Commit | Line | Data |
---|---|---|
f148f61d | 1 | /* |
9d348af4 | 2 | * IBM Power Virtual Ethernet Device Driver |
f148f61d | 3 | * |
9d348af4 SL |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
f148f61d | 8 | * |
9d348af4 SL |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
f148f61d | 13 | * |
9d348af4 | 14 | * You should have received a copy of the GNU General Public License |
0ab75ae8 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
f148f61d | 16 | * |
9d348af4 SL |
17 | * Copyright (C) IBM Corporation, 2003, 2010 |
18 | * | |
19 | * Authors: Dave Larson <larson1@us.ibm.com> | |
20 | * Santiago Leon <santil@linux.vnet.ibm.com> | |
21 | * Brian King <brking@linux.vnet.ibm.com> | |
22 | * Robert Jennings <rcj@linux.vnet.ibm.com> | |
23 | * Anton Blanchard <anton@au.ibm.com> | |
f148f61d | 24 | */ |
1da177e4 | 25 | |
1da177e4 | 26 | #include <linux/module.h> |
1096d63d | 27 | #include <linux/moduleparam.h> |
1da177e4 LT |
28 | #include <linux/types.h> |
29 | #include <linux/errno.h> | |
1da177e4 LT |
30 | #include <linux/dma-mapping.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/init.h> | |
a6b7a407 | 36 | #include <linux/interrupt.h> |
1da177e4 | 37 | #include <linux/mm.h> |
e7a3af5d | 38 | #include <linux/pm.h> |
1da177e4 | 39 | #include <linux/ethtool.h> |
f4ff2872 BK |
40 | #include <linux/in.h> |
41 | #include <linux/ip.h> | |
ab78df75 | 42 | #include <linux/ipv6.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
1da177e4 | 44 | #include <asm/hvcall.h> |
60063497 | 45 | #include <linux/atomic.h> |
1da177e4 | 46 | #include <asm/vio.h> |
1096d63d | 47 | #include <asm/iommu.h> |
1096d63d | 48 | #include <asm/firmware.h> |
1da177e4 LT |
49 | |
50 | #include "ibmveth.h" | |
51 | ||
7d12e780 | 52 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 53 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 54 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
e295fe83 | 55 | |
860f242e | 56 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 57 | |
1096d63d | 58 | |
1da177e4 | 59 | static const char ibmveth_driver_name[] = "ibmveth"; |
9d348af4 SL |
60 | static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; |
61 | #define ibmveth_driver_version "1.04" | |
1da177e4 | 62 | |
9d348af4 SL |
63 | MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>"); |
64 | MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); | |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | MODULE_VERSION(ibmveth_driver_version); | |
67 | ||
c08cc3cc SL |
68 | static unsigned int tx_copybreak __read_mostly = 128; |
69 | module_param(tx_copybreak, uint, 0644); | |
70 | MODULE_PARM_DESC(tx_copybreak, | |
71 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
72 | ||
8d86c61a SL |
73 | static unsigned int rx_copybreak __read_mostly = 128; |
74 | module_param(rx_copybreak, uint, 0644); | |
75 | MODULE_PARM_DESC(rx_copybreak, | |
76 | "Maximum size of packet that is copied to a new buffer on receive"); | |
77 | ||
0c26b677 SL |
78 | static unsigned int rx_flush __read_mostly = 0; |
79 | module_param(rx_flush, uint, 0644); | |
80 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
81 | ||
ddbb4de9 BK |
82 | struct ibmveth_stat { |
83 | char name[ETH_GSTRING_LEN]; | |
84 | int offset; | |
85 | }; | |
86 | ||
87 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
88 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
89 | ||
90 | struct ibmveth_stat ibmveth_stats[] = { | |
91 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
92 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
f148f61d SL |
93 | { "replenish_add_buff_failure", |
94 | IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
95 | { "replenish_add_buff_success", | |
96 | IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
ddbb4de9 BK |
97 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, |
98 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
99 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
100 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
101 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
102 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
ddbb4de9 BK |
103 | }; |
104 | ||
1da177e4 | 105 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
106 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
107 | { | |
0b536be7 | 108 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); |
79ef4a4d BK |
109 | } |
110 | ||
111 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
112 | { | |
f148f61d SL |
113 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> |
114 | IBMVETH_RXQ_TOGGLE_SHIFT; | |
79ef4a4d BK |
115 | } |
116 | ||
1da177e4 LT |
117 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
118 | { | |
f148f61d | 119 | return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; |
1da177e4 LT |
120 | } |
121 | ||
122 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
123 | { | |
f148f61d | 124 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; |
1da177e4 LT |
125 | } |
126 | ||
127 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
128 | { | |
f148f61d | 129 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; |
1da177e4 LT |
130 | } |
131 | ||
132 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
133 | { | |
0b536be7 | 134 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); |
1da177e4 LT |
135 | } |
136 | ||
f4ff2872 BK |
137 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
138 | { | |
f148f61d | 139 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; |
f4ff2872 BK |
140 | } |
141 | ||
1da177e4 | 142 | /* setup the initial settings for a buffer pool */ |
f148f61d SL |
143 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, |
144 | u32 pool_index, u32 pool_size, | |
145 | u32 buff_size, u32 pool_active) | |
1da177e4 LT |
146 | { |
147 | pool->size = pool_size; | |
148 | pool->index = pool_index; | |
149 | pool->buff_size = buff_size; | |
c033a6d1 | 150 | pool->threshold = pool_size * 7 / 8; |
860f242e | 151 | pool->active = pool_active; |
1da177e4 LT |
152 | } |
153 | ||
154 | /* allocate and setup an buffer pool - called during open */ | |
155 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
156 | { | |
157 | int i; | |
158 | ||
d7fbeba6 | 159 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 | 160 | |
f148f61d | 161 | if (!pool->free_map) |
1da177e4 | 162 | return -1; |
1da177e4 | 163 | |
d7fbeba6 | 164 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
f148f61d | 165 | if (!pool->dma_addr) { |
1da177e4 LT |
166 | kfree(pool->free_map); |
167 | pool->free_map = NULL; | |
168 | return -1; | |
169 | } | |
170 | ||
a05abcb5 | 171 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 | 172 | |
f148f61d | 173 | if (!pool->skbuff) { |
1da177e4 LT |
174 | kfree(pool->dma_addr); |
175 | pool->dma_addr = NULL; | |
176 | ||
177 | kfree(pool->free_map); | |
178 | pool->free_map = NULL; | |
179 | return -1; | |
180 | } | |
181 | ||
1da177e4 LT |
182 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
183 | ||
f148f61d | 184 | for (i = 0; i < pool->size; ++i) |
1da177e4 | 185 | pool->free_map[i] = i; |
1da177e4 LT |
186 | |
187 | atomic_set(&pool->available, 0); | |
188 | pool->producer_index = 0; | |
189 | pool->consumer_index = 0; | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
0c26b677 SL |
194 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
195 | { | |
196 | unsigned long offset; | |
197 | ||
198 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
199 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
200 | } | |
201 | ||
1da177e4 LT |
202 | /* replenish the buffers for a pool. note that we don't need to |
203 | * skb_reserve these since they are used for incoming... | |
204 | */ | |
f148f61d SL |
205 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, |
206 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
207 | { |
208 | u32 i; | |
209 | u32 count = pool->size - atomic_read(&pool->available); | |
210 | u32 buffers_added = 0; | |
1096d63d RJ |
211 | struct sk_buff *skb; |
212 | unsigned int free_index, index; | |
213 | u64 correlator; | |
214 | unsigned long lpar_rc; | |
215 | dma_addr_t dma_addr; | |
1da177e4 LT |
216 | |
217 | mb(); | |
218 | ||
f148f61d | 219 | for (i = 0; i < count; ++i) { |
1da177e4 | 220 | union ibmveth_buf_desc desc; |
1da177e4 | 221 | |
003212cc | 222 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 | 223 | |
f148f61d | 224 | if (!skb) { |
c43ced18 SL |
225 | netdev_dbg(adapter->netdev, |
226 | "replenish: unable to allocate skb\n"); | |
1da177e4 LT |
227 | adapter->replenish_no_mem++; |
228 | break; | |
229 | } | |
230 | ||
047a66d4 | 231 | free_index = pool->consumer_index; |
a613f581 SL |
232 | pool->consumer_index++; |
233 | if (pool->consumer_index >= pool->size) | |
234 | pool->consumer_index = 0; | |
1da177e4 | 235 | index = pool->free_map[free_index]; |
d7fbeba6 | 236 | |
6485911a SL |
237 | BUG_ON(index == IBM_VETH_INVALID_MAP); |
238 | BUG_ON(pool->skbuff[index] != NULL); | |
1da177e4 LT |
239 | |
240 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
241 | pool->buff_size, DMA_FROM_DEVICE); | |
242 | ||
c713e7cb | 243 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
244 | goto failure; |
245 | ||
1da177e4 LT |
246 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
247 | pool->dma_addr[index] = dma_addr; | |
248 | pool->skbuff[index] = skb; | |
249 | ||
250 | correlator = ((u64)pool->index << 32) | index; | |
f148f61d | 251 | *(u64 *)skb->data = correlator; |
1da177e4 | 252 | |
79ef4a4d | 253 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 254 | desc.fields.address = dma_addr; |
1da177e4 | 255 | |
0c26b677 SL |
256 | if (rx_flush) { |
257 | unsigned int len = min(pool->buff_size, | |
258 | adapter->netdev->mtu + | |
259 | IBMVETH_BUFF_OH); | |
260 | ibmveth_flush_buffer(skb->data, len); | |
261 | } | |
f148f61d SL |
262 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, |
263 | desc.desc); | |
d7fbeba6 | 264 | |
f148f61d | 265 | if (lpar_rc != H_SUCCESS) { |
1096d63d | 266 | goto failure; |
f148f61d | 267 | } else { |
1da177e4 LT |
268 | buffers_added++; |
269 | adapter->replenish_add_buff_success++; | |
270 | } | |
271 | } | |
d7fbeba6 | 272 | |
1096d63d RJ |
273 | mb(); |
274 | atomic_add(buffers_added, &(pool->available)); | |
275 | return; | |
276 | ||
277 | failure: | |
278 | pool->free_map[free_index] = index; | |
279 | pool->skbuff[index] = NULL; | |
280 | if (pool->consumer_index == 0) | |
281 | pool->consumer_index = pool->size - 1; | |
282 | else | |
283 | pool->consumer_index--; | |
c713e7cb | 284 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
285 | dma_unmap_single(&adapter->vdev->dev, |
286 | pool->dma_addr[index], pool->buff_size, | |
287 | DMA_FROM_DEVICE); | |
288 | dev_kfree_skb_any(skb); | |
289 | adapter->replenish_add_buff_failure++; | |
290 | ||
1da177e4 LT |
291 | mb(); |
292 | atomic_add(buffers_added, &(pool->available)); | |
293 | } | |
294 | ||
e2adbcb4 | 295 | /* replenish routine */ |
d7fbeba6 | 296 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 297 | { |
b6d35182 SL |
298 | int i; |
299 | ||
1da177e4 LT |
300 | adapter->replenish_task_cycles++; |
301 | ||
517e80e6 | 302 | for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { |
c033a6d1 SL |
303 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; |
304 | ||
305 | if (pool->active && | |
306 | (atomic_read(&pool->available) < pool->threshold)) | |
307 | ibmveth_replenish_buffer_pool(adapter, pool); | |
308 | } | |
1da177e4 | 309 | |
f148f61d SL |
310 | adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) + |
311 | 4096 - 8); | |
1da177e4 LT |
312 | } |
313 | ||
314 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
f148f61d SL |
315 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, |
316 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
317 | { |
318 | int i; | |
319 | ||
b4558ea9 JJ |
320 | kfree(pool->free_map); |
321 | pool->free_map = NULL; | |
1da177e4 | 322 | |
f148f61d SL |
323 | if (pool->skbuff && pool->dma_addr) { |
324 | for (i = 0; i < pool->size; ++i) { | |
1da177e4 | 325 | struct sk_buff *skb = pool->skbuff[i]; |
f148f61d | 326 | if (skb) { |
1da177e4 LT |
327 | dma_unmap_single(&adapter->vdev->dev, |
328 | pool->dma_addr[i], | |
329 | pool->buff_size, | |
330 | DMA_FROM_DEVICE); | |
331 | dev_kfree_skb_any(skb); | |
332 | pool->skbuff[i] = NULL; | |
333 | } | |
334 | } | |
335 | } | |
336 | ||
f148f61d | 337 | if (pool->dma_addr) { |
1da177e4 LT |
338 | kfree(pool->dma_addr); |
339 | pool->dma_addr = NULL; | |
340 | } | |
341 | ||
f148f61d | 342 | if (pool->skbuff) { |
1da177e4 LT |
343 | kfree(pool->skbuff); |
344 | pool->skbuff = NULL; | |
345 | } | |
346 | } | |
347 | ||
348 | /* remove a buffer from a pool */ | |
f148f61d SL |
349 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, |
350 | u64 correlator) | |
1da177e4 LT |
351 | { |
352 | unsigned int pool = correlator >> 32; | |
353 | unsigned int index = correlator & 0xffffffffUL; | |
354 | unsigned int free_index; | |
355 | struct sk_buff *skb; | |
356 | ||
6485911a SL |
357 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
358 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
359 | |
360 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
361 | ||
6485911a | 362 | BUG_ON(skb == NULL); |
1da177e4 LT |
363 | |
364 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
365 | ||
366 | dma_unmap_single(&adapter->vdev->dev, | |
367 | adapter->rx_buff_pool[pool].dma_addr[index], | |
368 | adapter->rx_buff_pool[pool].buff_size, | |
369 | DMA_FROM_DEVICE); | |
370 | ||
047a66d4 | 371 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
372 | adapter->rx_buff_pool[pool].producer_index++; |
373 | if (adapter->rx_buff_pool[pool].producer_index >= | |
374 | adapter->rx_buff_pool[pool].size) | |
375 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
376 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
377 | ||
378 | mb(); | |
379 | ||
380 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
381 | } | |
382 | ||
383 | /* get the current buffer on the rx queue */ | |
384 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
385 | { | |
386 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
387 | unsigned int pool = correlator >> 32; | |
388 | unsigned int index = correlator & 0xffffffffUL; | |
389 | ||
6485911a SL |
390 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
391 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
392 | |
393 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
394 | } | |
395 | ||
396 | /* recycle the current buffer on the rx queue */ | |
c6f59d13 | 397 | static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
398 | { |
399 | u32 q_index = adapter->rx_queue.index; | |
400 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
401 | unsigned int pool = correlator >> 32; | |
402 | unsigned int index = correlator & 0xffffffffUL; | |
403 | union ibmveth_buf_desc desc; | |
404 | unsigned long lpar_rc; | |
c6f59d13 | 405 | int ret = 1; |
1da177e4 | 406 | |
6485911a SL |
407 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
408 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 | 409 | |
f148f61d | 410 | if (!adapter->rx_buff_pool[pool].active) { |
b6d35182 SL |
411 | ibmveth_rxq_harvest_buffer(adapter); |
412 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
c6f59d13 | 413 | goto out; |
b6d35182 SL |
414 | } |
415 | ||
79ef4a4d BK |
416 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
417 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
418 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
419 | ||
420 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 421 | |
f148f61d | 422 | if (lpar_rc != H_SUCCESS) { |
c43ced18 SL |
423 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
424 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 | 425 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
c6f59d13 | 426 | ret = 0; |
1da177e4 LT |
427 | } |
428 | ||
f148f61d | 429 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
430 | adapter->rx_queue.index = 0; |
431 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
432 | } | |
c6f59d13 AB |
433 | |
434 | out: | |
435 | return ret; | |
1da177e4 LT |
436 | } |
437 | ||
493a684a | 438 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
439 | { |
440 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
441 | ||
f148f61d | 442 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
443 | adapter->rx_queue.index = 0; |
444 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
445 | } | |
446 | } | |
447 | ||
448 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
449 | { | |
b6d35182 | 450 | int i; |
8d8bb39b | 451 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 452 | |
f148f61d | 453 | if (adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
454 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
455 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
456 | DMA_BIDIRECTIONAL); |
457 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
458 | } | |
459 | free_page((unsigned long)adapter->buffer_list_addr); | |
460 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 461 | } |
1da177e4 | 462 | |
f148f61d | 463 | if (adapter->filter_list_addr != NULL) { |
8d8bb39b FT |
464 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
465 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
466 | DMA_BIDIRECTIONAL); |
467 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
468 | } | |
469 | free_page((unsigned long)adapter->filter_list_addr); | |
470 | adapter->filter_list_addr = NULL; | |
471 | } | |
472 | ||
f148f61d | 473 | if (adapter->rx_queue.queue_addr != NULL) { |
d90c92fe SL |
474 | dma_free_coherent(dev, adapter->rx_queue.queue_len, |
475 | adapter->rx_queue.queue_addr, | |
476 | adapter->rx_queue.queue_dma); | |
1da177e4 LT |
477 | adapter->rx_queue.queue_addr = NULL; |
478 | } | |
479 | ||
f148f61d | 480 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
860f242e | 481 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 482 | ibmveth_free_buffer_pool(adapter, |
860f242e | 483 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
484 | |
485 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 486 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
487 | dma_unmap_single(&adapter->vdev->dev, |
488 | adapter->bounce_buffer_dma, | |
489 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
490 | DMA_BIDIRECTIONAL); | |
491 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
492 | } | |
493 | kfree(adapter->bounce_buffer); | |
494 | adapter->bounce_buffer = NULL; | |
495 | } | |
1da177e4 LT |
496 | } |
497 | ||
bbedefcc ME |
498 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
499 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
500 | { | |
501 | int rc, try_again = 1; | |
502 | ||
f148f61d SL |
503 | /* |
504 | * After a kexec the adapter will still be open, so our attempt to | |
505 | * open it will fail. So if we get a failure we free the adapter and | |
506 | * try again, but only once. | |
507 | */ | |
bbedefcc ME |
508 | retry: |
509 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
510 | adapter->buffer_list_dma, rxq_desc.desc, | |
511 | adapter->filter_list_dma, mac_address); | |
512 | ||
513 | if (rc != H_SUCCESS && try_again) { | |
514 | do { | |
515 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
516 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
517 | ||
518 | try_again = 0; | |
519 | goto retry; | |
520 | } | |
521 | ||
522 | return rc; | |
523 | } | |
524 | ||
1da177e4 LT |
525 | static int ibmveth_open(struct net_device *netdev) |
526 | { | |
4cf1653a | 527 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 528 | u64 mac_address = 0; |
b6d35182 | 529 | int rxq_entries = 1; |
1da177e4 LT |
530 | unsigned long lpar_rc; |
531 | int rc; | |
532 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 533 | int i; |
8d8bb39b | 534 | struct device *dev; |
1da177e4 | 535 | |
c43ced18 | 536 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 537 | |
bea3348e SH |
538 | napi_enable(&adapter->napi); |
539 | ||
517e80e6 | 540 | for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
b6d35182 | 541 | rxq_entries += adapter->rx_buff_pool[i].size; |
d7fbeba6 | 542 | |
1da177e4 LT |
543 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
544 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 545 | |
f148f61d | 546 | if (!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
21c2dece SL |
547 | netdev_err(netdev, "unable to allocate filter or buffer list " |
548 | "pages\n"); | |
88426f2a DK |
549 | rc = -ENOMEM; |
550 | goto err_out; | |
1da177e4 LT |
551 | } |
552 | ||
d90c92fe SL |
553 | dev = &adapter->vdev->dev; |
554 | ||
f148f61d SL |
555 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
556 | rxq_entries; | |
d90c92fe | 557 | adapter->rx_queue.queue_addr = |
d0320f75 JP |
558 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
559 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
f148f61d | 560 | if (!adapter->rx_queue.queue_addr) { |
88426f2a DK |
561 | rc = -ENOMEM; |
562 | goto err_out; | |
1da177e4 LT |
563 | } |
564 | ||
8d8bb39b | 565 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 566 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 567 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 568 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
1da177e4 | 569 | |
8d8bb39b | 570 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
d90c92fe | 571 | (dma_mapping_error(dev, adapter->filter_list_dma))) { |
21c2dece SL |
572 | netdev_err(netdev, "unable to map filter or buffer list " |
573 | "pages\n"); | |
88426f2a DK |
574 | rc = -ENOMEM; |
575 | goto err_out; | |
1da177e4 LT |
576 | } |
577 | ||
578 | adapter->rx_queue.index = 0; | |
579 | adapter->rx_queue.num_slots = rxq_entries; | |
580 | adapter->rx_queue.toggle = 1; | |
581 | ||
1da177e4 LT |
582 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
583 | mac_address = mac_address >> 16; | |
584 | ||
f148f61d SL |
585 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
586 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
587 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
588 | ||
c43ced18 SL |
589 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
590 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
591 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 592 | |
4347ef15 SL |
593 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
594 | ||
bbedefcc | 595 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 596 | |
f148f61d | 597 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
598 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
599 | lpar_rc); | |
600 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
601 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
602 | adapter->buffer_list_dma, |
603 | adapter->filter_list_dma, | |
604 | rxq_desc.desc, | |
605 | mac_address); | |
88426f2a DK |
606 | rc = -ENONET; |
607 | goto err_out; | |
1da177e4 LT |
608 | } |
609 | ||
f148f61d SL |
610 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
611 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
612 | continue; |
613 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 614 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 615 | adapter->rx_buff_pool[i].active = 0; |
88426f2a DK |
616 | rc = -ENOMEM; |
617 | goto err_out; | |
860f242e SL |
618 | } |
619 | } | |
620 | ||
c43ced18 | 621 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
622 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
623 | netdev); | |
624 | if (rc != 0) { | |
21c2dece SL |
625 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
626 | netdev->irq, rc); | |
1da177e4 | 627 | do { |
95de86cf BK |
628 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
629 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 630 | |
88426f2a | 631 | goto err_out; |
1da177e4 LT |
632 | } |
633 | ||
1096d63d RJ |
634 | adapter->bounce_buffer = |
635 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
636 | if (!adapter->bounce_buffer) { | |
88426f2a | 637 | rc = -ENOMEM; |
e0e8ab59 | 638 | goto err_out_free_irq; |
1096d63d RJ |
639 | } |
640 | adapter->bounce_buffer_dma = | |
641 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
642 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 643 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
21c2dece | 644 | netdev_err(netdev, "unable to map bounce buffer\n"); |
88426f2a | 645 | rc = -ENOMEM; |
e0e8ab59 | 646 | goto err_out_free_irq; |
1096d63d RJ |
647 | } |
648 | ||
c43ced18 | 649 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 650 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 651 | |
e2adbcb4 | 652 | netif_start_queue(netdev); |
1da177e4 | 653 | |
c43ced18 | 654 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
655 | |
656 | return 0; | |
88426f2a | 657 | |
e0e8ab59 DK |
658 | err_out_free_irq: |
659 | free_irq(netdev->irq, netdev); | |
88426f2a DK |
660 | err_out: |
661 | ibmveth_cleanup(adapter); | |
662 | napi_disable(&adapter->napi); | |
663 | return rc; | |
1da177e4 LT |
664 | } |
665 | ||
666 | static int ibmveth_close(struct net_device *netdev) | |
667 | { | |
4cf1653a | 668 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 669 | long lpar_rc; |
d7fbeba6 | 670 | |
c43ced18 | 671 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 672 | |
bea3348e SH |
673 | napi_disable(&adapter->napi); |
674 | ||
860f242e SL |
675 | if (!adapter->pool_config) |
676 | netif_stop_queue(netdev); | |
1da177e4 | 677 | |
ee2e6114 | 678 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 679 | |
1da177e4 LT |
680 | do { |
681 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 682 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 683 | |
f148f61d | 684 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
685 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
686 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
687 | } |
688 | ||
ee2e6114 RJ |
689 | free_irq(netdev->irq, netdev); |
690 | ||
f148f61d SL |
691 | adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) + |
692 | 4096 - 8); | |
1da177e4 LT |
693 | |
694 | ibmveth_cleanup(adapter); | |
695 | ||
c43ced18 | 696 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
f148f61d SL |
701 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
702 | { | |
703 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | | |
704 | SUPPORTED_FIBRE); | |
705 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | | |
706 | ADVERTISED_FIBRE); | |
70739497 | 707 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
1da177e4 LT |
708 | cmd->duplex = DUPLEX_FULL; |
709 | cmd->port = PORT_FIBRE; | |
710 | cmd->phy_address = 0; | |
711 | cmd->transceiver = XCVR_INTERNAL; | |
712 | cmd->autoneg = AUTONEG_ENABLE; | |
713 | cmd->maxtxpkt = 0; | |
714 | cmd->maxrxpkt = 1; | |
715 | return 0; | |
716 | } | |
717 | ||
f148f61d SL |
718 | static void netdev_get_drvinfo(struct net_device *dev, |
719 | struct ethtool_drvinfo *info) | |
720 | { | |
7826d43f JP |
721 | strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
722 | strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); | |
1da177e4 LT |
723 | } |
724 | ||
c8f44aff MM |
725 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
726 | netdev_features_t features) | |
5fc7e01c | 727 | { |
b9367bf3 MM |
728 | /* |
729 | * Since the ibmveth firmware interface does not have the | |
730 | * concept of separate tx/rx checksum offload enable, if rx | |
731 | * checksum is disabled we also have to disable tx checksum | |
732 | * offload. Once we disable rx checksum offload, we are no | |
733 | * longer allowed to send tx buffers that are not properly | |
734 | * checksummed. | |
735 | */ | |
5fc7e01c | 736 | |
b9367bf3 MM |
737 | if (!(features & NETIF_F_RXCSUM)) |
738 | features &= ~NETIF_F_ALL_CSUM; | |
5fc7e01c | 739 | |
b9367bf3 | 740 | return features; |
5fc7e01c BK |
741 | } |
742 | ||
b9367bf3 | 743 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 744 | { |
4cf1653a | 745 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 746 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 747 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 748 | long ret, ret4, ret6; |
5fc7e01c BK |
749 | int rc1 = 0, rc2 = 0; |
750 | int restart = 0; | |
751 | ||
752 | if (netif_running(dev)) { | |
753 | restart = 1; | |
754 | adapter->pool_config = 1; | |
755 | ibmveth_close(dev); | |
756 | adapter->pool_config = 0; | |
757 | } | |
758 | ||
79ef4a4d BK |
759 | set_attr = 0; |
760 | clr_attr = 0; | |
fb82fd20 AB |
761 | set_attr6 = 0; |
762 | clr_attr6 = 0; | |
5fc7e01c | 763 | |
ab78df75 | 764 | if (data) { |
79ef4a4d | 765 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
766 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
767 | } else { | |
79ef4a4d | 768 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
769 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
770 | } | |
5fc7e01c | 771 | |
79ef4a4d | 772 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 773 | |
79ef4a4d BK |
774 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
775 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
776 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
fb82fd20 | 777 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 778 | set_attr, &ret_attr); |
5fc7e01c | 779 | |
fb82fd20 | 780 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
781 | netdev_err(dev, "unable to change IPv4 checksum " |
782 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
783 | data, ret4); |
784 | ||
785 | h_illan_attributes(adapter->vdev->unit_address, | |
786 | set_attr, clr_attr, &ret_attr); | |
787 | ||
788 | if (data == 1) | |
789 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 790 | |
f148f61d | 791 | } else { |
ab78df75 | 792 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 793 | } |
ab78df75 SL |
794 | |
795 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
796 | clr_attr6, set_attr6, &ret_attr); | |
797 | ||
798 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
799 | netdev_err(dev, "unable to change IPv6 checksum " |
800 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
801 | data, ret6); |
802 | ||
803 | h_illan_attributes(adapter->vdev->unit_address, | |
804 | set_attr6, clr_attr6, &ret_attr); | |
805 | ||
806 | if (data == 1) | |
807 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 808 | |
ab78df75 SL |
809 | } else |
810 | adapter->fw_ipv6_csum_support = data; | |
811 | ||
fb82fd20 | 812 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 813 | adapter->rx_csum = data; |
ab78df75 SL |
814 | else |
815 | rc1 = -EIO; | |
5fc7e01c BK |
816 | } else { |
817 | rc1 = -EIO; | |
21c2dece SL |
818 | netdev_err(dev, "unable to change checksum offload settings." |
819 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
820 | ret_attr); | |
5fc7e01c BK |
821 | } |
822 | ||
823 | if (restart) | |
824 | rc2 = ibmveth_open(dev); | |
825 | ||
826 | return rc1 ? rc1 : rc2; | |
827 | } | |
828 | ||
c8f44aff MM |
829 | static int ibmveth_set_features(struct net_device *dev, |
830 | netdev_features_t features) | |
5fc7e01c | 831 | { |
4cf1653a | 832 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 MM |
833 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
834 | int rc; | |
5fc7e01c | 835 | |
b9367bf3 | 836 | if (rx_csum == adapter->rx_csum) |
5fc7e01c BK |
837 | return 0; |
838 | ||
b9367bf3 MM |
839 | rc = ibmveth_set_csum_offload(dev, rx_csum); |
840 | if (rc && !adapter->rx_csum) | |
841 | dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM); | |
5fc7e01c BK |
842 | |
843 | return rc; | |
844 | } | |
845 | ||
ddbb4de9 BK |
846 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
847 | { | |
848 | int i; | |
849 | ||
850 | if (stringset != ETH_SS_STATS) | |
851 | return; | |
852 | ||
853 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
854 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
855 | } | |
856 | ||
b9f2c044 | 857 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 858 | { |
b9f2c044 JG |
859 | switch (sset) { |
860 | case ETH_SS_STATS: | |
861 | return ARRAY_SIZE(ibmveth_stats); | |
862 | default: | |
863 | return -EOPNOTSUPP; | |
864 | } | |
ddbb4de9 BK |
865 | } |
866 | ||
867 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
868 | struct ethtool_stats *stats, u64 *data) | |
869 | { | |
870 | int i; | |
4cf1653a | 871 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
872 | |
873 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
874 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
875 | } | |
876 | ||
7282d491 | 877 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
878 | .get_drvinfo = netdev_get_drvinfo, |
879 | .get_settings = netdev_get_settings, | |
ed4ba4b5 | 880 | .get_link = ethtool_op_get_link, |
ddbb4de9 | 881 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 882 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 883 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
1da177e4 LT |
884 | }; |
885 | ||
886 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
887 | { | |
888 | return -EOPNOTSUPP; | |
889 | } | |
890 | ||
891 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
892 | ||
6e8ab30e SL |
893 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
894 | union ibmveth_buf_desc *descs) | |
1da177e4 | 895 | { |
1da177e4 LT |
896 | unsigned long correlator; |
897 | unsigned int retry_count; | |
6e8ab30e SL |
898 | unsigned long ret; |
899 | ||
900 | /* | |
901 | * The retry count sets a maximum for the number of broadcast and | |
902 | * multicast destinations within the system. | |
903 | */ | |
904 | retry_count = 1024; | |
905 | correlator = 0; | |
906 | do { | |
907 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
908 | descs[0].desc, descs[1].desc, | |
909 | descs[2].desc, descs[3].desc, | |
910 | descs[4].desc, descs[5].desc, | |
911 | correlator, &correlator); | |
912 | } while ((ret == H_BUSY) && (retry_count--)); | |
913 | ||
914 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
915 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
916 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
917 | return 1; |
918 | } | |
919 | ||
920 | return 0; | |
921 | } | |
60296d9e | 922 | |
6e8ab30e SL |
923 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
924 | struct net_device *netdev) | |
925 | { | |
926 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
927 | unsigned int desc_flags; | |
928 | union ibmveth_buf_desc descs[6]; | |
929 | int last, i; | |
930 | int force_bounce = 0; | |
b93da27f | 931 | dma_addr_t dma_addr; |
6e8ab30e SL |
932 | |
933 | /* | |
934 | * veth handles a maximum of 6 segments including the header, so | |
935 | * we have to linearize the skb if there are more than this. | |
936 | */ | |
937 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
938 | netdev->stats.tx_dropped++; | |
939 | goto out; | |
940 | } | |
1da177e4 | 941 | |
6e8ab30e | 942 | /* veth can't checksum offload UDP */ |
f4ff2872 | 943 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
944 | ((skb->protocol == htons(ETH_P_IP) && |
945 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
946 | (skb->protocol == htons(ETH_P_IPV6) && | |
947 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
948 | skb_checksum_help(skb)) { | |
949 | ||
21c2dece | 950 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 951 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
952 | goto out; |
953 | } | |
954 | ||
6e8ab30e SL |
955 | desc_flags = IBMVETH_BUF_VALID; |
956 | ||
f4ff2872 | 957 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
958 | unsigned char *buf = skb_transport_header(skb) + |
959 | skb->csum_offset; | |
f4ff2872 | 960 | |
6e8ab30e | 961 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
962 | |
963 | /* Need to zero out the checksum */ | |
964 | buf[0] = 0; | |
965 | buf[1] = 0; | |
966 | } | |
967 | ||
6e8ab30e SL |
968 | retry_bounce: |
969 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 970 | |
6e8ab30e SL |
971 | /* |
972 | * If a linear packet is below the rx threshold then | |
973 | * copy it into the static bounce buffer. This avoids the | |
974 | * cost of a TCE insert and remove. | |
975 | */ | |
976 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
977 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
978 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
979 | skb->len); | |
1da177e4 | 980 | |
6e8ab30e SL |
981 | descs[0].fields.flags_len = desc_flags | skb->len; |
982 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
983 | ||
984 | if (ibmveth_send(adapter, descs)) { | |
985 | adapter->tx_send_failed++; | |
986 | netdev->stats.tx_dropped++; | |
987 | } else { | |
988 | netdev->stats.tx_packets++; | |
989 | netdev->stats.tx_bytes += skb->len; | |
990 | } | |
991 | ||
992 | goto out; | |
993 | } | |
994 | ||
995 | /* Map the header */ | |
b93da27f AB |
996 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
997 | skb_headlen(skb), DMA_TO_DEVICE); | |
998 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
6e8ab30e SL |
999 | goto map_failed; |
1000 | ||
1001 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
b93da27f | 1002 | descs[0].fields.address = dma_addr; |
6e8ab30e SL |
1003 | |
1004 | /* Map the frags */ | |
1005 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
9e903e08 | 1006 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
6e8ab30e | 1007 | |
8838a538 | 1008 | dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
9e903e08 | 1009 | skb_frag_size(frag), DMA_TO_DEVICE); |
6e8ab30e SL |
1010 | |
1011 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1012 | goto map_failed_frags; | |
1013 | ||
9e903e08 | 1014 | descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
6e8ab30e SL |
1015 | descs[i+1].fields.address = dma_addr; |
1016 | } | |
1017 | ||
1018 | if (ibmveth_send(adapter, descs)) { | |
1019 | adapter->tx_send_failed++; | |
1020 | netdev->stats.tx_dropped++; | |
1da177e4 | 1021 | } else { |
6e8ab30e SL |
1022 | netdev->stats.tx_packets++; |
1023 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1024 | } |
1025 | ||
33a48ab1 BK |
1026 | dma_unmap_single(&adapter->vdev->dev, |
1027 | descs[0].fields.address, | |
1028 | descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1029 | DMA_TO_DEVICE); | |
1030 | ||
1031 | for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++) | |
6e8ab30e SL |
1032 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, |
1033 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1034 | DMA_TO_DEVICE); | |
1da177e4 | 1035 | |
e8cb7eb4 | 1036 | out: |
1da177e4 | 1037 | dev_kfree_skb(skb); |
6ed10654 | 1038 | return NETDEV_TX_OK; |
6e8ab30e SL |
1039 | |
1040 | map_failed_frags: | |
1041 | last = i+1; | |
1042 | for (i = 0; i < last; i++) | |
1043 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1044 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1045 | DMA_TO_DEVICE); | |
1046 | ||
1047 | map_failed: | |
1048 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
21c2dece | 1049 | netdev_err(netdev, "tx: unable to map xmit buffer\n"); |
6e8ab30e SL |
1050 | adapter->tx_map_failed++; |
1051 | skb_linearize(skb); | |
1052 | force_bounce = 1; | |
1053 | goto retry_bounce; | |
1da177e4 LT |
1054 | } |
1055 | ||
bea3348e | 1056 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1057 | { |
f148f61d SL |
1058 | struct ibmveth_adapter *adapter = |
1059 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1060 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1061 | int frames_processed = 0; |
1da177e4 LT |
1062 | unsigned long lpar_rc; |
1063 | ||
f148f61d | 1064 | restart_poll: |
1da177e4 | 1065 | do { |
bea3348e SH |
1066 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1067 | break; | |
1da177e4 | 1068 | |
f89e49e7 | 1069 | smp_rmb(); |
bea3348e SH |
1070 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1071 | wmb(); /* suggested by larson1 */ | |
1072 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1073 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1074 | ibmveth_rxq_recycle_buffer(adapter); |
1075 | } else { | |
8d86c61a | 1076 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1077 | int length = ibmveth_rxq_frame_length(adapter); |
1078 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1079 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1080 | ||
bea3348e | 1081 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1082 | |
8d86c61a SL |
1083 | new_skb = NULL; |
1084 | if (length < rx_copybreak) | |
1085 | new_skb = netdev_alloc_skb(netdev, length); | |
1086 | ||
1087 | if (new_skb) { | |
1088 | skb_copy_to_linear_data(new_skb, | |
1089 | skb->data + offset, | |
1090 | length); | |
0c26b677 SL |
1091 | if (rx_flush) |
1092 | ibmveth_flush_buffer(skb->data, | |
1093 | length + offset); | |
c6f59d13 AB |
1094 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1095 | kfree_skb(skb); | |
8d86c61a | 1096 | skb = new_skb; |
8d86c61a SL |
1097 | } else { |
1098 | ibmveth_rxq_harvest_buffer(adapter); | |
1099 | skb_reserve(skb, offset); | |
1100 | } | |
1da177e4 | 1101 | |
bea3348e SH |
1102 | skb_put(skb, length); |
1103 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1104 | |
8d86c61a SL |
1105 | if (csum_good) |
1106 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1107 | ||
bea3348e | 1108 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1109 | |
09f75cd7 JG |
1110 | netdev->stats.rx_packets++; |
1111 | netdev->stats.rx_bytes += length; | |
bea3348e | 1112 | frames_processed++; |
1da177e4 | 1113 | } |
bea3348e | 1114 | } while (frames_processed < budget); |
1da177e4 | 1115 | |
e2adbcb4 | 1116 | ibmveth_replenish_task(adapter); |
1da177e4 | 1117 | |
bea3348e SH |
1118 | if (frames_processed < budget) { |
1119 | /* We think we are done - reenable interrupts, | |
1120 | * then check once more to make sure we are done. | |
1121 | */ | |
1122 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1123 | VIO_IRQ_ENABLE); | |
1da177e4 | 1124 | |
6485911a | 1125 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1126 | |
288379f0 | 1127 | napi_complete(napi); |
1da177e4 | 1128 | |
bea3348e | 1129 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1130 | napi_reschedule(napi)) { |
bea3348e SH |
1131 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1132 | VIO_IRQ_DISABLE); | |
1133 | goto restart_poll; | |
1134 | } | |
1da177e4 LT |
1135 | } |
1136 | ||
bea3348e | 1137 | return frames_processed; |
1da177e4 LT |
1138 | } |
1139 | ||
7d12e780 | 1140 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1141 | { |
1da177e4 | 1142 | struct net_device *netdev = dev_instance; |
4cf1653a | 1143 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1144 | unsigned long lpar_rc; |
1145 | ||
288379f0 | 1146 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1147 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1148 | VIO_IRQ_DISABLE); | |
6485911a | 1149 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1150 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1151 | } |
1152 | return IRQ_HANDLED; | |
1153 | } | |
1154 | ||
1da177e4 LT |
1155 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1156 | { | |
4cf1653a | 1157 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1158 | unsigned long lpar_rc; |
1159 | ||
4cd24eaf JP |
1160 | if ((netdev->flags & IFF_PROMISC) || |
1161 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1162 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1163 | IbmVethMcastEnableRecv | | |
1164 | IbmVethMcastDisableFiltering, | |
1165 | 0); | |
f148f61d | 1166 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1167 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1168 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1169 | } |
1170 | } else { | |
22bedad3 | 1171 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1172 | /* clear the filter table & disable filtering */ |
1173 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1174 | IbmVethMcastEnableRecv | | |
1175 | IbmVethMcastDisableFiltering | | |
1176 | IbmVethMcastClearFilterTable, | |
1177 | 0); | |
f148f61d | 1178 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1179 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1180 | "attempting to clear filter table\n", | |
1181 | lpar_rc); | |
1da177e4 LT |
1182 | } |
1183 | /* add the addresses to the filter table */ | |
22bedad3 | 1184 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1185 | /* add the multicast address to the filter table */ |
1da177e4 | 1186 | unsigned long mcast_addr = 0; |
d458cdf7 | 1187 | memcpy(((char *)&mcast_addr)+2, ha->addr, ETH_ALEN); |
1da177e4 LT |
1188 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1189 | IbmVethMcastAddFilter, | |
1190 | mcast_addr); | |
f148f61d | 1191 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1192 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1193 | "when adding an entry to the filter " | |
1194 | "table\n", lpar_rc); | |
1da177e4 LT |
1195 | } |
1196 | } | |
d7fbeba6 | 1197 | |
1da177e4 LT |
1198 | /* re-enable filtering */ |
1199 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1200 | IbmVethMcastEnableFiltering, | |
1201 | 0); | |
f148f61d | 1202 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1203 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1204 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1205 | } |
1206 | } | |
1207 | } | |
1208 | ||
1209 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1210 | { | |
4cf1653a | 1211 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1212 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1213 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1214 | int i, rc; |
1215 | int need_restart = 0; | |
b6d35182 | 1216 | |
517e80e6 | 1217 | if (new_mtu < IBMVETH_MIN_MTU) |
1da177e4 | 1218 | return -EINVAL; |
b6d35182 | 1219 | |
517e80e6 | 1220 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
ce6eea58 BK |
1221 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) |
1222 | break; | |
1223 | ||
517e80e6 | 1224 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1225 | return -EINVAL; |
1226 | ||
ea866e65 SL |
1227 | /* Deactivate all the buffer pools so that the next loop can activate |
1228 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1229 | if (netif_running(adapter->netdev)) { |
1230 | need_restart = 1; | |
1231 | adapter->pool_config = 1; | |
1232 | ibmveth_close(adapter->netdev); | |
1233 | adapter->pool_config = 0; | |
1234 | } | |
ea866e65 | 1235 | |
860f242e | 1236 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1237 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1238 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1239 | |
860f242e | 1240 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1241 | dev->mtu = new_mtu; |
1242 | vio_cmo_set_dev_desired(viodev, | |
1243 | ibmveth_get_desired_dma | |
1244 | (viodev)); | |
0645bab7 RJ |
1245 | if (need_restart) { |
1246 | return ibmveth_open(adapter->netdev); | |
1247 | } | |
860f242e | 1248 | return 0; |
b6d35182 | 1249 | } |
b6d35182 | 1250 | } |
0645bab7 RJ |
1251 | |
1252 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1253 | return rc; | |
1254 | ||
860f242e | 1255 | return -EINVAL; |
1da177e4 LT |
1256 | } |
1257 | ||
6b422374 SL |
1258 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1259 | static void ibmveth_poll_controller(struct net_device *dev) | |
1260 | { | |
4cf1653a | 1261 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1262 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1263 | } |
1264 | #endif | |
1265 | ||
1096d63d RJ |
1266 | /** |
1267 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1268 | * | |
1269 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1270 | * | |
1271 | * Return value: | |
1272 | * Number of bytes of IO data the driver will need to perform well. | |
1273 | */ | |
1274 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1275 | { | |
1276 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1277 | struct ibmveth_adapter *adapter; | |
d0847757 | 1278 | struct iommu_table *tbl; |
1096d63d RJ |
1279 | unsigned long ret; |
1280 | int i; | |
1281 | int rxqentries = 1; | |
1282 | ||
d0847757 AP |
1283 | tbl = get_iommu_table_base(&vdev->dev); |
1284 | ||
1096d63d RJ |
1285 | /* netdev inits at probe time along with the structures we need below*/ |
1286 | if (netdev == NULL) | |
d0847757 | 1287 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); |
1096d63d RJ |
1288 | |
1289 | adapter = netdev_priv(netdev); | |
1290 | ||
1291 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
d0847757 | 1292 | ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); |
1096d63d | 1293 | |
517e80e6 | 1294 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1295 | /* add the size of the active receive buffers */ |
1296 | if (adapter->rx_buff_pool[i].active) | |
1297 | ret += | |
1298 | adapter->rx_buff_pool[i].size * | |
1299 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
d0847757 | 1300 | buff_size, tbl); |
1096d63d RJ |
1301 | rxqentries += adapter->rx_buff_pool[i].size; |
1302 | } | |
1303 | /* add the size of the receive queue entries */ | |
d0847757 AP |
1304 | ret += IOMMU_PAGE_ALIGN( |
1305 | rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); | |
1096d63d RJ |
1306 | |
1307 | return ret; | |
1308 | } | |
1309 | ||
e186d174 AB |
1310 | static const struct net_device_ops ibmveth_netdev_ops = { |
1311 | .ndo_open = ibmveth_open, | |
1312 | .ndo_stop = ibmveth_close, | |
1313 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1314 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
e186d174 AB |
1315 | .ndo_do_ioctl = ibmveth_ioctl, |
1316 | .ndo_change_mtu = ibmveth_change_mtu, | |
b9367bf3 MM |
1317 | .ndo_fix_features = ibmveth_fix_features, |
1318 | .ndo_set_features = ibmveth_set_features, | |
e186d174 AB |
1319 | .ndo_validate_addr = eth_validate_addr, |
1320 | .ndo_set_mac_address = eth_mac_addr, | |
1321 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1322 | .ndo_poll_controller = ibmveth_poll_controller, | |
1323 | #endif | |
1324 | }; | |
1325 | ||
1dd06ae8 | 1326 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1327 | { |
13f85203 | 1328 | int rc, i, mac_len; |
1da177e4 | 1329 | struct net_device *netdev; |
9dc83afd | 1330 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1331 | unsigned char *mac_addr_p; |
1332 | unsigned int *mcastFilterSize_p; | |
1333 | ||
c43ced18 SL |
1334 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1335 | dev->unit_address); | |
1da177e4 | 1336 | |
f148f61d | 1337 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
13f85203 | 1338 | &mac_len); |
f148f61d | 1339 | if (!mac_addr_p) { |
21c2dece | 1340 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1341 | return -EINVAL; |
1da177e4 | 1342 | } |
13f85203 BH |
1343 | /* Workaround for old/broken pHyp */ |
1344 | if (mac_len == 8) | |
1345 | mac_addr_p += 2; | |
1346 | else if (mac_len != 6) { | |
1347 | dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", | |
1348 | mac_len); | |
1349 | return -EINVAL; | |
1350 | } | |
d7fbeba6 | 1351 | |
f148f61d | 1352 | mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev, |
493a684a | 1353 | VETH_MCAST_FILTER_SIZE, NULL); |
f148f61d | 1354 | if (!mcastFilterSize_p) { |
21c2dece SL |
1355 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1356 | "attribute\n"); | |
be35ae9e | 1357 | return -EINVAL; |
1da177e4 | 1358 | } |
d7fbeba6 | 1359 | |
1da177e4 LT |
1360 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1361 | ||
f148f61d | 1362 | if (!netdev) |
1da177e4 LT |
1363 | return -ENOMEM; |
1364 | ||
4cf1653a | 1365 | adapter = netdev_priv(netdev); |
c7ae011d | 1366 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1367 | |
1368 | adapter->vdev = dev; | |
1369 | adapter->netdev = netdev; | |
f148f61d | 1370 | adapter->mcastFilterSize = *mcastFilterSize_p; |
860f242e | 1371 | adapter->pool_config = 0; |
d7fbeba6 | 1372 | |
bea3348e SH |
1373 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1374 | ||
1da177e4 | 1375 | adapter->mac_addr = 0; |
d458cdf7 | 1376 | memcpy(&adapter->mac_addr, mac_addr_p, ETH_ALEN); |
1da177e4 | 1377 | |
1da177e4 | 1378 | netdev->irq = dev->irq; |
e186d174 AB |
1379 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1380 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1381 | SET_NETDEV_DEV(netdev, &dev->dev); |
b9367bf3 MM |
1382 | netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | |
1383 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
1384 | netdev->features |= netdev->hw_features; | |
1da177e4 | 1385 | |
d44b5e07 | 1386 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1387 | |
f148f61d | 1388 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1389 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1390 | int error; |
1391 | ||
d7fbeba6 JG |
1392 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1393 | pool_count[i], pool_size[i], | |
860f242e | 1394 | pool_active[i]); |
8dde2a96 GKH |
1395 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1396 | &dev->dev.kobj, "pool%d", i); | |
1397 | if (!error) | |
1398 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1399 | } |
1da177e4 | 1400 | |
c43ced18 | 1401 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
1da177e4 | 1402 | |
1da177e4 LT |
1403 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1404 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1405 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1406 | ||
c43ced18 | 1407 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1408 | |
b801a4e7 MM |
1409 | ibmveth_set_features(netdev, netdev->features); |
1410 | ||
1da177e4 LT |
1411 | rc = register_netdev(netdev); |
1412 | ||
f148f61d | 1413 | if (rc) { |
c43ced18 | 1414 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1415 | free_netdev(netdev); |
1416 | return rc; | |
1417 | } | |
1418 | ||
c43ced18 | 1419 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1420 | |
1da177e4 LT |
1421 | return 0; |
1422 | } | |
1423 | ||
e11787a2 | 1424 | static int ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1425 | { |
c7ae011d | 1426 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1427 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1428 | int i; |
1429 | ||
f148f61d | 1430 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1431 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1432 | |
1433 | unregister_netdev(netdev); | |
1434 | ||
1da177e4 | 1435 | free_netdev(netdev); |
1096d63d RJ |
1436 | dev_set_drvdata(&dev->dev, NULL); |
1437 | ||
1da177e4 LT |
1438 | return 0; |
1439 | } | |
1440 | ||
860f242e SL |
1441 | static struct attribute veth_active_attr; |
1442 | static struct attribute veth_num_attr; | |
1443 | static struct attribute veth_size_attr; | |
1444 | ||
f148f61d SL |
1445 | static ssize_t veth_pool_show(struct kobject *kobj, |
1446 | struct attribute *attr, char *buf) | |
860f242e | 1447 | { |
d7fbeba6 | 1448 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1449 | struct ibmveth_buff_pool, |
1450 | kobj); | |
1451 | ||
1452 | if (attr == &veth_active_attr) | |
1453 | return sprintf(buf, "%d\n", pool->active); | |
1454 | else if (attr == &veth_num_attr) | |
1455 | return sprintf(buf, "%d\n", pool->size); | |
1456 | else if (attr == &veth_size_attr) | |
1457 | return sprintf(buf, "%d\n", pool->buff_size); | |
1458 | return 0; | |
1459 | } | |
1460 | ||
f148f61d SL |
1461 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1462 | const char *buf, size_t count) | |
860f242e | 1463 | { |
d7fbeba6 | 1464 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1465 | struct ibmveth_buff_pool, |
1466 | kobj); | |
c7ae011d GKH |
1467 | struct net_device *netdev = dev_get_drvdata( |
1468 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1469 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1470 | long value = simple_strtol(buf, NULL, 10); |
1471 | long rc; | |
1472 | ||
1473 | if (attr == &veth_active_attr) { | |
1474 | if (value && !pool->active) { | |
4aa9c93e | 1475 | if (netif_running(netdev)) { |
f148f61d | 1476 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1477 | netdev_err(netdev, |
1478 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1479 | return -ENOMEM; |
1480 | } | |
1481 | pool->active = 1; | |
1482 | adapter->pool_config = 1; | |
1483 | ibmveth_close(netdev); | |
1484 | adapter->pool_config = 0; | |
1485 | if ((rc = ibmveth_open(netdev))) | |
1486 | return rc; | |
f148f61d | 1487 | } else { |
4aa9c93e | 1488 | pool->active = 1; |
f148f61d | 1489 | } |
860f242e SL |
1490 | } else if (!value && pool->active) { |
1491 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1492 | int i; | |
1493 | /* Make sure there is a buffer pool with buffers that | |
1494 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1495 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1496 | if (pool == &adapter->rx_buff_pool[i]) |
1497 | continue; | |
1498 | if (!adapter->rx_buff_pool[i].active) | |
1499 | continue; | |
76b9cfcc BK |
1500 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1501 | break; | |
860f242e | 1502 | } |
76b9cfcc | 1503 | |
517e80e6 | 1504 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1505 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1506 | return -EPERM; |
1507 | } | |
76b9cfcc | 1508 | |
76b9cfcc BK |
1509 | if (netif_running(netdev)) { |
1510 | adapter->pool_config = 1; | |
1511 | ibmveth_close(netdev); | |
ea866e65 | 1512 | pool->active = 0; |
76b9cfcc BK |
1513 | adapter->pool_config = 0; |
1514 | if ((rc = ibmveth_open(netdev))) | |
1515 | return rc; | |
1516 | } | |
ea866e65 | 1517 | pool->active = 0; |
860f242e SL |
1518 | } |
1519 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1520 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1521 | return -EINVAL; |
f148f61d | 1522 | } else { |
4aa9c93e BK |
1523 | if (netif_running(netdev)) { |
1524 | adapter->pool_config = 1; | |
1525 | ibmveth_close(netdev); | |
1526 | adapter->pool_config = 0; | |
1527 | pool->size = value; | |
1528 | if ((rc = ibmveth_open(netdev))) | |
1529 | return rc; | |
f148f61d | 1530 | } else { |
4aa9c93e | 1531 | pool->size = value; |
f148f61d | 1532 | } |
860f242e SL |
1533 | } |
1534 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1535 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1536 | return -EINVAL; |
f148f61d | 1537 | } else { |
4aa9c93e BK |
1538 | if (netif_running(netdev)) { |
1539 | adapter->pool_config = 1; | |
1540 | ibmveth_close(netdev); | |
1541 | adapter->pool_config = 0; | |
1542 | pool->buff_size = value; | |
1543 | if ((rc = ibmveth_open(netdev))) | |
1544 | return rc; | |
f148f61d | 1545 | } else { |
4aa9c93e | 1546 | pool->buff_size = value; |
f148f61d | 1547 | } |
860f242e SL |
1548 | } |
1549 | } | |
1550 | ||
1551 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1552 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1553 | return count; |
1554 | } | |
1555 | ||
1556 | ||
f148f61d SL |
1557 | #define ATTR(_name, _mode) \ |
1558 | struct attribute veth_##_name##_attr = { \ | |
1559 | .name = __stringify(_name), .mode = _mode, \ | |
1560 | }; | |
860f242e SL |
1561 | |
1562 | static ATTR(active, 0644); | |
1563 | static ATTR(num, 0644); | |
1564 | static ATTR(size, 0644); | |
1565 | ||
f148f61d | 1566 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1567 | &veth_active_attr, |
1568 | &veth_num_attr, | |
1569 | &veth_size_attr, | |
1570 | NULL, | |
1571 | }; | |
1572 | ||
52cf25d0 | 1573 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1574 | .show = veth_pool_show, |
1575 | .store = veth_pool_store, | |
1576 | }; | |
1577 | ||
1578 | static struct kobj_type ktype_veth_pool = { | |
1579 | .release = NULL, | |
1580 | .sysfs_ops = &veth_pool_ops, | |
1581 | .default_attrs = veth_pool_attrs, | |
1582 | }; | |
1583 | ||
e7a3af5d BK |
1584 | static int ibmveth_resume(struct device *dev) |
1585 | { | |
1586 | struct net_device *netdev = dev_get_drvdata(dev); | |
1587 | ibmveth_interrupt(netdev->irq, netdev); | |
1588 | return 0; | |
1589 | } | |
860f242e | 1590 | |
e11787a2 | 1591 | static struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1592 | { "network", "IBM,l-lan"}, |
fb120da6 | 1593 | { "", "" } |
1da177e4 | 1594 | }; |
1da177e4 LT |
1595 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1596 | ||
e7a3af5d BK |
1597 | static struct dev_pm_ops ibmveth_pm_ops = { |
1598 | .resume = ibmveth_resume | |
1599 | }; | |
1600 | ||
1da177e4 | 1601 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1602 | .id_table = ibmveth_device_table, |
1603 | .probe = ibmveth_probe, | |
1604 | .remove = ibmveth_remove, | |
1096d63d | 1605 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1606 | .name = ibmveth_driver_name, |
1607 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1608 | }; |
1609 | ||
1610 | static int __init ibmveth_module_init(void) | |
1611 | { | |
21c2dece SL |
1612 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1613 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1614 | |
1da177e4 LT |
1615 | return vio_register_driver(&ibmveth_driver); |
1616 | } | |
1617 | ||
1618 | static void __exit ibmveth_module_exit(void) | |
1619 | { | |
1620 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1621 | } |
1da177e4 LT |
1622 | |
1623 | module_init(ibmveth_module_init); | |
1624 | module_exit(ibmveth_module_exit); |