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[B44]: port to native ssb support
[linux-2.6-block.git] / drivers / net / ibmveth.c
CommitLineData
1da177e4
LT		 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. */
d7fbeba6 27/* */
1da177e4
LT		 28/**************************************************************************/
29/*
30 TODO:
1da177e4
LT		 31 - add support for sysfs
32 - possibly remove procfs support
33*/
34
1da177e4 35#include <linux/module.h>
1da177e4
LT		 36#include <linux/types.h>
37#include <linux/errno.h>
38#include <linux/ioport.h>
39#include <linux/dma-mapping.h>
40#include <linux/kernel.h>
41#include <linux/netdevice.h>
42#include <linux/etherdevice.h>
43#include <linux/skbuff.h>
44#include <linux/init.h>
45#include <linux/delay.h>
46#include <linux/mm.h>
47#include <linux/ethtool.h>
48#include <linux/proc_fs.h>
f4ff2872
BK		 49#include <linux/in.h>
50#include <linux/ip.h>
457c4cbc 51#include <net/net_namespace.h>
1da177e4
LT		 52#include <asm/semaphore.h>
53#include <asm/hvcall.h>
54#include <asm/atomic.h>
1da177e4
LT		 55#include <asm/vio.h>
56#include <asm/uaccess.h>
57#include <linux/seq_file.h>
58
59#include "ibmveth.h"
60
6af37fa9 61#undef DEBUG
1da177e4
LT		 62
63#define ibmveth_printk(fmt, args...) \
f98baffb 64 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
1da177e4
LT		 65
66#define ibmveth_error_printk(fmt, args...) \
67 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
68
69#ifdef DEBUG
70#define ibmveth_debug_printk_no_adapter(fmt, args...) \
71 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
72#define ibmveth_debug_printk(fmt, args...) \
73 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
74#define ibmveth_assert(expr) \
75 if(!(expr)) { \
76 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
77 BUG(); \
78 }
79#else
80#define ibmveth_debug_printk_no_adapter(fmt, args...)
81#define ibmveth_debug_printk(fmt, args...)
d7fbeba6 82#define ibmveth_assert(expr)
1da177e4
LT		 83#endif
84
85static int ibmveth_open(struct net_device *dev);
86static int ibmveth_close(struct net_device *dev);
87static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
bea3348e 88static int ibmveth_poll(struct napi_struct *napi, int budget);
1da177e4 89static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
1da177e4
LT		 90static void ibmveth_set_multicast_list(struct net_device *dev);
91static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
92static void ibmveth_proc_register_driver(void);
93static void ibmveth_proc_unregister_driver(void);
94static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
95static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
7d12e780 96static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
493a684a 97static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
860f242e 98static struct kobj_type ktype_veth_pool;
1da177e4
LT		 99
100#ifdef CONFIG_PROC_FS
457c4cbc 101#define IBMVETH_PROC_DIR "ibmveth"
1da177e4
LT		 102static struct proc_dir_entry *ibmveth_proc_dir;
103#endif
104
105static const char ibmveth_driver_name[] = "ibmveth";
106static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
107#define ibmveth_driver_version "1.03"
108
109MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
110MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
111MODULE_LICENSE("GPL");
112MODULE_VERSION(ibmveth_driver_version);
113
ddbb4de9
BK		 114struct ibmveth_stat {
115 char name[ETH_GSTRING_LEN];
116 int offset;
117};
118
119#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
120#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
121
122struct ibmveth_stat ibmveth_stats[] = {
123 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
124 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
125 { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
126 { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
127 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
128 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
ddbb4de9
BK		 129 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
130 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
131};
132
1da177e4 133/* simple methods of getting data from the current rxq entry */
79ef4a4d
BK		 134static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
135{
136 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
137}
138
139static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
140{
141 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
142}
143
1da177e4
LT		 144static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
145{
79ef4a4d 146 return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
1da177e4
LT		 147}
148
149static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
150{
79ef4a4d 151 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
1da177e4
LT		 152}
153
154static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
155{
79ef4a4d 156 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
1da177e4
LT		 157}
158
159static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
160{
161 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
162}
163
f4ff2872
BK		 164static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
165{
79ef4a4d 166 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
f4ff2872
BK		 167}
168
1da177e4 169/* setup the initial settings for a buffer pool */
860f242e 170static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
1da177e4
LT		 171{
172 pool->size = pool_size;
173 pool->index = pool_index;
174 pool->buff_size = buff_size;
175 pool->threshold = pool_size / 2;
860f242e 176 pool->active = pool_active;
1da177e4
LT		 177}
178
179/* allocate and setup an buffer pool - called during open */
180static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
181{
182 int i;
183
d7fbeba6 184 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
1da177e4
LT		 185
186 if(!pool->free_map) {
187 return -1;
188 }
189
d7fbeba6 190 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
1da177e4
LT		 191 if(!pool->dma_addr) {
192 kfree(pool->free_map);
193 pool->free_map = NULL;
194 return -1;
195 }
196
197 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
198
199 if(!pool->skbuff) {
200 kfree(pool->dma_addr);
201 pool->dma_addr = NULL;
202
203 kfree(pool->free_map);
204 pool->free_map = NULL;
205 return -1;
206 }
207
208 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
209 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
210
211 for(i = 0; i < pool->size; ++i) {
212 pool->free_map[i] = i;
213 }
214
215 atomic_set(&pool->available, 0);
216 pool->producer_index = 0;
217 pool->consumer_index = 0;
218
219 return 0;
220}
221
222/* replenish the buffers for a pool. note that we don't need to
223 * skb_reserve these since they are used for incoming...
224 */
225static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
226{
227 u32 i;
228 u32 count = pool->size - atomic_read(&pool->available);
229 u32 buffers_added = 0;
230
231 mb();
232
233 for(i = 0; i < count; ++i) {
234 struct sk_buff *skb;
235 unsigned int free_index, index;
236 u64 correlator;
237 union ibmveth_buf_desc desc;
238 unsigned long lpar_rc;
239 dma_addr_t dma_addr;
240
241 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
242
243 if(!skb) {
244 ibmveth_debug_printk("replenish: unable to allocate skb\n");
245 adapter->replenish_no_mem++;
246 break;
247 }
248
047a66d4
DG		 249 free_index = pool->consumer_index;
250 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
1da177e4 251 index = pool->free_map[free_index];
d7fbeba6 252
1da177e4
LT		 253 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
254 ibmveth_assert(pool->skbuff[index] == NULL);
255
256 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
257 pool->buff_size, DMA_FROM_DEVICE);
258
259 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
260 pool->dma_addr[index] = dma_addr;
261 pool->skbuff[index] = skb;
262
263 correlator = ((u64)pool->index << 32) | index;
264 *(u64*)skb->data = correlator;
265
79ef4a4d 266 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
d7fbeba6 267 desc.fields.address = dma_addr;
1da177e4
LT		 268
269 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
d7fbeba6 270
706c8c93 271 if(lpar_rc != H_SUCCESS) {
82702d37 272 pool->free_map[free_index] = index;
1da177e4 273 pool->skbuff[index] = NULL;
751ae21c
SL		 274 if (pool->consumer_index == 0)
275 pool->consumer_index = pool->size - 1;
276 else
277 pool->consumer_index--;
1da177e4
LT		 278 dma_unmap_single(&adapter->vdev->dev,
279 pool->dma_addr[index], pool->buff_size,
280 DMA_FROM_DEVICE);
281 dev_kfree_skb_any(skb);
282 adapter->replenish_add_buff_failure++;
283 break;
284 } else {
285 buffers_added++;
286 adapter->replenish_add_buff_success++;
287 }
288 }
d7fbeba6 289
1da177e4
LT		 290 mb();
291 atomic_add(buffers_added, &(pool->available));
292}
293
e2adbcb4 294/* replenish routine */
d7fbeba6 295static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
1da177e4 296{
b6d35182
SL		 297 int i;
298
1da177e4
LT		 299 adapter->replenish_task_cycles++;
300
b6d35182
SL		 301 for(i = 0; i < IbmVethNumBufferPools; i++)
302 if(adapter->rx_buff_pool[i].active)
d7fbeba6 303 ibmveth_replenish_buffer_pool(adapter,
b6d35182 304 &adapter->rx_buff_pool[i]);
1da177e4
LT		 305
306 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
1da177e4
LT		 307}
308
309/* empty and free ana buffer pool - also used to do cleanup in error paths */
310static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
311{
312 int i;
313
b4558ea9
JJ		 314 kfree(pool->free_map);
315 pool->free_map = NULL;
1da177e4
LT		 316
317 if(pool->skbuff && pool->dma_addr) {
318 for(i = 0; i < pool->size; ++i) {
319 struct sk_buff *skb = pool->skbuff[i];
320 if(skb) {
321 dma_unmap_single(&adapter->vdev->dev,
322 pool->dma_addr[i],
323 pool->buff_size,
324 DMA_FROM_DEVICE);
325 dev_kfree_skb_any(skb);
326 pool->skbuff[i] = NULL;
327 }
328 }
329 }
330
331 if(pool->dma_addr) {
332 kfree(pool->dma_addr);
333 pool->dma_addr = NULL;
334 }
335
336 if(pool->skbuff) {
337 kfree(pool->skbuff);
338 pool->skbuff = NULL;
339 }
340}
341
342/* remove a buffer from a pool */
343static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
344{
345 unsigned int pool = correlator >> 32;
346 unsigned int index = correlator & 0xffffffffUL;
347 unsigned int free_index;
348 struct sk_buff *skb;
349
350 ibmveth_assert(pool < IbmVethNumBufferPools);
351 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
352
353 skb = adapter->rx_buff_pool[pool].skbuff[index];
354
355 ibmveth_assert(skb != NULL);
356
357 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
358
359 dma_unmap_single(&adapter->vdev->dev,
360 adapter->rx_buff_pool[pool].dma_addr[index],
361 adapter->rx_buff_pool[pool].buff_size,
362 DMA_FROM_DEVICE);
363
047a66d4
DG		 364 free_index = adapter->rx_buff_pool[pool].producer_index;
365 adapter->rx_buff_pool[pool].producer_index
366 = (adapter->rx_buff_pool[pool].producer_index + 1)
367 % adapter->rx_buff_pool[pool].size;
1da177e4
LT		 368 adapter->rx_buff_pool[pool].free_map[free_index] = index;
369
370 mb();
371
372 atomic_dec(&(adapter->rx_buff_pool[pool].available));
373}
374
375/* get the current buffer on the rx queue */
376static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
377{
378 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
379 unsigned int pool = correlator >> 32;
380 unsigned int index = correlator & 0xffffffffUL;
381
382 ibmveth_assert(pool < IbmVethNumBufferPools);
383 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
384
385 return adapter->rx_buff_pool[pool].skbuff[index];
386}
387
388/* recycle the current buffer on the rx queue */
389static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
390{
391 u32 q_index = adapter->rx_queue.index;
392 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
393 unsigned int pool = correlator >> 32;
394 unsigned int index = correlator & 0xffffffffUL;
395 union ibmveth_buf_desc desc;
396 unsigned long lpar_rc;
397
398 ibmveth_assert(pool < IbmVethNumBufferPools);
399 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
400
b6d35182
SL		 401 if(!adapter->rx_buff_pool[pool].active) {
402 ibmveth_rxq_harvest_buffer(adapter);
403 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
404 return;
405 }
406
79ef4a4d
BK		 407 desc.fields.flags_len = IBMVETH_BUF_VALID |
408 adapter->rx_buff_pool[pool].buff_size;
1da177e4
LT		 409 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
410
411 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
d7fbeba6 412
706c8c93 413 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 414 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
415 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
416 }
417
418 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
419 adapter->rx_queue.index = 0;
420 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
421 }
422}
423
493a684a 424static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
1da177e4
LT		 425{
426 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
427
428 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
429 adapter->rx_queue.index = 0;
430 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
431 }
432}
433
434static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
435{
b6d35182
SL		 436 int i;
437
1da177e4
LT		 438 if(adapter->buffer_list_addr != NULL) {
439 if(!dma_mapping_error(adapter->buffer_list_dma)) {
440 dma_unmap_single(&adapter->vdev->dev,
441 adapter->buffer_list_dma, 4096,
442 DMA_BIDIRECTIONAL);
443 adapter->buffer_list_dma = DMA_ERROR_CODE;
444 }
445 free_page((unsigned long)adapter->buffer_list_addr);
446 adapter->buffer_list_addr = NULL;
d7fbeba6 447 }
1da177e4
LT		 448
449 if(adapter->filter_list_addr != NULL) {
450 if(!dma_mapping_error(adapter->filter_list_dma)) {
451 dma_unmap_single(&adapter->vdev->dev,
452 adapter->filter_list_dma, 4096,
453 DMA_BIDIRECTIONAL);
454 adapter->filter_list_dma = DMA_ERROR_CODE;
455 }
456 free_page((unsigned long)adapter->filter_list_addr);
457 adapter->filter_list_addr = NULL;
458 }
459
460 if(adapter->rx_queue.queue_addr != NULL) {
461 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
462 dma_unmap_single(&adapter->vdev->dev,
463 adapter->rx_queue.queue_dma,
464 adapter->rx_queue.queue_len,
465 DMA_BIDIRECTIONAL);
466 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
467 }
468 kfree(adapter->rx_queue.queue_addr);
469 adapter->rx_queue.queue_addr = NULL;
470 }
471
b6d35182 472 for(i = 0; i<IbmVethNumBufferPools; i++)
860f242e 473 if (adapter->rx_buff_pool[i].active)
d7fbeba6 474 ibmveth_free_buffer_pool(adapter,
860f242e 475 &adapter->rx_buff_pool[i]);
1da177e4
LT		 476}
477
bbedefcc
ME		 478static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
479 union ibmveth_buf_desc rxq_desc, u64 mac_address)
480{
481 int rc, try_again = 1;
482
483 /* After a kexec the adapter will still be open, so our attempt to
484 * open it will fail. So if we get a failure we free the adapter and
485 * try again, but only once. */
486retry:
487 rc = h_register_logical_lan(adapter->vdev->unit_address,
488 adapter->buffer_list_dma, rxq_desc.desc,
489 adapter->filter_list_dma, mac_address);
490
491 if (rc != H_SUCCESS && try_again) {
492 do {
493 rc = h_free_logical_lan(adapter->vdev->unit_address);
494 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
495
496 try_again = 0;
497 goto retry;
498 }
499
500 return rc;
501}
502
1da177e4
LT		 503static int ibmveth_open(struct net_device *netdev)
504{
505 struct ibmveth_adapter *adapter = netdev->priv;
506 u64 mac_address = 0;
b6d35182 507 int rxq_entries = 1;
1da177e4
LT		 508 unsigned long lpar_rc;
509 int rc;
510 union ibmveth_buf_desc rxq_desc;
b6d35182 511 int i;
1da177e4
LT		 512
513 ibmveth_debug_printk("open starting\n");
514
bea3348e
SH		 515 napi_enable(&adapter->napi);
516
b6d35182
SL		 517 for(i = 0; i<IbmVethNumBufferPools; i++)
518 rxq_entries += adapter->rx_buff_pool[i].size;
d7fbeba6 519
1da177e4
LT		 520 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
521 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
d7fbeba6 522
1da177e4
LT		 523 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
524 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
525 ibmveth_cleanup(adapter);
bea3348e 526 napi_disable(&adapter->napi);
1da177e4
LT		 527 return -ENOMEM;
528 }
529
530 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
531 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
532
533 if(!adapter->rx_queue.queue_addr) {
534 ibmveth_error_printk("unable to allocate rx queue pages\n");
535 ibmveth_cleanup(adapter);
bea3348e 536 napi_disable(&adapter->napi);
1da177e4
LT		 537 return -ENOMEM;
538 }
539
540 adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
541 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
542 adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
543 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
544 adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
545 adapter->rx_queue.queue_addr,
546 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
547
548 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
549 (dma_mapping_error(adapter->filter_list_dma)) ||
550 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
551 ibmveth_error_printk("unable to map filter or buffer list pages\n");
552 ibmveth_cleanup(adapter);
bea3348e 553 napi_disable(&adapter->napi);
1da177e4
LT		 554 return -ENOMEM;
555 }
556
557 adapter->rx_queue.index = 0;
558 adapter->rx_queue.num_slots = rxq_entries;
559 adapter->rx_queue.toggle = 1;
560
1da177e4
LT		 561 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
562 mac_address = mac_address >> 16;
563
79ef4a4d 564 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
1da177e4
LT		 565 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
566
567 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
568 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
569 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
570
4347ef15
SL		 571 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
572
bbedefcc 573 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
1da177e4 574
706c8c93 575 if(lpar_rc != H_SUCCESS) {
1da177e4 576 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
8168f902 577 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
1da177e4
LT		 578 adapter->buffer_list_dma,
579 adapter->filter_list_dma,
580 rxq_desc.desc,
581 mac_address);
582 ibmveth_cleanup(adapter);
bea3348e 583 napi_disable(&adapter->napi);
d7fbeba6 584 return -ENONET;
1da177e4
LT		 585 }
586
860f242e
SL		 587 for(i = 0; i<IbmVethNumBufferPools; i++) {
588 if(!adapter->rx_buff_pool[i].active)
589 continue;
590 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
591 ibmveth_error_printk("unable to alloc pool\n");
592 adapter->rx_buff_pool[i].active = 0;
593 ibmveth_cleanup(adapter);
bea3348e 594 napi_disable(&adapter->napi);
860f242e
SL		 595 return -ENOMEM ;
596 }
597 }
598
1da177e4
LT		 599 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
600 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
601 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
602 do {
603 rc = h_free_logical_lan(adapter->vdev->unit_address);
706c8c93 604 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
1da177e4
LT		 605
606 ibmveth_cleanup(adapter);
bea3348e 607 napi_disable(&adapter->napi);
1da177e4
LT		 608 return rc;
609 }
610
e2adbcb4 611 ibmveth_debug_printk("initial replenish cycle\n");
7d12e780 612 ibmveth_interrupt(netdev->irq, netdev);
1da177e4 613
e2adbcb4 614 netif_start_queue(netdev);
1da177e4
LT		 615
616 ibmveth_debug_printk("open complete\n");
617
618 return 0;
619}
620
621static int ibmveth_close(struct net_device *netdev)
622{
623 struct ibmveth_adapter *adapter = netdev->priv;
624 long lpar_rc;
d7fbeba6 625
1da177e4
LT		 626 ibmveth_debug_printk("close starting\n");
627
bea3348e
SH		 628 napi_disable(&adapter->napi);
629
860f242e
SL		 630 if (!adapter->pool_config)
631 netif_stop_queue(netdev);
1da177e4
LT		 632
633 free_irq(netdev->irq, netdev);
634
1da177e4
LT		 635 do {
636 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
706c8c93 637 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
1da177e4 638
706c8c93 639 if(lpar_rc != H_SUCCESS)
1da177e4
LT		 640 {
641 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
642 lpar_rc);
643 }
644
645 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
646
647 ibmveth_cleanup(adapter);
648
649 ibmveth_debug_printk("close complete\n");
650
651 return 0;
652}
653
654static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
655 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
656 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
657 cmd->speed = SPEED_1000;
658 cmd->duplex = DUPLEX_FULL;
659 cmd->port = PORT_FIBRE;
660 cmd->phy_address = 0;
661 cmd->transceiver = XCVR_INTERNAL;
662 cmd->autoneg = AUTONEG_ENABLE;
663 cmd->maxtxpkt = 0;
664 cmd->maxrxpkt = 1;
665 return 0;
666}
667
668static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
669 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
670 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
671}
672
673static u32 netdev_get_link(struct net_device *dev) {
674 return 1;
675}
676
5fc7e01c
BK		 677static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
678{
679 struct ibmveth_adapter *adapter = dev->priv;
680
681 if (data)
682 adapter->rx_csum = 1;
683 else {
684 /*
685 * Since the ibmveth firmware interface does not have the concept of
686 * separate tx/rx checksum offload enable, if rx checksum is disabled
687 * we also have to disable tx checksum offload. Once we disable rx
688 * checksum offload, we are no longer allowed to send tx buffers that
689 * are not properly checksummed.
690 */
691 adapter->rx_csum = 0;
692 dev->features &= ~NETIF_F_IP_CSUM;
693 }
694}
695
696static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
697{
698 struct ibmveth_adapter *adapter = dev->priv;
699
700 if (data) {
701 dev->features |= NETIF_F_IP_CSUM;
702 adapter->rx_csum = 1;
703 } else
704 dev->features &= ~NETIF_F_IP_CSUM;
705}
706
707static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
708 void (*done) (struct net_device *, u32))
709{
710 struct ibmveth_adapter *adapter = dev->priv;
79ef4a4d 711 u64 set_attr, clr_attr, ret_attr;
5fc7e01c
BK		 712 long ret;
713 int rc1 = 0, rc2 = 0;
714 int restart = 0;
715
716 if (netif_running(dev)) {
717 restart = 1;
718 adapter->pool_config = 1;
719 ibmveth_close(dev);
720 adapter->pool_config = 0;
721 }
722
79ef4a4d
BK		 723 set_attr = 0;
724 clr_attr = 0;
5fc7e01c
BK		 725
726 if (data)
79ef4a4d 727 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
5fc7e01c 728 else
79ef4a4d 729 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
5fc7e01c 730
79ef4a4d 731 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
5fc7e01c 732
79ef4a4d
BK		 733 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
734 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
735 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
736 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
737 set_attr, &ret_attr);
5fc7e01c
BK		 738
739 if (ret != H_SUCCESS) {
740 rc1 = -EIO;
741 ibmveth_error_printk("unable to change checksum offload settings."
742 " %d rc=%ld\n", data, ret);
743
744 ret = h_illan_attributes(adapter->vdev->unit_address,
79ef4a4d 745 set_attr, clr_attr, &ret_attr);
5fc7e01c
BK		 746 } else
747 done(dev, data);
748 } else {
749 rc1 = -EIO;
750 ibmveth_error_printk("unable to change checksum offload settings."
79ef4a4d 751 " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
5fc7e01c
BK		 752 }
753
754 if (restart)
755 rc2 = ibmveth_open(dev);
756
757 return rc1 ? rc1 : rc2;
758}
759
760static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
761{
762 struct ibmveth_adapter *adapter = dev->priv;
763
764 if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
765 return 0;
766
767 return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
768}
769
770static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
771{
772 struct ibmveth_adapter *adapter = dev->priv;
773 int rc = 0;
774
775 if (data && (dev->features & NETIF_F_IP_CSUM))
776 return 0;
777 if (!data && !(dev->features & NETIF_F_IP_CSUM))
778 return 0;
779
780 if (data && !adapter->rx_csum)
781 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
782 else
783 ibmveth_set_tx_csum_flags(dev, data);
784
785 return rc;
786}
787
788static u32 ibmveth_get_rx_csum(struct net_device *dev)
789{
790 struct ibmveth_adapter *adapter = dev->priv;
791 return adapter->rx_csum;
792}
793
ddbb4de9
BK		 794static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
795{
796 int i;
797
798 if (stringset != ETH_SS_STATS)
799 return;
800
801 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
802 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
803}
804
805static int ibmveth_get_stats_count(struct net_device *dev)
806{
807 return ARRAY_SIZE(ibmveth_stats);
808}
809
810static void ibmveth_get_ethtool_stats(struct net_device *dev,
811 struct ethtool_stats *stats, u64 *data)
812{
813 int i;
814 struct ibmveth_adapter *adapter = dev->priv;
815
816 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
817 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
818}
819
7282d491 820static const struct ethtool_ops netdev_ethtool_ops = {
1da177e4
LT		 821 .get_drvinfo = netdev_get_drvinfo,
822 .get_settings = netdev_get_settings,
823 .get_link = netdev_get_link,
5fc7e01c
BK		 824 .set_tx_csum = ibmveth_set_tx_csum,
825 .get_rx_csum = ibmveth_get_rx_csum,
826 .set_rx_csum = ibmveth_set_rx_csum,
ddbb4de9 827 .get_strings = ibmveth_get_strings,
88d3aafd 828 .get_stats_count = ibmveth_get_stats_count,
ddbb4de9 829 .get_ethtool_stats = ibmveth_get_ethtool_stats,
1da177e4
LT		 830};
831
832static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
833{
834 return -EOPNOTSUPP;
835}
836
837#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
838
839static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
840{
841 struct ibmveth_adapter *adapter = netdev->priv;
3449a2ab 842 union ibmveth_buf_desc desc;
1da177e4 843 unsigned long lpar_rc;
1da177e4 844 unsigned long correlator;
60296d9e 845 unsigned long flags;
1da177e4 846 unsigned int retry_count;
60296d9e
SL		 847 unsigned int tx_dropped = 0;
848 unsigned int tx_bytes = 0;
849 unsigned int tx_packets = 0;
850 unsigned int tx_send_failed = 0;
851 unsigned int tx_map_failed = 0;
852
79ef4a4d 853 desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
3449a2ab 854 desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
79ef4a4d 855 skb->len, DMA_TO_DEVICE);
1da177e4 856
f4ff2872
BK		 857 if (skb->ip_summed == CHECKSUM_PARTIAL &&
858 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
859 ibmveth_error_printk("tx: failed to checksum packet\n");
860 tx_dropped++;
861 goto out;
862 }
863
864 if (skb->ip_summed == CHECKSUM_PARTIAL) {
865 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
866
79ef4a4d 867 desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
f4ff2872
BK		 868
869 /* Need to zero out the checksum */
870 buf[0] = 0;
871 buf[1] = 0;
872 }
873
3449a2ab
BK		 874 if (dma_mapping_error(desc.fields.address)) {
875 ibmveth_error_printk("tx: unable to map xmit buffer\n");
60296d9e
SL		 876 tx_map_failed++;
877 tx_dropped++;
878 goto out;
1da177e4
LT		 879 }
880
1da177e4
LT		 881 /* send the frame. Arbitrarily set retrycount to 1024 */
882 correlator = 0;
883 retry_count = 1024;
884 do {
885 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
3449a2ab
BK		 886 desc.desc, 0, 0, 0, 0, 0,
887 correlator, &correlator);
706c8c93 888 } while ((lpar_rc == H_BUSY) && (retry_count--));
d7fbeba6 889
706c8c93 890 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
1da177e4 891 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
3449a2ab 892 ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
79ef4a4d
BK		 893 (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
894 skb->len, desc.fields.address);
60296d9e
SL		 895 tx_send_failed++;
896 tx_dropped++;
1da177e4 897 } else {
60296d9e
SL		 898 tx_packets++;
899 tx_bytes += skb->len;
0abe791e 900 netdev->trans_start = jiffies;
1da177e4
LT		 901 }
902
3449a2ab 903 dma_unmap_single(&adapter->vdev->dev, desc.fields.address,
79ef4a4d 904 skb->len, DMA_TO_DEVICE);
1da177e4 905
60296d9e 906out: spin_lock_irqsave(&adapter->stats_lock, flags);
09f75cd7
JG		 907 netdev->stats.tx_dropped += tx_dropped;
908 netdev->stats.tx_bytes += tx_bytes;
909 netdev->stats.tx_packets += tx_packets;
60296d9e
SL		 910 adapter->tx_send_failed += tx_send_failed;
911 adapter->tx_map_failed += tx_map_failed;
912 spin_unlock_irqrestore(&adapter->stats_lock, flags);
913
1da177e4
LT		 914 dev_kfree_skb(skb);
915 return 0;
916}
917
bea3348e 918static int ibmveth_poll(struct napi_struct *napi, int budget)
1da177e4 919{
bea3348e
SH		 920 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
921 struct net_device *netdev = adapter->netdev;
1da177e4 922 int frames_processed = 0;
1da177e4
LT		 923 unsigned long lpar_rc;
924
925 restart_poll:
926 do {
bea3348e 927 struct sk_buff *skb;
1da177e4 928
bea3348e
SH		 929 if (!ibmveth_rxq_pending_buffer(adapter))
930 break;
1da177e4 931
bea3348e
SH		 932 rmb();
933 if (!ibmveth_rxq_buffer_valid(adapter)) {
934 wmb(); /* suggested by larson1 */
935 adapter->rx_invalid_buffer++;
936 ibmveth_debug_printk("recycling invalid buffer\n");
937 ibmveth_rxq_recycle_buffer(adapter);
938 } else {
939 int length = ibmveth_rxq_frame_length(adapter);
940 int offset = ibmveth_rxq_frame_offset(adapter);
f4ff2872
BK		 941 int csum_good = ibmveth_rxq_csum_good(adapter);
942
bea3348e 943 skb = ibmveth_rxq_get_buffer(adapter);
f4ff2872
BK		 944 if (csum_good)
945 skb->ip_summed = CHECKSUM_UNNECESSARY;
1da177e4 946
bea3348e 947 ibmveth_rxq_harvest_buffer(adapter);
1da177e4 948
bea3348e
SH		 949 skb_reserve(skb, offset);
950 skb_put(skb, length);
951 skb->protocol = eth_type_trans(skb, netdev);
1da177e4 952
bea3348e 953 netif_receive_skb(skb); /* send it up */
1da177e4 954
09f75cd7
JG		 955 netdev->stats.rx_packets++;
956 netdev->stats.rx_bytes += length;
bea3348e
SH		 957 frames_processed++;
958 netdev->last_rx = jiffies;
1da177e4 959 }
bea3348e 960 } while (frames_processed < budget);
1da177e4 961
e2adbcb4 962 ibmveth_replenish_task(adapter);
1da177e4 963
bea3348e
SH		 964 if (frames_processed < budget) {
965 /* We think we are done - reenable interrupts,
966 * then check once more to make sure we are done.
967 */
968 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
969 VIO_IRQ_ENABLE);
1da177e4 970
bea3348e 971 ibmveth_assert(lpar_rc == H_SUCCESS);
1da177e4 972
bea3348e 973 netif_rx_complete(netdev, napi);
1da177e4 974
bea3348e
SH		 975 if (ibmveth_rxq_pending_buffer(adapter) &&
976 netif_rx_reschedule(netdev, napi)) {
977 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
978 VIO_IRQ_DISABLE);
979 goto restart_poll;
980 }
1da177e4
LT		 981 }
982
bea3348e 983 return frames_processed;
1da177e4
LT		 984}
985
7d12e780 986static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
d7fbeba6 987{
1da177e4
LT		 988 struct net_device *netdev = dev_instance;
989 struct ibmveth_adapter *adapter = netdev->priv;
990 unsigned long lpar_rc;
991
bea3348e
SH		 992 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
993 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
994 VIO_IRQ_DISABLE);
706c8c93 995 ibmveth_assert(lpar_rc == H_SUCCESS);
bea3348e 996 __netif_rx_schedule(netdev, &adapter->napi);
1da177e4
LT		 997 }
998 return IRQ_HANDLED;
999}
1000
1da177e4
LT		 1001static void ibmveth_set_multicast_list(struct net_device *netdev)
1002{
1003 struct ibmveth_adapter *adapter = netdev->priv;
1004 unsigned long lpar_rc;
1005
1006 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
1007 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1008 IbmVethMcastEnableRecv |
1009 IbmVethMcastDisableFiltering,
1010 0);
706c8c93 1011 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 1012 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1013 }
1014 } else {
1015 struct dev_mc_list *mclist = netdev->mc_list;
1016 int i;
1017 /* clear the filter table & disable filtering */
1018 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1019 IbmVethMcastEnableRecv |
1020 IbmVethMcastDisableFiltering |
1021 IbmVethMcastClearFilterTable,
1022 0);
706c8c93 1023 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 1024 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1025 }
1026 /* add the addresses to the filter table */
1027 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
1028 // add the multicast address to the filter table
1029 unsigned long mcast_addr = 0;
1030 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
1031 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1032 IbmVethMcastAddFilter,
1033 mcast_addr);
706c8c93 1034 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 1035 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1036 }
1037 }
d7fbeba6 1038
1da177e4
LT		 1039 /* re-enable filtering */
1040 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1041 IbmVethMcastEnableFiltering,
1042 0);
706c8c93 1043 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 1044 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1045 }
1046 }
1047}
1048
1049static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1050{
b6d35182 1051 struct ibmveth_adapter *adapter = dev->priv;
860f242e 1052 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
ce6eea58
BK		 1053 int reinit = 0;
1054 int i, rc;
b6d35182 1055
860f242e 1056 if (new_mtu < IBMVETH_MAX_MTU)
1da177e4 1057 return -EINVAL;
b6d35182 1058
ce6eea58
BK		 1059 for (i = 0; i < IbmVethNumBufferPools; i++)
1060 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1061 break;
1062
1063 if (i == IbmVethNumBufferPools)
1064 return -EINVAL;
1065
860f242e 1066 /* Look for an active buffer pool that can hold the new MTU */
b6d35182 1067 for(i = 0; i<IbmVethNumBufferPools; i++) {
ce6eea58
BK		 1068 if (!adapter->rx_buff_pool[i].active) {
1069 adapter->rx_buff_pool[i].active = 1;
1070 reinit = 1;
1071 }
1072
860f242e 1073 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
ce6eea58
BK		 1074 if (reinit && netif_running(adapter->netdev)) {
1075 adapter->pool_config = 1;
1076 ibmveth_close(adapter->netdev);
1077 adapter->pool_config = 0;
1078 dev->mtu = new_mtu;
1079 if ((rc = ibmveth_open(adapter->netdev)))
1080 return rc;
1081 } else
1082 dev->mtu = new_mtu;
860f242e 1083 return 0;
b6d35182 1084 }
b6d35182 1085 }
860f242e 1086 return -EINVAL;
1da177e4
LT		 1087}
1088
6b422374
SL		 1089#ifdef CONFIG_NET_POLL_CONTROLLER
1090static void ibmveth_poll_controller(struct net_device *dev)
1091{
1092 ibmveth_replenish_task(dev->priv);
5f77113c 1093 ibmveth_interrupt(dev->irq, dev);
6b422374
SL		 1094}
1095#endif
1096
1da177e4
LT		 1097static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1098{
b6d35182 1099 int rc, i;
f4ff2872 1100 long ret;
1da177e4 1101 struct net_device *netdev;
9dc83afd 1102 struct ibmveth_adapter *adapter;
79ef4a4d 1103 u64 set_attr, ret_attr;
1da177e4
LT		 1104
1105 unsigned char *mac_addr_p;
1106 unsigned int *mcastFilterSize_p;
1107
1108
d7fbeba6 1109 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1da177e4
LT		 1110 dev->unit_address);
1111
493a684a
ME		 1112 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1113 VETH_MAC_ADDR, NULL);
1da177e4
LT		 1114 if(!mac_addr_p) {
1115 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1116 "attribute\n", __FILE__, __LINE__);
1117 return 0;
1118 }
d7fbeba6 1119
493a684a
ME		 1120 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1121 VETH_MCAST_FILTER_SIZE, NULL);
1da177e4
LT		 1122 if(!mcastFilterSize_p) {
1123 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1124 "VETH_MCAST_FILTER_SIZE attribute\n",
1125 __FILE__, __LINE__);
1126 return 0;
1127 }
d7fbeba6 1128
1da177e4
LT		 1129 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1130
1131 if(!netdev)
1132 return -ENOMEM;
1133
1da177e4 1134 adapter = netdev->priv;
1da177e4
LT		 1135 dev->dev.driver_data = netdev;
1136
1137 adapter->vdev = dev;
1138 adapter->netdev = netdev;
1139 adapter->mcastFilterSize= *mcastFilterSize_p;
860f242e 1140 adapter->pool_config = 0;
d7fbeba6 1141
bea3348e
SH		 1142 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1143
1da177e4 1144 /* Some older boxes running PHYP non-natively have an OF that
d7fbeba6 1145 returns a 8-byte local-mac-address field (and the first
1da177e4 1146 2 bytes have to be ignored) while newer boxes' OF return
d7fbeba6 1147 a 6-byte field. Note that IEEE 1275 specifies that
1da177e4 1148 local-mac-address must be a 6-byte field.
d7fbeba6 1149 The RPA doc specifies that the first byte must be 10b, so
1da177e4
LT		 1150 we'll just look for it to solve this 8 vs. 6 byte field issue */
1151
1152 if ((*mac_addr_p & 0x3) != 0x02)
1153 mac_addr_p += 2;
1154
1155 adapter->mac_addr = 0;
1156 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1157
1da177e4
LT		 1158 netdev->irq = dev->irq;
1159 netdev->open = ibmveth_open;
1da177e4
LT		 1160 netdev->stop = ibmveth_close;
1161 netdev->hard_start_xmit = ibmveth_start_xmit;
1da177e4
LT		 1162 netdev->set_multicast_list = ibmveth_set_multicast_list;
1163 netdev->do_ioctl = ibmveth_ioctl;
1164 netdev->ethtool_ops = &netdev_ethtool_ops;
1165 netdev->change_mtu = ibmveth_change_mtu;
1166 SET_NETDEV_DEV(netdev, &dev->dev);
6b422374
SL		 1167#ifdef CONFIG_NET_POLL_CONTROLLER
1168 netdev->poll_controller = ibmveth_poll_controller;
1169#endif
d7fbeba6 1170 netdev->features |= NETIF_F_LLTX;
60296d9e 1171 spin_lock_init(&adapter->stats_lock);
1da177e4
LT		 1172
1173 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1174
860f242e
SL		 1175 for(i = 0; i<IbmVethNumBufferPools; i++) {
1176 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
d7fbeba6
JG		 1177 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1178 pool_count[i], pool_size[i],
860f242e
SL		 1179 pool_active[i]);
1180 kobj->parent = &dev->dev.kobj;
1181 sprintf(kobj->name, "pool%d", i);
1182 kobj->ktype = &ktype_veth_pool;
1183 kobject_register(kobj);
1184 }
1da177e4
LT		 1185
1186 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1187
1da177e4
LT		 1188 adapter->buffer_list_dma = DMA_ERROR_CODE;
1189 adapter->filter_list_dma = DMA_ERROR_CODE;
1190 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1191
1da177e4
LT		 1192 ibmveth_debug_printk("registering netdev...\n");
1193
79ef4a4d 1194 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
f4ff2872 1195
79ef4a4d
BK		 1196 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
1197 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
1198 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
1199 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
f4ff2872 1200
79ef4a4d 1201 ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
f4ff2872 1202
5fc7e01c
BK		 1203 if (ret == H_SUCCESS) {
1204 adapter->rx_csum = 1;
f4ff2872 1205 netdev->features |= NETIF_F_IP_CSUM;
5fc7e01c 1206 } else
79ef4a4d 1207 ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
f4ff2872
BK		 1208 }
1209
1da177e4
LT		 1210 rc = register_netdev(netdev);
1211
1212 if(rc) {
1213 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1214 free_netdev(netdev);
1215 return rc;
1216 }
1217
1218 ibmveth_debug_printk("registered\n");
1219
1220 ibmveth_proc_register_adapter(adapter);
1221
1222 return 0;
1223}
1224
1225static int __devexit ibmveth_remove(struct vio_dev *dev)
1226{
1227 struct net_device *netdev = dev->dev.driver_data;
1228 struct ibmveth_adapter *adapter = netdev->priv;
860f242e
SL		 1229 int i;
1230
1231 for(i = 0; i<IbmVethNumBufferPools; i++)
1232 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1da177e4
LT		 1233
1234 unregister_netdev(netdev);
1235
1236 ibmveth_proc_unregister_adapter(adapter);
1237
1238 free_netdev(netdev);
1239 return 0;
1240}
1241
1242#ifdef CONFIG_PROC_FS
1243static void ibmveth_proc_register_driver(void)
1244{
457c4cbc 1245 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1da177e4 1246 if (ibmveth_proc_dir) {
1da177e4
LT		 1247 }
1248}
1249
1250static void ibmveth_proc_unregister_driver(void)
1251{
457c4cbc 1252 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1da177e4
LT		 1253}
1254
d7fbeba6 1255static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1da177e4
LT		 1256{
1257 if (*pos == 0) {
1258 return (void *)1;
1259 } else {
1260 return NULL;
1261 }
1262}
1263
1264static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1265{
1266 ++*pos;
1267 return NULL;
1268}
1269
d7fbeba6 1270static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1da177e4
LT		 1271{
1272}
1273
d7fbeba6 1274static int ibmveth_seq_show(struct seq_file *seq, void *v)
1da177e4
LT		 1275{
1276 struct ibmveth_adapter *adapter = seq->private;
1277 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1278 char *firmware_mac = ((char*) &adapter->mac_addr) ;
0795af57 1279 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1280
1281 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
d7fbeba6 1282
1da177e4 1283 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
0795af57
JP		 1284 seq_printf(seq, "Current MAC: %s\n", print_mac(mac, current_mac));
1285 seq_printf(seq, "Firmware MAC: %s\n", print_mac(mac, firmware_mac));
d7fbeba6 1286
1da177e4 1287 seq_printf(seq, "\nAdapter Statistics:\n");
3449a2ab 1288 seq_printf(seq, " TX: vio_map_single failres: %ld\n", adapter->tx_map_failed);
1da177e4
LT		 1289 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1290 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1291 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1292 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1293 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1294 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
d7fbeba6 1295
1da177e4
LT		 1296 return 0;
1297}
1298static struct seq_operations ibmveth_seq_ops = {
1299 .start = ibmveth_seq_start,
1300 .next = ibmveth_seq_next,
1301 .stop = ibmveth_seq_stop,
1302 .show = ibmveth_seq_show,
1303};
1304
1305static int ibmveth_proc_open(struct inode *inode, struct file *file)
1306{
1307 struct seq_file *seq;
1308 struct proc_dir_entry *proc;
1309 int rc;
1310
1311 rc = seq_open(file, &ibmveth_seq_ops);
1312 if (!rc) {
1313 /* recover the pointer buried in proc_dir_entry data */
1314 seq = file->private_data;
1315 proc = PDE(inode);
1316 seq->private = proc->data;
1317 }
1318 return rc;
1319}
1320
d54b1fdb 1321static const struct file_operations ibmveth_proc_fops = {
1da177e4
LT		 1322 .owner = THIS_MODULE,
1323 .open = ibmveth_proc_open,
1324 .read = seq_read,
1325 .llseek = seq_lseek,
1326 .release = seq_release,
1327};
1328
1329static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1330{
1331 struct proc_dir_entry *entry;
1332 if (ibmveth_proc_dir) {
03a85d09
SL		 1333 char u_addr[10];
1334 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1335 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1da177e4
LT		 1336 if (!entry) {
1337 ibmveth_error_printk("Cannot create adapter proc entry");
1338 } else {
1339 entry->data = (void *) adapter;
1340 entry->proc_fops = &ibmveth_proc_fops;
1da177e4
LT		 1341 }
1342 }
1343 return;
1344}
1345
1346static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1347{
1348 if (ibmveth_proc_dir) {
03a85d09
SL		 1349 char u_addr[10];
1350 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1351 remove_proc_entry(u_addr, ibmveth_proc_dir);
1da177e4
LT		 1352 }
1353}
1354
1355#else /* CONFIG_PROC_FS */
d7fbeba6 1356static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1da177e4
LT		 1357{
1358}
1359
d7fbeba6 1360static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1da177e4
LT		 1361{
1362}
1363static void ibmveth_proc_register_driver(void)
1364{
1365}
1366
1367static void ibmveth_proc_unregister_driver(void)
1368{
1369}
1370#endif /* CONFIG_PROC_FS */
1371
860f242e
SL		 1372static struct attribute veth_active_attr;
1373static struct attribute veth_num_attr;
1374static struct attribute veth_size_attr;
1375
1376static ssize_t veth_pool_show(struct kobject * kobj,
1377 struct attribute * attr, char * buf)
1378{
d7fbeba6 1379 struct ibmveth_buff_pool *pool = container_of(kobj,
860f242e
SL		 1380 struct ibmveth_buff_pool,
1381 kobj);
1382
1383 if (attr == &veth_active_attr)
1384 return sprintf(buf, "%d\n", pool->active);
1385 else if (attr == &veth_num_attr)
1386 return sprintf(buf, "%d\n", pool->size);
1387 else if (attr == &veth_size_attr)
1388 return sprintf(buf, "%d\n", pool->buff_size);
1389 return 0;
1390}
1391
1392static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1393const char * buf, size_t count)
1394{
d7fbeba6 1395 struct ibmveth_buff_pool *pool = container_of(kobj,
860f242e
SL		 1396 struct ibmveth_buff_pool,
1397 kobj);
d7fbeba6 1398 struct net_device *netdev =
860f242e
SL		 1399 container_of(kobj->parent, struct device, kobj)->driver_data;
1400 struct ibmveth_adapter *adapter = netdev->priv;
1401 long value = simple_strtol(buf, NULL, 10);
1402 long rc;
1403
1404 if (attr == &veth_active_attr) {
1405 if (value && !pool->active) {
4aa9c93e
BK		 1406 if (netif_running(netdev)) {
1407 if(ibmveth_alloc_buffer_pool(pool)) {
1408 ibmveth_error_printk("unable to alloc pool\n");
1409 return -ENOMEM;
1410 }
1411 pool->active = 1;
1412 adapter->pool_config = 1;
1413 ibmveth_close(netdev);
1414 adapter->pool_config = 0;
1415 if ((rc = ibmveth_open(netdev)))
1416 return rc;
1417 } else
1418 pool->active = 1;
860f242e
SL		 1419 } else if (!value && pool->active) {
1420 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1421 int i;
1422 /* Make sure there is a buffer pool with buffers that
1423 can hold a packet of the size of the MTU */
76b9cfcc 1424 for (i = 0; i < IbmVethNumBufferPools; i++) {
860f242e
SL		 1425 if (pool == &adapter->rx_buff_pool[i])
1426 continue;
1427 if (!adapter->rx_buff_pool[i].active)
1428 continue;
76b9cfcc
BK		 1429 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1430 break;
860f242e 1431 }
76b9cfcc
BK		 1432
1433 if (i == IbmVethNumBufferPools) {
860f242e
SL		 1434 ibmveth_error_printk("no active pool >= MTU\n");
1435 return -EPERM;
1436 }
76b9cfcc
BK		 1437
1438 pool->active = 0;
1439 if (netif_running(netdev)) {
1440 adapter->pool_config = 1;
1441 ibmveth_close(netdev);
1442 adapter->pool_config = 0;
1443 if ((rc = ibmveth_open(netdev)))
1444 return rc;
1445 }
860f242e
SL		 1446 }
1447 } else if (attr == &veth_num_attr) {
1448 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1449 return -EINVAL;
1450 else {
4aa9c93e
BK		 1451 if (netif_running(netdev)) {
1452 adapter->pool_config = 1;
1453 ibmveth_close(netdev);
1454 adapter->pool_config = 0;
1455 pool->size = value;
1456 if ((rc = ibmveth_open(netdev)))
1457 return rc;
1458 } else
1459 pool->size = value;
860f242e
SL		 1460 }
1461 } else if (attr == &veth_size_attr) {
1462 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1463 return -EINVAL;
1464 else {
4aa9c93e
BK		 1465 if (netif_running(netdev)) {
1466 adapter->pool_config = 1;
1467 ibmveth_close(netdev);
1468 adapter->pool_config = 0;
1469 pool->buff_size = value;
1470 if ((rc = ibmveth_open(netdev)))
1471 return rc;
1472 } else
1473 pool->buff_size = value;
860f242e
SL		 1474 }
1475 }
1476
1477 /* kick the interrupt handler to allocate/deallocate pools */
7d12e780 1478 ibmveth_interrupt(netdev->irq, netdev);
860f242e
SL		 1479 return count;
1480}
1481
1482
1483#define ATTR(_name, _mode) \
1484 struct attribute veth_##_name##_attr = { \
7b595756 1485 .name = __stringify(_name), .mode = _mode, \
860f242e
SL		 1486 };
1487
1488static ATTR(active, 0644);
1489static ATTR(num, 0644);
1490static ATTR(size, 0644);
1491
1492static struct attribute * veth_pool_attrs[] = {
1493 &veth_active_attr,
1494 &veth_num_attr,
1495 &veth_size_attr,
1496 NULL,
1497};
1498
1499static struct sysfs_ops veth_pool_ops = {
1500 .show = veth_pool_show,
1501 .store = veth_pool_store,
1502};
1503
1504static struct kobj_type ktype_veth_pool = {
1505 .release = NULL,
1506 .sysfs_ops = &veth_pool_ops,
1507 .default_attrs = veth_pool_attrs,
1508};
1509
1510
1da177e4
LT		 1511static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1512 { "network", "IBM,l-lan"},
fb120da6 1513 { "", "" }
1da177e4 1514};
1da177e4
LT		 1515MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1516
1517static struct vio_driver ibmveth_driver = {
6fdf5392
SR		 1518 .id_table = ibmveth_device_table,
1519 .probe = ibmveth_probe,
1520 .remove = ibmveth_remove,
1521 .driver = {
1522 .name = ibmveth_driver_name,
915124d8 1523 .owner = THIS_MODULE,
6fdf5392 1524 }
1da177e4
LT		 1525};
1526
1527static int __init ibmveth_module_init(void)
1528{
1529 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1530
1531 ibmveth_proc_register_driver();
1532
1533 return vio_register_driver(&ibmveth_driver);
1534}
1535
1536static void __exit ibmveth_module_exit(void)
1537{
1538 vio_unregister_driver(&ibmveth_driver);
1539 ibmveth_proc_unregister_driver();
d7fbeba6 1540}
1da177e4
LT		 1541
1542module_init(ibmveth_module_init);
1543module_exit(ibmveth_module_exit);
Linux 6.x block layer and io_uring tree(s)