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-rw-r--r--drivers/net/ethernet/ibm/ibmveth.c1638
1 files changed, 1638 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
new file mode 100644
index 000000000000..b1cd41b9c61c
--- /dev/null
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -0,0 +1,1638 @@
1/*
2 * IBM Power Virtual Ethernet Device Driver
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * Copyright (C) IBM Corporation, 2003, 2010
19 *
20 * Authors: Dave Larson <larson1@us.ibm.com>
21 * Santiago Leon <santil@linux.vnet.ibm.com>
22 * Brian King <brking@linux.vnet.ibm.com>
23 * Robert Jennings <rcj@linux.vnet.ibm.com>
24 * Anton Blanchard <anton@au.ibm.com>
25 */
26
27#include <linux/module.h>
28#include <linux/moduleparam.h>
29#include <linux/types.h>
30#include <linux/errno.h>
31#include <linux/dma-mapping.h>
32#include <linux/kernel.h>
33#include <linux/netdevice.h>
34#include <linux/etherdevice.h>
35#include <linux/skbuff.h>
36#include <linux/init.h>
37#include <linux/interrupt.h>
38#include <linux/mm.h>
39#include <linux/pm.h>
40#include <linux/ethtool.h>
41#include <linux/in.h>
42#include <linux/ip.h>
43#include <linux/ipv6.h>
44#include <linux/slab.h>
45#include <asm/hvcall.h>
46#include <linux/atomic.h>
47#include <asm/vio.h>
48#include <asm/iommu.h>
49#include <asm/firmware.h>
50
51#include "ibmveth.h"
52
53static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
54static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
55static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
56
57static struct kobj_type ktype_veth_pool;
58
59
60static const char ibmveth_driver_name[] = "ibmveth";
61static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
62#define ibmveth_driver_version "1.04"
63
64MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>");
65MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
66MODULE_LICENSE("GPL");
67MODULE_VERSION(ibmveth_driver_version);
68
69static unsigned int tx_copybreak __read_mostly = 128;
70module_param(tx_copybreak, uint, 0644);
71MODULE_PARM_DESC(tx_copybreak,
72 "Maximum size of packet that is copied to a new buffer on transmit");
73
74static unsigned int rx_copybreak __read_mostly = 128;
75module_param(rx_copybreak, uint, 0644);
76MODULE_PARM_DESC(rx_copybreak,
77 "Maximum size of packet that is copied to a new buffer on receive");
78
79static unsigned int rx_flush __read_mostly = 0;
80module_param(rx_flush, uint, 0644);
81MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
82
83struct ibmveth_stat {
84 char name[ETH_GSTRING_LEN];
85 int offset;
86};
87
88#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
89#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
90
91struct ibmveth_stat ibmveth_stats[] = {
92 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
93 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
94 { "replenish_add_buff_failure",
95 IBMVETH_STAT_OFF(replenish_add_buff_failure) },
96 { "replenish_add_buff_success",
97 IBMVETH_STAT_OFF(replenish_add_buff_success) },
98 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
99 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
100 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
101 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
102 { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
103 { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
104};
105
106/* simple methods of getting data from the current rxq entry */
107static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
108{
109 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
110}
111
112static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
113{
114 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >>
115 IBMVETH_RXQ_TOGGLE_SHIFT;
116}
117
118static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
119{
120 return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle;
121}
122
123static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
124{
125 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID;
126}
127
128static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
129{
130 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK;
131}
132
133static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
134{
135 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].length;
136}
137
138static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
139{
140 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD;
141}
142
143/* setup the initial settings for a buffer pool */
144static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool,
145 u32 pool_index, u32 pool_size,
146 u32 buff_size, u32 pool_active)
147{
148 pool->size = pool_size;
149 pool->index = pool_index;
150 pool->buff_size = buff_size;
151 pool->threshold = pool_size * 7 / 8;
152 pool->active = pool_active;
153}
154
155/* allocate and setup an buffer pool - called during open */
156static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
157{
158 int i;
159
160 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
161
162 if (!pool->free_map)
163 return -1;
164
165 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
166 if (!pool->dma_addr) {
167 kfree(pool->free_map);
168 pool->free_map = NULL;
169 return -1;
170 }
171
172 pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
173
174 if (!pool->skbuff) {
175 kfree(pool->dma_addr);
176 pool->dma_addr = NULL;
177
178 kfree(pool->free_map);
179 pool->free_map = NULL;
180 return -1;
181 }
182
183 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
184
185 for (i = 0; i < pool->size; ++i)
186 pool->free_map[i] = i;
187
188 atomic_set(&pool->available, 0);
189 pool->producer_index = 0;
190 pool->consumer_index = 0;
191
192 return 0;
193}
194
195static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
196{
197 unsigned long offset;
198
199 for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
200 asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
201}
202
203/* replenish the buffers for a pool. note that we don't need to
204 * skb_reserve these since they are used for incoming...
205 */
206static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
207 struct ibmveth_buff_pool *pool)
208{
209 u32 i;
210 u32 count = pool->size - atomic_read(&pool->available);
211 u32 buffers_added = 0;
212 struct sk_buff *skb;
213 unsigned int free_index, index;
214 u64 correlator;
215 unsigned long lpar_rc;
216 dma_addr_t dma_addr;
217
218 mb();
219
220 for (i = 0; i < count; ++i) {
221 union ibmveth_buf_desc desc;
222
223 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
224
225 if (!skb) {
226 netdev_dbg(adapter->netdev,
227 "replenish: unable to allocate skb\n");
228 adapter->replenish_no_mem++;
229 break;
230 }
231
232 free_index = pool->consumer_index;
233 pool->consumer_index++;
234 if (pool->consumer_index >= pool->size)
235 pool->consumer_index = 0;
236 index = pool->free_map[free_index];
237
238 BUG_ON(index == IBM_VETH_INVALID_MAP);
239 BUG_ON(pool->skbuff[index] != NULL);
240
241 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
242 pool->buff_size, DMA_FROM_DEVICE);
243
244 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
245 goto failure;
246
247 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
248 pool->dma_addr[index] = dma_addr;
249 pool->skbuff[index] = skb;
250
251 correlator = ((u64)pool->index << 32) | index;
252 *(u64 *)skb->data = correlator;
253
254 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
255 desc.fields.address = dma_addr;
256
257 if (rx_flush) {
258 unsigned int len = min(pool->buff_size,
259 adapter->netdev->mtu +
260 IBMVETH_BUFF_OH);
261 ibmveth_flush_buffer(skb->data, len);
262 }
263 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address,
264 desc.desc);
265
266 if (lpar_rc != H_SUCCESS) {
267 goto failure;
268 } else {
269 buffers_added++;
270 adapter->replenish_add_buff_success++;
271 }
272 }
273
274 mb();
275 atomic_add(buffers_added, &(pool->available));
276 return;
277
278failure:
279 pool->free_map[free_index] = index;
280 pool->skbuff[index] = NULL;
281 if (pool->consumer_index == 0)
282 pool->consumer_index = pool->size - 1;
283 else
284 pool->consumer_index--;
285 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
286 dma_unmap_single(&adapter->vdev->dev,
287 pool->dma_addr[index], pool->buff_size,
288 DMA_FROM_DEVICE);
289 dev_kfree_skb_any(skb);
290 adapter->replenish_add_buff_failure++;
291
292 mb();
293 atomic_add(buffers_added, &(pool->available));
294}
295
296/* replenish routine */
297static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
298{
299 int i;
300
301 adapter->replenish_task_cycles++;
302
303 for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) {
304 struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
305
306 if (pool->active &&
307 (atomic_read(&pool->available) < pool->threshold))
308 ibmveth_replenish_buffer_pool(adapter, pool);
309 }
310
311 adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) +
312 4096 - 8);
313}
314
315/* empty and free ana buffer pool - also used to do cleanup in error paths */
316static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter,
317 struct ibmveth_buff_pool *pool)
318{
319 int i;
320
321 kfree(pool->free_map);
322 pool->free_map = NULL;
323
324 if (pool->skbuff && pool->dma_addr) {
325 for (i = 0; i < pool->size; ++i) {
326 struct sk_buff *skb = pool->skbuff[i];
327 if (skb) {
328 dma_unmap_single(&adapter->vdev->dev,
329 pool->dma_addr[i],
330 pool->buff_size,
331 DMA_FROM_DEVICE);
332 dev_kfree_skb_any(skb);
333 pool->skbuff[i] = NULL;
334 }
335 }
336 }
337
338 if (pool->dma_addr) {
339 kfree(pool->dma_addr);
340 pool->dma_addr = NULL;
341 }
342
343 if (pool->skbuff) {
344 kfree(pool->skbuff);
345 pool->skbuff = NULL;
346 }
347}
348
349/* remove a buffer from a pool */
350static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
351 u64 correlator)
352{
353 unsigned int pool = correlator >> 32;
354 unsigned int index = correlator & 0xffffffffUL;
355 unsigned int free_index;
356 struct sk_buff *skb;
357
358 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
359 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
360
361 skb = adapter->rx_buff_pool[pool].skbuff[index];
362
363 BUG_ON(skb == NULL);
364
365 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
366
367 dma_unmap_single(&adapter->vdev->dev,
368 adapter->rx_buff_pool[pool].dma_addr[index],
369 adapter->rx_buff_pool[pool].buff_size,
370 DMA_FROM_DEVICE);
371
372 free_index = adapter->rx_buff_pool[pool].producer_index;
373 adapter->rx_buff_pool[pool].producer_index++;
374 if (adapter->rx_buff_pool[pool].producer_index >=
375 adapter->rx_buff_pool[pool].size)
376 adapter->rx_buff_pool[pool].producer_index = 0;
377 adapter->rx_buff_pool[pool].free_map[free_index] = index;
378
379 mb();
380
381 atomic_dec(&(adapter->rx_buff_pool[pool].available));
382}
383
384/* get the current buffer on the rx queue */
385static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
386{
387 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
388 unsigned int pool = correlator >> 32;
389 unsigned int index = correlator & 0xffffffffUL;
390
391 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
392 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
393
394 return adapter->rx_buff_pool[pool].skbuff[index];
395}
396
397/* recycle the current buffer on the rx queue */
398static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
399{
400 u32 q_index = adapter->rx_queue.index;
401 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
402 unsigned int pool = correlator >> 32;
403 unsigned int index = correlator & 0xffffffffUL;
404 union ibmveth_buf_desc desc;
405 unsigned long lpar_rc;
406 int ret = 1;
407
408 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
409 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
410
411 if (!adapter->rx_buff_pool[pool].active) {
412 ibmveth_rxq_harvest_buffer(adapter);
413 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
414 goto out;
415 }
416
417 desc.fields.flags_len = IBMVETH_BUF_VALID |
418 adapter->rx_buff_pool[pool].buff_size;
419 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
420
421 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
422
423 if (lpar_rc != H_SUCCESS) {
424 netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed "
425 "during recycle rc=%ld", lpar_rc);
426 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
427 ret = 0;
428 }
429
430 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
431 adapter->rx_queue.index = 0;
432 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
433 }
434
435out:
436 return ret;
437}
438
439static 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
449static 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 < IBMVETH_NUM_BUFF_POOLS; 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
504static 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 /*
510 * After a kexec the adapter will still be open, so our attempt to
511 * open it will fail. So if we get a failure we free the adapter and
512 * try again, but only once.
513 */
514retry:
515 rc = h_register_logical_lan(adapter->vdev->unit_address,
516 adapter->buffer_list_dma, rxq_desc.desc,
517 adapter->filter_list_dma, mac_address);
518
519 if (rc != H_SUCCESS && try_again) {
520 do {
521 rc = h_free_logical_lan(adapter->vdev->unit_address);
522 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
523
524 try_again = 0;
525 goto retry;
526 }
527
528 return rc;
529}
530
531static int ibmveth_open(struct net_device *netdev)
532{
533 struct ibmveth_adapter *adapter = netdev_priv(netdev);
534 u64 mac_address = 0;
535 int rxq_entries = 1;
536 unsigned long lpar_rc;
537 int rc;
538 union ibmveth_buf_desc rxq_desc;
539 int i;
540 struct device *dev;
541
542 netdev_dbg(netdev, "open starting\n");
543
544 napi_enable(&adapter->napi);
545
546 for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
547 rxq_entries += adapter->rx_buff_pool[i].size;
548
549 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
550 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
551
552 if (!adapter->buffer_list_addr || !adapter->filter_list_addr) {
553 netdev_err(netdev, "unable to allocate filter or buffer list "
554 "pages\n");
555 rc = -ENOMEM;
556 goto err_out;
557 }
558
559 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) *
560 rxq_entries;
561 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len,
562 GFP_KERNEL);
563
564 if (!adapter->rx_queue.queue_addr) {
565 netdev_err(netdev, "unable to allocate rx queue pages\n");
566 rc = -ENOMEM;
567 goto err_out;
568 }
569
570 dev = &adapter->vdev->dev;
571
572 adapter->buffer_list_dma = dma_map_single(dev,
573 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
574 adapter->filter_list_dma = dma_map_single(dev,
575 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
576 adapter->rx_queue.queue_dma = dma_map_single(dev,
577 adapter->rx_queue.queue_addr,
578 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
579
580 if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
581 (dma_mapping_error(dev, adapter->filter_list_dma)) ||
582 (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
583 netdev_err(netdev, "unable to map filter or buffer list "
584 "pages\n");
585 rc = -ENOMEM;
586 goto err_out;
587 }
588
589 adapter->rx_queue.index = 0;
590 adapter->rx_queue.num_slots = rxq_entries;
591 adapter->rx_queue.toggle = 1;
592
593 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
594 mac_address = mac_address >> 16;
595
596 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID |
597 adapter->rx_queue.queue_len;
598 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
599
600 netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr);
601 netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr);
602 netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
603
604 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
605
606 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
607
608 if (lpar_rc != H_SUCCESS) {
609 netdev_err(netdev, "h_register_logical_lan failed with %ld\n",
610 lpar_rc);
611 netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq "
612 "desc:0x%llx MAC:0x%llx\n",
613 adapter->buffer_list_dma,
614 adapter->filter_list_dma,
615 rxq_desc.desc,
616 mac_address);
617 rc = -ENONET;
618 goto err_out;
619 }
620
621 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
622 if (!adapter->rx_buff_pool[i].active)
623 continue;
624 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
625 netdev_err(netdev, "unable to alloc pool\n");
626 adapter->rx_buff_pool[i].active = 0;
627 rc = -ENOMEM;
628 goto err_out;
629 }
630 }
631
632 netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq);
633 rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name,
634 netdev);
635 if (rc != 0) {
636 netdev_err(netdev, "unable to request irq 0x%x, rc %d\n",
637 netdev->irq, rc);
638 do {
639 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
640 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
641
642 goto err_out;
643 }
644
645 adapter->bounce_buffer =
646 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
647 if (!adapter->bounce_buffer) {
648 netdev_err(netdev, "unable to allocate bounce buffer\n");
649 rc = -ENOMEM;
650 goto err_out_free_irq;
651 }
652 adapter->bounce_buffer_dma =
653 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
654 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
655 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
656 netdev_err(netdev, "unable to map bounce buffer\n");
657 rc = -ENOMEM;
658 goto err_out_free_irq;
659 }
660
661 netdev_dbg(netdev, "initial replenish cycle\n");
662 ibmveth_interrupt(netdev->irq, netdev);
663
664 netif_start_queue(netdev);
665
666 netdev_dbg(netdev, "open complete\n");
667
668 return 0;
669
670err_out_free_irq:
671 free_irq(netdev->irq, netdev);
672err_out:
673 ibmveth_cleanup(adapter);
674 napi_disable(&adapter->napi);
675 return rc;
676}
677
678static int ibmveth_close(struct net_device *netdev)
679{
680 struct ibmveth_adapter *adapter = netdev_priv(netdev);
681 long lpar_rc;
682
683 netdev_dbg(netdev, "close starting\n");
684
685 napi_disable(&adapter->napi);
686
687 if (!adapter->pool_config)
688 netif_stop_queue(netdev);
689
690 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
691
692 do {
693 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
694 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
695
696 if (lpar_rc != H_SUCCESS) {
697 netdev_err(netdev, "h_free_logical_lan failed with %lx, "
698 "continuing with close\n", lpar_rc);
699 }
700
701 free_irq(netdev->irq, netdev);
702
703 adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) +
704 4096 - 8);
705
706 ibmveth_cleanup(adapter);
707
708 netdev_dbg(netdev, "close complete\n");
709
710 return 0;
711}
712
713static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
714{
715 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
716 SUPPORTED_FIBRE);
717 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
718 ADVERTISED_FIBRE);
719 ethtool_cmd_speed_set(cmd, SPEED_1000);
720 cmd->duplex = DUPLEX_FULL;
721 cmd->port = PORT_FIBRE;
722 cmd->phy_address = 0;
723 cmd->transceiver = XCVR_INTERNAL;
724 cmd->autoneg = AUTONEG_ENABLE;
725 cmd->maxtxpkt = 0;
726 cmd->maxrxpkt = 1;
727 return 0;
728}
729
730static void netdev_get_drvinfo(struct net_device *dev,
731 struct ethtool_drvinfo *info)
732{
733 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
734 strncpy(info->version, ibmveth_driver_version,
735 sizeof(info->version) - 1);
736}
737
738static u32 ibmveth_fix_features(struct net_device *dev, u32 features)
739{
740 /*
741 * Since the ibmveth firmware interface does not have the
742 * concept of separate tx/rx checksum offload enable, if rx
743 * checksum is disabled we also have to disable tx checksum
744 * offload. Once we disable rx checksum offload, we are no
745 * longer allowed to send tx buffers that are not properly
746 * checksummed.
747 */
748
749 if (!(features & NETIF_F_RXCSUM))
750 features &= ~NETIF_F_ALL_CSUM;
751
752 return features;
753}
754
755static int ibmveth_set_csum_offload(struct net_device *dev, u32 data)
756{
757 struct ibmveth_adapter *adapter = netdev_priv(dev);
758 unsigned long set_attr, clr_attr, ret_attr;
759 unsigned long set_attr6, clr_attr6;
760 long ret, ret4, ret6;
761 int rc1 = 0, rc2 = 0;
762 int restart = 0;
763
764 if (netif_running(dev)) {
765 restart = 1;
766 adapter->pool_config = 1;
767 ibmveth_close(dev);
768 adapter->pool_config = 0;
769 }
770
771 set_attr = 0;
772 clr_attr = 0;
773 set_attr6 = 0;
774 clr_attr6 = 0;
775
776 if (data) {
777 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
778 set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
779 } else {
780 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
781 clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
782 }
783
784 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
785
786 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
787 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
788 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
789 ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
790 set_attr, &ret_attr);
791
792 if (ret4 != H_SUCCESS) {
793 netdev_err(dev, "unable to change IPv4 checksum "
794 "offload settings. %d rc=%ld\n",
795 data, ret4);
796
797 h_illan_attributes(adapter->vdev->unit_address,
798 set_attr, clr_attr, &ret_attr);
799
800 if (data == 1)
801 dev->features &= ~NETIF_F_IP_CSUM;
802
803 } else {
804 adapter->fw_ipv4_csum_support = data;
805 }
806
807 ret6 = h_illan_attributes(adapter->vdev->unit_address,
808 clr_attr6, set_attr6, &ret_attr);
809
810 if (ret6 != H_SUCCESS) {
811 netdev_err(dev, "unable to change IPv6 checksum "
812 "offload settings. %d rc=%ld\n",
813 data, ret6);
814
815 h_illan_attributes(adapter->vdev->unit_address,
816 set_attr6, clr_attr6, &ret_attr);
817
818 if (data == 1)
819 dev->features &= ~NETIF_F_IPV6_CSUM;
820
821 } else
822 adapter->fw_ipv6_csum_support = data;
823
824 if (ret4 == H_SUCCESS || ret6 == H_SUCCESS)
825 adapter->rx_csum = data;
826 else
827 rc1 = -EIO;
828 } else {
829 rc1 = -EIO;
830 netdev_err(dev, "unable to change checksum offload settings."
831 " %d rc=%ld ret_attr=%lx\n", data, ret,
832 ret_attr);
833 }
834
835 if (restart)
836 rc2 = ibmveth_open(dev);
837
838 return rc1 ? rc1 : rc2;
839}
840
841static int ibmveth_set_features(struct net_device *dev, u32 features)
842{
843 struct ibmveth_adapter *adapter = netdev_priv(dev);
844 int rx_csum = !!(features & NETIF_F_RXCSUM);
845 int rc;
846
847 if (rx_csum == adapter->rx_csum)
848 return 0;
849
850 rc = ibmveth_set_csum_offload(dev, rx_csum);
851 if (rc && !adapter->rx_csum)
852 dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM);
853
854 return rc;
855}
856
857static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
858{
859 int i;
860
861 if (stringset != ETH_SS_STATS)
862 return;
863
864 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
865 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
866}
867
868static int ibmveth_get_sset_count(struct net_device *dev, int sset)
869{
870 switch (sset) {
871 case ETH_SS_STATS:
872 return ARRAY_SIZE(ibmveth_stats);
873 default:
874 return -EOPNOTSUPP;
875 }
876}
877
878static void ibmveth_get_ethtool_stats(struct net_device *dev,
879 struct ethtool_stats *stats, u64 *data)
880{
881 int i;
882 struct ibmveth_adapter *adapter = netdev_priv(dev);
883
884 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
885 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
886}
887
888static const struct ethtool_ops netdev_ethtool_ops = {
889 .get_drvinfo = netdev_get_drvinfo,
890 .get_settings = netdev_get_settings,
891 .get_link = ethtool_op_get_link,
892 .get_strings = ibmveth_get_strings,
893 .get_sset_count = ibmveth_get_sset_count,
894 .get_ethtool_stats = ibmveth_get_ethtool_stats,
895};
896
897static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
898{
899 return -EOPNOTSUPP;
900}
901
902#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
903
904static int ibmveth_send(struct ibmveth_adapter *adapter,
905 union ibmveth_buf_desc *descs)
906{
907 unsigned long correlator;
908 unsigned int retry_count;
909 unsigned long ret;
910
911 /*
912 * The retry count sets a maximum for the number of broadcast and
913 * multicast destinations within the system.
914 */
915 retry_count = 1024;
916 correlator = 0;
917 do {
918 ret = h_send_logical_lan(adapter->vdev->unit_address,
919 descs[0].desc, descs[1].desc,
920 descs[2].desc, descs[3].desc,
921 descs[4].desc, descs[5].desc,
922 correlator, &correlator);
923 } while ((ret == H_BUSY) && (retry_count--));
924
925 if (ret != H_SUCCESS && ret != H_DROPPED) {
926 netdev_err(adapter->netdev, "tx: h_send_logical_lan failed "
927 "with rc=%ld\n", ret);
928 return 1;
929 }
930
931 return 0;
932}
933
934static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
935 struct net_device *netdev)
936{
937 struct ibmveth_adapter *adapter = netdev_priv(netdev);
938 unsigned int desc_flags;
939 union ibmveth_buf_desc descs[6];
940 int last, i;
941 int force_bounce = 0;
942 dma_addr_t dma_addr;
943
944 /*
945 * veth handles a maximum of 6 segments including the header, so
946 * we have to linearize the skb if there are more than this.
947 */
948 if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
949 netdev->stats.tx_dropped++;
950 goto out;
951 }
952
953 /* veth can't checksum offload UDP */
954 if (skb->ip_summed == CHECKSUM_PARTIAL &&
955 ((skb->protocol == htons(ETH_P_IP) &&
956 ip_hdr(skb)->protocol != IPPROTO_TCP) ||
957 (skb->protocol == htons(ETH_P_IPV6) &&
958 ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
959 skb_checksum_help(skb)) {
960
961 netdev_err(netdev, "tx: failed to checksum packet\n");
962 netdev->stats.tx_dropped++;
963 goto out;
964 }
965
966 desc_flags = IBMVETH_BUF_VALID;
967
968 if (skb->ip_summed == CHECKSUM_PARTIAL) {
969 unsigned char *buf = skb_transport_header(skb) +
970 skb->csum_offset;
971
972 desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
973
974 /* Need to zero out the checksum */
975 buf[0] = 0;
976 buf[1] = 0;
977 }
978
979retry_bounce:
980 memset(descs, 0, sizeof(descs));
981
982 /*
983 * If a linear packet is below the rx threshold then
984 * copy it into the static bounce buffer. This avoids the
985 * cost of a TCE insert and remove.
986 */
987 if (force_bounce || (!skb_is_nonlinear(skb) &&
988 (skb->len < tx_copybreak))) {
989 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
990 skb->len);
991
992 descs[0].fields.flags_len = desc_flags | skb->len;
993 descs[0].fields.address = adapter->bounce_buffer_dma;
994
995 if (ibmveth_send(adapter, descs)) {
996 adapter->tx_send_failed++;
997 netdev->stats.tx_dropped++;
998 } else {
999 netdev->stats.tx_packets++;
1000 netdev->stats.tx_bytes += skb->len;
1001 }
1002
1003 goto out;
1004 }
1005
1006 /* Map the header */
1007 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
1008 skb_headlen(skb), DMA_TO_DEVICE);
1009 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
1010 goto map_failed;
1011
1012 descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
1013 descs[0].fields.address = dma_addr;
1014
1015 /* Map the frags */
1016 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1017 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1018
1019 dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0,
1020 skb_frag_size(frag), DMA_TO_DEVICE);
1021
1022 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
1023 goto map_failed_frags;
1024
1025 descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag);
1026 descs[i+1].fields.address = dma_addr;
1027 }
1028
1029 if (ibmveth_send(adapter, descs)) {
1030 adapter->tx_send_failed++;
1031 netdev->stats.tx_dropped++;
1032 } else {
1033 netdev->stats.tx_packets++;
1034 netdev->stats.tx_bytes += skb->len;
1035 }
1036
1037 dma_unmap_single(&adapter->vdev->dev,
1038 descs[0].fields.address,
1039 descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1040 DMA_TO_DEVICE);
1041
1042 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++)
1043 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1044 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1045 DMA_TO_DEVICE);
1046
1047out:
1048 dev_kfree_skb(skb);
1049 return NETDEV_TX_OK;
1050
1051map_failed_frags:
1052 last = i+1;
1053 for (i = 0; i < last; i++)
1054 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1055 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1056 DMA_TO_DEVICE);
1057
1058map_failed:
1059 if (!firmware_has_feature(FW_FEATURE_CMO))
1060 netdev_err(netdev, "tx: unable to map xmit buffer\n");
1061 adapter->tx_map_failed++;
1062 skb_linearize(skb);
1063 force_bounce = 1;
1064 goto retry_bounce;
1065}
1066
1067static int ibmveth_poll(struct napi_struct *napi, int budget)
1068{
1069 struct ibmveth_adapter *adapter =
1070 container_of(napi, struct ibmveth_adapter, napi);
1071 struct net_device *netdev = adapter->netdev;
1072 int frames_processed = 0;
1073 unsigned long lpar_rc;
1074
1075restart_poll:
1076 do {
1077 if (!ibmveth_rxq_pending_buffer(adapter))
1078 break;
1079
1080 smp_rmb();
1081 if (!ibmveth_rxq_buffer_valid(adapter)) {
1082 wmb(); /* suggested by larson1 */
1083 adapter->rx_invalid_buffer++;
1084 netdev_dbg(netdev, "recycling invalid buffer\n");
1085 ibmveth_rxq_recycle_buffer(adapter);
1086 } else {
1087 struct sk_buff *skb, *new_skb;
1088 int length = ibmveth_rxq_frame_length(adapter);
1089 int offset = ibmveth_rxq_frame_offset(adapter);
1090 int csum_good = ibmveth_rxq_csum_good(adapter);
1091
1092 skb = ibmveth_rxq_get_buffer(adapter);
1093
1094 new_skb = NULL;
1095 if (length < rx_copybreak)
1096 new_skb = netdev_alloc_skb(netdev, length);
1097
1098 if (new_skb) {
1099 skb_copy_to_linear_data(new_skb,
1100 skb->data + offset,
1101 length);
1102 if (rx_flush)
1103 ibmveth_flush_buffer(skb->data,
1104 length + offset);
1105 if (!ibmveth_rxq_recycle_buffer(adapter))
1106 kfree_skb(skb);
1107 skb = new_skb;
1108 } else {
1109 ibmveth_rxq_harvest_buffer(adapter);
1110 skb_reserve(skb, offset);
1111 }
1112
1113 skb_put(skb, length);
1114 skb->protocol = eth_type_trans(skb, netdev);
1115
1116 if (csum_good)
1117 skb->ip_summed = CHECKSUM_UNNECESSARY;
1118
1119 netif_receive_skb(skb); /* send it up */
1120
1121 netdev->stats.rx_packets++;
1122 netdev->stats.rx_bytes += length;
1123 frames_processed++;
1124 }
1125 } while (frames_processed < budget);
1126
1127 ibmveth_replenish_task(adapter);
1128
1129 if (frames_processed < budget) {
1130 /* We think we are done - reenable interrupts,
1131 * then check once more to make sure we are done.
1132 */
1133 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1134 VIO_IRQ_ENABLE);
1135
1136 BUG_ON(lpar_rc != H_SUCCESS);
1137
1138 napi_complete(napi);
1139
1140 if (ibmveth_rxq_pending_buffer(adapter) &&
1141 napi_reschedule(napi)) {
1142 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1143 VIO_IRQ_DISABLE);
1144 goto restart_poll;
1145 }
1146 }
1147
1148 return frames_processed;
1149}
1150
1151static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1152{
1153 struct net_device *netdev = dev_instance;
1154 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1155 unsigned long lpar_rc;
1156
1157 if (napi_schedule_prep(&adapter->napi)) {
1158 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1159 VIO_IRQ_DISABLE);
1160 BUG_ON(lpar_rc != H_SUCCESS);
1161 __napi_schedule(&adapter->napi);
1162 }
1163 return IRQ_HANDLED;
1164}
1165
1166static void ibmveth_set_multicast_list(struct net_device *netdev)
1167{
1168 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1169 unsigned long lpar_rc;
1170
1171 if ((netdev->flags & IFF_PROMISC) ||
1172 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
1173 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1174 IbmVethMcastEnableRecv |
1175 IbmVethMcastDisableFiltering,
1176 0);
1177 if (lpar_rc != H_SUCCESS) {
1178 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1179 "entering promisc mode\n", lpar_rc);
1180 }
1181 } else {
1182 struct netdev_hw_addr *ha;
1183 /* clear the filter table & disable filtering */
1184 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1185 IbmVethMcastEnableRecv |
1186 IbmVethMcastDisableFiltering |
1187 IbmVethMcastClearFilterTable,
1188 0);
1189 if (lpar_rc != H_SUCCESS) {
1190 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1191 "attempting to clear filter table\n",
1192 lpar_rc);
1193 }
1194 /* add the addresses to the filter table */
1195 netdev_for_each_mc_addr(ha, netdev) {
1196 /* add the multicast address to the filter table */
1197 unsigned long mcast_addr = 0;
1198 memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
1199 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1200 IbmVethMcastAddFilter,
1201 mcast_addr);
1202 if (lpar_rc != H_SUCCESS) {
1203 netdev_err(netdev, "h_multicast_ctrl rc=%ld "
1204 "when adding an entry to the filter "
1205 "table\n", lpar_rc);
1206 }
1207 }
1208
1209 /* re-enable filtering */
1210 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1211 IbmVethMcastEnableFiltering,
1212 0);
1213 if (lpar_rc != H_SUCCESS) {
1214 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1215 "enabling filtering\n", lpar_rc);
1216 }
1217 }
1218}
1219
1220static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1221{
1222 struct ibmveth_adapter *adapter = netdev_priv(dev);
1223 struct vio_dev *viodev = adapter->vdev;
1224 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1225 int i, rc;
1226 int need_restart = 0;
1227
1228 if (new_mtu < IBMVETH_MIN_MTU)
1229 return -EINVAL;
1230
1231 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
1232 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1233 break;
1234
1235 if (i == IBMVETH_NUM_BUFF_POOLS)
1236 return -EINVAL;
1237
1238 /* Deactivate all the buffer pools so that the next loop can activate
1239 only the buffer pools necessary to hold the new MTU */
1240 if (netif_running(adapter->netdev)) {
1241 need_restart = 1;
1242 adapter->pool_config = 1;
1243 ibmveth_close(adapter->netdev);
1244 adapter->pool_config = 0;
1245 }
1246
1247 /* Look for an active buffer pool that can hold the new MTU */
1248 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1249 adapter->rx_buff_pool[i].active = 1;
1250
1251 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1252 dev->mtu = new_mtu;
1253 vio_cmo_set_dev_desired(viodev,
1254 ibmveth_get_desired_dma
1255 (viodev));
1256 if (need_restart) {
1257 return ibmveth_open(adapter->netdev);
1258 }
1259 return 0;
1260 }
1261 }
1262
1263 if (need_restart && (rc = ibmveth_open(adapter->netdev)))
1264 return rc;
1265
1266 return -EINVAL;
1267}
1268
1269#ifdef CONFIG_NET_POLL_CONTROLLER
1270static void ibmveth_poll_controller(struct net_device *dev)
1271{
1272 ibmveth_replenish_task(netdev_priv(dev));
1273 ibmveth_interrupt(dev->irq, dev);
1274}
1275#endif
1276
1277/**
1278 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1279 *
1280 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1281 *
1282 * Return value:
1283 * Number of bytes of IO data the driver will need to perform well.
1284 */
1285static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1286{
1287 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1288 struct ibmveth_adapter *adapter;
1289 unsigned long ret;
1290 int i;
1291 int rxqentries = 1;
1292
1293 /* netdev inits at probe time along with the structures we need below*/
1294 if (netdev == NULL)
1295 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1296
1297 adapter = netdev_priv(netdev);
1298
1299 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1300 ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1301
1302 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1303 /* add the size of the active receive buffers */
1304 if (adapter->rx_buff_pool[i].active)
1305 ret +=
1306 adapter->rx_buff_pool[i].size *
1307 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1308 buff_size);
1309 rxqentries += adapter->rx_buff_pool[i].size;
1310 }
1311 /* add the size of the receive queue entries */
1312 ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1313
1314 return ret;
1315}
1316
1317static const struct net_device_ops ibmveth_netdev_ops = {
1318 .ndo_open = ibmveth_open,
1319 .ndo_stop = ibmveth_close,
1320 .ndo_start_xmit = ibmveth_start_xmit,
1321 .ndo_set_rx_mode = ibmveth_set_multicast_list,
1322 .ndo_do_ioctl = ibmveth_ioctl,
1323 .ndo_change_mtu = ibmveth_change_mtu,
1324 .ndo_fix_features = ibmveth_fix_features,
1325 .ndo_set_features = ibmveth_set_features,
1326 .ndo_validate_addr = eth_validate_addr,
1327 .ndo_set_mac_address = eth_mac_addr,
1328#ifdef CONFIG_NET_POLL_CONTROLLER
1329 .ndo_poll_controller = ibmveth_poll_controller,
1330#endif
1331};
1332
1333static int __devinit ibmveth_probe(struct vio_dev *dev,
1334 const struct vio_device_id *id)
1335{
1336 int rc, i;
1337 struct net_device *netdev;
1338 struct ibmveth_adapter *adapter;
1339 unsigned char *mac_addr_p;
1340 unsigned int *mcastFilterSize_p;
1341
1342 dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n",
1343 dev->unit_address);
1344
1345 mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR,
1346 NULL);
1347 if (!mac_addr_p) {
1348 dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
1349 return -EINVAL;
1350 }
1351
1352 mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev,
1353 VETH_MCAST_FILTER_SIZE, NULL);
1354 if (!mcastFilterSize_p) {
1355 dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
1356 "attribute\n");
1357 return -EINVAL;
1358 }
1359
1360 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1361
1362 if (!netdev)
1363 return -ENOMEM;
1364
1365 adapter = netdev_priv(netdev);
1366 dev_set_drvdata(&dev->dev, netdev);
1367
1368 adapter->vdev = dev;
1369 adapter->netdev = netdev;
1370 adapter->mcastFilterSize = *mcastFilterSize_p;
1371 adapter->pool_config = 0;
1372
1373 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1374
1375 /*
1376 * Some older boxes running PHYP non-natively have an OF that returns
1377 * a 8-byte local-mac-address field (and the first 2 bytes have to be
1378 * ignored) while newer boxes' OF return a 6-byte field. Note that
1379 * IEEE 1275 specifies that local-mac-address must be a 6-byte field.
1380 * The RPA doc specifies that the first byte must be 10b, so we'll
1381 * just look for it to solve this 8 vs. 6 byte field issue
1382 */
1383 if ((*mac_addr_p & 0x3) != 0x02)
1384 mac_addr_p += 2;
1385
1386 adapter->mac_addr = 0;
1387 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1388
1389 netdev->irq = dev->irq;
1390 netdev->netdev_ops = &ibmveth_netdev_ops;
1391 netdev->ethtool_ops = &netdev_ethtool_ops;
1392 SET_NETDEV_DEV(netdev, &dev->dev);
1393 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
1394 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1395 netdev->features |= netdev->hw_features;
1396
1397 memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1398
1399 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1400 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1401 int error;
1402
1403 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1404 pool_count[i], pool_size[i],
1405 pool_active[i]);
1406 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1407 &dev->dev.kobj, "pool%d", i);
1408 if (!error)
1409 kobject_uevent(kobj, KOBJ_ADD);
1410 }
1411
1412 netdev_dbg(netdev, "adapter @ 0x%p\n", adapter);
1413
1414 adapter->buffer_list_dma = DMA_ERROR_CODE;
1415 adapter->filter_list_dma = DMA_ERROR_CODE;
1416 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1417
1418 netdev_dbg(netdev, "registering netdev...\n");
1419
1420 ibmveth_set_features(netdev, netdev->features);
1421
1422 rc = register_netdev(netdev);
1423
1424 if (rc) {
1425 netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc);
1426 free_netdev(netdev);
1427 return rc;
1428 }
1429
1430 netdev_dbg(netdev, "registered\n");
1431
1432 return 0;
1433}
1434
1435static int __devexit ibmveth_remove(struct vio_dev *dev)
1436{
1437 struct net_device *netdev = dev_get_drvdata(&dev->dev);
1438 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1439 int i;
1440
1441 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
1442 kobject_put(&adapter->rx_buff_pool[i].kobj);
1443
1444 unregister_netdev(netdev);
1445
1446 free_netdev(netdev);
1447 dev_set_drvdata(&dev->dev, NULL);
1448
1449 return 0;
1450}
1451
1452static struct attribute veth_active_attr;
1453static struct attribute veth_num_attr;
1454static struct attribute veth_size_attr;
1455
1456static 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
1472static 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 netdev_err(netdev,
1489 "unable to alloc pool\n");
1490 return -ENOMEM;
1491 }
1492 pool->active = 1;
1493 adapter->pool_config = 1;
1494 ibmveth_close(netdev);
1495 adapter->pool_config = 0;
1496 if ((rc = ibmveth_open(netdev)))
1497 return rc;
1498 } else {
1499 pool->active = 1;
1500 }
1501 } else if (!value && pool->active) {
1502 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1503 int i;
1504 /* Make sure there is a buffer pool with buffers that
1505 can hold a packet of the size of the MTU */
1506 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1507 if (pool == &adapter->rx_buff_pool[i])
1508 continue;
1509 if (!adapter->rx_buff_pool[i].active)
1510 continue;
1511 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1512 break;
1513 }
1514
1515 if (i == IBMVETH_NUM_BUFF_POOLS) {
1516 netdev_err(netdev, "no active pool >= MTU\n");
1517 return -EPERM;
1518 }
1519
1520 if (netif_running(netdev)) {
1521 adapter->pool_config = 1;
1522 ibmveth_close(netdev);
1523 pool->active = 0;
1524 adapter->pool_config = 0;
1525 if ((rc = ibmveth_open(netdev)))
1526 return rc;
1527 }
1528 pool->active = 0;
1529 }
1530 } else if (attr == &veth_num_attr) {
1531 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) {
1532 return -EINVAL;
1533 } else {
1534 if (netif_running(netdev)) {
1535 adapter->pool_config = 1;
1536 ibmveth_close(netdev);
1537 adapter->pool_config = 0;
1538 pool->size = value;
1539 if ((rc = ibmveth_open(netdev)))
1540 return rc;
1541 } else {
1542 pool->size = value;
1543 }
1544 }
1545 } else if (attr == &veth_size_attr) {
1546 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) {
1547 return -EINVAL;
1548 } else {
1549 if (netif_running(netdev)) {
1550 adapter->pool_config = 1;
1551 ibmveth_close(netdev);
1552 adapter->pool_config = 0;
1553 pool->buff_size = value;
1554 if ((rc = ibmveth_open(netdev)))
1555 return rc;
1556 } else {
1557 pool->buff_size = value;
1558 }
1559 }
1560 }
1561
1562 /* kick the interrupt handler to allocate/deallocate pools */
1563 ibmveth_interrupt(netdev->irq, netdev);
1564 return count;
1565}
1566
1567
1568#define ATTR(_name, _mode) \
1569 struct attribute veth_##_name##_attr = { \
1570 .name = __stringify(_name), .mode = _mode, \
1571 };
1572
1573static ATTR(active, 0644);
1574static ATTR(num, 0644);
1575static ATTR(size, 0644);
1576
1577static struct attribute *veth_pool_attrs[] = {
1578 &veth_active_attr,
1579 &veth_num_attr,
1580 &veth_size_attr,
1581 NULL,
1582};
1583
1584static const struct sysfs_ops veth_pool_ops = {
1585 .show = veth_pool_show,
1586 .store = veth_pool_store,
1587};
1588
1589static struct kobj_type ktype_veth_pool = {
1590 .release = NULL,
1591 .sysfs_ops = &veth_pool_ops,
1592 .default_attrs = veth_pool_attrs,
1593};
1594
1595static int ibmveth_resume(struct device *dev)
1596{
1597 struct net_device *netdev = dev_get_drvdata(dev);
1598 ibmveth_interrupt(netdev->irq, netdev);
1599 return 0;
1600}
1601
1602static struct vio_device_id ibmveth_device_table[] __devinitdata = {
1603 { "network", "IBM,l-lan"},
1604 { "", "" }
1605};
1606MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1607
1608static struct dev_pm_ops ibmveth_pm_ops = {
1609 .resume = ibmveth_resume
1610};
1611
1612static struct vio_driver ibmveth_driver = {
1613 .id_table = ibmveth_device_table,
1614 .probe = ibmveth_probe,
1615 .remove = ibmveth_remove,
1616 .get_desired_dma = ibmveth_get_desired_dma,
1617 .driver = {
1618 .name = ibmveth_driver_name,
1619 .owner = THIS_MODULE,
1620 .pm = &ibmveth_pm_ops,
1621 }
1622};
1623
1624static int __init ibmveth_module_init(void)
1625{
1626 printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name,
1627 ibmveth_driver_string, ibmveth_driver_version);
1628
1629 return vio_register_driver(&ibmveth_driver);
1630}
1631
1632static void __exit ibmveth_module_exit(void)
1633{
1634 vio_unregister_driver(&ibmveth_driver);
1635}
1636
1637module_init(ibmveth_module_init);
1638module_exit(ibmveth_module_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-04 02:52:33 -0400