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 | 28 | /**************************************************************************/ |
1da177e4 | 29 | |
1da177e4 | 30 | #include <linux/module.h> |
1096d63d | 31 | #include <linux/moduleparam.h> |
1da177e4 LT |
32 | #include <linux/types.h> |
33 | #include <linux/errno.h> | |
34 | #include <linux/ioport.h> | |
35 | #include <linux/dma-mapping.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/etherdevice.h> | |
39 | #include <linux/skbuff.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/mm.h> | |
e7a3af5d | 43 | #include <linux/pm.h> |
1da177e4 | 44 | #include <linux/ethtool.h> |
f4ff2872 BK |
45 | #include <linux/in.h> |
46 | #include <linux/ip.h> | |
ab78df75 | 47 | #include <linux/ipv6.h> |
5a0e3ad6 | 48 | #include <linux/slab.h> |
1da177e4 LT |
49 | #include <asm/hvcall.h> |
50 | #include <asm/atomic.h> | |
1da177e4 | 51 | #include <asm/vio.h> |
1096d63d | 52 | #include <asm/iommu.h> |
1da177e4 | 53 | #include <asm/uaccess.h> |
1096d63d | 54 | #include <asm/firmware.h> |
1da177e4 LT |
55 | |
56 | #include "ibmveth.h" | |
57 | ||
6af37fa9 | 58 | #undef DEBUG |
1da177e4 | 59 | |
1da177e4 | 60 | #ifdef DEBUG |
1da177e4 LT |
61 | #define ibmveth_assert(expr) \ |
62 | if(!(expr)) { \ | |
63 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
64 | BUG(); \ | |
65 | } | |
66 | #else | |
d7fbeba6 | 67 | #define ibmveth_assert(expr) |
1da177e4 LT |
68 | #endif |
69 | ||
7d12e780 | 70 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 71 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 72 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
e295fe83 | 73 | |
860f242e | 74 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 75 | |
1096d63d | 76 | |
1da177e4 LT |
77 | static const char ibmveth_driver_name[] = "ibmveth"; |
78 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
79 | #define ibmveth_driver_version "1.03" | |
80 | ||
81 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
82 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
83 | MODULE_LICENSE("GPL"); | |
84 | MODULE_VERSION(ibmveth_driver_version); | |
85 | ||
c08cc3cc SL |
86 | static unsigned int tx_copybreak __read_mostly = 128; |
87 | module_param(tx_copybreak, uint, 0644); | |
88 | MODULE_PARM_DESC(tx_copybreak, | |
89 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
90 | ||
8d86c61a SL |
91 | static unsigned int rx_copybreak __read_mostly = 128; |
92 | module_param(rx_copybreak, uint, 0644); | |
93 | MODULE_PARM_DESC(rx_copybreak, | |
94 | "Maximum size of packet that is copied to a new buffer on receive"); | |
95 | ||
0c26b677 SL |
96 | static unsigned int rx_flush __read_mostly = 0; |
97 | module_param(rx_flush, uint, 0644); | |
98 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
99 | ||
ddbb4de9 BK |
100 | struct ibmveth_stat { |
101 | char name[ETH_GSTRING_LEN]; | |
102 | int offset; | |
103 | }; | |
104 | ||
105 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
106 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
107 | ||
108 | struct ibmveth_stat ibmveth_stats[] = { | |
109 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
110 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
111 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
112 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
113 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
114 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
115 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
116 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
117 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
118 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
ddbb4de9 BK |
119 | }; |
120 | ||
1da177e4 | 121 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
122 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
123 | { | |
124 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
125 | } | |
126 | ||
127 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
128 | { | |
129 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; | |
130 | } | |
131 | ||
1da177e4 LT |
132 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
133 | { | |
79ef4a4d | 134 | return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); |
1da177e4 LT |
135 | } |
136 | ||
137 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
138 | { | |
79ef4a4d | 139 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); |
1da177e4 LT |
140 | } |
141 | ||
142 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
143 | { | |
79ef4a4d | 144 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); |
1da177e4 LT |
145 | } |
146 | ||
147 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
148 | { | |
149 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
150 | } | |
151 | ||
f4ff2872 BK |
152 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
153 | { | |
79ef4a4d | 154 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); |
f4ff2872 BK |
155 | } |
156 | ||
1da177e4 | 157 | /* setup the initial settings for a buffer pool */ |
860f242e | 158 | 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 |
159 | { |
160 | pool->size = pool_size; | |
161 | pool->index = pool_index; | |
162 | pool->buff_size = buff_size; | |
c033a6d1 | 163 | pool->threshold = pool_size * 7 / 8; |
860f242e | 164 | pool->active = pool_active; |
1da177e4 LT |
165 | } |
166 | ||
167 | /* allocate and setup an buffer pool - called during open */ | |
168 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
169 | { | |
170 | int i; | |
171 | ||
d7fbeba6 | 172 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
173 | |
174 | if(!pool->free_map) { | |
175 | return -1; | |
176 | } | |
177 | ||
d7fbeba6 | 178 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
179 | if(!pool->dma_addr) { |
180 | kfree(pool->free_map); | |
181 | pool->free_map = NULL; | |
182 | return -1; | |
183 | } | |
184 | ||
a05abcb5 | 185 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
186 | |
187 | if(!pool->skbuff) { | |
188 | kfree(pool->dma_addr); | |
189 | pool->dma_addr = NULL; | |
190 | ||
191 | kfree(pool->free_map); | |
192 | pool->free_map = NULL; | |
193 | return -1; | |
194 | } | |
195 | ||
1da177e4 LT |
196 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
197 | ||
198 | for(i = 0; i < pool->size; ++i) { | |
199 | pool->free_map[i] = i; | |
200 | } | |
201 | ||
202 | atomic_set(&pool->available, 0); | |
203 | pool->producer_index = 0; | |
204 | pool->consumer_index = 0; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
0c26b677 SL |
209 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
210 | { | |
211 | unsigned long offset; | |
212 | ||
213 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
214 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
215 | } | |
216 | ||
1da177e4 LT |
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; | |
1096d63d RJ |
225 | struct sk_buff *skb; |
226 | unsigned int free_index, index; | |
227 | u64 correlator; | |
228 | unsigned long lpar_rc; | |
229 | dma_addr_t dma_addr; | |
1da177e4 LT |
230 | |
231 | mb(); | |
232 | ||
233 | for(i = 0; i < count; ++i) { | |
1da177e4 | 234 | union ibmveth_buf_desc desc; |
1da177e4 | 235 | |
003212cc | 236 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 LT |
237 | |
238 | if(!skb) { | |
c43ced18 SL |
239 | netdev_dbg(adapter->netdev, |
240 | "replenish: unable to allocate skb\n"); | |
1da177e4 LT |
241 | adapter->replenish_no_mem++; |
242 | break; | |
243 | } | |
244 | ||
047a66d4 | 245 | free_index = pool->consumer_index; |
a613f581 SL |
246 | pool->consumer_index++; |
247 | if (pool->consumer_index >= pool->size) | |
248 | pool->consumer_index = 0; | |
1da177e4 | 249 | index = pool->free_map[free_index]; |
d7fbeba6 | 250 | |
1da177e4 LT |
251 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
252 | ibmveth_assert(pool->skbuff[index] == NULL); | |
253 | ||
254 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
255 | pool->buff_size, DMA_FROM_DEVICE); | |
256 | ||
c713e7cb | 257 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
258 | goto failure; |
259 | ||
1da177e4 LT |
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 | 269 | |
0c26b677 SL |
270 | if (rx_flush) { |
271 | unsigned int len = min(pool->buff_size, | |
272 | adapter->netdev->mtu + | |
273 | IBMVETH_BUFF_OH); | |
274 | ibmveth_flush_buffer(skb->data, len); | |
275 | } | |
1da177e4 | 276 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); |
d7fbeba6 | 277 | |
1096d63d RJ |
278 | if (lpar_rc != H_SUCCESS) |
279 | goto failure; | |
280 | else { | |
1da177e4 LT |
281 | buffers_added++; |
282 | adapter->replenish_add_buff_success++; | |
283 | } | |
284 | } | |
d7fbeba6 | 285 | |
1096d63d RJ |
286 | mb(); |
287 | atomic_add(buffers_added, &(pool->available)); | |
288 | return; | |
289 | ||
290 | failure: | |
291 | pool->free_map[free_index] = index; | |
292 | pool->skbuff[index] = NULL; | |
293 | if (pool->consumer_index == 0) | |
294 | pool->consumer_index = pool->size - 1; | |
295 | else | |
296 | pool->consumer_index--; | |
c713e7cb | 297 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
298 | dma_unmap_single(&adapter->vdev->dev, |
299 | pool->dma_addr[index], pool->buff_size, | |
300 | DMA_FROM_DEVICE); | |
301 | dev_kfree_skb_any(skb); | |
302 | adapter->replenish_add_buff_failure++; | |
303 | ||
1da177e4 LT |
304 | mb(); |
305 | atomic_add(buffers_added, &(pool->available)); | |
306 | } | |
307 | ||
e2adbcb4 | 308 | /* replenish routine */ |
d7fbeba6 | 309 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 310 | { |
b6d35182 SL |
311 | int i; |
312 | ||
1da177e4 LT |
313 | adapter->replenish_task_cycles++; |
314 | ||
c033a6d1 SL |
315 | for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) { |
316 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; | |
317 | ||
318 | if (pool->active && | |
319 | (atomic_read(&pool->available) < pool->threshold)) | |
320 | ibmveth_replenish_buffer_pool(adapter, pool); | |
321 | } | |
1da177e4 LT |
322 | |
323 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
324 | } |
325 | ||
326 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
327 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
328 | { | |
329 | int i; | |
330 | ||
b4558ea9 JJ |
331 | kfree(pool->free_map); |
332 | pool->free_map = NULL; | |
1da177e4 LT |
333 | |
334 | if(pool->skbuff && pool->dma_addr) { | |
335 | for(i = 0; i < pool->size; ++i) { | |
336 | struct sk_buff *skb = pool->skbuff[i]; | |
337 | if(skb) { | |
338 | dma_unmap_single(&adapter->vdev->dev, | |
339 | pool->dma_addr[i], | |
340 | pool->buff_size, | |
341 | DMA_FROM_DEVICE); | |
342 | dev_kfree_skb_any(skb); | |
343 | pool->skbuff[i] = NULL; | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
348 | if(pool->dma_addr) { | |
349 | kfree(pool->dma_addr); | |
350 | pool->dma_addr = NULL; | |
351 | } | |
352 | ||
353 | if(pool->skbuff) { | |
354 | kfree(pool->skbuff); | |
355 | pool->skbuff = NULL; | |
356 | } | |
357 | } | |
358 | ||
359 | /* remove a buffer from a pool */ | |
360 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
361 | { | |
362 | unsigned int pool = correlator >> 32; | |
363 | unsigned int index = correlator & 0xffffffffUL; | |
364 | unsigned int free_index; | |
365 | struct sk_buff *skb; | |
366 | ||
367 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
368 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
369 | ||
370 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
371 | ||
372 | ibmveth_assert(skb != NULL); | |
373 | ||
374 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
375 | ||
376 | dma_unmap_single(&adapter->vdev->dev, | |
377 | adapter->rx_buff_pool[pool].dma_addr[index], | |
378 | adapter->rx_buff_pool[pool].buff_size, | |
379 | DMA_FROM_DEVICE); | |
380 | ||
047a66d4 | 381 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
382 | adapter->rx_buff_pool[pool].producer_index++; |
383 | if (adapter->rx_buff_pool[pool].producer_index >= | |
384 | adapter->rx_buff_pool[pool].size) | |
385 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
386 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
387 | ||
388 | mb(); | |
389 | ||
390 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
391 | } | |
392 | ||
393 | /* get the current buffer on the rx queue */ | |
394 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
395 | { | |
396 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
397 | unsigned int pool = correlator >> 32; | |
398 | unsigned int index = correlator & 0xffffffffUL; | |
399 | ||
400 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
401 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
402 | ||
403 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
404 | } | |
405 | ||
406 | /* recycle the current buffer on the rx queue */ | |
407 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
408 | { | |
409 | u32 q_index = adapter->rx_queue.index; | |
410 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
411 | unsigned int pool = correlator >> 32; | |
412 | unsigned int index = correlator & 0xffffffffUL; | |
413 | union ibmveth_buf_desc desc; | |
414 | unsigned long lpar_rc; | |
415 | ||
416 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
417 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
418 | ||
b6d35182 SL |
419 | if(!adapter->rx_buff_pool[pool].active) { |
420 | ibmveth_rxq_harvest_buffer(adapter); | |
421 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
422 | return; | |
423 | } | |
424 | ||
79ef4a4d BK |
425 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
426 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
427 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
428 | ||
429 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 430 | |
706c8c93 | 431 | if(lpar_rc != H_SUCCESS) { |
c43ced18 SL |
432 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
433 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 LT |
434 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
435 | } | |
436 | ||
437 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
438 | adapter->rx_queue.index = 0; | |
439 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
440 | } | |
441 | } | |
442 | ||
493a684a | 443 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
444 | { |
445 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
446 | ||
447 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
448 | adapter->rx_queue.index = 0; | |
449 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
450 | } | |
451 | } | |
452 | ||
453 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
454 | { | |
b6d35182 | 455 | int i; |
8d8bb39b | 456 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 457 | |
1da177e4 | 458 | if(adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
459 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
460 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
461 | DMA_BIDIRECTIONAL); |
462 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
463 | } | |
464 | free_page((unsigned long)adapter->buffer_list_addr); | |
465 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 466 | } |
1da177e4 LT |
467 | |
468 | if(adapter->filter_list_addr != NULL) { | |
8d8bb39b FT |
469 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
470 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
471 | DMA_BIDIRECTIONAL); |
472 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
473 | } | |
474 | free_page((unsigned long)adapter->filter_list_addr); | |
475 | adapter->filter_list_addr = NULL; | |
476 | } | |
477 | ||
478 | if(adapter->rx_queue.queue_addr != NULL) { | |
8d8bb39b FT |
479 | if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) { |
480 | dma_unmap_single(dev, | |
1da177e4 LT |
481 | adapter->rx_queue.queue_dma, |
482 | adapter->rx_queue.queue_len, | |
483 | DMA_BIDIRECTIONAL); | |
484 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
485 | } | |
486 | kfree(adapter->rx_queue.queue_addr); | |
487 | adapter->rx_queue.queue_addr = NULL; | |
488 | } | |
489 | ||
b6d35182 | 490 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 491 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 492 | ibmveth_free_buffer_pool(adapter, |
860f242e | 493 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
494 | |
495 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 496 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
497 | dma_unmap_single(&adapter->vdev->dev, |
498 | adapter->bounce_buffer_dma, | |
499 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
500 | DMA_BIDIRECTIONAL); | |
501 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
502 | } | |
503 | kfree(adapter->bounce_buffer); | |
504 | adapter->bounce_buffer = NULL; | |
505 | } | |
1da177e4 LT |
506 | } |
507 | ||
bbedefcc ME |
508 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
509 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
510 | { | |
511 | int rc, try_again = 1; | |
512 | ||
513 | /* After a kexec the adapter will still be open, so our attempt to | |
514 | * open it will fail. So if we get a failure we free the adapter and | |
515 | * try again, but only once. */ | |
516 | retry: | |
517 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
518 | adapter->buffer_list_dma, rxq_desc.desc, | |
519 | adapter->filter_list_dma, mac_address); | |
520 | ||
521 | if (rc != H_SUCCESS && try_again) { | |
522 | do { | |
523 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
524 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
525 | ||
526 | try_again = 0; | |
527 | goto retry; | |
528 | } | |
529 | ||
530 | return rc; | |
531 | } | |
532 | ||
1da177e4 LT |
533 | static int ibmveth_open(struct net_device *netdev) |
534 | { | |
4cf1653a | 535 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 536 | u64 mac_address = 0; |
b6d35182 | 537 | int rxq_entries = 1; |
1da177e4 LT |
538 | unsigned long lpar_rc; |
539 | int rc; | |
540 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 541 | int i; |
8d8bb39b | 542 | struct device *dev; |
1da177e4 | 543 | |
c43ced18 | 544 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 545 | |
bea3348e SH |
546 | napi_enable(&adapter->napi); |
547 | ||
b6d35182 SL |
548 | for(i = 0; i<IbmVethNumBufferPools; i++) |
549 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 550 | |
1da177e4 LT |
551 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
552 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 553 | |
1da177e4 | 554 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
21c2dece SL |
555 | netdev_err(netdev, "unable to allocate filter or buffer list " |
556 | "pages\n"); | |
1da177e4 | 557 | ibmveth_cleanup(adapter); |
bea3348e | 558 | napi_disable(&adapter->napi); |
1da177e4 LT |
559 | return -ENOMEM; |
560 | } | |
561 | ||
562 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
563 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
564 | ||
565 | if(!adapter->rx_queue.queue_addr) { | |
21c2dece | 566 | netdev_err(netdev, "unable to allocate rx queue pages\n"); |
1da177e4 | 567 | ibmveth_cleanup(adapter); |
bea3348e | 568 | napi_disable(&adapter->napi); |
1da177e4 LT |
569 | return -ENOMEM; |
570 | } | |
571 | ||
8d8bb39b FT |
572 | dev = &adapter->vdev->dev; |
573 | ||
574 | adapter->buffer_list_dma = dma_map_single(dev, | |
1da177e4 | 575 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 576 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 577 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 578 | adapter->rx_queue.queue_dma = dma_map_single(dev, |
1da177e4 LT |
579 | adapter->rx_queue.queue_addr, |
580 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
581 | ||
8d8bb39b FT |
582 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
583 | (dma_mapping_error(dev, adapter->filter_list_dma)) || | |
584 | (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) { | |
21c2dece SL |
585 | netdev_err(netdev, "unable to map filter or buffer list " |
586 | "pages\n"); | |
1da177e4 | 587 | ibmveth_cleanup(adapter); |
bea3348e | 588 | napi_disable(&adapter->napi); |
1da177e4 LT |
589 | return -ENOMEM; |
590 | } | |
591 | ||
592 | adapter->rx_queue.index = 0; | |
593 | adapter->rx_queue.num_slots = rxq_entries; | |
594 | adapter->rx_queue.toggle = 1; | |
595 | ||
1da177e4 LT |
596 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
597 | mac_address = mac_address >> 16; | |
598 | ||
79ef4a4d | 599 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; |
1da177e4 LT |
600 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
601 | ||
c43ced18 SL |
602 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
603 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
604 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 605 | |
4347ef15 SL |
606 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
607 | ||
bbedefcc | 608 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 609 | |
706c8c93 | 610 | if(lpar_rc != H_SUCCESS) { |
21c2dece SL |
611 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
612 | lpar_rc); | |
613 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
614 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
615 | adapter->buffer_list_dma, |
616 | adapter->filter_list_dma, | |
617 | rxq_desc.desc, | |
618 | mac_address); | |
619 | ibmveth_cleanup(adapter); | |
bea3348e | 620 | napi_disable(&adapter->napi); |
d7fbeba6 | 621 | return -ENONET; |
1da177e4 LT |
622 | } |
623 | ||
860f242e SL |
624 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
625 | if(!adapter->rx_buff_pool[i].active) | |
626 | continue; | |
627 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 628 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e SL |
629 | adapter->rx_buff_pool[i].active = 0; |
630 | ibmveth_cleanup(adapter); | |
bea3348e | 631 | napi_disable(&adapter->napi); |
860f242e SL |
632 | return -ENOMEM ; |
633 | } | |
634 | } | |
635 | ||
c43ced18 | 636 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
a0607fd3 | 637 | if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { |
21c2dece SL |
638 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
639 | netdev->irq, rc); | |
1da177e4 LT |
640 | do { |
641 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 642 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
643 | |
644 | ibmveth_cleanup(adapter); | |
bea3348e | 645 | napi_disable(&adapter->napi); |
1da177e4 LT |
646 | return rc; |
647 | } | |
648 | ||
1096d63d RJ |
649 | adapter->bounce_buffer = |
650 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
651 | if (!adapter->bounce_buffer) { | |
21c2dece | 652 | netdev_err(netdev, "unable to allocate bounce buffer\n"); |
1096d63d RJ |
653 | ibmveth_cleanup(adapter); |
654 | napi_disable(&adapter->napi); | |
655 | return -ENOMEM; | |
656 | } | |
657 | adapter->bounce_buffer_dma = | |
658 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
659 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 660 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 661 | netdev_err(netdev, "unable to map bounce buffer\n"); |
1096d63d RJ |
662 | ibmveth_cleanup(adapter); |
663 | napi_disable(&adapter->napi); | |
664 | return -ENOMEM; | |
665 | } | |
666 | ||
c43ced18 | 667 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 668 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 669 | |
e2adbcb4 | 670 | netif_start_queue(netdev); |
1da177e4 | 671 | |
c43ced18 | 672 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
673 | |
674 | return 0; | |
675 | } | |
676 | ||
677 | static int ibmveth_close(struct net_device *netdev) | |
678 | { | |
4cf1653a | 679 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 680 | long lpar_rc; |
d7fbeba6 | 681 | |
c43ced18 | 682 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 683 | |
bea3348e SH |
684 | napi_disable(&adapter->napi); |
685 | ||
860f242e SL |
686 | if (!adapter->pool_config) |
687 | netif_stop_queue(netdev); | |
1da177e4 | 688 | |
ee2e6114 | 689 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 690 | |
1da177e4 LT |
691 | do { |
692 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 693 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 694 | |
706c8c93 | 695 | if(lpar_rc != H_SUCCESS) |
1da177e4 | 696 | { |
21c2dece SL |
697 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
698 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
699 | } |
700 | ||
ee2e6114 RJ |
701 | free_irq(netdev->irq, netdev); |
702 | ||
1da177e4 LT |
703 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); |
704 | ||
705 | ibmveth_cleanup(adapter); | |
706 | ||
c43ced18 | 707 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
708 | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
713 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
714 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
715 | cmd->speed = SPEED_1000; | |
716 | cmd->duplex = DUPLEX_FULL; | |
717 | cmd->port = PORT_FIBRE; | |
718 | cmd->phy_address = 0; | |
719 | cmd->transceiver = XCVR_INTERNAL; | |
720 | cmd->autoneg = AUTONEG_ENABLE; | |
721 | cmd->maxtxpkt = 0; | |
722 | cmd->maxrxpkt = 1; | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
727 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
728 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
729 | } | |
730 | ||
731 | static u32 netdev_get_link(struct net_device *dev) { | |
732 | return 1; | |
733 | } | |
734 | ||
5fc7e01c BK |
735 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
736 | { | |
4cf1653a | 737 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
738 | |
739 | if (data) | |
740 | adapter->rx_csum = 1; | |
741 | else { | |
742 | /* | |
743 | * Since the ibmveth firmware interface does not have the concept of | |
744 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
745 | * we also have to disable tx checksum offload. Once we disable rx | |
746 | * checksum offload, we are no longer allowed to send tx buffers that | |
747 | * are not properly checksummed. | |
748 | */ | |
749 | adapter->rx_csum = 0; | |
750 | dev->features &= ~NETIF_F_IP_CSUM; | |
ab78df75 | 751 | dev->features &= ~NETIF_F_IPV6_CSUM; |
5fc7e01c BK |
752 | } |
753 | } | |
754 | ||
755 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
756 | { | |
4cf1653a | 757 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
758 | |
759 | if (data) { | |
ab78df75 SL |
760 | if (adapter->fw_ipv4_csum_support) |
761 | dev->features |= NETIF_F_IP_CSUM; | |
762 | if (adapter->fw_ipv6_csum_support) | |
763 | dev->features |= NETIF_F_IPV6_CSUM; | |
5fc7e01c | 764 | adapter->rx_csum = 1; |
ab78df75 | 765 | } else { |
5fc7e01c | 766 | dev->features &= ~NETIF_F_IP_CSUM; |
ab78df75 SL |
767 | dev->features &= ~NETIF_F_IPV6_CSUM; |
768 | } | |
5fc7e01c BK |
769 | } |
770 | ||
771 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
772 | void (*done) (struct net_device *, u32)) | |
773 | { | |
4cf1653a | 774 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 775 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 SL |
776 | unsigned long set_attr6, clr_attr6; |
777 | long ret, ret6; | |
5fc7e01c BK |
778 | int rc1 = 0, rc2 = 0; |
779 | int restart = 0; | |
780 | ||
781 | if (netif_running(dev)) { | |
782 | restart = 1; | |
783 | adapter->pool_config = 1; | |
784 | ibmveth_close(dev); | |
785 | adapter->pool_config = 0; | |
786 | } | |
787 | ||
79ef4a4d BK |
788 | set_attr = 0; |
789 | clr_attr = 0; | |
5fc7e01c | 790 | |
ab78df75 | 791 | if (data) { |
79ef4a4d | 792 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
793 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
794 | } else { | |
79ef4a4d | 795 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
796 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
797 | } | |
5fc7e01c | 798 | |
79ef4a4d | 799 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 800 | |
79ef4a4d BK |
801 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
802 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
803 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
804 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
805 | set_attr, &ret_attr); | |
5fc7e01c BK |
806 | |
807 | if (ret != H_SUCCESS) { | |
21c2dece SL |
808 | netdev_err(dev, "unable to change IPv4 checksum " |
809 | "offload settings. %d rc=%ld\n", | |
810 | data, ret); | |
5fc7e01c BK |
811 | |
812 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
79ef4a4d | 813 | set_attr, clr_attr, &ret_attr); |
5fc7e01c | 814 | } else |
ab78df75 SL |
815 | adapter->fw_ipv4_csum_support = data; |
816 | ||
817 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
818 | clr_attr6, set_attr6, &ret_attr); | |
819 | ||
820 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
821 | netdev_err(dev, "unable to change IPv6 checksum " |
822 | "offload settings. %d rc=%ld\n", | |
823 | data, ret); | |
ab78df75 SL |
824 | |
825 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
826 | set_attr6, clr_attr6, | |
827 | &ret_attr); | |
828 | } else | |
829 | adapter->fw_ipv6_csum_support = data; | |
830 | ||
831 | if (ret == H_SUCCESS || ret6 == H_SUCCESS) | |
5fc7e01c | 832 | done(dev, data); |
ab78df75 SL |
833 | else |
834 | rc1 = -EIO; | |
5fc7e01c BK |
835 | } else { |
836 | rc1 = -EIO; | |
21c2dece SL |
837 | netdev_err(dev, "unable to change checksum offload settings." |
838 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
839 | ret_attr); | |
5fc7e01c BK |
840 | } |
841 | ||
842 | if (restart) | |
843 | rc2 = ibmveth_open(dev); | |
844 | ||
845 | return rc1 ? rc1 : rc2; | |
846 | } | |
847 | ||
848 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
849 | { | |
4cf1653a | 850 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
851 | |
852 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
853 | return 0; | |
854 | ||
855 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
856 | } | |
857 | ||
858 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
859 | { | |
4cf1653a | 860 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
861 | int rc = 0; |
862 | ||
ab78df75 | 863 | if (data && (dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
5fc7e01c | 864 | return 0; |
ab78df75 | 865 | if (!data && !(dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
5fc7e01c BK |
866 | return 0; |
867 | ||
868 | if (data && !adapter->rx_csum) | |
869 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
870 | else | |
871 | ibmveth_set_tx_csum_flags(dev, data); | |
872 | ||
873 | return rc; | |
874 | } | |
875 | ||
876 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
877 | { | |
4cf1653a | 878 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
879 | return adapter->rx_csum; |
880 | } | |
881 | ||
ddbb4de9 BK |
882 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
883 | { | |
884 | int i; | |
885 | ||
886 | if (stringset != ETH_SS_STATS) | |
887 | return; | |
888 | ||
889 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
890 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
891 | } | |
892 | ||
b9f2c044 | 893 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 894 | { |
b9f2c044 JG |
895 | switch (sset) { |
896 | case ETH_SS_STATS: | |
897 | return ARRAY_SIZE(ibmveth_stats); | |
898 | default: | |
899 | return -EOPNOTSUPP; | |
900 | } | |
ddbb4de9 BK |
901 | } |
902 | ||
903 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
904 | struct ethtool_stats *stats, u64 *data) | |
905 | { | |
906 | int i; | |
4cf1653a | 907 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
908 | |
909 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
910 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
911 | } | |
912 | ||
7282d491 | 913 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
914 | .get_drvinfo = netdev_get_drvinfo, |
915 | .get_settings = netdev_get_settings, | |
916 | .get_link = netdev_get_link, | |
5fc7e01c BK |
917 | .set_tx_csum = ibmveth_set_tx_csum, |
918 | .get_rx_csum = ibmveth_get_rx_csum, | |
919 | .set_rx_csum = ibmveth_set_rx_csum, | |
ddbb4de9 | 920 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 921 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 922 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
6e8ab30e | 923 | .set_sg = ethtool_op_set_sg, |
1da177e4 LT |
924 | }; |
925 | ||
926 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
927 | { | |
928 | return -EOPNOTSUPP; | |
929 | } | |
930 | ||
931 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
932 | ||
6e8ab30e SL |
933 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
934 | union ibmveth_buf_desc *descs) | |
1da177e4 | 935 | { |
1da177e4 LT |
936 | unsigned long correlator; |
937 | unsigned int retry_count; | |
6e8ab30e SL |
938 | unsigned long ret; |
939 | ||
940 | /* | |
941 | * The retry count sets a maximum for the number of broadcast and | |
942 | * multicast destinations within the system. | |
943 | */ | |
944 | retry_count = 1024; | |
945 | correlator = 0; | |
946 | do { | |
947 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
948 | descs[0].desc, descs[1].desc, | |
949 | descs[2].desc, descs[3].desc, | |
950 | descs[4].desc, descs[5].desc, | |
951 | correlator, &correlator); | |
952 | } while ((ret == H_BUSY) && (retry_count--)); | |
953 | ||
954 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
955 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
956 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
957 | return 1; |
958 | } | |
959 | ||
960 | return 0; | |
961 | } | |
60296d9e | 962 | |
6e8ab30e SL |
963 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
964 | struct net_device *netdev) | |
965 | { | |
966 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
967 | unsigned int desc_flags; | |
968 | union ibmveth_buf_desc descs[6]; | |
969 | int last, i; | |
970 | int force_bounce = 0; | |
971 | ||
972 | /* | |
973 | * veth handles a maximum of 6 segments including the header, so | |
974 | * we have to linearize the skb if there are more than this. | |
975 | */ | |
976 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
977 | netdev->stats.tx_dropped++; | |
978 | goto out; | |
979 | } | |
1da177e4 | 980 | |
6e8ab30e | 981 | /* veth can't checksum offload UDP */ |
f4ff2872 | 982 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
983 | ((skb->protocol == htons(ETH_P_IP) && |
984 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
985 | (skb->protocol == htons(ETH_P_IPV6) && | |
986 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
987 | skb_checksum_help(skb)) { | |
988 | ||
21c2dece | 989 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 990 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
991 | goto out; |
992 | } | |
993 | ||
6e8ab30e SL |
994 | desc_flags = IBMVETH_BUF_VALID; |
995 | ||
f4ff2872 | 996 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
997 | unsigned char *buf = skb_transport_header(skb) + |
998 | skb->csum_offset; | |
f4ff2872 | 999 | |
6e8ab30e | 1000 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
1001 | |
1002 | /* Need to zero out the checksum */ | |
1003 | buf[0] = 0; | |
1004 | buf[1] = 0; | |
1005 | } | |
1006 | ||
6e8ab30e SL |
1007 | retry_bounce: |
1008 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 1009 | |
6e8ab30e SL |
1010 | /* |
1011 | * If a linear packet is below the rx threshold then | |
1012 | * copy it into the static bounce buffer. This avoids the | |
1013 | * cost of a TCE insert and remove. | |
1014 | */ | |
1015 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
1016 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
1017 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
1018 | skb->len); | |
1da177e4 | 1019 | |
6e8ab30e SL |
1020 | descs[0].fields.flags_len = desc_flags | skb->len; |
1021 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
1022 | ||
1023 | if (ibmveth_send(adapter, descs)) { | |
1024 | adapter->tx_send_failed++; | |
1025 | netdev->stats.tx_dropped++; | |
1026 | } else { | |
1027 | netdev->stats.tx_packets++; | |
1028 | netdev->stats.tx_bytes += skb->len; | |
1029 | } | |
1030 | ||
1031 | goto out; | |
1032 | } | |
1033 | ||
1034 | /* Map the header */ | |
1035 | descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
1036 | skb_headlen(skb), | |
1037 | DMA_TO_DEVICE); | |
1038 | if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address)) | |
1039 | goto map_failed; | |
1040 | ||
1041 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
1042 | ||
1043 | /* Map the frags */ | |
1044 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1045 | unsigned long dma_addr; | |
1046 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1047 | ||
1048 | dma_addr = dma_map_page(&adapter->vdev->dev, frag->page, | |
1049 | frag->page_offset, frag->size, | |
1050 | DMA_TO_DEVICE); | |
1051 | ||
1052 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1053 | goto map_failed_frags; | |
1054 | ||
1055 | descs[i+1].fields.flags_len = desc_flags | frag->size; | |
1056 | descs[i+1].fields.address = dma_addr; | |
1057 | } | |
1058 | ||
1059 | if (ibmveth_send(adapter, descs)) { | |
1060 | adapter->tx_send_failed++; | |
1061 | netdev->stats.tx_dropped++; | |
1da177e4 | 1062 | } else { |
6e8ab30e SL |
1063 | netdev->stats.tx_packets++; |
1064 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1065 | } |
1066 | ||
6e8ab30e SL |
1067 | for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) |
1068 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1069 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1070 | DMA_TO_DEVICE); | |
1da177e4 | 1071 | |
e8cb7eb4 | 1072 | out: |
1da177e4 | 1073 | dev_kfree_skb(skb); |
6ed10654 | 1074 | return NETDEV_TX_OK; |
6e8ab30e SL |
1075 | |
1076 | map_failed_frags: | |
1077 | last = i+1; | |
1078 | for (i = 0; i < last; i++) | |
1079 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1080 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1081 | DMA_TO_DEVICE); | |
1082 | ||
1083 | map_failed: | |
1084 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1085 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e SL |
1086 | adapter->tx_map_failed++; |
1087 | skb_linearize(skb); | |
1088 | force_bounce = 1; | |
1089 | goto retry_bounce; | |
1da177e4 LT |
1090 | } |
1091 | ||
bea3348e | 1092 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1093 | { |
bea3348e SH |
1094 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
1095 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 1096 | int frames_processed = 0; |
1da177e4 LT |
1097 | unsigned long lpar_rc; |
1098 | ||
1099 | restart_poll: | |
1100 | do { | |
bea3348e SH |
1101 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1102 | break; | |
1da177e4 | 1103 | |
f89e49e7 | 1104 | smp_rmb(); |
bea3348e SH |
1105 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1106 | wmb(); /* suggested by larson1 */ | |
1107 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1108 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1109 | ibmveth_rxq_recycle_buffer(adapter); |
1110 | } else { | |
8d86c61a | 1111 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1112 | int length = ibmveth_rxq_frame_length(adapter); |
1113 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1114 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1115 | ||
bea3348e | 1116 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1117 | |
8d86c61a SL |
1118 | new_skb = NULL; |
1119 | if (length < rx_copybreak) | |
1120 | new_skb = netdev_alloc_skb(netdev, length); | |
1121 | ||
1122 | if (new_skb) { | |
1123 | skb_copy_to_linear_data(new_skb, | |
1124 | skb->data + offset, | |
1125 | length); | |
0c26b677 SL |
1126 | if (rx_flush) |
1127 | ibmveth_flush_buffer(skb->data, | |
1128 | length + offset); | |
8d86c61a SL |
1129 | skb = new_skb; |
1130 | ibmveth_rxq_recycle_buffer(adapter); | |
1131 | } else { | |
1132 | ibmveth_rxq_harvest_buffer(adapter); | |
1133 | skb_reserve(skb, offset); | |
1134 | } | |
1da177e4 | 1135 | |
bea3348e SH |
1136 | skb_put(skb, length); |
1137 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1138 | |
8d86c61a SL |
1139 | if (csum_good) |
1140 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1141 | ||
bea3348e | 1142 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1143 | |
09f75cd7 JG |
1144 | netdev->stats.rx_packets++; |
1145 | netdev->stats.rx_bytes += length; | |
bea3348e | 1146 | frames_processed++; |
1da177e4 | 1147 | } |
bea3348e | 1148 | } while (frames_processed < budget); |
1da177e4 | 1149 | |
e2adbcb4 | 1150 | ibmveth_replenish_task(adapter); |
1da177e4 | 1151 | |
bea3348e SH |
1152 | if (frames_processed < budget) { |
1153 | /* We think we are done - reenable interrupts, | |
1154 | * then check once more to make sure we are done. | |
1155 | */ | |
1156 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1157 | VIO_IRQ_ENABLE); | |
1da177e4 | 1158 | |
bea3348e | 1159 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 1160 | |
288379f0 | 1161 | napi_complete(napi); |
1da177e4 | 1162 | |
bea3348e | 1163 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1164 | napi_reschedule(napi)) { |
bea3348e SH |
1165 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1166 | VIO_IRQ_DISABLE); | |
1167 | goto restart_poll; | |
1168 | } | |
1da177e4 LT |
1169 | } |
1170 | ||
bea3348e | 1171 | return frames_processed; |
1da177e4 LT |
1172 | } |
1173 | ||
7d12e780 | 1174 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1175 | { |
1da177e4 | 1176 | struct net_device *netdev = dev_instance; |
4cf1653a | 1177 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1178 | unsigned long lpar_rc; |
1179 | ||
288379f0 | 1180 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1181 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1182 | VIO_IRQ_DISABLE); | |
706c8c93 | 1183 | ibmveth_assert(lpar_rc == H_SUCCESS); |
288379f0 | 1184 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1185 | } |
1186 | return IRQ_HANDLED; | |
1187 | } | |
1188 | ||
1da177e4 LT |
1189 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1190 | { | |
4cf1653a | 1191 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1192 | unsigned long lpar_rc; |
1193 | ||
4cd24eaf JP |
1194 | if ((netdev->flags & IFF_PROMISC) || |
1195 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1196 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1197 | IbmVethMcastEnableRecv | | |
1198 | IbmVethMcastDisableFiltering, | |
1199 | 0); | |
706c8c93 | 1200 | if(lpar_rc != H_SUCCESS) { |
21c2dece SL |
1201 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1202 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1203 | } |
1204 | } else { | |
22bedad3 | 1205 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1206 | /* clear the filter table & disable filtering */ |
1207 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1208 | IbmVethMcastEnableRecv | | |
1209 | IbmVethMcastDisableFiltering | | |
1210 | IbmVethMcastClearFilterTable, | |
1211 | 0); | |
706c8c93 | 1212 | if(lpar_rc != H_SUCCESS) { |
21c2dece SL |
1213 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1214 | "attempting to clear filter table\n", | |
1215 | lpar_rc); | |
1da177e4 LT |
1216 | } |
1217 | /* add the addresses to the filter table */ | |
22bedad3 | 1218 | netdev_for_each_mc_addr(ha, netdev) { |
1da177e4 LT |
1219 | // add the multicast address to the filter table |
1220 | unsigned long mcast_addr = 0; | |
22bedad3 | 1221 | memcpy(((char *)&mcast_addr)+2, ha->addr, 6); |
1da177e4 LT |
1222 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1223 | IbmVethMcastAddFilter, | |
1224 | mcast_addr); | |
706c8c93 | 1225 | if(lpar_rc != H_SUCCESS) { |
21c2dece SL |
1226 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1227 | "when adding an entry to the filter " | |
1228 | "table\n", lpar_rc); | |
1da177e4 LT |
1229 | } |
1230 | } | |
d7fbeba6 | 1231 | |
1da177e4 LT |
1232 | /* re-enable filtering */ |
1233 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1234 | IbmVethMcastEnableFiltering, | |
1235 | 0); | |
706c8c93 | 1236 | if(lpar_rc != H_SUCCESS) { |
21c2dece SL |
1237 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1238 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1239 | } |
1240 | } | |
1241 | } | |
1242 | ||
1243 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1244 | { | |
4cf1653a | 1245 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1246 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1247 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1248 | int i, rc; |
1249 | int need_restart = 0; | |
b6d35182 | 1250 | |
860f242e | 1251 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1252 | return -EINVAL; |
b6d35182 | 1253 | |
ce6eea58 BK |
1254 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1255 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1256 | break; | |
1257 | ||
1258 | if (i == IbmVethNumBufferPools) | |
1259 | return -EINVAL; | |
1260 | ||
ea866e65 SL |
1261 | /* Deactivate all the buffer pools so that the next loop can activate |
1262 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1263 | if (netif_running(adapter->netdev)) { |
1264 | need_restart = 1; | |
1265 | adapter->pool_config = 1; | |
1266 | ibmveth_close(adapter->netdev); | |
1267 | adapter->pool_config = 0; | |
1268 | } | |
ea866e65 | 1269 | |
860f242e | 1270 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1271 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ea866e65 | 1272 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1273 | |
860f242e | 1274 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1275 | dev->mtu = new_mtu; |
1276 | vio_cmo_set_dev_desired(viodev, | |
1277 | ibmveth_get_desired_dma | |
1278 | (viodev)); | |
0645bab7 RJ |
1279 | if (need_restart) { |
1280 | return ibmveth_open(adapter->netdev); | |
1281 | } | |
860f242e | 1282 | return 0; |
b6d35182 | 1283 | } |
b6d35182 | 1284 | } |
0645bab7 RJ |
1285 | |
1286 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1287 | return rc; | |
1288 | ||
860f242e | 1289 | return -EINVAL; |
1da177e4 LT |
1290 | } |
1291 | ||
6b422374 SL |
1292 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1293 | static void ibmveth_poll_controller(struct net_device *dev) | |
1294 | { | |
4cf1653a | 1295 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1296 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1297 | } |
1298 | #endif | |
1299 | ||
1096d63d RJ |
1300 | /** |
1301 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1302 | * | |
1303 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1304 | * | |
1305 | * Return value: | |
1306 | * Number of bytes of IO data the driver will need to perform well. | |
1307 | */ | |
1308 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1309 | { | |
1310 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1311 | struct ibmveth_adapter *adapter; | |
1312 | unsigned long ret; | |
1313 | int i; | |
1314 | int rxqentries = 1; | |
1315 | ||
1316 | /* netdev inits at probe time along with the structures we need below*/ | |
1317 | if (netdev == NULL) | |
1318 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1319 | ||
1320 | adapter = netdev_priv(netdev); | |
1321 | ||
1322 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1323 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1324 | ||
1325 | for (i = 0; i < IbmVethNumBufferPools; i++) { | |
1326 | /* add the size of the active receive buffers */ | |
1327 | if (adapter->rx_buff_pool[i].active) | |
1328 | ret += | |
1329 | adapter->rx_buff_pool[i].size * | |
1330 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1331 | buff_size); | |
1332 | rxqentries += adapter->rx_buff_pool[i].size; | |
1333 | } | |
1334 | /* add the size of the receive queue entries */ | |
1335 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1336 | ||
1337 | return ret; | |
1338 | } | |
1339 | ||
e186d174 AB |
1340 | static const struct net_device_ops ibmveth_netdev_ops = { |
1341 | .ndo_open = ibmveth_open, | |
1342 | .ndo_stop = ibmveth_close, | |
1343 | .ndo_start_xmit = ibmveth_start_xmit, | |
1344 | .ndo_set_multicast_list = ibmveth_set_multicast_list, | |
1345 | .ndo_do_ioctl = ibmveth_ioctl, | |
1346 | .ndo_change_mtu = ibmveth_change_mtu, | |
1347 | .ndo_validate_addr = eth_validate_addr, | |
1348 | .ndo_set_mac_address = eth_mac_addr, | |
1349 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1350 | .ndo_poll_controller = ibmveth_poll_controller, | |
1351 | #endif | |
1352 | }; | |
1353 | ||
1da177e4 LT |
1354 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1355 | { | |
b6d35182 | 1356 | int rc, i; |
1da177e4 | 1357 | struct net_device *netdev; |
9dc83afd | 1358 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1359 | |
1360 | unsigned char *mac_addr_p; | |
1361 | unsigned int *mcastFilterSize_p; | |
1362 | ||
1363 | ||
c43ced18 SL |
1364 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1365 | dev->unit_address); | |
1da177e4 | 1366 | |
493a684a ME |
1367 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1368 | VETH_MAC_ADDR, NULL); | |
1da177e4 | 1369 | if(!mac_addr_p) { |
21c2dece | 1370 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
1da177e4 LT |
1371 | return 0; |
1372 | } | |
d7fbeba6 | 1373 | |
493a684a ME |
1374 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1375 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 | 1376 | if(!mcastFilterSize_p) { |
21c2dece SL |
1377 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1378 | "attribute\n"); | |
1da177e4 LT |
1379 | return 0; |
1380 | } | |
d7fbeba6 | 1381 | |
1da177e4 LT |
1382 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1383 | ||
1384 | if(!netdev) | |
1385 | return -ENOMEM; | |
1386 | ||
4cf1653a | 1387 | adapter = netdev_priv(netdev); |
c7ae011d | 1388 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1389 | |
1390 | adapter->vdev = dev; | |
1391 | adapter->netdev = netdev; | |
1392 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1393 | adapter->pool_config = 0; |
d7fbeba6 | 1394 | |
bea3348e SH |
1395 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1396 | ||
1da177e4 | 1397 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1398 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1399 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1400 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1401 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1402 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1403 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1404 | ||
1405 | if ((*mac_addr_p & 0x3) != 0x02) | |
1406 | mac_addr_p += 2; | |
1407 | ||
1408 | adapter->mac_addr = 0; | |
1409 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1410 | ||
1da177e4 | 1411 | netdev->irq = dev->irq; |
e186d174 AB |
1412 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1413 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1414 | SET_NETDEV_DEV(netdev, &dev->dev); |
6e8ab30e | 1415 | netdev->features |= NETIF_F_SG; |
1da177e4 | 1416 | |
d44b5e07 | 1417 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1418 | |
860f242e SL |
1419 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1420 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
8dde2a96 GKH |
1421 | int error; |
1422 | ||
d7fbeba6 JG |
1423 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1424 | pool_count[i], pool_size[i], | |
860f242e | 1425 | pool_active[i]); |
8dde2a96 GKH |
1426 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1427 | &dev->dev.kobj, "pool%d", i); | |
1428 | if (!error) | |
1429 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1430 | } |
1da177e4 | 1431 | |
c43ced18 | 1432 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1433 | |
1da177e4 LT |
1434 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1435 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1436 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1437 | ||
c43ced18 | 1438 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1439 | |
bc4c6f54 | 1440 | ibmveth_set_csum_offload(netdev, 1, ibmveth_set_tx_csum_flags); |
f4ff2872 | 1441 | |
1da177e4 LT |
1442 | rc = register_netdev(netdev); |
1443 | ||
1444 | if(rc) { | |
c43ced18 | 1445 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1446 | free_netdev(netdev); |
1447 | return rc; | |
1448 | } | |
1449 | ||
c43ced18 | 1450 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1451 | |
1da177e4 LT |
1452 | return 0; |
1453 | } | |
1454 | ||
1455 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1456 | { | |
c7ae011d | 1457 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1458 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1459 | int i; |
1460 | ||
1461 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
c10997f6 | 1462 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1463 | |
1464 | unregister_netdev(netdev); | |
1465 | ||
1da177e4 | 1466 | free_netdev(netdev); |
1096d63d RJ |
1467 | dev_set_drvdata(&dev->dev, NULL); |
1468 | ||
1da177e4 LT |
1469 | return 0; |
1470 | } | |
1471 | ||
860f242e SL |
1472 | static struct attribute veth_active_attr; |
1473 | static struct attribute veth_num_attr; | |
1474 | static struct attribute veth_size_attr; | |
1475 | ||
1476 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1477 | struct attribute * attr, char * buf) | |
1478 | { | |
d7fbeba6 | 1479 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1480 | struct ibmveth_buff_pool, |
1481 | kobj); | |
1482 | ||
1483 | if (attr == &veth_active_attr) | |
1484 | return sprintf(buf, "%d\n", pool->active); | |
1485 | else if (attr == &veth_num_attr) | |
1486 | return sprintf(buf, "%d\n", pool->size); | |
1487 | else if (attr == &veth_size_attr) | |
1488 | return sprintf(buf, "%d\n", pool->buff_size); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1493 | const char * buf, size_t count) | |
1494 | { | |
d7fbeba6 | 1495 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1496 | struct ibmveth_buff_pool, |
1497 | kobj); | |
c7ae011d GKH |
1498 | struct net_device *netdev = dev_get_drvdata( |
1499 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1500 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1501 | long value = simple_strtol(buf, NULL, 10); |
1502 | long rc; | |
1503 | ||
1504 | if (attr == &veth_active_attr) { | |
1505 | if (value && !pool->active) { | |
4aa9c93e BK |
1506 | if (netif_running(netdev)) { |
1507 | if(ibmveth_alloc_buffer_pool(pool)) { | |
21c2dece SL |
1508 | netdev_err(netdev, |
1509 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1510 | return -ENOMEM; |
1511 | } | |
1512 | pool->active = 1; | |
1513 | adapter->pool_config = 1; | |
1514 | ibmveth_close(netdev); | |
1515 | adapter->pool_config = 0; | |
1516 | if ((rc = ibmveth_open(netdev))) | |
1517 | return rc; | |
1518 | } else | |
1519 | pool->active = 1; | |
860f242e SL |
1520 | } else if (!value && pool->active) { |
1521 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1522 | int i; | |
1523 | /* Make sure there is a buffer pool with buffers that | |
1524 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1525 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1526 | if (pool == &adapter->rx_buff_pool[i]) |
1527 | continue; | |
1528 | if (!adapter->rx_buff_pool[i].active) | |
1529 | continue; | |
76b9cfcc BK |
1530 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1531 | break; | |
860f242e | 1532 | } |
76b9cfcc BK |
1533 | |
1534 | if (i == IbmVethNumBufferPools) { | |
21c2dece | 1535 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1536 | return -EPERM; |
1537 | } | |
76b9cfcc | 1538 | |
76b9cfcc BK |
1539 | if (netif_running(netdev)) { |
1540 | adapter->pool_config = 1; | |
1541 | ibmveth_close(netdev); | |
ea866e65 | 1542 | pool->active = 0; |
76b9cfcc BK |
1543 | adapter->pool_config = 0; |
1544 | if ((rc = ibmveth_open(netdev))) | |
1545 | return rc; | |
1546 | } | |
ea866e65 | 1547 | pool->active = 0; |
860f242e SL |
1548 | } |
1549 | } else if (attr == &veth_num_attr) { | |
1550 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1551 | return -EINVAL; | |
1552 | else { | |
4aa9c93e BK |
1553 | if (netif_running(netdev)) { |
1554 | adapter->pool_config = 1; | |
1555 | ibmveth_close(netdev); | |
1556 | adapter->pool_config = 0; | |
1557 | pool->size = value; | |
1558 | if ((rc = ibmveth_open(netdev))) | |
1559 | return rc; | |
1560 | } else | |
1561 | pool->size = value; | |
860f242e SL |
1562 | } |
1563 | } else if (attr == &veth_size_attr) { | |
1564 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1565 | return -EINVAL; | |
1566 | else { | |
4aa9c93e BK |
1567 | if (netif_running(netdev)) { |
1568 | adapter->pool_config = 1; | |
1569 | ibmveth_close(netdev); | |
1570 | adapter->pool_config = 0; | |
1571 | pool->buff_size = value; | |
1572 | if ((rc = ibmveth_open(netdev))) | |
1573 | return rc; | |
1574 | } else | |
1575 | pool->buff_size = value; | |
860f242e SL |
1576 | } |
1577 | } | |
1578 | ||
1579 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1580 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1581 | return count; |
1582 | } | |
1583 | ||
1584 | ||
1585 | #define ATTR(_name, _mode) \ | |
1586 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1587 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1588 | }; |
1589 | ||
1590 | static ATTR(active, 0644); | |
1591 | static ATTR(num, 0644); | |
1592 | static ATTR(size, 0644); | |
1593 | ||
1594 | static struct attribute * veth_pool_attrs[] = { | |
1595 | &veth_active_attr, | |
1596 | &veth_num_attr, | |
1597 | &veth_size_attr, | |
1598 | NULL, | |
1599 | }; | |
1600 | ||
52cf25d0 | 1601 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1602 | .show = veth_pool_show, |
1603 | .store = veth_pool_store, | |
1604 | }; | |
1605 | ||
1606 | static struct kobj_type ktype_veth_pool = { | |
1607 | .release = NULL, | |
1608 | .sysfs_ops = &veth_pool_ops, | |
1609 | .default_attrs = veth_pool_attrs, | |
1610 | }; | |
1611 | ||
e7a3af5d BK |
1612 | static int ibmveth_resume(struct device *dev) |
1613 | { | |
1614 | struct net_device *netdev = dev_get_drvdata(dev); | |
1615 | ibmveth_interrupt(netdev->irq, netdev); | |
1616 | return 0; | |
1617 | } | |
860f242e | 1618 | |
1da177e4 LT |
1619 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1620 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1621 | { "", "" } |
1da177e4 | 1622 | }; |
1da177e4 LT |
1623 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1624 | ||
e7a3af5d BK |
1625 | static struct dev_pm_ops ibmveth_pm_ops = { |
1626 | .resume = ibmveth_resume | |
1627 | }; | |
1628 | ||
1da177e4 | 1629 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1630 | .id_table = ibmveth_device_table, |
1631 | .probe = ibmveth_probe, | |
1632 | .remove = ibmveth_remove, | |
1096d63d | 1633 | .get_desired_dma = ibmveth_get_desired_dma, |
6fdf5392 SR |
1634 | .driver = { |
1635 | .name = ibmveth_driver_name, | |
915124d8 | 1636 | .owner = THIS_MODULE, |
e7a3af5d | 1637 | .pm = &ibmveth_pm_ops, |
6fdf5392 | 1638 | } |
1da177e4 LT |
1639 | }; |
1640 | ||
1641 | static int __init ibmveth_module_init(void) | |
1642 | { | |
21c2dece SL |
1643 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1644 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1645 | |
1da177e4 LT |
1646 | return vio_register_driver(&ibmveth_driver); |
1647 | } | |
1648 | ||
1649 | static void __exit ibmveth_module_exit(void) | |
1650 | { | |
1651 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1652 | } |
1da177e4 LT |
1653 | |
1654 | module_init(ibmveth_module_init); | |
1655 | module_exit(ibmveth_module_exit); |