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 | { | |
0b536be7 | 109 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); |
79ef4a4d BK |
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 | { | |
0b536be7 | 135 | return be32_to_cpu(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 | 558 | adapter->rx_queue.queue_addr = |
d0320f75 JP |
559 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
560 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
f148f61d | 561 | if (!adapter->rx_queue.queue_addr) { |
88426f2a DK |
562 | rc = -ENOMEM; |
563 | goto err_out; | |
1da177e4 LT |
564 | } |
565 | ||
8d8bb39b | 566 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 567 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 568 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 569 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
1da177e4 | 570 | |
8d8bb39b | 571 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
d90c92fe | 572 | (dma_mapping_error(dev, adapter->filter_list_dma))) { |
21c2dece SL |
573 | netdev_err(netdev, "unable to map filter or buffer list " |
574 | "pages\n"); | |
88426f2a DK |
575 | rc = -ENOMEM; |
576 | goto err_out; | |
1da177e4 LT |
577 | } |
578 | ||
579 | adapter->rx_queue.index = 0; | |
580 | adapter->rx_queue.num_slots = rxq_entries; | |
581 | adapter->rx_queue.toggle = 1; | |
582 | ||
1da177e4 LT |
583 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
584 | mac_address = mac_address >> 16; | |
585 | ||
f148f61d SL |
586 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
587 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
588 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
589 | ||
c43ced18 SL |
590 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
591 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
592 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 593 | |
4347ef15 SL |
594 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
595 | ||
bbedefcc | 596 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 597 | |
f148f61d | 598 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
599 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
600 | lpar_rc); | |
601 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
602 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
603 | adapter->buffer_list_dma, |
604 | adapter->filter_list_dma, | |
605 | rxq_desc.desc, | |
606 | mac_address); | |
88426f2a DK |
607 | rc = -ENONET; |
608 | goto err_out; | |
1da177e4 LT |
609 | } |
610 | ||
f148f61d SL |
611 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
612 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
613 | continue; |
614 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 615 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 616 | adapter->rx_buff_pool[i].active = 0; |
88426f2a DK |
617 | rc = -ENOMEM; |
618 | goto err_out; | |
860f242e SL |
619 | } |
620 | } | |
621 | ||
c43ced18 | 622 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
623 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
624 | netdev); | |
625 | if (rc != 0) { | |
21c2dece SL |
626 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
627 | netdev->irq, rc); | |
1da177e4 | 628 | do { |
95de86cf BK |
629 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
630 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 631 | |
88426f2a | 632 | goto err_out; |
1da177e4 LT |
633 | } |
634 | ||
1096d63d RJ |
635 | adapter->bounce_buffer = |
636 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
637 | if (!adapter->bounce_buffer) { | |
88426f2a | 638 | rc = -ENOMEM; |
e0e8ab59 | 639 | goto err_out_free_irq; |
1096d63d RJ |
640 | } |
641 | adapter->bounce_buffer_dma = | |
642 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
643 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 644 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 645 | netdev_err(netdev, "unable to map bounce buffer\n"); |
88426f2a | 646 | rc = -ENOMEM; |
e0e8ab59 | 647 | goto err_out_free_irq; |
1096d63d RJ |
648 | } |
649 | ||
c43ced18 | 650 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 651 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 652 | |
e2adbcb4 | 653 | netif_start_queue(netdev); |
1da177e4 | 654 | |
c43ced18 | 655 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
656 | |
657 | return 0; | |
88426f2a | 658 | |
e0e8ab59 DK |
659 | err_out_free_irq: |
660 | free_irq(netdev->irq, netdev); | |
88426f2a DK |
661 | err_out: |
662 | ibmveth_cleanup(adapter); | |
663 | napi_disable(&adapter->napi); | |
664 | return rc; | |
1da177e4 LT |
665 | } |
666 | ||
667 | static int ibmveth_close(struct net_device *netdev) | |
668 | { | |
4cf1653a | 669 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 670 | long lpar_rc; |
d7fbeba6 | 671 | |
c43ced18 | 672 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 673 | |
bea3348e SH |
674 | napi_disable(&adapter->napi); |
675 | ||
860f242e SL |
676 | if (!adapter->pool_config) |
677 | netif_stop_queue(netdev); | |
1da177e4 | 678 | |
ee2e6114 | 679 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 680 | |
1da177e4 LT |
681 | do { |
682 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 683 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 684 | |
f148f61d | 685 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
686 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
687 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
688 | } |
689 | ||
ee2e6114 RJ |
690 | free_irq(netdev->irq, netdev); |
691 | ||
f148f61d SL |
692 | adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) + |
693 | 4096 - 8); | |
1da177e4 LT |
694 | |
695 | ibmveth_cleanup(adapter); | |
696 | ||
c43ced18 | 697 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
f148f61d SL |
702 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
703 | { | |
704 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | | |
705 | SUPPORTED_FIBRE); | |
706 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | | |
707 | ADVERTISED_FIBRE); | |
70739497 | 708 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
1da177e4 LT |
709 | cmd->duplex = DUPLEX_FULL; |
710 | cmd->port = PORT_FIBRE; | |
711 | cmd->phy_address = 0; | |
712 | cmd->transceiver = XCVR_INTERNAL; | |
713 | cmd->autoneg = AUTONEG_ENABLE; | |
714 | cmd->maxtxpkt = 0; | |
715 | cmd->maxrxpkt = 1; | |
716 | return 0; | |
717 | } | |
718 | ||
f148f61d SL |
719 | static void netdev_get_drvinfo(struct net_device *dev, |
720 | struct ethtool_drvinfo *info) | |
721 | { | |
7826d43f JP |
722 | strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
723 | strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); | |
1da177e4 LT |
724 | } |
725 | ||
c8f44aff MM |
726 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
727 | netdev_features_t features) | |
5fc7e01c | 728 | { |
b9367bf3 MM |
729 | /* |
730 | * Since the ibmveth firmware interface does not have the | |
731 | * concept of separate tx/rx checksum offload enable, if rx | |
732 | * checksum is disabled we also have to disable tx checksum | |
733 | * offload. Once we disable rx checksum offload, we are no | |
734 | * longer allowed to send tx buffers that are not properly | |
735 | * checksummed. | |
736 | */ | |
5fc7e01c | 737 | |
b9367bf3 MM |
738 | if (!(features & NETIF_F_RXCSUM)) |
739 | features &= ~NETIF_F_ALL_CSUM; | |
5fc7e01c | 740 | |
b9367bf3 | 741 | return features; |
5fc7e01c BK |
742 | } |
743 | ||
b9367bf3 | 744 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 745 | { |
4cf1653a | 746 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 747 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 748 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 749 | long ret, ret4, ret6; |
5fc7e01c BK |
750 | int rc1 = 0, rc2 = 0; |
751 | int restart = 0; | |
752 | ||
753 | if (netif_running(dev)) { | |
754 | restart = 1; | |
755 | adapter->pool_config = 1; | |
756 | ibmveth_close(dev); | |
757 | adapter->pool_config = 0; | |
758 | } | |
759 | ||
79ef4a4d BK |
760 | set_attr = 0; |
761 | clr_attr = 0; | |
fb82fd20 AB |
762 | set_attr6 = 0; |
763 | clr_attr6 = 0; | |
5fc7e01c | 764 | |
ab78df75 | 765 | if (data) { |
79ef4a4d | 766 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
767 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
768 | } else { | |
79ef4a4d | 769 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
770 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
771 | } | |
5fc7e01c | 772 | |
79ef4a4d | 773 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 774 | |
79ef4a4d BK |
775 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
776 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
777 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
fb82fd20 | 778 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 779 | set_attr, &ret_attr); |
5fc7e01c | 780 | |
fb82fd20 | 781 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
782 | netdev_err(dev, "unable to change IPv4 checksum " |
783 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
784 | data, ret4); |
785 | ||
786 | h_illan_attributes(adapter->vdev->unit_address, | |
787 | set_attr, clr_attr, &ret_attr); | |
788 | ||
789 | if (data == 1) | |
790 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 791 | |
f148f61d | 792 | } else { |
ab78df75 | 793 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 794 | } |
ab78df75 SL |
795 | |
796 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
797 | clr_attr6, set_attr6, &ret_attr); | |
798 | ||
799 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
800 | netdev_err(dev, "unable to change IPv6 checksum " |
801 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
802 | data, ret6); |
803 | ||
804 | h_illan_attributes(adapter->vdev->unit_address, | |
805 | set_attr6, clr_attr6, &ret_attr); | |
806 | ||
807 | if (data == 1) | |
808 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 809 | |
ab78df75 SL |
810 | } else |
811 | adapter->fw_ipv6_csum_support = data; | |
812 | ||
fb82fd20 | 813 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 814 | adapter->rx_csum = data; |
ab78df75 SL |
815 | else |
816 | rc1 = -EIO; | |
5fc7e01c BK |
817 | } else { |
818 | rc1 = -EIO; | |
21c2dece SL |
819 | netdev_err(dev, "unable to change checksum offload settings." |
820 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
821 | ret_attr); | |
5fc7e01c BK |
822 | } |
823 | ||
824 | if (restart) | |
825 | rc2 = ibmveth_open(dev); | |
826 | ||
827 | return rc1 ? rc1 : rc2; | |
828 | } | |
829 | ||
c8f44aff MM |
830 | static int ibmveth_set_features(struct net_device *dev, |
831 | netdev_features_t features) | |
5fc7e01c | 832 | { |
4cf1653a | 833 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 MM |
834 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
835 | int rc; | |
5fc7e01c | 836 | |
b9367bf3 | 837 | if (rx_csum == adapter->rx_csum) |
5fc7e01c BK |
838 | return 0; |
839 | ||
b9367bf3 MM |
840 | rc = ibmveth_set_csum_offload(dev, rx_csum); |
841 | if (rc && !adapter->rx_csum) | |
842 | dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM); | |
5fc7e01c BK |
843 | |
844 | return rc; | |
845 | } | |
846 | ||
ddbb4de9 BK |
847 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
848 | { | |
849 | int i; | |
850 | ||
851 | if (stringset != ETH_SS_STATS) | |
852 | return; | |
853 | ||
854 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
855 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
856 | } | |
857 | ||
b9f2c044 | 858 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 859 | { |
b9f2c044 JG |
860 | switch (sset) { |
861 | case ETH_SS_STATS: | |
862 | return ARRAY_SIZE(ibmveth_stats); | |
863 | default: | |
864 | return -EOPNOTSUPP; | |
865 | } | |
ddbb4de9 BK |
866 | } |
867 | ||
868 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
869 | struct ethtool_stats *stats, u64 *data) | |
870 | { | |
871 | int i; | |
4cf1653a | 872 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
873 | |
874 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
875 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
876 | } | |
877 | ||
7282d491 | 878 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
879 | .get_drvinfo = netdev_get_drvinfo, |
880 | .get_settings = netdev_get_settings, | |
ed4ba4b5 | 881 | .get_link = ethtool_op_get_link, |
ddbb4de9 | 882 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 883 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 884 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
1da177e4 LT |
885 | }; |
886 | ||
887 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
888 | { | |
889 | return -EOPNOTSUPP; | |
890 | } | |
891 | ||
892 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
893 | ||
6e8ab30e SL |
894 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
895 | union ibmveth_buf_desc *descs) | |
1da177e4 | 896 | { |
1da177e4 LT |
897 | unsigned long correlator; |
898 | unsigned int retry_count; | |
6e8ab30e SL |
899 | unsigned long ret; |
900 | ||
901 | /* | |
902 | * The retry count sets a maximum for the number of broadcast and | |
903 | * multicast destinations within the system. | |
904 | */ | |
905 | retry_count = 1024; | |
906 | correlator = 0; | |
907 | do { | |
908 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
909 | descs[0].desc, descs[1].desc, | |
910 | descs[2].desc, descs[3].desc, | |
911 | descs[4].desc, descs[5].desc, | |
912 | correlator, &correlator); | |
913 | } while ((ret == H_BUSY) && (retry_count--)); | |
914 | ||
915 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
916 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
917 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
918 | return 1; |
919 | } | |
920 | ||
921 | return 0; | |
922 | } | |
60296d9e | 923 | |
6e8ab30e SL |
924 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
925 | struct net_device *netdev) | |
926 | { | |
927 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
928 | unsigned int desc_flags; | |
929 | union ibmveth_buf_desc descs[6]; | |
930 | int last, i; | |
931 | int force_bounce = 0; | |
b93da27f | 932 | dma_addr_t dma_addr; |
6e8ab30e SL |
933 | |
934 | /* | |
935 | * veth handles a maximum of 6 segments including the header, so | |
936 | * we have to linearize the skb if there are more than this. | |
937 | */ | |
938 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
939 | netdev->stats.tx_dropped++; | |
940 | goto out; | |
941 | } | |
1da177e4 | 942 | |
6e8ab30e | 943 | /* veth can't checksum offload UDP */ |
f4ff2872 | 944 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
945 | ((skb->protocol == htons(ETH_P_IP) && |
946 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
947 | (skb->protocol == htons(ETH_P_IPV6) && | |
948 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
949 | skb_checksum_help(skb)) { | |
950 | ||
21c2dece | 951 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 952 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
953 | goto out; |
954 | } | |
955 | ||
6e8ab30e SL |
956 | desc_flags = IBMVETH_BUF_VALID; |
957 | ||
f4ff2872 | 958 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
959 | unsigned char *buf = skb_transport_header(skb) + |
960 | skb->csum_offset; | |
f4ff2872 | 961 | |
6e8ab30e | 962 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
963 | |
964 | /* Need to zero out the checksum */ | |
965 | buf[0] = 0; | |
966 | buf[1] = 0; | |
967 | } | |
968 | ||
6e8ab30e SL |
969 | retry_bounce: |
970 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 971 | |
6e8ab30e SL |
972 | /* |
973 | * If a linear packet is below the rx threshold then | |
974 | * copy it into the static bounce buffer. This avoids the | |
975 | * cost of a TCE insert and remove. | |
976 | */ | |
977 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
978 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
979 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
980 | skb->len); | |
1da177e4 | 981 | |
6e8ab30e SL |
982 | descs[0].fields.flags_len = desc_flags | skb->len; |
983 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
984 | ||
985 | if (ibmveth_send(adapter, descs)) { | |
986 | adapter->tx_send_failed++; | |
987 | netdev->stats.tx_dropped++; | |
988 | } else { | |
989 | netdev->stats.tx_packets++; | |
990 | netdev->stats.tx_bytes += skb->len; | |
991 | } | |
992 | ||
993 | goto out; | |
994 | } | |
995 | ||
996 | /* Map the header */ | |
b93da27f AB |
997 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
998 | skb_headlen(skb), DMA_TO_DEVICE); | |
999 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
6e8ab30e SL |
1000 | goto map_failed; |
1001 | ||
1002 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
b93da27f | 1003 | descs[0].fields.address = dma_addr; |
6e8ab30e SL |
1004 | |
1005 | /* Map the frags */ | |
1006 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 1007 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
6e8ab30e | 1008 | |
8838a538 | 1009 | dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
9e903e08 | 1010 | skb_frag_size(frag), DMA_TO_DEVICE); |
6e8ab30e SL |
1011 | |
1012 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1013 | goto map_failed_frags; | |
1014 | ||
9e903e08 | 1015 | descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
6e8ab30e SL |
1016 | descs[i+1].fields.address = dma_addr; |
1017 | } | |
1018 | ||
1019 | if (ibmveth_send(adapter, descs)) { | |
1020 | adapter->tx_send_failed++; | |
1021 | netdev->stats.tx_dropped++; | |
1da177e4 | 1022 | } else { |
6e8ab30e SL |
1023 | netdev->stats.tx_packets++; |
1024 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1025 | } |
1026 | ||
33a48ab1 BK |
1027 | dma_unmap_single(&adapter->vdev->dev, |
1028 | descs[0].fields.address, | |
1029 | descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1030 | DMA_TO_DEVICE); | |
1031 | ||
1032 | for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) | |
6e8ab30e SL |
1033 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, |
1034 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1035 | DMA_TO_DEVICE); | |
1da177e4 | 1036 | |
e8cb7eb4 | 1037 | out: |
1da177e4 | 1038 | dev_kfree_skb(skb); |
6ed10654 | 1039 | return NETDEV_TX_OK; |
6e8ab30e SL |
1040 | |
1041 | map_failed_frags: | |
1042 | last = i+1; | |
1043 | for (i = 0; i < last; i++) | |
1044 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1045 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1046 | DMA_TO_DEVICE); | |
1047 | ||
1048 | map_failed: | |
1049 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1050 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e SL |
1051 | adapter->tx_map_failed++; |
1052 | skb_linearize(skb); | |
1053 | force_bounce = 1; | |
1054 | goto retry_bounce; | |
1da177e4 LT |
1055 | } |
1056 | ||
bea3348e | 1057 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1058 | { |
f148f61d SL |
1059 | struct ibmveth_adapter *adapter = |
1060 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1061 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1062 | int frames_processed = 0; |
1da177e4 LT |
1063 | unsigned long lpar_rc; |
1064 | ||
f148f61d | 1065 | restart_poll: |
1da177e4 | 1066 | do { |
bea3348e SH |
1067 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1068 | break; | |
1da177e4 | 1069 | |
f89e49e7 | 1070 | smp_rmb(); |
bea3348e SH |
1071 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1072 | wmb(); /* suggested by larson1 */ | |
1073 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1074 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1075 | ibmveth_rxq_recycle_buffer(adapter); |
1076 | } else { | |
8d86c61a | 1077 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1078 | int length = ibmveth_rxq_frame_length(adapter); |
1079 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1080 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1081 | ||
bea3348e | 1082 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1083 | |
8d86c61a SL |
1084 | new_skb = NULL; |
1085 | if (length < rx_copybreak) | |
1086 | new_skb = netdev_alloc_skb(netdev, length); | |
1087 | ||
1088 | if (new_skb) { | |
1089 | skb_copy_to_linear_data(new_skb, | |
1090 | skb->data + offset, | |
1091 | length); | |
0c26b677 SL |
1092 | if (rx_flush) |
1093 | ibmveth_flush_buffer(skb->data, | |
1094 | length + offset); | |
c6f59d13 AB |
1095 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1096 | kfree_skb(skb); | |
8d86c61a | 1097 | skb = new_skb; |
8d86c61a SL |
1098 | } else { |
1099 | ibmveth_rxq_harvest_buffer(adapter); | |
1100 | skb_reserve(skb, offset); | |
1101 | } | |
1da177e4 | 1102 | |
bea3348e SH |
1103 | skb_put(skb, length); |
1104 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1105 | |
8d86c61a SL |
1106 | if (csum_good) |
1107 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1108 | ||
bea3348e | 1109 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1110 | |
09f75cd7 JG |
1111 | netdev->stats.rx_packets++; |
1112 | netdev->stats.rx_bytes += length; | |
bea3348e | 1113 | frames_processed++; |
1da177e4 | 1114 | } |
bea3348e | 1115 | } while (frames_processed < budget); |
1da177e4 | 1116 | |
e2adbcb4 | 1117 | ibmveth_replenish_task(adapter); |
1da177e4 | 1118 | |
bea3348e SH |
1119 | if (frames_processed < budget) { |
1120 | /* We think we are done - reenable interrupts, | |
1121 | * then check once more to make sure we are done. | |
1122 | */ | |
1123 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1124 | VIO_IRQ_ENABLE); | |
1da177e4 | 1125 | |
6485911a | 1126 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1127 | |
288379f0 | 1128 | napi_complete(napi); |
1da177e4 | 1129 | |
bea3348e | 1130 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1131 | napi_reschedule(napi)) { |
bea3348e SH |
1132 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1133 | VIO_IRQ_DISABLE); | |
1134 | goto restart_poll; | |
1135 | } | |
1da177e4 LT |
1136 | } |
1137 | ||
bea3348e | 1138 | return frames_processed; |
1da177e4 LT |
1139 | } |
1140 | ||
7d12e780 | 1141 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1142 | { |
1da177e4 | 1143 | struct net_device *netdev = dev_instance; |
4cf1653a | 1144 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1145 | unsigned long lpar_rc; |
1146 | ||
288379f0 | 1147 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1148 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1149 | VIO_IRQ_DISABLE); | |
6485911a | 1150 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1151 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1152 | } |
1153 | return IRQ_HANDLED; | |
1154 | } | |
1155 | ||
1da177e4 LT |
1156 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1157 | { | |
4cf1653a | 1158 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1159 | unsigned long lpar_rc; |
1160 | ||
4cd24eaf JP |
1161 | if ((netdev->flags & IFF_PROMISC) || |
1162 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1163 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1164 | IbmVethMcastEnableRecv | | |
1165 | IbmVethMcastDisableFiltering, | |
1166 | 0); | |
f148f61d | 1167 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1168 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1169 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1170 | } |
1171 | } else { | |
22bedad3 | 1172 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1173 | /* clear the filter table & disable filtering */ |
1174 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1175 | IbmVethMcastEnableRecv | | |
1176 | IbmVethMcastDisableFiltering | | |
1177 | IbmVethMcastClearFilterTable, | |
1178 | 0); | |
f148f61d | 1179 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1180 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1181 | "attempting to clear filter table\n", | |
1182 | lpar_rc); | |
1da177e4 LT |
1183 | } |
1184 | /* add the addresses to the filter table */ | |
22bedad3 | 1185 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1186 | /* add the multicast address to the filter table */ |
1da177e4 | 1187 | unsigned long mcast_addr = 0; |
d458cdf7 | 1188 | memcpy(((char *)&mcast_addr)+2, ha->addr, ETH_ALEN); |
1da177e4 LT |
1189 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1190 | IbmVethMcastAddFilter, | |
1191 | mcast_addr); | |
f148f61d | 1192 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1193 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1194 | "when adding an entry to the filter " | |
1195 | "table\n", lpar_rc); | |
1da177e4 LT |
1196 | } |
1197 | } | |
d7fbeba6 | 1198 | |
1da177e4 LT |
1199 | /* re-enable filtering */ |
1200 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1201 | IbmVethMcastEnableFiltering, | |
1202 | 0); | |
f148f61d | 1203 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1204 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1205 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1206 | } |
1207 | } | |
1208 | } | |
1209 | ||
1210 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1211 | { | |
4cf1653a | 1212 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1213 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1214 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1215 | int i, rc; |
1216 | int need_restart = 0; | |
b6d35182 | 1217 | |
517e80e6 | 1218 | if (new_mtu < IBMVETH_MIN_MTU) |
1da177e4 | 1219 | return -EINVAL; |
b6d35182 | 1220 | |
517e80e6 | 1221 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
ce6eea58 BK |
1222 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) |
1223 | break; | |
1224 | ||
517e80e6 | 1225 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1226 | return -EINVAL; |
1227 | ||
ea866e65 SL |
1228 | /* Deactivate all the buffer pools so that the next loop can activate |
1229 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1230 | if (netif_running(adapter->netdev)) { |
1231 | need_restart = 1; | |
1232 | adapter->pool_config = 1; | |
1233 | ibmveth_close(adapter->netdev); | |
1234 | adapter->pool_config = 0; | |
1235 | } | |
ea866e65 | 1236 | |
860f242e | 1237 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1238 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1239 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1240 | |
860f242e | 1241 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1242 | dev->mtu = new_mtu; |
1243 | vio_cmo_set_dev_desired(viodev, | |
1244 | ibmveth_get_desired_dma | |
1245 | (viodev)); | |
0645bab7 RJ |
1246 | if (need_restart) { |
1247 | return ibmveth_open(adapter->netdev); | |
1248 | } | |
860f242e | 1249 | return 0; |
b6d35182 | 1250 | } |
b6d35182 | 1251 | } |
0645bab7 RJ |
1252 | |
1253 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1254 | return rc; | |
1255 | ||
860f242e | 1256 | return -EINVAL; |
1da177e4 LT |
1257 | } |
1258 | ||
6b422374 SL |
1259 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1260 | static void ibmveth_poll_controller(struct net_device *dev) | |
1261 | { | |
4cf1653a | 1262 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1263 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1264 | } |
1265 | #endif | |
1266 | ||
1096d63d RJ |
1267 | /** |
1268 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1269 | * | |
1270 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1271 | * | |
1272 | * Return value: | |
1273 | * Number of bytes of IO data the driver will need to perform well. | |
1274 | */ | |
1275 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1276 | { | |
1277 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1278 | struct ibmveth_adapter *adapter; | |
1279 | unsigned long ret; | |
1280 | int i; | |
1281 | int rxqentries = 1; | |
1282 | ||
1283 | /* netdev inits at probe time along with the structures we need below*/ | |
1284 | if (netdev == NULL) | |
1285 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1286 | ||
1287 | adapter = netdev_priv(netdev); | |
1288 | ||
1289 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1290 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1291 | ||
517e80e6 | 1292 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1293 | /* add the size of the active receive buffers */ |
1294 | if (adapter->rx_buff_pool[i].active) | |
1295 | ret += | |
1296 | adapter->rx_buff_pool[i].size * | |
1297 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1298 | buff_size); | |
1299 | rxqentries += adapter->rx_buff_pool[i].size; | |
1300 | } | |
1301 | /* add the size of the receive queue entries */ | |
1302 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1303 | ||
1304 | return ret; | |
1305 | } | |
1306 | ||
e186d174 AB |
1307 | static const struct net_device_ops ibmveth_netdev_ops = { |
1308 | .ndo_open = ibmveth_open, | |
1309 | .ndo_stop = ibmveth_close, | |
1310 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1311 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
e186d174 AB |
1312 | .ndo_do_ioctl = ibmveth_ioctl, |
1313 | .ndo_change_mtu = ibmveth_change_mtu, | |
b9367bf3 MM |
1314 | .ndo_fix_features = ibmveth_fix_features, |
1315 | .ndo_set_features = ibmveth_set_features, | |
e186d174 AB |
1316 | .ndo_validate_addr = eth_validate_addr, |
1317 | .ndo_set_mac_address = eth_mac_addr, | |
1318 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1319 | .ndo_poll_controller = ibmveth_poll_controller, | |
1320 | #endif | |
1321 | }; | |
1322 | ||
1dd06ae8 | 1323 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1324 | { |
13f85203 | 1325 | int rc, i, mac_len; |
1da177e4 | 1326 | struct net_device *netdev; |
9dc83afd | 1327 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1328 | unsigned char *mac_addr_p; |
1329 | unsigned int *mcastFilterSize_p; | |
1330 | ||
c43ced18 SL |
1331 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1332 | dev->unit_address); | |
1da177e4 | 1333 | |
f148f61d | 1334 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
13f85203 | 1335 | &mac_len); |
f148f61d | 1336 | if (!mac_addr_p) { |
21c2dece | 1337 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1338 | return -EINVAL; |
1da177e4 | 1339 | } |
13f85203 BH |
1340 | /* Workaround for old/broken pHyp */ |
1341 | if (mac_len == 8) | |
1342 | mac_addr_p += 2; | |
1343 | else if (mac_len != 6) { | |
1344 | dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", | |
1345 | mac_len); | |
1346 | return -EINVAL; | |
1347 | } | |
d7fbeba6 | 1348 | |
f148f61d | 1349 | mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, |
493a684a | 1350 | VETH_MCAST_FILTER_SIZE, NULL); |
f148f61d | 1351 | if (!mcastFilterSize_p) { |
21c2dece SL |
1352 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1353 | "attribute\n"); | |
be35ae9e | 1354 | return -EINVAL; |
1da177e4 | 1355 | } |
d7fbeba6 | 1356 | |
1da177e4 LT |
1357 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1358 | ||
f148f61d | 1359 | if (!netdev) |
1da177e4 LT |
1360 | return -ENOMEM; |
1361 | ||
4cf1653a | 1362 | adapter = netdev_priv(netdev); |
c7ae011d | 1363 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1364 | |
1365 | adapter->vdev = dev; | |
1366 | adapter->netdev = netdev; | |
f148f61d | 1367 | adapter->mcastFilterSize = *mcastFilterSize_p; |
860f242e | 1368 | adapter->pool_config = 0; |
d7fbeba6 | 1369 | |
bea3348e SH |
1370 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1371 | ||
1da177e4 | 1372 | adapter->mac_addr = 0; |
d458cdf7 | 1373 | memcpy(&adapter->mac_addr, mac_addr_p, ETH_ALEN); |
1da177e4 | 1374 | |
1da177e4 | 1375 | netdev->irq = dev->irq; |
e186d174 AB |
1376 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1377 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1378 | SET_NETDEV_DEV(netdev, &dev->dev); |
b9367bf3 MM |
1379 | netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | |
1380 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
1381 | netdev->features |= netdev->hw_features; | |
1da177e4 | 1382 | |
d44b5e07 | 1383 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1384 | |
f148f61d | 1385 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1386 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1387 | int error; |
1388 | ||
d7fbeba6 JG |
1389 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1390 | pool_count[i], pool_size[i], | |
860f242e | 1391 | pool_active[i]); |
8dde2a96 GKH |
1392 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1393 | &dev->dev.kobj, "pool%d", i); | |
1394 | if (!error) | |
1395 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1396 | } |
1da177e4 | 1397 | |
c43ced18 | 1398 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1399 | |
1da177e4 LT |
1400 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1401 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1402 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1403 | ||
c43ced18 | 1404 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1405 | |
b801a4e7 MM |
1406 | ibmveth_set_features(netdev, netdev->features); |
1407 | ||
1da177e4 LT |
1408 | rc = register_netdev(netdev); |
1409 | ||
f148f61d | 1410 | if (rc) { |
c43ced18 | 1411 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1412 | free_netdev(netdev); |
1413 | return rc; | |
1414 | } | |
1415 | ||
c43ced18 | 1416 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1417 | |
1da177e4 LT |
1418 | return 0; |
1419 | } | |
1420 | ||
e11787a2 | 1421 | static int ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1422 | { |
c7ae011d | 1423 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1424 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1425 | int i; |
1426 | ||
f148f61d | 1427 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1428 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1429 | |
1430 | unregister_netdev(netdev); | |
1431 | ||
1da177e4 | 1432 | free_netdev(netdev); |
1096d63d RJ |
1433 | dev_set_drvdata(&dev->dev, NULL); |
1434 | ||
1da177e4 LT |
1435 | return 0; |
1436 | } | |
1437 | ||
860f242e SL |
1438 | static struct attribute veth_active_attr; |
1439 | static struct attribute veth_num_attr; | |
1440 | static struct attribute veth_size_attr; | |
1441 | ||
f148f61d SL |
1442 | static ssize_t veth_pool_show(struct kobject *kobj, |
1443 | struct attribute *attr, char *buf) | |
860f242e | 1444 | { |
d7fbeba6 | 1445 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1446 | struct ibmveth_buff_pool, |
1447 | kobj); | |
1448 | ||
1449 | if (attr == &veth_active_attr) | |
1450 | return sprintf(buf, "%d\n", pool->active); | |
1451 | else if (attr == &veth_num_attr) | |
1452 | return sprintf(buf, "%d\n", pool->size); | |
1453 | else if (attr == &veth_size_attr) | |
1454 | return sprintf(buf, "%d\n", pool->buff_size); | |
1455 | return 0; | |
1456 | } | |
1457 | ||
f148f61d SL |
1458 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1459 | const char *buf, size_t count) | |
860f242e | 1460 | { |
d7fbeba6 | 1461 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1462 | struct ibmveth_buff_pool, |
1463 | kobj); | |
c7ae011d GKH |
1464 | struct net_device *netdev = dev_get_drvdata( |
1465 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1466 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1467 | long value = simple_strtol(buf, NULL, 10); |
1468 | long rc; | |
1469 | ||
1470 | if (attr == &veth_active_attr) { | |
1471 | if (value && !pool->active) { | |
4aa9c93e | 1472 | if (netif_running(netdev)) { |
f148f61d | 1473 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1474 | netdev_err(netdev, |
1475 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1476 | return -ENOMEM; |
1477 | } | |
1478 | pool->active = 1; | |
1479 | adapter->pool_config = 1; | |
1480 | ibmveth_close(netdev); | |
1481 | adapter->pool_config = 0; | |
1482 | if ((rc = ibmveth_open(netdev))) | |
1483 | return rc; | |
f148f61d | 1484 | } else { |
4aa9c93e | 1485 | pool->active = 1; |
f148f61d | 1486 | } |
860f242e SL |
1487 | } else if (!value && pool->active) { |
1488 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1489 | int i; | |
1490 | /* Make sure there is a buffer pool with buffers that | |
1491 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1492 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1493 | if (pool == &adapter->rx_buff_pool[i]) |
1494 | continue; | |
1495 | if (!adapter->rx_buff_pool[i].active) | |
1496 | continue; | |
76b9cfcc BK |
1497 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1498 | break; | |
860f242e | 1499 | } |
76b9cfcc | 1500 | |
517e80e6 | 1501 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1502 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1503 | return -EPERM; |
1504 | } | |
76b9cfcc | 1505 | |
76b9cfcc BK |
1506 | if (netif_running(netdev)) { |
1507 | adapter->pool_config = 1; | |
1508 | ibmveth_close(netdev); | |
ea866e65 | 1509 | pool->active = 0; |
76b9cfcc BK |
1510 | adapter->pool_config = 0; |
1511 | if ((rc = ibmveth_open(netdev))) | |
1512 | return rc; | |
1513 | } | |
ea866e65 | 1514 | pool->active = 0; |
860f242e SL |
1515 | } |
1516 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1517 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1518 | return -EINVAL; |
f148f61d | 1519 | } else { |
4aa9c93e BK |
1520 | if (netif_running(netdev)) { |
1521 | adapter->pool_config = 1; | |
1522 | ibmveth_close(netdev); | |
1523 | adapter->pool_config = 0; | |
1524 | pool->size = value; | |
1525 | if ((rc = ibmveth_open(netdev))) | |
1526 | return rc; | |
f148f61d | 1527 | } else { |
4aa9c93e | 1528 | pool->size = value; |
f148f61d | 1529 | } |
860f242e SL |
1530 | } |
1531 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1532 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1533 | return -EINVAL; |
f148f61d | 1534 | } else { |
4aa9c93e BK |
1535 | if (netif_running(netdev)) { |
1536 | adapter->pool_config = 1; | |
1537 | ibmveth_close(netdev); | |
1538 | adapter->pool_config = 0; | |
1539 | pool->buff_size = value; | |
1540 | if ((rc = ibmveth_open(netdev))) | |
1541 | return rc; | |
f148f61d | 1542 | } else { |
4aa9c93e | 1543 | pool->buff_size = value; |
f148f61d | 1544 | } |
860f242e SL |
1545 | } |
1546 | } | |
1547 | ||
1548 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1549 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1550 | return count; |
1551 | } | |
1552 | ||
1553 | ||
f148f61d SL |
1554 | #define ATTR(_name, _mode) \ |
1555 | struct attribute veth_##_name##_attr = { \ | |
1556 | .name = __stringify(_name), .mode = _mode, \ | |
1557 | }; | |
860f242e SL |
1558 | |
1559 | static ATTR(active, 0644); | |
1560 | static ATTR(num, 0644); | |
1561 | static ATTR(size, 0644); | |
1562 | ||
f148f61d | 1563 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1564 | &veth_active_attr, |
1565 | &veth_num_attr, | |
1566 | &veth_size_attr, | |
1567 | NULL, | |
1568 | }; | |
1569 | ||
52cf25d0 | 1570 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1571 | .show = veth_pool_show, |
1572 | .store = veth_pool_store, | |
1573 | }; | |
1574 | ||
1575 | static struct kobj_type ktype_veth_pool = { | |
1576 | .release = NULL, | |
1577 | .sysfs_ops = &veth_pool_ops, | |
1578 | .default_attrs = veth_pool_attrs, | |
1579 | }; | |
1580 | ||
e7a3af5d BK |
1581 | static int ibmveth_resume(struct device *dev) |
1582 | { | |
1583 | struct net_device *netdev = dev_get_drvdata(dev); | |
1584 | ibmveth_interrupt(netdev->irq, netdev); | |
1585 | return 0; | |
1586 | } | |
860f242e | 1587 | |
e11787a2 | 1588 | static struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1589 | { "network", "IBM,l-lan"}, |
fb120da6 | 1590 | { "", "" } |
1da177e4 | 1591 | }; |
1da177e4 LT |
1592 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1593 | ||
e7a3af5d BK |
1594 | static struct dev_pm_ops ibmveth_pm_ops = { |
1595 | .resume = ibmveth_resume | |
1596 | }; | |
1597 | ||
1da177e4 | 1598 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1599 | .id_table = ibmveth_device_table, |
1600 | .probe = ibmveth_probe, | |
1601 | .remove = ibmveth_remove, | |
1096d63d | 1602 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1603 | .name = ibmveth_driver_name, |
1604 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1605 | }; |
1606 | ||
1607 | static int __init ibmveth_module_init(void) | |
1608 | { | |
21c2dece SL |
1609 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1610 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1611 | |
1da177e4 LT |
1612 | return vio_register_driver(&ibmveth_driver); |
1613 | } | |
1614 | ||
1615 | static void __exit ibmveth_module_exit(void) | |
1616 | { | |
1617 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1618 | } |
1da177e4 LT |
1619 | |
1620 | module_init(ibmveth_module_init); | |
1621 | module_exit(ibmveth_module_exit); |