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 | 60 | static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; |
7b596738 | 61 | #define ibmveth_driver_version "1.06" |
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 | ||
07e6a97d TF |
82 | static bool old_large_send __read_mostly; |
83 | module_param(old_large_send, bool, S_IRUGO); | |
84 | MODULE_PARM_DESC(old_large_send, | |
85 | "Use old large send method on firmware that supports the new method"); | |
86 | ||
ddbb4de9 BK |
87 | struct ibmveth_stat { |
88 | char name[ETH_GSTRING_LEN]; | |
89 | int offset; | |
90 | }; | |
91 | ||
92 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
93 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
94 | ||
95 | struct ibmveth_stat ibmveth_stats[] = { | |
96 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
97 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
f148f61d SL |
98 | { "replenish_add_buff_failure", |
99 | IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
100 | { "replenish_add_buff_success", | |
101 | IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
ddbb4de9 BK |
102 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, |
103 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
104 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
105 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
106 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
107 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
8641dd85 | 108 | { "tx_large_packets", IBMVETH_STAT_OFF(tx_large_packets) }, |
07e6a97d TF |
109 | { "rx_large_packets", IBMVETH_STAT_OFF(rx_large_packets) }, |
110 | { "fw_enabled_large_send", IBMVETH_STAT_OFF(fw_large_send_support) } | |
ddbb4de9 BK |
111 | }; |
112 | ||
1da177e4 | 113 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
114 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
115 | { | |
0b536be7 | 116 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); |
79ef4a4d BK |
117 | } |
118 | ||
119 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
120 | { | |
f148f61d SL |
121 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> |
122 | IBMVETH_RXQ_TOGGLE_SHIFT; | |
79ef4a4d BK |
123 | } |
124 | ||
1da177e4 LT |
125 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
126 | { | |
f148f61d | 127 | return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; |
1da177e4 LT |
128 | } |
129 | ||
130 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
131 | { | |
f148f61d | 132 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; |
1da177e4 LT |
133 | } |
134 | ||
135 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
136 | { | |
f148f61d | 137 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; |
1da177e4 LT |
138 | } |
139 | ||
7b596738 TF |
140 | static inline int ibmveth_rxq_large_packet(struct ibmveth_adapter *adapter) |
141 | { | |
142 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_LRG_PKT; | |
143 | } | |
144 | ||
1da177e4 LT |
145 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) |
146 | { | |
0b536be7 | 147 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); |
1da177e4 LT |
148 | } |
149 | ||
f4ff2872 BK |
150 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
151 | { | |
f148f61d | 152 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; |
f4ff2872 BK |
153 | } |
154 | ||
1da177e4 | 155 | /* setup the initial settings for a buffer pool */ |
f148f61d SL |
156 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, |
157 | u32 pool_index, u32 pool_size, | |
158 | u32 buff_size, u32 pool_active) | |
1da177e4 LT |
159 | { |
160 | pool->size = pool_size; | |
161 | pool->index = pool_index; | |
162 | pool->buff_size = buff_size; | |
c033a6d1 | 163 | pool->threshold = pool_size * 7 / 8; |
860f242e | 164 | pool->active = pool_active; |
1da177e4 LT |
165 | } |
166 | ||
167 | /* allocate and setup an buffer pool - called during open */ | |
168 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
169 | { | |
170 | int i; | |
171 | ||
d7fbeba6 | 172 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 | 173 | |
f148f61d | 174 | if (!pool->free_map) |
1da177e4 | 175 | return -1; |
1da177e4 | 176 | |
076ef440 | 177 | pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL); |
f148f61d | 178 | if (!pool->dma_addr) { |
1da177e4 LT |
179 | kfree(pool->free_map); |
180 | pool->free_map = NULL; | |
181 | return -1; | |
182 | } | |
183 | ||
a05abcb5 | 184 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 | 185 | |
f148f61d | 186 | if (!pool->skbuff) { |
1da177e4 LT |
187 | kfree(pool->dma_addr); |
188 | pool->dma_addr = NULL; | |
189 | ||
190 | kfree(pool->free_map); | |
191 | pool->free_map = NULL; | |
192 | return -1; | |
193 | } | |
194 | ||
f148f61d | 195 | for (i = 0; i < pool->size; ++i) |
1da177e4 | 196 | pool->free_map[i] = i; |
1da177e4 LT |
197 | |
198 | atomic_set(&pool->available, 0); | |
199 | pool->producer_index = 0; | |
200 | pool->consumer_index = 0; | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
0c26b677 SL |
205 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
206 | { | |
207 | unsigned long offset; | |
208 | ||
209 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
210 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
211 | } | |
212 | ||
1da177e4 LT |
213 | /* replenish the buffers for a pool. note that we don't need to |
214 | * skb_reserve these since they are used for incoming... | |
215 | */ | |
f148f61d SL |
216 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, |
217 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
218 | { |
219 | u32 i; | |
220 | u32 count = pool->size - atomic_read(&pool->available); | |
221 | u32 buffers_added = 0; | |
1096d63d RJ |
222 | struct sk_buff *skb; |
223 | unsigned int free_index, index; | |
224 | u64 correlator; | |
225 | unsigned long lpar_rc; | |
226 | dma_addr_t dma_addr; | |
1da177e4 LT |
227 | |
228 | mb(); | |
229 | ||
f148f61d | 230 | for (i = 0; i < count; ++i) { |
1da177e4 | 231 | union ibmveth_buf_desc desc; |
1da177e4 | 232 | |
003212cc | 233 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 | 234 | |
f148f61d | 235 | if (!skb) { |
c43ced18 SL |
236 | netdev_dbg(adapter->netdev, |
237 | "replenish: unable to allocate skb\n"); | |
1da177e4 LT |
238 | adapter->replenish_no_mem++; |
239 | break; | |
240 | } | |
241 | ||
047a66d4 | 242 | free_index = pool->consumer_index; |
a613f581 SL |
243 | pool->consumer_index++; |
244 | if (pool->consumer_index >= pool->size) | |
245 | pool->consumer_index = 0; | |
1da177e4 | 246 | index = pool->free_map[free_index]; |
d7fbeba6 | 247 | |
6485911a SL |
248 | BUG_ON(index == IBM_VETH_INVALID_MAP); |
249 | BUG_ON(pool->skbuff[index] != NULL); | |
1da177e4 LT |
250 | |
251 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
252 | pool->buff_size, DMA_FROM_DEVICE); | |
253 | ||
c713e7cb | 254 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
255 | goto failure; |
256 | ||
1da177e4 LT |
257 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
258 | pool->dma_addr[index] = dma_addr; | |
259 | pool->skbuff[index] = skb; | |
260 | ||
261 | correlator = ((u64)pool->index << 32) | index; | |
f148f61d | 262 | *(u64 *)skb->data = correlator; |
1da177e4 | 263 | |
79ef4a4d | 264 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 265 | desc.fields.address = dma_addr; |
1da177e4 | 266 | |
0c26b677 SL |
267 | if (rx_flush) { |
268 | unsigned int len = min(pool->buff_size, | |
269 | adapter->netdev->mtu + | |
270 | IBMVETH_BUFF_OH); | |
271 | ibmveth_flush_buffer(skb->data, len); | |
272 | } | |
f148f61d SL |
273 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, |
274 | desc.desc); | |
d7fbeba6 | 275 | |
f148f61d | 276 | if (lpar_rc != H_SUCCESS) { |
1096d63d | 277 | goto failure; |
f148f61d | 278 | } else { |
1da177e4 LT |
279 | buffers_added++; |
280 | adapter->replenish_add_buff_success++; | |
281 | } | |
282 | } | |
d7fbeba6 | 283 | |
1096d63d RJ |
284 | mb(); |
285 | atomic_add(buffers_added, &(pool->available)); | |
286 | return; | |
287 | ||
288 | failure: | |
289 | pool->free_map[free_index] = index; | |
290 | pool->skbuff[index] = NULL; | |
291 | if (pool->consumer_index == 0) | |
292 | pool->consumer_index = pool->size - 1; | |
293 | else | |
294 | pool->consumer_index--; | |
c713e7cb | 295 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
296 | dma_unmap_single(&adapter->vdev->dev, |
297 | pool->dma_addr[index], pool->buff_size, | |
298 | DMA_FROM_DEVICE); | |
299 | dev_kfree_skb_any(skb); | |
300 | adapter->replenish_add_buff_failure++; | |
301 | ||
1da177e4 LT |
302 | mb(); |
303 | atomic_add(buffers_added, &(pool->available)); | |
304 | } | |
305 | ||
cbd52281 AB |
306 | /* |
307 | * The final 8 bytes of the buffer list is a counter of frames dropped | |
308 | * because there was not a buffer in the buffer list capable of holding | |
309 | * the frame. | |
310 | */ | |
311 | static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter) | |
312 | { | |
313 | __be64 *p = adapter->buffer_list_addr + 4096 - 8; | |
314 | ||
315 | adapter->rx_no_buffer = be64_to_cpup(p); | |
316 | } | |
317 | ||
e2adbcb4 | 318 | /* replenish routine */ |
d7fbeba6 | 319 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 320 | { |
b6d35182 SL |
321 | int i; |
322 | ||
1da177e4 LT |
323 | adapter->replenish_task_cycles++; |
324 | ||
517e80e6 | 325 | for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { |
c033a6d1 SL |
326 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; |
327 | ||
328 | if (pool->active && | |
329 | (atomic_read(&pool->available) < pool->threshold)) | |
330 | ibmveth_replenish_buffer_pool(adapter, pool); | |
331 | } | |
1da177e4 | 332 | |
cbd52281 | 333 | ibmveth_update_rx_no_buffer(adapter); |
1da177e4 LT |
334 | } |
335 | ||
336 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
f148f61d SL |
337 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, |
338 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
339 | { |
340 | int i; | |
341 | ||
b4558ea9 JJ |
342 | kfree(pool->free_map); |
343 | pool->free_map = NULL; | |
1da177e4 | 344 | |
f148f61d SL |
345 | if (pool->skbuff && pool->dma_addr) { |
346 | for (i = 0; i < pool->size; ++i) { | |
1da177e4 | 347 | struct sk_buff *skb = pool->skbuff[i]; |
f148f61d | 348 | if (skb) { |
1da177e4 LT |
349 | dma_unmap_single(&adapter->vdev->dev, |
350 | pool->dma_addr[i], | |
351 | pool->buff_size, | |
352 | DMA_FROM_DEVICE); | |
353 | dev_kfree_skb_any(skb); | |
354 | pool->skbuff[i] = NULL; | |
355 | } | |
356 | } | |
357 | } | |
358 | ||
f148f61d | 359 | if (pool->dma_addr) { |
1da177e4 LT |
360 | kfree(pool->dma_addr); |
361 | pool->dma_addr = NULL; | |
362 | } | |
363 | ||
f148f61d | 364 | if (pool->skbuff) { |
1da177e4 LT |
365 | kfree(pool->skbuff); |
366 | pool->skbuff = NULL; | |
367 | } | |
368 | } | |
369 | ||
370 | /* remove a buffer from a pool */ | |
f148f61d SL |
371 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, |
372 | u64 correlator) | |
1da177e4 LT |
373 | { |
374 | unsigned int pool = correlator >> 32; | |
375 | unsigned int index = correlator & 0xffffffffUL; | |
376 | unsigned int free_index; | |
377 | struct sk_buff *skb; | |
378 | ||
6485911a SL |
379 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
380 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
381 | |
382 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
383 | ||
6485911a | 384 | BUG_ON(skb == NULL); |
1da177e4 LT |
385 | |
386 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
387 | ||
388 | dma_unmap_single(&adapter->vdev->dev, | |
389 | adapter->rx_buff_pool[pool].dma_addr[index], | |
390 | adapter->rx_buff_pool[pool].buff_size, | |
391 | DMA_FROM_DEVICE); | |
392 | ||
047a66d4 | 393 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
394 | adapter->rx_buff_pool[pool].producer_index++; |
395 | if (adapter->rx_buff_pool[pool].producer_index >= | |
396 | adapter->rx_buff_pool[pool].size) | |
397 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
398 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
399 | ||
400 | mb(); | |
401 | ||
402 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
403 | } | |
404 | ||
405 | /* get the current buffer on the rx queue */ | |
406 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
407 | { | |
408 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
409 | unsigned int pool = correlator >> 32; | |
410 | unsigned int index = correlator & 0xffffffffUL; | |
411 | ||
6485911a SL |
412 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
413 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
414 | |
415 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
416 | } | |
417 | ||
418 | /* recycle the current buffer on the rx queue */ | |
c6f59d13 | 419 | static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
420 | { |
421 | u32 q_index = adapter->rx_queue.index; | |
422 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
423 | unsigned int pool = correlator >> 32; | |
424 | unsigned int index = correlator & 0xffffffffUL; | |
425 | union ibmveth_buf_desc desc; | |
426 | unsigned long lpar_rc; | |
c6f59d13 | 427 | int ret = 1; |
1da177e4 | 428 | |
6485911a SL |
429 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
430 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 | 431 | |
f148f61d | 432 | if (!adapter->rx_buff_pool[pool].active) { |
b6d35182 SL |
433 | ibmveth_rxq_harvest_buffer(adapter); |
434 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
c6f59d13 | 435 | goto out; |
b6d35182 SL |
436 | } |
437 | ||
79ef4a4d BK |
438 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
439 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
440 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
441 | ||
442 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 443 | |
f148f61d | 444 | if (lpar_rc != H_SUCCESS) { |
c43ced18 SL |
445 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
446 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 | 447 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
c6f59d13 | 448 | ret = 0; |
1da177e4 LT |
449 | } |
450 | ||
f148f61d | 451 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
452 | adapter->rx_queue.index = 0; |
453 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
454 | } | |
c6f59d13 AB |
455 | |
456 | out: | |
457 | return ret; | |
1da177e4 LT |
458 | } |
459 | ||
493a684a | 460 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
461 | { |
462 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
463 | ||
f148f61d | 464 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
465 | adapter->rx_queue.index = 0; |
466 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
467 | } | |
468 | } | |
469 | ||
470 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
471 | { | |
b6d35182 | 472 | int i; |
8d8bb39b | 473 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 474 | |
f148f61d | 475 | if (adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
476 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
477 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
478 | DMA_BIDIRECTIONAL); |
479 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
480 | } | |
481 | free_page((unsigned long)adapter->buffer_list_addr); | |
482 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 483 | } |
1da177e4 | 484 | |
f148f61d | 485 | if (adapter->filter_list_addr != NULL) { |
8d8bb39b FT |
486 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
487 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
488 | DMA_BIDIRECTIONAL); |
489 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
490 | } | |
491 | free_page((unsigned long)adapter->filter_list_addr); | |
492 | adapter->filter_list_addr = NULL; | |
493 | } | |
494 | ||
f148f61d | 495 | if (adapter->rx_queue.queue_addr != NULL) { |
d90c92fe SL |
496 | dma_free_coherent(dev, adapter->rx_queue.queue_len, |
497 | adapter->rx_queue.queue_addr, | |
498 | adapter->rx_queue.queue_dma); | |
1da177e4 LT |
499 | adapter->rx_queue.queue_addr = NULL; |
500 | } | |
501 | ||
f148f61d | 502 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
860f242e | 503 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 504 | ibmveth_free_buffer_pool(adapter, |
860f242e | 505 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
506 | |
507 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 508 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
509 | dma_unmap_single(&adapter->vdev->dev, |
510 | adapter->bounce_buffer_dma, | |
511 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
512 | DMA_BIDIRECTIONAL); | |
513 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
514 | } | |
515 | kfree(adapter->bounce_buffer); | |
516 | adapter->bounce_buffer = NULL; | |
517 | } | |
1da177e4 LT |
518 | } |
519 | ||
bbedefcc ME |
520 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
521 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
522 | { | |
523 | int rc, try_again = 1; | |
524 | ||
f148f61d SL |
525 | /* |
526 | * After a kexec the adapter will still be open, so our attempt to | |
527 | * open it will fail. So if we get a failure we free the adapter and | |
528 | * try again, but only once. | |
529 | */ | |
bbedefcc ME |
530 | retry: |
531 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
532 | adapter->buffer_list_dma, rxq_desc.desc, | |
533 | adapter->filter_list_dma, mac_address); | |
534 | ||
535 | if (rc != H_SUCCESS && try_again) { | |
536 | do { | |
537 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
538 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
539 | ||
540 | try_again = 0; | |
541 | goto retry; | |
542 | } | |
543 | ||
544 | return rc; | |
545 | } | |
546 | ||
d746ca95 AB |
547 | static u64 ibmveth_encode_mac_addr(u8 *mac) |
548 | { | |
549 | int i; | |
550 | u64 encoded = 0; | |
551 | ||
552 | for (i = 0; i < ETH_ALEN; i++) | |
553 | encoded = (encoded << 8) | mac[i]; | |
554 | ||
555 | return encoded; | |
556 | } | |
557 | ||
1da177e4 LT |
558 | static int ibmveth_open(struct net_device *netdev) |
559 | { | |
4cf1653a | 560 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
d746ca95 | 561 | u64 mac_address; |
b6d35182 | 562 | int rxq_entries = 1; |
1da177e4 LT |
563 | unsigned long lpar_rc; |
564 | int rc; | |
565 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 566 | int i; |
8d8bb39b | 567 | struct device *dev; |
1da177e4 | 568 | |
c43ced18 | 569 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 570 | |
bea3348e SH |
571 | napi_enable(&adapter->napi); |
572 | ||
517e80e6 | 573 | for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
b6d35182 | 574 | rxq_entries += adapter->rx_buff_pool[i].size; |
d7fbeba6 | 575 | |
1da177e4 LT |
576 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
577 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 578 | |
f148f61d | 579 | if (!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
21c2dece SL |
580 | netdev_err(netdev, "unable to allocate filter or buffer list " |
581 | "pages\n"); | |
88426f2a DK |
582 | rc = -ENOMEM; |
583 | goto err_out; | |
1da177e4 LT |
584 | } |
585 | ||
d90c92fe SL |
586 | dev = &adapter->vdev->dev; |
587 | ||
f148f61d SL |
588 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
589 | rxq_entries; | |
d90c92fe | 590 | adapter->rx_queue.queue_addr = |
d0320f75 JP |
591 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
592 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
f148f61d | 593 | if (!adapter->rx_queue.queue_addr) { |
88426f2a DK |
594 | rc = -ENOMEM; |
595 | goto err_out; | |
1da177e4 LT |
596 | } |
597 | ||
8d8bb39b | 598 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 599 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 600 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 601 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
1da177e4 | 602 | |
8d8bb39b | 603 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
d90c92fe | 604 | (dma_mapping_error(dev, adapter->filter_list_dma))) { |
21c2dece SL |
605 | netdev_err(netdev, "unable to map filter or buffer list " |
606 | "pages\n"); | |
88426f2a DK |
607 | rc = -ENOMEM; |
608 | goto err_out; | |
1da177e4 LT |
609 | } |
610 | ||
611 | adapter->rx_queue.index = 0; | |
612 | adapter->rx_queue.num_slots = rxq_entries; | |
613 | adapter->rx_queue.toggle = 1; | |
614 | ||
d746ca95 | 615 | mac_address = ibmveth_encode_mac_addr(netdev->dev_addr); |
1da177e4 | 616 | |
f148f61d SL |
617 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
618 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
619 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
620 | ||
c43ced18 SL |
621 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
622 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
623 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 624 | |
4347ef15 SL |
625 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
626 | ||
bbedefcc | 627 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 628 | |
f148f61d | 629 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
630 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
631 | lpar_rc); | |
632 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
633 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
634 | adapter->buffer_list_dma, |
635 | adapter->filter_list_dma, | |
636 | rxq_desc.desc, | |
637 | mac_address); | |
88426f2a DK |
638 | rc = -ENONET; |
639 | goto err_out; | |
1da177e4 LT |
640 | } |
641 | ||
f148f61d SL |
642 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
643 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
644 | continue; |
645 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 646 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 647 | adapter->rx_buff_pool[i].active = 0; |
88426f2a DK |
648 | rc = -ENOMEM; |
649 | goto err_out; | |
860f242e SL |
650 | } |
651 | } | |
652 | ||
c43ced18 | 653 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
654 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
655 | netdev); | |
656 | if (rc != 0) { | |
21c2dece SL |
657 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
658 | netdev->irq, rc); | |
1da177e4 | 659 | do { |
95de86cf BK |
660 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
661 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 662 | |
88426f2a | 663 | goto err_out; |
1da177e4 LT |
664 | } |
665 | ||
1096d63d RJ |
666 | adapter->bounce_buffer = |
667 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
668 | if (!adapter->bounce_buffer) { | |
88426f2a | 669 | rc = -ENOMEM; |
e0e8ab59 | 670 | goto err_out_free_irq; |
1096d63d RJ |
671 | } |
672 | adapter->bounce_buffer_dma = | |
673 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
674 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 675 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 676 | netdev_err(netdev, "unable to map bounce buffer\n"); |
88426f2a | 677 | rc = -ENOMEM; |
e0e8ab59 | 678 | goto err_out_free_irq; |
1096d63d RJ |
679 | } |
680 | ||
c43ced18 | 681 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 682 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 683 | |
e2adbcb4 | 684 | netif_start_queue(netdev); |
1da177e4 | 685 | |
c43ced18 | 686 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
687 | |
688 | return 0; | |
88426f2a | 689 | |
e0e8ab59 DK |
690 | err_out_free_irq: |
691 | free_irq(netdev->irq, netdev); | |
88426f2a DK |
692 | err_out: |
693 | ibmveth_cleanup(adapter); | |
694 | napi_disable(&adapter->napi); | |
695 | return rc; | |
1da177e4 LT |
696 | } |
697 | ||
698 | static int ibmveth_close(struct net_device *netdev) | |
699 | { | |
4cf1653a | 700 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 701 | long lpar_rc; |
d7fbeba6 | 702 | |
c43ced18 | 703 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 704 | |
bea3348e SH |
705 | napi_disable(&adapter->napi); |
706 | ||
860f242e SL |
707 | if (!adapter->pool_config) |
708 | netif_stop_queue(netdev); | |
1da177e4 | 709 | |
ee2e6114 | 710 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 711 | |
1da177e4 LT |
712 | do { |
713 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 714 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 715 | |
f148f61d | 716 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
717 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
718 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
719 | } |
720 | ||
ee2e6114 RJ |
721 | free_irq(netdev->irq, netdev); |
722 | ||
cbd52281 | 723 | ibmveth_update_rx_no_buffer(adapter); |
1da177e4 LT |
724 | |
725 | ibmveth_cleanup(adapter); | |
726 | ||
c43ced18 | 727 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
728 | |
729 | return 0; | |
730 | } | |
731 | ||
9ce8c2df PR |
732 | static int netdev_get_link_ksettings(struct net_device *dev, |
733 | struct ethtool_link_ksettings *cmd) | |
f148f61d | 734 | { |
9ce8c2df PR |
735 | u32 supported, advertising; |
736 | ||
737 | supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | | |
f148f61d | 738 | SUPPORTED_FIBRE); |
9ce8c2df | 739 | advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | |
f148f61d | 740 | ADVERTISED_FIBRE); |
9ce8c2df PR |
741 | cmd->base.speed = SPEED_1000; |
742 | cmd->base.duplex = DUPLEX_FULL; | |
743 | cmd->base.port = PORT_FIBRE; | |
744 | cmd->base.phy_address = 0; | |
745 | cmd->base.autoneg = AUTONEG_ENABLE; | |
746 | ||
747 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, | |
748 | supported); | |
749 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, | |
750 | advertising); | |
751 | ||
1da177e4 LT |
752 | return 0; |
753 | } | |
754 | ||
f148f61d SL |
755 | static void netdev_get_drvinfo(struct net_device *dev, |
756 | struct ethtool_drvinfo *info) | |
757 | { | |
7826d43f JP |
758 | strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
759 | strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); | |
1da177e4 LT |
760 | } |
761 | ||
c8f44aff MM |
762 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
763 | netdev_features_t features) | |
5fc7e01c | 764 | { |
b9367bf3 MM |
765 | /* |
766 | * Since the ibmveth firmware interface does not have the | |
767 | * concept of separate tx/rx checksum offload enable, if rx | |
768 | * checksum is disabled we also have to disable tx checksum | |
769 | * offload. Once we disable rx checksum offload, we are no | |
770 | * longer allowed to send tx buffers that are not properly | |
771 | * checksummed. | |
772 | */ | |
5fc7e01c | 773 | |
b9367bf3 | 774 | if (!(features & NETIF_F_RXCSUM)) |
a188222b | 775 | features &= ~NETIF_F_CSUM_MASK; |
5fc7e01c | 776 | |
b9367bf3 | 777 | return features; |
5fc7e01c BK |
778 | } |
779 | ||
b9367bf3 | 780 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 781 | { |
4cf1653a | 782 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 783 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 784 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 785 | long ret, ret4, ret6; |
5fc7e01c BK |
786 | int rc1 = 0, rc2 = 0; |
787 | int restart = 0; | |
788 | ||
789 | if (netif_running(dev)) { | |
790 | restart = 1; | |
791 | adapter->pool_config = 1; | |
792 | ibmveth_close(dev); | |
793 | adapter->pool_config = 0; | |
794 | } | |
795 | ||
79ef4a4d BK |
796 | set_attr = 0; |
797 | clr_attr = 0; | |
fb82fd20 AB |
798 | set_attr6 = 0; |
799 | clr_attr6 = 0; | |
5fc7e01c | 800 | |
ab78df75 | 801 | if (data) { |
79ef4a4d | 802 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
803 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
804 | } else { | |
79ef4a4d | 805 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
806 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
807 | } | |
5fc7e01c | 808 | |
79ef4a4d | 809 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 810 | |
79ef4a4d BK |
811 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
812 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
813 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
fb82fd20 | 814 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 815 | set_attr, &ret_attr); |
5fc7e01c | 816 | |
fb82fd20 | 817 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
818 | netdev_err(dev, "unable to change IPv4 checksum " |
819 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
820 | data, ret4); |
821 | ||
822 | h_illan_attributes(adapter->vdev->unit_address, | |
823 | set_attr, clr_attr, &ret_attr); | |
824 | ||
825 | if (data == 1) | |
826 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 827 | |
f148f61d | 828 | } else { |
ab78df75 | 829 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 830 | } |
ab78df75 SL |
831 | |
832 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
833 | clr_attr6, set_attr6, &ret_attr); | |
834 | ||
835 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
836 | netdev_err(dev, "unable to change IPv6 checksum " |
837 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
838 | data, ret6); |
839 | ||
840 | h_illan_attributes(adapter->vdev->unit_address, | |
841 | set_attr6, clr_attr6, &ret_attr); | |
842 | ||
843 | if (data == 1) | |
844 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 845 | |
ab78df75 SL |
846 | } else |
847 | adapter->fw_ipv6_csum_support = data; | |
848 | ||
fb82fd20 | 849 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 850 | adapter->rx_csum = data; |
ab78df75 SL |
851 | else |
852 | rc1 = -EIO; | |
5fc7e01c BK |
853 | } else { |
854 | rc1 = -EIO; | |
21c2dece SL |
855 | netdev_err(dev, "unable to change checksum offload settings." |
856 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
857 | ret_attr); | |
5fc7e01c BK |
858 | } |
859 | ||
860 | if (restart) | |
861 | rc2 = ibmveth_open(dev); | |
862 | ||
863 | return rc1 ? rc1 : rc2; | |
864 | } | |
865 | ||
07e6a97d TF |
866 | static int ibmveth_set_tso(struct net_device *dev, u32 data) |
867 | { | |
868 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
869 | unsigned long set_attr, clr_attr, ret_attr; | |
870 | long ret1, ret2; | |
871 | int rc1 = 0, rc2 = 0; | |
872 | int restart = 0; | |
873 | ||
874 | if (netif_running(dev)) { | |
875 | restart = 1; | |
876 | adapter->pool_config = 1; | |
877 | ibmveth_close(dev); | |
878 | adapter->pool_config = 0; | |
879 | } | |
880 | ||
881 | set_attr = 0; | |
882 | clr_attr = 0; | |
883 | ||
884 | if (data) | |
885 | set_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; | |
886 | else | |
887 | clr_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; | |
888 | ||
889 | ret1 = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); | |
890 | ||
891 | if (ret1 == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && | |
892 | !old_large_send) { | |
893 | ret2 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
894 | set_attr, &ret_attr); | |
895 | ||
896 | if (ret2 != H_SUCCESS) { | |
897 | netdev_err(dev, "unable to change tso settings. %d rc=%ld\n", | |
898 | data, ret2); | |
899 | ||
900 | h_illan_attributes(adapter->vdev->unit_address, | |
901 | set_attr, clr_attr, &ret_attr); | |
902 | ||
903 | if (data == 1) | |
904 | dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
905 | rc1 = -EIO; | |
906 | ||
907 | } else { | |
908 | adapter->fw_large_send_support = data; | |
909 | adapter->large_send = data; | |
910 | } | |
911 | } else { | |
912 | /* Older firmware version of large send offload does not | |
913 | * support tcp6/ipv6 | |
914 | */ | |
915 | if (data == 1) { | |
916 | dev->features &= ~NETIF_F_TSO6; | |
917 | netdev_info(dev, "TSO feature requires all partitions to have updated driver"); | |
918 | } | |
919 | adapter->large_send = data; | |
920 | } | |
921 | ||
922 | if (restart) | |
923 | rc2 = ibmveth_open(dev); | |
924 | ||
925 | return rc1 ? rc1 : rc2; | |
926 | } | |
927 | ||
c8f44aff MM |
928 | static int ibmveth_set_features(struct net_device *dev, |
929 | netdev_features_t features) | |
5fc7e01c | 930 | { |
4cf1653a | 931 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 | 932 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
07e6a97d TF |
933 | int large_send = !!(features & (NETIF_F_TSO | NETIF_F_TSO6)); |
934 | int rc1 = 0, rc2 = 0; | |
5fc7e01c | 935 | |
07e6a97d TF |
936 | if (rx_csum != adapter->rx_csum) { |
937 | rc1 = ibmveth_set_csum_offload(dev, rx_csum); | |
938 | if (rc1 && !adapter->rx_csum) | |
939 | dev->features = | |
a188222b TH |
940 | features & ~(NETIF_F_CSUM_MASK | |
941 | NETIF_F_RXCSUM); | |
07e6a97d | 942 | } |
5fc7e01c | 943 | |
07e6a97d TF |
944 | if (large_send != adapter->large_send) { |
945 | rc2 = ibmveth_set_tso(dev, large_send); | |
946 | if (rc2 && !adapter->large_send) | |
947 | dev->features = | |
948 | features & ~(NETIF_F_TSO | NETIF_F_TSO6); | |
949 | } | |
5fc7e01c | 950 | |
07e6a97d | 951 | return rc1 ? rc1 : rc2; |
5fc7e01c BK |
952 | } |
953 | ||
ddbb4de9 BK |
954 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
955 | { | |
956 | int i; | |
957 | ||
958 | if (stringset != ETH_SS_STATS) | |
959 | return; | |
960 | ||
961 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
962 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
963 | } | |
964 | ||
b9f2c044 | 965 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 966 | { |
b9f2c044 JG |
967 | switch (sset) { |
968 | case ETH_SS_STATS: | |
969 | return ARRAY_SIZE(ibmveth_stats); | |
970 | default: | |
971 | return -EOPNOTSUPP; | |
972 | } | |
ddbb4de9 BK |
973 | } |
974 | ||
975 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
976 | struct ethtool_stats *stats, u64 *data) | |
977 | { | |
978 | int i; | |
4cf1653a | 979 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
980 | |
981 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
982 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
983 | } | |
984 | ||
7282d491 | 985 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 | 986 | .get_drvinfo = netdev_get_drvinfo, |
ed4ba4b5 | 987 | .get_link = ethtool_op_get_link, |
ddbb4de9 | 988 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 989 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 990 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
9ce8c2df | 991 | .get_link_ksettings = netdev_get_link_ksettings, |
1da177e4 LT |
992 | }; |
993 | ||
994 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
995 | { | |
996 | return -EOPNOTSUPP; | |
997 | } | |
998 | ||
999 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
1000 | ||
6e8ab30e | 1001 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
07e6a97d | 1002 | union ibmveth_buf_desc *descs, unsigned long mss) |
1da177e4 | 1003 | { |
1da177e4 LT |
1004 | unsigned long correlator; |
1005 | unsigned int retry_count; | |
6e8ab30e SL |
1006 | unsigned long ret; |
1007 | ||
1008 | /* | |
1009 | * The retry count sets a maximum for the number of broadcast and | |
1010 | * multicast destinations within the system. | |
1011 | */ | |
1012 | retry_count = 1024; | |
1013 | correlator = 0; | |
1014 | do { | |
1015 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
1016 | descs[0].desc, descs[1].desc, | |
1017 | descs[2].desc, descs[3].desc, | |
1018 | descs[4].desc, descs[5].desc, | |
07e6a97d TF |
1019 | correlator, &correlator, mss, |
1020 | adapter->fw_large_send_support); | |
6e8ab30e SL |
1021 | } while ((ret == H_BUSY) && (retry_count--)); |
1022 | ||
1023 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
1024 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
1025 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
1026 | return 1; |
1027 | } | |
1028 | ||
1029 | return 0; | |
1030 | } | |
60296d9e | 1031 | |
6e8ab30e SL |
1032 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
1033 | struct net_device *netdev) | |
1034 | { | |
1035 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
1036 | unsigned int desc_flags; | |
1037 | union ibmveth_buf_desc descs[6]; | |
1038 | int last, i; | |
1039 | int force_bounce = 0; | |
b93da27f | 1040 | dma_addr_t dma_addr; |
07e6a97d | 1041 | unsigned long mss = 0; |
6e8ab30e SL |
1042 | |
1043 | /* | |
1044 | * veth handles a maximum of 6 segments including the header, so | |
1045 | * we have to linearize the skb if there are more than this. | |
1046 | */ | |
1047 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
1048 | netdev->stats.tx_dropped++; | |
1049 | goto out; | |
1050 | } | |
1da177e4 | 1051 | |
6e8ab30e | 1052 | /* veth can't checksum offload UDP */ |
f4ff2872 | 1053 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
1054 | ((skb->protocol == htons(ETH_P_IP) && |
1055 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
1056 | (skb->protocol == htons(ETH_P_IPV6) && | |
1057 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
1058 | skb_checksum_help(skb)) { | |
1059 | ||
21c2dece | 1060 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 1061 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
1062 | goto out; |
1063 | } | |
1064 | ||
6e8ab30e SL |
1065 | desc_flags = IBMVETH_BUF_VALID; |
1066 | ||
07e6a97d TF |
1067 | if (skb_is_gso(skb) && adapter->fw_large_send_support) |
1068 | desc_flags |= IBMVETH_BUF_LRG_SND; | |
1069 | ||
f4ff2872 | 1070 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
1071 | unsigned char *buf = skb_transport_header(skb) + |
1072 | skb->csum_offset; | |
f4ff2872 | 1073 | |
6e8ab30e | 1074 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
1075 | |
1076 | /* Need to zero out the checksum */ | |
1077 | buf[0] = 0; | |
1078 | buf[1] = 0; | |
1079 | } | |
1080 | ||
6e8ab30e SL |
1081 | retry_bounce: |
1082 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 1083 | |
6e8ab30e SL |
1084 | /* |
1085 | * If a linear packet is below the rx threshold then | |
1086 | * copy it into the static bounce buffer. This avoids the | |
1087 | * cost of a TCE insert and remove. | |
1088 | */ | |
1089 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
1090 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
1091 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
1092 | skb->len); | |
1da177e4 | 1093 | |
6e8ab30e SL |
1094 | descs[0].fields.flags_len = desc_flags | skb->len; |
1095 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
1096 | ||
07e6a97d | 1097 | if (ibmveth_send(adapter, descs, 0)) { |
6e8ab30e SL |
1098 | adapter->tx_send_failed++; |
1099 | netdev->stats.tx_dropped++; | |
1100 | } else { | |
1101 | netdev->stats.tx_packets++; | |
1102 | netdev->stats.tx_bytes += skb->len; | |
1103 | } | |
1104 | ||
1105 | goto out; | |
1106 | } | |
1107 | ||
1108 | /* Map the header */ | |
b93da27f AB |
1109 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
1110 | skb_headlen(skb), DMA_TO_DEVICE); | |
1111 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
6e8ab30e SL |
1112 | goto map_failed; |
1113 | ||
1114 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
b93da27f | 1115 | descs[0].fields.address = dma_addr; |
6e8ab30e SL |
1116 | |
1117 | /* Map the frags */ | |
1118 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 1119 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
6e8ab30e | 1120 | |
8838a538 | 1121 | dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
9e903e08 | 1122 | skb_frag_size(frag), DMA_TO_DEVICE); |
6e8ab30e SL |
1123 | |
1124 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1125 | goto map_failed_frags; | |
1126 | ||
9e903e08 | 1127 | descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
6e8ab30e SL |
1128 | descs[i+1].fields.address = dma_addr; |
1129 | } | |
1130 | ||
07e6a97d TF |
1131 | if (skb_is_gso(skb)) { |
1132 | if (adapter->fw_large_send_support) { | |
1133 | mss = (unsigned long)skb_shinfo(skb)->gso_size; | |
1134 | adapter->tx_large_packets++; | |
1135 | } else if (!skb_is_gso_v6(skb)) { | |
1136 | /* Put -1 in the IP checksum to tell phyp it | |
1137 | * is a largesend packet. Put the mss in | |
1138 | * the TCP checksum. | |
1139 | */ | |
1140 | ip_hdr(skb)->check = 0xffff; | |
1141 | tcp_hdr(skb)->check = | |
1142 | cpu_to_be16(skb_shinfo(skb)->gso_size); | |
1143 | adapter->tx_large_packets++; | |
1144 | } | |
8641dd85 TF |
1145 | } |
1146 | ||
07e6a97d | 1147 | if (ibmveth_send(adapter, descs, mss)) { |
6e8ab30e SL |
1148 | adapter->tx_send_failed++; |
1149 | netdev->stats.tx_dropped++; | |
1da177e4 | 1150 | } else { |
6e8ab30e SL |
1151 | netdev->stats.tx_packets++; |
1152 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1153 | } |
1154 | ||
33a48ab1 BK |
1155 | dma_unmap_single(&adapter->vdev->dev, |
1156 | descs[0].fields.address, | |
1157 | descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1158 | DMA_TO_DEVICE); | |
1159 | ||
1160 | for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) | |
6e8ab30e SL |
1161 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, |
1162 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1163 | DMA_TO_DEVICE); | |
1da177e4 | 1164 | |
e8cb7eb4 | 1165 | out: |
26faa9d7 | 1166 | dev_consume_skb_any(skb); |
6ed10654 | 1167 | return NETDEV_TX_OK; |
6e8ab30e SL |
1168 | |
1169 | map_failed_frags: | |
1170 | last = i+1; | |
1171 | for (i = 0; i < last; i++) | |
1172 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1173 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1174 | DMA_TO_DEVICE); | |
1175 | ||
1176 | map_failed: | |
1177 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1178 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e | 1179 | adapter->tx_map_failed++; |
2c42bf4b TF |
1180 | if (skb_linearize(skb)) { |
1181 | netdev->stats.tx_dropped++; | |
1182 | goto out; | |
1183 | } | |
6e8ab30e SL |
1184 | force_bounce = 1; |
1185 | goto retry_bounce; | |
1da177e4 LT |
1186 | } |
1187 | ||
7b596738 TF |
1188 | static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt) |
1189 | { | |
94acf164 | 1190 | struct tcphdr *tcph; |
7b596738 | 1191 | int offset = 0; |
94acf164 | 1192 | int hdr_len; |
7b596738 TF |
1193 | |
1194 | /* only TCP packets will be aggregated */ | |
1195 | if (skb->protocol == htons(ETH_P_IP)) { | |
1196 | struct iphdr *iph = (struct iphdr *)skb->data; | |
1197 | ||
1198 | if (iph->protocol == IPPROTO_TCP) { | |
1199 | offset = iph->ihl * 4; | |
1200 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; | |
1201 | } else { | |
1202 | return; | |
1203 | } | |
1204 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
1205 | struct ipv6hdr *iph6 = (struct ipv6hdr *)skb->data; | |
1206 | ||
1207 | if (iph6->nexthdr == IPPROTO_TCP) { | |
1208 | offset = sizeof(struct ipv6hdr); | |
1209 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; | |
1210 | } else { | |
1211 | return; | |
1212 | } | |
1213 | } else { | |
1214 | return; | |
1215 | } | |
1216 | /* if mss is not set through Large Packet bit/mss in rx buffer, | |
1217 | * expect that the mss will be written to the tcp header checksum. | |
1218 | */ | |
94acf164 | 1219 | tcph = (struct tcphdr *)(skb->data + offset); |
7b596738 TF |
1220 | if (lrg_pkt) { |
1221 | skb_shinfo(skb)->gso_size = mss; | |
1222 | } else if (offset) { | |
7b596738 TF |
1223 | skb_shinfo(skb)->gso_size = ntohs(tcph->check); |
1224 | tcph->check = 0; | |
1225 | } | |
94acf164 TF |
1226 | |
1227 | if (skb_shinfo(skb)->gso_size) { | |
1228 | hdr_len = offset + tcph->doff * 4; | |
1229 | skb_shinfo(skb)->gso_segs = | |
1230 | DIV_ROUND_UP(skb->len - hdr_len, | |
1231 | skb_shinfo(skb)->gso_size); | |
1232 | } | |
7b596738 TF |
1233 | } |
1234 | ||
bea3348e | 1235 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1236 | { |
f148f61d SL |
1237 | struct ibmveth_adapter *adapter = |
1238 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1239 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1240 | int frames_processed = 0; |
1da177e4 | 1241 | unsigned long lpar_rc; |
9c7e8bc5 | 1242 | struct iphdr *iph; |
7b596738 | 1243 | u16 mss = 0; |
1da177e4 | 1244 | |
f148f61d | 1245 | restart_poll: |
cb013ea1 | 1246 | while (frames_processed < budget) { |
bea3348e SH |
1247 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1248 | break; | |
1da177e4 | 1249 | |
f89e49e7 | 1250 | smp_rmb(); |
bea3348e SH |
1251 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1252 | wmb(); /* suggested by larson1 */ | |
1253 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1254 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1255 | ibmveth_rxq_recycle_buffer(adapter); |
1256 | } else { | |
8d86c61a | 1257 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1258 | int length = ibmveth_rxq_frame_length(adapter); |
1259 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 | 1260 | int csum_good = ibmveth_rxq_csum_good(adapter); |
7b596738 | 1261 | int lrg_pkt = ibmveth_rxq_large_packet(adapter); |
f4ff2872 | 1262 | |
bea3348e | 1263 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1264 | |
7b596738 TF |
1265 | /* if the large packet bit is set in the rx queue |
1266 | * descriptor, the mss will be written by PHYP eight | |
1267 | * bytes from the start of the rx buffer, which is | |
1268 | * skb->data at this stage | |
1269 | */ | |
1270 | if (lrg_pkt) { | |
1271 | __be64 *rxmss = (__be64 *)(skb->data + 8); | |
1272 | ||
1273 | mss = (u16)be64_to_cpu(*rxmss); | |
1274 | } | |
1275 | ||
8d86c61a SL |
1276 | new_skb = NULL; |
1277 | if (length < rx_copybreak) | |
1278 | new_skb = netdev_alloc_skb(netdev, length); | |
1279 | ||
1280 | if (new_skb) { | |
1281 | skb_copy_to_linear_data(new_skb, | |
1282 | skb->data + offset, | |
1283 | length); | |
0c26b677 SL |
1284 | if (rx_flush) |
1285 | ibmveth_flush_buffer(skb->data, | |
1286 | length + offset); | |
c6f59d13 AB |
1287 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1288 | kfree_skb(skb); | |
8d86c61a | 1289 | skb = new_skb; |
8d86c61a SL |
1290 | } else { |
1291 | ibmveth_rxq_harvest_buffer(adapter); | |
1292 | skb_reserve(skb, offset); | |
1293 | } | |
1da177e4 | 1294 | |
bea3348e SH |
1295 | skb_put(skb, length); |
1296 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1297 | |
9c7e8bc5 | 1298 | if (csum_good) { |
8d86c61a | 1299 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
9c7e8bc5 TF |
1300 | if (be16_to_cpu(skb->protocol) == ETH_P_IP) { |
1301 | iph = (struct iphdr *)skb->data; | |
1302 | ||
1303 | /* If the IP checksum is not offloaded and if the packet | |
1304 | * is large send, the checksum must be rebuilt. | |
1305 | */ | |
1306 | if (iph->check == 0xffff) { | |
1307 | iph->check = 0; | |
1308 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); | |
9c7e8bc5 TF |
1309 | } |
1310 | } | |
1311 | } | |
8d86c61a | 1312 | |
7b596738 TF |
1313 | if (length > netdev->mtu + ETH_HLEN) { |
1314 | ibmveth_rx_mss_helper(skb, mss, lrg_pkt); | |
1315 | adapter->rx_large_packets++; | |
1316 | } | |
1317 | ||
92ec8279 | 1318 | napi_gro_receive(napi, skb); /* send it up */ |
1da177e4 | 1319 | |
09f75cd7 JG |
1320 | netdev->stats.rx_packets++; |
1321 | netdev->stats.rx_bytes += length; | |
bea3348e | 1322 | frames_processed++; |
1da177e4 | 1323 | } |
cb013ea1 | 1324 | } |
1da177e4 | 1325 | |
e2adbcb4 | 1326 | ibmveth_replenish_task(adapter); |
1da177e4 | 1327 | |
bea3348e | 1328 | if (frames_processed < budget) { |
6ad20165 | 1329 | napi_complete_done(napi, frames_processed); |
4736edc7 | 1330 | |
bea3348e SH |
1331 | /* We think we are done - reenable interrupts, |
1332 | * then check once more to make sure we are done. | |
1333 | */ | |
1334 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1335 | VIO_IRQ_ENABLE); | |
1da177e4 | 1336 | |
6485911a | 1337 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1338 | |
bea3348e | 1339 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1340 | napi_reschedule(napi)) { |
bea3348e SH |
1341 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1342 | VIO_IRQ_DISABLE); | |
1343 | goto restart_poll; | |
1344 | } | |
1da177e4 LT |
1345 | } |
1346 | ||
bea3348e | 1347 | return frames_processed; |
1da177e4 LT |
1348 | } |
1349 | ||
7d12e780 | 1350 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1351 | { |
1da177e4 | 1352 | struct net_device *netdev = dev_instance; |
4cf1653a | 1353 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1354 | unsigned long lpar_rc; |
1355 | ||
288379f0 | 1356 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1357 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1358 | VIO_IRQ_DISABLE); | |
6485911a | 1359 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1360 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1361 | } |
1362 | return IRQ_HANDLED; | |
1363 | } | |
1364 | ||
1da177e4 LT |
1365 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1366 | { | |
4cf1653a | 1367 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1368 | unsigned long lpar_rc; |
1369 | ||
4cd24eaf JP |
1370 | if ((netdev->flags & IFF_PROMISC) || |
1371 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1372 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1373 | IbmVethMcastEnableRecv | | |
1374 | IbmVethMcastDisableFiltering, | |
1375 | 0); | |
f148f61d | 1376 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1377 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1378 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1379 | } |
1380 | } else { | |
22bedad3 | 1381 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1382 | /* clear the filter table & disable filtering */ |
1383 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1384 | IbmVethMcastEnableRecv | | |
1385 | IbmVethMcastDisableFiltering | | |
1386 | IbmVethMcastClearFilterTable, | |
1387 | 0); | |
f148f61d | 1388 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1389 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1390 | "attempting to clear filter table\n", | |
1391 | lpar_rc); | |
1da177e4 LT |
1392 | } |
1393 | /* add the addresses to the filter table */ | |
22bedad3 | 1394 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1395 | /* add the multicast address to the filter table */ |
d746ca95 AB |
1396 | u64 mcast_addr; |
1397 | mcast_addr = ibmveth_encode_mac_addr(ha->addr); | |
1da177e4 LT |
1398 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1399 | IbmVethMcastAddFilter, | |
1400 | mcast_addr); | |
f148f61d | 1401 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1402 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1403 | "when adding an entry to the filter " | |
1404 | "table\n", lpar_rc); | |
1da177e4 LT |
1405 | } |
1406 | } | |
d7fbeba6 | 1407 | |
1da177e4 LT |
1408 | /* re-enable filtering */ |
1409 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1410 | IbmVethMcastEnableFiltering, | |
1411 | 0); | |
f148f61d | 1412 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1413 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1414 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1415 | } |
1416 | } | |
1417 | } | |
1418 | ||
1419 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1420 | { | |
4cf1653a | 1421 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1422 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1423 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1424 | int i, rc; |
1425 | int need_restart = 0; | |
b6d35182 | 1426 | |
517e80e6 | 1427 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
4fce1482 | 1428 | if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) |
ce6eea58 BK |
1429 | break; |
1430 | ||
517e80e6 | 1431 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1432 | return -EINVAL; |
1433 | ||
ea866e65 SL |
1434 | /* Deactivate all the buffer pools so that the next loop can activate |
1435 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1436 | if (netif_running(adapter->netdev)) { |
1437 | need_restart = 1; | |
1438 | adapter->pool_config = 1; | |
1439 | ibmveth_close(adapter->netdev); | |
1440 | adapter->pool_config = 0; | |
1441 | } | |
ea866e65 | 1442 | |
860f242e | 1443 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1444 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1445 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1446 | |
4fce1482 | 1447 | if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1448 | dev->mtu = new_mtu; |
1449 | vio_cmo_set_dev_desired(viodev, | |
1450 | ibmveth_get_desired_dma | |
1451 | (viodev)); | |
0645bab7 RJ |
1452 | if (need_restart) { |
1453 | return ibmveth_open(adapter->netdev); | |
1454 | } | |
860f242e | 1455 | return 0; |
b6d35182 | 1456 | } |
b6d35182 | 1457 | } |
0645bab7 RJ |
1458 | |
1459 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1460 | return rc; | |
1461 | ||
860f242e | 1462 | return -EINVAL; |
1da177e4 LT |
1463 | } |
1464 | ||
6b422374 SL |
1465 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1466 | static void ibmveth_poll_controller(struct net_device *dev) | |
1467 | { | |
4cf1653a | 1468 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1469 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1470 | } |
1471 | #endif | |
1472 | ||
1096d63d RJ |
1473 | /** |
1474 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1475 | * | |
1476 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1477 | * | |
1478 | * Return value: | |
1479 | * Number of bytes of IO data the driver will need to perform well. | |
1480 | */ | |
1481 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1482 | { | |
1483 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1484 | struct ibmveth_adapter *adapter; | |
d0847757 | 1485 | struct iommu_table *tbl; |
1096d63d RJ |
1486 | unsigned long ret; |
1487 | int i; | |
1488 | int rxqentries = 1; | |
1489 | ||
d0847757 AP |
1490 | tbl = get_iommu_table_base(&vdev->dev); |
1491 | ||
1096d63d RJ |
1492 | /* netdev inits at probe time along with the structures we need below*/ |
1493 | if (netdev == NULL) | |
d0847757 | 1494 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); |
1096d63d RJ |
1495 | |
1496 | adapter = netdev_priv(netdev); | |
1497 | ||
1498 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
d0847757 | 1499 | ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); |
1096d63d | 1500 | |
517e80e6 | 1501 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1502 | /* add the size of the active receive buffers */ |
1503 | if (adapter->rx_buff_pool[i].active) | |
1504 | ret += | |
1505 | adapter->rx_buff_pool[i].size * | |
1506 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
d0847757 | 1507 | buff_size, tbl); |
1096d63d RJ |
1508 | rxqentries += adapter->rx_buff_pool[i].size; |
1509 | } | |
1510 | /* add the size of the receive queue entries */ | |
d0847757 AP |
1511 | ret += IOMMU_PAGE_ALIGN( |
1512 | rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); | |
1096d63d RJ |
1513 | |
1514 | return ret; | |
1515 | } | |
1516 | ||
c77c761f TF |
1517 | static int ibmveth_set_mac_addr(struct net_device *dev, void *p) |
1518 | { | |
1519 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
1520 | struct sockaddr *addr = p; | |
1521 | u64 mac_address; | |
1522 | int rc; | |
1523 | ||
1524 | if (!is_valid_ether_addr(addr->sa_data)) | |
1525 | return -EADDRNOTAVAIL; | |
1526 | ||
1527 | mac_address = ibmveth_encode_mac_addr(addr->sa_data); | |
1528 | rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address); | |
1529 | if (rc) { | |
1530 | netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc); | |
1531 | return rc; | |
1532 | } | |
1533 | ||
1534 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
e186d174 AB |
1539 | static const struct net_device_ops ibmveth_netdev_ops = { |
1540 | .ndo_open = ibmveth_open, | |
1541 | .ndo_stop = ibmveth_close, | |
1542 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1543 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
e186d174 AB |
1544 | .ndo_do_ioctl = ibmveth_ioctl, |
1545 | .ndo_change_mtu = ibmveth_change_mtu, | |
b9367bf3 MM |
1546 | .ndo_fix_features = ibmveth_fix_features, |
1547 | .ndo_set_features = ibmveth_set_features, | |
e186d174 | 1548 | .ndo_validate_addr = eth_validate_addr, |
c77c761f | 1549 | .ndo_set_mac_address = ibmveth_set_mac_addr, |
e186d174 AB |
1550 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1551 | .ndo_poll_controller = ibmveth_poll_controller, | |
1552 | #endif | |
1553 | }; | |
1554 | ||
1dd06ae8 | 1555 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1556 | { |
13f85203 | 1557 | int rc, i, mac_len; |
1da177e4 | 1558 | struct net_device *netdev; |
9dc83afd | 1559 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1560 | unsigned char *mac_addr_p; |
1561 | unsigned int *mcastFilterSize_p; | |
07e6a97d TF |
1562 | long ret; |
1563 | unsigned long ret_attr; | |
1da177e4 | 1564 | |
c43ced18 SL |
1565 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1566 | dev->unit_address); | |
1da177e4 | 1567 | |
f148f61d | 1568 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
13f85203 | 1569 | &mac_len); |
f148f61d | 1570 | if (!mac_addr_p) { |
21c2dece | 1571 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1572 | return -EINVAL; |
1da177e4 | 1573 | } |
13f85203 BH |
1574 | /* Workaround for old/broken pHyp */ |
1575 | if (mac_len == 8) | |
1576 | mac_addr_p += 2; | |
1577 | else if (mac_len != 6) { | |
1578 | dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", | |
1579 | mac_len); | |
1580 | return -EINVAL; | |
1581 | } | |
d7fbeba6 | 1582 | |
f148f61d | 1583 | mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, |
493a684a | 1584 | VETH_MCAST_FILTER_SIZE, NULL); |
f148f61d | 1585 | if (!mcastFilterSize_p) { |
21c2dece SL |
1586 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1587 | "attribute\n"); | |
be35ae9e | 1588 | return -EINVAL; |
1da177e4 | 1589 | } |
d7fbeba6 | 1590 | |
1da177e4 LT |
1591 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1592 | ||
f148f61d | 1593 | if (!netdev) |
1da177e4 LT |
1594 | return -ENOMEM; |
1595 | ||
4cf1653a | 1596 | adapter = netdev_priv(netdev); |
c7ae011d | 1597 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1598 | |
1599 | adapter->vdev = dev; | |
1600 | adapter->netdev = netdev; | |
f148f61d | 1601 | adapter->mcastFilterSize = *mcastFilterSize_p; |
860f242e | 1602 | adapter->pool_config = 0; |
d7fbeba6 | 1603 | |
bea3348e SH |
1604 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1605 | ||
1da177e4 | 1606 | netdev->irq = dev->irq; |
e186d174 AB |
1607 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1608 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1609 | SET_NETDEV_DEV(netdev, &dev->dev); |
23d28a85 TH |
1610 | netdev->hw_features = NETIF_F_SG; |
1611 | if (vio_get_attribute(dev, "ibm,illan-options", NULL) != NULL) { | |
1612 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | | |
1613 | NETIF_F_RXCSUM; | |
1614 | } | |
07e6a97d | 1615 | |
b9367bf3 | 1616 | netdev->features |= netdev->hw_features; |
1da177e4 | 1617 | |
07e6a97d TF |
1618 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
1619 | ||
1620 | /* If running older firmware, TSO should not be enabled by default */ | |
1621 | if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && | |
1622 | !old_large_send) { | |
1623 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; | |
1624 | netdev->features |= netdev->hw_features; | |
1625 | } else { | |
1626 | netdev->hw_features |= NETIF_F_TSO; | |
1627 | } | |
8641dd85 | 1628 | |
d894be57 | 1629 | netdev->min_mtu = IBMVETH_MIN_MTU; |
110447f8 | 1630 | netdev->max_mtu = ETH_MAX_MTU; |
d894be57 | 1631 | |
d746ca95 | 1632 | memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN); |
1da177e4 | 1633 | |
cd7c7ec3 TF |
1634 | if (firmware_has_feature(FW_FEATURE_CMO)) |
1635 | memcpy(pool_count, pool_count_cmo, sizeof(pool_count)); | |
1636 | ||
f148f61d | 1637 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1638 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1639 | int error; |
1640 | ||
d7fbeba6 JG |
1641 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1642 | pool_count[i], pool_size[i], | |
860f242e | 1643 | pool_active[i]); |
8dde2a96 GKH |
1644 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1645 | &dev->dev.kobj, "pool%d", i); | |
1646 | if (!error) | |
1647 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1648 | } |
1da177e4 | 1649 | |
c43ced18 | 1650 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1651 | |
1da177e4 LT |
1652 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1653 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1654 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1655 | ||
c43ced18 | 1656 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1657 | |
b801a4e7 MM |
1658 | ibmveth_set_features(netdev, netdev->features); |
1659 | ||
1da177e4 LT |
1660 | rc = register_netdev(netdev); |
1661 | ||
f148f61d | 1662 | if (rc) { |
c43ced18 | 1663 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1664 | free_netdev(netdev); |
1665 | return rc; | |
1666 | } | |
1667 | ||
c43ced18 | 1668 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1669 | |
1da177e4 LT |
1670 | return 0; |
1671 | } | |
1672 | ||
e11787a2 | 1673 | static int ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1674 | { |
c7ae011d | 1675 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1676 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1677 | int i; |
1678 | ||
f148f61d | 1679 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1680 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1681 | |
1682 | unregister_netdev(netdev); | |
1683 | ||
1da177e4 | 1684 | free_netdev(netdev); |
1096d63d RJ |
1685 | dev_set_drvdata(&dev->dev, NULL); |
1686 | ||
1da177e4 LT |
1687 | return 0; |
1688 | } | |
1689 | ||
860f242e SL |
1690 | static struct attribute veth_active_attr; |
1691 | static struct attribute veth_num_attr; | |
1692 | static struct attribute veth_size_attr; | |
1693 | ||
f148f61d SL |
1694 | static ssize_t veth_pool_show(struct kobject *kobj, |
1695 | struct attribute *attr, char *buf) | |
860f242e | 1696 | { |
d7fbeba6 | 1697 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1698 | struct ibmveth_buff_pool, |
1699 | kobj); | |
1700 | ||
1701 | if (attr == &veth_active_attr) | |
1702 | return sprintf(buf, "%d\n", pool->active); | |
1703 | else if (attr == &veth_num_attr) | |
1704 | return sprintf(buf, "%d\n", pool->size); | |
1705 | else if (attr == &veth_size_attr) | |
1706 | return sprintf(buf, "%d\n", pool->buff_size); | |
1707 | return 0; | |
1708 | } | |
1709 | ||
f148f61d SL |
1710 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1711 | const char *buf, size_t count) | |
860f242e | 1712 | { |
d7fbeba6 | 1713 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1714 | struct ibmveth_buff_pool, |
1715 | kobj); | |
c7ae011d GKH |
1716 | struct net_device *netdev = dev_get_drvdata( |
1717 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1718 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1719 | long value = simple_strtol(buf, NULL, 10); |
1720 | long rc; | |
1721 | ||
1722 | if (attr == &veth_active_attr) { | |
1723 | if (value && !pool->active) { | |
4aa9c93e | 1724 | if (netif_running(netdev)) { |
f148f61d | 1725 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1726 | netdev_err(netdev, |
1727 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1728 | return -ENOMEM; |
1729 | } | |
1730 | pool->active = 1; | |
1731 | adapter->pool_config = 1; | |
1732 | ibmveth_close(netdev); | |
1733 | adapter->pool_config = 0; | |
1734 | if ((rc = ibmveth_open(netdev))) | |
1735 | return rc; | |
f148f61d | 1736 | } else { |
4aa9c93e | 1737 | pool->active = 1; |
f148f61d | 1738 | } |
860f242e SL |
1739 | } else if (!value && pool->active) { |
1740 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1741 | int i; | |
1742 | /* Make sure there is a buffer pool with buffers that | |
1743 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1744 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1745 | if (pool == &adapter->rx_buff_pool[i]) |
1746 | continue; | |
1747 | if (!adapter->rx_buff_pool[i].active) | |
1748 | continue; | |
76b9cfcc BK |
1749 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1750 | break; | |
860f242e | 1751 | } |
76b9cfcc | 1752 | |
517e80e6 | 1753 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1754 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1755 | return -EPERM; |
1756 | } | |
76b9cfcc | 1757 | |
76b9cfcc BK |
1758 | if (netif_running(netdev)) { |
1759 | adapter->pool_config = 1; | |
1760 | ibmveth_close(netdev); | |
ea866e65 | 1761 | pool->active = 0; |
76b9cfcc BK |
1762 | adapter->pool_config = 0; |
1763 | if ((rc = ibmveth_open(netdev))) | |
1764 | return rc; | |
1765 | } | |
ea866e65 | 1766 | pool->active = 0; |
860f242e SL |
1767 | } |
1768 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1769 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1770 | return -EINVAL; |
f148f61d | 1771 | } else { |
4aa9c93e BK |
1772 | if (netif_running(netdev)) { |
1773 | adapter->pool_config = 1; | |
1774 | ibmveth_close(netdev); | |
1775 | adapter->pool_config = 0; | |
1776 | pool->size = value; | |
1777 | if ((rc = ibmveth_open(netdev))) | |
1778 | return rc; | |
f148f61d | 1779 | } else { |
4aa9c93e | 1780 | pool->size = value; |
f148f61d | 1781 | } |
860f242e SL |
1782 | } |
1783 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1784 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1785 | return -EINVAL; |
f148f61d | 1786 | } else { |
4aa9c93e BK |
1787 | if (netif_running(netdev)) { |
1788 | adapter->pool_config = 1; | |
1789 | ibmveth_close(netdev); | |
1790 | adapter->pool_config = 0; | |
1791 | pool->buff_size = value; | |
1792 | if ((rc = ibmveth_open(netdev))) | |
1793 | return rc; | |
f148f61d | 1794 | } else { |
4aa9c93e | 1795 | pool->buff_size = value; |
f148f61d | 1796 | } |
860f242e SL |
1797 | } |
1798 | } | |
1799 | ||
1800 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1801 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1802 | return count; |
1803 | } | |
1804 | ||
1805 | ||
f148f61d SL |
1806 | #define ATTR(_name, _mode) \ |
1807 | struct attribute veth_##_name##_attr = { \ | |
1808 | .name = __stringify(_name), .mode = _mode, \ | |
1809 | }; | |
860f242e SL |
1810 | |
1811 | static ATTR(active, 0644); | |
1812 | static ATTR(num, 0644); | |
1813 | static ATTR(size, 0644); | |
1814 | ||
f148f61d | 1815 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1816 | &veth_active_attr, |
1817 | &veth_num_attr, | |
1818 | &veth_size_attr, | |
1819 | NULL, | |
1820 | }; | |
1821 | ||
52cf25d0 | 1822 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1823 | .show = veth_pool_show, |
1824 | .store = veth_pool_store, | |
1825 | }; | |
1826 | ||
1827 | static struct kobj_type ktype_veth_pool = { | |
1828 | .release = NULL, | |
1829 | .sysfs_ops = &veth_pool_ops, | |
1830 | .default_attrs = veth_pool_attrs, | |
1831 | }; | |
1832 | ||
e7a3af5d BK |
1833 | static int ibmveth_resume(struct device *dev) |
1834 | { | |
1835 | struct net_device *netdev = dev_get_drvdata(dev); | |
1836 | ibmveth_interrupt(netdev->irq, netdev); | |
1837 | return 0; | |
1838 | } | |
860f242e | 1839 | |
e11787a2 | 1840 | static struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1841 | { "network", "IBM,l-lan"}, |
fb120da6 | 1842 | { "", "" } |
1da177e4 | 1843 | }; |
1da177e4 LT |
1844 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1845 | ||
e7a3af5d BK |
1846 | static struct dev_pm_ops ibmveth_pm_ops = { |
1847 | .resume = ibmveth_resume | |
1848 | }; | |
1849 | ||
1da177e4 | 1850 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1851 | .id_table = ibmveth_device_table, |
1852 | .probe = ibmveth_probe, | |
1853 | .remove = ibmveth_remove, | |
1096d63d | 1854 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1855 | .name = ibmveth_driver_name, |
1856 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1857 | }; |
1858 | ||
1859 | static int __init ibmveth_module_init(void) | |
1860 | { | |
21c2dece SL |
1861 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1862 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1863 | |
1da177e4 LT |
1864 | return vio_register_driver(&ibmveth_driver); |
1865 | } | |
1866 | ||
1867 | static void __exit ibmveth_module_exit(void) | |
1868 | { | |
1869 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1870 | } |
1da177e4 LT |
1871 | |
1872 | module_init(ibmveth_module_init); | |
1873 | module_exit(ibmveth_module_exit); |