error;
1295
1296 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1297 pool_count[i], pool_size[i],
1298 pool_active[i]);
1299 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1300 &dev->dev.kobj, "pool%d", i);
1301 if (!error)
1302 kobject_uevent(kobj, KOBJ_ADD);
1303 }
1304
1305 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1306
1307 adapter->buffer_list_dma = DMA_ERROR_CODE;
1308 adapter->filter_list_dma = DMA_ERROR_CODE;
1309 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1310
1311 ibmveth_debug_printk("registering netdev...\n");
1312
1313 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
1314
1315 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
1316 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
1317 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
1318 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
1319
1320 ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
1321
1322 if (ret == H_SUCCESS) {
1323 adapter->rx_csum = 1;
1324 netdev->features |= NETIF_F_IP_CSUM;
1325 } else
1326 ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
1327 }
1328
1329 rc = register_netdev(netdev);
1330
1331 if(rc) {
1332 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1333 free_netdev(netdev);
1334 return rc;
1335 }
1336
1337 ibmveth_debug_printk("registered\n");
1338
1339 ibmveth_proc_register_adapter(adapter);
1340
1341 return 0;
1342 }
1343
1344 static int __devexit ibmveth_remove(struct vio_dev *dev)
1345 {
1346 struct net_device *netdev = dev_get_drvdata(&dev->dev);
1347 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1348 int i;
1349
1350 for(i = 0; i<IbmVethNumBufferPools; i++)
1351 kobject_put(&adapter->rx_buff_pool[i].kobj);
1352
1353 unregister_netdev(netdev);
1354
1355 ibmveth_proc_unregister_adapter(adapter);
1356
1357 free_netdev(netdev);
1358 dev_set_drvdata(&dev->dev, NULL);
1359
1360 return 0;
1361 }
1362
1363 #ifdef CONFIG_PROC_FS
1364 static void ibmveth_proc_register_driver(void)
1365 {
1366 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1367 if (ibmveth_proc_dir) {
1368 }
1369 }
1370
1371 static void ibmveth_proc_unregister_driver(void)
1372 {
1373 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1374 }
1375
1376 static int ibmveth_show(struct seq_file *seq, void *v)
1377 {
1378 struct ibmveth_adapter *adapter = seq->private;
1379 char *current_mac = (char *) adapter->netdev->dev_addr;
1380 char *firmware_mac = (char *) &adapter->mac_addr;
1381
1382 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1383
1384 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1385 seq_printf(seq, "Current MAC: %pM\n", current_mac);
1386 seq_printf(seq, "Firmware MAC: %pM\n", firmware_mac);
1387
1388 seq_printf(seq, "\nAdapter Statistics:\n");
1389 seq_printf(seq, " TX: vio_map_single failres: %lld\n", adapter->tx_map_failed);
1390 seq_printf(seq, " send failures: %lld\n", adapter->tx_send_failed);
1391 seq_printf(seq, " RX: replenish task cycles: %lld\n", adapter->replenish_task_cycles);
1392 seq_printf(seq, " alloc_skb_failures: %lld\n", adapter->replenish_no_mem);
1393 seq_printf(seq, " add buffer failures: %lld\n", adapter->replenish_add_buff_failure);
1394 seq_printf(seq, " invalid buffers: %lld\n", adapter->rx_invalid_buffer);
1395 seq_printf(seq, " no buffers: %lld\n", adapter->rx_no_buffer);
1396
1397 return 0;
1398 }
1399
1400 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1401 {
1402 return single_open(file, ibmveth_show, PDE(inode)->data);
1403 }
1404
1405 static const struct file_operations ibmveth_proc_fops = {
1406 .owner = THIS_MODULE,
1407 .open = ibmveth_proc_open,
1408 .read = seq_read,
1409 .llseek = seq_lseek,
1410 .release = single_release,
1411 };
1412
1413 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1414 {
1415 struct proc_dir_entry *entry;
1416 if (ibmveth_proc_dir) {
1417 char u_addr[10];
1418 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1419 entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir,
1420 &ibmveth_proc_fops, adapter);
1421 if (!entry)
1422 ibmveth_error_printk("Cannot create adapter proc entry");
1423 }
1424 }
1425
1426 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1427 {
1428 if (ibmveth_proc_dir) {
1429 char u_addr[10];
1430 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1431 remove_proc_entry(u_addr, ibmveth_proc_dir);
1432 }
1433 }
1434
1435 #else /* CONFIG_PROC_FS */
1436 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1437 {
1438 }
1439
1440 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1441 {
1442 }
1443 static void ibmveth_proc_register_driver(void)
1444 {
1445 }
1446
1447 static void ibmveth_proc_unregister_driver(void)
1448 {
1449 }
1450 #endif /* CONFIG_PROC_FS */
1451
1452 static struct attribute veth_active_attr;
1453 static struct attribute veth_num_attr;
1454 static struct attribute veth_size_attr;
1455
1456 static ssize_t veth_pool_show(struct kobject * kobj,
1457 struct attribute * attr, char * buf)
1458 {
1459 struct ibmveth_buff_pool *pool = container_of(kobj,
1460 struct ibmveth_buff_pool,
1461 kobj);
1462
1463 if (attr == &veth_active_attr)
1464 return sprintf(buf, "%d\n", pool->active);
1465 else if (attr == &veth_num_attr)
1466 return sprintf(buf, "%d\n", pool->size);
1467 else if (attr == &veth_size_attr)
1468 return sprintf(buf, "%d\n", pool->buff_size);
1469 return 0;
1470 }
1471
1472 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1473 const char * buf, size_t count)
1474 {
1475 struct ibmveth_buff_pool *pool = container_of(kobj,
1476 struct ibmveth_buff_pool,
1477 kobj);
1478 struct net_device *netdev = dev_get_drvdata(
1479 container_of(kobj->parent, struct device, kobj));
1480 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1481 long value = simple_strtol(buf, NULL, 10);
1482 long rc;
1483
1484 if (attr == &veth_active_attr) {
1485 if (value && !pool->active) {
1486 if (netif_running(netdev)) {
1487 if(ibmveth_alloc_buffer_pool(pool)) {
1488 ibmveth_error_printk("unable to alloc pool\n");
1489 return -ENOMEM;
1490 }
1491 pool->active = 1;
1492 adapter->pool_config = 1;
1493 ibmveth_close(netdev);
1494 adapter->pool_config = 0;
1495 if ((rc = ibmveth_open(netdev)))
1496 return rc;
1497 } else
1498 pool->active = 1;
1499 } else if (!value && pool->active) {
1500 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1501 int i;
1502 /* Make sure there is a buffer pool with buffers that
1503 can hold a packet of the size of the MTU */
1504 for (i = 0; i < IbmVethNumBufferPools; i++) {
1505 if (pool == &adapter->rx_buff_pool[i])
1506 continue;
1507 if (!adapter->rx_buff_pool[i].active)
1508 continue;
1509 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1510 break;
1511 }
1512
1513 if (i == IbmVethNumBufferPools) {
1514 ibmveth_error_printk("no active pool >= MTU\n");
1515 return -EPERM;
1516 }
1517
1518 if (netif_running(netdev)) {
1519 adapter->pool_config = 1;
1520 ibmveth_close(netdev);
1521 pool->active = 0;
1522 adapter->pool_config = 0;
1523 if ((rc = ibmveth_open(netdev)))
1524 return rc;
1525 }
1526 pool->active = 0;
1527 }
1528 } else if (attr == &veth_num_attr) {
1529 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1530 return -EINVAL;
1531 else {
1532 if (netif_running(netdev)) {
1533 adapter->pool_config = 1;
1534 ibmveth_close(netdev);
1535 adapter->pool_config = 0;
1536 pool->size = value;
1537 if ((rc = ibmveth_open(netdev)))
1538 return rc;
1539 } else
1540 pool->size = value;
1541 }
1542 } else if (attr == &veth_size_attr) {
1543 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1544 return -EINVAL;
1545 else {
1546 if (netif_running(netdev)) {
1547 adapter->pool_config = 1;
1548 ibmveth_close(netdev);
1549 adapter->pool_config = 0;
1550 pool->buff_size = value;
1551 if ((rc = ibmveth_open(netdev)))
1552 return rc;
1553 } else
1554 pool->buff_size = value;
1555 }
1556 }
1557
1558 /* kick the interrupt handler to allocate/deallocate pools */
1559 ibmveth_interrupt(netdev->irq, netdev);
1560 return count;
1561 }
1562
1563
1564 #define ATTR(_name, _mode) \
1565 struct attribute veth_##_name##_attr = { \
1566 .name = __stringify(_name), .mode = _mode, \
1567 };
1568
1569 static ATTR(active, 0644);
1570 static ATTR(num, 0644);
1571 static ATTR(size, 0644);
1572
1573 static struct attribute * veth_pool_attrs[] = {
1574 &veth_active_attr,
1575 &veth_num_attr,
1576 &veth_size_attr,
1577 NULL,
1578 };
1579
1580 static const struct sysfs_ops veth_pool_ops = {
1581 .show = veth_pool_show,
1582 .store = veth_pool_store,
1583 };
1584
1585 static struct kobj_type ktype_veth_pool = {
1586 .release = NULL,
1587 .sysfs_ops = &veth_pool_ops,
1588 .default_attrs = veth_pool_attrs,
1589 };
1590
1591 static int ibmveth_resume(struct device *dev)
1592 {
1593 struct net_device *netdev = dev_get_drvdata(dev);
1594 ibmveth_interrupt(netdev->irq, netdev);
1595 return 0;
1596 }
1597
1598 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1599 { "network", "IBM,l-lan"},
1600 { "", "" }
1601 };
1602 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1603
1604 static struct dev_pm_ops ibmveth_pm_ops = {
1605 .resume = ibmveth_resume
1606 };
1607
1608 static struct vio_driver ibmveth_driver = {
1609 .id_table = ibmveth_device_table,
1610 .probe = ibmveth_probe,
1611 .remove = ibmveth_remove,
1612 .get_desired_dma = ibmveth_get_desired_dma,
1613 .driver = {
1614 .name = ibmveth_driver_name,
1615 .owner = THIS_MODULE,
1616 .pm = &ibmveth_pm_ops,
1617 }
1618 };
1619
1620 static int __init ibmveth_module_init(void)
1621 {
1622 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1623
1624 ibmveth_proc_register_driver();
1625
1626 return vio_register_driver(&ibmveth_driver);
1627 }
1628
1629 static void __exit ibmveth_module_exit(void)
1630 {
1631 vio_unregister_driver(&ibmveth_driver);
1632 ibmveth_proc_unregister_driver();
1633 }
1634
1635 module_init(ibmveth_module_init);
1636 module_exit(ibmveth_module_exit);
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