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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 | ||
36 | #include <linux/config.h> | |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/errno.h> | |
40 | #include <linux/ioport.h> | |
41 | #include <linux/dma-mapping.h> | |
42 | #include <linux/kernel.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <linux/etherdevice.h> | |
45 | #include <linux/skbuff.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/delay.h> | |
48 | #include <linux/mm.h> | |
49 | #include <linux/ethtool.h> | |
50 | #include <linux/proc_fs.h> | |
51 | #include <asm/semaphore.h> | |
52 | #include <asm/hvcall.h> | |
53 | #include <asm/atomic.h> | |
54 | #include <asm/iommu.h> | |
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 | ||
85 | static int ibmveth_open(struct net_device *dev); | |
86 | static int ibmveth_close(struct net_device *dev); | |
87 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
88 | static int ibmveth_poll(struct net_device *dev, int *budget); | |
89 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
90 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev); | |
91 | static void ibmveth_set_multicast_list(struct net_device *dev); | |
92 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
93 | static void ibmveth_proc_register_driver(void); | |
94 | static void ibmveth_proc_unregister_driver(void); | |
95 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
96 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
97 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs); | |
b6d35182 | 98 | static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
860f242e | 99 | static struct kobj_type ktype_veth_pool; |
1da177e4 LT |
100 | |
101 | #ifdef CONFIG_PROC_FS | |
66600221 | 102 | #define IBMVETH_PROC_DIR "net/ibmveth" |
1da177e4 LT |
103 | static struct proc_dir_entry *ibmveth_proc_dir; |
104 | #endif | |
105 | ||
106 | static const char ibmveth_driver_name[] = "ibmveth"; | |
107 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
108 | #define ibmveth_driver_version "1.03" | |
109 | ||
110 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
111 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
112 | MODULE_LICENSE("GPL"); | |
113 | MODULE_VERSION(ibmveth_driver_version); | |
114 | ||
115 | /* simple methods of getting data from the current rxq entry */ | |
116 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) | |
117 | { | |
118 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle); | |
119 | } | |
120 | ||
121 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
122 | { | |
123 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid); | |
124 | } | |
125 | ||
126 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
127 | { | |
128 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset); | |
129 | } | |
130 | ||
131 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
132 | { | |
133 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
134 | } | |
135 | ||
136 | /* setup the initial settings for a buffer pool */ | |
860f242e | 137 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active) |
1da177e4 LT |
138 | { |
139 | pool->size = pool_size; | |
140 | pool->index = pool_index; | |
141 | pool->buff_size = buff_size; | |
142 | pool->threshold = pool_size / 2; | |
860f242e | 143 | pool->active = pool_active; |
1da177e4 LT |
144 | } |
145 | ||
146 | /* allocate and setup an buffer pool - called during open */ | |
147 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
148 | { | |
149 | int i; | |
150 | ||
d7fbeba6 | 151 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
152 | |
153 | if(!pool->free_map) { | |
154 | return -1; | |
155 | } | |
156 | ||
d7fbeba6 | 157 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
158 | if(!pool->dma_addr) { |
159 | kfree(pool->free_map); | |
160 | pool->free_map = NULL; | |
161 | return -1; | |
162 | } | |
163 | ||
164 | pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL); | |
165 | ||
166 | if(!pool->skbuff) { | |
167 | kfree(pool->dma_addr); | |
168 | pool->dma_addr = NULL; | |
169 | ||
170 | kfree(pool->free_map); | |
171 | pool->free_map = NULL; | |
172 | return -1; | |
173 | } | |
174 | ||
175 | memset(pool->skbuff, 0, sizeof(void*) * pool->size); | |
176 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); | |
177 | ||
178 | for(i = 0; i < pool->size; ++i) { | |
179 | pool->free_map[i] = i; | |
180 | } | |
181 | ||
182 | atomic_set(&pool->available, 0); | |
183 | pool->producer_index = 0; | |
184 | pool->consumer_index = 0; | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | /* replenish the buffers for a pool. note that we don't need to | |
190 | * skb_reserve these since they are used for incoming... | |
191 | */ | |
192 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
193 | { | |
194 | u32 i; | |
195 | u32 count = pool->size - atomic_read(&pool->available); | |
196 | u32 buffers_added = 0; | |
197 | ||
198 | mb(); | |
199 | ||
200 | for(i = 0; i < count; ++i) { | |
201 | struct sk_buff *skb; | |
202 | unsigned int free_index, index; | |
203 | u64 correlator; | |
204 | union ibmveth_buf_desc desc; | |
205 | unsigned long lpar_rc; | |
206 | dma_addr_t dma_addr; | |
207 | ||
208 | skb = alloc_skb(pool->buff_size, GFP_ATOMIC); | |
209 | ||
210 | if(!skb) { | |
211 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
212 | adapter->replenish_no_mem++; | |
213 | break; | |
214 | } | |
215 | ||
216 | free_index = pool->consumer_index++ % pool->size; | |
217 | index = pool->free_map[free_index]; | |
d7fbeba6 | 218 | |
1da177e4 LT |
219 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
220 | ibmveth_assert(pool->skbuff[index] == NULL); | |
221 | ||
222 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
223 | pool->buff_size, DMA_FROM_DEVICE); | |
224 | ||
225 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; | |
226 | pool->dma_addr[index] = dma_addr; | |
227 | pool->skbuff[index] = skb; | |
228 | ||
229 | correlator = ((u64)pool->index << 32) | index; | |
230 | *(u64*)skb->data = correlator; | |
231 | ||
232 | desc.desc = 0; | |
233 | desc.fields.valid = 1; | |
234 | desc.fields.length = pool->buff_size; | |
d7fbeba6 | 235 | desc.fields.address = dma_addr; |
1da177e4 LT |
236 | |
237 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 238 | |
706c8c93 | 239 | if(lpar_rc != H_SUCCESS) { |
82702d37 | 240 | pool->free_map[free_index] = index; |
1da177e4 LT |
241 | pool->skbuff[index] = NULL; |
242 | pool->consumer_index--; | |
243 | dma_unmap_single(&adapter->vdev->dev, | |
244 | pool->dma_addr[index], pool->buff_size, | |
245 | DMA_FROM_DEVICE); | |
246 | dev_kfree_skb_any(skb); | |
247 | adapter->replenish_add_buff_failure++; | |
248 | break; | |
249 | } else { | |
250 | buffers_added++; | |
251 | adapter->replenish_add_buff_success++; | |
252 | } | |
253 | } | |
d7fbeba6 | 254 | |
1da177e4 LT |
255 | mb(); |
256 | atomic_add(buffers_added, &(pool->available)); | |
257 | } | |
258 | ||
e2adbcb4 | 259 | /* replenish routine */ |
d7fbeba6 | 260 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 261 | { |
b6d35182 SL |
262 | int i; |
263 | ||
1da177e4 LT |
264 | adapter->replenish_task_cycles++; |
265 | ||
b6d35182 SL |
266 | for(i = 0; i < IbmVethNumBufferPools; i++) |
267 | if(adapter->rx_buff_pool[i].active) | |
d7fbeba6 | 268 | ibmveth_replenish_buffer_pool(adapter, |
b6d35182 | 269 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
270 | |
271 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
275 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
276 | { | |
277 | int i; | |
278 | ||
b4558ea9 JJ |
279 | kfree(pool->free_map); |
280 | pool->free_map = NULL; | |
1da177e4 LT |
281 | |
282 | if(pool->skbuff && pool->dma_addr) { | |
283 | for(i = 0; i < pool->size; ++i) { | |
284 | struct sk_buff *skb = pool->skbuff[i]; | |
285 | if(skb) { | |
286 | dma_unmap_single(&adapter->vdev->dev, | |
287 | pool->dma_addr[i], | |
288 | pool->buff_size, | |
289 | DMA_FROM_DEVICE); | |
290 | dev_kfree_skb_any(skb); | |
291 | pool->skbuff[i] = NULL; | |
292 | } | |
293 | } | |
294 | } | |
295 | ||
296 | if(pool->dma_addr) { | |
297 | kfree(pool->dma_addr); | |
298 | pool->dma_addr = NULL; | |
299 | } | |
300 | ||
301 | if(pool->skbuff) { | |
302 | kfree(pool->skbuff); | |
303 | pool->skbuff = NULL; | |
304 | } | |
305 | } | |
306 | ||
307 | /* remove a buffer from a pool */ | |
308 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
309 | { | |
310 | unsigned int pool = correlator >> 32; | |
311 | unsigned int index = correlator & 0xffffffffUL; | |
312 | unsigned int free_index; | |
313 | struct sk_buff *skb; | |
314 | ||
315 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
316 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
317 | ||
318 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
319 | ||
320 | ibmveth_assert(skb != NULL); | |
321 | ||
322 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
323 | ||
324 | dma_unmap_single(&adapter->vdev->dev, | |
325 | adapter->rx_buff_pool[pool].dma_addr[index], | |
326 | adapter->rx_buff_pool[pool].buff_size, | |
327 | DMA_FROM_DEVICE); | |
328 | ||
329 | free_index = adapter->rx_buff_pool[pool].producer_index++ % adapter->rx_buff_pool[pool].size; | |
330 | adapter->rx_buff_pool[pool].free_map[free_index] = index; | |
331 | ||
332 | mb(); | |
333 | ||
334 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
335 | } | |
336 | ||
337 | /* get the current buffer on the rx queue */ | |
338 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
339 | { | |
340 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
341 | unsigned int pool = correlator >> 32; | |
342 | unsigned int index = correlator & 0xffffffffUL; | |
343 | ||
344 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
345 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
346 | ||
347 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
348 | } | |
349 | ||
350 | /* recycle the current buffer on the rx queue */ | |
351 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
352 | { | |
353 | u32 q_index = adapter->rx_queue.index; | |
354 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
355 | unsigned int pool = correlator >> 32; | |
356 | unsigned int index = correlator & 0xffffffffUL; | |
357 | union ibmveth_buf_desc desc; | |
358 | unsigned long lpar_rc; | |
359 | ||
360 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
361 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
362 | ||
b6d35182 SL |
363 | if(!adapter->rx_buff_pool[pool].active) { |
364 | ibmveth_rxq_harvest_buffer(adapter); | |
365 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
366 | return; | |
367 | } | |
368 | ||
1da177e4 LT |
369 | desc.desc = 0; |
370 | desc.fields.valid = 1; | |
371 | desc.fields.length = adapter->rx_buff_pool[pool].buff_size; | |
372 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; | |
373 | ||
374 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 375 | |
706c8c93 | 376 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
377 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
378 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
379 | } | |
380 | ||
381 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
382 | adapter->rx_queue.index = 0; | |
383 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
384 | } | |
385 | } | |
386 | ||
387 | static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) | |
388 | { | |
389 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
390 | ||
391 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
392 | adapter->rx_queue.index = 0; | |
393 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
394 | } | |
395 | } | |
396 | ||
397 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
398 | { | |
b6d35182 SL |
399 | int i; |
400 | ||
1da177e4 LT |
401 | if(adapter->buffer_list_addr != NULL) { |
402 | if(!dma_mapping_error(adapter->buffer_list_dma)) { | |
403 | dma_unmap_single(&adapter->vdev->dev, | |
404 | adapter->buffer_list_dma, 4096, | |
405 | DMA_BIDIRECTIONAL); | |
406 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
407 | } | |
408 | free_page((unsigned long)adapter->buffer_list_addr); | |
409 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 410 | } |
1da177e4 LT |
411 | |
412 | if(adapter->filter_list_addr != NULL) { | |
413 | if(!dma_mapping_error(adapter->filter_list_dma)) { | |
414 | dma_unmap_single(&adapter->vdev->dev, | |
415 | adapter->filter_list_dma, 4096, | |
416 | DMA_BIDIRECTIONAL); | |
417 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
418 | } | |
419 | free_page((unsigned long)adapter->filter_list_addr); | |
420 | adapter->filter_list_addr = NULL; | |
421 | } | |
422 | ||
423 | if(adapter->rx_queue.queue_addr != NULL) { | |
424 | if(!dma_mapping_error(adapter->rx_queue.queue_dma)) { | |
425 | dma_unmap_single(&adapter->vdev->dev, | |
426 | adapter->rx_queue.queue_dma, | |
427 | adapter->rx_queue.queue_len, | |
428 | DMA_BIDIRECTIONAL); | |
429 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
430 | } | |
431 | kfree(adapter->rx_queue.queue_addr); | |
432 | adapter->rx_queue.queue_addr = NULL; | |
433 | } | |
434 | ||
b6d35182 | 435 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 436 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 437 | ibmveth_free_buffer_pool(adapter, |
860f242e | 438 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
439 | } |
440 | ||
441 | static int ibmveth_open(struct net_device *netdev) | |
442 | { | |
443 | struct ibmveth_adapter *adapter = netdev->priv; | |
444 | u64 mac_address = 0; | |
b6d35182 | 445 | int rxq_entries = 1; |
1da177e4 LT |
446 | unsigned long lpar_rc; |
447 | int rc; | |
448 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 449 | int i; |
1da177e4 LT |
450 | |
451 | ibmveth_debug_printk("open starting\n"); | |
452 | ||
b6d35182 SL |
453 | for(i = 0; i<IbmVethNumBufferPools; i++) |
454 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 455 | |
1da177e4 LT |
456 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
457 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 458 | |
1da177e4 LT |
459 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
460 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
461 | ibmveth_cleanup(adapter); | |
462 | return -ENOMEM; | |
463 | } | |
464 | ||
465 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
466 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
467 | ||
468 | if(!adapter->rx_queue.queue_addr) { | |
469 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
470 | ibmveth_cleanup(adapter); | |
471 | return -ENOMEM; | |
472 | } | |
473 | ||
474 | adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev, | |
475 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); | |
476 | adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev, | |
477 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); | |
478 | adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev, | |
479 | adapter->rx_queue.queue_addr, | |
480 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
481 | ||
482 | if((dma_mapping_error(adapter->buffer_list_dma) ) || | |
483 | (dma_mapping_error(adapter->filter_list_dma)) || | |
484 | (dma_mapping_error(adapter->rx_queue.queue_dma))) { | |
485 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); | |
486 | ibmveth_cleanup(adapter); | |
487 | return -ENOMEM; | |
488 | } | |
489 | ||
490 | adapter->rx_queue.index = 0; | |
491 | adapter->rx_queue.num_slots = rxq_entries; | |
492 | adapter->rx_queue.toggle = 1; | |
493 | ||
1da177e4 LT |
494 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
495 | mac_address = mac_address >> 16; | |
496 | ||
497 | rxq_desc.desc = 0; | |
498 | rxq_desc.fields.valid = 1; | |
499 | rxq_desc.fields.length = adapter->rx_queue.queue_len; | |
500 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; | |
501 | ||
502 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
503 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
504 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
505 | ||
d7fbeba6 | 506 | |
1da177e4 LT |
507 | lpar_rc = h_register_logical_lan(adapter->vdev->unit_address, |
508 | adapter->buffer_list_dma, | |
509 | rxq_desc.desc, | |
510 | adapter->filter_list_dma, | |
511 | mac_address); | |
512 | ||
706c8c93 | 513 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 514 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
8168f902 | 515 | ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n", |
1da177e4 LT |
516 | adapter->buffer_list_dma, |
517 | adapter->filter_list_dma, | |
518 | rxq_desc.desc, | |
519 | mac_address); | |
520 | ibmveth_cleanup(adapter); | |
d7fbeba6 | 521 | return -ENONET; |
1da177e4 LT |
522 | } |
523 | ||
860f242e SL |
524 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
525 | if(!adapter->rx_buff_pool[i].active) | |
526 | continue; | |
527 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
528 | ibmveth_error_printk("unable to alloc pool\n"); | |
529 | adapter->rx_buff_pool[i].active = 0; | |
530 | ibmveth_cleanup(adapter); | |
531 | return -ENOMEM ; | |
532 | } | |
533 | } | |
534 | ||
1da177e4 LT |
535 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
536 | if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { | |
537 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); | |
538 | do { | |
539 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 540 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
541 | |
542 | ibmveth_cleanup(adapter); | |
543 | return rc; | |
544 | } | |
545 | ||
e2adbcb4 | 546 | ibmveth_debug_printk("initial replenish cycle\n"); |
6c2af71f | 547 | ibmveth_interrupt(netdev->irq, netdev, NULL); |
1da177e4 | 548 | |
e2adbcb4 | 549 | netif_start_queue(netdev); |
1da177e4 LT |
550 | |
551 | ibmveth_debug_printk("open complete\n"); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static int ibmveth_close(struct net_device *netdev) | |
557 | { | |
558 | struct ibmveth_adapter *adapter = netdev->priv; | |
559 | long lpar_rc; | |
d7fbeba6 | 560 | |
1da177e4 LT |
561 | ibmveth_debug_printk("close starting\n"); |
562 | ||
860f242e SL |
563 | if (!adapter->pool_config) |
564 | netif_stop_queue(netdev); | |
1da177e4 LT |
565 | |
566 | free_irq(netdev->irq, netdev); | |
567 | ||
1da177e4 LT |
568 | do { |
569 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 570 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 571 | |
706c8c93 | 572 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
573 | { |
574 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
575 | lpar_rc); | |
576 | } | |
577 | ||
578 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
579 | ||
580 | ibmveth_cleanup(adapter); | |
581 | ||
582 | ibmveth_debug_printk("close complete\n"); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
588 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
589 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
590 | cmd->speed = SPEED_1000; | |
591 | cmd->duplex = DUPLEX_FULL; | |
592 | cmd->port = PORT_FIBRE; | |
593 | cmd->phy_address = 0; | |
594 | cmd->transceiver = XCVR_INTERNAL; | |
595 | cmd->autoneg = AUTONEG_ENABLE; | |
596 | cmd->maxtxpkt = 0; | |
597 | cmd->maxrxpkt = 1; | |
598 | return 0; | |
599 | } | |
600 | ||
601 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
602 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
603 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
604 | } | |
605 | ||
606 | static u32 netdev_get_link(struct net_device *dev) { | |
607 | return 1; | |
608 | } | |
609 | ||
610 | static struct ethtool_ops netdev_ethtool_ops = { | |
611 | .get_drvinfo = netdev_get_drvinfo, | |
612 | .get_settings = netdev_get_settings, | |
613 | .get_link = netdev_get_link, | |
614 | .get_sg = ethtool_op_get_sg, | |
615 | .get_tx_csum = ethtool_op_get_tx_csum, | |
616 | }; | |
617 | ||
618 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
619 | { | |
620 | return -EOPNOTSUPP; | |
621 | } | |
622 | ||
623 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
624 | ||
625 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
626 | { | |
627 | struct ibmveth_adapter *adapter = netdev->priv; | |
628 | union ibmveth_buf_desc desc[IbmVethMaxSendFrags]; | |
629 | unsigned long lpar_rc; | |
630 | int nfrags = 0, curfrag; | |
631 | unsigned long correlator; | |
60296d9e | 632 | unsigned long flags; |
1da177e4 | 633 | unsigned int retry_count; |
60296d9e SL |
634 | unsigned int tx_dropped = 0; |
635 | unsigned int tx_bytes = 0; | |
636 | unsigned int tx_packets = 0; | |
637 | unsigned int tx_send_failed = 0; | |
638 | unsigned int tx_map_failed = 0; | |
639 | ||
1da177e4 LT |
640 | |
641 | if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) { | |
60296d9e SL |
642 | tx_dropped++; |
643 | goto out; | |
1da177e4 LT |
644 | } |
645 | ||
646 | memset(&desc, 0, sizeof(desc)); | |
647 | ||
648 | /* nfrags = number of frags after the initial fragment */ | |
649 | nfrags = skb_shinfo(skb)->nr_frags; | |
650 | ||
651 | if(nfrags) | |
652 | adapter->tx_multidesc_send++; | |
653 | ||
654 | /* map the initial fragment */ | |
655 | desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len; | |
656 | desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
657 | desc[0].fields.length, DMA_TO_DEVICE); | |
658 | desc[0].fields.valid = 1; | |
659 | ||
660 | if(dma_mapping_error(desc[0].fields.address)) { | |
661 | ibmveth_error_printk("tx: unable to map initial fragment\n"); | |
60296d9e SL |
662 | tx_map_failed++; |
663 | tx_dropped++; | |
664 | goto out; | |
1da177e4 LT |
665 | } |
666 | ||
667 | curfrag = nfrags; | |
668 | ||
669 | /* map fragments past the initial portion if there are any */ | |
670 | while(curfrag--) { | |
671 | skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag]; | |
672 | desc[curfrag+1].fields.address | |
673 | = dma_map_single(&adapter->vdev->dev, | |
674 | page_address(frag->page) + frag->page_offset, | |
675 | frag->size, DMA_TO_DEVICE); | |
676 | desc[curfrag+1].fields.length = frag->size; | |
677 | desc[curfrag+1].fields.valid = 1; | |
678 | ||
679 | if(dma_mapping_error(desc[curfrag+1].fields.address)) { | |
680 | ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag); | |
60296d9e SL |
681 | tx_map_failed++; |
682 | tx_dropped++; | |
1da177e4 LT |
683 | /* Free all the mappings we just created */ |
684 | while(curfrag < nfrags) { | |
685 | dma_unmap_single(&adapter->vdev->dev, | |
686 | desc[curfrag+1].fields.address, | |
687 | desc[curfrag+1].fields.length, | |
688 | DMA_TO_DEVICE); | |
689 | curfrag++; | |
690 | } | |
60296d9e | 691 | goto out; |
1da177e4 LT |
692 | } |
693 | } | |
694 | ||
695 | /* send the frame. Arbitrarily set retrycount to 1024 */ | |
696 | correlator = 0; | |
697 | retry_count = 1024; | |
698 | do { | |
699 | lpar_rc = h_send_logical_lan(adapter->vdev->unit_address, | |
700 | desc[0].desc, | |
701 | desc[1].desc, | |
702 | desc[2].desc, | |
703 | desc[3].desc, | |
704 | desc[4].desc, | |
705 | desc[5].desc, | |
706 | correlator); | |
706c8c93 | 707 | } while ((lpar_rc == H_BUSY) && (retry_count--)); |
d7fbeba6 | 708 | |
706c8c93 | 709 | if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) { |
1da177e4 LT |
710 | int i; |
711 | ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); | |
712 | for(i = 0; i < 6; i++) { | |
713 | ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i, | |
714 | desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address); | |
715 | } | |
60296d9e SL |
716 | tx_send_failed++; |
717 | tx_dropped++; | |
1da177e4 | 718 | } else { |
60296d9e SL |
719 | tx_packets++; |
720 | tx_bytes += skb->len; | |
0abe791e | 721 | netdev->trans_start = jiffies; |
1da177e4 LT |
722 | } |
723 | ||
724 | do { | |
725 | dma_unmap_single(&adapter->vdev->dev, | |
726 | desc[nfrags].fields.address, | |
727 | desc[nfrags].fields.length, DMA_TO_DEVICE); | |
728 | } while(--nfrags >= 0); | |
729 | ||
60296d9e SL |
730 | out: spin_lock_irqsave(&adapter->stats_lock, flags); |
731 | adapter->stats.tx_dropped += tx_dropped; | |
732 | adapter->stats.tx_bytes += tx_bytes; | |
733 | adapter->stats.tx_packets += tx_packets; | |
734 | adapter->tx_send_failed += tx_send_failed; | |
735 | adapter->tx_map_failed += tx_map_failed; | |
736 | spin_unlock_irqrestore(&adapter->stats_lock, flags); | |
737 | ||
1da177e4 LT |
738 | dev_kfree_skb(skb); |
739 | return 0; | |
740 | } | |
741 | ||
742 | static int ibmveth_poll(struct net_device *netdev, int *budget) | |
743 | { | |
744 | struct ibmveth_adapter *adapter = netdev->priv; | |
745 | int max_frames_to_process = netdev->quota; | |
746 | int frames_processed = 0; | |
747 | int more_work = 1; | |
748 | unsigned long lpar_rc; | |
749 | ||
750 | restart_poll: | |
751 | do { | |
752 | struct net_device *netdev = adapter->netdev; | |
753 | ||
754 | if(ibmveth_rxq_pending_buffer(adapter)) { | |
755 | struct sk_buff *skb; | |
756 | ||
757 | rmb(); | |
758 | ||
759 | if(!ibmveth_rxq_buffer_valid(adapter)) { | |
760 | wmb(); /* suggested by larson1 */ | |
761 | adapter->rx_invalid_buffer++; | |
762 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
763 | ibmveth_rxq_recycle_buffer(adapter); | |
764 | } else { | |
765 | int length = ibmveth_rxq_frame_length(adapter); | |
766 | int offset = ibmveth_rxq_frame_offset(adapter); | |
767 | skb = ibmveth_rxq_get_buffer(adapter); | |
768 | ||
769 | ibmveth_rxq_harvest_buffer(adapter); | |
770 | ||
771 | skb_reserve(skb, offset); | |
772 | skb_put(skb, length); | |
773 | skb->dev = netdev; | |
774 | skb->protocol = eth_type_trans(skb, netdev); | |
775 | ||
776 | netif_receive_skb(skb); /* send it up */ | |
777 | ||
778 | adapter->stats.rx_packets++; | |
779 | adapter->stats.rx_bytes += length; | |
780 | frames_processed++; | |
0abe791e | 781 | netdev->last_rx = jiffies; |
1da177e4 LT |
782 | } |
783 | } else { | |
784 | more_work = 0; | |
785 | } | |
786 | } while(more_work && (frames_processed < max_frames_to_process)); | |
787 | ||
e2adbcb4 | 788 | ibmveth_replenish_task(adapter); |
1da177e4 LT |
789 | |
790 | if(more_work) { | |
791 | /* more work to do - return that we are not done yet */ | |
792 | netdev->quota -= frames_processed; | |
793 | *budget -= frames_processed; | |
d7fbeba6 | 794 | return 1; |
1da177e4 LT |
795 | } |
796 | ||
797 | /* we think we are done - reenable interrupts, then check once more to make sure we are done */ | |
798 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE); | |
799 | ||
706c8c93 | 800 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 LT |
801 | |
802 | netif_rx_complete(netdev); | |
803 | ||
804 | if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed)) | |
805 | { | |
806 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); | |
706c8c93 | 807 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 LT |
808 | more_work = 1; |
809 | goto restart_poll; | |
810 | } | |
811 | ||
812 | netdev->quota -= frames_processed; | |
813 | *budget -= frames_processed; | |
814 | ||
815 | /* we really are done */ | |
816 | return 0; | |
817 | } | |
818 | ||
819 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs) | |
d7fbeba6 | 820 | { |
1da177e4 LT |
821 | struct net_device *netdev = dev_instance; |
822 | struct ibmveth_adapter *adapter = netdev->priv; | |
823 | unsigned long lpar_rc; | |
824 | ||
825 | if(netif_rx_schedule_prep(netdev)) { | |
826 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); | |
706c8c93 | 827 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 LT |
828 | __netif_rx_schedule(netdev); |
829 | } | |
830 | return IRQ_HANDLED; | |
831 | } | |
832 | ||
833 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev) | |
834 | { | |
835 | struct ibmveth_adapter *adapter = dev->priv; | |
836 | return &adapter->stats; | |
837 | } | |
838 | ||
839 | static void ibmveth_set_multicast_list(struct net_device *netdev) | |
840 | { | |
841 | struct ibmveth_adapter *adapter = netdev->priv; | |
842 | unsigned long lpar_rc; | |
843 | ||
844 | if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) { | |
845 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
846 | IbmVethMcastEnableRecv | | |
847 | IbmVethMcastDisableFiltering, | |
848 | 0); | |
706c8c93 | 849 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
850 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
851 | } | |
852 | } else { | |
853 | struct dev_mc_list *mclist = netdev->mc_list; | |
854 | int i; | |
855 | /* clear the filter table & disable filtering */ | |
856 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
857 | IbmVethMcastEnableRecv | | |
858 | IbmVethMcastDisableFiltering | | |
859 | IbmVethMcastClearFilterTable, | |
860 | 0); | |
706c8c93 | 861 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
862 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
863 | } | |
864 | /* add the addresses to the filter table */ | |
865 | for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) { | |
866 | // add the multicast address to the filter table | |
867 | unsigned long mcast_addr = 0; | |
868 | memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6); | |
869 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
870 | IbmVethMcastAddFilter, | |
871 | mcast_addr); | |
706c8c93 | 872 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
873 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
874 | } | |
875 | } | |
d7fbeba6 | 876 | |
1da177e4 LT |
877 | /* re-enable filtering */ |
878 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
879 | IbmVethMcastEnableFiltering, | |
880 | 0); | |
706c8c93 | 881 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
882 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
883 | } | |
884 | } | |
885 | } | |
886 | ||
887 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
888 | { | |
b6d35182 | 889 | struct ibmveth_adapter *adapter = dev->priv; |
860f242e | 890 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
b6d35182 | 891 | int i; |
b6d35182 | 892 | |
860f242e | 893 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 894 | return -EINVAL; |
b6d35182 | 895 | |
860f242e | 896 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 897 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
860f242e SL |
898 | if (!adapter->rx_buff_pool[i].active) |
899 | continue; | |
900 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { | |
901 | dev->mtu = new_mtu; | |
902 | return 0; | |
b6d35182 | 903 | } |
b6d35182 | 904 | } |
860f242e | 905 | return -EINVAL; |
1da177e4 LT |
906 | } |
907 | ||
908 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) | |
909 | { | |
b6d35182 | 910 | int rc, i; |
1da177e4 | 911 | struct net_device *netdev; |
b6d35182 | 912 | struct ibmveth_adapter *adapter = NULL; |
1da177e4 LT |
913 | |
914 | unsigned char *mac_addr_p; | |
915 | unsigned int *mcastFilterSize_p; | |
916 | ||
917 | ||
d7fbeba6 | 918 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
919 | dev->unit_address); |
920 | ||
921 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0); | |
922 | if(!mac_addr_p) { | |
923 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
924 | "attribute\n", __FILE__, __LINE__); | |
925 | return 0; | |
926 | } | |
d7fbeba6 | 927 | |
1da177e4 LT |
928 | mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0); |
929 | if(!mcastFilterSize_p) { | |
930 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
931 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
932 | __FILE__, __LINE__); | |
933 | return 0; | |
934 | } | |
d7fbeba6 | 935 | |
1da177e4 LT |
936 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
937 | ||
938 | if(!netdev) | |
939 | return -ENOMEM; | |
940 | ||
941 | SET_MODULE_OWNER(netdev); | |
942 | ||
943 | adapter = netdev->priv; | |
944 | memset(adapter, 0, sizeof(adapter)); | |
945 | dev->dev.driver_data = netdev; | |
946 | ||
947 | adapter->vdev = dev; | |
948 | adapter->netdev = netdev; | |
949 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 950 | adapter->pool_config = 0; |
d7fbeba6 | 951 | |
1da177e4 | 952 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 953 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 954 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 955 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 956 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 957 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
958 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
959 | ||
960 | if ((*mac_addr_p & 0x3) != 0x02) | |
961 | mac_addr_p += 2; | |
962 | ||
963 | adapter->mac_addr = 0; | |
964 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
965 | ||
966 | adapter->liobn = dev->iommu_table->it_index; | |
d7fbeba6 | 967 | |
1da177e4 LT |
968 | netdev->irq = dev->irq; |
969 | netdev->open = ibmveth_open; | |
970 | netdev->poll = ibmveth_poll; | |
971 | netdev->weight = 16; | |
972 | netdev->stop = ibmveth_close; | |
973 | netdev->hard_start_xmit = ibmveth_start_xmit; | |
974 | netdev->get_stats = ibmveth_get_stats; | |
975 | netdev->set_multicast_list = ibmveth_set_multicast_list; | |
976 | netdev->do_ioctl = ibmveth_ioctl; | |
977 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
978 | netdev->change_mtu = ibmveth_change_mtu; | |
979 | SET_NETDEV_DEV(netdev, &dev->dev); | |
d7fbeba6 | 980 | netdev->features |= NETIF_F_LLTX; |
60296d9e | 981 | spin_lock_init(&adapter->stats_lock); |
1da177e4 LT |
982 | |
983 | memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); | |
984 | ||
860f242e SL |
985 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
986 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
d7fbeba6 JG |
987 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
988 | pool_count[i], pool_size[i], | |
860f242e SL |
989 | pool_active[i]); |
990 | kobj->parent = &dev->dev.kobj; | |
991 | sprintf(kobj->name, "pool%d", i); | |
992 | kobj->ktype = &ktype_veth_pool; | |
993 | kobject_register(kobj); | |
994 | } | |
1da177e4 LT |
995 | |
996 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
997 | ||
1da177e4 LT |
998 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
999 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1000 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1001 | ||
1da177e4 LT |
1002 | ibmveth_debug_printk("registering netdev...\n"); |
1003 | ||
1004 | rc = register_netdev(netdev); | |
1005 | ||
1006 | if(rc) { | |
1007 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1008 | free_netdev(netdev); | |
1009 | return rc; | |
1010 | } | |
1011 | ||
1012 | ibmveth_debug_printk("registered\n"); | |
1013 | ||
1014 | ibmveth_proc_register_adapter(adapter); | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1020 | { | |
1021 | struct net_device *netdev = dev->dev.driver_data; | |
1022 | struct ibmveth_adapter *adapter = netdev->priv; | |
860f242e SL |
1023 | int i; |
1024 | ||
1025 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
1026 | kobject_unregister(&adapter->rx_buff_pool[i].kobj); | |
1da177e4 LT |
1027 | |
1028 | unregister_netdev(netdev); | |
1029 | ||
1030 | ibmveth_proc_unregister_adapter(adapter); | |
1031 | ||
1032 | free_netdev(netdev); | |
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | #ifdef CONFIG_PROC_FS | |
1037 | static void ibmveth_proc_register_driver(void) | |
1038 | { | |
66600221 | 1039 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL); |
1da177e4 LT |
1040 | if (ibmveth_proc_dir) { |
1041 | SET_MODULE_OWNER(ibmveth_proc_dir); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | static void ibmveth_proc_unregister_driver(void) | |
1046 | { | |
66600221 | 1047 | remove_proc_entry(IBMVETH_PROC_DIR, NULL); |
1da177e4 LT |
1048 | } |
1049 | ||
d7fbeba6 | 1050 | static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4 LT |
1051 | { |
1052 | if (*pos == 0) { | |
1053 | return (void *)1; | |
1054 | } else { | |
1055 | return NULL; | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1060 | { | |
1061 | ++*pos; | |
1062 | return NULL; | |
1063 | } | |
1064 | ||
d7fbeba6 | 1065 | static void ibmveth_seq_stop(struct seq_file *seq, void *v) |
1da177e4 LT |
1066 | { |
1067 | } | |
1068 | ||
d7fbeba6 | 1069 | static int ibmveth_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1070 | { |
1071 | struct ibmveth_adapter *adapter = seq->private; | |
1072 | char *current_mac = ((char*) &adapter->netdev->dev_addr); | |
1073 | char *firmware_mac = ((char*) &adapter->mac_addr) ; | |
1074 | ||
1075 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1076 | |
1da177e4 LT |
1077 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
1078 | seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn); | |
1079 | seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1080 | current_mac[0], current_mac[1], current_mac[2], | |
1081 | current_mac[3], current_mac[4], current_mac[5]); | |
1082 | seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1083 | firmware_mac[0], firmware_mac[1], firmware_mac[2], | |
1084 | firmware_mac[3], firmware_mac[4], firmware_mac[5]); | |
d7fbeba6 | 1085 | |
1da177e4 LT |
1086 | seq_printf(seq, "\nAdapter Statistics:\n"); |
1087 | seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized); | |
1088 | seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send); | |
1089 | seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed); | |
1090 | seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed); | |
1091 | seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed); | |
1092 | seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles); | |
1093 | seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem); | |
1094 | seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure); | |
1095 | seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer); | |
1096 | seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1097 | |
1da177e4 LT |
1098 | return 0; |
1099 | } | |
1100 | static struct seq_operations ibmveth_seq_ops = { | |
1101 | .start = ibmveth_seq_start, | |
1102 | .next = ibmveth_seq_next, | |
1103 | .stop = ibmveth_seq_stop, | |
1104 | .show = ibmveth_seq_show, | |
1105 | }; | |
1106 | ||
1107 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1108 | { | |
1109 | struct seq_file *seq; | |
1110 | struct proc_dir_entry *proc; | |
1111 | int rc; | |
1112 | ||
1113 | rc = seq_open(file, &ibmveth_seq_ops); | |
1114 | if (!rc) { | |
1115 | /* recover the pointer buried in proc_dir_entry data */ | |
1116 | seq = file->private_data; | |
1117 | proc = PDE(inode); | |
1118 | seq->private = proc->data; | |
1119 | } | |
1120 | return rc; | |
1121 | } | |
1122 | ||
1123 | static struct file_operations ibmveth_proc_fops = { | |
1124 | .owner = THIS_MODULE, | |
1125 | .open = ibmveth_proc_open, | |
1126 | .read = seq_read, | |
1127 | .llseek = seq_lseek, | |
1128 | .release = seq_release, | |
1129 | }; | |
1130 | ||
1131 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1132 | { | |
1133 | struct proc_dir_entry *entry; | |
1134 | if (ibmveth_proc_dir) { | |
1135 | entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir); | |
1136 | if (!entry) { | |
1137 | ibmveth_error_printk("Cannot create adapter proc entry"); | |
1138 | } else { | |
1139 | entry->data = (void *) adapter; | |
1140 | entry->proc_fops = &ibmveth_proc_fops; | |
1141 | SET_MODULE_OWNER(entry); | |
1142 | } | |
1143 | } | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1148 | { | |
1149 | if (ibmveth_proc_dir) { | |
1150 | remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1155 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1156 | { |
1157 | } | |
1158 | ||
d7fbeba6 | 1159 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1160 | { |
1161 | } | |
1162 | static void ibmveth_proc_register_driver(void) | |
1163 | { | |
1164 | } | |
1165 | ||
1166 | static void ibmveth_proc_unregister_driver(void) | |
1167 | { | |
1168 | } | |
1169 | #endif /* CONFIG_PROC_FS */ | |
1170 | ||
860f242e SL |
1171 | static struct attribute veth_active_attr; |
1172 | static struct attribute veth_num_attr; | |
1173 | static struct attribute veth_size_attr; | |
1174 | ||
1175 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1176 | struct attribute * attr, char * buf) | |
1177 | { | |
d7fbeba6 | 1178 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1179 | struct ibmveth_buff_pool, |
1180 | kobj); | |
1181 | ||
1182 | if (attr == &veth_active_attr) | |
1183 | return sprintf(buf, "%d\n", pool->active); | |
1184 | else if (attr == &veth_num_attr) | |
1185 | return sprintf(buf, "%d\n", pool->size); | |
1186 | else if (attr == &veth_size_attr) | |
1187 | return sprintf(buf, "%d\n", pool->buff_size); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1192 | const char * buf, size_t count) | |
1193 | { | |
d7fbeba6 | 1194 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1195 | struct ibmveth_buff_pool, |
1196 | kobj); | |
d7fbeba6 | 1197 | struct net_device *netdev = |
860f242e SL |
1198 | container_of(kobj->parent, struct device, kobj)->driver_data; |
1199 | struct ibmveth_adapter *adapter = netdev->priv; | |
1200 | long value = simple_strtol(buf, NULL, 10); | |
1201 | long rc; | |
1202 | ||
1203 | if (attr == &veth_active_attr) { | |
1204 | if (value && !pool->active) { | |
1205 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1206 | ibmveth_error_printk("unable to alloc pool\n"); | |
1207 | return -ENOMEM; | |
1208 | } | |
1209 | pool->active = 1; | |
1210 | adapter->pool_config = 1; | |
1211 | ibmveth_close(netdev); | |
1212 | adapter->pool_config = 0; | |
1213 | if ((rc = ibmveth_open(netdev))) | |
1214 | return rc; | |
1215 | } else if (!value && pool->active) { | |
1216 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1217 | int i; | |
1218 | /* Make sure there is a buffer pool with buffers that | |
1219 | can hold a packet of the size of the MTU */ | |
1220 | for(i = 0; i<IbmVethNumBufferPools; i++) { | |
1221 | if (pool == &adapter->rx_buff_pool[i]) | |
1222 | continue; | |
1223 | if (!adapter->rx_buff_pool[i].active) | |
1224 | continue; | |
1225 | if (mtu < adapter->rx_buff_pool[i].buff_size) { | |
1226 | pool->active = 0; | |
1227 | h_free_logical_lan_buffer(adapter-> | |
1228 | vdev-> | |
1229 | unit_address, | |
1230 | pool-> | |
1231 | buff_size); | |
1232 | } | |
1233 | } | |
1234 | if (pool->active) { | |
1235 | ibmveth_error_printk("no active pool >= MTU\n"); | |
1236 | return -EPERM; | |
1237 | } | |
1238 | } | |
1239 | } else if (attr == &veth_num_attr) { | |
1240 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1241 | return -EINVAL; | |
1242 | else { | |
1243 | adapter->pool_config = 1; | |
1244 | ibmveth_close(netdev); | |
1245 | adapter->pool_config = 0; | |
1246 | pool->size = value; | |
1247 | if ((rc = ibmveth_open(netdev))) | |
1248 | return rc; | |
1249 | } | |
1250 | } else if (attr == &veth_size_attr) { | |
1251 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1252 | return -EINVAL; | |
1253 | else { | |
1254 | adapter->pool_config = 1; | |
1255 | ibmveth_close(netdev); | |
1256 | adapter->pool_config = 0; | |
1257 | pool->buff_size = value; | |
1258 | if ((rc = ibmveth_open(netdev))) | |
1259 | return rc; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | /* kick the interrupt handler to allocate/deallocate pools */ | |
1264 | ibmveth_interrupt(netdev->irq, netdev, NULL); | |
1265 | return count; | |
1266 | } | |
1267 | ||
1268 | ||
1269 | #define ATTR(_name, _mode) \ | |
1270 | struct attribute veth_##_name##_attr = { \ | |
1271 | .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \ | |
1272 | }; | |
1273 | ||
1274 | static ATTR(active, 0644); | |
1275 | static ATTR(num, 0644); | |
1276 | static ATTR(size, 0644); | |
1277 | ||
1278 | static struct attribute * veth_pool_attrs[] = { | |
1279 | &veth_active_attr, | |
1280 | &veth_num_attr, | |
1281 | &veth_size_attr, | |
1282 | NULL, | |
1283 | }; | |
1284 | ||
1285 | static struct sysfs_ops veth_pool_ops = { | |
1286 | .show = veth_pool_show, | |
1287 | .store = veth_pool_store, | |
1288 | }; | |
1289 | ||
1290 | static struct kobj_type ktype_veth_pool = { | |
1291 | .release = NULL, | |
1292 | .sysfs_ops = &veth_pool_ops, | |
1293 | .default_attrs = veth_pool_attrs, | |
1294 | }; | |
1295 | ||
1296 | ||
1da177e4 LT |
1297 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1298 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1299 | { "", "" } |
1da177e4 | 1300 | }; |
1da177e4 LT |
1301 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1302 | ||
1303 | static struct vio_driver ibmveth_driver = { | |
6fdf5392 SR |
1304 | .id_table = ibmveth_device_table, |
1305 | .probe = ibmveth_probe, | |
1306 | .remove = ibmveth_remove, | |
1307 | .driver = { | |
1308 | .name = ibmveth_driver_name, | |
915124d8 | 1309 | .owner = THIS_MODULE, |
6fdf5392 | 1310 | } |
1da177e4 LT |
1311 | }; |
1312 | ||
1313 | static int __init ibmveth_module_init(void) | |
1314 | { | |
1315 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1316 | ||
1317 | ibmveth_proc_register_driver(); | |
1318 | ||
1319 | return vio_register_driver(&ibmveth_driver); | |
1320 | } | |
1321 | ||
1322 | static void __exit ibmveth_module_exit(void) | |
1323 | { | |
1324 | vio_unregister_driver(&ibmveth_driver); | |
1325 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1326 | } |
1da177e4 LT |
1327 | |
1328 | module_init(ibmveth_module_init); | |
1329 | module_exit(ibmveth_module_exit); |