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: | |
1da177e4 LT |
31 | - add support for sysfs |
32 | - possibly remove procfs support | |
33 | */ | |
34 | ||
1da177e4 | 35 | #include <linux/module.h> |
1da177e4 LT |
36 | #include <linux/types.h> |
37 | #include <linux/errno.h> | |
38 | #include <linux/ioport.h> | |
39 | #include <linux/dma-mapping.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/etherdevice.h> | |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/init.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/mm.h> | |
47 | #include <linux/ethtool.h> | |
48 | #include <linux/proc_fs.h> | |
f4ff2872 BK |
49 | #include <linux/in.h> |
50 | #include <linux/ip.h> | |
457c4cbc | 51 | #include <net/net_namespace.h> |
1da177e4 LT |
52 | #include <asm/semaphore.h> |
53 | #include <asm/hvcall.h> | |
54 | #include <asm/atomic.h> | |
1da177e4 LT |
55 | #include <asm/vio.h> |
56 | #include <asm/uaccess.h> | |
57 | #include <linux/seq_file.h> | |
58 | ||
59 | #include "ibmveth.h" | |
60 | ||
6af37fa9 | 61 | #undef DEBUG |
1da177e4 LT |
62 | |
63 | #define ibmveth_printk(fmt, args...) \ | |
f98baffb | 64 | printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) |
1da177e4 LT |
65 | |
66 | #define ibmveth_error_printk(fmt, args...) \ | |
67 | printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
68 | ||
69 | #ifdef DEBUG | |
70 | #define ibmveth_debug_printk_no_adapter(fmt, args...) \ | |
71 | printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) | |
72 | #define ibmveth_debug_printk(fmt, args...) \ | |
73 | printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
74 | #define ibmveth_assert(expr) \ | |
75 | if(!(expr)) { \ | |
76 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
77 | BUG(); \ | |
78 | } | |
79 | #else | |
80 | #define ibmveth_debug_printk_no_adapter(fmt, args...) | |
81 | #define ibmveth_debug_printk(fmt, args...) | |
d7fbeba6 | 82 | #define ibmveth_assert(expr) |
1da177e4 LT |
83 | #endif |
84 | ||
85 | static int ibmveth_open(struct net_device *dev); | |
86 | static int ibmveth_close(struct net_device *dev); | |
87 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
bea3348e | 88 | static int ibmveth_poll(struct napi_struct *napi, int budget); |
1da177e4 LT |
89 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
90 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev); | |
91 | static void ibmveth_set_multicast_list(struct net_device *dev); | |
92 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
93 | static void ibmveth_proc_register_driver(void); | |
94 | static void ibmveth_proc_unregister_driver(void); | |
95 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
96 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
7d12e780 | 97 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 98 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
860f242e | 99 | static struct kobj_type ktype_veth_pool; |
1da177e4 LT |
100 | |
101 | #ifdef CONFIG_PROC_FS | |
457c4cbc | 102 | #define IBMVETH_PROC_DIR "ibmveth" |
1da177e4 LT |
103 | static struct proc_dir_entry *ibmveth_proc_dir; |
104 | #endif | |
105 | ||
106 | static const char ibmveth_driver_name[] = "ibmveth"; | |
107 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
108 | #define ibmveth_driver_version "1.03" | |
109 | ||
110 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
111 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
112 | MODULE_LICENSE("GPL"); | |
113 | MODULE_VERSION(ibmveth_driver_version); | |
114 | ||
ddbb4de9 BK |
115 | struct ibmveth_stat { |
116 | char name[ETH_GSTRING_LEN]; | |
117 | int offset; | |
118 | }; | |
119 | ||
120 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
121 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
122 | ||
123 | struct ibmveth_stat ibmveth_stats[] = { | |
124 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
125 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
126 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
127 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
128 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
129 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
130 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
131 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
132 | }; | |
133 | ||
1da177e4 | 134 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
135 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
136 | { | |
137 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
138 | } | |
139 | ||
140 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
141 | { | |
142 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; | |
143 | } | |
144 | ||
1da177e4 LT |
145 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
146 | { | |
79ef4a4d | 147 | return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); |
1da177e4 LT |
148 | } |
149 | ||
150 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
151 | { | |
79ef4a4d | 152 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); |
1da177e4 LT |
153 | } |
154 | ||
155 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
156 | { | |
79ef4a4d | 157 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); |
1da177e4 LT |
158 | } |
159 | ||
160 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
161 | { | |
162 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
163 | } | |
164 | ||
f4ff2872 BK |
165 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
166 | { | |
79ef4a4d | 167 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); |
f4ff2872 BK |
168 | } |
169 | ||
1da177e4 | 170 | /* setup the initial settings for a buffer pool */ |
860f242e | 171 | 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 |
172 | { |
173 | pool->size = pool_size; | |
174 | pool->index = pool_index; | |
175 | pool->buff_size = buff_size; | |
176 | pool->threshold = pool_size / 2; | |
860f242e | 177 | pool->active = pool_active; |
1da177e4 LT |
178 | } |
179 | ||
180 | /* allocate and setup an buffer pool - called during open */ | |
181 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
182 | { | |
183 | int i; | |
184 | ||
d7fbeba6 | 185 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
186 | |
187 | if(!pool->free_map) { | |
188 | return -1; | |
189 | } | |
190 | ||
d7fbeba6 | 191 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
192 | if(!pool->dma_addr) { |
193 | kfree(pool->free_map); | |
194 | pool->free_map = NULL; | |
195 | return -1; | |
196 | } | |
197 | ||
198 | pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL); | |
199 | ||
200 | if(!pool->skbuff) { | |
201 | kfree(pool->dma_addr); | |
202 | pool->dma_addr = NULL; | |
203 | ||
204 | kfree(pool->free_map); | |
205 | pool->free_map = NULL; | |
206 | return -1; | |
207 | } | |
208 | ||
209 | memset(pool->skbuff, 0, sizeof(void*) * pool->size); | |
210 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); | |
211 | ||
212 | for(i = 0; i < pool->size; ++i) { | |
213 | pool->free_map[i] = i; | |
214 | } | |
215 | ||
216 | atomic_set(&pool->available, 0); | |
217 | pool->producer_index = 0; | |
218 | pool->consumer_index = 0; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | /* replenish the buffers for a pool. note that we don't need to | |
224 | * skb_reserve these since they are used for incoming... | |
225 | */ | |
226 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
227 | { | |
228 | u32 i; | |
229 | u32 count = pool->size - atomic_read(&pool->available); | |
230 | u32 buffers_added = 0; | |
231 | ||
232 | mb(); | |
233 | ||
234 | for(i = 0; i < count; ++i) { | |
235 | struct sk_buff *skb; | |
236 | unsigned int free_index, index; | |
237 | u64 correlator; | |
238 | union ibmveth_buf_desc desc; | |
239 | unsigned long lpar_rc; | |
240 | dma_addr_t dma_addr; | |
241 | ||
242 | skb = alloc_skb(pool->buff_size, GFP_ATOMIC); | |
243 | ||
244 | if(!skb) { | |
245 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
246 | adapter->replenish_no_mem++; | |
247 | break; | |
248 | } | |
249 | ||
047a66d4 DG |
250 | free_index = pool->consumer_index; |
251 | pool->consumer_index = (pool->consumer_index + 1) % pool->size; | |
1da177e4 | 252 | index = pool->free_map[free_index]; |
d7fbeba6 | 253 | |
1da177e4 LT |
254 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
255 | ibmveth_assert(pool->skbuff[index] == NULL); | |
256 | ||
257 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
258 | pool->buff_size, DMA_FROM_DEVICE); | |
259 | ||
260 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; | |
261 | pool->dma_addr[index] = dma_addr; | |
262 | pool->skbuff[index] = skb; | |
263 | ||
264 | correlator = ((u64)pool->index << 32) | index; | |
265 | *(u64*)skb->data = correlator; | |
266 | ||
79ef4a4d | 267 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 268 | desc.fields.address = dma_addr; |
1da177e4 LT |
269 | |
270 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 271 | |
706c8c93 | 272 | if(lpar_rc != H_SUCCESS) { |
82702d37 | 273 | pool->free_map[free_index] = index; |
1da177e4 | 274 | pool->skbuff[index] = NULL; |
751ae21c SL |
275 | if (pool->consumer_index == 0) |
276 | pool->consumer_index = pool->size - 1; | |
277 | else | |
278 | pool->consumer_index--; | |
1da177e4 LT |
279 | dma_unmap_single(&adapter->vdev->dev, |
280 | pool->dma_addr[index], pool->buff_size, | |
281 | DMA_FROM_DEVICE); | |
282 | dev_kfree_skb_any(skb); | |
283 | adapter->replenish_add_buff_failure++; | |
284 | break; | |
285 | } else { | |
286 | buffers_added++; | |
287 | adapter->replenish_add_buff_success++; | |
288 | } | |
289 | } | |
d7fbeba6 | 290 | |
1da177e4 LT |
291 | mb(); |
292 | atomic_add(buffers_added, &(pool->available)); | |
293 | } | |
294 | ||
e2adbcb4 | 295 | /* replenish routine */ |
d7fbeba6 | 296 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 297 | { |
b6d35182 SL |
298 | int i; |
299 | ||
1da177e4 LT |
300 | adapter->replenish_task_cycles++; |
301 | ||
b6d35182 SL |
302 | for(i = 0; i < IbmVethNumBufferPools; i++) |
303 | if(adapter->rx_buff_pool[i].active) | |
d7fbeba6 | 304 | ibmveth_replenish_buffer_pool(adapter, |
b6d35182 | 305 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
306 | |
307 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
308 | } |
309 | ||
310 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
311 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
312 | { | |
313 | int i; | |
314 | ||
b4558ea9 JJ |
315 | kfree(pool->free_map); |
316 | pool->free_map = NULL; | |
1da177e4 LT |
317 | |
318 | if(pool->skbuff && pool->dma_addr) { | |
319 | for(i = 0; i < pool->size; ++i) { | |
320 | struct sk_buff *skb = pool->skbuff[i]; | |
321 | if(skb) { | |
322 | dma_unmap_single(&adapter->vdev->dev, | |
323 | pool->dma_addr[i], | |
324 | pool->buff_size, | |
325 | DMA_FROM_DEVICE); | |
326 | dev_kfree_skb_any(skb); | |
327 | pool->skbuff[i] = NULL; | |
328 | } | |
329 | } | |
330 | } | |
331 | ||
332 | if(pool->dma_addr) { | |
333 | kfree(pool->dma_addr); | |
334 | pool->dma_addr = NULL; | |
335 | } | |
336 | ||
337 | if(pool->skbuff) { | |
338 | kfree(pool->skbuff); | |
339 | pool->skbuff = NULL; | |
340 | } | |
341 | } | |
342 | ||
343 | /* remove a buffer from a pool */ | |
344 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
345 | { | |
346 | unsigned int pool = correlator >> 32; | |
347 | unsigned int index = correlator & 0xffffffffUL; | |
348 | unsigned int free_index; | |
349 | struct sk_buff *skb; | |
350 | ||
351 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
352 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
353 | ||
354 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
355 | ||
356 | ibmveth_assert(skb != NULL); | |
357 | ||
358 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
359 | ||
360 | dma_unmap_single(&adapter->vdev->dev, | |
361 | adapter->rx_buff_pool[pool].dma_addr[index], | |
362 | adapter->rx_buff_pool[pool].buff_size, | |
363 | DMA_FROM_DEVICE); | |
364 | ||
047a66d4 DG |
365 | free_index = adapter->rx_buff_pool[pool].producer_index; |
366 | adapter->rx_buff_pool[pool].producer_index | |
367 | = (adapter->rx_buff_pool[pool].producer_index + 1) | |
368 | % adapter->rx_buff_pool[pool].size; | |
1da177e4 LT |
369 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
370 | ||
371 | mb(); | |
372 | ||
373 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
374 | } | |
375 | ||
376 | /* get the current buffer on the rx queue */ | |
377 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
378 | { | |
379 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
380 | unsigned int pool = correlator >> 32; | |
381 | unsigned int index = correlator & 0xffffffffUL; | |
382 | ||
383 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
384 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
385 | ||
386 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
387 | } | |
388 | ||
389 | /* recycle the current buffer on the rx queue */ | |
390 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
391 | { | |
392 | u32 q_index = adapter->rx_queue.index; | |
393 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
394 | unsigned int pool = correlator >> 32; | |
395 | unsigned int index = correlator & 0xffffffffUL; | |
396 | union ibmveth_buf_desc desc; | |
397 | unsigned long lpar_rc; | |
398 | ||
399 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
400 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
401 | ||
b6d35182 SL |
402 | if(!adapter->rx_buff_pool[pool].active) { |
403 | ibmveth_rxq_harvest_buffer(adapter); | |
404 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
405 | return; | |
406 | } | |
407 | ||
79ef4a4d BK |
408 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
409 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
410 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
411 | ||
412 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 413 | |
706c8c93 | 414 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
415 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
416 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
417 | } | |
418 | ||
419 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
420 | adapter->rx_queue.index = 0; | |
421 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
422 | } | |
423 | } | |
424 | ||
493a684a | 425 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
426 | { |
427 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
428 | ||
429 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
430 | adapter->rx_queue.index = 0; | |
431 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
432 | } | |
433 | } | |
434 | ||
435 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
436 | { | |
b6d35182 SL |
437 | int i; |
438 | ||
1da177e4 LT |
439 | if(adapter->buffer_list_addr != NULL) { |
440 | if(!dma_mapping_error(adapter->buffer_list_dma)) { | |
441 | dma_unmap_single(&adapter->vdev->dev, | |
442 | adapter->buffer_list_dma, 4096, | |
443 | DMA_BIDIRECTIONAL); | |
444 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
445 | } | |
446 | free_page((unsigned long)adapter->buffer_list_addr); | |
447 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 448 | } |
1da177e4 LT |
449 | |
450 | if(adapter->filter_list_addr != NULL) { | |
451 | if(!dma_mapping_error(adapter->filter_list_dma)) { | |
452 | dma_unmap_single(&adapter->vdev->dev, | |
453 | adapter->filter_list_dma, 4096, | |
454 | DMA_BIDIRECTIONAL); | |
455 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
456 | } | |
457 | free_page((unsigned long)adapter->filter_list_addr); | |
458 | adapter->filter_list_addr = NULL; | |
459 | } | |
460 | ||
461 | if(adapter->rx_queue.queue_addr != NULL) { | |
462 | if(!dma_mapping_error(adapter->rx_queue.queue_dma)) { | |
463 | dma_unmap_single(&adapter->vdev->dev, | |
464 | adapter->rx_queue.queue_dma, | |
465 | adapter->rx_queue.queue_len, | |
466 | DMA_BIDIRECTIONAL); | |
467 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
468 | } | |
469 | kfree(adapter->rx_queue.queue_addr); | |
470 | adapter->rx_queue.queue_addr = NULL; | |
471 | } | |
472 | ||
b6d35182 | 473 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 474 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 475 | ibmveth_free_buffer_pool(adapter, |
860f242e | 476 | &adapter->rx_buff_pool[i]); |
1da177e4 LT |
477 | } |
478 | ||
bbedefcc ME |
479 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
480 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
481 | { | |
482 | int rc, try_again = 1; | |
483 | ||
484 | /* After a kexec the adapter will still be open, so our attempt to | |
485 | * open it will fail. So if we get a failure we free the adapter and | |
486 | * try again, but only once. */ | |
487 | retry: | |
488 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
489 | adapter->buffer_list_dma, rxq_desc.desc, | |
490 | adapter->filter_list_dma, mac_address); | |
491 | ||
492 | if (rc != H_SUCCESS && try_again) { | |
493 | do { | |
494 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
495 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
496 | ||
497 | try_again = 0; | |
498 | goto retry; | |
499 | } | |
500 | ||
501 | return rc; | |
502 | } | |
503 | ||
1da177e4 LT |
504 | static int ibmveth_open(struct net_device *netdev) |
505 | { | |
506 | struct ibmveth_adapter *adapter = netdev->priv; | |
507 | u64 mac_address = 0; | |
b6d35182 | 508 | int rxq_entries = 1; |
1da177e4 LT |
509 | unsigned long lpar_rc; |
510 | int rc; | |
511 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 512 | int i; |
1da177e4 LT |
513 | |
514 | ibmveth_debug_printk("open starting\n"); | |
515 | ||
bea3348e SH |
516 | napi_enable(&adapter->napi); |
517 | ||
b6d35182 SL |
518 | for(i = 0; i<IbmVethNumBufferPools; i++) |
519 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 520 | |
1da177e4 LT |
521 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
522 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 523 | |
1da177e4 LT |
524 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
525 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
526 | ibmveth_cleanup(adapter); | |
bea3348e | 527 | napi_disable(&adapter->napi); |
1da177e4 LT |
528 | return -ENOMEM; |
529 | } | |
530 | ||
531 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
532 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
533 | ||
534 | if(!adapter->rx_queue.queue_addr) { | |
535 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
536 | ibmveth_cleanup(adapter); | |
bea3348e | 537 | napi_disable(&adapter->napi); |
1da177e4 LT |
538 | return -ENOMEM; |
539 | } | |
540 | ||
541 | adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev, | |
542 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); | |
543 | adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev, | |
544 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); | |
545 | adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev, | |
546 | adapter->rx_queue.queue_addr, | |
547 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
548 | ||
549 | if((dma_mapping_error(adapter->buffer_list_dma) ) || | |
550 | (dma_mapping_error(adapter->filter_list_dma)) || | |
551 | (dma_mapping_error(adapter->rx_queue.queue_dma))) { | |
552 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); | |
553 | ibmveth_cleanup(adapter); | |
bea3348e | 554 | napi_disable(&adapter->napi); |
1da177e4 LT |
555 | return -ENOMEM; |
556 | } | |
557 | ||
558 | adapter->rx_queue.index = 0; | |
559 | adapter->rx_queue.num_slots = rxq_entries; | |
560 | adapter->rx_queue.toggle = 1; | |
561 | ||
1da177e4 LT |
562 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
563 | mac_address = mac_address >> 16; | |
564 | ||
79ef4a4d | 565 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; |
1da177e4 LT |
566 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
567 | ||
568 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
569 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
570 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
571 | ||
4347ef15 SL |
572 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
573 | ||
bbedefcc | 574 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 575 | |
706c8c93 | 576 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 577 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
8168f902 | 578 | ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n", |
1da177e4 LT |
579 | adapter->buffer_list_dma, |
580 | adapter->filter_list_dma, | |
581 | rxq_desc.desc, | |
582 | mac_address); | |
583 | ibmveth_cleanup(adapter); | |
bea3348e | 584 | napi_disable(&adapter->napi); |
d7fbeba6 | 585 | return -ENONET; |
1da177e4 LT |
586 | } |
587 | ||
860f242e SL |
588 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
589 | if(!adapter->rx_buff_pool[i].active) | |
590 | continue; | |
591 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
592 | ibmveth_error_printk("unable to alloc pool\n"); | |
593 | adapter->rx_buff_pool[i].active = 0; | |
594 | ibmveth_cleanup(adapter); | |
bea3348e | 595 | napi_disable(&adapter->napi); |
860f242e SL |
596 | return -ENOMEM ; |
597 | } | |
598 | } | |
599 | ||
1da177e4 LT |
600 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
601 | if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { | |
602 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); | |
603 | do { | |
604 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 605 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
606 | |
607 | ibmveth_cleanup(adapter); | |
bea3348e | 608 | napi_disable(&adapter->napi); |
1da177e4 LT |
609 | return rc; |
610 | } | |
611 | ||
e2adbcb4 | 612 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 613 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 614 | |
e2adbcb4 | 615 | netif_start_queue(netdev); |
1da177e4 LT |
616 | |
617 | ibmveth_debug_printk("open complete\n"); | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | static int ibmveth_close(struct net_device *netdev) | |
623 | { | |
624 | struct ibmveth_adapter *adapter = netdev->priv; | |
625 | long lpar_rc; | |
d7fbeba6 | 626 | |
1da177e4 LT |
627 | ibmveth_debug_printk("close starting\n"); |
628 | ||
bea3348e SH |
629 | napi_disable(&adapter->napi); |
630 | ||
860f242e SL |
631 | if (!adapter->pool_config) |
632 | netif_stop_queue(netdev); | |
1da177e4 LT |
633 | |
634 | free_irq(netdev->irq, netdev); | |
635 | ||
1da177e4 LT |
636 | do { |
637 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 638 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 639 | |
706c8c93 | 640 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
641 | { |
642 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
643 | lpar_rc); | |
644 | } | |
645 | ||
646 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
647 | ||
648 | ibmveth_cleanup(adapter); | |
649 | ||
650 | ibmveth_debug_printk("close complete\n"); | |
651 | ||
652 | return 0; | |
653 | } | |
654 | ||
655 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
656 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
657 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
658 | cmd->speed = SPEED_1000; | |
659 | cmd->duplex = DUPLEX_FULL; | |
660 | cmd->port = PORT_FIBRE; | |
661 | cmd->phy_address = 0; | |
662 | cmd->transceiver = XCVR_INTERNAL; | |
663 | cmd->autoneg = AUTONEG_ENABLE; | |
664 | cmd->maxtxpkt = 0; | |
665 | cmd->maxrxpkt = 1; | |
666 | return 0; | |
667 | } | |
668 | ||
669 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
670 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
671 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
672 | } | |
673 | ||
674 | static u32 netdev_get_link(struct net_device *dev) { | |
675 | return 1; | |
676 | } | |
677 | ||
5fc7e01c BK |
678 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
679 | { | |
680 | struct ibmveth_adapter *adapter = dev->priv; | |
681 | ||
682 | if (data) | |
683 | adapter->rx_csum = 1; | |
684 | else { | |
685 | /* | |
686 | * Since the ibmveth firmware interface does not have the concept of | |
687 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
688 | * we also have to disable tx checksum offload. Once we disable rx | |
689 | * checksum offload, we are no longer allowed to send tx buffers that | |
690 | * are not properly checksummed. | |
691 | */ | |
692 | adapter->rx_csum = 0; | |
693 | dev->features &= ~NETIF_F_IP_CSUM; | |
694 | } | |
695 | } | |
696 | ||
697 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
698 | { | |
699 | struct ibmveth_adapter *adapter = dev->priv; | |
700 | ||
701 | if (data) { | |
702 | dev->features |= NETIF_F_IP_CSUM; | |
703 | adapter->rx_csum = 1; | |
704 | } else | |
705 | dev->features &= ~NETIF_F_IP_CSUM; | |
706 | } | |
707 | ||
708 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
709 | void (*done) (struct net_device *, u32)) | |
710 | { | |
711 | struct ibmveth_adapter *adapter = dev->priv; | |
79ef4a4d | 712 | u64 set_attr, clr_attr, ret_attr; |
5fc7e01c BK |
713 | long ret; |
714 | int rc1 = 0, rc2 = 0; | |
715 | int restart = 0; | |
716 | ||
717 | if (netif_running(dev)) { | |
718 | restart = 1; | |
719 | adapter->pool_config = 1; | |
720 | ibmveth_close(dev); | |
721 | adapter->pool_config = 0; | |
722 | } | |
723 | ||
79ef4a4d BK |
724 | set_attr = 0; |
725 | clr_attr = 0; | |
5fc7e01c BK |
726 | |
727 | if (data) | |
79ef4a4d | 728 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
5fc7e01c | 729 | else |
79ef4a4d | 730 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
5fc7e01c | 731 | |
79ef4a4d | 732 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 733 | |
79ef4a4d BK |
734 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
735 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
736 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
737 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
738 | set_attr, &ret_attr); | |
5fc7e01c BK |
739 | |
740 | if (ret != H_SUCCESS) { | |
741 | rc1 = -EIO; | |
742 | ibmveth_error_printk("unable to change checksum offload settings." | |
743 | " %d rc=%ld\n", data, ret); | |
744 | ||
745 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
79ef4a4d | 746 | set_attr, clr_attr, &ret_attr); |
5fc7e01c BK |
747 | } else |
748 | done(dev, data); | |
749 | } else { | |
750 | rc1 = -EIO; | |
751 | ibmveth_error_printk("unable to change checksum offload settings." | |
79ef4a4d | 752 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr); |
5fc7e01c BK |
753 | } |
754 | ||
755 | if (restart) | |
756 | rc2 = ibmveth_open(dev); | |
757 | ||
758 | return rc1 ? rc1 : rc2; | |
759 | } | |
760 | ||
761 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
762 | { | |
763 | struct ibmveth_adapter *adapter = dev->priv; | |
764 | ||
765 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
766 | return 0; | |
767 | ||
768 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
769 | } | |
770 | ||
771 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
772 | { | |
773 | struct ibmveth_adapter *adapter = dev->priv; | |
774 | int rc = 0; | |
775 | ||
776 | if (data && (dev->features & NETIF_F_IP_CSUM)) | |
777 | return 0; | |
778 | if (!data && !(dev->features & NETIF_F_IP_CSUM)) | |
779 | return 0; | |
780 | ||
781 | if (data && !adapter->rx_csum) | |
782 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
783 | else | |
784 | ibmveth_set_tx_csum_flags(dev, data); | |
785 | ||
786 | return rc; | |
787 | } | |
788 | ||
789 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
790 | { | |
791 | struct ibmveth_adapter *adapter = dev->priv; | |
792 | return adapter->rx_csum; | |
793 | } | |
794 | ||
ddbb4de9 BK |
795 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
796 | { | |
797 | int i; | |
798 | ||
799 | if (stringset != ETH_SS_STATS) | |
800 | return; | |
801 | ||
802 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
803 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
804 | } | |
805 | ||
806 | static int ibmveth_get_stats_count(struct net_device *dev) | |
807 | { | |
808 | return ARRAY_SIZE(ibmveth_stats); | |
809 | } | |
810 | ||
811 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
812 | struct ethtool_stats *stats, u64 *data) | |
813 | { | |
814 | int i; | |
815 | struct ibmveth_adapter *adapter = dev->priv; | |
816 | ||
817 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
818 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
819 | } | |
820 | ||
7282d491 | 821 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
822 | .get_drvinfo = netdev_get_drvinfo, |
823 | .get_settings = netdev_get_settings, | |
824 | .get_link = netdev_get_link, | |
825 | .get_sg = ethtool_op_get_sg, | |
826 | .get_tx_csum = ethtool_op_get_tx_csum, | |
5fc7e01c BK |
827 | .set_tx_csum = ibmveth_set_tx_csum, |
828 | .get_rx_csum = ibmveth_get_rx_csum, | |
829 | .set_rx_csum = ibmveth_set_rx_csum, | |
80e53677 BK |
830 | .get_tso = ethtool_op_get_tso, |
831 | .get_ufo = ethtool_op_get_ufo, | |
ddbb4de9 BK |
832 | .get_strings = ibmveth_get_strings, |
833 | .get_stats_count = ibmveth_get_stats_count, | |
834 | .get_ethtool_stats = ibmveth_get_ethtool_stats, | |
1da177e4 LT |
835 | }; |
836 | ||
837 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
838 | { | |
839 | return -EOPNOTSUPP; | |
840 | } | |
841 | ||
842 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
843 | ||
844 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
845 | { | |
846 | struct ibmveth_adapter *adapter = netdev->priv; | |
3449a2ab | 847 | union ibmveth_buf_desc desc; |
1da177e4 | 848 | unsigned long lpar_rc; |
1da177e4 | 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 | ||
79ef4a4d | 858 | desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len; |
3449a2ab | 859 | desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data, |
79ef4a4d | 860 | skb->len, DMA_TO_DEVICE); |
1da177e4 | 861 | |
f4ff2872 BK |
862 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
863 | ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { | |
864 | ibmveth_error_printk("tx: failed to checksum packet\n"); | |
865 | tx_dropped++; | |
866 | goto out; | |
867 | } | |
868 | ||
869 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
870 | unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; | |
871 | ||
79ef4a4d | 872 | desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
873 | |
874 | /* Need to zero out the checksum */ | |
875 | buf[0] = 0; | |
876 | buf[1] = 0; | |
877 | } | |
878 | ||
3449a2ab BK |
879 | if (dma_mapping_error(desc.fields.address)) { |
880 | ibmveth_error_printk("tx: unable to map xmit buffer\n"); | |
60296d9e SL |
881 | tx_map_failed++; |
882 | tx_dropped++; | |
883 | goto out; | |
1da177e4 LT |
884 | } |
885 | ||
1da177e4 LT |
886 | /* send the frame. Arbitrarily set retrycount to 1024 */ |
887 | correlator = 0; | |
888 | retry_count = 1024; | |
889 | do { | |
890 | lpar_rc = h_send_logical_lan(adapter->vdev->unit_address, | |
3449a2ab BK |
891 | desc.desc, 0, 0, 0, 0, 0, |
892 | correlator, &correlator); | |
706c8c93 | 893 | } while ((lpar_rc == H_BUSY) && (retry_count--)); |
d7fbeba6 | 894 | |
706c8c93 | 895 | if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) { |
1da177e4 | 896 | ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); |
3449a2ab | 897 | ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n", |
79ef4a4d BK |
898 | (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0, |
899 | skb->len, desc.fields.address); | |
60296d9e SL |
900 | tx_send_failed++; |
901 | tx_dropped++; | |
1da177e4 | 902 | } else { |
60296d9e SL |
903 | tx_packets++; |
904 | tx_bytes += skb->len; | |
0abe791e | 905 | netdev->trans_start = jiffies; |
1da177e4 LT |
906 | } |
907 | ||
3449a2ab | 908 | dma_unmap_single(&adapter->vdev->dev, desc.fields.address, |
79ef4a4d | 909 | skb->len, DMA_TO_DEVICE); |
1da177e4 | 910 | |
60296d9e SL |
911 | out: spin_lock_irqsave(&adapter->stats_lock, flags); |
912 | adapter->stats.tx_dropped += tx_dropped; | |
913 | adapter->stats.tx_bytes += tx_bytes; | |
914 | adapter->stats.tx_packets += tx_packets; | |
915 | adapter->tx_send_failed += tx_send_failed; | |
916 | adapter->tx_map_failed += tx_map_failed; | |
917 | spin_unlock_irqrestore(&adapter->stats_lock, flags); | |
918 | ||
1da177e4 LT |
919 | dev_kfree_skb(skb); |
920 | return 0; | |
921 | } | |
922 | ||
bea3348e | 923 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 924 | { |
bea3348e SH |
925 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
926 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 927 | int frames_processed = 0; |
1da177e4 LT |
928 | unsigned long lpar_rc; |
929 | ||
930 | restart_poll: | |
931 | do { | |
bea3348e | 932 | struct sk_buff *skb; |
1da177e4 | 933 | |
bea3348e SH |
934 | if (!ibmveth_rxq_pending_buffer(adapter)) |
935 | break; | |
1da177e4 | 936 | |
bea3348e SH |
937 | rmb(); |
938 | if (!ibmveth_rxq_buffer_valid(adapter)) { | |
939 | wmb(); /* suggested by larson1 */ | |
940 | adapter->rx_invalid_buffer++; | |
941 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
942 | ibmveth_rxq_recycle_buffer(adapter); | |
943 | } else { | |
944 | int length = ibmveth_rxq_frame_length(adapter); | |
945 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
946 | int csum_good = ibmveth_rxq_csum_good(adapter); |
947 | ||
bea3348e | 948 | skb = ibmveth_rxq_get_buffer(adapter); |
f4ff2872 BK |
949 | if (csum_good) |
950 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1da177e4 | 951 | |
bea3348e | 952 | ibmveth_rxq_harvest_buffer(adapter); |
1da177e4 | 953 | |
bea3348e SH |
954 | skb_reserve(skb, offset); |
955 | skb_put(skb, length); | |
956 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 957 | |
bea3348e | 958 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 959 | |
bea3348e SH |
960 | adapter->stats.rx_packets++; |
961 | adapter->stats.rx_bytes += length; | |
962 | frames_processed++; | |
963 | netdev->last_rx = jiffies; | |
1da177e4 | 964 | } |
bea3348e | 965 | } while (frames_processed < budget); |
1da177e4 | 966 | |
e2adbcb4 | 967 | ibmveth_replenish_task(adapter); |
1da177e4 | 968 | |
bea3348e SH |
969 | if (frames_processed < budget) { |
970 | /* We think we are done - reenable interrupts, | |
971 | * then check once more to make sure we are done. | |
972 | */ | |
973 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
974 | VIO_IRQ_ENABLE); | |
1da177e4 | 975 | |
bea3348e | 976 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 977 | |
bea3348e | 978 | netif_rx_complete(netdev, napi); |
1da177e4 | 979 | |
bea3348e SH |
980 | if (ibmveth_rxq_pending_buffer(adapter) && |
981 | netif_rx_reschedule(netdev, napi)) { | |
982 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
983 | VIO_IRQ_DISABLE); | |
984 | goto restart_poll; | |
985 | } | |
1da177e4 LT |
986 | } |
987 | ||
bea3348e | 988 | return frames_processed; |
1da177e4 LT |
989 | } |
990 | ||
7d12e780 | 991 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 992 | { |
1da177e4 LT |
993 | struct net_device *netdev = dev_instance; |
994 | struct ibmveth_adapter *adapter = netdev->priv; | |
995 | unsigned long lpar_rc; | |
996 | ||
bea3348e SH |
997 | if (netif_rx_schedule_prep(netdev, &adapter->napi)) { |
998 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
999 | VIO_IRQ_DISABLE); | |
706c8c93 | 1000 | ibmveth_assert(lpar_rc == H_SUCCESS); |
bea3348e | 1001 | __netif_rx_schedule(netdev, &adapter->napi); |
1da177e4 LT |
1002 | } |
1003 | return IRQ_HANDLED; | |
1004 | } | |
1005 | ||
1006 | static struct net_device_stats *ibmveth_get_stats(struct net_device *dev) | |
1007 | { | |
1008 | struct ibmveth_adapter *adapter = dev->priv; | |
1009 | return &adapter->stats; | |
1010 | } | |
1011 | ||
1012 | static void ibmveth_set_multicast_list(struct net_device *netdev) | |
1013 | { | |
1014 | struct ibmveth_adapter *adapter = netdev->priv; | |
1015 | unsigned long lpar_rc; | |
1016 | ||
1017 | if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) { | |
1018 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1019 | IbmVethMcastEnableRecv | | |
1020 | IbmVethMcastDisableFiltering, | |
1021 | 0); | |
706c8c93 | 1022 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1023 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1024 | } | |
1025 | } else { | |
1026 | struct dev_mc_list *mclist = netdev->mc_list; | |
1027 | int i; | |
1028 | /* clear the filter table & disable filtering */ | |
1029 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1030 | IbmVethMcastEnableRecv | | |
1031 | IbmVethMcastDisableFiltering | | |
1032 | IbmVethMcastClearFilterTable, | |
1033 | 0); | |
706c8c93 | 1034 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1035 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1036 | } | |
1037 | /* add the addresses to the filter table */ | |
1038 | for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) { | |
1039 | // add the multicast address to the filter table | |
1040 | unsigned long mcast_addr = 0; | |
1041 | memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6); | |
1042 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1043 | IbmVethMcastAddFilter, | |
1044 | mcast_addr); | |
706c8c93 | 1045 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1046 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1047 | } | |
1048 | } | |
d7fbeba6 | 1049 | |
1da177e4 LT |
1050 | /* re-enable filtering */ |
1051 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1052 | IbmVethMcastEnableFiltering, | |
1053 | 0); | |
706c8c93 | 1054 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1055 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1061 | { | |
b6d35182 | 1062 | struct ibmveth_adapter *adapter = dev->priv; |
860f242e | 1063 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
ce6eea58 BK |
1064 | int reinit = 0; |
1065 | int i, rc; | |
b6d35182 | 1066 | |
860f242e | 1067 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1068 | return -EINVAL; |
b6d35182 | 1069 | |
ce6eea58 BK |
1070 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1071 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1072 | break; | |
1073 | ||
1074 | if (i == IbmVethNumBufferPools) | |
1075 | return -EINVAL; | |
1076 | ||
860f242e | 1077 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1078 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ce6eea58 BK |
1079 | if (!adapter->rx_buff_pool[i].active) { |
1080 | adapter->rx_buff_pool[i].active = 1; | |
1081 | reinit = 1; | |
1082 | } | |
1083 | ||
860f242e | 1084 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
ce6eea58 BK |
1085 | if (reinit && netif_running(adapter->netdev)) { |
1086 | adapter->pool_config = 1; | |
1087 | ibmveth_close(adapter->netdev); | |
1088 | adapter->pool_config = 0; | |
1089 | dev->mtu = new_mtu; | |
1090 | if ((rc = ibmveth_open(adapter->netdev))) | |
1091 | return rc; | |
1092 | } else | |
1093 | dev->mtu = new_mtu; | |
860f242e | 1094 | return 0; |
b6d35182 | 1095 | } |
b6d35182 | 1096 | } |
860f242e | 1097 | return -EINVAL; |
1da177e4 LT |
1098 | } |
1099 | ||
6b422374 SL |
1100 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1101 | static void ibmveth_poll_controller(struct net_device *dev) | |
1102 | { | |
1103 | ibmveth_replenish_task(dev->priv); | |
5f77113c | 1104 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1105 | } |
1106 | #endif | |
1107 | ||
1da177e4 LT |
1108 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1109 | { | |
b6d35182 | 1110 | int rc, i; |
f4ff2872 | 1111 | long ret; |
1da177e4 | 1112 | struct net_device *netdev; |
9dc83afd | 1113 | struct ibmveth_adapter *adapter; |
79ef4a4d | 1114 | u64 set_attr, ret_attr; |
1da177e4 LT |
1115 | |
1116 | unsigned char *mac_addr_p; | |
1117 | unsigned int *mcastFilterSize_p; | |
1118 | ||
1119 | ||
d7fbeba6 | 1120 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1121 | dev->unit_address); |
1122 | ||
493a684a ME |
1123 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1124 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1125 | if(!mac_addr_p) { |
1126 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1127 | "attribute\n", __FILE__, __LINE__); | |
1128 | return 0; | |
1129 | } | |
d7fbeba6 | 1130 | |
493a684a ME |
1131 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1132 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1133 | if(!mcastFilterSize_p) { |
1134 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1135 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1136 | __FILE__, __LINE__); | |
1137 | return 0; | |
1138 | } | |
d7fbeba6 | 1139 | |
1da177e4 LT |
1140 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1141 | ||
1142 | if(!netdev) | |
1143 | return -ENOMEM; | |
1144 | ||
1da177e4 | 1145 | adapter = netdev->priv; |
1da177e4 LT |
1146 | dev->dev.driver_data = netdev; |
1147 | ||
1148 | adapter->vdev = dev; | |
1149 | adapter->netdev = netdev; | |
1150 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1151 | adapter->pool_config = 0; |
d7fbeba6 | 1152 | |
bea3348e SH |
1153 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1154 | ||
1da177e4 | 1155 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1156 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1157 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1158 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1159 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1160 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1161 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1162 | ||
1163 | if ((*mac_addr_p & 0x3) != 0x02) | |
1164 | mac_addr_p += 2; | |
1165 | ||
1166 | adapter->mac_addr = 0; | |
1167 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1168 | ||
1da177e4 LT |
1169 | netdev->irq = dev->irq; |
1170 | netdev->open = ibmveth_open; | |
1da177e4 LT |
1171 | netdev->stop = ibmveth_close; |
1172 | netdev->hard_start_xmit = ibmveth_start_xmit; | |
1173 | netdev->get_stats = ibmveth_get_stats; | |
1174 | netdev->set_multicast_list = ibmveth_set_multicast_list; | |
1175 | netdev->do_ioctl = ibmveth_ioctl; | |
1176 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1177 | netdev->change_mtu = ibmveth_change_mtu; | |
1178 | SET_NETDEV_DEV(netdev, &dev->dev); | |
6b422374 SL |
1179 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1180 | netdev->poll_controller = ibmveth_poll_controller; | |
1181 | #endif | |
d7fbeba6 | 1182 | netdev->features |= NETIF_F_LLTX; |
60296d9e | 1183 | spin_lock_init(&adapter->stats_lock); |
1da177e4 LT |
1184 | |
1185 | memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); | |
1186 | ||
860f242e SL |
1187 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1188 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
d7fbeba6 JG |
1189 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1190 | pool_count[i], pool_size[i], | |
860f242e SL |
1191 | pool_active[i]); |
1192 | kobj->parent = &dev->dev.kobj; | |
1193 | sprintf(kobj->name, "pool%d", i); | |
1194 | kobj->ktype = &ktype_veth_pool; | |
1195 | kobject_register(kobj); | |
1196 | } | |
1da177e4 LT |
1197 | |
1198 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1199 | ||
1da177e4 LT |
1200 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1201 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1202 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1203 | ||
1da177e4 LT |
1204 | ibmveth_debug_printk("registering netdev...\n"); |
1205 | ||
79ef4a4d | 1206 | ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr); |
f4ff2872 | 1207 | |
79ef4a4d BK |
1208 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
1209 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
1210 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
1211 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; | |
f4ff2872 | 1212 | |
79ef4a4d | 1213 | ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr); |
f4ff2872 | 1214 | |
5fc7e01c BK |
1215 | if (ret == H_SUCCESS) { |
1216 | adapter->rx_csum = 1; | |
f4ff2872 | 1217 | netdev->features |= NETIF_F_IP_CSUM; |
5fc7e01c | 1218 | } else |
79ef4a4d | 1219 | ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr); |
f4ff2872 BK |
1220 | } |
1221 | ||
1da177e4 LT |
1222 | rc = register_netdev(netdev); |
1223 | ||
1224 | if(rc) { | |
1225 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1226 | free_netdev(netdev); | |
1227 | return rc; | |
1228 | } | |
1229 | ||
1230 | ibmveth_debug_printk("registered\n"); | |
1231 | ||
1232 | ibmveth_proc_register_adapter(adapter); | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1238 | { | |
1239 | struct net_device *netdev = dev->dev.driver_data; | |
1240 | struct ibmveth_adapter *adapter = netdev->priv; | |
860f242e SL |
1241 | int i; |
1242 | ||
1243 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
1244 | kobject_unregister(&adapter->rx_buff_pool[i].kobj); | |
1da177e4 LT |
1245 | |
1246 | unregister_netdev(netdev); | |
1247 | ||
1248 | ibmveth_proc_unregister_adapter(adapter); | |
1249 | ||
1250 | free_netdev(netdev); | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | #ifdef CONFIG_PROC_FS | |
1255 | static void ibmveth_proc_register_driver(void) | |
1256 | { | |
457c4cbc | 1257 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 | 1258 | if (ibmveth_proc_dir) { |
1da177e4 LT |
1259 | } |
1260 | } | |
1261 | ||
1262 | static void ibmveth_proc_unregister_driver(void) | |
1263 | { | |
457c4cbc | 1264 | remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1265 | } |
1266 | ||
d7fbeba6 | 1267 | static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) |
1da177e4 LT |
1268 | { |
1269 | if (*pos == 0) { | |
1270 | return (void *)1; | |
1271 | } else { | |
1272 | return NULL; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1277 | { | |
1278 | ++*pos; | |
1279 | return NULL; | |
1280 | } | |
1281 | ||
d7fbeba6 | 1282 | static void ibmveth_seq_stop(struct seq_file *seq, void *v) |
1da177e4 LT |
1283 | { |
1284 | } | |
1285 | ||
d7fbeba6 | 1286 | static int ibmveth_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1287 | { |
1288 | struct ibmveth_adapter *adapter = seq->private; | |
1289 | char *current_mac = ((char*) &adapter->netdev->dev_addr); | |
1290 | char *firmware_mac = ((char*) &adapter->mac_addr) ; | |
1291 | ||
1292 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1293 | |
1da177e4 | 1294 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
1da177e4 LT |
1295 | seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", |
1296 | current_mac[0], current_mac[1], current_mac[2], | |
1297 | current_mac[3], current_mac[4], current_mac[5]); | |
1298 | seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", | |
1299 | firmware_mac[0], firmware_mac[1], firmware_mac[2], | |
1300 | firmware_mac[3], firmware_mac[4], firmware_mac[5]); | |
d7fbeba6 | 1301 | |
1da177e4 | 1302 | seq_printf(seq, "\nAdapter Statistics:\n"); |
3449a2ab | 1303 | seq_printf(seq, " TX: vio_map_single failres: %ld\n", adapter->tx_map_failed); |
1da177e4 LT |
1304 | seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed); |
1305 | seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles); | |
1306 | seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem); | |
1307 | seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure); | |
1308 | seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer); | |
1309 | seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1310 | |
1da177e4 LT |
1311 | return 0; |
1312 | } | |
1313 | static struct seq_operations ibmveth_seq_ops = { | |
1314 | .start = ibmveth_seq_start, | |
1315 | .next = ibmveth_seq_next, | |
1316 | .stop = ibmveth_seq_stop, | |
1317 | .show = ibmveth_seq_show, | |
1318 | }; | |
1319 | ||
1320 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1321 | { | |
1322 | struct seq_file *seq; | |
1323 | struct proc_dir_entry *proc; | |
1324 | int rc; | |
1325 | ||
1326 | rc = seq_open(file, &ibmveth_seq_ops); | |
1327 | if (!rc) { | |
1328 | /* recover the pointer buried in proc_dir_entry data */ | |
1329 | seq = file->private_data; | |
1330 | proc = PDE(inode); | |
1331 | seq->private = proc->data; | |
1332 | } | |
1333 | return rc; | |
1334 | } | |
1335 | ||
d54b1fdb | 1336 | static const struct file_operations ibmveth_proc_fops = { |
1da177e4 LT |
1337 | .owner = THIS_MODULE, |
1338 | .open = ibmveth_proc_open, | |
1339 | .read = seq_read, | |
1340 | .llseek = seq_lseek, | |
1341 | .release = seq_release, | |
1342 | }; | |
1343 | ||
1344 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1345 | { | |
1346 | struct proc_dir_entry *entry; | |
1347 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1348 | char u_addr[10]; |
1349 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1350 | entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir); | |
1da177e4 LT |
1351 | if (!entry) { |
1352 | ibmveth_error_printk("Cannot create adapter proc entry"); | |
1353 | } else { | |
1354 | entry->data = (void *) adapter; | |
1355 | entry->proc_fops = &ibmveth_proc_fops; | |
1da177e4 LT |
1356 | } |
1357 | } | |
1358 | return; | |
1359 | } | |
1360 | ||
1361 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1362 | { | |
1363 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1364 | char u_addr[10]; |
1365 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1366 | remove_proc_entry(u_addr, ibmveth_proc_dir); | |
1da177e4 LT |
1367 | } |
1368 | } | |
1369 | ||
1370 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1371 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1372 | { |
1373 | } | |
1374 | ||
d7fbeba6 | 1375 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1376 | { |
1377 | } | |
1378 | static void ibmveth_proc_register_driver(void) | |
1379 | { | |
1380 | } | |
1381 | ||
1382 | static void ibmveth_proc_unregister_driver(void) | |
1383 | { | |
1384 | } | |
1385 | #endif /* CONFIG_PROC_FS */ | |
1386 | ||
860f242e SL |
1387 | static struct attribute veth_active_attr; |
1388 | static struct attribute veth_num_attr; | |
1389 | static struct attribute veth_size_attr; | |
1390 | ||
1391 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1392 | struct attribute * attr, char * buf) | |
1393 | { | |
d7fbeba6 | 1394 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1395 | struct ibmveth_buff_pool, |
1396 | kobj); | |
1397 | ||
1398 | if (attr == &veth_active_attr) | |
1399 | return sprintf(buf, "%d\n", pool->active); | |
1400 | else if (attr == &veth_num_attr) | |
1401 | return sprintf(buf, "%d\n", pool->size); | |
1402 | else if (attr == &veth_size_attr) | |
1403 | return sprintf(buf, "%d\n", pool->buff_size); | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1408 | const char * buf, size_t count) | |
1409 | { | |
d7fbeba6 | 1410 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1411 | struct ibmveth_buff_pool, |
1412 | kobj); | |
d7fbeba6 | 1413 | struct net_device *netdev = |
860f242e SL |
1414 | container_of(kobj->parent, struct device, kobj)->driver_data; |
1415 | struct ibmveth_adapter *adapter = netdev->priv; | |
1416 | long value = simple_strtol(buf, NULL, 10); | |
1417 | long rc; | |
1418 | ||
1419 | if (attr == &veth_active_attr) { | |
1420 | if (value && !pool->active) { | |
4aa9c93e BK |
1421 | if (netif_running(netdev)) { |
1422 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1423 | ibmveth_error_printk("unable to alloc pool\n"); | |
1424 | return -ENOMEM; | |
1425 | } | |
1426 | pool->active = 1; | |
1427 | adapter->pool_config = 1; | |
1428 | ibmveth_close(netdev); | |
1429 | adapter->pool_config = 0; | |
1430 | if ((rc = ibmveth_open(netdev))) | |
1431 | return rc; | |
1432 | } else | |
1433 | pool->active = 1; | |
860f242e SL |
1434 | } else if (!value && pool->active) { |
1435 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1436 | int i; | |
1437 | /* Make sure there is a buffer pool with buffers that | |
1438 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1439 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1440 | if (pool == &adapter->rx_buff_pool[i]) |
1441 | continue; | |
1442 | if (!adapter->rx_buff_pool[i].active) | |
1443 | continue; | |
76b9cfcc BK |
1444 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1445 | break; | |
860f242e | 1446 | } |
76b9cfcc BK |
1447 | |
1448 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1449 | ibmveth_error_printk("no active pool >= MTU\n"); |
1450 | return -EPERM; | |
1451 | } | |
76b9cfcc BK |
1452 | |
1453 | pool->active = 0; | |
1454 | if (netif_running(netdev)) { | |
1455 | adapter->pool_config = 1; | |
1456 | ibmveth_close(netdev); | |
1457 | adapter->pool_config = 0; | |
1458 | if ((rc = ibmveth_open(netdev))) | |
1459 | return rc; | |
1460 | } | |
860f242e SL |
1461 | } |
1462 | } else if (attr == &veth_num_attr) { | |
1463 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1464 | return -EINVAL; | |
1465 | else { | |
4aa9c93e BK |
1466 | if (netif_running(netdev)) { |
1467 | adapter->pool_config = 1; | |
1468 | ibmveth_close(netdev); | |
1469 | adapter->pool_config = 0; | |
1470 | pool->size = value; | |
1471 | if ((rc = ibmveth_open(netdev))) | |
1472 | return rc; | |
1473 | } else | |
1474 | pool->size = value; | |
860f242e SL |
1475 | } |
1476 | } else if (attr == &veth_size_attr) { | |
1477 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1478 | return -EINVAL; | |
1479 | else { | |
4aa9c93e BK |
1480 | if (netif_running(netdev)) { |
1481 | adapter->pool_config = 1; | |
1482 | ibmveth_close(netdev); | |
1483 | adapter->pool_config = 0; | |
1484 | pool->buff_size = value; | |
1485 | if ((rc = ibmveth_open(netdev))) | |
1486 | return rc; | |
1487 | } else | |
1488 | pool->buff_size = value; | |
860f242e SL |
1489 | } |
1490 | } | |
1491 | ||
1492 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1493 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1494 | return count; |
1495 | } | |
1496 | ||
1497 | ||
1498 | #define ATTR(_name, _mode) \ | |
1499 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1500 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1501 | }; |
1502 | ||
1503 | static ATTR(active, 0644); | |
1504 | static ATTR(num, 0644); | |
1505 | static ATTR(size, 0644); | |
1506 | ||
1507 | static struct attribute * veth_pool_attrs[] = { | |
1508 | &veth_active_attr, | |
1509 | &veth_num_attr, | |
1510 | &veth_size_attr, | |
1511 | NULL, | |
1512 | }; | |
1513 | ||
1514 | static struct sysfs_ops veth_pool_ops = { | |
1515 | .show = veth_pool_show, | |
1516 | .store = veth_pool_store, | |
1517 | }; | |
1518 | ||
1519 | static struct kobj_type ktype_veth_pool = { | |
1520 | .release = NULL, | |
1521 | .sysfs_ops = &veth_pool_ops, | |
1522 | .default_attrs = veth_pool_attrs, | |
1523 | }; | |
1524 | ||
1525 | ||
1da177e4 LT |
1526 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1527 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1528 | { "", "" } |
1da177e4 | 1529 | }; |
1da177e4 LT |
1530 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1531 | ||
1532 | static struct vio_driver ibmveth_driver = { | |
6fdf5392 SR |
1533 | .id_table = ibmveth_device_table, |
1534 | .probe = ibmveth_probe, | |
1535 | .remove = ibmveth_remove, | |
1536 | .driver = { | |
1537 | .name = ibmveth_driver_name, | |
915124d8 | 1538 | .owner = THIS_MODULE, |
6fdf5392 | 1539 | } |
1da177e4 LT |
1540 | }; |
1541 | ||
1542 | static int __init ibmveth_module_init(void) | |
1543 | { | |
1544 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1545 | ||
1546 | ibmveth_proc_register_driver(); | |
1547 | ||
1548 | return vio_register_driver(&ibmveth_driver); | |
1549 | } | |
1550 | ||
1551 | static void __exit ibmveth_module_exit(void) | |
1552 | { | |
1553 | vio_unregister_driver(&ibmveth_driver); | |
1554 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1555 | } |
1da177e4 LT |
1556 | |
1557 | module_init(ibmveth_module_init); | |
1558 | module_exit(ibmveth_module_exit); |