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 | 14 | * You should have received a copy of the GNU General Public License |
0ab75ae8 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
f148f61d | 16 | * |
9d348af4 SL |
17 | * Copyright (C) IBM Corporation, 2003, 2010 |
18 | * | |
19 | * Authors: Dave Larson <larson1@us.ibm.com> | |
20 | * Santiago Leon <santil@linux.vnet.ibm.com> | |
21 | * Brian King <brking@linux.vnet.ibm.com> | |
22 | * Robert Jennings <rcj@linux.vnet.ibm.com> | |
23 | * Anton Blanchard <anton@au.ibm.com> | |
f148f61d | 24 | */ |
1da177e4 | 25 | |
1da177e4 | 26 | #include <linux/module.h> |
1096d63d | 27 | #include <linux/moduleparam.h> |
1da177e4 LT |
28 | #include <linux/types.h> |
29 | #include <linux/errno.h> | |
1da177e4 LT |
30 | #include <linux/dma-mapping.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/init.h> | |
a6b7a407 | 36 | #include <linux/interrupt.h> |
1da177e4 | 37 | #include <linux/mm.h> |
e7a3af5d | 38 | #include <linux/pm.h> |
1da177e4 | 39 | #include <linux/ethtool.h> |
f4ff2872 BK |
40 | #include <linux/in.h> |
41 | #include <linux/ip.h> | |
ab78df75 | 42 | #include <linux/ipv6.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
1da177e4 | 44 | #include <asm/hvcall.h> |
60063497 | 45 | #include <linux/atomic.h> |
1da177e4 | 46 | #include <asm/vio.h> |
1096d63d | 47 | #include <asm/iommu.h> |
1096d63d | 48 | #include <asm/firmware.h> |
1da177e4 LT |
49 | |
50 | #include "ibmveth.h" | |
51 | ||
7d12e780 | 52 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 53 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 54 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
e295fe83 | 55 | |
860f242e | 56 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 57 | |
1096d63d | 58 | |
1da177e4 | 59 | static const char ibmveth_driver_name[] = "ibmveth"; |
9d348af4 SL |
60 | static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; |
61 | #define ibmveth_driver_version "1.04" | |
1da177e4 | 62 | |
9d348af4 SL |
63 | MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>"); |
64 | MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); | |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | MODULE_VERSION(ibmveth_driver_version); | |
67 | ||
c08cc3cc SL |
68 | static unsigned int tx_copybreak __read_mostly = 128; |
69 | module_param(tx_copybreak, uint, 0644); | |
70 | MODULE_PARM_DESC(tx_copybreak, | |
71 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
72 | ||
8d86c61a SL |
73 | static unsigned int rx_copybreak __read_mostly = 128; |
74 | module_param(rx_copybreak, uint, 0644); | |
75 | MODULE_PARM_DESC(rx_copybreak, | |
76 | "Maximum size of packet that is copied to a new buffer on receive"); | |
77 | ||
0c26b677 SL |
78 | static unsigned int rx_flush __read_mostly = 0; |
79 | module_param(rx_flush, uint, 0644); | |
80 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
81 | ||
ddbb4de9 BK |
82 | struct ibmveth_stat { |
83 | char name[ETH_GSTRING_LEN]; | |
84 | int offset; | |
85 | }; | |
86 | ||
87 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
88 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
89 | ||
90 | struct ibmveth_stat ibmveth_stats[] = { | |
91 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
92 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
f148f61d SL |
93 | { "replenish_add_buff_failure", |
94 | IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
95 | { "replenish_add_buff_success", | |
96 | IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
ddbb4de9 BK |
97 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, |
98 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
99 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
100 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
101 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
102 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
ddbb4de9 BK |
103 | }; |
104 | ||
1da177e4 | 105 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
106 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
107 | { | |
0b536be7 | 108 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); |
79ef4a4d BK |
109 | } |
110 | ||
111 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
112 | { | |
f148f61d SL |
113 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> |
114 | IBMVETH_RXQ_TOGGLE_SHIFT; | |
79ef4a4d BK |
115 | } |
116 | ||
1da177e4 LT |
117 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
118 | { | |
f148f61d | 119 | return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; |
1da177e4 LT |
120 | } |
121 | ||
122 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
123 | { | |
f148f61d | 124 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; |
1da177e4 LT |
125 | } |
126 | ||
127 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
128 | { | |
f148f61d | 129 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; |
1da177e4 LT |
130 | } |
131 | ||
132 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
133 | { | |
0b536be7 | 134 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); |
1da177e4 LT |
135 | } |
136 | ||
f4ff2872 BK |
137 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
138 | { | |
f148f61d | 139 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; |
f4ff2872 BK |
140 | } |
141 | ||
1da177e4 | 142 | /* setup the initial settings for a buffer pool */ |
f148f61d SL |
143 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, |
144 | u32 pool_index, u32 pool_size, | |
145 | u32 buff_size, u32 pool_active) | |
1da177e4 LT |
146 | { |
147 | pool->size = pool_size; | |
148 | pool->index = pool_index; | |
149 | pool->buff_size = buff_size; | |
c033a6d1 | 150 | pool->threshold = pool_size * 7 / 8; |
860f242e | 151 | pool->active = pool_active; |
1da177e4 LT |
152 | } |
153 | ||
154 | /* allocate and setup an buffer pool - called during open */ | |
155 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
156 | { | |
157 | int i; | |
158 | ||
d7fbeba6 | 159 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 | 160 | |
f148f61d | 161 | if (!pool->free_map) |
1da177e4 | 162 | return -1; |
1da177e4 | 163 | |
d7fbeba6 | 164 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
f148f61d | 165 | if (!pool->dma_addr) { |
1da177e4 LT |
166 | kfree(pool->free_map); |
167 | pool->free_map = NULL; | |
168 | return -1; | |
169 | } | |
170 | ||
a05abcb5 | 171 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 | 172 | |
f148f61d | 173 | if (!pool->skbuff) { |
1da177e4 LT |
174 | kfree(pool->dma_addr); |
175 | pool->dma_addr = NULL; | |
176 | ||
177 | kfree(pool->free_map); | |
178 | pool->free_map = NULL; | |
179 | return -1; | |
180 | } | |
181 | ||
1da177e4 LT |
182 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
183 | ||
f148f61d | 184 | for (i = 0; i < pool->size; ++i) |
1da177e4 | 185 | pool->free_map[i] = i; |
1da177e4 LT |
186 | |
187 | atomic_set(&pool->available, 0); | |
188 | pool->producer_index = 0; | |
189 | pool->consumer_index = 0; | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
0c26b677 SL |
194 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
195 | { | |
196 | unsigned long offset; | |
197 | ||
198 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
199 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
200 | } | |
201 | ||
1da177e4 LT |
202 | /* replenish the buffers for a pool. note that we don't need to |
203 | * skb_reserve these since they are used for incoming... | |
204 | */ | |
f148f61d SL |
205 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, |
206 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
207 | { |
208 | u32 i; | |
209 | u32 count = pool->size - atomic_read(&pool->available); | |
210 | u32 buffers_added = 0; | |
1096d63d RJ |
211 | struct sk_buff *skb; |
212 | unsigned int free_index, index; | |
213 | u64 correlator; | |
214 | unsigned long lpar_rc; | |
215 | dma_addr_t dma_addr; | |
1da177e4 LT |
216 | |
217 | mb(); | |
218 | ||
f148f61d | 219 | for (i = 0; i < count; ++i) { |
1da177e4 | 220 | union ibmveth_buf_desc desc; |
1da177e4 | 221 | |
003212cc | 222 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 | 223 | |
f148f61d | 224 | if (!skb) { |
c43ced18 SL |
225 | netdev_dbg(adapter->netdev, |
226 | "replenish: unable to allocate skb\n"); | |
1da177e4 LT |
227 | adapter->replenish_no_mem++; |
228 | break; | |
229 | } | |
230 | ||
047a66d4 | 231 | free_index = pool->consumer_index; |
a613f581 SL |
232 | pool->consumer_index++; |
233 | if (pool->consumer_index >= pool->size) | |
234 | pool->consumer_index = 0; | |
1da177e4 | 235 | index = pool->free_map[free_index]; |
d7fbeba6 | 236 | |
6485911a SL |
237 | BUG_ON(index == IBM_VETH_INVALID_MAP); |
238 | BUG_ON(pool->skbuff[index] != NULL); | |
1da177e4 LT |
239 | |
240 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
241 | pool->buff_size, DMA_FROM_DEVICE); | |
242 | ||
c713e7cb | 243 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
244 | goto failure; |
245 | ||
1da177e4 LT |
246 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
247 | pool->dma_addr[index] = dma_addr; | |
248 | pool->skbuff[index] = skb; | |
249 | ||
250 | correlator = ((u64)pool->index << 32) | index; | |
f148f61d | 251 | *(u64 *)skb->data = correlator; |
1da177e4 | 252 | |
79ef4a4d | 253 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 254 | desc.fields.address = dma_addr; |
1da177e4 | 255 | |
0c26b677 SL |
256 | if (rx_flush) { |
257 | unsigned int len = min(pool->buff_size, | |
258 | adapter->netdev->mtu + | |
259 | IBMVETH_BUFF_OH); | |
260 | ibmveth_flush_buffer(skb->data, len); | |
261 | } | |
f148f61d SL |
262 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, |
263 | desc.desc); | |
d7fbeba6 | 264 | |
f148f61d | 265 | if (lpar_rc != H_SUCCESS) { |
1096d63d | 266 | goto failure; |
f148f61d | 267 | } else { |
1da177e4 LT |
268 | buffers_added++; |
269 | adapter->replenish_add_buff_success++; | |
270 | } | |
271 | } | |
d7fbeba6 | 272 | |
1096d63d RJ |
273 | mb(); |
274 | atomic_add(buffers_added, &(pool->available)); | |
275 | return; | |
276 | ||
277 | failure: | |
278 | pool->free_map[free_index] = index; | |
279 | pool->skbuff[index] = NULL; | |
280 | if (pool->consumer_index == 0) | |
281 | pool->consumer_index = pool->size - 1; | |
282 | else | |
283 | pool->consumer_index--; | |
c713e7cb | 284 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
285 | dma_unmap_single(&adapter->vdev->dev, |
286 | pool->dma_addr[index], pool->buff_size, | |
287 | DMA_FROM_DEVICE); | |
288 | dev_kfree_skb_any(skb); | |
289 | adapter->replenish_add_buff_failure++; | |
290 | ||
1da177e4 LT |
291 | mb(); |
292 | atomic_add(buffers_added, &(pool->available)); | |
293 | } | |
294 | ||
e2adbcb4 | 295 | /* replenish routine */ |
d7fbeba6 | 296 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 297 | { |
b6d35182 SL |
298 | int i; |
299 | ||
1da177e4 LT |
300 | adapter->replenish_task_cycles++; |
301 | ||
517e80e6 | 302 | for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { |
c033a6d1 SL |
303 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; |
304 | ||
305 | if (pool->active && | |
306 | (atomic_read(&pool->available) < pool->threshold)) | |
307 | ibmveth_replenish_buffer_pool(adapter, pool); | |
308 | } | |
1da177e4 | 309 | |
f148f61d SL |
310 | adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) + |
311 | 4096 - 8); | |
1da177e4 LT |
312 | } |
313 | ||
314 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
f148f61d SL |
315 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, |
316 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
317 | { |
318 | int i; | |
319 | ||
b4558ea9 JJ |
320 | kfree(pool->free_map); |
321 | pool->free_map = NULL; | |
1da177e4 | 322 | |
f148f61d SL |
323 | if (pool->skbuff && pool->dma_addr) { |
324 | for (i = 0; i < pool->size; ++i) { | |
1da177e4 | 325 | struct sk_buff *skb = pool->skbuff[i]; |
f148f61d | 326 | if (skb) { |
1da177e4 LT |
327 | dma_unmap_single(&adapter->vdev->dev, |
328 | pool->dma_addr[i], | |
329 | pool->buff_size, | |
330 | DMA_FROM_DEVICE); | |
331 | dev_kfree_skb_any(skb); | |
332 | pool->skbuff[i] = NULL; | |
333 | } | |
334 | } | |
335 | } | |
336 | ||
f148f61d | 337 | if (pool->dma_addr) { |
1da177e4 LT |
338 | kfree(pool->dma_addr); |
339 | pool->dma_addr = NULL; | |
340 | } | |
341 | ||
f148f61d | 342 | if (pool->skbuff) { |
1da177e4 LT |
343 | kfree(pool->skbuff); |
344 | pool->skbuff = NULL; | |
345 | } | |
346 | } | |
347 | ||
348 | /* remove a buffer from a pool */ | |
f148f61d SL |
349 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, |
350 | u64 correlator) | |
1da177e4 LT |
351 | { |
352 | unsigned int pool = correlator >> 32; | |
353 | unsigned int index = correlator & 0xffffffffUL; | |
354 | unsigned int free_index; | |
355 | struct sk_buff *skb; | |
356 | ||
6485911a SL |
357 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
358 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
359 | |
360 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
361 | ||
6485911a | 362 | BUG_ON(skb == NULL); |
1da177e4 LT |
363 | |
364 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
365 | ||
366 | dma_unmap_single(&adapter->vdev->dev, | |
367 | adapter->rx_buff_pool[pool].dma_addr[index], | |
368 | adapter->rx_buff_pool[pool].buff_size, | |
369 | DMA_FROM_DEVICE); | |
370 | ||
047a66d4 | 371 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
372 | adapter->rx_buff_pool[pool].producer_index++; |
373 | if (adapter->rx_buff_pool[pool].producer_index >= | |
374 | adapter->rx_buff_pool[pool].size) | |
375 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
376 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
377 | ||
378 | mb(); | |
379 | ||
380 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
381 | } | |
382 | ||
383 | /* get the current buffer on the rx queue */ | |
384 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
385 | { | |
386 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
387 | unsigned int pool = correlator >> 32; | |
388 | unsigned int index = correlator & 0xffffffffUL; | |
389 | ||
6485911a SL |
390 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
391 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
392 | |
393 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
394 | } | |
395 | ||
396 | /* recycle the current buffer on the rx queue */ | |
c6f59d13 | 397 | static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
398 | { |
399 | u32 q_index = adapter->rx_queue.index; | |
400 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
401 | unsigned int pool = correlator >> 32; | |
402 | unsigned int index = correlator & 0xffffffffUL; | |
403 | union ibmveth_buf_desc desc; | |
404 | unsigned long lpar_rc; | |
c6f59d13 | 405 | int ret = 1; |
1da177e4 | 406 | |
6485911a SL |
407 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
408 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 | 409 | |
f148f61d | 410 | if (!adapter->rx_buff_pool[pool].active) { |
b6d35182 SL |
411 | ibmveth_rxq_harvest_buffer(adapter); |
412 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
c6f59d13 | 413 | goto out; |
b6d35182 SL |
414 | } |
415 | ||
79ef4a4d BK |
416 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
417 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
418 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
419 | ||
420 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 421 | |
f148f61d | 422 | if (lpar_rc != H_SUCCESS) { |
c43ced18 SL |
423 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
424 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 | 425 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
c6f59d13 | 426 | ret = 0; |
1da177e4 LT |
427 | } |
428 | ||
f148f61d | 429 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
430 | adapter->rx_queue.index = 0; |
431 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
432 | } | |
c6f59d13 AB |
433 | |
434 | out: | |
435 | return ret; | |
1da177e4 LT |
436 | } |
437 | ||
493a684a | 438 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
439 | { |
440 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
441 | ||
f148f61d | 442 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
443 | adapter->rx_queue.index = 0; |
444 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
445 | } | |
446 | } | |
447 | ||
448 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
449 | { | |
b6d35182 | 450 | int i; |
8d8bb39b | 451 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 452 | |
f148f61d | 453 | if (adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
454 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
455 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
456 | DMA_BIDIRECTIONAL); |
457 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
458 | } | |
459 | free_page((unsigned long)adapter->buffer_list_addr); | |
460 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 461 | } |
1da177e4 | 462 | |
f148f61d | 463 | if (adapter->filter_list_addr != NULL) { |
8d8bb39b FT |
464 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
465 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
466 | DMA_BIDIRECTIONAL); |
467 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
468 | } | |
469 | free_page((unsigned long)adapter->filter_list_addr); | |
470 | adapter->filter_list_addr = NULL; | |
471 | } | |
472 | ||
f148f61d | 473 | if (adapter->rx_queue.queue_addr != NULL) { |
d90c92fe SL |
474 | dma_free_coherent(dev, adapter->rx_queue.queue_len, |
475 | adapter->rx_queue.queue_addr, | |
476 | adapter->rx_queue.queue_dma); | |
1da177e4 LT |
477 | adapter->rx_queue.queue_addr = NULL; |
478 | } | |
479 | ||
f148f61d | 480 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
860f242e | 481 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 482 | ibmveth_free_buffer_pool(adapter, |
860f242e | 483 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
484 | |
485 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 486 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
487 | dma_unmap_single(&adapter->vdev->dev, |
488 | adapter->bounce_buffer_dma, | |
489 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
490 | DMA_BIDIRECTIONAL); | |
491 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
492 | } | |
493 | kfree(adapter->bounce_buffer); | |
494 | adapter->bounce_buffer = NULL; | |
495 | } | |
1da177e4 LT |
496 | } |
497 | ||
bbedefcc ME |
498 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
499 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
500 | { | |
501 | int rc, try_again = 1; | |
502 | ||
f148f61d SL |
503 | /* |
504 | * After a kexec the adapter will still be open, so our attempt to | |
505 | * open it will fail. So if we get a failure we free the adapter and | |
506 | * try again, but only once. | |
507 | */ | |
bbedefcc ME |
508 | retry: |
509 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
510 | adapter->buffer_list_dma, rxq_desc.desc, | |
511 | adapter->filter_list_dma, mac_address); | |
512 | ||
513 | if (rc != H_SUCCESS && try_again) { | |
514 | do { | |
515 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
516 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
517 | ||
518 | try_again = 0; | |
519 | goto retry; | |
520 | } | |
521 | ||
522 | return rc; | |
523 | } | |
524 | ||
d746ca95 AB |
525 | static u64 ibmveth_encode_mac_addr(u8 *mac) |
526 | { | |
527 | int i; | |
528 | u64 encoded = 0; | |
529 | ||
530 | for (i = 0; i < ETH_ALEN; i++) | |
531 | encoded = (encoded << 8) | mac[i]; | |
532 | ||
533 | return encoded; | |
534 | } | |
535 | ||
1da177e4 LT |
536 | static int ibmveth_open(struct net_device *netdev) |
537 | { | |
4cf1653a | 538 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
d746ca95 | 539 | u64 mac_address; |
b6d35182 | 540 | int rxq_entries = 1; |
1da177e4 LT |
541 | unsigned long lpar_rc; |
542 | int rc; | |
543 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 544 | int i; |
8d8bb39b | 545 | struct device *dev; |
1da177e4 | 546 | |
c43ced18 | 547 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 548 | |
bea3348e SH |
549 | napi_enable(&adapter->napi); |
550 | ||
517e80e6 | 551 | for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
b6d35182 | 552 | rxq_entries += adapter->rx_buff_pool[i].size; |
d7fbeba6 | 553 | |
1da177e4 LT |
554 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
555 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 556 | |
f148f61d | 557 | if (!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
21c2dece SL |
558 | netdev_err(netdev, "unable to allocate filter or buffer list " |
559 | "pages\n"); | |
88426f2a DK |
560 | rc = -ENOMEM; |
561 | goto err_out; | |
1da177e4 LT |
562 | } |
563 | ||
d90c92fe SL |
564 | dev = &adapter->vdev->dev; |
565 | ||
f148f61d SL |
566 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
567 | rxq_entries; | |
d90c92fe | 568 | adapter->rx_queue.queue_addr = |
d0320f75 JP |
569 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
570 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
f148f61d | 571 | if (!adapter->rx_queue.queue_addr) { |
88426f2a DK |
572 | rc = -ENOMEM; |
573 | goto err_out; | |
1da177e4 LT |
574 | } |
575 | ||
8d8bb39b | 576 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 577 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 578 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 579 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
1da177e4 | 580 | |
8d8bb39b | 581 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
d90c92fe | 582 | (dma_mapping_error(dev, adapter->filter_list_dma))) { |
21c2dece SL |
583 | netdev_err(netdev, "unable to map filter or buffer list " |
584 | "pages\n"); | |
88426f2a DK |
585 | rc = -ENOMEM; |
586 | goto err_out; | |
1da177e4 LT |
587 | } |
588 | ||
589 | adapter->rx_queue.index = 0; | |
590 | adapter->rx_queue.num_slots = rxq_entries; | |
591 | adapter->rx_queue.toggle = 1; | |
592 | ||
d746ca95 | 593 | mac_address = ibmveth_encode_mac_addr(netdev->dev_addr); |
1da177e4 | 594 | |
f148f61d SL |
595 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
596 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
597 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
598 | ||
c43ced18 SL |
599 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
600 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
601 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 602 | |
4347ef15 SL |
603 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
604 | ||
bbedefcc | 605 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 606 | |
f148f61d | 607 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
608 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
609 | lpar_rc); | |
610 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
611 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
612 | adapter->buffer_list_dma, |
613 | adapter->filter_list_dma, | |
614 | rxq_desc.desc, | |
615 | mac_address); | |
88426f2a DK |
616 | rc = -ENONET; |
617 | goto err_out; | |
1da177e4 LT |
618 | } |
619 | ||
f148f61d SL |
620 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
621 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
622 | continue; |
623 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 624 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 625 | adapter->rx_buff_pool[i].active = 0; |
88426f2a DK |
626 | rc = -ENOMEM; |
627 | goto err_out; | |
860f242e SL |
628 | } |
629 | } | |
630 | ||
c43ced18 | 631 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
632 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
633 | netdev); | |
634 | if (rc != 0) { | |
21c2dece SL |
635 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
636 | netdev->irq, rc); | |
1da177e4 | 637 | do { |
95de86cf BK |
638 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
639 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 640 | |
88426f2a | 641 | goto err_out; |
1da177e4 LT |
642 | } |
643 | ||
1096d63d RJ |
644 | adapter->bounce_buffer = |
645 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
646 | if (!adapter->bounce_buffer) { | |
88426f2a | 647 | rc = -ENOMEM; |
e0e8ab59 | 648 | goto err_out_free_irq; |
1096d63d RJ |
649 | } |
650 | adapter->bounce_buffer_dma = | |
651 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
652 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 653 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 654 | netdev_err(netdev, "unable to map bounce buffer\n"); |
88426f2a | 655 | rc = -ENOMEM; |
e0e8ab59 | 656 | goto err_out_free_irq; |
1096d63d RJ |
657 | } |
658 | ||
c43ced18 | 659 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 660 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 661 | |
e2adbcb4 | 662 | netif_start_queue(netdev); |
1da177e4 | 663 | |
c43ced18 | 664 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
665 | |
666 | return 0; | |
88426f2a | 667 | |
e0e8ab59 DK |
668 | err_out_free_irq: |
669 | free_irq(netdev->irq, netdev); | |
88426f2a DK |
670 | err_out: |
671 | ibmveth_cleanup(adapter); | |
672 | napi_disable(&adapter->napi); | |
673 | return rc; | |
1da177e4 LT |
674 | } |
675 | ||
676 | static int ibmveth_close(struct net_device *netdev) | |
677 | { | |
4cf1653a | 678 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 679 | long lpar_rc; |
d7fbeba6 | 680 | |
c43ced18 | 681 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 682 | |
bea3348e SH |
683 | napi_disable(&adapter->napi); |
684 | ||
860f242e SL |
685 | if (!adapter->pool_config) |
686 | netif_stop_queue(netdev); | |
1da177e4 | 687 | |
ee2e6114 | 688 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 689 | |
1da177e4 LT |
690 | do { |
691 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 692 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 693 | |
f148f61d | 694 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
695 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
696 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
697 | } |
698 | ||
ee2e6114 RJ |
699 | free_irq(netdev->irq, netdev); |
700 | ||
f148f61d SL |
701 | adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) + |
702 | 4096 - 8); | |
1da177e4 LT |
703 | |
704 | ibmveth_cleanup(adapter); | |
705 | ||
c43ced18 | 706 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
707 | |
708 | return 0; | |
709 | } | |
710 | ||
f148f61d SL |
711 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
712 | { | |
713 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | | |
714 | SUPPORTED_FIBRE); | |
715 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | | |
716 | ADVERTISED_FIBRE); | |
70739497 | 717 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
1da177e4 LT |
718 | cmd->duplex = DUPLEX_FULL; |
719 | cmd->port = PORT_FIBRE; | |
720 | cmd->phy_address = 0; | |
721 | cmd->transceiver = XCVR_INTERNAL; | |
722 | cmd->autoneg = AUTONEG_ENABLE; | |
723 | cmd->maxtxpkt = 0; | |
724 | cmd->maxrxpkt = 1; | |
725 | return 0; | |
726 | } | |
727 | ||
f148f61d SL |
728 | static void netdev_get_drvinfo(struct net_device *dev, |
729 | struct ethtool_drvinfo *info) | |
730 | { | |
7826d43f JP |
731 | strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
732 | strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); | |
1da177e4 LT |
733 | } |
734 | ||
c8f44aff MM |
735 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
736 | netdev_features_t features) | |
5fc7e01c | 737 | { |
b9367bf3 MM |
738 | /* |
739 | * Since the ibmveth firmware interface does not have the | |
740 | * concept of separate tx/rx checksum offload enable, if rx | |
741 | * checksum is disabled we also have to disable tx checksum | |
742 | * offload. Once we disable rx checksum offload, we are no | |
743 | * longer allowed to send tx buffers that are not properly | |
744 | * checksummed. | |
745 | */ | |
5fc7e01c | 746 | |
b9367bf3 MM |
747 | if (!(features & NETIF_F_RXCSUM)) |
748 | features &= ~NETIF_F_ALL_CSUM; | |
5fc7e01c | 749 | |
b9367bf3 | 750 | return features; |
5fc7e01c BK |
751 | } |
752 | ||
b9367bf3 | 753 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 754 | { |
4cf1653a | 755 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 756 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 757 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 758 | long ret, ret4, ret6; |
5fc7e01c BK |
759 | int rc1 = 0, rc2 = 0; |
760 | int restart = 0; | |
761 | ||
762 | if (netif_running(dev)) { | |
763 | restart = 1; | |
764 | adapter->pool_config = 1; | |
765 | ibmveth_close(dev); | |
766 | adapter->pool_config = 0; | |
767 | } | |
768 | ||
79ef4a4d BK |
769 | set_attr = 0; |
770 | clr_attr = 0; | |
fb82fd20 AB |
771 | set_attr6 = 0; |
772 | clr_attr6 = 0; | |
5fc7e01c | 773 | |
ab78df75 | 774 | if (data) { |
79ef4a4d | 775 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
776 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
777 | } else { | |
79ef4a4d | 778 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
779 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
780 | } | |
5fc7e01c | 781 | |
79ef4a4d | 782 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 783 | |
79ef4a4d BK |
784 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
785 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
786 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
fb82fd20 | 787 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 788 | set_attr, &ret_attr); |
5fc7e01c | 789 | |
fb82fd20 | 790 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
791 | netdev_err(dev, "unable to change IPv4 checksum " |
792 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
793 | data, ret4); |
794 | ||
795 | h_illan_attributes(adapter->vdev->unit_address, | |
796 | set_attr, clr_attr, &ret_attr); | |
797 | ||
798 | if (data == 1) | |
799 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 800 | |
f148f61d | 801 | } else { |
ab78df75 | 802 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 803 | } |
ab78df75 SL |
804 | |
805 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
806 | clr_attr6, set_attr6, &ret_attr); | |
807 | ||
808 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
809 | netdev_err(dev, "unable to change IPv6 checksum " |
810 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
811 | data, ret6); |
812 | ||
813 | h_illan_attributes(adapter->vdev->unit_address, | |
814 | set_attr6, clr_attr6, &ret_attr); | |
815 | ||
816 | if (data == 1) | |
817 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 818 | |
ab78df75 SL |
819 | } else |
820 | adapter->fw_ipv6_csum_support = data; | |
821 | ||
fb82fd20 | 822 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 823 | adapter->rx_csum = data; |
ab78df75 SL |
824 | else |
825 | rc1 = -EIO; | |
5fc7e01c BK |
826 | } else { |
827 | rc1 = -EIO; | |
21c2dece SL |
828 | netdev_err(dev, "unable to change checksum offload settings." |
829 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
830 | ret_attr); | |
5fc7e01c BK |
831 | } |
832 | ||
833 | if (restart) | |
834 | rc2 = ibmveth_open(dev); | |
835 | ||
836 | return rc1 ? rc1 : rc2; | |
837 | } | |
838 | ||
c8f44aff MM |
839 | static int ibmveth_set_features(struct net_device *dev, |
840 | netdev_features_t features) | |
5fc7e01c | 841 | { |
4cf1653a | 842 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 MM |
843 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
844 | int rc; | |
5fc7e01c | 845 | |
b9367bf3 | 846 | if (rx_csum == adapter->rx_csum) |
5fc7e01c BK |
847 | return 0; |
848 | ||
b9367bf3 MM |
849 | rc = ibmveth_set_csum_offload(dev, rx_csum); |
850 | if (rc && !adapter->rx_csum) | |
851 | dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM); | |
5fc7e01c BK |
852 | |
853 | return rc; | |
854 | } | |
855 | ||
ddbb4de9 BK |
856 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
857 | { | |
858 | int i; | |
859 | ||
860 | if (stringset != ETH_SS_STATS) | |
861 | return; | |
862 | ||
863 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
864 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
865 | } | |
866 | ||
b9f2c044 | 867 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 868 | { |
b9f2c044 JG |
869 | switch (sset) { |
870 | case ETH_SS_STATS: | |
871 | return ARRAY_SIZE(ibmveth_stats); | |
872 | default: | |
873 | return -EOPNOTSUPP; | |
874 | } | |
ddbb4de9 BK |
875 | } |
876 | ||
877 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
878 | struct ethtool_stats *stats, u64 *data) | |
879 | { | |
880 | int i; | |
4cf1653a | 881 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
882 | |
883 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
884 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
885 | } | |
886 | ||
7282d491 | 887 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
888 | .get_drvinfo = netdev_get_drvinfo, |
889 | .get_settings = netdev_get_settings, | |
ed4ba4b5 | 890 | .get_link = ethtool_op_get_link, |
ddbb4de9 | 891 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 892 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 893 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
1da177e4 LT |
894 | }; |
895 | ||
896 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
897 | { | |
898 | return -EOPNOTSUPP; | |
899 | } | |
900 | ||
901 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
902 | ||
6e8ab30e SL |
903 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
904 | union ibmveth_buf_desc *descs) | |
1da177e4 | 905 | { |
1da177e4 LT |
906 | unsigned long correlator; |
907 | unsigned int retry_count; | |
6e8ab30e SL |
908 | unsigned long ret; |
909 | ||
910 | /* | |
911 | * The retry count sets a maximum for the number of broadcast and | |
912 | * multicast destinations within the system. | |
913 | */ | |
914 | retry_count = 1024; | |
915 | correlator = 0; | |
916 | do { | |
917 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
918 | descs[0].desc, descs[1].desc, | |
919 | descs[2].desc, descs[3].desc, | |
920 | descs[4].desc, descs[5].desc, | |
921 | correlator, &correlator); | |
922 | } while ((ret == H_BUSY) && (retry_count--)); | |
923 | ||
924 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
925 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
926 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
927 | return 1; |
928 | } | |
929 | ||
930 | return 0; | |
931 | } | |
60296d9e | 932 | |
6e8ab30e SL |
933 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
934 | struct net_device *netdev) | |
935 | { | |
936 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
937 | unsigned int desc_flags; | |
938 | union ibmveth_buf_desc descs[6]; | |
939 | int last, i; | |
940 | int force_bounce = 0; | |
b93da27f | 941 | dma_addr_t dma_addr; |
6e8ab30e SL |
942 | |
943 | /* | |
944 | * veth handles a maximum of 6 segments including the header, so | |
945 | * we have to linearize the skb if there are more than this. | |
946 | */ | |
947 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
948 | netdev->stats.tx_dropped++; | |
949 | goto out; | |
950 | } | |
1da177e4 | 951 | |
6e8ab30e | 952 | /* veth can't checksum offload UDP */ |
f4ff2872 | 953 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
954 | ((skb->protocol == htons(ETH_P_IP) && |
955 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
956 | (skb->protocol == htons(ETH_P_IPV6) && | |
957 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
958 | skb_checksum_help(skb)) { | |
959 | ||
21c2dece | 960 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 961 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
962 | goto out; |
963 | } | |
964 | ||
6e8ab30e SL |
965 | desc_flags = IBMVETH_BUF_VALID; |
966 | ||
f4ff2872 | 967 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
968 | unsigned char *buf = skb_transport_header(skb) + |
969 | skb->csum_offset; | |
f4ff2872 | 970 | |
6e8ab30e | 971 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
972 | |
973 | /* Need to zero out the checksum */ | |
974 | buf[0] = 0; | |
975 | buf[1] = 0; | |
976 | } | |
977 | ||
6e8ab30e SL |
978 | retry_bounce: |
979 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 980 | |
6e8ab30e SL |
981 | /* |
982 | * If a linear packet is below the rx threshold then | |
983 | * copy it into the static bounce buffer. This avoids the | |
984 | * cost of a TCE insert and remove. | |
985 | */ | |
986 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
987 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
988 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
989 | skb->len); | |
1da177e4 | 990 | |
6e8ab30e SL |
991 | descs[0].fields.flags_len = desc_flags | skb->len; |
992 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
993 | ||
994 | if (ibmveth_send(adapter, descs)) { | |
995 | adapter->tx_send_failed++; | |
996 | netdev->stats.tx_dropped++; | |
997 | } else { | |
998 | netdev->stats.tx_packets++; | |
999 | netdev->stats.tx_bytes += skb->len; | |
1000 | } | |
1001 | ||
1002 | goto out; | |
1003 | } | |
1004 | ||
1005 | /* Map the header */ | |
b93da27f AB |
1006 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
1007 | skb_headlen(skb), DMA_TO_DEVICE); | |
1008 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
6e8ab30e SL |
1009 | goto map_failed; |
1010 | ||
1011 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
b93da27f | 1012 | descs[0].fields.address = dma_addr; |
6e8ab30e SL |
1013 | |
1014 | /* Map the frags */ | |
1015 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 1016 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
6e8ab30e | 1017 | |
8838a538 | 1018 | dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
9e903e08 | 1019 | skb_frag_size(frag), DMA_TO_DEVICE); |
6e8ab30e SL |
1020 | |
1021 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1022 | goto map_failed_frags; | |
1023 | ||
9e903e08 | 1024 | descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
6e8ab30e SL |
1025 | descs[i+1].fields.address = dma_addr; |
1026 | } | |
1027 | ||
1028 | if (ibmveth_send(adapter, descs)) { | |
1029 | adapter->tx_send_failed++; | |
1030 | netdev->stats.tx_dropped++; | |
1da177e4 | 1031 | } else { |
6e8ab30e SL |
1032 | netdev->stats.tx_packets++; |
1033 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1034 | } |
1035 | ||
33a48ab1 BK |
1036 | dma_unmap_single(&adapter->vdev->dev, |
1037 | descs[0].fields.address, | |
1038 | descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1039 | DMA_TO_DEVICE); | |
1040 | ||
1041 | for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) | |
6e8ab30e SL |
1042 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, |
1043 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1044 | DMA_TO_DEVICE); | |
1da177e4 | 1045 | |
e8cb7eb4 | 1046 | out: |
1da177e4 | 1047 | dev_kfree_skb(skb); |
6ed10654 | 1048 | return NETDEV_TX_OK; |
6e8ab30e SL |
1049 | |
1050 | map_failed_frags: | |
1051 | last = i+1; | |
1052 | for (i = 0; i < last; i++) | |
1053 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1054 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1055 | DMA_TO_DEVICE); | |
1056 | ||
1057 | map_failed: | |
1058 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1059 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e SL |
1060 | adapter->tx_map_failed++; |
1061 | skb_linearize(skb); | |
1062 | force_bounce = 1; | |
1063 | goto retry_bounce; | |
1da177e4 LT |
1064 | } |
1065 | ||
bea3348e | 1066 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1067 | { |
f148f61d SL |
1068 | struct ibmveth_adapter *adapter = |
1069 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1070 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1071 | int frames_processed = 0; |
1da177e4 LT |
1072 | unsigned long lpar_rc; |
1073 | ||
f148f61d | 1074 | restart_poll: |
1da177e4 | 1075 | do { |
bea3348e SH |
1076 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1077 | break; | |
1da177e4 | 1078 | |
f89e49e7 | 1079 | smp_rmb(); |
bea3348e SH |
1080 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1081 | wmb(); /* suggested by larson1 */ | |
1082 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1083 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1084 | ibmveth_rxq_recycle_buffer(adapter); |
1085 | } else { | |
8d86c61a | 1086 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1087 | int length = ibmveth_rxq_frame_length(adapter); |
1088 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1089 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1090 | ||
bea3348e | 1091 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1092 | |
8d86c61a SL |
1093 | new_skb = NULL; |
1094 | if (length < rx_copybreak) | |
1095 | new_skb = netdev_alloc_skb(netdev, length); | |
1096 | ||
1097 | if (new_skb) { | |
1098 | skb_copy_to_linear_data(new_skb, | |
1099 | skb->data + offset, | |
1100 | length); | |
0c26b677 SL |
1101 | if (rx_flush) |
1102 | ibmveth_flush_buffer(skb->data, | |
1103 | length + offset); | |
c6f59d13 AB |
1104 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1105 | kfree_skb(skb); | |
8d86c61a | 1106 | skb = new_skb; |
8d86c61a SL |
1107 | } else { |
1108 | ibmveth_rxq_harvest_buffer(adapter); | |
1109 | skb_reserve(skb, offset); | |
1110 | } | |
1da177e4 | 1111 | |
bea3348e SH |
1112 | skb_put(skb, length); |
1113 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1114 | |
8d86c61a SL |
1115 | if (csum_good) |
1116 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1117 | ||
bea3348e | 1118 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1119 | |
09f75cd7 JG |
1120 | netdev->stats.rx_packets++; |
1121 | netdev->stats.rx_bytes += length; | |
bea3348e | 1122 | frames_processed++; |
1da177e4 | 1123 | } |
bea3348e | 1124 | } while (frames_processed < budget); |
1da177e4 | 1125 | |
e2adbcb4 | 1126 | ibmveth_replenish_task(adapter); |
1da177e4 | 1127 | |
bea3348e SH |
1128 | if (frames_processed < budget) { |
1129 | /* We think we are done - reenable interrupts, | |
1130 | * then check once more to make sure we are done. | |
1131 | */ | |
1132 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1133 | VIO_IRQ_ENABLE); | |
1da177e4 | 1134 | |
6485911a | 1135 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1136 | |
288379f0 | 1137 | napi_complete(napi); |
1da177e4 | 1138 | |
bea3348e | 1139 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1140 | napi_reschedule(napi)) { |
bea3348e SH |
1141 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1142 | VIO_IRQ_DISABLE); | |
1143 | goto restart_poll; | |
1144 | } | |
1da177e4 LT |
1145 | } |
1146 | ||
bea3348e | 1147 | return frames_processed; |
1da177e4 LT |
1148 | } |
1149 | ||
7d12e780 | 1150 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1151 | { |
1da177e4 | 1152 | struct net_device *netdev = dev_instance; |
4cf1653a | 1153 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1154 | unsigned long lpar_rc; |
1155 | ||
288379f0 | 1156 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1157 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1158 | VIO_IRQ_DISABLE); | |
6485911a | 1159 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1160 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1161 | } |
1162 | return IRQ_HANDLED; | |
1163 | } | |
1164 | ||
1da177e4 LT |
1165 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1166 | { | |
4cf1653a | 1167 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1168 | unsigned long lpar_rc; |
1169 | ||
4cd24eaf JP |
1170 | if ((netdev->flags & IFF_PROMISC) || |
1171 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1172 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1173 | IbmVethMcastEnableRecv | | |
1174 | IbmVethMcastDisableFiltering, | |
1175 | 0); | |
f148f61d | 1176 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1177 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1178 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1179 | } |
1180 | } else { | |
22bedad3 | 1181 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1182 | /* clear the filter table & disable filtering */ |
1183 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1184 | IbmVethMcastEnableRecv | | |
1185 | IbmVethMcastDisableFiltering | | |
1186 | IbmVethMcastClearFilterTable, | |
1187 | 0); | |
f148f61d | 1188 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1189 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1190 | "attempting to clear filter table\n", | |
1191 | lpar_rc); | |
1da177e4 LT |
1192 | } |
1193 | /* add the addresses to the filter table */ | |
22bedad3 | 1194 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1195 | /* add the multicast address to the filter table */ |
d746ca95 AB |
1196 | u64 mcast_addr; |
1197 | mcast_addr = ibmveth_encode_mac_addr(ha->addr); | |
1da177e4 LT |
1198 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1199 | IbmVethMcastAddFilter, | |
1200 | mcast_addr); | |
f148f61d | 1201 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1202 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1203 | "when adding an entry to the filter " | |
1204 | "table\n", lpar_rc); | |
1da177e4 LT |
1205 | } |
1206 | } | |
d7fbeba6 | 1207 | |
1da177e4 LT |
1208 | /* re-enable filtering */ |
1209 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1210 | IbmVethMcastEnableFiltering, | |
1211 | 0); | |
f148f61d | 1212 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1213 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1214 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1215 | } |
1216 | } | |
1217 | } | |
1218 | ||
1219 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1220 | { | |
4cf1653a | 1221 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1222 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1223 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1224 | int i, rc; |
1225 | int need_restart = 0; | |
b6d35182 | 1226 | |
517e80e6 | 1227 | if (new_mtu < IBMVETH_MIN_MTU) |
1da177e4 | 1228 | return -EINVAL; |
b6d35182 | 1229 | |
517e80e6 | 1230 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
ce6eea58 BK |
1231 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) |
1232 | break; | |
1233 | ||
517e80e6 | 1234 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1235 | return -EINVAL; |
1236 | ||
ea866e65 SL |
1237 | /* Deactivate all the buffer pools so that the next loop can activate |
1238 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1239 | if (netif_running(adapter->netdev)) { |
1240 | need_restart = 1; | |
1241 | adapter->pool_config = 1; | |
1242 | ibmveth_close(adapter->netdev); | |
1243 | adapter->pool_config = 0; | |
1244 | } | |
ea866e65 | 1245 | |
860f242e | 1246 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1247 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1248 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1249 | |
860f242e | 1250 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1251 | dev->mtu = new_mtu; |
1252 | vio_cmo_set_dev_desired(viodev, | |
1253 | ibmveth_get_desired_dma | |
1254 | (viodev)); | |
0645bab7 RJ |
1255 | if (need_restart) { |
1256 | return ibmveth_open(adapter->netdev); | |
1257 | } | |
860f242e | 1258 | return 0; |
b6d35182 | 1259 | } |
b6d35182 | 1260 | } |
0645bab7 RJ |
1261 | |
1262 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1263 | return rc; | |
1264 | ||
860f242e | 1265 | return -EINVAL; |
1da177e4 LT |
1266 | } |
1267 | ||
6b422374 SL |
1268 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1269 | static void ibmveth_poll_controller(struct net_device *dev) | |
1270 | { | |
4cf1653a | 1271 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1272 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1273 | } |
1274 | #endif | |
1275 | ||
1096d63d RJ |
1276 | /** |
1277 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1278 | * | |
1279 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1280 | * | |
1281 | * Return value: | |
1282 | * Number of bytes of IO data the driver will need to perform well. | |
1283 | */ | |
1284 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1285 | { | |
1286 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1287 | struct ibmveth_adapter *adapter; | |
d0847757 | 1288 | struct iommu_table *tbl; |
1096d63d RJ |
1289 | unsigned long ret; |
1290 | int i; | |
1291 | int rxqentries = 1; | |
1292 | ||
d0847757 AP |
1293 | tbl = get_iommu_table_base(&vdev->dev); |
1294 | ||
1096d63d RJ |
1295 | /* netdev inits at probe time along with the structures we need below*/ |
1296 | if (netdev == NULL) | |
d0847757 | 1297 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); |
1096d63d RJ |
1298 | |
1299 | adapter = netdev_priv(netdev); | |
1300 | ||
1301 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
d0847757 | 1302 | ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); |
1096d63d | 1303 | |
517e80e6 | 1304 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1305 | /* add the size of the active receive buffers */ |
1306 | if (adapter->rx_buff_pool[i].active) | |
1307 | ret += | |
1308 | adapter->rx_buff_pool[i].size * | |
1309 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
d0847757 | 1310 | buff_size, tbl); |
1096d63d RJ |
1311 | rxqentries += adapter->rx_buff_pool[i].size; |
1312 | } | |
1313 | /* add the size of the receive queue entries */ | |
d0847757 AP |
1314 | ret += IOMMU_PAGE_ALIGN( |
1315 | rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); | |
1096d63d RJ |
1316 | |
1317 | return ret; | |
1318 | } | |
1319 | ||
e186d174 AB |
1320 | static const struct net_device_ops ibmveth_netdev_ops = { |
1321 | .ndo_open = ibmveth_open, | |
1322 | .ndo_stop = ibmveth_close, | |
1323 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1324 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
e186d174 AB |
1325 | .ndo_do_ioctl = ibmveth_ioctl, |
1326 | .ndo_change_mtu = ibmveth_change_mtu, | |
b9367bf3 MM |
1327 | .ndo_fix_features = ibmveth_fix_features, |
1328 | .ndo_set_features = ibmveth_set_features, | |
e186d174 AB |
1329 | .ndo_validate_addr = eth_validate_addr, |
1330 | .ndo_set_mac_address = eth_mac_addr, | |
1331 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1332 | .ndo_poll_controller = ibmveth_poll_controller, | |
1333 | #endif | |
1334 | }; | |
1335 | ||
1dd06ae8 | 1336 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1337 | { |
13f85203 | 1338 | int rc, i, mac_len; |
1da177e4 | 1339 | struct net_device *netdev; |
9dc83afd | 1340 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1341 | unsigned char *mac_addr_p; |
1342 | unsigned int *mcastFilterSize_p; | |
1343 | ||
c43ced18 SL |
1344 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1345 | dev->unit_address); | |
1da177e4 | 1346 | |
f148f61d | 1347 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
13f85203 | 1348 | &mac_len); |
f148f61d | 1349 | if (!mac_addr_p) { |
21c2dece | 1350 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1351 | return -EINVAL; |
1da177e4 | 1352 | } |
13f85203 BH |
1353 | /* Workaround for old/broken pHyp */ |
1354 | if (mac_len == 8) | |
1355 | mac_addr_p += 2; | |
1356 | else if (mac_len != 6) { | |
1357 | dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", | |
1358 | mac_len); | |
1359 | return -EINVAL; | |
1360 | } | |
d7fbeba6 | 1361 | |
f148f61d | 1362 | mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, |
493a684a | 1363 | VETH_MCAST_FILTER_SIZE, NULL); |
f148f61d | 1364 | if (!mcastFilterSize_p) { |
21c2dece SL |
1365 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1366 | "attribute\n"); | |
be35ae9e | 1367 | return -EINVAL; |
1da177e4 | 1368 | } |
d7fbeba6 | 1369 | |
1da177e4 LT |
1370 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1371 | ||
f148f61d | 1372 | if (!netdev) |
1da177e4 LT |
1373 | return -ENOMEM; |
1374 | ||
4cf1653a | 1375 | adapter = netdev_priv(netdev); |
c7ae011d | 1376 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1377 | |
1378 | adapter->vdev = dev; | |
1379 | adapter->netdev = netdev; | |
f148f61d | 1380 | adapter->mcastFilterSize = *mcastFilterSize_p; |
860f242e | 1381 | adapter->pool_config = 0; |
d7fbeba6 | 1382 | |
bea3348e SH |
1383 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1384 | ||
1da177e4 | 1385 | netdev->irq = dev->irq; |
e186d174 AB |
1386 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1387 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1388 | SET_NETDEV_DEV(netdev, &dev->dev); |
b9367bf3 MM |
1389 | netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | |
1390 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
1391 | netdev->features |= netdev->hw_features; | |
1da177e4 | 1392 | |
d746ca95 | 1393 | memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN); |
1da177e4 | 1394 | |
f148f61d | 1395 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1396 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1397 | int error; |
1398 | ||
d7fbeba6 JG |
1399 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1400 | pool_count[i], pool_size[i], | |
860f242e | 1401 | pool_active[i]); |
8dde2a96 GKH |
1402 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1403 | &dev->dev.kobj, "pool%d", i); | |
1404 | if (!error) | |
1405 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1406 | } |
1da177e4 | 1407 | |
c43ced18 | 1408 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1409 | |
1da177e4 LT |
1410 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1411 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1412 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1413 | ||
c43ced18 | 1414 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1415 | |
b801a4e7 MM |
1416 | ibmveth_set_features(netdev, netdev->features); |
1417 | ||
1da177e4 LT |
1418 | rc = register_netdev(netdev); |
1419 | ||
f148f61d | 1420 | if (rc) { |
c43ced18 | 1421 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1422 | free_netdev(netdev); |
1423 | return rc; | |
1424 | } | |
1425 | ||
c43ced18 | 1426 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1427 | |
1da177e4 LT |
1428 | return 0; |
1429 | } | |
1430 | ||
e11787a2 | 1431 | static int ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1432 | { |
c7ae011d | 1433 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1434 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1435 | int i; |
1436 | ||
f148f61d | 1437 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1438 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1439 | |
1440 | unregister_netdev(netdev); | |
1441 | ||
1da177e4 | 1442 | free_netdev(netdev); |
1096d63d RJ |
1443 | dev_set_drvdata(&dev->dev, NULL); |
1444 | ||
1da177e4 LT |
1445 | return 0; |
1446 | } | |
1447 | ||
860f242e SL |
1448 | static struct attribute veth_active_attr; |
1449 | static struct attribute veth_num_attr; | |
1450 | static struct attribute veth_size_attr; | |
1451 | ||
f148f61d SL |
1452 | static ssize_t veth_pool_show(struct kobject *kobj, |
1453 | struct attribute *attr, char *buf) | |
860f242e | 1454 | { |
d7fbeba6 | 1455 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1456 | struct ibmveth_buff_pool, |
1457 | kobj); | |
1458 | ||
1459 | if (attr == &veth_active_attr) | |
1460 | return sprintf(buf, "%d\n", pool->active); | |
1461 | else if (attr == &veth_num_attr) | |
1462 | return sprintf(buf, "%d\n", pool->size); | |
1463 | else if (attr == &veth_size_attr) | |
1464 | return sprintf(buf, "%d\n", pool->buff_size); | |
1465 | return 0; | |
1466 | } | |
1467 | ||
f148f61d SL |
1468 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1469 | const char *buf, size_t count) | |
860f242e | 1470 | { |
d7fbeba6 | 1471 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1472 | struct ibmveth_buff_pool, |
1473 | kobj); | |
c7ae011d GKH |
1474 | struct net_device *netdev = dev_get_drvdata( |
1475 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1476 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1477 | long value = simple_strtol(buf, NULL, 10); |
1478 | long rc; | |
1479 | ||
1480 | if (attr == &veth_active_attr) { | |
1481 | if (value && !pool->active) { | |
4aa9c93e | 1482 | if (netif_running(netdev)) { |
f148f61d | 1483 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1484 | netdev_err(netdev, |
1485 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1486 | return -ENOMEM; |
1487 | } | |
1488 | pool->active = 1; | |
1489 | adapter->pool_config = 1; | |
1490 | ibmveth_close(netdev); | |
1491 | adapter->pool_config = 0; | |
1492 | if ((rc = ibmveth_open(netdev))) | |
1493 | return rc; | |
f148f61d | 1494 | } else { |
4aa9c93e | 1495 | pool->active = 1; |
f148f61d | 1496 | } |
860f242e SL |
1497 | } else if (!value && pool->active) { |
1498 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1499 | int i; | |
1500 | /* Make sure there is a buffer pool with buffers that | |
1501 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1502 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1503 | if (pool == &adapter->rx_buff_pool[i]) |
1504 | continue; | |
1505 | if (!adapter->rx_buff_pool[i].active) | |
1506 | continue; | |
76b9cfcc BK |
1507 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1508 | break; | |
860f242e | 1509 | } |
76b9cfcc | 1510 | |
517e80e6 | 1511 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1512 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1513 | return -EPERM; |
1514 | } | |
76b9cfcc | 1515 | |
76b9cfcc BK |
1516 | if (netif_running(netdev)) { |
1517 | adapter->pool_config = 1; | |
1518 | ibmveth_close(netdev); | |
ea866e65 | 1519 | pool->active = 0; |
76b9cfcc BK |
1520 | adapter->pool_config = 0; |
1521 | if ((rc = ibmveth_open(netdev))) | |
1522 | return rc; | |
1523 | } | |
ea866e65 | 1524 | pool->active = 0; |
860f242e SL |
1525 | } |
1526 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1527 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1528 | return -EINVAL; |
f148f61d | 1529 | } else { |
4aa9c93e BK |
1530 | if (netif_running(netdev)) { |
1531 | adapter->pool_config = 1; | |
1532 | ibmveth_close(netdev); | |
1533 | adapter->pool_config = 0; | |
1534 | pool->size = value; | |
1535 | if ((rc = ibmveth_open(netdev))) | |
1536 | return rc; | |
f148f61d | 1537 | } else { |
4aa9c93e | 1538 | pool->size = value; |
f148f61d | 1539 | } |
860f242e SL |
1540 | } |
1541 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1542 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1543 | return -EINVAL; |
f148f61d | 1544 | } else { |
4aa9c93e BK |
1545 | if (netif_running(netdev)) { |
1546 | adapter->pool_config = 1; | |
1547 | ibmveth_close(netdev); | |
1548 | adapter->pool_config = 0; | |
1549 | pool->buff_size = value; | |
1550 | if ((rc = ibmveth_open(netdev))) | |
1551 | return rc; | |
f148f61d | 1552 | } else { |
4aa9c93e | 1553 | pool->buff_size = value; |
f148f61d | 1554 | } |
860f242e SL |
1555 | } |
1556 | } | |
1557 | ||
1558 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1559 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1560 | return count; |
1561 | } | |
1562 | ||
1563 | ||
f148f61d SL |
1564 | #define ATTR(_name, _mode) \ |
1565 | struct attribute veth_##_name##_attr = { \ | |
1566 | .name = __stringify(_name), .mode = _mode, \ | |
1567 | }; | |
860f242e SL |
1568 | |
1569 | static ATTR(active, 0644); | |
1570 | static ATTR(num, 0644); | |
1571 | static ATTR(size, 0644); | |
1572 | ||
f148f61d | 1573 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1574 | &veth_active_attr, |
1575 | &veth_num_attr, | |
1576 | &veth_size_attr, | |
1577 | NULL, | |
1578 | }; | |
1579 | ||
52cf25d0 | 1580 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1581 | .show = veth_pool_show, |
1582 | .store = veth_pool_store, | |
1583 | }; | |
1584 | ||
1585 | static struct kobj_type ktype_veth_pool = { | |
1586 | .release = NULL, | |
1587 | .sysfs_ops = &veth_pool_ops, | |
1588 | .default_attrs = veth_pool_attrs, | |
1589 | }; | |
1590 | ||
e7a3af5d BK |
1591 | static int ibmveth_resume(struct device *dev) |
1592 | { | |
1593 | struct net_device *netdev = dev_get_drvdata(dev); | |
1594 | ibmveth_interrupt(netdev->irq, netdev); | |
1595 | return 0; | |
1596 | } | |
860f242e | 1597 | |
e11787a2 | 1598 | static struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1599 | { "network", "IBM,l-lan"}, |
fb120da6 | 1600 | { "", "" } |
1da177e4 | 1601 | }; |
1da177e4 LT |
1602 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1603 | ||
e7a3af5d BK |
1604 | static struct dev_pm_ops ibmveth_pm_ops = { |
1605 | .resume = ibmveth_resume | |
1606 | }; | |
1607 | ||
1da177e4 | 1608 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1609 | .id_table = ibmveth_device_table, |
1610 | .probe = ibmveth_probe, | |
1611 | .remove = ibmveth_remove, | |
1096d63d | 1612 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1613 | .name = ibmveth_driver_name, |
1614 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1615 | }; |
1616 | ||
1617 | static int __init ibmveth_module_init(void) | |
1618 | { | |
21c2dece SL |
1619 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1620 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1621 | |
1da177e4 LT |
1622 | return vio_register_driver(&ibmveth_driver); |
1623 | } | |
1624 | ||
1625 | static void __exit ibmveth_module_exit(void) | |
1626 | { | |
1627 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1628 | } |
1da177e4 LT |
1629 | |
1630 | module_init(ibmveth_module_init); | |
1631 | module_exit(ibmveth_module_exit); |