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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> | |
f4ff2872 BK |
50 | #include <linux/in.h> |
51 | #include <linux/ip.h> | |
457c4cbc | 52 | #include <net/net_namespace.h> |
1da177e4 LT |
53 | #include <asm/semaphore.h> |
54 | #include <asm/hvcall.h> | |
55 | #include <asm/atomic.h> | |
1da177e4 LT |
56 | #include <asm/vio.h> |
57 | #include <asm/uaccess.h> | |
58 | #include <linux/seq_file.h> | |
59 | ||
60 | #include "ibmveth.h" | |
61 | ||
6af37fa9 | 62 | #undef DEBUG |
1da177e4 LT |
63 | |
64 | #define ibmveth_printk(fmt, args...) \ | |
f98baffb | 65 | printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) |
1da177e4 LT |
66 | |
67 | #define ibmveth_error_printk(fmt, args...) \ | |
68 | printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
69 | ||
70 | #ifdef DEBUG | |
71 | #define ibmveth_debug_printk_no_adapter(fmt, args...) \ | |
72 | printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) | |
73 | #define ibmveth_debug_printk(fmt, args...) \ | |
74 | printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
75 | #define ibmveth_assert(expr) \ | |
76 | if(!(expr)) { \ | |
77 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
78 | BUG(); \ | |
79 | } | |
80 | #else | |
81 | #define ibmveth_debug_printk_no_adapter(fmt, args...) | |
82 | #define ibmveth_debug_printk(fmt, args...) | |
d7fbeba6 | 83 | #define ibmveth_assert(expr) |
1da177e4 LT |
84 | #endif |
85 | ||
86 | static int ibmveth_open(struct net_device *dev); | |
87 | static int ibmveth_close(struct net_device *dev); | |
88 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
bea3348e | 89 | static int ibmveth_poll(struct napi_struct *napi, int budget); |
1da177e4 LT |
90 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
91 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev); | |
92 | static void ibmveth_set_multicast_list(struct net_device *dev); | |
93 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
94 | static void ibmveth_proc_register_driver(void); | |
95 | static void ibmveth_proc_unregister_driver(void); | |
96 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
97 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
7d12e780 | 98 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 99 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
860f242e | 100 | static struct kobj_type ktype_veth_pool; |
1da177e4 LT |
101 | |
102 | #ifdef CONFIG_PROC_FS | |
457c4cbc | 103 | #define IBMVETH_PROC_DIR "ibmveth" |
1da177e4 LT |
104 | static struct proc_dir_entry *ibmveth_proc_dir; |
105 | #endif | |
106 | ||
107 | static const char ibmveth_driver_name[] = "ibmveth"; | |
108 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
109 | #define ibmveth_driver_version "1.03" | |
110 | ||
111 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
112 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
113 | MODULE_LICENSE("GPL"); | |
114 | MODULE_VERSION(ibmveth_driver_version); | |
115 | ||
ddbb4de9 BK |
116 | struct ibmveth_stat { |
117 | char name[ETH_GSTRING_LEN]; | |
118 | int offset; | |
119 | }; | |
120 | ||
121 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
122 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
123 | ||
124 | struct ibmveth_stat ibmveth_stats[] = { | |
125 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
126 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
127 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
128 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
129 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
130 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
131 | { "tx_multidesc_send", IBMVETH_STAT_OFF(tx_multidesc_send) }, | |
132 | { "tx_linearized", IBMVETH_STAT_OFF(tx_linearized) }, | |
133 | { "tx_linearize_failed", IBMVETH_STAT_OFF(tx_linearize_failed) }, | |
134 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, | |
135 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
136 | }; | |
137 | ||
1da177e4 LT |
138 | /* simple methods of getting data from the current rxq entry */ |
139 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) | |
140 | { | |
141 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle); | |
142 | } | |
143 | ||
144 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
145 | { | |
146 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid); | |
147 | } | |
148 | ||
149 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
150 | { | |
151 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset); | |
152 | } | |
153 | ||
154 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
155 | { | |
156 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
157 | } | |
158 | ||
f4ff2872 BK |
159 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
160 | { | |
161 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].csum_good); | |
162 | } | |
163 | ||
1da177e4 | 164 | /* setup the initial settings for a buffer pool */ |
860f242e | 165 | 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 |
166 | { |
167 | pool->size = pool_size; | |
168 | pool->index = pool_index; | |
169 | pool->buff_size = buff_size; | |
170 | pool->threshold = pool_size / 2; | |
860f242e | 171 | pool->active = pool_active; |
1da177e4 LT |
172 | } |
173 | ||
174 | /* allocate and setup an buffer pool - called during open */ | |
175 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
176 | { | |
177 | int i; | |
178 | ||
d7fbeba6 | 179 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
180 | |
181 | if(!pool->free_map) { | |
182 | return -1; | |
183 | } | |
184 | ||
d7fbeba6 | 185 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
186 | if(!pool->dma_addr) { |
187 | kfree(pool->free_map); | |
188 | pool->free_map = NULL; | |
189 | return -1; | |
190 | } | |
191 | ||
192 | pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL); | |
193 | ||
194 | if(!pool->skbuff) { | |
195 | kfree(pool->dma_addr); | |
196 | pool->dma_addr = NULL; | |
197 | ||
198 | kfree(pool->free_map); | |
199 | pool->free_map = NULL; | |
200 | return -1; | |
201 | } | |
202 | ||
203 | memset(pool->skbuff, 0, sizeof(void*) * pool->size); | |
204 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); | |
205 | ||
206 | for(i = 0; i < pool->size; ++i) { | |
207 | pool->free_map[i] = i; | |
208 | } | |
209 | ||
210 | atomic_set(&pool->available, 0); | |
211 | pool->producer_index = 0; | |
212 | pool->consumer_index = 0; | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | /* replenish the buffers for a pool. note that we don't need to | |
218 | * skb_reserve these since they are used for incoming... | |
219 | */ | |
220 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
221 | { | |
222 | u32 i; | |
223 | u32 count = pool->size - atomic_read(&pool->available); | |
224 | u32 buffers_added = 0; | |
225 | ||
226 | mb(); | |
227 | ||
228 | for(i = 0; i < count; ++i) { | |
229 | struct sk_buff *skb; | |
230 | unsigned int free_index, index; | |
231 | u64 correlator; | |
232 | union ibmveth_buf_desc desc; | |
233 | unsigned long lpar_rc; | |
234 | dma_addr_t dma_addr; | |
235 | ||
236 | skb = alloc_skb(pool->buff_size, GFP_ATOMIC); | |
237 | ||
238 | if(!skb) { | |
239 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
240 | adapter->replenish_no_mem++; | |
241 | break; | |
242 | } | |
243 | ||
047a66d4 DG |
244 | free_index = pool->consumer_index; |
245 | pool->consumer_index = (pool->consumer_index + 1) % pool->size; | |
1da177e4 | 246 | index = pool->free_map[free_index]; |
d7fbeba6 | 247 | |
1da177e4 LT |
248 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
249 | ibmveth_assert(pool->skbuff[index] == NULL); | |
250 | ||
251 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
252 | pool->buff_size, DMA_FROM_DEVICE); | |
253 | ||
254 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; | |
255 | pool->dma_addr[index] = dma_addr; | |
256 | pool->skbuff[index] = skb; | |
257 | ||
258 | correlator = ((u64)pool->index << 32) | index; | |
259 | *(u64*)skb->data = correlator; | |
260 | ||
261 | desc.desc = 0; | |
262 | desc.fields.valid = 1; | |
263 | desc.fields.length = pool->buff_size; | |
d7fbeba6 | 264 | desc.fields.address = dma_addr; |
1da177e4 LT |
265 | |
266 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 267 | |
706c8c93 | 268 | if(lpar_rc != H_SUCCESS) { |
82702d37 | 269 | pool->free_map[free_index] = index; |
1da177e4 | 270 | pool->skbuff[index] = NULL; |
751ae21c SL |
271 | if (pool->consumer_index == 0) |
272 | pool->consumer_index = pool->size - 1; | |
273 | else | |
274 | pool->consumer_index--; | |
1da177e4 LT |
275 | dma_unmap_single(&adapter->vdev->dev, |
276 | pool->dma_addr[index], pool->buff_size, | |
277 | DMA_FROM_DEVICE); | |
278 | dev_kfree_skb_any(skb); | |
279 | adapter->replenish_add_buff_failure++; | |
280 | break; | |
281 | } else { | |
282 | buffers_added++; | |
283 | adapter->replenish_add_buff_success++; | |
284 | } | |
285 | } | |
d7fbeba6 | 286 | |
1da177e4 LT |
287 | mb(); |
288 | atomic_add(buffers_added, &(pool->available)); | |
289 | } | |
290 | ||
e2adbcb4 | 291 | /* replenish routine */ |
d7fbeba6 | 292 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 293 | { |
b6d35182 SL |
294 | int i; |
295 | ||
1da177e4 LT |
296 | adapter->replenish_task_cycles++; |
297 | ||
b6d35182 SL |
298 | for(i = 0; i < IbmVethNumBufferPools; i++) |
299 | if(adapter->rx_buff_pool[i].active) | |
d7fbeba6 | 300 | ibmveth_replenish_buffer_pool(adapter, |
b6d35182 | 301 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
302 | |
303 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
304 | } |
305 | ||
306 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
307 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
308 | { | |
309 | int i; | |
310 | ||
b4558ea9 JJ |
311 | kfree(pool->free_map); |
312 | pool->free_map = NULL; | |
1da177e4 LT |
313 | |
314 | if(pool->skbuff && pool->dma_addr) { | |
315 | for(i = 0; i < pool->size; ++i) { | |
316 | struct sk_buff *skb = pool->skbuff[i]; | |
317 | if(skb) { | |
318 | dma_unmap_single(&adapter->vdev->dev, | |
319 | pool->dma_addr[i], | |
320 | pool->buff_size, | |
321 | DMA_FROM_DEVICE); | |
322 | dev_kfree_skb_any(skb); | |
323 | pool->skbuff[i] = NULL; | |
324 | } | |
325 | } | |
326 | } | |
327 | ||
328 | if(pool->dma_addr) { | |
329 | kfree(pool->dma_addr); | |
330 | pool->dma_addr = NULL; | |
331 | } | |
332 | ||
333 | if(pool->skbuff) { | |
334 | kfree(pool->skbuff); | |
335 | pool->skbuff = NULL; | |
336 | } | |
337 | } | |
338 | ||
339 | /* remove a buffer from a pool */ | |
340 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
341 | { | |
342 | unsigned int pool = correlator >> 32; | |
343 | unsigned int index = correlator & 0xffffffffUL; | |
344 | unsigned int free_index; | |
345 | struct sk_buff *skb; | |
346 | ||
347 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
348 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
349 | ||
350 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
351 | ||
352 | ibmveth_assert(skb != NULL); | |
353 | ||
354 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
355 | ||
356 | dma_unmap_single(&adapter->vdev->dev, | |
357 | adapter->rx_buff_pool[pool].dma_addr[index], | |
358 | adapter->rx_buff_pool[pool].buff_size, | |
359 | DMA_FROM_DEVICE); | |
360 | ||
047a66d4 DG |
361 | free_index = adapter->rx_buff_pool[pool].producer_index; |
362 | adapter->rx_buff_pool[pool].producer_index | |
363 | = (adapter->rx_buff_pool[pool].producer_index + 1) | |
364 | % adapter->rx_buff_pool[pool].size; | |
1da177e4 LT |
365 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
366 | ||
367 | mb(); | |
368 | ||
369 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
370 | } | |
371 | ||
372 | /* get the current buffer on the rx queue */ | |
373 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
374 | { | |
375 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
376 | unsigned int pool = correlator >> 32; | |
377 | unsigned int index = correlator & 0xffffffffUL; | |
378 | ||
379 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
380 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
381 | ||
382 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
383 | } | |
384 | ||
385 | /* recycle the current buffer on the rx queue */ | |
386 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
387 | { | |
388 | u32 q_index = adapter->rx_queue.index; | |
389 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
390 | unsigned int pool = correlator >> 32; | |
391 | unsigned int index = correlator & 0xffffffffUL; | |
392 | union ibmveth_buf_desc desc; | |
393 | unsigned long lpar_rc; | |
394 | ||
395 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
396 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
397 | ||
b6d35182 SL |
398 | if(!adapter->rx_buff_pool[pool].active) { |
399 | ibmveth_rxq_harvest_buffer(adapter); | |
400 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
401 | return; | |
402 | } | |
403 | ||
1da177e4 LT |
404 | desc.desc = 0; |
405 | desc.fields.valid = 1; | |
406 | desc.fields.length = adapter->rx_buff_pool[pool].buff_size; | |
407 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; | |
408 | ||
409 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 410 | |
706c8c93 | 411 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
412 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
413 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
414 | } | |
415 | ||
416 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
417 | adapter->rx_queue.index = 0; | |
418 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
419 | } | |
420 | } | |
421 | ||
493a684a | 422 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
423 | { |
424 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
425 | ||
426 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
427 | adapter->rx_queue.index = 0; | |
428 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
429 | } | |
430 | } | |
431 | ||
432 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
433 | { | |
b6d35182 SL |
434 | int i; |
435 | ||
1da177e4 LT |
436 | if(adapter->buffer_list_addr != NULL) { |
437 | if(!dma_mapping_error(adapter->buffer_list_dma)) { | |
438 | dma_unmap_single(&adapter->vdev->dev, | |
439 | adapter->buffer_list_dma, 4096, | |
440 | DMA_BIDIRECTIONAL); | |
441 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
442 | } | |
443 | free_page((unsigned long)adapter->buffer_list_addr); | |
444 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 445 | } |
1da177e4 LT |
446 | |
447 | if(adapter->filter_list_addr != NULL) { | |
448 | if(!dma_mapping_error(adapter->filter_list_dma)) { | |
449 | dma_unmap_single(&adapter->vdev->dev, | |
450 | adapter->filter_list_dma, 4096, | |
451 | DMA_BIDIRECTIONAL); | |
452 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
453 | } | |
454 | free_page((unsigned long)adapter->filter_list_addr); | |
455 | adapter->filter_list_addr = NULL; | |
456 | } | |
457 | ||
458 | if(adapter->rx_queue.queue_addr != NULL) { | |
459 | if(!dma_mapping_error(adapter->rx_queue.queue_dma)) { | |
460 | dma_unmap_single(&adapter->vdev->dev, | |
461 | adapter->rx_queue.queue_dma, | |
462 | adapter->rx_queue.queue_len, | |
463 | DMA_BIDIRECTIONAL); | |
464 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
465 | } | |
466 | kfree(adapter->rx_queue.queue_addr); | |
467 | adapter->rx_queue.queue_addr = NULL; | |
468 | } | |
469 | ||
b6d35182 | 470 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 471 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 472 | ibmveth_free_buffer_pool(adapter, |
860f242e | 473 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
474 | } |
475 | ||
bbedefcc ME |
476 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
477 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
478 | { | |
479 | int rc, try_again = 1; | |
480 | ||
481 | /* After a kexec the adapter will still be open, so our attempt to | |
482 | * open it will fail. So if we get a failure we free the adapter and | |
483 | * try again, but only once. */ | |
484 | retry: | |
485 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
486 | adapter->buffer_list_dma, rxq_desc.desc, | |
487 | adapter->filter_list_dma, mac_address); | |
488 | ||
489 | if (rc != H_SUCCESS && try_again) { | |
490 | do { | |
491 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
492 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
493 | ||
494 | try_again = 0; | |
495 | goto retry; | |
496 | } | |
497 | ||
498 | return rc; | |
499 | } | |
500 | ||
1da177e4 LT |
501 | static int ibmveth_open(struct net_device *netdev) |
502 | { | |
503 | struct ibmveth_adapter *adapter = netdev->priv; | |
504 | u64 mac_address = 0; | |
b6d35182 | 505 | int rxq_entries = 1; |
1da177e4 LT |
506 | unsigned long lpar_rc; |
507 | int rc; | |
508 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 509 | int i; |
1da177e4 LT |
510 | |
511 | ibmveth_debug_printk("open starting\n"); | |
512 | ||
bea3348e SH |
513 | napi_enable(&adapter->napi); |
514 | ||
b6d35182 SL |
515 | for(i = 0; i<IbmVethNumBufferPools; i++) |
516 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 517 | |
1da177e4 LT |
518 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
519 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 520 | |
1da177e4 LT |
521 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
522 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
523 | ibmveth_cleanup(adapter); | |
bea3348e | 524 | napi_disable(&adapter->napi); |
1da177e4 LT |
525 | return -ENOMEM; |
526 | } | |
527 | ||
528 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
529 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
530 | ||
531 | if(!adapter->rx_queue.queue_addr) { | |
532 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
533 | ibmveth_cleanup(adapter); | |
bea3348e | 534 | napi_disable(&adapter->napi); |
1da177e4 LT |
535 | return -ENOMEM; |
536 | } | |
537 | ||
538 | adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev, | |
539 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); | |
540 | adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev, | |
541 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); | |
542 | adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev, | |
543 | adapter->rx_queue.queue_addr, | |
544 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
545 | ||
546 | if((dma_mapping_error(adapter->buffer_list_dma) ) || | |
547 | (dma_mapping_error(adapter->filter_list_dma)) || | |
548 | (dma_mapping_error(adapter->rx_queue.queue_dma))) { | |
549 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); | |
550 | ibmveth_cleanup(adapter); | |
bea3348e | 551 | napi_disable(&adapter->napi); |
1da177e4 LT |
552 | return -ENOMEM; |
553 | } | |
554 | ||
555 | adapter->rx_queue.index = 0; | |
556 | adapter->rx_queue.num_slots = rxq_entries; | |
557 | adapter->rx_queue.toggle = 1; | |
558 | ||
1da177e4 LT |
559 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
560 | mac_address = mac_address >> 16; | |
561 | ||
562 | rxq_desc.desc = 0; | |
563 | rxq_desc.fields.valid = 1; | |
564 | rxq_desc.fields.length = adapter->rx_queue.queue_len; | |
565 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; | |
566 | ||
567 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
568 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
569 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
570 | ||
4347ef15 SL |
571 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
572 | ||
bbedefcc | 573 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 574 | |
706c8c93 | 575 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 576 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
8168f902 | 577 | ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n", |
1da177e4 LT |
578 | adapter->buffer_list_dma, |
579 | adapter->filter_list_dma, | |
580 | rxq_desc.desc, | |
581 | mac_address); | |
582 | ibmveth_cleanup(adapter); | |
bea3348e | 583 | napi_disable(&adapter->napi); |
d7fbeba6 | 584 | return -ENONET; |
1da177e4 LT |
585 | } |
586 | ||
860f242e SL |
587 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
588 | if(!adapter->rx_buff_pool[i].active) | |
589 | continue; | |
590 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
591 | ibmveth_error_printk("unable to alloc pool\n"); | |
592 | adapter->rx_buff_pool[i].active = 0; | |
593 | ibmveth_cleanup(adapter); | |
bea3348e | 594 | napi_disable(&adapter->napi); |
860f242e SL |
595 | return -ENOMEM ; |
596 | } | |
597 | } | |
598 | ||
1da177e4 LT |
599 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
600 | if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { | |
601 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); | |
602 | do { | |
603 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 604 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
605 | |
606 | ibmveth_cleanup(adapter); | |
bea3348e | 607 | napi_disable(&adapter->napi); |
1da177e4 LT |
608 | return rc; |
609 | } | |
610 | ||
e2adbcb4 | 611 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 612 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 613 | |
e2adbcb4 | 614 | netif_start_queue(netdev); |
1da177e4 LT |
615 | |
616 | ibmveth_debug_printk("open complete\n"); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | static int ibmveth_close(struct net_device *netdev) | |
622 | { | |
623 | struct ibmveth_adapter *adapter = netdev->priv; | |
624 | long lpar_rc; | |
d7fbeba6 | 625 | |
1da177e4 LT |
626 | ibmveth_debug_printk("close starting\n"); |
627 | ||
bea3348e SH |
628 | napi_disable(&adapter->napi); |
629 | ||
860f242e SL |
630 | if (!adapter->pool_config) |
631 | netif_stop_queue(netdev); | |
1da177e4 LT |
632 | |
633 | free_irq(netdev->irq, netdev); | |
634 | ||
1da177e4 LT |
635 | do { |
636 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 637 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 638 | |
706c8c93 | 639 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
640 | { |
641 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
642 | lpar_rc); | |
643 | } | |
644 | ||
645 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
646 | ||
647 | ibmveth_cleanup(adapter); | |
648 | ||
649 | ibmveth_debug_printk("close complete\n"); | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
655 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
656 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
657 | cmd->speed = SPEED_1000; | |
658 | cmd->duplex = DUPLEX_FULL; | |
659 | cmd->port = PORT_FIBRE; | |
660 | cmd->phy_address = 0; | |
661 | cmd->transceiver = XCVR_INTERNAL; | |
662 | cmd->autoneg = AUTONEG_ENABLE; | |
663 | cmd->maxtxpkt = 0; | |
664 | cmd->maxrxpkt = 1; | |
665 | return 0; | |
666 | } | |
667 | ||
668 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
669 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
670 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
671 | } | |
672 | ||
673 | static u32 netdev_get_link(struct net_device *dev) { | |
674 | return 1; | |
675 | } | |
676 | ||
5fc7e01c BK |
677 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
678 | { | |
679 | struct ibmveth_adapter *adapter = dev->priv; | |
680 | ||
681 | if (data) | |
682 | adapter->rx_csum = 1; | |
683 | else { | |
684 | /* | |
685 | * Since the ibmveth firmware interface does not have the concept of | |
686 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
687 | * we also have to disable tx checksum offload. Once we disable rx | |
688 | * checksum offload, we are no longer allowed to send tx buffers that | |
689 | * are not properly checksummed. | |
690 | */ | |
691 | adapter->rx_csum = 0; | |
692 | dev->features &= ~NETIF_F_IP_CSUM; | |
693 | } | |
694 | } | |
695 | ||
696 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
697 | { | |
698 | struct ibmveth_adapter *adapter = dev->priv; | |
699 | ||
700 | if (data) { | |
701 | dev->features |= NETIF_F_IP_CSUM; | |
702 | adapter->rx_csum = 1; | |
703 | } else | |
704 | dev->features &= ~NETIF_F_IP_CSUM; | |
705 | } | |
706 | ||
707 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
708 | void (*done) (struct net_device *, u32)) | |
709 | { | |
710 | struct ibmveth_adapter *adapter = dev->priv; | |
711 | union ibmveth_illan_attributes set_attr, clr_attr, ret_attr; | |
712 | long ret; | |
713 | int rc1 = 0, rc2 = 0; | |
714 | int restart = 0; | |
715 | ||
716 | if (netif_running(dev)) { | |
717 | restart = 1; | |
718 | adapter->pool_config = 1; | |
719 | ibmveth_close(dev); | |
720 | adapter->pool_config = 0; | |
721 | } | |
722 | ||
723 | set_attr.desc = 0; | |
724 | clr_attr.desc = 0; | |
725 | ||
726 | if (data) | |
727 | set_attr.fields.tcp_csum_offload_ipv4 = 1; | |
728 | else | |
729 | clr_attr.fields.tcp_csum_offload_ipv4 = 1; | |
730 | ||
731 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr.desc); | |
732 | ||
733 | if (ret == H_SUCCESS && !ret_attr.fields.active_trunk && | |
734 | !ret_attr.fields.trunk_priority && | |
735 | ret_attr.fields.csum_offload_padded_pkt_support) { | |
736 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr.desc, | |
737 | set_attr.desc, &ret_attr.desc); | |
738 | ||
739 | if (ret != H_SUCCESS) { | |
740 | rc1 = -EIO; | |
741 | ibmveth_error_printk("unable to change checksum offload settings." | |
742 | " %d rc=%ld\n", data, ret); | |
743 | ||
744 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
745 | set_attr.desc, clr_attr.desc, &ret_attr.desc); | |
746 | } else | |
747 | done(dev, data); | |
748 | } else { | |
749 | rc1 = -EIO; | |
750 | ibmveth_error_printk("unable to change checksum offload settings." | |
751 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr.desc); | |
752 | } | |
753 | ||
754 | if (restart) | |
755 | rc2 = ibmveth_open(dev); | |
756 | ||
757 | return rc1 ? rc1 : rc2; | |
758 | } | |
759 | ||
760 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
761 | { | |
762 | struct ibmveth_adapter *adapter = dev->priv; | |
763 | ||
764 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
765 | return 0; | |
766 | ||
767 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
768 | } | |
769 | ||
770 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
771 | { | |
772 | struct ibmveth_adapter *adapter = dev->priv; | |
773 | int rc = 0; | |
774 | ||
775 | if (data && (dev->features & NETIF_F_IP_CSUM)) | |
776 | return 0; | |
777 | if (!data && !(dev->features & NETIF_F_IP_CSUM)) | |
778 | return 0; | |
779 | ||
780 | if (data && !adapter->rx_csum) | |
781 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
782 | else | |
783 | ibmveth_set_tx_csum_flags(dev, data); | |
784 | ||
785 | return rc; | |
786 | } | |
787 | ||
788 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
789 | { | |
790 | struct ibmveth_adapter *adapter = dev->priv; | |
791 | return adapter->rx_csum; | |
792 | } | |
793 | ||
ddbb4de9 BK |
794 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
795 | { | |
796 | int i; | |
797 | ||
798 | if (stringset != ETH_SS_STATS) | |
799 | return; | |
800 | ||
801 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
802 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
803 | } | |
804 | ||
805 | static int ibmveth_get_stats_count(struct net_device *dev) | |
806 | { | |
807 | return ARRAY_SIZE(ibmveth_stats); | |
808 | } | |
809 | ||
810 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
811 | struct ethtool_stats *stats, u64 *data) | |
812 | { | |
813 | int i; | |
814 | struct ibmveth_adapter *adapter = dev->priv; | |
815 | ||
816 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
817 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
818 | } | |
819 | ||
7282d491 | 820 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
821 | .get_drvinfo = netdev_get_drvinfo, |
822 | .get_settings = netdev_get_settings, | |
823 | .get_link = netdev_get_link, | |
824 | .get_sg = ethtool_op_get_sg, | |
825 | .get_tx_csum = ethtool_op_get_tx_csum, | |
5fc7e01c BK |
826 | .set_tx_csum = ibmveth_set_tx_csum, |
827 | .get_rx_csum = ibmveth_get_rx_csum, | |
828 | .set_rx_csum = ibmveth_set_rx_csum, | |
80e53677 BK |
829 | .get_tso = ethtool_op_get_tso, |
830 | .get_ufo = ethtool_op_get_ufo, | |
ddbb4de9 BK |
831 | .get_strings = ibmveth_get_strings, |
832 | .get_stats_count = ibmveth_get_stats_count, | |
833 | .get_ethtool_stats = ibmveth_get_ethtool_stats, | |
1da177e4 LT |
834 | }; |
835 | ||
836 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
837 | { | |
838 | return -EOPNOTSUPP; | |
839 | } | |
840 | ||
841 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
842 | ||
843 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
844 | { | |
845 | struct ibmveth_adapter *adapter = netdev->priv; | |
846 | union ibmveth_buf_desc desc[IbmVethMaxSendFrags]; | |
847 | unsigned long lpar_rc; | |
848 | int nfrags = 0, curfrag; | |
849 | unsigned long correlator; | |
60296d9e | 850 | unsigned long flags; |
1da177e4 | 851 | unsigned int retry_count; |
60296d9e SL |
852 | unsigned int tx_dropped = 0; |
853 | unsigned int tx_bytes = 0; | |
854 | unsigned int tx_packets = 0; | |
855 | unsigned int tx_send_failed = 0; | |
856 | unsigned int tx_map_failed = 0; | |
857 | ||
1da177e4 LT |
858 | |
859 | if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) { | |
60296d9e SL |
860 | tx_dropped++; |
861 | goto out; | |
1da177e4 LT |
862 | } |
863 | ||
864 | memset(&desc, 0, sizeof(desc)); | |
865 | ||
866 | /* nfrags = number of frags after the initial fragment */ | |
867 | nfrags = skb_shinfo(skb)->nr_frags; | |
868 | ||
869 | if(nfrags) | |
870 | adapter->tx_multidesc_send++; | |
871 | ||
872 | /* map the initial fragment */ | |
873 | desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len; | |
874 | desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
875 | desc[0].fields.length, DMA_TO_DEVICE); | |
876 | desc[0].fields.valid = 1; | |
877 | ||
f4ff2872 BK |
878 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
879 | ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { | |
880 | ibmveth_error_printk("tx: failed to checksum packet\n"); | |
881 | tx_dropped++; | |
882 | goto out; | |
883 | } | |
884 | ||
885 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
886 | unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; | |
887 | ||
888 | desc[0].fields.no_csum = 1; | |
889 | desc[0].fields.csum_good = 1; | |
890 | ||
891 | /* Need to zero out the checksum */ | |
892 | buf[0] = 0; | |
893 | buf[1] = 0; | |
894 | } | |
895 | ||
1da177e4 LT |
896 | if(dma_mapping_error(desc[0].fields.address)) { |
897 | ibmveth_error_printk("tx: unable to map initial fragment\n"); | |
60296d9e SL |
898 | tx_map_failed++; |
899 | tx_dropped++; | |
900 | goto out; | |
1da177e4 LT |
901 | } |
902 | ||
903 | curfrag = nfrags; | |
904 | ||
905 | /* map fragments past the initial portion if there are any */ | |
906 | while(curfrag--) { | |
907 | skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag]; | |
908 | desc[curfrag+1].fields.address | |
909 | = dma_map_single(&adapter->vdev->dev, | |
910 | page_address(frag->page) + frag->page_offset, | |
911 | frag->size, DMA_TO_DEVICE); | |
912 | desc[curfrag+1].fields.length = frag->size; | |
913 | desc[curfrag+1].fields.valid = 1; | |
f4ff2872 BK |
914 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
915 | desc[curfrag+1].fields.no_csum = 1; | |
916 | desc[curfrag+1].fields.csum_good = 1; | |
917 | } | |
1da177e4 LT |
918 | |
919 | if(dma_mapping_error(desc[curfrag+1].fields.address)) { | |
920 | ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag); | |
60296d9e SL |
921 | tx_map_failed++; |
922 | tx_dropped++; | |
1da177e4 LT |
923 | /* Free all the mappings we just created */ |
924 | while(curfrag < nfrags) { | |
925 | dma_unmap_single(&adapter->vdev->dev, | |
926 | desc[curfrag+1].fields.address, | |
927 | desc[curfrag+1].fields.length, | |
928 | DMA_TO_DEVICE); | |
929 | curfrag++; | |
930 | } | |
60296d9e | 931 | goto out; |
1da177e4 LT |
932 | } |
933 | } | |
934 | ||
935 | /* send the frame. Arbitrarily set retrycount to 1024 */ | |
936 | correlator = 0; | |
937 | retry_count = 1024; | |
938 | do { | |
939 | lpar_rc = h_send_logical_lan(adapter->vdev->unit_address, | |
940 | desc[0].desc, | |
941 | desc[1].desc, | |
942 | desc[2].desc, | |
943 | desc[3].desc, | |
944 | desc[4].desc, | |
945 | desc[5].desc, | |
b9377ffc AB |
946 | correlator, |
947 | &correlator); | |
706c8c93 | 948 | } while ((lpar_rc == H_BUSY) && (retry_count--)); |
d7fbeba6 | 949 | |
706c8c93 | 950 | if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) { |
1da177e4 LT |
951 | int i; |
952 | ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); | |
953 | for(i = 0; i < 6; i++) { | |
954 | ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i, | |
955 | desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address); | |
956 | } | |
60296d9e SL |
957 | tx_send_failed++; |
958 | tx_dropped++; | |
1da177e4 | 959 | } else { |
60296d9e SL |
960 | tx_packets++; |
961 | tx_bytes += skb->len; | |
0abe791e | 962 | netdev->trans_start = jiffies; |
1da177e4 LT |
963 | } |
964 | ||
965 | do { | |
966 | dma_unmap_single(&adapter->vdev->dev, | |
967 | desc[nfrags].fields.address, | |
968 | desc[nfrags].fields.length, DMA_TO_DEVICE); | |
969 | } while(--nfrags >= 0); | |
970 | ||
60296d9e SL |
971 | out: spin_lock_irqsave(&adapter->stats_lock, flags); |
972 | adapter->stats.tx_dropped += tx_dropped; | |
973 | adapter->stats.tx_bytes += tx_bytes; | |
974 | adapter->stats.tx_packets += tx_packets; | |
975 | adapter->tx_send_failed += tx_send_failed; | |
976 | adapter->tx_map_failed += tx_map_failed; | |
977 | spin_unlock_irqrestore(&adapter->stats_lock, flags); | |
978 | ||
1da177e4 LT |
979 | dev_kfree_skb(skb); |
980 | return 0; | |
981 | } | |
982 | ||
bea3348e | 983 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 984 | { |
bea3348e SH |
985 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
986 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 987 | int frames_processed = 0; |
1da177e4 LT |
988 | unsigned long lpar_rc; |
989 | ||
990 | restart_poll: | |
991 | do { | |
bea3348e | 992 | struct sk_buff *skb; |
1da177e4 | 993 | |
bea3348e SH |
994 | if (!ibmveth_rxq_pending_buffer(adapter)) |
995 | break; | |
1da177e4 | 996 | |
bea3348e SH |
997 | rmb(); |
998 | if (!ibmveth_rxq_buffer_valid(adapter)) { | |
999 | wmb(); /* suggested by larson1 */ | |
1000 | adapter->rx_invalid_buffer++; | |
1001 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
1002 | ibmveth_rxq_recycle_buffer(adapter); | |
1003 | } else { | |
1004 | int length = ibmveth_rxq_frame_length(adapter); | |
1005 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1006 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1007 | ||
bea3348e | 1008 | skb = ibmveth_rxq_get_buffer(adapter); |
f4ff2872 BK |
1009 | if (csum_good) |
1010 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1da177e4 | 1011 | |
bea3348e | 1012 | ibmveth_rxq_harvest_buffer(adapter); |
1da177e4 | 1013 | |
bea3348e SH |
1014 | skb_reserve(skb, offset); |
1015 | skb_put(skb, length); | |
1016 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1017 | |
bea3348e | 1018 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1019 | |
bea3348e SH |
1020 | adapter->stats.rx_packets++; |
1021 | adapter->stats.rx_bytes += length; | |
1022 | frames_processed++; | |
1023 | netdev->last_rx = jiffies; | |
1da177e4 | 1024 | } |
bea3348e | 1025 | } while (frames_processed < budget); |
1da177e4 | 1026 | |
e2adbcb4 | 1027 | ibmveth_replenish_task(adapter); |
1da177e4 | 1028 | |
bea3348e SH |
1029 | if (frames_processed < budget) { |
1030 | /* We think we are done - reenable interrupts, | |
1031 | * then check once more to make sure we are done. | |
1032 | */ | |
1033 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1034 | VIO_IRQ_ENABLE); | |
1da177e4 | 1035 | |
bea3348e | 1036 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 1037 | |
bea3348e | 1038 | netif_rx_complete(netdev, napi); |
1da177e4 | 1039 | |
bea3348e SH |
1040 | if (ibmveth_rxq_pending_buffer(adapter) && |
1041 | netif_rx_reschedule(netdev, napi)) { | |
1042 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1043 | VIO_IRQ_DISABLE); | |
1044 | goto restart_poll; | |
1045 | } | |
1da177e4 LT |
1046 | } |
1047 | ||
bea3348e | 1048 | return frames_processed; |
1da177e4 LT |
1049 | } |
1050 | ||
7d12e780 | 1051 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1052 | { |
1da177e4 LT |
1053 | struct net_device *netdev = dev_instance; |
1054 | struct ibmveth_adapter *adapter = netdev->priv; | |
1055 | unsigned long lpar_rc; | |
1056 | ||
bea3348e SH |
1057 | if (netif_rx_schedule_prep(netdev, &adapter->napi)) { |
1058 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1059 | VIO_IRQ_DISABLE); | |
706c8c93 | 1060 | ibmveth_assert(lpar_rc == H_SUCCESS); |
bea3348e | 1061 | __netif_rx_schedule(netdev, &adapter->napi); |
1da177e4 LT |
1062 | } |
1063 | return IRQ_HANDLED; | |
1064 | } | |
1065 | ||
1066 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev) | |
1067 | { | |
1068 | struct ibmveth_adapter *adapter = dev->priv; | |
1069 | return &adapter->stats; | |
1070 | } | |
1071 | ||
1072 | static void ibmveth_set_multicast_list(struct net_device *netdev) | |
1073 | { | |
1074 | struct ibmveth_adapter *adapter = netdev->priv; | |
1075 | unsigned long lpar_rc; | |
1076 | ||
1077 | if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) { | |
1078 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1079 | IbmVethMcastEnableRecv | | |
1080 | IbmVethMcastDisableFiltering, | |
1081 | 0); | |
706c8c93 | 1082 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1083 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1084 | } | |
1085 | } else { | |
1086 | struct dev_mc_list *mclist = netdev->mc_list; | |
1087 | int i; | |
1088 | /* clear the filter table & disable filtering */ | |
1089 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1090 | IbmVethMcastEnableRecv | | |
1091 | IbmVethMcastDisableFiltering | | |
1092 | IbmVethMcastClearFilterTable, | |
1093 | 0); | |
706c8c93 | 1094 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1095 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1096 | } | |
1097 | /* add the addresses to the filter table */ | |
1098 | for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) { | |
1099 | // add the multicast address to the filter table | |
1100 | unsigned long mcast_addr = 0; | |
1101 | memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6); | |
1102 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1103 | IbmVethMcastAddFilter, | |
1104 | mcast_addr); | |
706c8c93 | 1105 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1106 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1107 | } | |
1108 | } | |
d7fbeba6 | 1109 | |
1da177e4 LT |
1110 | /* re-enable filtering */ |
1111 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1112 | IbmVethMcastEnableFiltering, | |
1113 | 0); | |
706c8c93 | 1114 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1115 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1116 | } | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1121 | { | |
b6d35182 | 1122 | struct ibmveth_adapter *adapter = dev->priv; |
860f242e | 1123 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
ce6eea58 BK |
1124 | int reinit = 0; |
1125 | int i, rc; | |
b6d35182 | 1126 | |
860f242e | 1127 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1128 | return -EINVAL; |
b6d35182 | 1129 | |
ce6eea58 BK |
1130 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1131 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1132 | break; | |
1133 | ||
1134 | if (i == IbmVethNumBufferPools) | |
1135 | return -EINVAL; | |
1136 | ||
860f242e | 1137 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1138 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ce6eea58 BK |
1139 | if (!adapter->rx_buff_pool[i].active) { |
1140 | adapter->rx_buff_pool[i].active = 1; | |
1141 | reinit = 1; | |
1142 | } | |
1143 | ||
860f242e | 1144 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
ce6eea58 BK |
1145 | if (reinit && netif_running(adapter->netdev)) { |
1146 | adapter->pool_config = 1; | |
1147 | ibmveth_close(adapter->netdev); | |
1148 | adapter->pool_config = 0; | |
1149 | dev->mtu = new_mtu; | |
1150 | if ((rc = ibmveth_open(adapter->netdev))) | |
1151 | return rc; | |
1152 | } else | |
1153 | dev->mtu = new_mtu; | |
860f242e | 1154 | return 0; |
b6d35182 | 1155 | } |
b6d35182 | 1156 | } |
860f242e | 1157 | return -EINVAL; |
1da177e4 LT |
1158 | } |
1159 | ||
6b422374 SL |
1160 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1161 | static void ibmveth_poll_controller(struct net_device *dev) | |
1162 | { | |
1163 | ibmveth_replenish_task(dev->priv); | |
5f77113c | 1164 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1165 | } |
1166 | #endif | |
1167 | ||
1da177e4 LT |
1168 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1169 | { | |
b6d35182 | 1170 | int rc, i; |
f4ff2872 | 1171 | long ret; |
1da177e4 | 1172 | struct net_device *netdev; |
9dc83afd | 1173 | struct ibmveth_adapter *adapter; |
f4ff2872 | 1174 | union ibmveth_illan_attributes set_attr, ret_attr; |
1da177e4 LT |
1175 | |
1176 | unsigned char *mac_addr_p; | |
1177 | unsigned int *mcastFilterSize_p; | |
1178 | ||
1179 | ||
d7fbeba6 | 1180 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1181 | dev->unit_address); |
1182 | ||
493a684a ME |
1183 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1184 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1185 | if(!mac_addr_p) { |
1186 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1187 | "attribute\n", __FILE__, __LINE__); | |
1188 | return 0; | |
1189 | } | |
d7fbeba6 | 1190 | |
493a684a ME |
1191 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1192 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1193 | if(!mcastFilterSize_p) { |
1194 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1195 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1196 | __FILE__, __LINE__); | |
1197 | return 0; | |
1198 | } | |
d7fbeba6 | 1199 | |
1da177e4 LT |
1200 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1201 | ||
1202 | if(!netdev) | |
1203 | return -ENOMEM; | |
1204 | ||
1205 | SET_MODULE_OWNER(netdev); | |
1206 | ||
1207 | adapter = netdev->priv; | |
1da177e4 LT |
1208 | dev->dev.driver_data = netdev; |
1209 | ||
1210 | adapter->vdev = dev; | |
1211 | adapter->netdev = netdev; | |
1212 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1213 | adapter->pool_config = 0; |
d7fbeba6 | 1214 | |
bea3348e SH |
1215 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1216 | ||
1da177e4 | 1217 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1218 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1219 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1220 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1221 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1222 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1223 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1224 | ||
1225 | if ((*mac_addr_p & 0x3) != 0x02) | |
1226 | mac_addr_p += 2; | |
1227 | ||
1228 | adapter->mac_addr = 0; | |
1229 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1230 | ||
1da177e4 LT |
1231 | netdev->irq = dev->irq; |
1232 | netdev->open = ibmveth_open; | |
1da177e4 LT |
1233 | netdev->stop = ibmveth_close; |
1234 | netdev->hard_start_xmit = ibmveth_start_xmit; | |
1235 | netdev->get_stats = ibmveth_get_stats; | |
1236 | netdev->set_multicast_list = ibmveth_set_multicast_list; | |
1237 | netdev->do_ioctl = ibmveth_ioctl; | |
1238 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1239 | netdev->change_mtu = ibmveth_change_mtu; | |
1240 | SET_NETDEV_DEV(netdev, &dev->dev); | |
6b422374 SL |
1241 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1242 | netdev->poll_controller = ibmveth_poll_controller; | |
1243 | #endif | |
d7fbeba6 | 1244 | netdev->features |= NETIF_F_LLTX; |
60296d9e | 1245 | spin_lock_init(&adapter->stats_lock); |
1da177e4 LT |
1246 | |
1247 | memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); | |
1248 | ||
860f242e SL |
1249 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1250 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
d7fbeba6 JG |
1251 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1252 | pool_count[i], pool_size[i], | |
860f242e SL |
1253 | pool_active[i]); |
1254 | kobj->parent = &dev->dev.kobj; | |
1255 | sprintf(kobj->name, "pool%d", i); | |
1256 | kobj->ktype = &ktype_veth_pool; | |
1257 | kobject_register(kobj); | |
1258 | } | |
1da177e4 LT |
1259 | |
1260 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1261 | ||
1da177e4 LT |
1262 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1263 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1264 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1265 | ||
1da177e4 LT |
1266 | ibmveth_debug_printk("registering netdev...\n"); |
1267 | ||
f4ff2872 BK |
1268 | ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc); |
1269 | ||
1270 | if (ret == H_SUCCESS && !ret_attr.fields.active_trunk && | |
1271 | !ret_attr.fields.trunk_priority && | |
1272 | ret_attr.fields.csum_offload_padded_pkt_support) { | |
1273 | set_attr.desc = 0; | |
1274 | set_attr.fields.tcp_csum_offload_ipv4 = 1; | |
1275 | ||
1276 | ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc, | |
1277 | &ret_attr.desc); | |
1278 | ||
5fc7e01c BK |
1279 | if (ret == H_SUCCESS) { |
1280 | adapter->rx_csum = 1; | |
f4ff2872 | 1281 | netdev->features |= NETIF_F_IP_CSUM; |
5fc7e01c | 1282 | } else |
f4ff2872 BK |
1283 | ret = h_illan_attributes(dev->unit_address, set_attr.desc, |
1284 | 0, &ret_attr.desc); | |
1285 | } | |
1286 | ||
1da177e4 LT |
1287 | rc = register_netdev(netdev); |
1288 | ||
1289 | if(rc) { | |
1290 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1291 | free_netdev(netdev); | |
1292 | return rc; | |
1293 | } | |
1294 | ||
1295 | ibmveth_debug_printk("registered\n"); | |
1296 | ||
1297 | ibmveth_proc_register_adapter(adapter); | |
1298 | ||
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1303 | { | |
1304 | struct net_device *netdev = dev->dev.driver_data; | |
1305 | struct ibmveth_adapter *adapter = netdev->priv; | |
860f242e SL |
1306 | int i; |
1307 | ||
1308 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
1309 | kobject_unregister(&adapter->rx_buff_pool[i].kobj); | |
1da177e4 LT |
1310 | |
1311 | unregister_netdev(netdev); | |
1312 | ||
1313 | ibmveth_proc_unregister_adapter(adapter); | |
1314 | ||
1315 | free_netdev(netdev); | |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | #ifdef CONFIG_PROC_FS | |
1320 | static void ibmveth_proc_register_driver(void) | |
1321 | { | |
457c4cbc | 1322 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1323 | if (ibmveth_proc_dir) { |
1324 | SET_MODULE_OWNER(ibmveth_proc_dir); | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | static void ibmveth_proc_unregister_driver(void) | |
1329 | { | |
457c4cbc | 1330 | remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1331 | } |
1332 | ||
d7fbeba6 | 1333 | static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4 LT |
1334 | { |
1335 | if (*pos == 0) { | |
1336 | return (void *)1; | |
1337 | } else { | |
1338 | return NULL; | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1343 | { | |
1344 | ++*pos; | |
1345 | return NULL; | |
1346 | } | |
1347 | ||
d7fbeba6 | 1348 | static void ibmveth_seq_stop(struct seq_file *seq, void *v) |
1da177e4 LT |
1349 | { |
1350 | } | |
1351 | ||
d7fbeba6 | 1352 | static int ibmveth_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1353 | { |
1354 | struct ibmveth_adapter *adapter = seq->private; | |
1355 | char *current_mac = ((char*) &adapter->netdev->dev_addr); | |
1356 | char *firmware_mac = ((char*) &adapter->mac_addr) ; | |
1357 | ||
1358 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1359 | |
1da177e4 | 1360 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
1da177e4 LT |
1361 | seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", |
1362 | current_mac[0], current_mac[1], current_mac[2], | |
1363 | current_mac[3], current_mac[4], current_mac[5]); | |
1364 | seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1365 | firmware_mac[0], firmware_mac[1], firmware_mac[2], | |
1366 | firmware_mac[3], firmware_mac[4], firmware_mac[5]); | |
d7fbeba6 | 1367 | |
1da177e4 LT |
1368 | seq_printf(seq, "\nAdapter Statistics:\n"); |
1369 | seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized); | |
1370 | seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send); | |
1371 | seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed); | |
1372 | seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed); | |
1373 | seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed); | |
1374 | seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles); | |
1375 | seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem); | |
1376 | seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure); | |
1377 | seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer); | |
1378 | seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1379 | |
1da177e4 LT |
1380 | return 0; |
1381 | } | |
1382 | static struct seq_operations ibmveth_seq_ops = { | |
1383 | .start = ibmveth_seq_start, | |
1384 | .next = ibmveth_seq_next, | |
1385 | .stop = ibmveth_seq_stop, | |
1386 | .show = ibmveth_seq_show, | |
1387 | }; | |
1388 | ||
1389 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1390 | { | |
1391 | struct seq_file *seq; | |
1392 | struct proc_dir_entry *proc; | |
1393 | int rc; | |
1394 | ||
1395 | rc = seq_open(file, &ibmveth_seq_ops); | |
1396 | if (!rc) { | |
1397 | /* recover the pointer buried in proc_dir_entry data */ | |
1398 | seq = file->private_data; | |
1399 | proc = PDE(inode); | |
1400 | seq->private = proc->data; | |
1401 | } | |
1402 | return rc; | |
1403 | } | |
1404 | ||
d54b1fdb | 1405 | static const struct file_operations ibmveth_proc_fops = { |
1da177e4 LT |
1406 | .owner = THIS_MODULE, |
1407 | .open = ibmveth_proc_open, | |
1408 | .read = seq_read, | |
1409 | .llseek = seq_lseek, | |
1410 | .release = seq_release, | |
1411 | }; | |
1412 | ||
1413 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1414 | { | |
1415 | struct proc_dir_entry *entry; | |
1416 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1417 | char u_addr[10]; |
1418 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1419 | entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir); | |
1da177e4 LT |
1420 | if (!entry) { |
1421 | ibmveth_error_printk("Cannot create adapter proc entry"); | |
1422 | } else { | |
1423 | entry->data = (void *) adapter; | |
1424 | entry->proc_fops = &ibmveth_proc_fops; | |
1425 | SET_MODULE_OWNER(entry); | |
1426 | } | |
1427 | } | |
1428 | return; | |
1429 | } | |
1430 | ||
1431 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1432 | { | |
1433 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1434 | char u_addr[10]; |
1435 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1436 | remove_proc_entry(u_addr, ibmveth_proc_dir); | |
1da177e4 LT |
1437 | } |
1438 | } | |
1439 | ||
1440 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1441 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1442 | { |
1443 | } | |
1444 | ||
d7fbeba6 | 1445 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1446 | { |
1447 | } | |
1448 | static void ibmveth_proc_register_driver(void) | |
1449 | { | |
1450 | } | |
1451 | ||
1452 | static void ibmveth_proc_unregister_driver(void) | |
1453 | { | |
1454 | } | |
1455 | #endif /* CONFIG_PROC_FS */ | |
1456 | ||
860f242e SL |
1457 | static struct attribute veth_active_attr; |
1458 | static struct attribute veth_num_attr; | |
1459 | static struct attribute veth_size_attr; | |
1460 | ||
1461 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1462 | struct attribute * attr, char * buf) | |
1463 | { | |
d7fbeba6 | 1464 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1465 | struct ibmveth_buff_pool, |
1466 | kobj); | |
1467 | ||
1468 | if (attr == &veth_active_attr) | |
1469 | return sprintf(buf, "%d\n", pool->active); | |
1470 | else if (attr == &veth_num_attr) | |
1471 | return sprintf(buf, "%d\n", pool->size); | |
1472 | else if (attr == &veth_size_attr) | |
1473 | return sprintf(buf, "%d\n", pool->buff_size); | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1478 | const char * buf, size_t count) | |
1479 | { | |
d7fbeba6 | 1480 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1481 | struct ibmveth_buff_pool, |
1482 | kobj); | |
d7fbeba6 | 1483 | struct net_device *netdev = |
860f242e SL |
1484 | container_of(kobj->parent, struct device, kobj)->driver_data; |
1485 | struct ibmveth_adapter *adapter = netdev->priv; | |
1486 | long value = simple_strtol(buf, NULL, 10); | |
1487 | long rc; | |
1488 | ||
1489 | if (attr == &veth_active_attr) { | |
1490 | if (value && !pool->active) { | |
4aa9c93e BK |
1491 | if (netif_running(netdev)) { |
1492 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1493 | ibmveth_error_printk("unable to alloc pool\n"); | |
1494 | return -ENOMEM; | |
1495 | } | |
1496 | pool->active = 1; | |
1497 | adapter->pool_config = 1; | |
1498 | ibmveth_close(netdev); | |
1499 | adapter->pool_config = 0; | |
1500 | if ((rc = ibmveth_open(netdev))) | |
1501 | return rc; | |
1502 | } else | |
1503 | pool->active = 1; | |
860f242e SL |
1504 | } else if (!value && pool->active) { |
1505 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1506 | int i; | |
1507 | /* Make sure there is a buffer pool with buffers that | |
1508 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1509 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1510 | if (pool == &adapter->rx_buff_pool[i]) |
1511 | continue; | |
1512 | if (!adapter->rx_buff_pool[i].active) | |
1513 | continue; | |
76b9cfcc BK |
1514 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1515 | break; | |
860f242e | 1516 | } |
76b9cfcc BK |
1517 | |
1518 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1519 | ibmveth_error_printk("no active pool >= MTU\n"); |
1520 | return -EPERM; | |
1521 | } | |
76b9cfcc BK |
1522 | |
1523 | pool->active = 0; | |
1524 | if (netif_running(netdev)) { | |
1525 | adapter->pool_config = 1; | |
1526 | ibmveth_close(netdev); | |
1527 | adapter->pool_config = 0; | |
1528 | if ((rc = ibmveth_open(netdev))) | |
1529 | return rc; | |
1530 | } | |
860f242e SL |
1531 | } |
1532 | } else if (attr == &veth_num_attr) { | |
1533 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1534 | return -EINVAL; | |
1535 | else { | |
4aa9c93e BK |
1536 | if (netif_running(netdev)) { |
1537 | adapter->pool_config = 1; | |
1538 | ibmveth_close(netdev); | |
1539 | adapter->pool_config = 0; | |
1540 | pool->size = value; | |
1541 | if ((rc = ibmveth_open(netdev))) | |
1542 | return rc; | |
1543 | } else | |
1544 | pool->size = value; | |
860f242e SL |
1545 | } |
1546 | } else if (attr == &veth_size_attr) { | |
1547 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1548 | return -EINVAL; | |
1549 | else { | |
4aa9c93e BK |
1550 | if (netif_running(netdev)) { |
1551 | adapter->pool_config = 1; | |
1552 | ibmveth_close(netdev); | |
1553 | adapter->pool_config = 0; | |
1554 | pool->buff_size = value; | |
1555 | if ((rc = ibmveth_open(netdev))) | |
1556 | return rc; | |
1557 | } else | |
1558 | pool->buff_size = value; | |
860f242e SL |
1559 | } |
1560 | } | |
1561 | ||
1562 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1563 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1564 | return count; |
1565 | } | |
1566 | ||
1567 | ||
1568 | #define ATTR(_name, _mode) \ | |
1569 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1570 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1571 | }; |
1572 | ||
1573 | static ATTR(active, 0644); | |
1574 | static ATTR(num, 0644); | |
1575 | static ATTR(size, 0644); | |
1576 | ||
1577 | static struct attribute * veth_pool_attrs[] = { | |
1578 | &veth_active_attr, | |
1579 | &veth_num_attr, | |
1580 | &veth_size_attr, | |
1581 | NULL, | |
1582 | }; | |
1583 | ||
1584 | static struct sysfs_ops veth_pool_ops = { | |
1585 | .show = veth_pool_show, | |
1586 | .store = veth_pool_store, | |
1587 | }; | |
1588 | ||
1589 | static struct kobj_type ktype_veth_pool = { | |
1590 | .release = NULL, | |
1591 | .sysfs_ops = &veth_pool_ops, | |
1592 | .default_attrs = veth_pool_attrs, | |
1593 | }; | |
1594 | ||
1595 | ||
1da177e4 LT |
1596 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1597 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1598 | { "", "" } |
1da177e4 | 1599 | }; |
1da177e4 LT |
1600 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1601 | ||
1602 | static struct vio_driver ibmveth_driver = { | |
6fdf5392 SR |
1603 | .id_table = ibmveth_device_table, |
1604 | .probe = ibmveth_probe, | |
1605 | .remove = ibmveth_remove, | |
1606 | .driver = { | |
1607 | .name = ibmveth_driver_name, | |
915124d8 | 1608 | .owner = THIS_MODULE, |
6fdf5392 | 1609 | } |
1da177e4 LT |
1610 | }; |
1611 | ||
1612 | static int __init ibmveth_module_init(void) | |
1613 | { | |
1614 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1615 | ||
1616 | ibmveth_proc_register_driver(); | |
1617 | ||
1618 | return vio_register_driver(&ibmveth_driver); | |
1619 | } | |
1620 | ||
1621 | static void __exit ibmveth_module_exit(void) | |
1622 | { | |
1623 | vio_unregister_driver(&ibmveth_driver); | |
1624 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1625 | } |
1da177e4 LT |
1626 | |
1627 | module_init(ibmveth_module_init); | |
1628 | module_exit(ibmveth_module_exit); |