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[PATCH] ibmveth: Harden driver initilisation
[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:
31 - remove frag processing code - no longer needed
32 - add support for sysfs
33 - possibly remove procfs support
34*/
35
1da177e4 36#include <linux/module.h>
1da177e4
LT		 37#include <linux/types.h>
38#include <linux/errno.h>
39#include <linux/ioport.h>
40#include <linux/dma-mapping.h>
41#include <linux/kernel.h>
42#include <linux/netdevice.h>
43#include <linux/etherdevice.h>
44#include <linux/skbuff.h>
45#include <linux/init.h>
46#include <linux/delay.h>
47#include <linux/mm.h>
48#include <linux/ethtool.h>
49#include <linux/proc_fs.h>
50#include <asm/semaphore.h>
51#include <asm/hvcall.h>
52#include <asm/atomic.h>
53#include <asm/iommu.h>
54#include <asm/vio.h>
55#include <asm/uaccess.h>
56#include <linux/seq_file.h>
57
58#include "ibmveth.h"
59
6af37fa9 60#undef DEBUG
1da177e4
LT		 61
62#define ibmveth_printk(fmt, args...) \
f98baffb 63 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
1da177e4
LT		 64
65#define ibmveth_error_printk(fmt, args...) \
66 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
67
68#ifdef DEBUG
69#define ibmveth_debug_printk_no_adapter(fmt, args...) \
70 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
71#define ibmveth_debug_printk(fmt, args...) \
72 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
73#define ibmveth_assert(expr) \
74 if(!(expr)) { \
75 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
76 BUG(); \
77 }
78#else
79#define ibmveth_debug_printk_no_adapter(fmt, args...)
80#define ibmveth_debug_printk(fmt, args...)
d7fbeba6 81#define ibmveth_assert(expr)
1da177e4
LT		 82#endif
83
84static int ibmveth_open(struct net_device *dev);
85static int ibmveth_close(struct net_device *dev);
86static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
87static int ibmveth_poll(struct net_device *dev, int *budget);
88static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
89static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
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);
96static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
b6d35182 97static inline 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
66600221 101#define IBMVETH_PROC_DIR "net/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
114/* simple methods of getting data from the current rxq entry */
115static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
116{
117 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
118}
119
120static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
121{
122 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
123}
124
125static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
126{
127 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
128}
129
130static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
131{
132 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
133}
134
135/* setup the initial settings for a buffer pool */
860f242e 136static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
1da177e4
LT		 137{
138 pool->size = pool_size;
139 pool->index = pool_index;
140 pool->buff_size = buff_size;
141 pool->threshold = pool_size / 2;
860f242e 142 pool->active = pool_active;
1da177e4
LT		 143}
144
145/* allocate and setup an buffer pool - called during open */
146static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
147{
148 int i;
149
d7fbeba6 150 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
1da177e4
LT		 151
152 if(!pool->free_map) {
153 return -1;
154 }
155
d7fbeba6 156 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
1da177e4
LT		 157 if(!pool->dma_addr) {
158 kfree(pool->free_map);
159 pool->free_map = NULL;
160 return -1;
161 }
162
163 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
164
165 if(!pool->skbuff) {
166 kfree(pool->dma_addr);
167 pool->dma_addr = NULL;
168
169 kfree(pool->free_map);
170 pool->free_map = NULL;
171 return -1;
172 }
173
174 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
175 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
176
177 for(i = 0; i < pool->size; ++i) {
178 pool->free_map[i] = i;
179 }
180
181 atomic_set(&pool->available, 0);
182 pool->producer_index = 0;
183 pool->consumer_index = 0;
184
185 return 0;
186}
187
188/* replenish the buffers for a pool. note that we don't need to
189 * skb_reserve these since they are used for incoming...
190 */
191static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
192{
193 u32 i;
194 u32 count = pool->size - atomic_read(&pool->available);
195 u32 buffers_added = 0;
196
197 mb();
198
199 for(i = 0; i < count; ++i) {
200 struct sk_buff *skb;
201 unsigned int free_index, index;
202 u64 correlator;
203 union ibmveth_buf_desc desc;
204 unsigned long lpar_rc;
205 dma_addr_t dma_addr;
206
207 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
208
209 if(!skb) {
210 ibmveth_debug_printk("replenish: unable to allocate skb\n");
211 adapter->replenish_no_mem++;
212 break;
213 }
214
215 free_index = pool->consumer_index++ % pool->size;
216 index = pool->free_map[free_index];
d7fbeba6 217
1da177e4
LT		 218 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
219 ibmveth_assert(pool->skbuff[index] == NULL);
220
221 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
222 pool->buff_size, DMA_FROM_DEVICE);
223
224 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
225 pool->dma_addr[index] = dma_addr;
226 pool->skbuff[index] = skb;
227
228 correlator = ((u64)pool->index << 32) | index;
229 *(u64*)skb->data = correlator;
230
231 desc.desc = 0;
232 desc.fields.valid = 1;
233 desc.fields.length = pool->buff_size;
d7fbeba6 234 desc.fields.address = dma_addr;
1da177e4
LT		 235
236 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
d7fbeba6 237
706c8c93 238 if(lpar_rc != H_SUCCESS) {
82702d37 239 pool->free_map[free_index] = index;
1da177e4
LT		 240 pool->skbuff[index] = NULL;
241 pool->consumer_index--;
242 dma_unmap_single(&adapter->vdev->dev,
243 pool->dma_addr[index], pool->buff_size,
244 DMA_FROM_DEVICE);
245 dev_kfree_skb_any(skb);
246 adapter->replenish_add_buff_failure++;
247 break;
248 } else {
249 buffers_added++;
250 adapter->replenish_add_buff_success++;
251 }
252 }
d7fbeba6 253
1da177e4
LT		 254 mb();
255 atomic_add(buffers_added, &(pool->available));
256}
257
e2adbcb4 258/* replenish routine */
d7fbeba6 259static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
1da177e4 260{
b6d35182
SL		 261 int i;
262
1da177e4
LT		 263 adapter->replenish_task_cycles++;
264
b6d35182
SL		 265 for(i = 0; i < IbmVethNumBufferPools; i++)
266 if(adapter->rx_buff_pool[i].active)
d7fbeba6 267 ibmveth_replenish_buffer_pool(adapter,
b6d35182 268 &adapter->rx_buff_pool[i]);
1da177e4
LT		 269
270 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
1da177e4
LT		 271}
272
273/* empty and free ana buffer pool - also used to do cleanup in error paths */
274static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
275{
276 int i;
277
b4558ea9
JJ		 278 kfree(pool->free_map);
279 pool->free_map = NULL;
1da177e4
LT		 280
281 if(pool->skbuff && pool->dma_addr) {
282 for(i = 0; i < pool->size; ++i) {
283 struct sk_buff *skb = pool->skbuff[i];
284 if(skb) {
285 dma_unmap_single(&adapter->vdev->dev,
286 pool->dma_addr[i],
287 pool->buff_size,
288 DMA_FROM_DEVICE);
289 dev_kfree_skb_any(skb);
290 pool->skbuff[i] = NULL;
291 }
292 }
293 }
294
295 if(pool->dma_addr) {
296 kfree(pool->dma_addr);
297 pool->dma_addr = NULL;
298 }
299
300 if(pool->skbuff) {
301 kfree(pool->skbuff);
302 pool->skbuff = NULL;
303 }
304}
305
306/* remove a buffer from a pool */
307static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
308{
309 unsigned int pool = correlator >> 32;
310 unsigned int index = correlator & 0xffffffffUL;
311 unsigned int free_index;
312 struct sk_buff *skb;
313
314 ibmveth_assert(pool < IbmVethNumBufferPools);
315 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
316
317 skb = adapter->rx_buff_pool[pool].skbuff[index];
318
319 ibmveth_assert(skb != NULL);
320
321 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
322
323 dma_unmap_single(&adapter->vdev->dev,
324 adapter->rx_buff_pool[pool].dma_addr[index],
325 adapter->rx_buff_pool[pool].buff_size,
326 DMA_FROM_DEVICE);
327
328 free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size;
329 adapter->rx_buff_pool[pool].free_map[free_index] = index;
330
331 mb();
332
333 atomic_dec(&(adapter->rx_buff_pool[pool].available));
334}
335
336/* get the current buffer on the rx queue */
337static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
338{
339 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
340 unsigned int pool = correlator >> 32;
341 unsigned int index = correlator & 0xffffffffUL;
342
343 ibmveth_assert(pool < IbmVethNumBufferPools);
344 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
345
346 return adapter->rx_buff_pool[pool].skbuff[index];
347}
348
349/* recycle the current buffer on the rx queue */
350static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
351{
352 u32 q_index = adapter->rx_queue.index;
353 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
354 unsigned int pool = correlator >> 32;
355 unsigned int index = correlator & 0xffffffffUL;
356 union ibmveth_buf_desc desc;
357 unsigned long lpar_rc;
358
359 ibmveth_assert(pool < IbmVethNumBufferPools);
360 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
361
b6d35182
SL		 362 if(!adapter->rx_buff_pool[pool].active) {
363 ibmveth_rxq_harvest_buffer(adapter);
364 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
365 return;
366 }
367
1da177e4
LT		 368 desc.desc = 0;
369 desc.fields.valid = 1;
370 desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
371 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
372
373 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
d7fbeba6 374
706c8c93 375 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 376 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
377 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
378 }
379
380 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
381 adapter->rx_queue.index = 0;
382 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
383 }
384}
385
386static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
387{
388 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
389
390 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
391 adapter->rx_queue.index = 0;
392 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
393 }
394}
395
396static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
397{
b6d35182
SL		 398 int i;
399
1da177e4
LT		 400 if(adapter->buffer_list_addr != NULL) {
401 if(!dma_mapping_error(adapter->buffer_list_dma)) {
402 dma_unmap_single(&adapter->vdev->dev,
403 adapter->buffer_list_dma, 4096,
404 DMA_BIDIRECTIONAL);
405 adapter->buffer_list_dma = DMA_ERROR_CODE;
406 }
407 free_page((unsigned long)adapter->buffer_list_addr);
408 adapter->buffer_list_addr = NULL;
d7fbeba6 409 }
1da177e4
LT		 410
411 if(adapter->filter_list_addr != NULL) {
412 if(!dma_mapping_error(adapter->filter_list_dma)) {
413 dma_unmap_single(&adapter->vdev->dev,
414 adapter->filter_list_dma, 4096,
415 DMA_BIDIRECTIONAL);
416 adapter->filter_list_dma = DMA_ERROR_CODE;
417 }
418 free_page((unsigned long)adapter->filter_list_addr);
419 adapter->filter_list_addr = NULL;
420 }
421
422 if(adapter->rx_queue.queue_addr != NULL) {
423 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
424 dma_unmap_single(&adapter->vdev->dev,
425 adapter->rx_queue.queue_dma,
426 adapter->rx_queue.queue_len,
427 DMA_BIDIRECTIONAL);
428 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
429 }
430 kfree(adapter->rx_queue.queue_addr);
431 adapter->rx_queue.queue_addr = NULL;
432 }
433
b6d35182 434 for(i = 0; i<IbmVethNumBufferPools; i++)
860f242e 435 if (adapter->rx_buff_pool[i].active)
d7fbeba6 436 ibmveth_free_buffer_pool(adapter,
860f242e 437 &adapter->rx_buff_pool[i]);
1da177e4
LT		 438}
439
bbedefcc
ME		 440static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
441 union ibmveth_buf_desc rxq_desc, u64 mac_address)
442{
443 int rc, try_again = 1;
444
445 /* After a kexec the adapter will still be open, so our attempt to
446 * open it will fail. So if we get a failure we free the adapter and
447 * try again, but only once. */
448retry:
449 rc = h_register_logical_lan(adapter->vdev->unit_address,
450 adapter->buffer_list_dma, rxq_desc.desc,
451 adapter->filter_list_dma, mac_address);
452
453 if (rc != H_SUCCESS && try_again) {
454 do {
455 rc = h_free_logical_lan(adapter->vdev->unit_address);
456 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
457
458 try_again = 0;
459 goto retry;
460 }
461
462 return rc;
463}
464
1da177e4
LT		 465static int ibmveth_open(struct net_device *netdev)
466{
467 struct ibmveth_adapter *adapter = netdev->priv;
468 u64 mac_address = 0;
b6d35182 469 int rxq_entries = 1;
1da177e4
LT		 470 unsigned long lpar_rc;
471 int rc;
472 union ibmveth_buf_desc rxq_desc;
b6d35182 473 int i;
1da177e4
LT		 474
475 ibmveth_debug_printk("open starting\n");
476
b6d35182
SL		 477 for(i = 0; i<IbmVethNumBufferPools; i++)
478 rxq_entries += adapter->rx_buff_pool[i].size;
d7fbeba6 479
1da177e4
LT		 480 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
481 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
d7fbeba6 482
1da177e4
LT		 483 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
484 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
485 ibmveth_cleanup(adapter);
486 return -ENOMEM;
487 }
488
489 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
490 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
491
492 if(!adapter->rx_queue.queue_addr) {
493 ibmveth_error_printk("unable to allocate rx queue pages\n");
494 ibmveth_cleanup(adapter);
495 return -ENOMEM;
496 }
497
498 adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
499 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
500 adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
501 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
502 adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
503 adapter->rx_queue.queue_addr,
504 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
505
506 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
507 (dma_mapping_error(adapter->filter_list_dma)) ||
508 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
509 ibmveth_error_printk("unable to map filter or buffer list pages\n");
510 ibmveth_cleanup(adapter);
511 return -ENOMEM;
512 }
513
514 adapter->rx_queue.index = 0;
515 adapter->rx_queue.num_slots = rxq_entries;
516 adapter->rx_queue.toggle = 1;
517
1da177e4
LT		 518 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
519 mac_address = mac_address >> 16;
520
521 rxq_desc.desc = 0;
522 rxq_desc.fields.valid = 1;
523 rxq_desc.fields.length = adapter->rx_queue.queue_len;
524 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
525
526 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
527 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
528 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
529
bbedefcc 530 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
1da177e4 531
706c8c93 532 if(lpar_rc != H_SUCCESS) {
1da177e4 533 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
8168f902 534 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
1da177e4
LT		 535 adapter->buffer_list_dma,
536 adapter->filter_list_dma,
537 rxq_desc.desc,
538 mac_address);
539 ibmveth_cleanup(adapter);
d7fbeba6 540 return -ENONET;
1da177e4
LT		 541 }
542
860f242e
SL		 543 for(i = 0; i<IbmVethNumBufferPools; i++) {
544 if(!adapter->rx_buff_pool[i].active)
545 continue;
546 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
547 ibmveth_error_printk("unable to alloc pool\n");
548 adapter->rx_buff_pool[i].active = 0;
549 ibmveth_cleanup(adapter);
550 return -ENOMEM ;
551 }
552 }
553
1da177e4
LT		 554 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
555 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
556 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
557 do {
558 rc = h_free_logical_lan(adapter->vdev->unit_address);
706c8c93 559 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
1da177e4
LT		 560
561 ibmveth_cleanup(adapter);
562 return rc;
563 }
564
e2adbcb4 565 ibmveth_debug_printk("initial replenish cycle\n");
6c2af71f 566 ibmveth_interrupt(netdev->irq, netdev, NULL);
1da177e4 567
e2adbcb4 568 netif_start_queue(netdev);
1da177e4
LT		 569
570 ibmveth_debug_printk("open complete\n");
571
572 return 0;
573}
574
575static int ibmveth_close(struct net_device *netdev)
576{
577 struct ibmveth_adapter *adapter = netdev->priv;
578 long lpar_rc;
d7fbeba6 579
1da177e4
LT		 580 ibmveth_debug_printk("close starting\n");
581
860f242e
SL		 582 if (!adapter->pool_config)
583 netif_stop_queue(netdev);
1da177e4
LT		 584
585 free_irq(netdev->irq, netdev);
586
1da177e4
LT		 587 do {
588 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
706c8c93 589 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
1da177e4 590
706c8c93 591 if(lpar_rc != H_SUCCESS)
1da177e4
LT		 592 {
593 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
594 lpar_rc);
595 }
596
597 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
598
599 ibmveth_cleanup(adapter);
600
601 ibmveth_debug_printk("close complete\n");
602
603 return 0;
604}
605
606static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
607 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
608 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
609 cmd->speed = SPEED_1000;
610 cmd->duplex = DUPLEX_FULL;
611 cmd->port = PORT_FIBRE;
612 cmd->phy_address = 0;
613 cmd->transceiver = XCVR_INTERNAL;
614 cmd->autoneg = AUTONEG_ENABLE;
615 cmd->maxtxpkt = 0;
616 cmd->maxrxpkt = 1;
617 return 0;
618}
619
620static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
621 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
622 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
623}
624
625static u32 netdev_get_link(struct net_device *dev) {
626 return 1;
627}
628
7282d491 629static const struct ethtool_ops netdev_ethtool_ops = {
1da177e4
LT		 630 .get_drvinfo = netdev_get_drvinfo,
631 .get_settings = netdev_get_settings,
632 .get_link = netdev_get_link,
633 .get_sg = ethtool_op_get_sg,
634 .get_tx_csum = ethtool_op_get_tx_csum,
635};
636
637static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
638{
639 return -EOPNOTSUPP;
640}
641
642#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
643
644static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
645{
646 struct ibmveth_adapter *adapter = netdev->priv;
647 union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
648 unsigned long lpar_rc;
649 int nfrags = 0, curfrag;
650 unsigned long correlator;
60296d9e 651 unsigned long flags;
1da177e4 652 unsigned int retry_count;
60296d9e
SL		 653 unsigned int tx_dropped = 0;
654 unsigned int tx_bytes = 0;
655 unsigned int tx_packets = 0;
656 unsigned int tx_send_failed = 0;
657 unsigned int tx_map_failed = 0;
658
1da177e4
LT		 659
660 if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
60296d9e
SL		 661 tx_dropped++;
662 goto out;
1da177e4
LT		 663 }
664
665 memset(&desc, 0, sizeof(desc));
666
667 /* nfrags = number of frags after the initial fragment */
668 nfrags = skb_shinfo(skb)->nr_frags;
669
670 if(nfrags)
671 adapter->tx_multidesc_send++;
672
673 /* map the initial fragment */
674 desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
675 desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
676 desc[0].fields.length, DMA_TO_DEVICE);
677 desc[0].fields.valid = 1;
678
679 if(dma_mapping_error(desc[0].fields.address)) {
680 ibmveth_error_printk("tx: unable to map initial fragment\n");
60296d9e
SL		 681 tx_map_failed++;
682 tx_dropped++;
683 goto out;
1da177e4
LT		 684 }
685
686 curfrag = nfrags;
687
688 /* map fragments past the initial portion if there are any */
689 while(curfrag--) {
690 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
691 desc[curfrag+1].fields.address
692 = dma_map_single(&adapter->vdev->dev,
693 page_address(frag->page) + frag->page_offset,
694 frag->size, DMA_TO_DEVICE);
695 desc[curfrag+1].fields.length = frag->size;
696 desc[curfrag+1].fields.valid = 1;
697
698 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
699 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
60296d9e
SL		 700 tx_map_failed++;
701 tx_dropped++;
1da177e4
LT		 702 /* Free all the mappings we just created */
703 while(curfrag < nfrags) {
704 dma_unmap_single(&adapter->vdev->dev,
705 desc[curfrag+1].fields.address,
706 desc[curfrag+1].fields.length,
707 DMA_TO_DEVICE);
708 curfrag++;
709 }
60296d9e 710 goto out;
1da177e4
LT		 711 }
712 }
713
714 /* send the frame. Arbitrarily set retrycount to 1024 */
715 correlator = 0;
716 retry_count = 1024;
717 do {
718 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
719 desc[0].desc,
720 desc[1].desc,
721 desc[2].desc,
722 desc[3].desc,
723 desc[4].desc,
724 desc[5].desc,
b9377ffc
AB		 725 correlator,
726 &correlator);
706c8c93 727 } while ((lpar_rc == H_BUSY) && (retry_count--));
d7fbeba6 728
706c8c93 729 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
1da177e4
LT		 730 int i;
731 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
732 for(i = 0; i < 6; i++) {
733 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
734 desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
735 }
60296d9e
SL		 736 tx_send_failed++;
737 tx_dropped++;
1da177e4 738 } else {
60296d9e
SL		 739 tx_packets++;
740 tx_bytes += skb->len;
0abe791e 741 netdev->trans_start = jiffies;
1da177e4
LT		 742 }
743
744 do {
745 dma_unmap_single(&adapter->vdev->dev,
746 desc[nfrags].fields.address,
747 desc[nfrags].fields.length, DMA_TO_DEVICE);
748 } while(--nfrags >= 0);
749
60296d9e
SL		 750out: spin_lock_irqsave(&adapter->stats_lock, flags);
751 adapter->stats.tx_dropped += tx_dropped;
752 adapter->stats.tx_bytes += tx_bytes;
753 adapter->stats.tx_packets += tx_packets;
754 adapter->tx_send_failed += tx_send_failed;
755 adapter->tx_map_failed += tx_map_failed;
756 spin_unlock_irqrestore(&adapter->stats_lock, flags);
757
1da177e4
LT		 758 dev_kfree_skb(skb);
759 return 0;
760}
761
762static int ibmveth_poll(struct net_device *netdev, int *budget)
763{
764 struct ibmveth_adapter *adapter = netdev->priv;
765 int max_frames_to_process = netdev->quota;
766 int frames_processed = 0;
767 int more_work = 1;
768 unsigned long lpar_rc;
769
770 restart_poll:
771 do {
772 struct net_device *netdev = adapter->netdev;
773
774 if(ibmveth_rxq_pending_buffer(adapter)) {
775 struct sk_buff *skb;
776
777 rmb();
778
779 if(!ibmveth_rxq_buffer_valid(adapter)) {
780 wmb(); /* suggested by larson1 */
781 adapter->rx_invalid_buffer++;
782 ibmveth_debug_printk("recycling invalid buffer\n");
783 ibmveth_rxq_recycle_buffer(adapter);
784 } else {
785 int length = ibmveth_rxq_frame_length(adapter);
786 int offset = ibmveth_rxq_frame_offset(adapter);
787 skb = ibmveth_rxq_get_buffer(adapter);
788
789 ibmveth_rxq_harvest_buffer(adapter);
790
791 skb_reserve(skb, offset);
792 skb_put(skb, length);
793 skb->dev = netdev;
794 skb->protocol = eth_type_trans(skb, netdev);
795
796 netif_receive_skb(skb); /* send it up */
797
798 adapter->stats.rx_packets++;
799 adapter->stats.rx_bytes += length;
800 frames_processed++;
0abe791e 801 netdev->last_rx = jiffies;
1da177e4
LT		 802 }
803 } else {
804 more_work = 0;
805 }
806 } while(more_work && (frames_processed < max_frames_to_process));
807
e2adbcb4 808 ibmveth_replenish_task(adapter);
1da177e4
LT		 809
810 if(more_work) {
811 /* more work to do - return that we are not done yet */
812 netdev->quota -= frames_processed;
813 *budget -= frames_processed;
d7fbeba6 814 return 1;
1da177e4
LT		 815 }
816
817 /* we think we are done - reenable interrupts, then check once more to make sure we are done */
818 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
819
706c8c93 820 ibmveth_assert(lpar_rc == H_SUCCESS);
1da177e4
LT		 821
822 netif_rx_complete(netdev);
823
824 if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
825 {
826 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
706c8c93 827 ibmveth_assert(lpar_rc == H_SUCCESS);
1da177e4
LT		 828 more_work = 1;
829 goto restart_poll;
830 }
831
832 netdev->quota -= frames_processed;
833 *budget -= frames_processed;
834
835 /* we really are done */
836 return 0;
837}
838
839static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
d7fbeba6 840{
1da177e4
LT		 841 struct net_device *netdev = dev_instance;
842 struct ibmveth_adapter *adapter = netdev->priv;
843 unsigned long lpar_rc;
844
845 if(netif_rx_schedule_prep(netdev)) {
846 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
706c8c93 847 ibmveth_assert(lpar_rc == H_SUCCESS);
1da177e4
LT		 848 __netif_rx_schedule(netdev);
849 }
850 return IRQ_HANDLED;
851}
852
853static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
854{
855 struct ibmveth_adapter *adapter = dev->priv;
856 return &adapter->stats;
857}
858
859static void ibmveth_set_multicast_list(struct net_device *netdev)
860{
861 struct ibmveth_adapter *adapter = netdev->priv;
862 unsigned long lpar_rc;
863
864 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
865 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
866 IbmVethMcastEnableRecv |
867 IbmVethMcastDisableFiltering,
868 0);
706c8c93 869 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 870 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
871 }
872 } else {
873 struct dev_mc_list *mclist = netdev->mc_list;
874 int i;
875 /* clear the filter table & disable filtering */
876 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
877 IbmVethMcastEnableRecv |
878 IbmVethMcastDisableFiltering |
879 IbmVethMcastClearFilterTable,
880 0);
706c8c93 881 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 882 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
883 }
884 /* add the addresses to the filter table */
885 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
886 // add the multicast address to the filter table
887 unsigned long mcast_addr = 0;
888 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
889 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
890 IbmVethMcastAddFilter,
891 mcast_addr);
706c8c93 892 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 893 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
894 }
895 }
d7fbeba6 896
1da177e4
LT		 897 /* re-enable filtering */
898 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
899 IbmVethMcastEnableFiltering,
900 0);
706c8c93 901 if(lpar_rc != H_SUCCESS) {
1da177e4
LT		 902 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
903 }
904 }
905}
906
907static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
908{
b6d35182 909 struct ibmveth_adapter *adapter = dev->priv;
860f242e 910 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
b6d35182 911 int i;
b6d35182 912
860f242e 913 if (new_mtu < IBMVETH_MAX_MTU)
1da177e4 914 return -EINVAL;
b6d35182 915
860f242e 916 /* Look for an active buffer pool that can hold the new MTU */
b6d35182 917 for(i = 0; i<IbmVethNumBufferPools; i++) {
860f242e
SL		 918 if (!adapter->rx_buff_pool[i].active)
919 continue;
920 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
921 dev->mtu = new_mtu;
922 return 0;
b6d35182 923 }
b6d35182 924 }
860f242e 925 return -EINVAL;
1da177e4
LT		 926}
927
928static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
929{
b6d35182 930 int rc, i;
1da177e4 931 struct net_device *netdev;
b6d35182 932 struct ibmveth_adapter *adapter = NULL;
1da177e4
LT		 933
934 unsigned char *mac_addr_p;
935 unsigned int *mcastFilterSize_p;
936
937
d7fbeba6 938 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1da177e4
LT		 939 dev->unit_address);
940
941 mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
942 if(!mac_addr_p) {
943 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
944 "attribute\n", __FILE__, __LINE__);
945 return 0;
946 }
d7fbeba6 947
1da177e4
LT		 948 mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
949 if(!mcastFilterSize_p) {
950 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
951 "VETH_MCAST_FILTER_SIZE attribute\n",
952 __FILE__, __LINE__);
953 return 0;
954 }
d7fbeba6 955
1da177e4
LT		 956 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
957
958 if(!netdev)
959 return -ENOMEM;
960
961 SET_MODULE_OWNER(netdev);
962
963 adapter = netdev->priv;
964 memset(adapter, 0, sizeof(adapter));
965 dev->dev.driver_data = netdev;
966
967 adapter->vdev = dev;
968 adapter->netdev = netdev;
969 adapter->mcastFilterSize= *mcastFilterSize_p;
860f242e 970 adapter->pool_config = 0;
d7fbeba6 971
1da177e4 972 /* Some older boxes running PHYP non-natively have an OF that
d7fbeba6 973 returns a 8-byte local-mac-address field (and the first
1da177e4 974 2 bytes have to be ignored) while newer boxes' OF return
d7fbeba6 975 a 6-byte field. Note that IEEE 1275 specifies that
1da177e4 976 local-mac-address must be a 6-byte field.
d7fbeba6 977 The RPA doc specifies that the first byte must be 10b, so
1da177e4
LT		 978 we'll just look for it to solve this 8 vs. 6 byte field issue */
979
980 if ((*mac_addr_p & 0x3) != 0x02)
981 mac_addr_p += 2;
982
983 adapter->mac_addr = 0;
984 memcpy(&adapter->mac_addr, mac_addr_p, 6);
985
986 adapter->liobn = dev->iommu_table->it_index;
d7fbeba6 987
1da177e4
LT		 988 netdev->irq = dev->irq;
989 netdev->open = ibmveth_open;
990 netdev->poll = ibmveth_poll;
991 netdev->weight = 16;
992 netdev->stop = ibmveth_close;
993 netdev->hard_start_xmit = ibmveth_start_xmit;
994 netdev->get_stats = ibmveth_get_stats;
995 netdev->set_multicast_list = ibmveth_set_multicast_list;
996 netdev->do_ioctl = ibmveth_ioctl;
997 netdev->ethtool_ops = &netdev_ethtool_ops;
998 netdev->change_mtu = ibmveth_change_mtu;
999 SET_NETDEV_DEV(netdev, &dev->dev);
d7fbeba6 1000 netdev->features |= NETIF_F_LLTX;
60296d9e 1001 spin_lock_init(&adapter->stats_lock);
1da177e4
LT		 1002
1003 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1004
860f242e
SL		 1005 for(i = 0; i<IbmVethNumBufferPools; i++) {
1006 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
d7fbeba6
JG		 1007 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1008 pool_count[i], pool_size[i],
860f242e
SL		 1009 pool_active[i]);
1010 kobj->parent = &dev->dev.kobj;
1011 sprintf(kobj->name, "pool%d", i);
1012 kobj->ktype = &ktype_veth_pool;
1013 kobject_register(kobj);
1014 }
1da177e4
LT		 1015
1016 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1017
1da177e4
LT		 1018 adapter->buffer_list_dma = DMA_ERROR_CODE;
1019 adapter->filter_list_dma = DMA_ERROR_CODE;
1020 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1021
1da177e4
LT		 1022 ibmveth_debug_printk("registering netdev...\n");
1023
1024 rc = register_netdev(netdev);
1025
1026 if(rc) {
1027 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1028 free_netdev(netdev);
1029 return rc;
1030 }
1031
1032 ibmveth_debug_printk("registered\n");
1033
1034 ibmveth_proc_register_adapter(adapter);
1035
1036 return 0;
1037}
1038
1039static int __devexit ibmveth_remove(struct vio_dev *dev)
1040{
1041 struct net_device *netdev = dev->dev.driver_data;
1042 struct ibmveth_adapter *adapter = netdev->priv;
860f242e
SL		 1043 int i;
1044
1045 for(i = 0; i<IbmVethNumBufferPools; i++)
1046 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1da177e4
LT		 1047
1048 unregister_netdev(netdev);
1049
1050 ibmveth_proc_unregister_adapter(adapter);
1051
1052 free_netdev(netdev);
1053 return 0;
1054}
1055
1056#ifdef CONFIG_PROC_FS
1057static void ibmveth_proc_register_driver(void)
1058{
66600221 1059 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
1da177e4
LT		 1060 if (ibmveth_proc_dir) {
1061 SET_MODULE_OWNER(ibmveth_proc_dir);
1062 }
1063}
1064
1065static void ibmveth_proc_unregister_driver(void)
1066{
66600221 1067 remove_proc_entry(IBMVETH_PROC_DIR, NULL);
1da177e4
LT		 1068}
1069
d7fbeba6 1070static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1da177e4
LT		 1071{
1072 if (*pos == 0) {
1073 return (void *)1;
1074 } else {
1075 return NULL;
1076 }
1077}
1078
1079static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1080{
1081 ++*pos;
1082 return NULL;
1083}
1084
d7fbeba6 1085static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1da177e4
LT		 1086{
1087}
1088
d7fbeba6 1089static int ibmveth_seq_show(struct seq_file *seq, void *v)
1da177e4
LT		 1090{
1091 struct ibmveth_adapter *adapter = seq->private;
1092 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1093 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1094
1095 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
d7fbeba6 1096
1da177e4
LT		 1097 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1098 seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn);
1099 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1100 current_mac[0], current_mac[1], current_mac[2],
1101 current_mac[3], current_mac[4], current_mac[5]);
1102 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1103 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1104 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
d7fbeba6 1105
1da177e4
LT		 1106 seq_printf(seq, "\nAdapter Statistics:\n");
1107 seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
1108 seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
1109 seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
1110 seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
1111 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1112 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1113 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1114 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1115 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1116 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
d7fbeba6 1117
1da177e4
LT		 1118 return 0;
1119}
1120static struct seq_operations ibmveth_seq_ops = {
1121 .start = ibmveth_seq_start,
1122 .next = ibmveth_seq_next,
1123 .stop = ibmveth_seq_stop,
1124 .show = ibmveth_seq_show,
1125};
1126
1127static int ibmveth_proc_open(struct inode *inode, struct file *file)
1128{
1129 struct seq_file *seq;
1130 struct proc_dir_entry *proc;
1131 int rc;
1132
1133 rc = seq_open(file, &ibmveth_seq_ops);
1134 if (!rc) {
1135 /* recover the pointer buried in proc_dir_entry data */
1136 seq = file->private_data;
1137 proc = PDE(inode);
1138 seq->private = proc->data;
1139 }
1140 return rc;
1141}
1142
1143static struct file_operations ibmveth_proc_fops = {
1144 .owner = THIS_MODULE,
1145 .open = ibmveth_proc_open,
1146 .read = seq_read,
1147 .llseek = seq_lseek,
1148 .release = seq_release,
1149};
1150
1151static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1152{
1153 struct proc_dir_entry *entry;
1154 if (ibmveth_proc_dir) {
1155 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1156 if (!entry) {
1157 ibmveth_error_printk("Cannot create adapter proc entry");
1158 } else {
1159 entry->data = (void *) adapter;
1160 entry->proc_fops = &ibmveth_proc_fops;
1161 SET_MODULE_OWNER(entry);
1162 }
1163 }
1164 return;
1165}
1166
1167static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1168{
1169 if (ibmveth_proc_dir) {
1170 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1171 }
1172}
1173
1174#else /* CONFIG_PROC_FS */
d7fbeba6 1175static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1da177e4
LT		 1176{
1177}
1178
d7fbeba6 1179static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1da177e4
LT		 1180{
1181}
1182static void ibmveth_proc_register_driver(void)
1183{
1184}
1185
1186static void ibmveth_proc_unregister_driver(void)
1187{
1188}
1189#endif /* CONFIG_PROC_FS */
1190
860f242e
SL		 1191static struct attribute veth_active_attr;
1192static struct attribute veth_num_attr;
1193static struct attribute veth_size_attr;
1194
1195static ssize_t veth_pool_show(struct kobject * kobj,
1196 struct attribute * attr, char * buf)
1197{
d7fbeba6 1198 struct ibmveth_buff_pool *pool = container_of(kobj,
860f242e
SL		 1199 struct ibmveth_buff_pool,
1200 kobj);
1201
1202 if (attr == &veth_active_attr)
1203 return sprintf(buf, "%d\n", pool->active);
1204 else if (attr == &veth_num_attr)
1205 return sprintf(buf, "%d\n", pool->size);
1206 else if (attr == &veth_size_attr)
1207 return sprintf(buf, "%d\n", pool->buff_size);
1208 return 0;
1209}
1210
1211static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1212const char * buf, size_t count)
1213{
d7fbeba6 1214 struct ibmveth_buff_pool *pool = container_of(kobj,
860f242e
SL		 1215 struct ibmveth_buff_pool,
1216 kobj);
d7fbeba6 1217 struct net_device *netdev =
860f242e
SL		 1218 container_of(kobj->parent, struct device, kobj)->driver_data;
1219 struct ibmveth_adapter *adapter = netdev->priv;
1220 long value = simple_strtol(buf, NULL, 10);
1221 long rc;
1222
1223 if (attr == &veth_active_attr) {
1224 if (value && !pool->active) {
1225 if(ibmveth_alloc_buffer_pool(pool)) {
1226 ibmveth_error_printk("unable to alloc pool\n");
1227 return -ENOMEM;
1228 }
1229 pool->active = 1;
1230 adapter->pool_config = 1;
1231 ibmveth_close(netdev);
1232 adapter->pool_config = 0;
1233 if ((rc = ibmveth_open(netdev)))
1234 return rc;
1235 } else if (!value && pool->active) {
1236 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1237 int i;
1238 /* Make sure there is a buffer pool with buffers that
1239 can hold a packet of the size of the MTU */
1240 for(i = 0; i<IbmVethNumBufferPools; i++) {
1241 if (pool == &adapter->rx_buff_pool[i])
1242 continue;
1243 if (!adapter->rx_buff_pool[i].active)
1244 continue;
1245 if (mtu < adapter->rx_buff_pool[i].buff_size) {
1246 pool->active = 0;
1247 h_free_logical_lan_buffer(adapter->
1248 vdev->
1249 unit_address,
1250 pool->
1251 buff_size);
1252 }
1253 }
1254 if (pool->active) {
1255 ibmveth_error_printk("no active pool >= MTU\n");
1256 return -EPERM;
1257 }
1258 }
1259 } else if (attr == &veth_num_attr) {
1260 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1261 return -EINVAL;
1262 else {
1263 adapter->pool_config = 1;
1264 ibmveth_close(netdev);
1265 adapter->pool_config = 0;
1266 pool->size = value;
1267 if ((rc = ibmveth_open(netdev)))
1268 return rc;
1269 }
1270 } else if (attr == &veth_size_attr) {
1271 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1272 return -EINVAL;
1273 else {
1274 adapter->pool_config = 1;
1275 ibmveth_close(netdev);
1276 adapter->pool_config = 0;
1277 pool->buff_size = value;
1278 if ((rc = ibmveth_open(netdev)))
1279 return rc;
1280 }
1281 }
1282
1283 /* kick the interrupt handler to allocate/deallocate pools */
1284 ibmveth_interrupt(netdev->irq, netdev, NULL);
1285 return count;
1286}
1287
1288
1289#define ATTR(_name, _mode) \
1290 struct attribute veth_##_name##_attr = { \
1291 .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
1292 };
1293
1294static ATTR(active, 0644);
1295static ATTR(num, 0644);
1296static ATTR(size, 0644);
1297
1298static struct attribute * veth_pool_attrs[] = {
1299 &veth_active_attr,
1300 &veth_num_attr,
1301 &veth_size_attr,
1302 NULL,
1303};
1304
1305static struct sysfs_ops veth_pool_ops = {
1306 .show = veth_pool_show,
1307 .store = veth_pool_store,
1308};
1309
1310static struct kobj_type ktype_veth_pool = {
1311 .release = NULL,
1312 .sysfs_ops = &veth_pool_ops,
1313 .default_attrs = veth_pool_attrs,
1314};
1315
1316
1da177e4
LT		 1317static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1318 { "network", "IBM,l-lan"},
fb120da6 1319 { "", "" }
1da177e4 1320};
1da177e4
LT		 1321MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1322
1323static struct vio_driver ibmveth_driver = {
6fdf5392
SR		 1324 .id_table = ibmveth_device_table,
1325 .probe = ibmveth_probe,
1326 .remove = ibmveth_remove,
1327 .driver = {
1328 .name = ibmveth_driver_name,
915124d8 1329 .owner = THIS_MODULE,
6fdf5392 1330 }
1da177e4
LT		 1331};
1332
1333static int __init ibmveth_module_init(void)
1334{
1335 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1336
1337 ibmveth_proc_register_driver();
1338
1339 return vio_register_driver(&ibmveth_driver);
1340}
1341
1342static void __exit ibmveth_module_exit(void)
1343{
1344 vio_unregister_driver(&ibmveth_driver);
1345 ibmveth_proc_unregister_driver();
d7fbeba6 1346}
1da177e4
LT		 1347
1348module_init(ibmveth_module_init);
1349module_exit(ibmveth_module_exit);
Linux 6.x block layer and io_uring tree(s)