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Commit | Line | Data |
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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 | ||
cbd52281 AB |
295 | /* |
296 | * The final 8 bytes of the buffer list is a counter of frames dropped | |
297 | * because there was not a buffer in the buffer list capable of holding | |
298 | * the frame. | |
299 | */ | |
300 | static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter) | |
301 | { | |
302 | __be64 *p = adapter->buffer_list_addr + 4096 - 8; | |
303 | ||
304 | adapter->rx_no_buffer = be64_to_cpup(p); | |
305 | } | |
306 | ||
e2adbcb4 | 307 | /* replenish routine */ |
d7fbeba6 | 308 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 309 | { |
b6d35182 SL |
310 | int i; |
311 | ||
1da177e4 LT |
312 | adapter->replenish_task_cycles++; |
313 | ||
517e80e6 | 314 | for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { |
c033a6d1 SL |
315 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; |
316 | ||
317 | if (pool->active && | |
318 | (atomic_read(&pool->available) < pool->threshold)) | |
319 | ibmveth_replenish_buffer_pool(adapter, pool); | |
320 | } | |
1da177e4 | 321 | |
cbd52281 | 322 | ibmveth_update_rx_no_buffer(adapter); |
1da177e4 LT |
323 | } |
324 | ||
325 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
f148f61d SL |
326 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, |
327 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
328 | { |
329 | int i; | |
330 | ||
b4558ea9 JJ |
331 | kfree(pool->free_map); |
332 | pool->free_map = NULL; | |
1da177e4 | 333 | |
f148f61d SL |
334 | if (pool->skbuff && pool->dma_addr) { |
335 | for (i = 0; i < pool->size; ++i) { | |
1da177e4 | 336 | struct sk_buff *skb = pool->skbuff[i]; |
f148f61d | 337 | if (skb) { |
1da177e4 LT |
338 | dma_unmap_single(&adapter->vdev->dev, |
339 | pool->dma_addr[i], | |
340 | pool->buff_size, | |
341 | DMA_FROM_DEVICE); | |
342 | dev_kfree_skb_any(skb); | |
343 | pool->skbuff[i] = NULL; | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
f148f61d | 348 | if (pool->dma_addr) { |
1da177e4 LT |
349 | kfree(pool->dma_addr); |
350 | pool->dma_addr = NULL; | |
351 | } | |
352 | ||
f148f61d | 353 | if (pool->skbuff) { |
1da177e4 LT |
354 | kfree(pool->skbuff); |
355 | pool->skbuff = NULL; | |
356 | } | |
357 | } | |
358 | ||
359 | /* remove a buffer from a pool */ | |
f148f61d SL |
360 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, |
361 | u64 correlator) | |
1da177e4 LT |
362 | { |
363 | unsigned int pool = correlator >> 32; | |
364 | unsigned int index = correlator & 0xffffffffUL; | |
365 | unsigned int free_index; | |
366 | struct sk_buff *skb; | |
367 | ||
6485911a SL |
368 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
369 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
370 | |
371 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
372 | ||
6485911a | 373 | BUG_ON(skb == NULL); |
1da177e4 LT |
374 | |
375 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
376 | ||
377 | dma_unmap_single(&adapter->vdev->dev, | |
378 | adapter->rx_buff_pool[pool].dma_addr[index], | |
379 | adapter->rx_buff_pool[pool].buff_size, | |
380 | DMA_FROM_DEVICE); | |
381 | ||
047a66d4 | 382 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
383 | adapter->rx_buff_pool[pool].producer_index++; |
384 | if (adapter->rx_buff_pool[pool].producer_index >= | |
385 | adapter->rx_buff_pool[pool].size) | |
386 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
387 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
388 | ||
389 | mb(); | |
390 | ||
391 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
392 | } | |
393 | ||
394 | /* get the current buffer on the rx queue */ | |
395 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
396 | { | |
397 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
398 | unsigned int pool = correlator >> 32; | |
399 | unsigned int index = correlator & 0xffffffffUL; | |
400 | ||
6485911a SL |
401 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
402 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
403 | |
404 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
405 | } | |
406 | ||
407 | /* recycle the current buffer on the rx queue */ | |
c6f59d13 | 408 | static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
409 | { |
410 | u32 q_index = adapter->rx_queue.index; | |
411 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
412 | unsigned int pool = correlator >> 32; | |
413 | unsigned int index = correlator & 0xffffffffUL; | |
414 | union ibmveth_buf_desc desc; | |
415 | unsigned long lpar_rc; | |
c6f59d13 | 416 | int ret = 1; |
1da177e4 | 417 | |
6485911a SL |
418 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
419 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 | 420 | |
f148f61d | 421 | if (!adapter->rx_buff_pool[pool].active) { |
b6d35182 SL |
422 | ibmveth_rxq_harvest_buffer(adapter); |
423 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
c6f59d13 | 424 | goto out; |
b6d35182 SL |
425 | } |
426 | ||
79ef4a4d BK |
427 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
428 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
429 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
430 | ||
431 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 432 | |
f148f61d | 433 | if (lpar_rc != H_SUCCESS) { |
c43ced18 SL |
434 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
435 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 | 436 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
c6f59d13 | 437 | ret = 0; |
1da177e4 LT |
438 | } |
439 | ||
f148f61d | 440 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
441 | adapter->rx_queue.index = 0; |
442 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
443 | } | |
c6f59d13 AB |
444 | |
445 | out: | |
446 | return ret; | |
1da177e4 LT |
447 | } |
448 | ||
493a684a | 449 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
450 | { |
451 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
452 | ||
f148f61d | 453 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
454 | adapter->rx_queue.index = 0; |
455 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
456 | } | |
457 | } | |
458 | ||
459 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
460 | { | |
b6d35182 | 461 | int i; |
8d8bb39b | 462 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 463 | |
f148f61d | 464 | if (adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
465 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
466 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
467 | DMA_BIDIRECTIONAL); |
468 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
469 | } | |
470 | free_page((unsigned long)adapter->buffer_list_addr); | |
471 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 472 | } |
1da177e4 | 473 | |
f148f61d | 474 | if (adapter->filter_list_addr != NULL) { |
8d8bb39b FT |
475 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
476 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
477 | DMA_BIDIRECTIONAL); |
478 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
479 | } | |
480 | free_page((unsigned long)adapter->filter_list_addr); | |
481 | adapter->filter_list_addr = NULL; | |
482 | } | |
483 | ||
f148f61d | 484 | if (adapter->rx_queue.queue_addr != NULL) { |
d90c92fe SL |
485 | dma_free_coherent(dev, adapter->rx_queue.queue_len, |
486 | adapter->rx_queue.queue_addr, | |
487 | adapter->rx_queue.queue_dma); | |
1da177e4 LT |
488 | adapter->rx_queue.queue_addr = NULL; |
489 | } | |
490 | ||
f148f61d | 491 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
860f242e | 492 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 493 | ibmveth_free_buffer_pool(adapter, |
860f242e | 494 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
495 | |
496 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 497 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
498 | dma_unmap_single(&adapter->vdev->dev, |
499 | adapter->bounce_buffer_dma, | |
500 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
501 | DMA_BIDIRECTIONAL); | |
502 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
503 | } | |
504 | kfree(adapter->bounce_buffer); | |
505 | adapter->bounce_buffer = NULL; | |
506 | } | |
1da177e4 LT |
507 | } |
508 | ||
bbedefcc ME |
509 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
510 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
511 | { | |
512 | int rc, try_again = 1; | |
513 | ||
f148f61d SL |
514 | /* |
515 | * After a kexec the adapter will still be open, so our attempt to | |
516 | * open it will fail. So if we get a failure we free the adapter and | |
517 | * try again, but only once. | |
518 | */ | |
bbedefcc ME |
519 | retry: |
520 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
521 | adapter->buffer_list_dma, rxq_desc.desc, | |
522 | adapter->filter_list_dma, mac_address); | |
523 | ||
524 | if (rc != H_SUCCESS && try_again) { | |
525 | do { | |
526 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
527 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
528 | ||
529 | try_again = 0; | |
530 | goto retry; | |
531 | } | |
532 | ||
533 | return rc; | |
534 | } | |
535 | ||
d746ca95 AB |
536 | static u64 ibmveth_encode_mac_addr(u8 *mac) |
537 | { | |
538 | int i; | |
539 | u64 encoded = 0; | |
540 | ||
541 | for (i = 0; i < ETH_ALEN; i++) | |
542 | encoded = (encoded << 8) | mac[i]; | |
543 | ||
544 | return encoded; | |
545 | } | |
546 | ||
1da177e4 LT |
547 | static int ibmveth_open(struct net_device *netdev) |
548 | { | |
4cf1653a | 549 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
d746ca95 | 550 | u64 mac_address; |
b6d35182 | 551 | int rxq_entries = 1; |
1da177e4 LT |
552 | unsigned long lpar_rc; |
553 | int rc; | |
554 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 555 | int i; |
8d8bb39b | 556 | struct device *dev; |
1da177e4 | 557 | |
c43ced18 | 558 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 559 | |
bea3348e SH |
560 | napi_enable(&adapter->napi); |
561 | ||
517e80e6 | 562 | for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
b6d35182 | 563 | rxq_entries += adapter->rx_buff_pool[i].size; |
d7fbeba6 | 564 | |
1da177e4 LT |
565 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
566 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 567 | |
f148f61d | 568 | if (!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
21c2dece SL |
569 | netdev_err(netdev, "unable to allocate filter or buffer list " |
570 | "pages\n"); | |
88426f2a DK |
571 | rc = -ENOMEM; |
572 | goto err_out; | |
1da177e4 LT |
573 | } |
574 | ||
d90c92fe SL |
575 | dev = &adapter->vdev->dev; |
576 | ||
f148f61d SL |
577 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
578 | rxq_entries; | |
d90c92fe | 579 | adapter->rx_queue.queue_addr = |
d0320f75 JP |
580 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
581 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
f148f61d | 582 | if (!adapter->rx_queue.queue_addr) { |
88426f2a DK |
583 | rc = -ENOMEM; |
584 | goto err_out; | |
1da177e4 LT |
585 | } |
586 | ||
8d8bb39b | 587 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 588 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 589 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 590 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
1da177e4 | 591 | |
8d8bb39b | 592 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
d90c92fe | 593 | (dma_mapping_error(dev, adapter->filter_list_dma))) { |
21c2dece SL |
594 | netdev_err(netdev, "unable to map filter or buffer list " |
595 | "pages\n"); | |
88426f2a DK |
596 | rc = -ENOMEM; |
597 | goto err_out; | |
1da177e4 LT |
598 | } |
599 | ||
600 | adapter->rx_queue.index = 0; | |
601 | adapter->rx_queue.num_slots = rxq_entries; | |
602 | adapter->rx_queue.toggle = 1; | |
603 | ||
d746ca95 | 604 | mac_address = ibmveth_encode_mac_addr(netdev->dev_addr); |
1da177e4 | 605 | |
f148f61d SL |
606 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
607 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
608 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
609 | ||
c43ced18 SL |
610 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
611 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
612 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 613 | |
4347ef15 SL |
614 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
615 | ||
bbedefcc | 616 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 617 | |
f148f61d | 618 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
619 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
620 | lpar_rc); | |
621 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
622 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
623 | adapter->buffer_list_dma, |
624 | adapter->filter_list_dma, | |
625 | rxq_desc.desc, | |
626 | mac_address); | |
88426f2a DK |
627 | rc = -ENONET; |
628 | goto err_out; | |
1da177e4 LT |
629 | } |
630 | ||
f148f61d SL |
631 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
632 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
633 | continue; |
634 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 635 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 636 | adapter->rx_buff_pool[i].active = 0; |
88426f2a DK |
637 | rc = -ENOMEM; |
638 | goto err_out; | |
860f242e SL |
639 | } |
640 | } | |
641 | ||
c43ced18 | 642 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
643 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
644 | netdev); | |
645 | if (rc != 0) { | |
21c2dece SL |
646 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
647 | netdev->irq, rc); | |
1da177e4 | 648 | do { |
95de86cf BK |
649 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
650 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 651 | |
88426f2a | 652 | goto err_out; |
1da177e4 LT |
653 | } |
654 | ||
1096d63d RJ |
655 | adapter->bounce_buffer = |
656 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
657 | if (!adapter->bounce_buffer) { | |
88426f2a | 658 | rc = -ENOMEM; |
e0e8ab59 | 659 | goto err_out_free_irq; |
1096d63d RJ |
660 | } |
661 | adapter->bounce_buffer_dma = | |
662 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
663 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 664 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 665 | netdev_err(netdev, "unable to map bounce buffer\n"); |
88426f2a | 666 | rc = -ENOMEM; |
e0e8ab59 | 667 | goto err_out_free_irq; |
1096d63d RJ |
668 | } |
669 | ||
c43ced18 | 670 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 671 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 672 | |
e2adbcb4 | 673 | netif_start_queue(netdev); |
1da177e4 | 674 | |
c43ced18 | 675 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
676 | |
677 | return 0; | |
88426f2a | 678 | |
e0e8ab59 DK |
679 | err_out_free_irq: |
680 | free_irq(netdev->irq, netdev); | |
88426f2a DK |
681 | err_out: |
682 | ibmveth_cleanup(adapter); | |
683 | napi_disable(&adapter->napi); | |
684 | return rc; | |
1da177e4 LT |
685 | } |
686 | ||
687 | static int ibmveth_close(struct net_device *netdev) | |
688 | { | |
4cf1653a | 689 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 690 | long lpar_rc; |
d7fbeba6 | 691 | |
c43ced18 | 692 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 693 | |
bea3348e SH |
694 | napi_disable(&adapter->napi); |
695 | ||
860f242e SL |
696 | if (!adapter->pool_config) |
697 | netif_stop_queue(netdev); | |
1da177e4 | 698 | |
ee2e6114 | 699 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 700 | |
1da177e4 LT |
701 | do { |
702 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 703 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 704 | |
f148f61d | 705 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
706 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
707 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
708 | } |
709 | ||
ee2e6114 RJ |
710 | free_irq(netdev->irq, netdev); |
711 | ||
cbd52281 | 712 | ibmveth_update_rx_no_buffer(adapter); |
1da177e4 LT |
713 | |
714 | ibmveth_cleanup(adapter); | |
715 | ||
c43ced18 | 716 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
717 | |
718 | return 0; | |
719 | } | |
720 | ||
f148f61d SL |
721 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
722 | { | |
723 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | | |
724 | SUPPORTED_FIBRE); | |
725 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | | |
726 | ADVERTISED_FIBRE); | |
70739497 | 727 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
1da177e4 LT |
728 | cmd->duplex = DUPLEX_FULL; |
729 | cmd->port = PORT_FIBRE; | |
730 | cmd->phy_address = 0; | |
731 | cmd->transceiver = XCVR_INTERNAL; | |
732 | cmd->autoneg = AUTONEG_ENABLE; | |
733 | cmd->maxtxpkt = 0; | |
734 | cmd->maxrxpkt = 1; | |
735 | return 0; | |
736 | } | |
737 | ||
f148f61d SL |
738 | static void netdev_get_drvinfo(struct net_device *dev, |
739 | struct ethtool_drvinfo *info) | |
740 | { | |
7826d43f JP |
741 | strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
742 | strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); | |
1da177e4 LT |
743 | } |
744 | ||
c8f44aff MM |
745 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
746 | netdev_features_t features) | |
5fc7e01c | 747 | { |
b9367bf3 MM |
748 | /* |
749 | * Since the ibmveth firmware interface does not have the | |
750 | * concept of separate tx/rx checksum offload enable, if rx | |
751 | * checksum is disabled we also have to disable tx checksum | |
752 | * offload. Once we disable rx checksum offload, we are no | |
753 | * longer allowed to send tx buffers that are not properly | |
754 | * checksummed. | |
755 | */ | |
5fc7e01c | 756 | |
b9367bf3 MM |
757 | if (!(features & NETIF_F_RXCSUM)) |
758 | features &= ~NETIF_F_ALL_CSUM; | |
5fc7e01c | 759 | |
b9367bf3 | 760 | return features; |
5fc7e01c BK |
761 | } |
762 | ||
b9367bf3 | 763 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 764 | { |
4cf1653a | 765 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 766 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 767 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 768 | long ret, ret4, ret6; |
5fc7e01c BK |
769 | int rc1 = 0, rc2 = 0; |
770 | int restart = 0; | |
771 | ||
772 | if (netif_running(dev)) { | |
773 | restart = 1; | |
774 | adapter->pool_config = 1; | |
775 | ibmveth_close(dev); | |
776 | adapter->pool_config = 0; | |
777 | } | |
778 | ||
79ef4a4d BK |
779 | set_attr = 0; |
780 | clr_attr = 0; | |
fb82fd20 AB |
781 | set_attr6 = 0; |
782 | clr_attr6 = 0; | |
5fc7e01c | 783 | |
ab78df75 | 784 | if (data) { |
79ef4a4d | 785 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
786 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
787 | } else { | |
79ef4a4d | 788 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
789 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
790 | } | |
5fc7e01c | 791 | |
79ef4a4d | 792 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 793 | |
79ef4a4d BK |
794 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
795 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
796 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
fb82fd20 | 797 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 798 | set_attr, &ret_attr); |
5fc7e01c | 799 | |
fb82fd20 | 800 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
801 | netdev_err(dev, "unable to change IPv4 checksum " |
802 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
803 | data, ret4); |
804 | ||
805 | h_illan_attributes(adapter->vdev->unit_address, | |
806 | set_attr, clr_attr, &ret_attr); | |
807 | ||
808 | if (data == 1) | |
809 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 810 | |
f148f61d | 811 | } else { |
ab78df75 | 812 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 813 | } |
ab78df75 SL |
814 | |
815 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
816 | clr_attr6, set_attr6, &ret_attr); | |
817 | ||
818 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
819 | netdev_err(dev, "unable to change IPv6 checksum " |
820 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
821 | data, ret6); |
822 | ||
823 | h_illan_attributes(adapter->vdev->unit_address, | |
824 | set_attr6, clr_attr6, &ret_attr); | |
825 | ||
826 | if (data == 1) | |
827 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 828 | |
ab78df75 SL |
829 | } else |
830 | adapter->fw_ipv6_csum_support = data; | |
831 | ||
fb82fd20 | 832 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 833 | adapter->rx_csum = data; |
ab78df75 SL |
834 | else |
835 | rc1 = -EIO; | |
5fc7e01c BK |
836 | } else { |
837 | rc1 = -EIO; | |
21c2dece SL |
838 | netdev_err(dev, "unable to change checksum offload settings." |
839 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
840 | ret_attr); | |
5fc7e01c BK |
841 | } |
842 | ||
843 | if (restart) | |
844 | rc2 = ibmveth_open(dev); | |
845 | ||
846 | return rc1 ? rc1 : rc2; | |
847 | } | |
848 | ||
c8f44aff MM |
849 | static int ibmveth_set_features(struct net_device *dev, |
850 | netdev_features_t features) | |
5fc7e01c | 851 | { |
4cf1653a | 852 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 MM |
853 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
854 | int rc; | |
5fc7e01c | 855 | |
b9367bf3 | 856 | if (rx_csum == adapter->rx_csum) |
5fc7e01c BK |
857 | return 0; |
858 | ||
b9367bf3 MM |
859 | rc = ibmveth_set_csum_offload(dev, rx_csum); |
860 | if (rc && !adapter->rx_csum) | |
861 | dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM); | |
5fc7e01c BK |
862 | |
863 | return rc; | |
864 | } | |
865 | ||
ddbb4de9 BK |
866 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
867 | { | |
868 | int i; | |
869 | ||
870 | if (stringset != ETH_SS_STATS) | |
871 | return; | |
872 | ||
873 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
874 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
875 | } | |
876 | ||
b9f2c044 | 877 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 878 | { |
b9f2c044 JG |
879 | switch (sset) { |
880 | case ETH_SS_STATS: | |
881 | return ARRAY_SIZE(ibmveth_stats); | |
882 | default: | |
883 | return -EOPNOTSUPP; | |
884 | } | |
ddbb4de9 BK |
885 | } |
886 | ||
887 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
888 | struct ethtool_stats *stats, u64 *data) | |
889 | { | |
890 | int i; | |
4cf1653a | 891 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
892 | |
893 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
894 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
895 | } | |
896 | ||
7282d491 | 897 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
898 | .get_drvinfo = netdev_get_drvinfo, |
899 | .get_settings = netdev_get_settings, | |
ed4ba4b5 | 900 | .get_link = ethtool_op_get_link, |
ddbb4de9 | 901 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 902 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 903 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
1da177e4 LT |
904 | }; |
905 | ||
906 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
907 | { | |
908 | return -EOPNOTSUPP; | |
909 | } | |
910 | ||
911 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
912 | ||
6e8ab30e SL |
913 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
914 | union ibmveth_buf_desc *descs) | |
1da177e4 | 915 | { |
1da177e4 LT |
916 | unsigned long correlator; |
917 | unsigned int retry_count; | |
6e8ab30e SL |
918 | unsigned long ret; |
919 | ||
920 | /* | |
921 | * The retry count sets a maximum for the number of broadcast and | |
922 | * multicast destinations within the system. | |
923 | */ | |
924 | retry_count = 1024; | |
925 | correlator = 0; | |
926 | do { | |
927 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
928 | descs[0].desc, descs[1].desc, | |
929 | descs[2].desc, descs[3].desc, | |
930 | descs[4].desc, descs[5].desc, | |
931 | correlator, &correlator); | |
932 | } while ((ret == H_BUSY) && (retry_count--)); | |
933 | ||
934 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
935 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
936 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
937 | return 1; |
938 | } | |
939 | ||
940 | return 0; | |
941 | } | |
60296d9e | 942 | |
6e8ab30e SL |
943 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
944 | struct net_device *netdev) | |
945 | { | |
946 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
947 | unsigned int desc_flags; | |
948 | union ibmveth_buf_desc descs[6]; | |
949 | int last, i; | |
950 | int force_bounce = 0; | |
b93da27f | 951 | dma_addr_t dma_addr; |
6e8ab30e SL |
952 | |
953 | /* | |
954 | * veth handles a maximum of 6 segments including the header, so | |
955 | * we have to linearize the skb if there are more than this. | |
956 | */ | |
957 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
958 | netdev->stats.tx_dropped++; | |
959 | goto out; | |
960 | } | |
1da177e4 | 961 | |
6e8ab30e | 962 | /* veth can't checksum offload UDP */ |
f4ff2872 | 963 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
964 | ((skb->protocol == htons(ETH_P_IP) && |
965 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
966 | (skb->protocol == htons(ETH_P_IPV6) && | |
967 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
968 | skb_checksum_help(skb)) { | |
969 | ||
21c2dece | 970 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 971 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
972 | goto out; |
973 | } | |
974 | ||
6e8ab30e SL |
975 | desc_flags = IBMVETH_BUF_VALID; |
976 | ||
f4ff2872 | 977 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
978 | unsigned char *buf = skb_transport_header(skb) + |
979 | skb->csum_offset; | |
f4ff2872 | 980 | |
6e8ab30e | 981 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
982 | |
983 | /* Need to zero out the checksum */ | |
984 | buf[0] = 0; | |
985 | buf[1] = 0; | |
986 | } | |
987 | ||
6e8ab30e SL |
988 | retry_bounce: |
989 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 990 | |
6e8ab30e SL |
991 | /* |
992 | * If a linear packet is below the rx threshold then | |
993 | * copy it into the static bounce buffer. This avoids the | |
994 | * cost of a TCE insert and remove. | |
995 | */ | |
996 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
997 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
998 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
999 | skb->len); | |
1da177e4 | 1000 | |
6e8ab30e SL |
1001 | descs[0].fields.flags_len = desc_flags | skb->len; |
1002 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
1003 | ||
1004 | if (ibmveth_send(adapter, descs)) { | |
1005 | adapter->tx_send_failed++; | |
1006 | netdev->stats.tx_dropped++; | |
1007 | } else { | |
1008 | netdev->stats.tx_packets++; | |
1009 | netdev->stats.tx_bytes += skb->len; | |
1010 | } | |
1011 | ||
1012 | goto out; | |
1013 | } | |
1014 | ||
1015 | /* Map the header */ | |
b93da27f AB |
1016 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
1017 | skb_headlen(skb), DMA_TO_DEVICE); | |
1018 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
6e8ab30e SL |
1019 | goto map_failed; |
1020 | ||
1021 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
b93da27f | 1022 | descs[0].fields.address = dma_addr; |
6e8ab30e SL |
1023 | |
1024 | /* Map the frags */ | |
1025 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 1026 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
6e8ab30e | 1027 | |
8838a538 | 1028 | dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
9e903e08 | 1029 | skb_frag_size(frag), DMA_TO_DEVICE); |
6e8ab30e SL |
1030 | |
1031 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1032 | goto map_failed_frags; | |
1033 | ||
9e903e08 | 1034 | descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
6e8ab30e SL |
1035 | descs[i+1].fields.address = dma_addr; |
1036 | } | |
1037 | ||
1038 | if (ibmveth_send(adapter, descs)) { | |
1039 | adapter->tx_send_failed++; | |
1040 | netdev->stats.tx_dropped++; | |
1da177e4 | 1041 | } else { |
6e8ab30e SL |
1042 | netdev->stats.tx_packets++; |
1043 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1044 | } |
1045 | ||
33a48ab1 BK |
1046 | dma_unmap_single(&adapter->vdev->dev, |
1047 | descs[0].fields.address, | |
1048 | descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1049 | DMA_TO_DEVICE); | |
1050 | ||
1051 | for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) | |
6e8ab30e SL |
1052 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, |
1053 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1054 | DMA_TO_DEVICE); | |
1da177e4 | 1055 | |
e8cb7eb4 | 1056 | out: |
26faa9d7 | 1057 | dev_consume_skb_any(skb); |
6ed10654 | 1058 | return NETDEV_TX_OK; |
6e8ab30e SL |
1059 | |
1060 | map_failed_frags: | |
1061 | last = i+1; | |
1062 | for (i = 0; i < last; i++) | |
1063 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1064 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1065 | DMA_TO_DEVICE); | |
1066 | ||
1067 | map_failed: | |
1068 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1069 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e SL |
1070 | adapter->tx_map_failed++; |
1071 | skb_linearize(skb); | |
1072 | force_bounce = 1; | |
1073 | goto retry_bounce; | |
1da177e4 LT |
1074 | } |
1075 | ||
bea3348e | 1076 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1077 | { |
f148f61d SL |
1078 | struct ibmveth_adapter *adapter = |
1079 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1080 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1081 | int frames_processed = 0; |
1da177e4 LT |
1082 | unsigned long lpar_rc; |
1083 | ||
f148f61d | 1084 | restart_poll: |
cb013ea1 | 1085 | while (frames_processed < budget) { |
bea3348e SH |
1086 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1087 | break; | |
1da177e4 | 1088 | |
f89e49e7 | 1089 | smp_rmb(); |
bea3348e SH |
1090 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1091 | wmb(); /* suggested by larson1 */ | |
1092 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1093 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1094 | ibmveth_rxq_recycle_buffer(adapter); |
1095 | } else { | |
8d86c61a | 1096 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1097 | int length = ibmveth_rxq_frame_length(adapter); |
1098 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1099 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1100 | ||
bea3348e | 1101 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1102 | |
8d86c61a SL |
1103 | new_skb = NULL; |
1104 | if (length < rx_copybreak) | |
1105 | new_skb = netdev_alloc_skb(netdev, length); | |
1106 | ||
1107 | if (new_skb) { | |
1108 | skb_copy_to_linear_data(new_skb, | |
1109 | skb->data + offset, | |
1110 | length); | |
0c26b677 SL |
1111 | if (rx_flush) |
1112 | ibmveth_flush_buffer(skb->data, | |
1113 | length + offset); | |
c6f59d13 AB |
1114 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1115 | kfree_skb(skb); | |
8d86c61a | 1116 | skb = new_skb; |
8d86c61a SL |
1117 | } else { |
1118 | ibmveth_rxq_harvest_buffer(adapter); | |
1119 | skb_reserve(skb, offset); | |
1120 | } | |
1da177e4 | 1121 | |
bea3348e SH |
1122 | skb_put(skb, length); |
1123 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1124 | |
8d86c61a SL |
1125 | if (csum_good) |
1126 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1127 | ||
bea3348e | 1128 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1129 | |
09f75cd7 JG |
1130 | netdev->stats.rx_packets++; |
1131 | netdev->stats.rx_bytes += length; | |
bea3348e | 1132 | frames_processed++; |
1da177e4 | 1133 | } |
cb013ea1 | 1134 | } |
1da177e4 | 1135 | |
e2adbcb4 | 1136 | ibmveth_replenish_task(adapter); |
1da177e4 | 1137 | |
bea3348e | 1138 | if (frames_processed < budget) { |
4736edc7 YP |
1139 | napi_complete(napi); |
1140 | ||
bea3348e SH |
1141 | /* We think we are done - reenable interrupts, |
1142 | * then check once more to make sure we are done. | |
1143 | */ | |
1144 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1145 | VIO_IRQ_ENABLE); | |
1da177e4 | 1146 | |
6485911a | 1147 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1148 | |
bea3348e | 1149 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1150 | napi_reschedule(napi)) { |
bea3348e SH |
1151 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1152 | VIO_IRQ_DISABLE); | |
1153 | goto restart_poll; | |
1154 | } | |
1da177e4 LT |
1155 | } |
1156 | ||
bea3348e | 1157 | return frames_processed; |
1da177e4 LT |
1158 | } |
1159 | ||
7d12e780 | 1160 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1161 | { |
1da177e4 | 1162 | struct net_device *netdev = dev_instance; |
4cf1653a | 1163 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1164 | unsigned long lpar_rc; |
1165 | ||
288379f0 | 1166 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1167 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1168 | VIO_IRQ_DISABLE); | |
6485911a | 1169 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1170 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1171 | } |
1172 | return IRQ_HANDLED; | |
1173 | } | |
1174 | ||
1da177e4 LT |
1175 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1176 | { | |
4cf1653a | 1177 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1178 | unsigned long lpar_rc; |
1179 | ||
4cd24eaf JP |
1180 | if ((netdev->flags & IFF_PROMISC) || |
1181 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1182 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1183 | IbmVethMcastEnableRecv | | |
1184 | IbmVethMcastDisableFiltering, | |
1185 | 0); | |
f148f61d | 1186 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1187 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1188 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1189 | } |
1190 | } else { | |
22bedad3 | 1191 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1192 | /* clear the filter table & disable filtering */ |
1193 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1194 | IbmVethMcastEnableRecv | | |
1195 | IbmVethMcastDisableFiltering | | |
1196 | IbmVethMcastClearFilterTable, | |
1197 | 0); | |
f148f61d | 1198 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1199 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1200 | "attempting to clear filter table\n", | |
1201 | lpar_rc); | |
1da177e4 LT |
1202 | } |
1203 | /* add the addresses to the filter table */ | |
22bedad3 | 1204 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1205 | /* add the multicast address to the filter table */ |
d746ca95 AB |
1206 | u64 mcast_addr; |
1207 | mcast_addr = ibmveth_encode_mac_addr(ha->addr); | |
1da177e4 LT |
1208 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1209 | IbmVethMcastAddFilter, | |
1210 | mcast_addr); | |
f148f61d | 1211 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1212 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1213 | "when adding an entry to the filter " | |
1214 | "table\n", lpar_rc); | |
1da177e4 LT |
1215 | } |
1216 | } | |
d7fbeba6 | 1217 | |
1da177e4 LT |
1218 | /* re-enable filtering */ |
1219 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1220 | IbmVethMcastEnableFiltering, | |
1221 | 0); | |
f148f61d | 1222 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1223 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1224 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1225 | } |
1226 | } | |
1227 | } | |
1228 | ||
1229 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1230 | { | |
4cf1653a | 1231 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1232 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1233 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1234 | int i, rc; |
1235 | int need_restart = 0; | |
b6d35182 | 1236 | |
517e80e6 | 1237 | if (new_mtu < IBMVETH_MIN_MTU) |
1da177e4 | 1238 | return -EINVAL; |
b6d35182 | 1239 | |
517e80e6 | 1240 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
ce6eea58 BK |
1241 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) |
1242 | break; | |
1243 | ||
517e80e6 | 1244 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1245 | return -EINVAL; |
1246 | ||
ea866e65 SL |
1247 | /* Deactivate all the buffer pools so that the next loop can activate |
1248 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1249 | if (netif_running(adapter->netdev)) { |
1250 | need_restart = 1; | |
1251 | adapter->pool_config = 1; | |
1252 | ibmveth_close(adapter->netdev); | |
1253 | adapter->pool_config = 0; | |
1254 | } | |
ea866e65 | 1255 | |
860f242e | 1256 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1257 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1258 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1259 | |
860f242e | 1260 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1261 | dev->mtu = new_mtu; |
1262 | vio_cmo_set_dev_desired(viodev, | |
1263 | ibmveth_get_desired_dma | |
1264 | (viodev)); | |
0645bab7 RJ |
1265 | if (need_restart) { |
1266 | return ibmveth_open(adapter->netdev); | |
1267 | } | |
860f242e | 1268 | return 0; |
b6d35182 | 1269 | } |
b6d35182 | 1270 | } |
0645bab7 RJ |
1271 | |
1272 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1273 | return rc; | |
1274 | ||
860f242e | 1275 | return -EINVAL; |
1da177e4 LT |
1276 | } |
1277 | ||
6b422374 SL |
1278 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1279 | static void ibmveth_poll_controller(struct net_device *dev) | |
1280 | { | |
4cf1653a | 1281 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1282 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1283 | } |
1284 | #endif | |
1285 | ||
1096d63d RJ |
1286 | /** |
1287 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1288 | * | |
1289 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1290 | * | |
1291 | * Return value: | |
1292 | * Number of bytes of IO data the driver will need to perform well. | |
1293 | */ | |
1294 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1295 | { | |
1296 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1297 | struct ibmveth_adapter *adapter; | |
d0847757 | 1298 | struct iommu_table *tbl; |
1096d63d RJ |
1299 | unsigned long ret; |
1300 | int i; | |
1301 | int rxqentries = 1; | |
1302 | ||
d0847757 AP |
1303 | tbl = get_iommu_table_base(&vdev->dev); |
1304 | ||
1096d63d RJ |
1305 | /* netdev inits at probe time along with the structures we need below*/ |
1306 | if (netdev == NULL) | |
d0847757 | 1307 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); |
1096d63d RJ |
1308 | |
1309 | adapter = netdev_priv(netdev); | |
1310 | ||
1311 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
d0847757 | 1312 | ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); |
1096d63d | 1313 | |
517e80e6 | 1314 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1315 | /* add the size of the active receive buffers */ |
1316 | if (adapter->rx_buff_pool[i].active) | |
1317 | ret += | |
1318 | adapter->rx_buff_pool[i].size * | |
1319 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
d0847757 | 1320 | buff_size, tbl); |
1096d63d RJ |
1321 | rxqentries += adapter->rx_buff_pool[i].size; |
1322 | } | |
1323 | /* add the size of the receive queue entries */ | |
d0847757 AP |
1324 | ret += IOMMU_PAGE_ALIGN( |
1325 | rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); | |
1096d63d RJ |
1326 | |
1327 | return ret; | |
1328 | } | |
1329 | ||
c77c761f TF |
1330 | static int ibmveth_set_mac_addr(struct net_device *dev, void *p) |
1331 | { | |
1332 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
1333 | struct sockaddr *addr = p; | |
1334 | u64 mac_address; | |
1335 | int rc; | |
1336 | ||
1337 | if (!is_valid_ether_addr(addr->sa_data)) | |
1338 | return -EADDRNOTAVAIL; | |
1339 | ||
1340 | mac_address = ibmveth_encode_mac_addr(addr->sa_data); | |
1341 | rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address); | |
1342 | if (rc) { | |
1343 | netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc); | |
1344 | return rc; | |
1345 | } | |
1346 | ||
1347 | ether_addr_copy(dev->dev_addr, addr->sa_data); | |
1348 | ||
1349 | return 0; | |
1350 | } | |
1351 | ||
e186d174 AB |
1352 | static const struct net_device_ops ibmveth_netdev_ops = { |
1353 | .ndo_open = ibmveth_open, | |
1354 | .ndo_stop = ibmveth_close, | |
1355 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1356 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
e186d174 AB |
1357 | .ndo_do_ioctl = ibmveth_ioctl, |
1358 | .ndo_change_mtu = ibmveth_change_mtu, | |
b9367bf3 MM |
1359 | .ndo_fix_features = ibmveth_fix_features, |
1360 | .ndo_set_features = ibmveth_set_features, | |
e186d174 | 1361 | .ndo_validate_addr = eth_validate_addr, |
c77c761f | 1362 | .ndo_set_mac_address = ibmveth_set_mac_addr, |
e186d174 AB |
1363 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1364 | .ndo_poll_controller = ibmveth_poll_controller, | |
1365 | #endif | |
1366 | }; | |
1367 | ||
1dd06ae8 | 1368 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1369 | { |
13f85203 | 1370 | int rc, i, mac_len; |
1da177e4 | 1371 | struct net_device *netdev; |
9dc83afd | 1372 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1373 | unsigned char *mac_addr_p; |
1374 | unsigned int *mcastFilterSize_p; | |
1375 | ||
c43ced18 SL |
1376 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1377 | dev->unit_address); | |
1da177e4 | 1378 | |
f148f61d | 1379 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
13f85203 | 1380 | &mac_len); |
f148f61d | 1381 | if (!mac_addr_p) { |
21c2dece | 1382 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1383 | return -EINVAL; |
1da177e4 | 1384 | } |
13f85203 BH |
1385 | /* Workaround for old/broken pHyp */ |
1386 | if (mac_len == 8) | |
1387 | mac_addr_p += 2; | |
1388 | else if (mac_len != 6) { | |
1389 | dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", | |
1390 | mac_len); | |
1391 | return -EINVAL; | |
1392 | } | |
d7fbeba6 | 1393 | |
f148f61d | 1394 | mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, |
493a684a | 1395 | VETH_MCAST_FILTER_SIZE, NULL); |
f148f61d | 1396 | if (!mcastFilterSize_p) { |
21c2dece SL |
1397 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1398 | "attribute\n"); | |
be35ae9e | 1399 | return -EINVAL; |
1da177e4 | 1400 | } |
d7fbeba6 | 1401 | |
1da177e4 LT |
1402 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1403 | ||
f148f61d | 1404 | if (!netdev) |
1da177e4 LT |
1405 | return -ENOMEM; |
1406 | ||
4cf1653a | 1407 | adapter = netdev_priv(netdev); |
c7ae011d | 1408 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1409 | |
1410 | adapter->vdev = dev; | |
1411 | adapter->netdev = netdev; | |
f148f61d | 1412 | adapter->mcastFilterSize = *mcastFilterSize_p; |
860f242e | 1413 | adapter->pool_config = 0; |
d7fbeba6 | 1414 | |
bea3348e SH |
1415 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1416 | ||
1da177e4 | 1417 | netdev->irq = dev->irq; |
e186d174 AB |
1418 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1419 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1420 | SET_NETDEV_DEV(netdev, &dev->dev); |
b9367bf3 MM |
1421 | netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | |
1422 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
1423 | netdev->features |= netdev->hw_features; | |
1da177e4 | 1424 | |
d746ca95 | 1425 | memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN); |
1da177e4 | 1426 | |
f148f61d | 1427 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1428 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1429 | int error; |
1430 | ||
d7fbeba6 JG |
1431 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1432 | pool_count[i], pool_size[i], | |
860f242e | 1433 | pool_active[i]); |
8dde2a96 GKH |
1434 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1435 | &dev->dev.kobj, "pool%d", i); | |
1436 | if (!error) | |
1437 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1438 | } |
1da177e4 | 1439 | |
c43ced18 | 1440 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1441 | |
1da177e4 LT |
1442 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1443 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1444 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1445 | ||
c43ced18 | 1446 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1447 | |
b801a4e7 MM |
1448 | ibmveth_set_features(netdev, netdev->features); |
1449 | ||
1da177e4 LT |
1450 | rc = register_netdev(netdev); |
1451 | ||
f148f61d | 1452 | if (rc) { |
c43ced18 | 1453 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1454 | free_netdev(netdev); |
1455 | return rc; | |
1456 | } | |
1457 | ||
c43ced18 | 1458 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1459 | |
1da177e4 LT |
1460 | return 0; |
1461 | } | |
1462 | ||
e11787a2 | 1463 | static int ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1464 | { |
c7ae011d | 1465 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1466 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1467 | int i; |
1468 | ||
f148f61d | 1469 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1470 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1471 | |
1472 | unregister_netdev(netdev); | |
1473 | ||
1da177e4 | 1474 | free_netdev(netdev); |
1096d63d RJ |
1475 | dev_set_drvdata(&dev->dev, NULL); |
1476 | ||
1da177e4 LT |
1477 | return 0; |
1478 | } | |
1479 | ||
860f242e SL |
1480 | static struct attribute veth_active_attr; |
1481 | static struct attribute veth_num_attr; | |
1482 | static struct attribute veth_size_attr; | |
1483 | ||
f148f61d SL |
1484 | static ssize_t veth_pool_show(struct kobject *kobj, |
1485 | struct attribute *attr, char *buf) | |
860f242e | 1486 | { |
d7fbeba6 | 1487 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1488 | struct ibmveth_buff_pool, |
1489 | kobj); | |
1490 | ||
1491 | if (attr == &veth_active_attr) | |
1492 | return sprintf(buf, "%d\n", pool->active); | |
1493 | else if (attr == &veth_num_attr) | |
1494 | return sprintf(buf, "%d\n", pool->size); | |
1495 | else if (attr == &veth_size_attr) | |
1496 | return sprintf(buf, "%d\n", pool->buff_size); | |
1497 | return 0; | |
1498 | } | |
1499 | ||
f148f61d SL |
1500 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1501 | const char *buf, size_t count) | |
860f242e | 1502 | { |
d7fbeba6 | 1503 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1504 | struct ibmveth_buff_pool, |
1505 | kobj); | |
c7ae011d GKH |
1506 | struct net_device *netdev = dev_get_drvdata( |
1507 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1508 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1509 | long value = simple_strtol(buf, NULL, 10); |
1510 | long rc; | |
1511 | ||
1512 | if (attr == &veth_active_attr) { | |
1513 | if (value && !pool->active) { | |
4aa9c93e | 1514 | if (netif_running(netdev)) { |
f148f61d | 1515 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1516 | netdev_err(netdev, |
1517 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1518 | return -ENOMEM; |
1519 | } | |
1520 | pool->active = 1; | |
1521 | adapter->pool_config = 1; | |
1522 | ibmveth_close(netdev); | |
1523 | adapter->pool_config = 0; | |
1524 | if ((rc = ibmveth_open(netdev))) | |
1525 | return rc; | |
f148f61d | 1526 | } else { |
4aa9c93e | 1527 | pool->active = 1; |
f148f61d | 1528 | } |
860f242e SL |
1529 | } else if (!value && pool->active) { |
1530 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1531 | int i; | |
1532 | /* Make sure there is a buffer pool with buffers that | |
1533 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1534 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1535 | if (pool == &adapter->rx_buff_pool[i]) |
1536 | continue; | |
1537 | if (!adapter->rx_buff_pool[i].active) | |
1538 | continue; | |
76b9cfcc BK |
1539 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1540 | break; | |
860f242e | 1541 | } |
76b9cfcc | 1542 | |
517e80e6 | 1543 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1544 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1545 | return -EPERM; |
1546 | } | |
76b9cfcc | 1547 | |
76b9cfcc BK |
1548 | if (netif_running(netdev)) { |
1549 | adapter->pool_config = 1; | |
1550 | ibmveth_close(netdev); | |
ea866e65 | 1551 | pool->active = 0; |
76b9cfcc BK |
1552 | adapter->pool_config = 0; |
1553 | if ((rc = ibmveth_open(netdev))) | |
1554 | return rc; | |
1555 | } | |
ea866e65 | 1556 | pool->active = 0; |
860f242e SL |
1557 | } |
1558 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1559 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1560 | return -EINVAL; |
f148f61d | 1561 | } else { |
4aa9c93e BK |
1562 | if (netif_running(netdev)) { |
1563 | adapter->pool_config = 1; | |
1564 | ibmveth_close(netdev); | |
1565 | adapter->pool_config = 0; | |
1566 | pool->size = value; | |
1567 | if ((rc = ibmveth_open(netdev))) | |
1568 | return rc; | |
f148f61d | 1569 | } else { |
4aa9c93e | 1570 | pool->size = value; |
f148f61d | 1571 | } |
860f242e SL |
1572 | } |
1573 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1574 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1575 | return -EINVAL; |
f148f61d | 1576 | } else { |
4aa9c93e BK |
1577 | if (netif_running(netdev)) { |
1578 | adapter->pool_config = 1; | |
1579 | ibmveth_close(netdev); | |
1580 | adapter->pool_config = 0; | |
1581 | pool->buff_size = value; | |
1582 | if ((rc = ibmveth_open(netdev))) | |
1583 | return rc; | |
f148f61d | 1584 | } else { |
4aa9c93e | 1585 | pool->buff_size = value; |
f148f61d | 1586 | } |
860f242e SL |
1587 | } |
1588 | } | |
1589 | ||
1590 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1591 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1592 | return count; |
1593 | } | |
1594 | ||
1595 | ||
f148f61d SL |
1596 | #define ATTR(_name, _mode) \ |
1597 | struct attribute veth_##_name##_attr = { \ | |
1598 | .name = __stringify(_name), .mode = _mode, \ | |
1599 | }; | |
860f242e SL |
1600 | |
1601 | static ATTR(active, 0644); | |
1602 | static ATTR(num, 0644); | |
1603 | static ATTR(size, 0644); | |
1604 | ||
f148f61d | 1605 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1606 | &veth_active_attr, |
1607 | &veth_num_attr, | |
1608 | &veth_size_attr, | |
1609 | NULL, | |
1610 | }; | |
1611 | ||
52cf25d0 | 1612 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1613 | .show = veth_pool_show, |
1614 | .store = veth_pool_store, | |
1615 | }; | |
1616 | ||
1617 | static struct kobj_type ktype_veth_pool = { | |
1618 | .release = NULL, | |
1619 | .sysfs_ops = &veth_pool_ops, | |
1620 | .default_attrs = veth_pool_attrs, | |
1621 | }; | |
1622 | ||
e7a3af5d BK |
1623 | static int ibmveth_resume(struct device *dev) |
1624 | { | |
1625 | struct net_device *netdev = dev_get_drvdata(dev); | |
1626 | ibmveth_interrupt(netdev->irq, netdev); | |
1627 | return 0; | |
1628 | } | |
860f242e | 1629 | |
e11787a2 | 1630 | static struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1631 | { "network", "IBM,l-lan"}, |
fb120da6 | 1632 | { "", "" } |
1da177e4 | 1633 | }; |
1da177e4 LT |
1634 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1635 | ||
e7a3af5d BK |
1636 | static struct dev_pm_ops ibmveth_pm_ops = { |
1637 | .resume = ibmveth_resume | |
1638 | }; | |
1639 | ||
1da177e4 | 1640 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1641 | .id_table = ibmveth_device_table, |
1642 | .probe = ibmveth_probe, | |
1643 | .remove = ibmveth_remove, | |
1096d63d | 1644 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1645 | .name = ibmveth_driver_name, |
1646 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1647 | }; |
1648 | ||
1649 | static int __init ibmveth_module_init(void) | |
1650 | { | |
21c2dece SL |
1651 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1652 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1653 | |
1da177e4 LT |
1654 | return vio_register_driver(&ibmveth_driver); |
1655 | } | |
1656 | ||
1657 | static void __exit ibmveth_module_exit(void) | |
1658 | { | |
1659 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1660 | } |
1da177e4 LT |
1661 | |
1662 | module_init(ibmveth_module_init); | |
1663 | module_exit(ibmveth_module_exit); |