Commit | Line | Data |
---|---|---|
f148f61d | 1 | /* |
9d348af4 | 2 | * IBM Power Virtual Ethernet Device Driver |
f148f61d | 3 | * |
9d348af4 SL |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
f148f61d | 8 | * |
9d348af4 SL |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
f148f61d | 13 | * |
9d348af4 SL |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
f148f61d | 17 | * |
9d348af4 SL |
18 | * Copyright (C) IBM Corporation, 2003, 2010 |
19 | * | |
20 | * Authors: Dave Larson <larson1@us.ibm.com> | |
21 | * Santiago Leon <santil@linux.vnet.ibm.com> | |
22 | * Brian King <brking@linux.vnet.ibm.com> | |
23 | * Robert Jennings <rcj@linux.vnet.ibm.com> | |
24 | * Anton Blanchard <anton@au.ibm.com> | |
f148f61d | 25 | */ |
1da177e4 | 26 | |
1da177e4 | 27 | #include <linux/module.h> |
1096d63d | 28 | #include <linux/moduleparam.h> |
1da177e4 LT |
29 | #include <linux/types.h> |
30 | #include <linux/errno.h> | |
1da177e4 LT |
31 | #include <linux/dma-mapping.h> |
32 | #include <linux/kernel.h> | |
33 | #include <linux/netdevice.h> | |
34 | #include <linux/etherdevice.h> | |
35 | #include <linux/skbuff.h> | |
36 | #include <linux/init.h> | |
a6b7a407 | 37 | #include <linux/interrupt.h> |
1da177e4 | 38 | #include <linux/mm.h> |
e7a3af5d | 39 | #include <linux/pm.h> |
1da177e4 | 40 | #include <linux/ethtool.h> |
f4ff2872 BK |
41 | #include <linux/in.h> |
42 | #include <linux/ip.h> | |
ab78df75 | 43 | #include <linux/ipv6.h> |
5a0e3ad6 | 44 | #include <linux/slab.h> |
1da177e4 | 45 | #include <asm/hvcall.h> |
60063497 | 46 | #include <linux/atomic.h> |
1da177e4 | 47 | #include <asm/vio.h> |
1096d63d | 48 | #include <asm/iommu.h> |
1096d63d | 49 | #include <asm/firmware.h> |
1da177e4 LT |
50 | |
51 | #include "ibmveth.h" | |
52 | ||
7d12e780 | 53 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 54 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 55 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
e295fe83 | 56 | |
860f242e | 57 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 58 | |
1096d63d | 59 | |
1da177e4 | 60 | static const char ibmveth_driver_name[] = "ibmveth"; |
9d348af4 SL |
61 | static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; |
62 | #define ibmveth_driver_version "1.04" | |
1da177e4 | 63 | |
9d348af4 SL |
64 | MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>"); |
65 | MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); | |
1da177e4 LT |
66 | MODULE_LICENSE("GPL"); |
67 | MODULE_VERSION(ibmveth_driver_version); | |
68 | ||
c08cc3cc SL |
69 | static unsigned int tx_copybreak __read_mostly = 128; |
70 | module_param(tx_copybreak, uint, 0644); | |
71 | MODULE_PARM_DESC(tx_copybreak, | |
72 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
73 | ||
8d86c61a SL |
74 | static unsigned int rx_copybreak __read_mostly = 128; |
75 | module_param(rx_copybreak, uint, 0644); | |
76 | MODULE_PARM_DESC(rx_copybreak, | |
77 | "Maximum size of packet that is copied to a new buffer on receive"); | |
78 | ||
0c26b677 SL |
79 | static unsigned int rx_flush __read_mostly = 0; |
80 | module_param(rx_flush, uint, 0644); | |
81 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
82 | ||
ddbb4de9 BK |
83 | struct ibmveth_stat { |
84 | char name[ETH_GSTRING_LEN]; | |
85 | int offset; | |
86 | }; | |
87 | ||
88 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
89 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
90 | ||
91 | struct ibmveth_stat ibmveth_stats[] = { | |
92 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
93 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
f148f61d SL |
94 | { "replenish_add_buff_failure", |
95 | IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
96 | { "replenish_add_buff_success", | |
97 | IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
ddbb4de9 BK |
98 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, |
99 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
100 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
101 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
102 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
103 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
ddbb4de9 BK |
104 | }; |
105 | ||
1da177e4 | 106 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
107 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
108 | { | |
109 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
110 | } | |
111 | ||
112 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
113 | { | |
f148f61d SL |
114 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> |
115 | IBMVETH_RXQ_TOGGLE_SHIFT; | |
79ef4a4d BK |
116 | } |
117 | ||
1da177e4 LT |
118 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
119 | { | |
f148f61d | 120 | return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; |
1da177e4 LT |
121 | } |
122 | ||
123 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
124 | { | |
f148f61d | 125 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; |
1da177e4 LT |
126 | } |
127 | ||
128 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
129 | { | |
f148f61d | 130 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; |
1da177e4 LT |
131 | } |
132 | ||
133 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
134 | { | |
f148f61d | 135 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].length; |
1da177e4 LT |
136 | } |
137 | ||
f4ff2872 BK |
138 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
139 | { | |
f148f61d | 140 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; |
f4ff2872 BK |
141 | } |
142 | ||
1da177e4 | 143 | /* setup the initial settings for a buffer pool */ |
f148f61d SL |
144 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, |
145 | u32 pool_index, u32 pool_size, | |
146 | u32 buff_size, u32 pool_active) | |
1da177e4 LT |
147 | { |
148 | pool->size = pool_size; | |
149 | pool->index = pool_index; | |
150 | pool->buff_size = buff_size; | |
c033a6d1 | 151 | pool->threshold = pool_size * 7 / 8; |
860f242e | 152 | pool->active = pool_active; |
1da177e4 LT |
153 | } |
154 | ||
155 | /* allocate and setup an buffer pool - called during open */ | |
156 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
157 | { | |
158 | int i; | |
159 | ||
d7fbeba6 | 160 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 | 161 | |
f148f61d | 162 | if (!pool->free_map) |
1da177e4 | 163 | return -1; |
1da177e4 | 164 | |
d7fbeba6 | 165 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
f148f61d | 166 | if (!pool->dma_addr) { |
1da177e4 LT |
167 | kfree(pool->free_map); |
168 | pool->free_map = NULL; | |
169 | return -1; | |
170 | } | |
171 | ||
a05abcb5 | 172 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 | 173 | |
f148f61d | 174 | if (!pool->skbuff) { |
1da177e4 LT |
175 | kfree(pool->dma_addr); |
176 | pool->dma_addr = NULL; | |
177 | ||
178 | kfree(pool->free_map); | |
179 | pool->free_map = NULL; | |
180 | return -1; | |
181 | } | |
182 | ||
1da177e4 LT |
183 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
184 | ||
f148f61d | 185 | for (i = 0; i < pool->size; ++i) |
1da177e4 | 186 | pool->free_map[i] = i; |
1da177e4 LT |
187 | |
188 | atomic_set(&pool->available, 0); | |
189 | pool->producer_index = 0; | |
190 | pool->consumer_index = 0; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
0c26b677 SL |
195 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
196 | { | |
197 | unsigned long offset; | |
198 | ||
199 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
200 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
201 | } | |
202 | ||
1da177e4 LT |
203 | /* replenish the buffers for a pool. note that we don't need to |
204 | * skb_reserve these since they are used for incoming... | |
205 | */ | |
f148f61d SL |
206 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, |
207 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
208 | { |
209 | u32 i; | |
210 | u32 count = pool->size - atomic_read(&pool->available); | |
211 | u32 buffers_added = 0; | |
1096d63d RJ |
212 | struct sk_buff *skb; |
213 | unsigned int free_index, index; | |
214 | u64 correlator; | |
215 | unsigned long lpar_rc; | |
216 | dma_addr_t dma_addr; | |
1da177e4 LT |
217 | |
218 | mb(); | |
219 | ||
f148f61d | 220 | for (i = 0; i < count; ++i) { |
1da177e4 | 221 | union ibmveth_buf_desc desc; |
1da177e4 | 222 | |
003212cc | 223 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 | 224 | |
f148f61d | 225 | if (!skb) { |
c43ced18 SL |
226 | netdev_dbg(adapter->netdev, |
227 | "replenish: unable to allocate skb\n"); | |
1da177e4 LT |
228 | adapter->replenish_no_mem++; |
229 | break; | |
230 | } | |
231 | ||
047a66d4 | 232 | free_index = pool->consumer_index; |
a613f581 SL |
233 | pool->consumer_index++; |
234 | if (pool->consumer_index >= pool->size) | |
235 | pool->consumer_index = 0; | |
1da177e4 | 236 | index = pool->free_map[free_index]; |
d7fbeba6 | 237 | |
6485911a SL |
238 | BUG_ON(index == IBM_VETH_INVALID_MAP); |
239 | BUG_ON(pool->skbuff[index] != NULL); | |
1da177e4 LT |
240 | |
241 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
242 | pool->buff_size, DMA_FROM_DEVICE); | |
243 | ||
c713e7cb | 244 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
245 | goto failure; |
246 | ||
1da177e4 LT |
247 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
248 | pool->dma_addr[index] = dma_addr; | |
249 | pool->skbuff[index] = skb; | |
250 | ||
251 | correlator = ((u64)pool->index << 32) | index; | |
f148f61d | 252 | *(u64 *)skb->data = correlator; |
1da177e4 | 253 | |
79ef4a4d | 254 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 255 | desc.fields.address = dma_addr; |
1da177e4 | 256 | |
0c26b677 SL |
257 | if (rx_flush) { |
258 | unsigned int len = min(pool->buff_size, | |
259 | adapter->netdev->mtu + | |
260 | IBMVETH_BUFF_OH); | |
261 | ibmveth_flush_buffer(skb->data, len); | |
262 | } | |
f148f61d SL |
263 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, |
264 | desc.desc); | |
d7fbeba6 | 265 | |
f148f61d | 266 | if (lpar_rc != H_SUCCESS) { |
1096d63d | 267 | goto failure; |
f148f61d | 268 | } else { |
1da177e4 LT |
269 | buffers_added++; |
270 | adapter->replenish_add_buff_success++; | |
271 | } | |
272 | } | |
d7fbeba6 | 273 | |
1096d63d RJ |
274 | mb(); |
275 | atomic_add(buffers_added, &(pool->available)); | |
276 | return; | |
277 | ||
278 | failure: | |
279 | pool->free_map[free_index] = index; | |
280 | pool->skbuff[index] = NULL; | |
281 | if (pool->consumer_index == 0) | |
282 | pool->consumer_index = pool->size - 1; | |
283 | else | |
284 | pool->consumer_index--; | |
c713e7cb | 285 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
286 | dma_unmap_single(&adapter->vdev->dev, |
287 | pool->dma_addr[index], pool->buff_size, | |
288 | DMA_FROM_DEVICE); | |
289 | dev_kfree_skb_any(skb); | |
290 | adapter->replenish_add_buff_failure++; | |
291 | ||
1da177e4 LT |
292 | mb(); |
293 | atomic_add(buffers_added, &(pool->available)); | |
294 | } | |
295 | ||
e2adbcb4 | 296 | /* replenish routine */ |
d7fbeba6 | 297 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 298 | { |
b6d35182 SL |
299 | int i; |
300 | ||
1da177e4 LT |
301 | adapter->replenish_task_cycles++; |
302 | ||
517e80e6 | 303 | for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { |
c033a6d1 SL |
304 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; |
305 | ||
306 | if (pool->active && | |
307 | (atomic_read(&pool->available) < pool->threshold)) | |
308 | ibmveth_replenish_buffer_pool(adapter, pool); | |
309 | } | |
1da177e4 | 310 | |
f148f61d SL |
311 | adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) + |
312 | 4096 - 8); | |
1da177e4 LT |
313 | } |
314 | ||
315 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
f148f61d SL |
316 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, |
317 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
318 | { |
319 | int i; | |
320 | ||
b4558ea9 JJ |
321 | kfree(pool->free_map); |
322 | pool->free_map = NULL; | |
1da177e4 | 323 | |
f148f61d SL |
324 | if (pool->skbuff && pool->dma_addr) { |
325 | for (i = 0; i < pool->size; ++i) { | |
1da177e4 | 326 | struct sk_buff *skb = pool->skbuff[i]; |
f148f61d | 327 | if (skb) { |
1da177e4 LT |
328 | dma_unmap_single(&adapter->vdev->dev, |
329 | pool->dma_addr[i], | |
330 | pool->buff_size, | |
331 | DMA_FROM_DEVICE); | |
332 | dev_kfree_skb_any(skb); | |
333 | pool->skbuff[i] = NULL; | |
334 | } | |
335 | } | |
336 | } | |
337 | ||
f148f61d | 338 | if (pool->dma_addr) { |
1da177e4 LT |
339 | kfree(pool->dma_addr); |
340 | pool->dma_addr = NULL; | |
341 | } | |
342 | ||
f148f61d | 343 | if (pool->skbuff) { |
1da177e4 LT |
344 | kfree(pool->skbuff); |
345 | pool->skbuff = NULL; | |
346 | } | |
347 | } | |
348 | ||
349 | /* remove a buffer from a pool */ | |
f148f61d SL |
350 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, |
351 | u64 correlator) | |
1da177e4 LT |
352 | { |
353 | unsigned int pool = correlator >> 32; | |
354 | unsigned int index = correlator & 0xffffffffUL; | |
355 | unsigned int free_index; | |
356 | struct sk_buff *skb; | |
357 | ||
6485911a SL |
358 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
359 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
360 | |
361 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
362 | ||
6485911a | 363 | BUG_ON(skb == NULL); |
1da177e4 LT |
364 | |
365 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
366 | ||
367 | dma_unmap_single(&adapter->vdev->dev, | |
368 | adapter->rx_buff_pool[pool].dma_addr[index], | |
369 | adapter->rx_buff_pool[pool].buff_size, | |
370 | DMA_FROM_DEVICE); | |
371 | ||
047a66d4 | 372 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
373 | adapter->rx_buff_pool[pool].producer_index++; |
374 | if (adapter->rx_buff_pool[pool].producer_index >= | |
375 | adapter->rx_buff_pool[pool].size) | |
376 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
377 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
378 | ||
379 | mb(); | |
380 | ||
381 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
382 | } | |
383 | ||
384 | /* get the current buffer on the rx queue */ | |
385 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
386 | { | |
387 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
388 | unsigned int pool = correlator >> 32; | |
389 | unsigned int index = correlator & 0xffffffffUL; | |
390 | ||
6485911a SL |
391 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
392 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
393 | |
394 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
395 | } | |
396 | ||
397 | /* recycle the current buffer on the rx queue */ | |
c6f59d13 | 398 | static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
399 | { |
400 | u32 q_index = adapter->rx_queue.index; | |
401 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
402 | unsigned int pool = correlator >> 32; | |
403 | unsigned int index = correlator & 0xffffffffUL; | |
404 | union ibmveth_buf_desc desc; | |
405 | unsigned long lpar_rc; | |
c6f59d13 | 406 | int ret = 1; |
1da177e4 | 407 | |
6485911a SL |
408 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
409 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 | 410 | |
f148f61d | 411 | if (!adapter->rx_buff_pool[pool].active) { |
b6d35182 SL |
412 | ibmveth_rxq_harvest_buffer(adapter); |
413 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
c6f59d13 | 414 | goto out; |
b6d35182 SL |
415 | } |
416 | ||
79ef4a4d BK |
417 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
418 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
419 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
420 | ||
421 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 422 | |
f148f61d | 423 | if (lpar_rc != H_SUCCESS) { |
c43ced18 SL |
424 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
425 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 | 426 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
c6f59d13 | 427 | ret = 0; |
1da177e4 LT |
428 | } |
429 | ||
f148f61d | 430 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
431 | adapter->rx_queue.index = 0; |
432 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
433 | } | |
c6f59d13 AB |
434 | |
435 | out: | |
436 | return ret; | |
1da177e4 LT |
437 | } |
438 | ||
493a684a | 439 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
440 | { |
441 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
442 | ||
f148f61d | 443 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
444 | adapter->rx_queue.index = 0; |
445 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
446 | } | |
447 | } | |
448 | ||
449 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
450 | { | |
b6d35182 | 451 | int i; |
8d8bb39b | 452 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 453 | |
f148f61d | 454 | if (adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
455 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
456 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
457 | DMA_BIDIRECTIONAL); |
458 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
459 | } | |
460 | free_page((unsigned long)adapter->buffer_list_addr); | |
461 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 462 | } |
1da177e4 | 463 | |
f148f61d | 464 | if (adapter->filter_list_addr != NULL) { |
8d8bb39b FT |
465 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
466 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
467 | DMA_BIDIRECTIONAL); |
468 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
469 | } | |
470 | free_page((unsigned long)adapter->filter_list_addr); | |
471 | adapter->filter_list_addr = NULL; | |
472 | } | |
473 | ||
f148f61d | 474 | if (adapter->rx_queue.queue_addr != NULL) { |
d90c92fe SL |
475 | dma_free_coherent(dev, adapter->rx_queue.queue_len, |
476 | adapter->rx_queue.queue_addr, | |
477 | adapter->rx_queue.queue_dma); | |
1da177e4 LT |
478 | adapter->rx_queue.queue_addr = NULL; |
479 | } | |
480 | ||
f148f61d | 481 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
860f242e | 482 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 483 | ibmveth_free_buffer_pool(adapter, |
860f242e | 484 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
485 | |
486 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 487 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
488 | dma_unmap_single(&adapter->vdev->dev, |
489 | adapter->bounce_buffer_dma, | |
490 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
491 | DMA_BIDIRECTIONAL); | |
492 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
493 | } | |
494 | kfree(adapter->bounce_buffer); | |
495 | adapter->bounce_buffer = NULL; | |
496 | } | |
1da177e4 LT |
497 | } |
498 | ||
bbedefcc ME |
499 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
500 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
501 | { | |
502 | int rc, try_again = 1; | |
503 | ||
f148f61d SL |
504 | /* |
505 | * After a kexec the adapter will still be open, so our attempt to | |
506 | * open it will fail. So if we get a failure we free the adapter and | |
507 | * try again, but only once. | |
508 | */ | |
bbedefcc ME |
509 | retry: |
510 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
511 | adapter->buffer_list_dma, rxq_desc.desc, | |
512 | adapter->filter_list_dma, mac_address); | |
513 | ||
514 | if (rc != H_SUCCESS && try_again) { | |
515 | do { | |
516 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
517 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
518 | ||
519 | try_again = 0; | |
520 | goto retry; | |
521 | } | |
522 | ||
523 | return rc; | |
524 | } | |
525 | ||
1da177e4 LT |
526 | static int ibmveth_open(struct net_device *netdev) |
527 | { | |
4cf1653a | 528 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 529 | u64 mac_address = 0; |
b6d35182 | 530 | int rxq_entries = 1; |
1da177e4 LT |
531 | unsigned long lpar_rc; |
532 | int rc; | |
533 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 534 | int i; |
8d8bb39b | 535 | struct device *dev; |
1da177e4 | 536 | |
c43ced18 | 537 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 538 | |
bea3348e SH |
539 | napi_enable(&adapter->napi); |
540 | ||
517e80e6 | 541 | for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
b6d35182 | 542 | rxq_entries += adapter->rx_buff_pool[i].size; |
d7fbeba6 | 543 | |
1da177e4 LT |
544 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
545 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 546 | |
f148f61d | 547 | if (!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
21c2dece SL |
548 | netdev_err(netdev, "unable to allocate filter or buffer list " |
549 | "pages\n"); | |
88426f2a DK |
550 | rc = -ENOMEM; |
551 | goto err_out; | |
1da177e4 LT |
552 | } |
553 | ||
d90c92fe SL |
554 | dev = &adapter->vdev->dev; |
555 | ||
f148f61d SL |
556 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
557 | rxq_entries; | |
d90c92fe SL |
558 | adapter->rx_queue.queue_addr = |
559 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, | |
560 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
1da177e4 | 561 | |
f148f61d | 562 | if (!adapter->rx_queue.queue_addr) { |
21c2dece | 563 | netdev_err(netdev, "unable to allocate rx queue pages\n"); |
88426f2a DK |
564 | rc = -ENOMEM; |
565 | goto err_out; | |
1da177e4 LT |
566 | } |
567 | ||
8d8bb39b | 568 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 569 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 570 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 571 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
1da177e4 | 572 | |
8d8bb39b | 573 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
d90c92fe | 574 | (dma_mapping_error(dev, adapter->filter_list_dma))) { |
21c2dece SL |
575 | netdev_err(netdev, "unable to map filter or buffer list " |
576 | "pages\n"); | |
88426f2a DK |
577 | rc = -ENOMEM; |
578 | goto err_out; | |
1da177e4 LT |
579 | } |
580 | ||
581 | adapter->rx_queue.index = 0; | |
582 | adapter->rx_queue.num_slots = rxq_entries; | |
583 | adapter->rx_queue.toggle = 1; | |
584 | ||
1da177e4 LT |
585 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
586 | mac_address = mac_address >> 16; | |
587 | ||
f148f61d SL |
588 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
589 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
590 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
591 | ||
c43ced18 SL |
592 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
593 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
594 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 595 | |
4347ef15 SL |
596 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
597 | ||
bbedefcc | 598 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 599 | |
f148f61d | 600 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
601 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
602 | lpar_rc); | |
603 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
604 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
605 | adapter->buffer_list_dma, |
606 | adapter->filter_list_dma, | |
607 | rxq_desc.desc, | |
608 | mac_address); | |
88426f2a DK |
609 | rc = -ENONET; |
610 | goto err_out; | |
1da177e4 LT |
611 | } |
612 | ||
f148f61d SL |
613 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
614 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
615 | continue; |
616 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 617 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 618 | adapter->rx_buff_pool[i].active = 0; |
88426f2a DK |
619 | rc = -ENOMEM; |
620 | goto err_out; | |
860f242e SL |
621 | } |
622 | } | |
623 | ||
c43ced18 | 624 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
625 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
626 | netdev); | |
627 | if (rc != 0) { | |
21c2dece SL |
628 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
629 | netdev->irq, rc); | |
1da177e4 | 630 | do { |
95de86cf BK |
631 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
632 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 633 | |
88426f2a | 634 | goto err_out; |
1da177e4 LT |
635 | } |
636 | ||
1096d63d RJ |
637 | adapter->bounce_buffer = |
638 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
639 | if (!adapter->bounce_buffer) { | |
21c2dece | 640 | netdev_err(netdev, "unable to allocate bounce buffer\n"); |
88426f2a | 641 | rc = -ENOMEM; |
e0e8ab59 | 642 | goto err_out_free_irq; |
1096d63d RJ |
643 | } |
644 | adapter->bounce_buffer_dma = | |
645 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
646 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 647 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 648 | netdev_err(netdev, "unable to map bounce buffer\n"); |
88426f2a | 649 | rc = -ENOMEM; |
e0e8ab59 | 650 | goto err_out_free_irq; |
1096d63d RJ |
651 | } |
652 | ||
c43ced18 | 653 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 654 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 655 | |
e2adbcb4 | 656 | netif_start_queue(netdev); |
1da177e4 | 657 | |
c43ced18 | 658 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
659 | |
660 | return 0; | |
88426f2a | 661 | |
e0e8ab59 DK |
662 | err_out_free_irq: |
663 | free_irq(netdev->irq, netdev); | |
88426f2a DK |
664 | err_out: |
665 | ibmveth_cleanup(adapter); | |
666 | napi_disable(&adapter->napi); | |
667 | return rc; | |
1da177e4 LT |
668 | } |
669 | ||
670 | static int ibmveth_close(struct net_device *netdev) | |
671 | { | |
4cf1653a | 672 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 673 | long lpar_rc; |
d7fbeba6 | 674 | |
c43ced18 | 675 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 676 | |
bea3348e SH |
677 | napi_disable(&adapter->napi); |
678 | ||
860f242e SL |
679 | if (!adapter->pool_config) |
680 | netif_stop_queue(netdev); | |
1da177e4 | 681 | |
ee2e6114 | 682 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 683 | |
1da177e4 LT |
684 | do { |
685 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 686 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 687 | |
f148f61d | 688 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
689 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
690 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
691 | } |
692 | ||
ee2e6114 RJ |
693 | free_irq(netdev->irq, netdev); |
694 | ||
f148f61d SL |
695 | adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) + |
696 | 4096 - 8); | |
1da177e4 LT |
697 | |
698 | ibmveth_cleanup(adapter); | |
699 | ||
c43ced18 | 700 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
701 | |
702 | return 0; | |
703 | } | |
704 | ||
f148f61d SL |
705 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
706 | { | |
707 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | | |
708 | SUPPORTED_FIBRE); | |
709 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | | |
710 | ADVERTISED_FIBRE); | |
70739497 | 711 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
1da177e4 LT |
712 | cmd->duplex = DUPLEX_FULL; |
713 | cmd->port = PORT_FIBRE; | |
714 | cmd->phy_address = 0; | |
715 | cmd->transceiver = XCVR_INTERNAL; | |
716 | cmd->autoneg = AUTONEG_ENABLE; | |
717 | cmd->maxtxpkt = 0; | |
718 | cmd->maxrxpkt = 1; | |
719 | return 0; | |
720 | } | |
721 | ||
f148f61d SL |
722 | static void netdev_get_drvinfo(struct net_device *dev, |
723 | struct ethtool_drvinfo *info) | |
724 | { | |
1da177e4 | 725 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); |
f148f61d SL |
726 | strncpy(info->version, ibmveth_driver_version, |
727 | sizeof(info->version) - 1); | |
1da177e4 LT |
728 | } |
729 | ||
c8f44aff MM |
730 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
731 | netdev_features_t features) | |
5fc7e01c | 732 | { |
b9367bf3 MM |
733 | /* |
734 | * Since the ibmveth firmware interface does not have the | |
735 | * concept of separate tx/rx checksum offload enable, if rx | |
736 | * checksum is disabled we also have to disable tx checksum | |
737 | * offload. Once we disable rx checksum offload, we are no | |
738 | * longer allowed to send tx buffers that are not properly | |
739 | * checksummed. | |
740 | */ | |
5fc7e01c | 741 | |
b9367bf3 MM |
742 | if (!(features & NETIF_F_RXCSUM)) |
743 | features &= ~NETIF_F_ALL_CSUM; | |
5fc7e01c | 744 | |
b9367bf3 | 745 | return features; |
5fc7e01c BK |
746 | } |
747 | ||
b9367bf3 | 748 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 749 | { |
4cf1653a | 750 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 751 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 752 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 753 | long ret, ret4, ret6; |
5fc7e01c BK |
754 | int rc1 = 0, rc2 = 0; |
755 | int restart = 0; | |
756 | ||
757 | if (netif_running(dev)) { | |
758 | restart = 1; | |
759 | adapter->pool_config = 1; | |
760 | ibmveth_close(dev); | |
761 | adapter->pool_config = 0; | |
762 | } | |
763 | ||
79ef4a4d BK |
764 | set_attr = 0; |
765 | clr_attr = 0; | |
fb82fd20 AB |
766 | set_attr6 = 0; |
767 | clr_attr6 = 0; | |
5fc7e01c | 768 | |
ab78df75 | 769 | if (data) { |
79ef4a4d | 770 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
771 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
772 | } else { | |
79ef4a4d | 773 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
774 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
775 | } | |
5fc7e01c | 776 | |
79ef4a4d | 777 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 778 | |
79ef4a4d BK |
779 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
780 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
781 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
fb82fd20 | 782 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 783 | set_attr, &ret_attr); |
5fc7e01c | 784 | |
fb82fd20 | 785 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
786 | netdev_err(dev, "unable to change IPv4 checksum " |
787 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
788 | data, ret4); |
789 | ||
790 | h_illan_attributes(adapter->vdev->unit_address, | |
791 | set_attr, clr_attr, &ret_attr); | |
792 | ||
793 | if (data == 1) | |
794 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 795 | |
f148f61d | 796 | } else { |
ab78df75 | 797 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 798 | } |
ab78df75 SL |
799 | |
800 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
801 | clr_attr6, set_attr6, &ret_attr); | |
802 | ||
803 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
804 | netdev_err(dev, "unable to change IPv6 checksum " |
805 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
806 | data, ret6); |
807 | ||
808 | h_illan_attributes(adapter->vdev->unit_address, | |
809 | set_attr6, clr_attr6, &ret_attr); | |
810 | ||
811 | if (data == 1) | |
812 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 813 | |
ab78df75 SL |
814 | } else |
815 | adapter->fw_ipv6_csum_support = data; | |
816 | ||
fb82fd20 | 817 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 818 | adapter->rx_csum = data; |
ab78df75 SL |
819 | else |
820 | rc1 = -EIO; | |
5fc7e01c BK |
821 | } else { |
822 | rc1 = -EIO; | |
21c2dece SL |
823 | netdev_err(dev, "unable to change checksum offload settings." |
824 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
825 | ret_attr); | |
5fc7e01c BK |
826 | } |
827 | ||
828 | if (restart) | |
829 | rc2 = ibmveth_open(dev); | |
830 | ||
831 | return rc1 ? rc1 : rc2; | |
832 | } | |
833 | ||
c8f44aff MM |
834 | static int ibmveth_set_features(struct net_device *dev, |
835 | netdev_features_t features) | |
5fc7e01c | 836 | { |
4cf1653a | 837 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 MM |
838 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
839 | int rc; | |
5fc7e01c | 840 | |
b9367bf3 | 841 | if (rx_csum == adapter->rx_csum) |
5fc7e01c BK |
842 | return 0; |
843 | ||
b9367bf3 MM |
844 | rc = ibmveth_set_csum_offload(dev, rx_csum); |
845 | if (rc && !adapter->rx_csum) | |
846 | dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM); | |
5fc7e01c BK |
847 | |
848 | return rc; | |
849 | } | |
850 | ||
ddbb4de9 BK |
851 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
852 | { | |
853 | int i; | |
854 | ||
855 | if (stringset != ETH_SS_STATS) | |
856 | return; | |
857 | ||
858 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
859 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
860 | } | |
861 | ||
b9f2c044 | 862 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 863 | { |
b9f2c044 JG |
864 | switch (sset) { |
865 | case ETH_SS_STATS: | |
866 | return ARRAY_SIZE(ibmveth_stats); | |
867 | default: | |
868 | return -EOPNOTSUPP; | |
869 | } | |
ddbb4de9 BK |
870 | } |
871 | ||
872 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
873 | struct ethtool_stats *stats, u64 *data) | |
874 | { | |
875 | int i; | |
4cf1653a | 876 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
877 | |
878 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
879 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
880 | } | |
881 | ||
7282d491 | 882 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
883 | .get_drvinfo = netdev_get_drvinfo, |
884 | .get_settings = netdev_get_settings, | |
ed4ba4b5 | 885 | .get_link = ethtool_op_get_link, |
ddbb4de9 | 886 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 887 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 888 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
1da177e4 LT |
889 | }; |
890 | ||
891 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
892 | { | |
893 | return -EOPNOTSUPP; | |
894 | } | |
895 | ||
896 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
897 | ||
6e8ab30e SL |
898 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
899 | union ibmveth_buf_desc *descs) | |
1da177e4 | 900 | { |
1da177e4 LT |
901 | unsigned long correlator; |
902 | unsigned int retry_count; | |
6e8ab30e SL |
903 | unsigned long ret; |
904 | ||
905 | /* | |
906 | * The retry count sets a maximum for the number of broadcast and | |
907 | * multicast destinations within the system. | |
908 | */ | |
909 | retry_count = 1024; | |
910 | correlator = 0; | |
911 | do { | |
912 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
913 | descs[0].desc, descs[1].desc, | |
914 | descs[2].desc, descs[3].desc, | |
915 | descs[4].desc, descs[5].desc, | |
916 | correlator, &correlator); | |
917 | } while ((ret == H_BUSY) && (retry_count--)); | |
918 | ||
919 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
920 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
921 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
922 | return 1; |
923 | } | |
924 | ||
925 | return 0; | |
926 | } | |
60296d9e | 927 | |
6e8ab30e SL |
928 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
929 | struct net_device *netdev) | |
930 | { | |
931 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
932 | unsigned int desc_flags; | |
933 | union ibmveth_buf_desc descs[6]; | |
934 | int last, i; | |
935 | int force_bounce = 0; | |
b93da27f | 936 | dma_addr_t dma_addr; |
6e8ab30e SL |
937 | |
938 | /* | |
939 | * veth handles a maximum of 6 segments including the header, so | |
940 | * we have to linearize the skb if there are more than this. | |
941 | */ | |
942 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
943 | netdev->stats.tx_dropped++; | |
944 | goto out; | |
945 | } | |
1da177e4 | 946 | |
6e8ab30e | 947 | /* veth can't checksum offload UDP */ |
f4ff2872 | 948 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
949 | ((skb->protocol == htons(ETH_P_IP) && |
950 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
951 | (skb->protocol == htons(ETH_P_IPV6) && | |
952 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
953 | skb_checksum_help(skb)) { | |
954 | ||
21c2dece | 955 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 956 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
957 | goto out; |
958 | } | |
959 | ||
6e8ab30e SL |
960 | desc_flags = IBMVETH_BUF_VALID; |
961 | ||
f4ff2872 | 962 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
963 | unsigned char *buf = skb_transport_header(skb) + |
964 | skb->csum_offset; | |
f4ff2872 | 965 | |
6e8ab30e | 966 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
967 | |
968 | /* Need to zero out the checksum */ | |
969 | buf[0] = 0; | |
970 | buf[1] = 0; | |
971 | } | |
972 | ||
6e8ab30e SL |
973 | retry_bounce: |
974 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 975 | |
6e8ab30e SL |
976 | /* |
977 | * If a linear packet is below the rx threshold then | |
978 | * copy it into the static bounce buffer. This avoids the | |
979 | * cost of a TCE insert and remove. | |
980 | */ | |
981 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
982 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
983 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
984 | skb->len); | |
1da177e4 | 985 | |
6e8ab30e SL |
986 | descs[0].fields.flags_len = desc_flags | skb->len; |
987 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
988 | ||
989 | if (ibmveth_send(adapter, descs)) { | |
990 | adapter->tx_send_failed++; | |
991 | netdev->stats.tx_dropped++; | |
992 | } else { | |
993 | netdev->stats.tx_packets++; | |
994 | netdev->stats.tx_bytes += skb->len; | |
995 | } | |
996 | ||
997 | goto out; | |
998 | } | |
999 | ||
1000 | /* Map the header */ | |
b93da27f AB |
1001 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
1002 | skb_headlen(skb), DMA_TO_DEVICE); | |
1003 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
6e8ab30e SL |
1004 | goto map_failed; |
1005 | ||
1006 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
b93da27f | 1007 | descs[0].fields.address = dma_addr; |
6e8ab30e SL |
1008 | |
1009 | /* Map the frags */ | |
1010 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 1011 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
6e8ab30e | 1012 | |
8838a538 | 1013 | dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
9e903e08 | 1014 | skb_frag_size(frag), DMA_TO_DEVICE); |
6e8ab30e SL |
1015 | |
1016 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1017 | goto map_failed_frags; | |
1018 | ||
9e903e08 | 1019 | descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
6e8ab30e SL |
1020 | descs[i+1].fields.address = dma_addr; |
1021 | } | |
1022 | ||
1023 | if (ibmveth_send(adapter, descs)) { | |
1024 | adapter->tx_send_failed++; | |
1025 | netdev->stats.tx_dropped++; | |
1da177e4 | 1026 | } else { |
6e8ab30e SL |
1027 | netdev->stats.tx_packets++; |
1028 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1029 | } |
1030 | ||
33a48ab1 BK |
1031 | dma_unmap_single(&adapter->vdev->dev, |
1032 | descs[0].fields.address, | |
1033 | descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1034 | DMA_TO_DEVICE); | |
1035 | ||
1036 | for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) | |
6e8ab30e SL |
1037 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, |
1038 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1039 | DMA_TO_DEVICE); | |
1da177e4 | 1040 | |
e8cb7eb4 | 1041 | out: |
1da177e4 | 1042 | dev_kfree_skb(skb); |
6ed10654 | 1043 | return NETDEV_TX_OK; |
6e8ab30e SL |
1044 | |
1045 | map_failed_frags: | |
1046 | last = i+1; | |
1047 | for (i = 0; i < last; i++) | |
1048 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1049 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1050 | DMA_TO_DEVICE); | |
1051 | ||
1052 | map_failed: | |
1053 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1054 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e SL |
1055 | adapter->tx_map_failed++; |
1056 | skb_linearize(skb); | |
1057 | force_bounce = 1; | |
1058 | goto retry_bounce; | |
1da177e4 LT |
1059 | } |
1060 | ||
bea3348e | 1061 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1062 | { |
f148f61d SL |
1063 | struct ibmveth_adapter *adapter = |
1064 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1065 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1066 | int frames_processed = 0; |
1da177e4 LT |
1067 | unsigned long lpar_rc; |
1068 | ||
f148f61d | 1069 | restart_poll: |
1da177e4 | 1070 | do { |
bea3348e SH |
1071 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1072 | break; | |
1da177e4 | 1073 | |
f89e49e7 | 1074 | smp_rmb(); |
bea3348e SH |
1075 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1076 | wmb(); /* suggested by larson1 */ | |
1077 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1078 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1079 | ibmveth_rxq_recycle_buffer(adapter); |
1080 | } else { | |
8d86c61a | 1081 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1082 | int length = ibmveth_rxq_frame_length(adapter); |
1083 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1084 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1085 | ||
bea3348e | 1086 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1087 | |
8d86c61a SL |
1088 | new_skb = NULL; |
1089 | if (length < rx_copybreak) | |
1090 | new_skb = netdev_alloc_skb(netdev, length); | |
1091 | ||
1092 | if (new_skb) { | |
1093 | skb_copy_to_linear_data(new_skb, | |
1094 | skb->data + offset, | |
1095 | length); | |
0c26b677 SL |
1096 | if (rx_flush) |
1097 | ibmveth_flush_buffer(skb->data, | |
1098 | length + offset); | |
c6f59d13 AB |
1099 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1100 | kfree_skb(skb); | |
8d86c61a | 1101 | skb = new_skb; |
8d86c61a SL |
1102 | } else { |
1103 | ibmveth_rxq_harvest_buffer(adapter); | |
1104 | skb_reserve(skb, offset); | |
1105 | } | |
1da177e4 | 1106 | |
bea3348e SH |
1107 | skb_put(skb, length); |
1108 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1109 | |
8d86c61a SL |
1110 | if (csum_good) |
1111 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1112 | ||
bea3348e | 1113 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1114 | |
09f75cd7 JG |
1115 | netdev->stats.rx_packets++; |
1116 | netdev->stats.rx_bytes += length; | |
bea3348e | 1117 | frames_processed++; |
1da177e4 | 1118 | } |
bea3348e | 1119 | } while (frames_processed < budget); |
1da177e4 | 1120 | |
e2adbcb4 | 1121 | ibmveth_replenish_task(adapter); |
1da177e4 | 1122 | |
bea3348e SH |
1123 | if (frames_processed < budget) { |
1124 | /* We think we are done - reenable interrupts, | |
1125 | * then check once more to make sure we are done. | |
1126 | */ | |
1127 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1128 | VIO_IRQ_ENABLE); | |
1da177e4 | 1129 | |
6485911a | 1130 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1131 | |
288379f0 | 1132 | napi_complete(napi); |
1da177e4 | 1133 | |
bea3348e | 1134 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1135 | napi_reschedule(napi)) { |
bea3348e SH |
1136 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1137 | VIO_IRQ_DISABLE); | |
1138 | goto restart_poll; | |
1139 | } | |
1da177e4 LT |
1140 | } |
1141 | ||
bea3348e | 1142 | return frames_processed; |
1da177e4 LT |
1143 | } |
1144 | ||
7d12e780 | 1145 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1146 | { |
1da177e4 | 1147 | struct net_device *netdev = dev_instance; |
4cf1653a | 1148 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1149 | unsigned long lpar_rc; |
1150 | ||
288379f0 | 1151 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1152 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1153 | VIO_IRQ_DISABLE); | |
6485911a | 1154 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1155 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1156 | } |
1157 | return IRQ_HANDLED; | |
1158 | } | |
1159 | ||
1da177e4 LT |
1160 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1161 | { | |
4cf1653a | 1162 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1163 | unsigned long lpar_rc; |
1164 | ||
4cd24eaf JP |
1165 | if ((netdev->flags & IFF_PROMISC) || |
1166 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1167 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1168 | IbmVethMcastEnableRecv | | |
1169 | IbmVethMcastDisableFiltering, | |
1170 | 0); | |
f148f61d | 1171 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1172 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1173 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1174 | } |
1175 | } else { | |
22bedad3 | 1176 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1177 | /* clear the filter table & disable filtering */ |
1178 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1179 | IbmVethMcastEnableRecv | | |
1180 | IbmVethMcastDisableFiltering | | |
1181 | IbmVethMcastClearFilterTable, | |
1182 | 0); | |
f148f61d | 1183 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1184 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1185 | "attempting to clear filter table\n", | |
1186 | lpar_rc); | |
1da177e4 LT |
1187 | } |
1188 | /* add the addresses to the filter table */ | |
22bedad3 | 1189 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1190 | /* add the multicast address to the filter table */ |
1da177e4 | 1191 | unsigned long mcast_addr = 0; |
22bedad3 | 1192 | memcpy(((char *)&mcast_addr)+2, ha->addr, 6); |
1da177e4 LT |
1193 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1194 | IbmVethMcastAddFilter, | |
1195 | mcast_addr); | |
f148f61d | 1196 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1197 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1198 | "when adding an entry to the filter " | |
1199 | "table\n", lpar_rc); | |
1da177e4 LT |
1200 | } |
1201 | } | |
d7fbeba6 | 1202 | |
1da177e4 LT |
1203 | /* re-enable filtering */ |
1204 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1205 | IbmVethMcastEnableFiltering, | |
1206 | 0); | |
f148f61d | 1207 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1208 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1209 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1210 | } |
1211 | } | |
1212 | } | |
1213 | ||
1214 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1215 | { | |
4cf1653a | 1216 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1217 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1218 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1219 | int i, rc; |
1220 | int need_restart = 0; | |
b6d35182 | 1221 | |
517e80e6 | 1222 | if (new_mtu < IBMVETH_MIN_MTU) |
1da177e4 | 1223 | return -EINVAL; |
b6d35182 | 1224 | |
517e80e6 | 1225 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
ce6eea58 BK |
1226 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) |
1227 | break; | |
1228 | ||
517e80e6 | 1229 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1230 | return -EINVAL; |
1231 | ||
ea866e65 SL |
1232 | /* Deactivate all the buffer pools so that the next loop can activate |
1233 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1234 | if (netif_running(adapter->netdev)) { |
1235 | need_restart = 1; | |
1236 | adapter->pool_config = 1; | |
1237 | ibmveth_close(adapter->netdev); | |
1238 | adapter->pool_config = 0; | |
1239 | } | |
ea866e65 | 1240 | |
860f242e | 1241 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1242 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1243 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1244 | |
860f242e | 1245 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1246 | dev->mtu = new_mtu; |
1247 | vio_cmo_set_dev_desired(viodev, | |
1248 | ibmveth_get_desired_dma | |
1249 | (viodev)); | |
0645bab7 RJ |
1250 | if (need_restart) { |
1251 | return ibmveth_open(adapter->netdev); | |
1252 | } | |
860f242e | 1253 | return 0; |
b6d35182 | 1254 | } |
b6d35182 | 1255 | } |
0645bab7 RJ |
1256 | |
1257 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1258 | return rc; | |
1259 | ||
860f242e | 1260 | return -EINVAL; |
1da177e4 LT |
1261 | } |
1262 | ||
6b422374 SL |
1263 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1264 | static void ibmveth_poll_controller(struct net_device *dev) | |
1265 | { | |
4cf1653a | 1266 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1267 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1268 | } |
1269 | #endif | |
1270 | ||
1096d63d RJ |
1271 | /** |
1272 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1273 | * | |
1274 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1275 | * | |
1276 | * Return value: | |
1277 | * Number of bytes of IO data the driver will need to perform well. | |
1278 | */ | |
1279 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1280 | { | |
1281 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1282 | struct ibmveth_adapter *adapter; | |
1283 | unsigned long ret; | |
1284 | int i; | |
1285 | int rxqentries = 1; | |
1286 | ||
1287 | /* netdev inits at probe time along with the structures we need below*/ | |
1288 | if (netdev == NULL) | |
1289 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1290 | ||
1291 | adapter = netdev_priv(netdev); | |
1292 | ||
1293 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1294 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1295 | ||
517e80e6 | 1296 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1297 | /* add the size of the active receive buffers */ |
1298 | if (adapter->rx_buff_pool[i].active) | |
1299 | ret += | |
1300 | adapter->rx_buff_pool[i].size * | |
1301 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1302 | buff_size); | |
1303 | rxqentries += adapter->rx_buff_pool[i].size; | |
1304 | } | |
1305 | /* add the size of the receive queue entries */ | |
1306 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1307 | ||
1308 | return ret; | |
1309 | } | |
1310 | ||
e186d174 AB |
1311 | static const struct net_device_ops ibmveth_netdev_ops = { |
1312 | .ndo_open = ibmveth_open, | |
1313 | .ndo_stop = ibmveth_close, | |
1314 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1315 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
e186d174 AB |
1316 | .ndo_do_ioctl = ibmveth_ioctl, |
1317 | .ndo_change_mtu = ibmveth_change_mtu, | |
b9367bf3 MM |
1318 | .ndo_fix_features = ibmveth_fix_features, |
1319 | .ndo_set_features = ibmveth_set_features, | |
e186d174 AB |
1320 | .ndo_validate_addr = eth_validate_addr, |
1321 | .ndo_set_mac_address = eth_mac_addr, | |
1322 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1323 | .ndo_poll_controller = ibmveth_poll_controller, | |
1324 | #endif | |
1325 | }; | |
1326 | ||
1dd06ae8 | 1327 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1328 | { |
b6d35182 | 1329 | int rc, i; |
1da177e4 | 1330 | struct net_device *netdev; |
9dc83afd | 1331 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1332 | unsigned char *mac_addr_p; |
1333 | unsigned int *mcastFilterSize_p; | |
1334 | ||
c43ced18 SL |
1335 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1336 | dev->unit_address); | |
1da177e4 | 1337 | |
f148f61d SL |
1338 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
1339 | NULL); | |
1340 | if (!mac_addr_p) { | |
21c2dece | 1341 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1342 | return -EINVAL; |
1da177e4 | 1343 | } |
d7fbeba6 | 1344 | |
f148f61d | 1345 | mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, |
493a684a | 1346 | VETH_MCAST_FILTER_SIZE, NULL); |
f148f61d | 1347 | if (!mcastFilterSize_p) { |
21c2dece SL |
1348 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1349 | "attribute\n"); | |
be35ae9e | 1350 | return -EINVAL; |
1da177e4 | 1351 | } |
d7fbeba6 | 1352 | |
1da177e4 LT |
1353 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1354 | ||
f148f61d | 1355 | if (!netdev) |
1da177e4 LT |
1356 | return -ENOMEM; |
1357 | ||
4cf1653a | 1358 | adapter = netdev_priv(netdev); |
c7ae011d | 1359 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1360 | |
1361 | adapter->vdev = dev; | |
1362 | adapter->netdev = netdev; | |
f148f61d | 1363 | adapter->mcastFilterSize = *mcastFilterSize_p; |
860f242e | 1364 | adapter->pool_config = 0; |
d7fbeba6 | 1365 | |
bea3348e SH |
1366 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1367 | ||
f148f61d SL |
1368 | /* |
1369 | * Some older boxes running PHYP non-natively have an OF that returns | |
1370 | * a 8-byte local-mac-address field (and the first 2 bytes have to be | |
1371 | * ignored) while newer boxes' OF return a 6-byte field. Note that | |
1372 | * IEEE 1275 specifies that local-mac-address must be a 6-byte field. | |
1373 | * The RPA doc specifies that the first byte must be 10b, so we'll | |
1374 | * just look for it to solve this 8 vs. 6 byte field issue | |
1375 | */ | |
1da177e4 LT |
1376 | if ((*mac_addr_p & 0x3) != 0x02) |
1377 | mac_addr_p += 2; | |
1378 | ||
1379 | adapter->mac_addr = 0; | |
1380 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1381 | ||
1da177e4 | 1382 | netdev->irq = dev->irq; |
e186d174 AB |
1383 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1384 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1385 | SET_NETDEV_DEV(netdev, &dev->dev); |
b9367bf3 MM |
1386 | netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | |
1387 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
1388 | netdev->features |= netdev->hw_features; | |
1da177e4 | 1389 | |
d44b5e07 | 1390 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1391 | |
f148f61d | 1392 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1393 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1394 | int error; |
1395 | ||
d7fbeba6 JG |
1396 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1397 | pool_count[i], pool_size[i], | |
860f242e | 1398 | pool_active[i]); |
8dde2a96 GKH |
1399 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1400 | &dev->dev.kobj, "pool%d", i); | |
1401 | if (!error) | |
1402 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1403 | } |
1da177e4 | 1404 | |
c43ced18 | 1405 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1406 | |
1da177e4 LT |
1407 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1408 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1409 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1410 | ||
c43ced18 | 1411 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1412 | |
b801a4e7 MM |
1413 | ibmveth_set_features(netdev, netdev->features); |
1414 | ||
1da177e4 LT |
1415 | rc = register_netdev(netdev); |
1416 | ||
f148f61d | 1417 | if (rc) { |
c43ced18 | 1418 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1419 | free_netdev(netdev); |
1420 | return rc; | |
1421 | } | |
1422 | ||
c43ced18 | 1423 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1424 | |
1da177e4 LT |
1425 | return 0; |
1426 | } | |
1427 | ||
e11787a2 | 1428 | static int ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1429 | { |
c7ae011d | 1430 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1431 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1432 | int i; |
1433 | ||
f148f61d | 1434 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1435 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1436 | |
1437 | unregister_netdev(netdev); | |
1438 | ||
1da177e4 | 1439 | free_netdev(netdev); |
1096d63d RJ |
1440 | dev_set_drvdata(&dev->dev, NULL); |
1441 | ||
1da177e4 LT |
1442 | return 0; |
1443 | } | |
1444 | ||
860f242e SL |
1445 | static struct attribute veth_active_attr; |
1446 | static struct attribute veth_num_attr; | |
1447 | static struct attribute veth_size_attr; | |
1448 | ||
f148f61d SL |
1449 | static ssize_t veth_pool_show(struct kobject *kobj, |
1450 | struct attribute *attr, char *buf) | |
860f242e | 1451 | { |
d7fbeba6 | 1452 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1453 | struct ibmveth_buff_pool, |
1454 | kobj); | |
1455 | ||
1456 | if (attr == &veth_active_attr) | |
1457 | return sprintf(buf, "%d\n", pool->active); | |
1458 | else if (attr == &veth_num_attr) | |
1459 | return sprintf(buf, "%d\n", pool->size); | |
1460 | else if (attr == &veth_size_attr) | |
1461 | return sprintf(buf, "%d\n", pool->buff_size); | |
1462 | return 0; | |
1463 | } | |
1464 | ||
f148f61d SL |
1465 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1466 | const char *buf, size_t count) | |
860f242e | 1467 | { |
d7fbeba6 | 1468 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1469 | struct ibmveth_buff_pool, |
1470 | kobj); | |
c7ae011d GKH |
1471 | struct net_device *netdev = dev_get_drvdata( |
1472 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1473 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1474 | long value = simple_strtol(buf, NULL, 10); |
1475 | long rc; | |
1476 | ||
1477 | if (attr == &veth_active_attr) { | |
1478 | if (value && !pool->active) { | |
4aa9c93e | 1479 | if (netif_running(netdev)) { |
f148f61d | 1480 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1481 | netdev_err(netdev, |
1482 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1483 | return -ENOMEM; |
1484 | } | |
1485 | pool->active = 1; | |
1486 | adapter->pool_config = 1; | |
1487 | ibmveth_close(netdev); | |
1488 | adapter->pool_config = 0; | |
1489 | if ((rc = ibmveth_open(netdev))) | |
1490 | return rc; | |
f148f61d | 1491 | } else { |
4aa9c93e | 1492 | pool->active = 1; |
f148f61d | 1493 | } |
860f242e SL |
1494 | } else if (!value && pool->active) { |
1495 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1496 | int i; | |
1497 | /* Make sure there is a buffer pool with buffers that | |
1498 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1499 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1500 | if (pool == &adapter->rx_buff_pool[i]) |
1501 | continue; | |
1502 | if (!adapter->rx_buff_pool[i].active) | |
1503 | continue; | |
76b9cfcc BK |
1504 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1505 | break; | |
860f242e | 1506 | } |
76b9cfcc | 1507 | |
517e80e6 | 1508 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1509 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1510 | return -EPERM; |
1511 | } | |
76b9cfcc | 1512 | |
76b9cfcc BK |
1513 | if (netif_running(netdev)) { |
1514 | adapter->pool_config = 1; | |
1515 | ibmveth_close(netdev); | |
ea866e65 | 1516 | pool->active = 0; |
76b9cfcc BK |
1517 | adapter->pool_config = 0; |
1518 | if ((rc = ibmveth_open(netdev))) | |
1519 | return rc; | |
1520 | } | |
ea866e65 | 1521 | pool->active = 0; |
860f242e SL |
1522 | } |
1523 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1524 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1525 | return -EINVAL; |
f148f61d | 1526 | } else { |
4aa9c93e BK |
1527 | if (netif_running(netdev)) { |
1528 | adapter->pool_config = 1; | |
1529 | ibmveth_close(netdev); | |
1530 | adapter->pool_config = 0; | |
1531 | pool->size = value; | |
1532 | if ((rc = ibmveth_open(netdev))) | |
1533 | return rc; | |
f148f61d | 1534 | } else { |
4aa9c93e | 1535 | pool->size = value; |
f148f61d | 1536 | } |
860f242e SL |
1537 | } |
1538 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1539 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1540 | return -EINVAL; |
f148f61d | 1541 | } else { |
4aa9c93e BK |
1542 | if (netif_running(netdev)) { |
1543 | adapter->pool_config = 1; | |
1544 | ibmveth_close(netdev); | |
1545 | adapter->pool_config = 0; | |
1546 | pool->buff_size = value; | |
1547 | if ((rc = ibmveth_open(netdev))) | |
1548 | return rc; | |
f148f61d | 1549 | } else { |
4aa9c93e | 1550 | pool->buff_size = value; |
f148f61d | 1551 | } |
860f242e SL |
1552 | } |
1553 | } | |
1554 | ||
1555 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1556 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1557 | return count; |
1558 | } | |
1559 | ||
1560 | ||
f148f61d SL |
1561 | #define ATTR(_name, _mode) \ |
1562 | struct attribute veth_##_name##_attr = { \ | |
1563 | .name = __stringify(_name), .mode = _mode, \ | |
1564 | }; | |
860f242e SL |
1565 | |
1566 | static ATTR(active, 0644); | |
1567 | static ATTR(num, 0644); | |
1568 | static ATTR(size, 0644); | |
1569 | ||
f148f61d | 1570 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1571 | &veth_active_attr, |
1572 | &veth_num_attr, | |
1573 | &veth_size_attr, | |
1574 | NULL, | |
1575 | }; | |
1576 | ||
52cf25d0 | 1577 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1578 | .show = veth_pool_show, |
1579 | .store = veth_pool_store, | |
1580 | }; | |
1581 | ||
1582 | static struct kobj_type ktype_veth_pool = { | |
1583 | .release = NULL, | |
1584 | .sysfs_ops = &veth_pool_ops, | |
1585 | .default_attrs = veth_pool_attrs, | |
1586 | }; | |
1587 | ||
e7a3af5d BK |
1588 | static int ibmveth_resume(struct device *dev) |
1589 | { | |
1590 | struct net_device *netdev = dev_get_drvdata(dev); | |
1591 | ibmveth_interrupt(netdev->irq, netdev); | |
1592 | return 0; | |
1593 | } | |
860f242e | 1594 | |
e11787a2 | 1595 | static struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1596 | { "network", "IBM,l-lan"}, |
fb120da6 | 1597 | { "", "" } |
1da177e4 | 1598 | }; |
1da177e4 LT |
1599 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1600 | ||
e7a3af5d BK |
1601 | static struct dev_pm_ops ibmveth_pm_ops = { |
1602 | .resume = ibmveth_resume | |
1603 | }; | |
1604 | ||
1da177e4 | 1605 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1606 | .id_table = ibmveth_device_table, |
1607 | .probe = ibmveth_probe, | |
1608 | .remove = ibmveth_remove, | |
1096d63d | 1609 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1610 | .name = ibmveth_driver_name, |
1611 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1612 | }; |
1613 | ||
1614 | static int __init ibmveth_module_init(void) | |
1615 | { | |
21c2dece SL |
1616 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1617 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1618 | |
1da177e4 LT |
1619 | return vio_register_driver(&ibmveth_driver); |
1620 | } | |
1621 | ||
1622 | static void __exit ibmveth_module_exit(void) | |
1623 | { | |
1624 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1625 | } |
1da177e4 LT |
1626 | |
1627 | module_init(ibmveth_module_init); | |
1628 | module_exit(ibmveth_module_exit); |