Commit | Line | Data |
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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 | ||
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 | ||
84 | static int ibmveth_open(struct net_device *dev); | |
85 | static int ibmveth_close(struct net_device *dev); | |
86 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
87 | static int ibmveth_poll(struct net_device *dev, int *budget); | |
88 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
89 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev); | |
90 | static void ibmveth_set_multicast_list(struct net_device *dev); | |
91 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
92 | static void ibmveth_proc_register_driver(void); | |
93 | static void ibmveth_proc_unregister_driver(void); | |
94 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
95 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
7d12e780 | 96 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
b6d35182 | 97 | static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
860f242e | 98 | static struct kobj_type ktype_veth_pool; |
1da177e4 LT |
99 | |
100 | #ifdef CONFIG_PROC_FS | |
66600221 | 101 | #define IBMVETH_PROC_DIR "net/ibmveth" |
1da177e4 LT |
102 | static struct proc_dir_entry *ibmveth_proc_dir; |
103 | #endif | |
104 | ||
105 | static const char ibmveth_driver_name[] = "ibmveth"; | |
106 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
107 | #define ibmveth_driver_version "1.03" | |
108 | ||
109 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
110 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
111 | MODULE_LICENSE("GPL"); | |
112 | MODULE_VERSION(ibmveth_driver_version); | |
113 | ||
114 | /* simple methods of getting data from the current rxq entry */ | |
115 | static 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 | ||
120 | static 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 | ||
125 | static 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 | ||
130 | static 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 | 136 | 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 |
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 */ | |
146 | static 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 | */ | |
191 | static 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 | ||
047a66d4 DG |
215 | free_index = pool->consumer_index; |
216 | pool->consumer_index = (pool->consumer_index + 1) % pool->size; | |
1da177e4 | 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 | 241 | pool->skbuff[index] = NULL; |
751ae21c SL |
242 | if (pool->consumer_index == 0) |
243 | pool->consumer_index = pool->size - 1; | |
244 | else | |
245 | pool->consumer_index--; | |
1da177e4 LT |
246 | dma_unmap_single(&adapter->vdev->dev, |
247 | pool->dma_addr[index], pool->buff_size, | |
248 | DMA_FROM_DEVICE); | |
249 | dev_kfree_skb_any(skb); | |
250 | adapter->replenish_add_buff_failure++; | |
251 | break; | |
252 | } else { | |
253 | buffers_added++; | |
254 | adapter->replenish_add_buff_success++; | |
255 | } | |
256 | } | |
d7fbeba6 | 257 | |
1da177e4 LT |
258 | mb(); |
259 | atomic_add(buffers_added, &(pool->available)); | |
260 | } | |
261 | ||
e2adbcb4 | 262 | /* replenish routine */ |
d7fbeba6 | 263 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 264 | { |
b6d35182 SL |
265 | int i; |
266 | ||
1da177e4 LT |
267 | adapter->replenish_task_cycles++; |
268 | ||
b6d35182 SL |
269 | for(i = 0; i < IbmVethNumBufferPools; i++) |
270 | if(adapter->rx_buff_pool[i].active) | |
d7fbeba6 | 271 | ibmveth_replenish_buffer_pool(adapter, |
b6d35182 | 272 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
273 | |
274 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
275 | } |
276 | ||
277 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
278 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
279 | { | |
280 | int i; | |
281 | ||
b4558ea9 JJ |
282 | kfree(pool->free_map); |
283 | pool->free_map = NULL; | |
1da177e4 LT |
284 | |
285 | if(pool->skbuff && pool->dma_addr) { | |
286 | for(i = 0; i < pool->size; ++i) { | |
287 | struct sk_buff *skb = pool->skbuff[i]; | |
288 | if(skb) { | |
289 | dma_unmap_single(&adapter->vdev->dev, | |
290 | pool->dma_addr[i], | |
291 | pool->buff_size, | |
292 | DMA_FROM_DEVICE); | |
293 | dev_kfree_skb_any(skb); | |
294 | pool->skbuff[i] = NULL; | |
295 | } | |
296 | } | |
297 | } | |
298 | ||
299 | if(pool->dma_addr) { | |
300 | kfree(pool->dma_addr); | |
301 | pool->dma_addr = NULL; | |
302 | } | |
303 | ||
304 | if(pool->skbuff) { | |
305 | kfree(pool->skbuff); | |
306 | pool->skbuff = NULL; | |
307 | } | |
308 | } | |
309 | ||
310 | /* remove a buffer from a pool */ | |
311 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
312 | { | |
313 | unsigned int pool = correlator >> 32; | |
314 | unsigned int index = correlator & 0xffffffffUL; | |
315 | unsigned int free_index; | |
316 | struct sk_buff *skb; | |
317 | ||
318 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
319 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
320 | ||
321 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
322 | ||
323 | ibmveth_assert(skb != NULL); | |
324 | ||
325 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
326 | ||
327 | dma_unmap_single(&adapter->vdev->dev, | |
328 | adapter->rx_buff_pool[pool].dma_addr[index], | |
329 | adapter->rx_buff_pool[pool].buff_size, | |
330 | DMA_FROM_DEVICE); | |
331 | ||
047a66d4 DG |
332 | free_index = adapter->rx_buff_pool[pool].producer_index; |
333 | adapter->rx_buff_pool[pool].producer_index | |
334 | = (adapter->rx_buff_pool[pool].producer_index + 1) | |
335 | % adapter->rx_buff_pool[pool].size; | |
1da177e4 LT |
336 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
337 | ||
338 | mb(); | |
339 | ||
340 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
341 | } | |
342 | ||
343 | /* get the current buffer on the rx queue */ | |
344 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
345 | { | |
346 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
347 | unsigned int pool = correlator >> 32; | |
348 | unsigned int index = correlator & 0xffffffffUL; | |
349 | ||
350 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
351 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
352 | ||
353 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
354 | } | |
355 | ||
356 | /* recycle the current buffer on the rx queue */ | |
357 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
358 | { | |
359 | u32 q_index = adapter->rx_queue.index; | |
360 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
361 | unsigned int pool = correlator >> 32; | |
362 | unsigned int index = correlator & 0xffffffffUL; | |
363 | union ibmveth_buf_desc desc; | |
364 | unsigned long lpar_rc; | |
365 | ||
366 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
367 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
368 | ||
b6d35182 SL |
369 | if(!adapter->rx_buff_pool[pool].active) { |
370 | ibmveth_rxq_harvest_buffer(adapter); | |
371 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
372 | return; | |
373 | } | |
374 | ||
1da177e4 LT |
375 | desc.desc = 0; |
376 | desc.fields.valid = 1; | |
377 | desc.fields.length = adapter->rx_buff_pool[pool].buff_size; | |
378 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; | |
379 | ||
380 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 381 | |
706c8c93 | 382 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
383 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
384 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
385 | } | |
386 | ||
387 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
388 | adapter->rx_queue.index = 0; | |
389 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
390 | } | |
391 | } | |
392 | ||
393 | static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) | |
394 | { | |
395 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
396 | ||
397 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
398 | adapter->rx_queue.index = 0; | |
399 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
400 | } | |
401 | } | |
402 | ||
403 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
404 | { | |
b6d35182 SL |
405 | int i; |
406 | ||
1da177e4 LT |
407 | if(adapter->buffer_list_addr != NULL) { |
408 | if(!dma_mapping_error(adapter->buffer_list_dma)) { | |
409 | dma_unmap_single(&adapter->vdev->dev, | |
410 | adapter->buffer_list_dma, 4096, | |
411 | DMA_BIDIRECTIONAL); | |
412 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
413 | } | |
414 | free_page((unsigned long)adapter->buffer_list_addr); | |
415 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 416 | } |
1da177e4 LT |
417 | |
418 | if(adapter->filter_list_addr != NULL) { | |
419 | if(!dma_mapping_error(adapter->filter_list_dma)) { | |
420 | dma_unmap_single(&adapter->vdev->dev, | |
421 | adapter->filter_list_dma, 4096, | |
422 | DMA_BIDIRECTIONAL); | |
423 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
424 | } | |
425 | free_page((unsigned long)adapter->filter_list_addr); | |
426 | adapter->filter_list_addr = NULL; | |
427 | } | |
428 | ||
429 | if(adapter->rx_queue.queue_addr != NULL) { | |
430 | if(!dma_mapping_error(adapter->rx_queue.queue_dma)) { | |
431 | dma_unmap_single(&adapter->vdev->dev, | |
432 | adapter->rx_queue.queue_dma, | |
433 | adapter->rx_queue.queue_len, | |
434 | DMA_BIDIRECTIONAL); | |
435 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
436 | } | |
437 | kfree(adapter->rx_queue.queue_addr); | |
438 | adapter->rx_queue.queue_addr = NULL; | |
439 | } | |
440 | ||
b6d35182 | 441 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 442 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 443 | ibmveth_free_buffer_pool(adapter, |
860f242e | 444 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
445 | } |
446 | ||
bbedefcc ME |
447 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
448 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
449 | { | |
450 | int rc, try_again = 1; | |
451 | ||
452 | /* After a kexec the adapter will still be open, so our attempt to | |
453 | * open it will fail. So if we get a failure we free the adapter and | |
454 | * try again, but only once. */ | |
455 | retry: | |
456 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
457 | adapter->buffer_list_dma, rxq_desc.desc, | |
458 | adapter->filter_list_dma, mac_address); | |
459 | ||
460 | if (rc != H_SUCCESS && try_again) { | |
461 | do { | |
462 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
463 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
464 | ||
465 | try_again = 0; | |
466 | goto retry; | |
467 | } | |
468 | ||
469 | return rc; | |
470 | } | |
471 | ||
1da177e4 LT |
472 | static int ibmveth_open(struct net_device *netdev) |
473 | { | |
474 | struct ibmveth_adapter *adapter = netdev->priv; | |
475 | u64 mac_address = 0; | |
b6d35182 | 476 | int rxq_entries = 1; |
1da177e4 LT |
477 | unsigned long lpar_rc; |
478 | int rc; | |
479 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 480 | int i; |
1da177e4 LT |
481 | |
482 | ibmveth_debug_printk("open starting\n"); | |
483 | ||
b6d35182 SL |
484 | for(i = 0; i<IbmVethNumBufferPools; i++) |
485 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 486 | |
1da177e4 LT |
487 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
488 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 489 | |
1da177e4 LT |
490 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
491 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
492 | ibmveth_cleanup(adapter); | |
493 | return -ENOMEM; | |
494 | } | |
495 | ||
496 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
497 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
498 | ||
499 | if(!adapter->rx_queue.queue_addr) { | |
500 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
501 | ibmveth_cleanup(adapter); | |
502 | return -ENOMEM; | |
503 | } | |
504 | ||
505 | adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev, | |
506 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); | |
507 | adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev, | |
508 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); | |
509 | adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev, | |
510 | adapter->rx_queue.queue_addr, | |
511 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
512 | ||
513 | if((dma_mapping_error(adapter->buffer_list_dma) ) || | |
514 | (dma_mapping_error(adapter->filter_list_dma)) || | |
515 | (dma_mapping_error(adapter->rx_queue.queue_dma))) { | |
516 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); | |
517 | ibmveth_cleanup(adapter); | |
518 | return -ENOMEM; | |
519 | } | |
520 | ||
521 | adapter->rx_queue.index = 0; | |
522 | adapter->rx_queue.num_slots = rxq_entries; | |
523 | adapter->rx_queue.toggle = 1; | |
524 | ||
1da177e4 LT |
525 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
526 | mac_address = mac_address >> 16; | |
527 | ||
528 | rxq_desc.desc = 0; | |
529 | rxq_desc.fields.valid = 1; | |
530 | rxq_desc.fields.length = adapter->rx_queue.queue_len; | |
531 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; | |
532 | ||
533 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
534 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
535 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
536 | ||
4347ef15 SL |
537 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
538 | ||
bbedefcc | 539 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 540 | |
706c8c93 | 541 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 542 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
8168f902 | 543 | ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n", |
1da177e4 LT |
544 | adapter->buffer_list_dma, |
545 | adapter->filter_list_dma, | |
546 | rxq_desc.desc, | |
547 | mac_address); | |
548 | ibmveth_cleanup(adapter); | |
d7fbeba6 | 549 | return -ENONET; |
1da177e4 LT |
550 | } |
551 | ||
860f242e SL |
552 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
553 | if(!adapter->rx_buff_pool[i].active) | |
554 | continue; | |
555 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
556 | ibmveth_error_printk("unable to alloc pool\n"); | |
557 | adapter->rx_buff_pool[i].active = 0; | |
558 | ibmveth_cleanup(adapter); | |
559 | return -ENOMEM ; | |
560 | } | |
561 | } | |
562 | ||
1da177e4 LT |
563 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
564 | if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { | |
565 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); | |
566 | do { | |
567 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 568 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
569 | |
570 | ibmveth_cleanup(adapter); | |
571 | return rc; | |
572 | } | |
573 | ||
e2adbcb4 | 574 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 575 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 576 | |
e2adbcb4 | 577 | netif_start_queue(netdev); |
1da177e4 LT |
578 | |
579 | ibmveth_debug_printk("open complete\n"); | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | static int ibmveth_close(struct net_device *netdev) | |
585 | { | |
586 | struct ibmveth_adapter *adapter = netdev->priv; | |
587 | long lpar_rc; | |
d7fbeba6 | 588 | |
1da177e4 LT |
589 | ibmveth_debug_printk("close starting\n"); |
590 | ||
860f242e SL |
591 | if (!adapter->pool_config) |
592 | netif_stop_queue(netdev); | |
1da177e4 LT |
593 | |
594 | free_irq(netdev->irq, netdev); | |
595 | ||
1da177e4 LT |
596 | do { |
597 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 598 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 599 | |
706c8c93 | 600 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
601 | { |
602 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
603 | lpar_rc); | |
604 | } | |
605 | ||
606 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
607 | ||
608 | ibmveth_cleanup(adapter); | |
609 | ||
610 | ibmveth_debug_printk("close complete\n"); | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
616 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
617 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
618 | cmd->speed = SPEED_1000; | |
619 | cmd->duplex = DUPLEX_FULL; | |
620 | cmd->port = PORT_FIBRE; | |
621 | cmd->phy_address = 0; | |
622 | cmd->transceiver = XCVR_INTERNAL; | |
623 | cmd->autoneg = AUTONEG_ENABLE; | |
624 | cmd->maxtxpkt = 0; | |
625 | cmd->maxrxpkt = 1; | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
630 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
631 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
632 | } | |
633 | ||
634 | static u32 netdev_get_link(struct net_device *dev) { | |
635 | return 1; | |
636 | } | |
637 | ||
7282d491 | 638 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
639 | .get_drvinfo = netdev_get_drvinfo, |
640 | .get_settings = netdev_get_settings, | |
641 | .get_link = netdev_get_link, | |
642 | .get_sg = ethtool_op_get_sg, | |
643 | .get_tx_csum = ethtool_op_get_tx_csum, | |
644 | }; | |
645 | ||
646 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
647 | { | |
648 | return -EOPNOTSUPP; | |
649 | } | |
650 | ||
651 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
652 | ||
653 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
654 | { | |
655 | struct ibmveth_adapter *adapter = netdev->priv; | |
656 | union ibmveth_buf_desc desc[IbmVethMaxSendFrags]; | |
657 | unsigned long lpar_rc; | |
658 | int nfrags = 0, curfrag; | |
659 | unsigned long correlator; | |
60296d9e | 660 | unsigned long flags; |
1da177e4 | 661 | unsigned int retry_count; |
60296d9e SL |
662 | unsigned int tx_dropped = 0; |
663 | unsigned int tx_bytes = 0; | |
664 | unsigned int tx_packets = 0; | |
665 | unsigned int tx_send_failed = 0; | |
666 | unsigned int tx_map_failed = 0; | |
667 | ||
1da177e4 LT |
668 | |
669 | if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) { | |
60296d9e SL |
670 | tx_dropped++; |
671 | goto out; | |
1da177e4 LT |
672 | } |
673 | ||
674 | memset(&desc, 0, sizeof(desc)); | |
675 | ||
676 | /* nfrags = number of frags after the initial fragment */ | |
677 | nfrags = skb_shinfo(skb)->nr_frags; | |
678 | ||
679 | if(nfrags) | |
680 | adapter->tx_multidesc_send++; | |
681 | ||
682 | /* map the initial fragment */ | |
683 | desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len; | |
684 | desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
685 | desc[0].fields.length, DMA_TO_DEVICE); | |
686 | desc[0].fields.valid = 1; | |
687 | ||
688 | if(dma_mapping_error(desc[0].fields.address)) { | |
689 | ibmveth_error_printk("tx: unable to map initial fragment\n"); | |
60296d9e SL |
690 | tx_map_failed++; |
691 | tx_dropped++; | |
692 | goto out; | |
1da177e4 LT |
693 | } |
694 | ||
695 | curfrag = nfrags; | |
696 | ||
697 | /* map fragments past the initial portion if there are any */ | |
698 | while(curfrag--) { | |
699 | skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag]; | |
700 | desc[curfrag+1].fields.address | |
701 | = dma_map_single(&adapter->vdev->dev, | |
702 | page_address(frag->page) + frag->page_offset, | |
703 | frag->size, DMA_TO_DEVICE); | |
704 | desc[curfrag+1].fields.length = frag->size; | |
705 | desc[curfrag+1].fields.valid = 1; | |
706 | ||
707 | if(dma_mapping_error(desc[curfrag+1].fields.address)) { | |
708 | ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag); | |
60296d9e SL |
709 | tx_map_failed++; |
710 | tx_dropped++; | |
1da177e4 LT |
711 | /* Free all the mappings we just created */ |
712 | while(curfrag < nfrags) { | |
713 | dma_unmap_single(&adapter->vdev->dev, | |
714 | desc[curfrag+1].fields.address, | |
715 | desc[curfrag+1].fields.length, | |
716 | DMA_TO_DEVICE); | |
717 | curfrag++; | |
718 | } | |
60296d9e | 719 | goto out; |
1da177e4 LT |
720 | } |
721 | } | |
722 | ||
723 | /* send the frame. Arbitrarily set retrycount to 1024 */ | |
724 | correlator = 0; | |
725 | retry_count = 1024; | |
726 | do { | |
727 | lpar_rc = h_send_logical_lan(adapter->vdev->unit_address, | |
728 | desc[0].desc, | |
729 | desc[1].desc, | |
730 | desc[2].desc, | |
731 | desc[3].desc, | |
732 | desc[4].desc, | |
733 | desc[5].desc, | |
b9377ffc AB |
734 | correlator, |
735 | &correlator); | |
706c8c93 | 736 | } while ((lpar_rc == H_BUSY) && (retry_count--)); |
d7fbeba6 | 737 | |
706c8c93 | 738 | if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) { |
1da177e4 LT |
739 | int i; |
740 | ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); | |
741 | for(i = 0; i < 6; i++) { | |
742 | ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i, | |
743 | desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address); | |
744 | } | |
60296d9e SL |
745 | tx_send_failed++; |
746 | tx_dropped++; | |
1da177e4 | 747 | } else { |
60296d9e SL |
748 | tx_packets++; |
749 | tx_bytes += skb->len; | |
0abe791e | 750 | netdev->trans_start = jiffies; |
1da177e4 LT |
751 | } |
752 | ||
753 | do { | |
754 | dma_unmap_single(&adapter->vdev->dev, | |
755 | desc[nfrags].fields.address, | |
756 | desc[nfrags].fields.length, DMA_TO_DEVICE); | |
757 | } while(--nfrags >= 0); | |
758 | ||
60296d9e SL |
759 | out: spin_lock_irqsave(&adapter->stats_lock, flags); |
760 | adapter->stats.tx_dropped += tx_dropped; | |
761 | adapter->stats.tx_bytes += tx_bytes; | |
762 | adapter->stats.tx_packets += tx_packets; | |
763 | adapter->tx_send_failed += tx_send_failed; | |
764 | adapter->tx_map_failed += tx_map_failed; | |
765 | spin_unlock_irqrestore(&adapter->stats_lock, flags); | |
766 | ||
1da177e4 LT |
767 | dev_kfree_skb(skb); |
768 | return 0; | |
769 | } | |
770 | ||
771 | static int ibmveth_poll(struct net_device *netdev, int *budget) | |
772 | { | |
773 | struct ibmveth_adapter *adapter = netdev->priv; | |
774 | int max_frames_to_process = netdev->quota; | |
775 | int frames_processed = 0; | |
776 | int more_work = 1; | |
777 | unsigned long lpar_rc; | |
778 | ||
779 | restart_poll: | |
780 | do { | |
781 | struct net_device *netdev = adapter->netdev; | |
782 | ||
783 | if(ibmveth_rxq_pending_buffer(adapter)) { | |
784 | struct sk_buff *skb; | |
785 | ||
786 | rmb(); | |
787 | ||
788 | if(!ibmveth_rxq_buffer_valid(adapter)) { | |
789 | wmb(); /* suggested by larson1 */ | |
790 | adapter->rx_invalid_buffer++; | |
791 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
792 | ibmveth_rxq_recycle_buffer(adapter); | |
793 | } else { | |
794 | int length = ibmveth_rxq_frame_length(adapter); | |
795 | int offset = ibmveth_rxq_frame_offset(adapter); | |
796 | skb = ibmveth_rxq_get_buffer(adapter); | |
797 | ||
798 | ibmveth_rxq_harvest_buffer(adapter); | |
799 | ||
800 | skb_reserve(skb, offset); | |
801 | skb_put(skb, length); | |
802 | skb->dev = netdev; | |
803 | skb->protocol = eth_type_trans(skb, netdev); | |
804 | ||
805 | netif_receive_skb(skb); /* send it up */ | |
806 | ||
807 | adapter->stats.rx_packets++; | |
808 | adapter->stats.rx_bytes += length; | |
809 | frames_processed++; | |
0abe791e | 810 | netdev->last_rx = jiffies; |
1da177e4 LT |
811 | } |
812 | } else { | |
813 | more_work = 0; | |
814 | } | |
815 | } while(more_work && (frames_processed < max_frames_to_process)); | |
816 | ||
e2adbcb4 | 817 | ibmveth_replenish_task(adapter); |
1da177e4 LT |
818 | |
819 | if(more_work) { | |
820 | /* more work to do - return that we are not done yet */ | |
821 | netdev->quota -= frames_processed; | |
822 | *budget -= frames_processed; | |
d7fbeba6 | 823 | return 1; |
1da177e4 LT |
824 | } |
825 | ||
826 | /* we think we are done - reenable interrupts, then check once more to make sure we are done */ | |
827 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE); | |
828 | ||
706c8c93 | 829 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 LT |
830 | |
831 | netif_rx_complete(netdev); | |
832 | ||
833 | if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed)) | |
834 | { | |
835 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); | |
706c8c93 | 836 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 LT |
837 | more_work = 1; |
838 | goto restart_poll; | |
839 | } | |
840 | ||
841 | netdev->quota -= frames_processed; | |
842 | *budget -= frames_processed; | |
843 | ||
844 | /* we really are done */ | |
845 | return 0; | |
846 | } | |
847 | ||
7d12e780 | 848 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 849 | { |
1da177e4 LT |
850 | struct net_device *netdev = dev_instance; |
851 | struct ibmveth_adapter *adapter = netdev->priv; | |
852 | unsigned long lpar_rc; | |
853 | ||
854 | if(netif_rx_schedule_prep(netdev)) { | |
855 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); | |
706c8c93 | 856 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 LT |
857 | __netif_rx_schedule(netdev); |
858 | } | |
859 | return IRQ_HANDLED; | |
860 | } | |
861 | ||
862 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev) | |
863 | { | |
864 | struct ibmveth_adapter *adapter = dev->priv; | |
865 | return &adapter->stats; | |
866 | } | |
867 | ||
868 | static void ibmveth_set_multicast_list(struct net_device *netdev) | |
869 | { | |
870 | struct ibmveth_adapter *adapter = netdev->priv; | |
871 | unsigned long lpar_rc; | |
872 | ||
873 | if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) { | |
874 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
875 | IbmVethMcastEnableRecv | | |
876 | IbmVethMcastDisableFiltering, | |
877 | 0); | |
706c8c93 | 878 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
879 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
880 | } | |
881 | } else { | |
882 | struct dev_mc_list *mclist = netdev->mc_list; | |
883 | int i; | |
884 | /* clear the filter table & disable filtering */ | |
885 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
886 | IbmVethMcastEnableRecv | | |
887 | IbmVethMcastDisableFiltering | | |
888 | IbmVethMcastClearFilterTable, | |
889 | 0); | |
706c8c93 | 890 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
891 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
892 | } | |
893 | /* add the addresses to the filter table */ | |
894 | for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) { | |
895 | // add the multicast address to the filter table | |
896 | unsigned long mcast_addr = 0; | |
897 | memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6); | |
898 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
899 | IbmVethMcastAddFilter, | |
900 | mcast_addr); | |
706c8c93 | 901 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
902 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
903 | } | |
904 | } | |
d7fbeba6 | 905 | |
1da177e4 LT |
906 | /* re-enable filtering */ |
907 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
908 | IbmVethMcastEnableFiltering, | |
909 | 0); | |
706c8c93 | 910 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
911 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
912 | } | |
913 | } | |
914 | } | |
915 | ||
916 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
917 | { | |
b6d35182 | 918 | struct ibmveth_adapter *adapter = dev->priv; |
860f242e | 919 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
b6d35182 | 920 | int i; |
b6d35182 | 921 | |
860f242e | 922 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 923 | return -EINVAL; |
b6d35182 | 924 | |
860f242e | 925 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 926 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
860f242e SL |
927 | if (!adapter->rx_buff_pool[i].active) |
928 | continue; | |
929 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { | |
930 | dev->mtu = new_mtu; | |
931 | return 0; | |
b6d35182 | 932 | } |
b6d35182 | 933 | } |
860f242e | 934 | return -EINVAL; |
1da177e4 LT |
935 | } |
936 | ||
6b422374 SL |
937 | #ifdef CONFIG_NET_POLL_CONTROLLER |
938 | static void ibmveth_poll_controller(struct net_device *dev) | |
939 | { | |
940 | ibmveth_replenish_task(dev->priv); | |
5f77113c | 941 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
942 | } |
943 | #endif | |
944 | ||
1da177e4 LT |
945 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
946 | { | |
b6d35182 | 947 | int rc, i; |
1da177e4 | 948 | struct net_device *netdev; |
b6d35182 | 949 | struct ibmveth_adapter *adapter = NULL; |
1da177e4 LT |
950 | |
951 | unsigned char *mac_addr_p; | |
952 | unsigned int *mcastFilterSize_p; | |
953 | ||
954 | ||
d7fbeba6 | 955 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
956 | dev->unit_address); |
957 | ||
958 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0); | |
959 | if(!mac_addr_p) { | |
960 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
961 | "attribute\n", __FILE__, __LINE__); | |
962 | return 0; | |
963 | } | |
d7fbeba6 | 964 | |
1da177e4 LT |
965 | mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0); |
966 | if(!mcastFilterSize_p) { | |
967 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
968 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
969 | __FILE__, __LINE__); | |
970 | return 0; | |
971 | } | |
d7fbeba6 | 972 | |
1da177e4 LT |
973 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
974 | ||
975 | if(!netdev) | |
976 | return -ENOMEM; | |
977 | ||
978 | SET_MODULE_OWNER(netdev); | |
979 | ||
980 | adapter = netdev->priv; | |
981 | memset(adapter, 0, sizeof(adapter)); | |
982 | dev->dev.driver_data = netdev; | |
983 | ||
984 | adapter->vdev = dev; | |
985 | adapter->netdev = netdev; | |
986 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 987 | adapter->pool_config = 0; |
d7fbeba6 | 988 | |
1da177e4 | 989 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 990 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 991 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 992 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 993 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 994 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
995 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
996 | ||
997 | if ((*mac_addr_p & 0x3) != 0x02) | |
998 | mac_addr_p += 2; | |
999 | ||
1000 | adapter->mac_addr = 0; | |
1001 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1002 | ||
1003 | adapter->liobn = dev->iommu_table->it_index; | |
d7fbeba6 | 1004 | |
1da177e4 LT |
1005 | netdev->irq = dev->irq; |
1006 | netdev->open = ibmveth_open; | |
1007 | netdev->poll = ibmveth_poll; | |
1008 | netdev->weight = 16; | |
1009 | netdev->stop = ibmveth_close; | |
1010 | netdev->hard_start_xmit = ibmveth_start_xmit; | |
1011 | netdev->get_stats = ibmveth_get_stats; | |
1012 | netdev->set_multicast_list = ibmveth_set_multicast_list; | |
1013 | netdev->do_ioctl = ibmveth_ioctl; | |
1014 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1015 | netdev->change_mtu = ibmveth_change_mtu; | |
1016 | SET_NETDEV_DEV(netdev, &dev->dev); | |
6b422374 SL |
1017 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1018 | netdev->poll_controller = ibmveth_poll_controller; | |
1019 | #endif | |
d7fbeba6 | 1020 | netdev->features |= NETIF_F_LLTX; |
60296d9e | 1021 | spin_lock_init(&adapter->stats_lock); |
1da177e4 LT |
1022 | |
1023 | memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); | |
1024 | ||
860f242e SL |
1025 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1026 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
d7fbeba6 JG |
1027 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1028 | pool_count[i], pool_size[i], | |
860f242e SL |
1029 | pool_active[i]); |
1030 | kobj->parent = &dev->dev.kobj; | |
1031 | sprintf(kobj->name, "pool%d", i); | |
1032 | kobj->ktype = &ktype_veth_pool; | |
1033 | kobject_register(kobj); | |
1034 | } | |
1da177e4 LT |
1035 | |
1036 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1037 | ||
1da177e4 LT |
1038 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1039 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1040 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1041 | ||
1da177e4 LT |
1042 | ibmveth_debug_printk("registering netdev...\n"); |
1043 | ||
1044 | rc = register_netdev(netdev); | |
1045 | ||
1046 | if(rc) { | |
1047 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1048 | free_netdev(netdev); | |
1049 | return rc; | |
1050 | } | |
1051 | ||
1052 | ibmveth_debug_printk("registered\n"); | |
1053 | ||
1054 | ibmveth_proc_register_adapter(adapter); | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1060 | { | |
1061 | struct net_device *netdev = dev->dev.driver_data; | |
1062 | struct ibmveth_adapter *adapter = netdev->priv; | |
860f242e SL |
1063 | int i; |
1064 | ||
1065 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
1066 | kobject_unregister(&adapter->rx_buff_pool[i].kobj); | |
1da177e4 LT |
1067 | |
1068 | unregister_netdev(netdev); | |
1069 | ||
1070 | ibmveth_proc_unregister_adapter(adapter); | |
1071 | ||
1072 | free_netdev(netdev); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | #ifdef CONFIG_PROC_FS | |
1077 | static void ibmveth_proc_register_driver(void) | |
1078 | { | |
66600221 | 1079 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL); |
1da177e4 LT |
1080 | if (ibmveth_proc_dir) { |
1081 | SET_MODULE_OWNER(ibmveth_proc_dir); | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | static void ibmveth_proc_unregister_driver(void) | |
1086 | { | |
66600221 | 1087 | remove_proc_entry(IBMVETH_PROC_DIR, NULL); |
1da177e4 LT |
1088 | } |
1089 | ||
d7fbeba6 | 1090 | static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4 LT |
1091 | { |
1092 | if (*pos == 0) { | |
1093 | return (void *)1; | |
1094 | } else { | |
1095 | return NULL; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1100 | { | |
1101 | ++*pos; | |
1102 | return NULL; | |
1103 | } | |
1104 | ||
d7fbeba6 | 1105 | static void ibmveth_seq_stop(struct seq_file *seq, void *v) |
1da177e4 LT |
1106 | { |
1107 | } | |
1108 | ||
d7fbeba6 | 1109 | static int ibmveth_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1110 | { |
1111 | struct ibmveth_adapter *adapter = seq->private; | |
1112 | char *current_mac = ((char*) &adapter->netdev->dev_addr); | |
1113 | char *firmware_mac = ((char*) &adapter->mac_addr) ; | |
1114 | ||
1115 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1116 | |
1da177e4 LT |
1117 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
1118 | seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn); | |
1119 | seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1120 | current_mac[0], current_mac[1], current_mac[2], | |
1121 | current_mac[3], current_mac[4], current_mac[5]); | |
1122 | seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1123 | firmware_mac[0], firmware_mac[1], firmware_mac[2], | |
1124 | firmware_mac[3], firmware_mac[4], firmware_mac[5]); | |
d7fbeba6 | 1125 | |
1da177e4 LT |
1126 | seq_printf(seq, "\nAdapter Statistics:\n"); |
1127 | seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized); | |
1128 | seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send); | |
1129 | seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed); | |
1130 | seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed); | |
1131 | seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed); | |
1132 | seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles); | |
1133 | seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem); | |
1134 | seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure); | |
1135 | seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer); | |
1136 | seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1137 | |
1da177e4 LT |
1138 | return 0; |
1139 | } | |
1140 | static struct seq_operations ibmveth_seq_ops = { | |
1141 | .start = ibmveth_seq_start, | |
1142 | .next = ibmveth_seq_next, | |
1143 | .stop = ibmveth_seq_stop, | |
1144 | .show = ibmveth_seq_show, | |
1145 | }; | |
1146 | ||
1147 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1148 | { | |
1149 | struct seq_file *seq; | |
1150 | struct proc_dir_entry *proc; | |
1151 | int rc; | |
1152 | ||
1153 | rc = seq_open(file, &ibmveth_seq_ops); | |
1154 | if (!rc) { | |
1155 | /* recover the pointer buried in proc_dir_entry data */ | |
1156 | seq = file->private_data; | |
1157 | proc = PDE(inode); | |
1158 | seq->private = proc->data; | |
1159 | } | |
1160 | return rc; | |
1161 | } | |
1162 | ||
1163 | static struct file_operations ibmveth_proc_fops = { | |
1164 | .owner = THIS_MODULE, | |
1165 | .open = ibmveth_proc_open, | |
1166 | .read = seq_read, | |
1167 | .llseek = seq_lseek, | |
1168 | .release = seq_release, | |
1169 | }; | |
1170 | ||
1171 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1172 | { | |
1173 | struct proc_dir_entry *entry; | |
1174 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1175 | char u_addr[10]; |
1176 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1177 | entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir); | |
1da177e4 LT |
1178 | if (!entry) { |
1179 | ibmveth_error_printk("Cannot create adapter proc entry"); | |
1180 | } else { | |
1181 | entry->data = (void *) adapter; | |
1182 | entry->proc_fops = &ibmveth_proc_fops; | |
1183 | SET_MODULE_OWNER(entry); | |
1184 | } | |
1185 | } | |
1186 | return; | |
1187 | } | |
1188 | ||
1189 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1190 | { | |
1191 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1192 | char u_addr[10]; |
1193 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1194 | remove_proc_entry(u_addr, ibmveth_proc_dir); | |
1da177e4 LT |
1195 | } |
1196 | } | |
1197 | ||
1198 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1199 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1200 | { |
1201 | } | |
1202 | ||
d7fbeba6 | 1203 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1204 | { |
1205 | } | |
1206 | static void ibmveth_proc_register_driver(void) | |
1207 | { | |
1208 | } | |
1209 | ||
1210 | static void ibmveth_proc_unregister_driver(void) | |
1211 | { | |
1212 | } | |
1213 | #endif /* CONFIG_PROC_FS */ | |
1214 | ||
860f242e SL |
1215 | static struct attribute veth_active_attr; |
1216 | static struct attribute veth_num_attr; | |
1217 | static struct attribute veth_size_attr; | |
1218 | ||
1219 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1220 | struct attribute * attr, char * buf) | |
1221 | { | |
d7fbeba6 | 1222 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1223 | struct ibmveth_buff_pool, |
1224 | kobj); | |
1225 | ||
1226 | if (attr == &veth_active_attr) | |
1227 | return sprintf(buf, "%d\n", pool->active); | |
1228 | else if (attr == &veth_num_attr) | |
1229 | return sprintf(buf, "%d\n", pool->size); | |
1230 | else if (attr == &veth_size_attr) | |
1231 | return sprintf(buf, "%d\n", pool->buff_size); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1236 | const char * buf, size_t count) | |
1237 | { | |
d7fbeba6 | 1238 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1239 | struct ibmveth_buff_pool, |
1240 | kobj); | |
d7fbeba6 | 1241 | struct net_device *netdev = |
860f242e SL |
1242 | container_of(kobj->parent, struct device, kobj)->driver_data; |
1243 | struct ibmveth_adapter *adapter = netdev->priv; | |
1244 | long value = simple_strtol(buf, NULL, 10); | |
1245 | long rc; | |
1246 | ||
1247 | if (attr == &veth_active_attr) { | |
1248 | if (value && !pool->active) { | |
1249 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1250 | ibmveth_error_printk("unable to alloc pool\n"); | |
1251 | return -ENOMEM; | |
1252 | } | |
1253 | pool->active = 1; | |
1254 | adapter->pool_config = 1; | |
1255 | ibmveth_close(netdev); | |
1256 | adapter->pool_config = 0; | |
1257 | if ((rc = ibmveth_open(netdev))) | |
1258 | return rc; | |
1259 | } else if (!value && pool->active) { | |
1260 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1261 | int i; | |
1262 | /* Make sure there is a buffer pool with buffers that | |
1263 | can hold a packet of the size of the MTU */ | |
1264 | for(i = 0; i<IbmVethNumBufferPools; i++) { | |
1265 | if (pool == &adapter->rx_buff_pool[i]) | |
1266 | continue; | |
1267 | if (!adapter->rx_buff_pool[i].active) | |
1268 | continue; | |
1269 | if (mtu < adapter->rx_buff_pool[i].buff_size) { | |
1270 | pool->active = 0; | |
1271 | h_free_logical_lan_buffer(adapter-> | |
1272 | vdev-> | |
1273 | unit_address, | |
1274 | pool-> | |
1275 | buff_size); | |
1276 | } | |
1277 | } | |
1278 | if (pool->active) { | |
1279 | ibmveth_error_printk("no active pool >= MTU\n"); | |
1280 | return -EPERM; | |
1281 | } | |
1282 | } | |
1283 | } else if (attr == &veth_num_attr) { | |
1284 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1285 | return -EINVAL; | |
1286 | else { | |
1287 | adapter->pool_config = 1; | |
1288 | ibmveth_close(netdev); | |
1289 | adapter->pool_config = 0; | |
1290 | pool->size = value; | |
1291 | if ((rc = ibmveth_open(netdev))) | |
1292 | return rc; | |
1293 | } | |
1294 | } else if (attr == &veth_size_attr) { | |
1295 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1296 | return -EINVAL; | |
1297 | else { | |
1298 | adapter->pool_config = 1; | |
1299 | ibmveth_close(netdev); | |
1300 | adapter->pool_config = 0; | |
1301 | pool->buff_size = value; | |
1302 | if ((rc = ibmveth_open(netdev))) | |
1303 | return rc; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1308 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1309 | return count; |
1310 | } | |
1311 | ||
1312 | ||
1313 | #define ATTR(_name, _mode) \ | |
1314 | struct attribute veth_##_name##_attr = { \ | |
1315 | .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \ | |
1316 | }; | |
1317 | ||
1318 | static ATTR(active, 0644); | |
1319 | static ATTR(num, 0644); | |
1320 | static ATTR(size, 0644); | |
1321 | ||
1322 | static struct attribute * veth_pool_attrs[] = { | |
1323 | &veth_active_attr, | |
1324 | &veth_num_attr, | |
1325 | &veth_size_attr, | |
1326 | NULL, | |
1327 | }; | |
1328 | ||
1329 | static struct sysfs_ops veth_pool_ops = { | |
1330 | .show = veth_pool_show, | |
1331 | .store = veth_pool_store, | |
1332 | }; | |
1333 | ||
1334 | static struct kobj_type ktype_veth_pool = { | |
1335 | .release = NULL, | |
1336 | .sysfs_ops = &veth_pool_ops, | |
1337 | .default_attrs = veth_pool_attrs, | |
1338 | }; | |
1339 | ||
1340 | ||
1da177e4 LT |
1341 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1342 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1343 | { "", "" } |
1da177e4 | 1344 | }; |
1da177e4 LT |
1345 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1346 | ||
1347 | static struct vio_driver ibmveth_driver = { | |
6fdf5392 SR |
1348 | .id_table = ibmveth_device_table, |
1349 | .probe = ibmveth_probe, | |
1350 | .remove = ibmveth_remove, | |
1351 | .driver = { | |
1352 | .name = ibmveth_driver_name, | |
915124d8 | 1353 | .owner = THIS_MODULE, |
6fdf5392 | 1354 | } |
1da177e4 LT |
1355 | }; |
1356 | ||
1357 | static int __init ibmveth_module_init(void) | |
1358 | { | |
1359 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1360 | ||
1361 | ibmveth_proc_register_driver(); | |
1362 | ||
1363 | return vio_register_driver(&ibmveth_driver); | |
1364 | } | |
1365 | ||
1366 | static void __exit ibmveth_module_exit(void) | |
1367 | { | |
1368 | vio_unregister_driver(&ibmveth_driver); | |
1369 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1370 | } |
1da177e4 LT |
1371 | |
1372 | module_init(ibmveth_module_init); | |
1373 | module_exit(ibmveth_module_exit); |