Commit | Line | Data |
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1da177e4 LT |
1 | /**************************************************************************/ |
2 | /* */ | |
3 | /* IBM eServer i/pSeries Virtual Ethernet Device Driver */ | |
4 | /* Copyright (C) 2003 IBM Corp. */ | |
5 | /* Originally written by Dave Larson (larson1@us.ibm.com) */ | |
6 | /* Maintained by Santiago Leon (santil@us.ibm.com) */ | |
7 | /* */ | |
8 | /* This program is free software; you can redistribute it and/or modify */ | |
9 | /* it under the terms of the GNU General Public License as published by */ | |
10 | /* the Free Software Foundation; either version 2 of the License, or */ | |
11 | /* (at your option) any later version. */ | |
12 | /* */ | |
13 | /* This program is distributed in the hope that it will be useful, */ | |
14 | /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ | |
15 | /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ | |
16 | /* GNU General Public License for more details. */ | |
17 | /* */ | |
18 | /* You should have received a copy of the GNU General Public License */ | |
19 | /* along with this program; if not, write to the Free Software */ | |
20 | /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */ | |
21 | /* USA */ | |
22 | /* */ | |
23 | /* This module contains the implementation of a virtual ethernet device */ | |
24 | /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */ | |
25 | /* option of the RS/6000 Platform Architechture to interface with virtual */ | |
26 | /* ethernet NICs that are presented to the partition by the hypervisor. */ | |
d7fbeba6 | 27 | /* */ |
1da177e4 | 28 | /**************************************************************************/ |
1da177e4 | 29 | |
1da177e4 | 30 | #include <linux/module.h> |
1096d63d | 31 | #include <linux/moduleparam.h> |
1da177e4 LT |
32 | #include <linux/types.h> |
33 | #include <linux/errno.h> | |
34 | #include <linux/ioport.h> | |
35 | #include <linux/dma-mapping.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/etherdevice.h> | |
39 | #include <linux/skbuff.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/mm.h> | |
e7a3af5d | 43 | #include <linux/pm.h> |
1da177e4 | 44 | #include <linux/ethtool.h> |
f4ff2872 BK |
45 | #include <linux/in.h> |
46 | #include <linux/ip.h> | |
ab78df75 | 47 | #include <linux/ipv6.h> |
5a0e3ad6 | 48 | #include <linux/slab.h> |
1da177e4 LT |
49 | #include <asm/hvcall.h> |
50 | #include <asm/atomic.h> | |
1da177e4 | 51 | #include <asm/vio.h> |
1096d63d | 52 | #include <asm/iommu.h> |
1da177e4 | 53 | #include <asm/uaccess.h> |
1096d63d | 54 | #include <asm/firmware.h> |
1da177e4 LT |
55 | |
56 | #include "ibmveth.h" | |
57 | ||
6af37fa9 | 58 | #undef DEBUG |
1da177e4 LT |
59 | |
60 | #define ibmveth_printk(fmt, args...) \ | |
f98baffb | 61 | printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) |
1da177e4 LT |
62 | |
63 | #define ibmveth_error_printk(fmt, args...) \ | |
64 | printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
65 | ||
66 | #ifdef DEBUG | |
67 | #define ibmveth_debug_printk_no_adapter(fmt, args...) \ | |
68 | printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) | |
69 | #define ibmveth_debug_printk(fmt, args...) \ | |
70 | printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
71 | #define ibmveth_assert(expr) \ | |
72 | if(!(expr)) { \ | |
73 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
74 | BUG(); \ | |
75 | } | |
76 | #else | |
77 | #define ibmveth_debug_printk_no_adapter(fmt, args...) | |
78 | #define ibmveth_debug_printk(fmt, args...) | |
d7fbeba6 | 79 | #define ibmveth_assert(expr) |
1da177e4 LT |
80 | #endif |
81 | ||
82 | static int ibmveth_open(struct net_device *dev); | |
83 | static int ibmveth_close(struct net_device *dev); | |
84 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
bea3348e | 85 | static int ibmveth_poll(struct napi_struct *napi, int budget); |
1da177e4 | 86 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
1da177e4 LT |
87 | static void ibmveth_set_multicast_list(struct net_device *dev); |
88 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
7d12e780 | 89 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 90 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 91 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
860f242e | 92 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 93 | |
1096d63d | 94 | |
1da177e4 LT |
95 | static const char ibmveth_driver_name[] = "ibmveth"; |
96 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
97 | #define ibmveth_driver_version "1.03" | |
98 | ||
99 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
100 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
101 | MODULE_LICENSE("GPL"); | |
102 | MODULE_VERSION(ibmveth_driver_version); | |
103 | ||
c08cc3cc SL |
104 | static unsigned int tx_copybreak __read_mostly = 128; |
105 | module_param(tx_copybreak, uint, 0644); | |
106 | MODULE_PARM_DESC(tx_copybreak, | |
107 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
108 | ||
8d86c61a SL |
109 | static unsigned int rx_copybreak __read_mostly = 128; |
110 | module_param(rx_copybreak, uint, 0644); | |
111 | MODULE_PARM_DESC(rx_copybreak, | |
112 | "Maximum size of packet that is copied to a new buffer on receive"); | |
113 | ||
0c26b677 SL |
114 | static unsigned int rx_flush __read_mostly = 0; |
115 | module_param(rx_flush, uint, 0644); | |
116 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
117 | ||
ddbb4de9 BK |
118 | struct ibmveth_stat { |
119 | char name[ETH_GSTRING_LEN]; | |
120 | int offset; | |
121 | }; | |
122 | ||
123 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
124 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
125 | ||
126 | struct ibmveth_stat ibmveth_stats[] = { | |
127 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
128 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
129 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
130 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
131 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
132 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
133 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
134 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
135 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
136 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
ddbb4de9 BK |
137 | }; |
138 | ||
1da177e4 | 139 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
140 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
141 | { | |
142 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
143 | } | |
144 | ||
145 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
146 | { | |
147 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; | |
148 | } | |
149 | ||
1da177e4 LT |
150 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
151 | { | |
79ef4a4d | 152 | return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); |
1da177e4 LT |
153 | } |
154 | ||
155 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
156 | { | |
79ef4a4d | 157 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); |
1da177e4 LT |
158 | } |
159 | ||
160 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
161 | { | |
79ef4a4d | 162 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); |
1da177e4 LT |
163 | } |
164 | ||
165 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
166 | { | |
167 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
168 | } | |
169 | ||
f4ff2872 BK |
170 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
171 | { | |
79ef4a4d | 172 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); |
f4ff2872 BK |
173 | } |
174 | ||
1da177e4 | 175 | /* setup the initial settings for a buffer pool */ |
860f242e | 176 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active) |
1da177e4 LT |
177 | { |
178 | pool->size = pool_size; | |
179 | pool->index = pool_index; | |
180 | pool->buff_size = buff_size; | |
c033a6d1 | 181 | pool->threshold = pool_size * 7 / 8; |
860f242e | 182 | pool->active = pool_active; |
1da177e4 LT |
183 | } |
184 | ||
185 | /* allocate and setup an buffer pool - called during open */ | |
186 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
187 | { | |
188 | int i; | |
189 | ||
d7fbeba6 | 190 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
191 | |
192 | if(!pool->free_map) { | |
193 | return -1; | |
194 | } | |
195 | ||
d7fbeba6 | 196 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
197 | if(!pool->dma_addr) { |
198 | kfree(pool->free_map); | |
199 | pool->free_map = NULL; | |
200 | return -1; | |
201 | } | |
202 | ||
a05abcb5 | 203 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
204 | |
205 | if(!pool->skbuff) { | |
206 | kfree(pool->dma_addr); | |
207 | pool->dma_addr = NULL; | |
208 | ||
209 | kfree(pool->free_map); | |
210 | pool->free_map = NULL; | |
211 | return -1; | |
212 | } | |
213 | ||
1da177e4 LT |
214 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
215 | ||
216 | for(i = 0; i < pool->size; ++i) { | |
217 | pool->free_map[i] = i; | |
218 | } | |
219 | ||
220 | atomic_set(&pool->available, 0); | |
221 | pool->producer_index = 0; | |
222 | pool->consumer_index = 0; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
0c26b677 SL |
227 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
228 | { | |
229 | unsigned long offset; | |
230 | ||
231 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
232 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
233 | } | |
234 | ||
1da177e4 LT |
235 | /* replenish the buffers for a pool. note that we don't need to |
236 | * skb_reserve these since they are used for incoming... | |
237 | */ | |
238 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
239 | { | |
240 | u32 i; | |
241 | u32 count = pool->size - atomic_read(&pool->available); | |
242 | u32 buffers_added = 0; | |
1096d63d RJ |
243 | struct sk_buff *skb; |
244 | unsigned int free_index, index; | |
245 | u64 correlator; | |
246 | unsigned long lpar_rc; | |
247 | dma_addr_t dma_addr; | |
1da177e4 LT |
248 | |
249 | mb(); | |
250 | ||
251 | for(i = 0; i < count; ++i) { | |
1da177e4 | 252 | union ibmveth_buf_desc desc; |
1da177e4 | 253 | |
003212cc | 254 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 LT |
255 | |
256 | if(!skb) { | |
257 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
258 | adapter->replenish_no_mem++; | |
259 | break; | |
260 | } | |
261 | ||
047a66d4 | 262 | free_index = pool->consumer_index; |
a613f581 SL |
263 | pool->consumer_index++; |
264 | if (pool->consumer_index >= pool->size) | |
265 | pool->consumer_index = 0; | |
1da177e4 | 266 | index = pool->free_map[free_index]; |
d7fbeba6 | 267 | |
1da177e4 LT |
268 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
269 | ibmveth_assert(pool->skbuff[index] == NULL); | |
270 | ||
271 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
272 | pool->buff_size, DMA_FROM_DEVICE); | |
273 | ||
c713e7cb | 274 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
275 | goto failure; |
276 | ||
1da177e4 LT |
277 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
278 | pool->dma_addr[index] = dma_addr; | |
279 | pool->skbuff[index] = skb; | |
280 | ||
281 | correlator = ((u64)pool->index << 32) | index; | |
282 | *(u64*)skb->data = correlator; | |
283 | ||
79ef4a4d | 284 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 285 | desc.fields.address = dma_addr; |
1da177e4 | 286 | |
0c26b677 SL |
287 | if (rx_flush) { |
288 | unsigned int len = min(pool->buff_size, | |
289 | adapter->netdev->mtu + | |
290 | IBMVETH_BUFF_OH); | |
291 | ibmveth_flush_buffer(skb->data, len); | |
292 | } | |
1da177e4 | 293 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); |
d7fbeba6 | 294 | |
1096d63d RJ |
295 | if (lpar_rc != H_SUCCESS) |
296 | goto failure; | |
297 | else { | |
1da177e4 LT |
298 | buffers_added++; |
299 | adapter->replenish_add_buff_success++; | |
300 | } | |
301 | } | |
d7fbeba6 | 302 | |
1096d63d RJ |
303 | mb(); |
304 | atomic_add(buffers_added, &(pool->available)); | |
305 | return; | |
306 | ||
307 | failure: | |
308 | pool->free_map[free_index] = index; | |
309 | pool->skbuff[index] = NULL; | |
310 | if (pool->consumer_index == 0) | |
311 | pool->consumer_index = pool->size - 1; | |
312 | else | |
313 | pool->consumer_index--; | |
c713e7cb | 314 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
315 | dma_unmap_single(&adapter->vdev->dev, |
316 | pool->dma_addr[index], pool->buff_size, | |
317 | DMA_FROM_DEVICE); | |
318 | dev_kfree_skb_any(skb); | |
319 | adapter->replenish_add_buff_failure++; | |
320 | ||
1da177e4 LT |
321 | mb(); |
322 | atomic_add(buffers_added, &(pool->available)); | |
323 | } | |
324 | ||
e2adbcb4 | 325 | /* replenish routine */ |
d7fbeba6 | 326 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 327 | { |
b6d35182 SL |
328 | int i; |
329 | ||
1da177e4 LT |
330 | adapter->replenish_task_cycles++; |
331 | ||
c033a6d1 SL |
332 | for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) { |
333 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; | |
334 | ||
335 | if (pool->active && | |
336 | (atomic_read(&pool->available) < pool->threshold)) | |
337 | ibmveth_replenish_buffer_pool(adapter, pool); | |
338 | } | |
1da177e4 LT |
339 | |
340 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
341 | } |
342 | ||
343 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
344 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
345 | { | |
346 | int i; | |
347 | ||
b4558ea9 JJ |
348 | kfree(pool->free_map); |
349 | pool->free_map = NULL; | |
1da177e4 LT |
350 | |
351 | if(pool->skbuff && pool->dma_addr) { | |
352 | for(i = 0; i < pool->size; ++i) { | |
353 | struct sk_buff *skb = pool->skbuff[i]; | |
354 | if(skb) { | |
355 | dma_unmap_single(&adapter->vdev->dev, | |
356 | pool->dma_addr[i], | |
357 | pool->buff_size, | |
358 | DMA_FROM_DEVICE); | |
359 | dev_kfree_skb_any(skb); | |
360 | pool->skbuff[i] = NULL; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | if(pool->dma_addr) { | |
366 | kfree(pool->dma_addr); | |
367 | pool->dma_addr = NULL; | |
368 | } | |
369 | ||
370 | if(pool->skbuff) { | |
371 | kfree(pool->skbuff); | |
372 | pool->skbuff = NULL; | |
373 | } | |
374 | } | |
375 | ||
376 | /* remove a buffer from a pool */ | |
377 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
378 | { | |
379 | unsigned int pool = correlator >> 32; | |
380 | unsigned int index = correlator & 0xffffffffUL; | |
381 | unsigned int free_index; | |
382 | struct sk_buff *skb; | |
383 | ||
384 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
385 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
386 | ||
387 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
388 | ||
389 | ibmveth_assert(skb != NULL); | |
390 | ||
391 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
392 | ||
393 | dma_unmap_single(&adapter->vdev->dev, | |
394 | adapter->rx_buff_pool[pool].dma_addr[index], | |
395 | adapter->rx_buff_pool[pool].buff_size, | |
396 | DMA_FROM_DEVICE); | |
397 | ||
047a66d4 | 398 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
399 | adapter->rx_buff_pool[pool].producer_index++; |
400 | if (adapter->rx_buff_pool[pool].producer_index >= | |
401 | adapter->rx_buff_pool[pool].size) | |
402 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
403 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
404 | ||
405 | mb(); | |
406 | ||
407 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
408 | } | |
409 | ||
410 | /* get the current buffer on the rx queue */ | |
411 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
412 | { | |
413 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
414 | unsigned int pool = correlator >> 32; | |
415 | unsigned int index = correlator & 0xffffffffUL; | |
416 | ||
417 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
418 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
419 | ||
420 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
421 | } | |
422 | ||
423 | /* recycle the current buffer on the rx queue */ | |
424 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
425 | { | |
426 | u32 q_index = adapter->rx_queue.index; | |
427 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
428 | unsigned int pool = correlator >> 32; | |
429 | unsigned int index = correlator & 0xffffffffUL; | |
430 | union ibmveth_buf_desc desc; | |
431 | unsigned long lpar_rc; | |
432 | ||
433 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
434 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
435 | ||
b6d35182 SL |
436 | if(!adapter->rx_buff_pool[pool].active) { |
437 | ibmveth_rxq_harvest_buffer(adapter); | |
438 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
439 | return; | |
440 | } | |
441 | ||
79ef4a4d BK |
442 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
443 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
444 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
445 | ||
446 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 447 | |
706c8c93 | 448 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
449 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
450 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
451 | } | |
452 | ||
453 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
454 | adapter->rx_queue.index = 0; | |
455 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
456 | } | |
457 | } | |
458 | ||
493a684a | 459 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
460 | { |
461 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
462 | ||
463 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
464 | adapter->rx_queue.index = 0; | |
465 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
466 | } | |
467 | } | |
468 | ||
469 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
470 | { | |
b6d35182 | 471 | int i; |
8d8bb39b | 472 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 473 | |
1da177e4 | 474 | if(adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
475 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
476 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
477 | DMA_BIDIRECTIONAL); |
478 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
479 | } | |
480 | free_page((unsigned long)adapter->buffer_list_addr); | |
481 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 482 | } |
1da177e4 LT |
483 | |
484 | if(adapter->filter_list_addr != NULL) { | |
8d8bb39b FT |
485 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
486 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
487 | DMA_BIDIRECTIONAL); |
488 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
489 | } | |
490 | free_page((unsigned long)adapter->filter_list_addr); | |
491 | adapter->filter_list_addr = NULL; | |
492 | } | |
493 | ||
494 | if(adapter->rx_queue.queue_addr != NULL) { | |
8d8bb39b FT |
495 | if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) { |
496 | dma_unmap_single(dev, | |
1da177e4 LT |
497 | adapter->rx_queue.queue_dma, |
498 | adapter->rx_queue.queue_len, | |
499 | DMA_BIDIRECTIONAL); | |
500 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
501 | } | |
502 | kfree(adapter->rx_queue.queue_addr); | |
503 | adapter->rx_queue.queue_addr = NULL; | |
504 | } | |
505 | ||
b6d35182 | 506 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 507 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 508 | ibmveth_free_buffer_pool(adapter, |
860f242e | 509 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
510 | |
511 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 512 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
513 | dma_unmap_single(&adapter->vdev->dev, |
514 | adapter->bounce_buffer_dma, | |
515 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
516 | DMA_BIDIRECTIONAL); | |
517 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
518 | } | |
519 | kfree(adapter->bounce_buffer); | |
520 | adapter->bounce_buffer = NULL; | |
521 | } | |
1da177e4 LT |
522 | } |
523 | ||
bbedefcc ME |
524 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
525 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
526 | { | |
527 | int rc, try_again = 1; | |
528 | ||
529 | /* After a kexec the adapter will still be open, so our attempt to | |
530 | * open it will fail. So if we get a failure we free the adapter and | |
531 | * try again, but only once. */ | |
532 | retry: | |
533 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
534 | adapter->buffer_list_dma, rxq_desc.desc, | |
535 | adapter->filter_list_dma, mac_address); | |
536 | ||
537 | if (rc != H_SUCCESS && try_again) { | |
538 | do { | |
539 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
540 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
541 | ||
542 | try_again = 0; | |
543 | goto retry; | |
544 | } | |
545 | ||
546 | return rc; | |
547 | } | |
548 | ||
1da177e4 LT |
549 | static int ibmveth_open(struct net_device *netdev) |
550 | { | |
4cf1653a | 551 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 552 | u64 mac_address = 0; |
b6d35182 | 553 | int rxq_entries = 1; |
1da177e4 LT |
554 | unsigned long lpar_rc; |
555 | int rc; | |
556 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 557 | int i; |
8d8bb39b | 558 | struct device *dev; |
1da177e4 LT |
559 | |
560 | ibmveth_debug_printk("open starting\n"); | |
561 | ||
bea3348e SH |
562 | napi_enable(&adapter->napi); |
563 | ||
b6d35182 SL |
564 | for(i = 0; i<IbmVethNumBufferPools; i++) |
565 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 566 | |
1da177e4 LT |
567 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
568 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 569 | |
1da177e4 LT |
570 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
571 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
572 | ibmveth_cleanup(adapter); | |
bea3348e | 573 | napi_disable(&adapter->napi); |
1da177e4 LT |
574 | return -ENOMEM; |
575 | } | |
576 | ||
577 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
578 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
579 | ||
580 | if(!adapter->rx_queue.queue_addr) { | |
581 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
582 | ibmveth_cleanup(adapter); | |
bea3348e | 583 | napi_disable(&adapter->napi); |
1da177e4 LT |
584 | return -ENOMEM; |
585 | } | |
586 | ||
8d8bb39b FT |
587 | dev = &adapter->vdev->dev; |
588 | ||
589 | adapter->buffer_list_dma = dma_map_single(dev, | |
1da177e4 | 590 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 591 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 592 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 593 | adapter->rx_queue.queue_dma = dma_map_single(dev, |
1da177e4 LT |
594 | adapter->rx_queue.queue_addr, |
595 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
596 | ||
8d8bb39b FT |
597 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
598 | (dma_mapping_error(dev, adapter->filter_list_dma)) || | |
599 | (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) { | |
1da177e4 LT |
600 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); |
601 | ibmveth_cleanup(adapter); | |
bea3348e | 602 | napi_disable(&adapter->napi); |
1da177e4 LT |
603 | return -ENOMEM; |
604 | } | |
605 | ||
606 | adapter->rx_queue.index = 0; | |
607 | adapter->rx_queue.num_slots = rxq_entries; | |
608 | adapter->rx_queue.toggle = 1; | |
609 | ||
1da177e4 LT |
610 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
611 | mac_address = mac_address >> 16; | |
612 | ||
79ef4a4d | 613 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; |
1da177e4 LT |
614 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
615 | ||
616 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
617 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
618 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
619 | ||
4347ef15 SL |
620 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
621 | ||
bbedefcc | 622 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 623 | |
706c8c93 | 624 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 625 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
a1c5a893 | 626 | ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n", |
1da177e4 LT |
627 | adapter->buffer_list_dma, |
628 | adapter->filter_list_dma, | |
629 | rxq_desc.desc, | |
630 | mac_address); | |
631 | ibmveth_cleanup(adapter); | |
bea3348e | 632 | napi_disable(&adapter->napi); |
d7fbeba6 | 633 | return -ENONET; |
1da177e4 LT |
634 | } |
635 | ||
860f242e SL |
636 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
637 | if(!adapter->rx_buff_pool[i].active) | |
638 | continue; | |
639 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
640 | ibmveth_error_printk("unable to alloc pool\n"); | |
641 | adapter->rx_buff_pool[i].active = 0; | |
642 | ibmveth_cleanup(adapter); | |
bea3348e | 643 | napi_disable(&adapter->napi); |
860f242e SL |
644 | return -ENOMEM ; |
645 | } | |
646 | } | |
647 | ||
1da177e4 | 648 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
a0607fd3 | 649 | if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { |
1da177e4 LT |
650 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); |
651 | do { | |
652 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 653 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
654 | |
655 | ibmveth_cleanup(adapter); | |
bea3348e | 656 | napi_disable(&adapter->napi); |
1da177e4 LT |
657 | return rc; |
658 | } | |
659 | ||
1096d63d RJ |
660 | adapter->bounce_buffer = |
661 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
662 | if (!adapter->bounce_buffer) { | |
663 | ibmveth_error_printk("unable to allocate bounce buffer\n"); | |
664 | ibmveth_cleanup(adapter); | |
665 | napi_disable(&adapter->napi); | |
666 | return -ENOMEM; | |
667 | } | |
668 | adapter->bounce_buffer_dma = | |
669 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
670 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 671 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
672 | ibmveth_error_printk("unable to map bounce buffer\n"); |
673 | ibmveth_cleanup(adapter); | |
674 | napi_disable(&adapter->napi); | |
675 | return -ENOMEM; | |
676 | } | |
677 | ||
e2adbcb4 | 678 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 679 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 680 | |
e2adbcb4 | 681 | netif_start_queue(netdev); |
1da177e4 LT |
682 | |
683 | ibmveth_debug_printk("open complete\n"); | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | static int ibmveth_close(struct net_device *netdev) | |
689 | { | |
4cf1653a | 690 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 691 | long lpar_rc; |
d7fbeba6 | 692 | |
1da177e4 LT |
693 | ibmveth_debug_printk("close starting\n"); |
694 | ||
bea3348e SH |
695 | napi_disable(&adapter->napi); |
696 | ||
860f242e SL |
697 | if (!adapter->pool_config) |
698 | netif_stop_queue(netdev); | |
1da177e4 | 699 | |
ee2e6114 | 700 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 701 | |
1da177e4 LT |
702 | do { |
703 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 704 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 705 | |
706c8c93 | 706 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
707 | { |
708 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
709 | lpar_rc); | |
710 | } | |
711 | ||
ee2e6114 RJ |
712 | free_irq(netdev->irq, netdev); |
713 | ||
1da177e4 LT |
714 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); |
715 | ||
716 | ibmveth_cleanup(adapter); | |
717 | ||
718 | ibmveth_debug_printk("close complete\n"); | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
724 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
725 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
726 | cmd->speed = SPEED_1000; | |
727 | cmd->duplex = DUPLEX_FULL; | |
728 | cmd->port = PORT_FIBRE; | |
729 | cmd->phy_address = 0; | |
730 | cmd->transceiver = XCVR_INTERNAL; | |
731 | cmd->autoneg = AUTONEG_ENABLE; | |
732 | cmd->maxtxpkt = 0; | |
733 | cmd->maxrxpkt = 1; | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
738 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
739 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
740 | } | |
741 | ||
742 | static u32 netdev_get_link(struct net_device *dev) { | |
743 | return 1; | |
744 | } | |
745 | ||
5fc7e01c BK |
746 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
747 | { | |
4cf1653a | 748 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
749 | |
750 | if (data) | |
751 | adapter->rx_csum = 1; | |
752 | else { | |
753 | /* | |
754 | * Since the ibmveth firmware interface does not have the concept of | |
755 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
756 | * we also have to disable tx checksum offload. Once we disable rx | |
757 | * checksum offload, we are no longer allowed to send tx buffers that | |
758 | * are not properly checksummed. | |
759 | */ | |
760 | adapter->rx_csum = 0; | |
761 | dev->features &= ~NETIF_F_IP_CSUM; | |
ab78df75 | 762 | dev->features &= ~NETIF_F_IPV6_CSUM; |
5fc7e01c BK |
763 | } |
764 | } | |
765 | ||
766 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
767 | { | |
4cf1653a | 768 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
769 | |
770 | if (data) { | |
ab78df75 SL |
771 | if (adapter->fw_ipv4_csum_support) |
772 | dev->features |= NETIF_F_IP_CSUM; | |
773 | if (adapter->fw_ipv6_csum_support) | |
774 | dev->features |= NETIF_F_IPV6_CSUM; | |
5fc7e01c | 775 | adapter->rx_csum = 1; |
ab78df75 | 776 | } else { |
5fc7e01c | 777 | dev->features &= ~NETIF_F_IP_CSUM; |
ab78df75 SL |
778 | dev->features &= ~NETIF_F_IPV6_CSUM; |
779 | } | |
5fc7e01c BK |
780 | } |
781 | ||
782 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
783 | void (*done) (struct net_device *, u32)) | |
784 | { | |
4cf1653a | 785 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 786 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 SL |
787 | unsigned long set_attr6, clr_attr6; |
788 | long ret, ret6; | |
5fc7e01c BK |
789 | int rc1 = 0, rc2 = 0; |
790 | int restart = 0; | |
791 | ||
792 | if (netif_running(dev)) { | |
793 | restart = 1; | |
794 | adapter->pool_config = 1; | |
795 | ibmveth_close(dev); | |
796 | adapter->pool_config = 0; | |
797 | } | |
798 | ||
79ef4a4d BK |
799 | set_attr = 0; |
800 | clr_attr = 0; | |
5fc7e01c | 801 | |
ab78df75 | 802 | if (data) { |
79ef4a4d | 803 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
804 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
805 | } else { | |
79ef4a4d | 806 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
807 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
808 | } | |
5fc7e01c | 809 | |
79ef4a4d | 810 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 811 | |
79ef4a4d BK |
812 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
813 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
814 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
815 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
816 | set_attr, &ret_attr); | |
5fc7e01c BK |
817 | |
818 | if (ret != H_SUCCESS) { | |
ab78df75 SL |
819 | ibmveth_error_printk("unable to change IPv4 checksum " |
820 | "offload settings. %d rc=%ld\n", | |
821 | data, ret); | |
5fc7e01c BK |
822 | |
823 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
79ef4a4d | 824 | set_attr, clr_attr, &ret_attr); |
5fc7e01c | 825 | } else |
ab78df75 SL |
826 | adapter->fw_ipv4_csum_support = data; |
827 | ||
828 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
829 | clr_attr6, set_attr6, &ret_attr); | |
830 | ||
831 | if (ret6 != H_SUCCESS) { | |
832 | ibmveth_error_printk("unable to change IPv6 checksum " | |
833 | "offload settings. %d rc=%ld\n", | |
834 | data, ret); | |
835 | ||
836 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
837 | set_attr6, clr_attr6, | |
838 | &ret_attr); | |
839 | } else | |
840 | adapter->fw_ipv6_csum_support = data; | |
841 | ||
842 | if (ret == H_SUCCESS || ret6 == H_SUCCESS) | |
5fc7e01c | 843 | done(dev, data); |
ab78df75 SL |
844 | else |
845 | rc1 = -EIO; | |
5fc7e01c BK |
846 | } else { |
847 | rc1 = -EIO; | |
848 | ibmveth_error_printk("unable to change checksum offload settings." | |
79ef4a4d | 849 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr); |
5fc7e01c BK |
850 | } |
851 | ||
852 | if (restart) | |
853 | rc2 = ibmveth_open(dev); | |
854 | ||
855 | return rc1 ? rc1 : rc2; | |
856 | } | |
857 | ||
858 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
859 | { | |
4cf1653a | 860 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
861 | |
862 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
863 | return 0; | |
864 | ||
865 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
866 | } | |
867 | ||
868 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
869 | { | |
4cf1653a | 870 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
871 | int rc = 0; |
872 | ||
ab78df75 | 873 | if (data && (dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
5fc7e01c | 874 | return 0; |
ab78df75 | 875 | if (!data && !(dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
5fc7e01c BK |
876 | return 0; |
877 | ||
878 | if (data && !adapter->rx_csum) | |
879 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
880 | else | |
881 | ibmveth_set_tx_csum_flags(dev, data); | |
882 | ||
883 | return rc; | |
884 | } | |
885 | ||
886 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
887 | { | |
4cf1653a | 888 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
889 | return adapter->rx_csum; |
890 | } | |
891 | ||
ddbb4de9 BK |
892 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
893 | { | |
894 | int i; | |
895 | ||
896 | if (stringset != ETH_SS_STATS) | |
897 | return; | |
898 | ||
899 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
900 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
901 | } | |
902 | ||
b9f2c044 | 903 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 904 | { |
b9f2c044 JG |
905 | switch (sset) { |
906 | case ETH_SS_STATS: | |
907 | return ARRAY_SIZE(ibmveth_stats); | |
908 | default: | |
909 | return -EOPNOTSUPP; | |
910 | } | |
ddbb4de9 BK |
911 | } |
912 | ||
913 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
914 | struct ethtool_stats *stats, u64 *data) | |
915 | { | |
916 | int i; | |
4cf1653a | 917 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
918 | |
919 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
920 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
921 | } | |
922 | ||
7282d491 | 923 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
924 | .get_drvinfo = netdev_get_drvinfo, |
925 | .get_settings = netdev_get_settings, | |
926 | .get_link = netdev_get_link, | |
5fc7e01c BK |
927 | .set_tx_csum = ibmveth_set_tx_csum, |
928 | .get_rx_csum = ibmveth_get_rx_csum, | |
929 | .set_rx_csum = ibmveth_set_rx_csum, | |
ddbb4de9 | 930 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 931 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 932 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
6e8ab30e | 933 | .set_sg = ethtool_op_set_sg, |
1da177e4 LT |
934 | }; |
935 | ||
936 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
937 | { | |
938 | return -EOPNOTSUPP; | |
939 | } | |
940 | ||
941 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
942 | ||
6e8ab30e SL |
943 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
944 | union ibmveth_buf_desc *descs) | |
1da177e4 | 945 | { |
1da177e4 LT |
946 | unsigned long correlator; |
947 | unsigned int retry_count; | |
6e8ab30e SL |
948 | unsigned long ret; |
949 | ||
950 | /* | |
951 | * The retry count sets a maximum for the number of broadcast and | |
952 | * multicast destinations within the system. | |
953 | */ | |
954 | retry_count = 1024; | |
955 | correlator = 0; | |
956 | do { | |
957 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
958 | descs[0].desc, descs[1].desc, | |
959 | descs[2].desc, descs[3].desc, | |
960 | descs[4].desc, descs[5].desc, | |
961 | correlator, &correlator); | |
962 | } while ((ret == H_BUSY) && (retry_count--)); | |
963 | ||
964 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
965 | ibmveth_error_printk("tx: h_send_logical_lan failed with " | |
966 | "rc=%ld\n", ret); | |
967 | return 1; | |
968 | } | |
969 | ||
970 | return 0; | |
971 | } | |
60296d9e | 972 | |
6e8ab30e SL |
973 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
974 | struct net_device *netdev) | |
975 | { | |
976 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
977 | unsigned int desc_flags; | |
978 | union ibmveth_buf_desc descs[6]; | |
979 | int last, i; | |
980 | int force_bounce = 0; | |
981 | ||
982 | /* | |
983 | * veth handles a maximum of 6 segments including the header, so | |
984 | * we have to linearize the skb if there are more than this. | |
985 | */ | |
986 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
987 | netdev->stats.tx_dropped++; | |
988 | goto out; | |
989 | } | |
1da177e4 | 990 | |
6e8ab30e | 991 | /* veth can't checksum offload UDP */ |
f4ff2872 | 992 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
993 | ((skb->protocol == htons(ETH_P_IP) && |
994 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
995 | (skb->protocol == htons(ETH_P_IPV6) && | |
996 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
997 | skb_checksum_help(skb)) { | |
998 | ||
f4ff2872 | 999 | ibmveth_error_printk("tx: failed to checksum packet\n"); |
6e8ab30e | 1000 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
1001 | goto out; |
1002 | } | |
1003 | ||
6e8ab30e SL |
1004 | desc_flags = IBMVETH_BUF_VALID; |
1005 | ||
f4ff2872 | 1006 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
1007 | unsigned char *buf = skb_transport_header(skb) + |
1008 | skb->csum_offset; | |
f4ff2872 | 1009 | |
6e8ab30e | 1010 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
1011 | |
1012 | /* Need to zero out the checksum */ | |
1013 | buf[0] = 0; | |
1014 | buf[1] = 0; | |
1015 | } | |
1016 | ||
6e8ab30e SL |
1017 | retry_bounce: |
1018 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 1019 | |
6e8ab30e SL |
1020 | /* |
1021 | * If a linear packet is below the rx threshold then | |
1022 | * copy it into the static bounce buffer. This avoids the | |
1023 | * cost of a TCE insert and remove. | |
1024 | */ | |
1025 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
1026 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
1027 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
1028 | skb->len); | |
1da177e4 | 1029 | |
6e8ab30e SL |
1030 | descs[0].fields.flags_len = desc_flags | skb->len; |
1031 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
1032 | ||
1033 | if (ibmveth_send(adapter, descs)) { | |
1034 | adapter->tx_send_failed++; | |
1035 | netdev->stats.tx_dropped++; | |
1036 | } else { | |
1037 | netdev->stats.tx_packets++; | |
1038 | netdev->stats.tx_bytes += skb->len; | |
1039 | } | |
1040 | ||
1041 | goto out; | |
1042 | } | |
1043 | ||
1044 | /* Map the header */ | |
1045 | descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
1046 | skb_headlen(skb), | |
1047 | DMA_TO_DEVICE); | |
1048 | if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address)) | |
1049 | goto map_failed; | |
1050 | ||
1051 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
1052 | ||
1053 | /* Map the frags */ | |
1054 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1055 | unsigned long dma_addr; | |
1056 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1057 | ||
1058 | dma_addr = dma_map_page(&adapter->vdev->dev, frag->page, | |
1059 | frag->page_offset, frag->size, | |
1060 | DMA_TO_DEVICE); | |
1061 | ||
1062 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1063 | goto map_failed_frags; | |
1064 | ||
1065 | descs[i+1].fields.flags_len = desc_flags | frag->size; | |
1066 | descs[i+1].fields.address = dma_addr; | |
1067 | } | |
1068 | ||
1069 | if (ibmveth_send(adapter, descs)) { | |
1070 | adapter->tx_send_failed++; | |
1071 | netdev->stats.tx_dropped++; | |
1da177e4 | 1072 | } else { |
6e8ab30e SL |
1073 | netdev->stats.tx_packets++; |
1074 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1075 | } |
1076 | ||
6e8ab30e SL |
1077 | for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) |
1078 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1079 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1080 | DMA_TO_DEVICE); | |
1da177e4 | 1081 | |
e8cb7eb4 | 1082 | out: |
1da177e4 | 1083 | dev_kfree_skb(skb); |
6ed10654 | 1084 | return NETDEV_TX_OK; |
6e8ab30e SL |
1085 | |
1086 | map_failed_frags: | |
1087 | last = i+1; | |
1088 | for (i = 0; i < last; i++) | |
1089 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1090 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1091 | DMA_TO_DEVICE); | |
1092 | ||
1093 | map_failed: | |
1094 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
1095 | ibmveth_error_printk("tx: unable to map xmit buffer\n"); | |
1096 | adapter->tx_map_failed++; | |
1097 | skb_linearize(skb); | |
1098 | force_bounce = 1; | |
1099 | goto retry_bounce; | |
1da177e4 LT |
1100 | } |
1101 | ||
bea3348e | 1102 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1103 | { |
bea3348e SH |
1104 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
1105 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 1106 | int frames_processed = 0; |
1da177e4 LT |
1107 | unsigned long lpar_rc; |
1108 | ||
1109 | restart_poll: | |
1110 | do { | |
bea3348e SH |
1111 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1112 | break; | |
1da177e4 | 1113 | |
f89e49e7 | 1114 | smp_rmb(); |
bea3348e SH |
1115 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1116 | wmb(); /* suggested by larson1 */ | |
1117 | adapter->rx_invalid_buffer++; | |
1118 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
1119 | ibmveth_rxq_recycle_buffer(adapter); | |
1120 | } else { | |
8d86c61a | 1121 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1122 | int length = ibmveth_rxq_frame_length(adapter); |
1123 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1124 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1125 | ||
bea3348e | 1126 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1127 | |
8d86c61a SL |
1128 | new_skb = NULL; |
1129 | if (length < rx_copybreak) | |
1130 | new_skb = netdev_alloc_skb(netdev, length); | |
1131 | ||
1132 | if (new_skb) { | |
1133 | skb_copy_to_linear_data(new_skb, | |
1134 | skb->data + offset, | |
1135 | length); | |
0c26b677 SL |
1136 | if (rx_flush) |
1137 | ibmveth_flush_buffer(skb->data, | |
1138 | length + offset); | |
8d86c61a SL |
1139 | skb = new_skb; |
1140 | ibmveth_rxq_recycle_buffer(adapter); | |
1141 | } else { | |
1142 | ibmveth_rxq_harvest_buffer(adapter); | |
1143 | skb_reserve(skb, offset); | |
1144 | } | |
1da177e4 | 1145 | |
bea3348e SH |
1146 | skb_put(skb, length); |
1147 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1148 | |
8d86c61a SL |
1149 | if (csum_good) |
1150 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1151 | ||
bea3348e | 1152 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1153 | |
09f75cd7 JG |
1154 | netdev->stats.rx_packets++; |
1155 | netdev->stats.rx_bytes += length; | |
bea3348e | 1156 | frames_processed++; |
1da177e4 | 1157 | } |
bea3348e | 1158 | } while (frames_processed < budget); |
1da177e4 | 1159 | |
e2adbcb4 | 1160 | ibmveth_replenish_task(adapter); |
1da177e4 | 1161 | |
bea3348e SH |
1162 | if (frames_processed < budget) { |
1163 | /* We think we are done - reenable interrupts, | |
1164 | * then check once more to make sure we are done. | |
1165 | */ | |
1166 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1167 | VIO_IRQ_ENABLE); | |
1da177e4 | 1168 | |
bea3348e | 1169 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 1170 | |
288379f0 | 1171 | napi_complete(napi); |
1da177e4 | 1172 | |
bea3348e | 1173 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1174 | napi_reschedule(napi)) { |
bea3348e SH |
1175 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1176 | VIO_IRQ_DISABLE); | |
1177 | goto restart_poll; | |
1178 | } | |
1da177e4 LT |
1179 | } |
1180 | ||
bea3348e | 1181 | return frames_processed; |
1da177e4 LT |
1182 | } |
1183 | ||
7d12e780 | 1184 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1185 | { |
1da177e4 | 1186 | struct net_device *netdev = dev_instance; |
4cf1653a | 1187 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1188 | unsigned long lpar_rc; |
1189 | ||
288379f0 | 1190 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1191 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1192 | VIO_IRQ_DISABLE); | |
706c8c93 | 1193 | ibmveth_assert(lpar_rc == H_SUCCESS); |
288379f0 | 1194 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1195 | } |
1196 | return IRQ_HANDLED; | |
1197 | } | |
1198 | ||
1da177e4 LT |
1199 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1200 | { | |
4cf1653a | 1201 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1202 | unsigned long lpar_rc; |
1203 | ||
4cd24eaf JP |
1204 | if ((netdev->flags & IFF_PROMISC) || |
1205 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1206 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1207 | IbmVethMcastEnableRecv | | |
1208 | IbmVethMcastDisableFiltering, | |
1209 | 0); | |
706c8c93 | 1210 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1211 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1212 | } | |
1213 | } else { | |
22bedad3 | 1214 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1215 | /* clear the filter table & disable filtering */ |
1216 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1217 | IbmVethMcastEnableRecv | | |
1218 | IbmVethMcastDisableFiltering | | |
1219 | IbmVethMcastClearFilterTable, | |
1220 | 0); | |
706c8c93 | 1221 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1222 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1223 | } | |
1224 | /* add the addresses to the filter table */ | |
22bedad3 | 1225 | netdev_for_each_mc_addr(ha, netdev) { |
1da177e4 LT |
1226 | // add the multicast address to the filter table |
1227 | unsigned long mcast_addr = 0; | |
22bedad3 | 1228 | memcpy(((char *)&mcast_addr)+2, ha->addr, 6); |
1da177e4 LT |
1229 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1230 | IbmVethMcastAddFilter, | |
1231 | mcast_addr); | |
706c8c93 | 1232 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1233 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1234 | } | |
1235 | } | |
d7fbeba6 | 1236 | |
1da177e4 LT |
1237 | /* re-enable filtering */ |
1238 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1239 | IbmVethMcastEnableFiltering, | |
1240 | 0); | |
706c8c93 | 1241 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1242 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1243 | } | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1248 | { | |
4cf1653a | 1249 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1250 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1251 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1252 | int i, rc; |
1253 | int need_restart = 0; | |
b6d35182 | 1254 | |
860f242e | 1255 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1256 | return -EINVAL; |
b6d35182 | 1257 | |
ce6eea58 BK |
1258 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1259 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1260 | break; | |
1261 | ||
1262 | if (i == IbmVethNumBufferPools) | |
1263 | return -EINVAL; | |
1264 | ||
ea866e65 SL |
1265 | /* Deactivate all the buffer pools so that the next loop can activate |
1266 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1267 | if (netif_running(adapter->netdev)) { |
1268 | need_restart = 1; | |
1269 | adapter->pool_config = 1; | |
1270 | ibmveth_close(adapter->netdev); | |
1271 | adapter->pool_config = 0; | |
1272 | } | |
ea866e65 | 1273 | |
860f242e | 1274 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1275 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ea866e65 | 1276 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1277 | |
860f242e | 1278 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1279 | dev->mtu = new_mtu; |
1280 | vio_cmo_set_dev_desired(viodev, | |
1281 | ibmveth_get_desired_dma | |
1282 | (viodev)); | |
0645bab7 RJ |
1283 | if (need_restart) { |
1284 | return ibmveth_open(adapter->netdev); | |
1285 | } | |
860f242e | 1286 | return 0; |
b6d35182 | 1287 | } |
b6d35182 | 1288 | } |
0645bab7 RJ |
1289 | |
1290 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1291 | return rc; | |
1292 | ||
860f242e | 1293 | return -EINVAL; |
1da177e4 LT |
1294 | } |
1295 | ||
6b422374 SL |
1296 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1297 | static void ibmveth_poll_controller(struct net_device *dev) | |
1298 | { | |
4cf1653a | 1299 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1300 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1301 | } |
1302 | #endif | |
1303 | ||
1096d63d RJ |
1304 | /** |
1305 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1306 | * | |
1307 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1308 | * | |
1309 | * Return value: | |
1310 | * Number of bytes of IO data the driver will need to perform well. | |
1311 | */ | |
1312 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1313 | { | |
1314 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1315 | struct ibmveth_adapter *adapter; | |
1316 | unsigned long ret; | |
1317 | int i; | |
1318 | int rxqentries = 1; | |
1319 | ||
1320 | /* netdev inits at probe time along with the structures we need below*/ | |
1321 | if (netdev == NULL) | |
1322 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1323 | ||
1324 | adapter = netdev_priv(netdev); | |
1325 | ||
1326 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1327 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1328 | ||
1329 | for (i = 0; i < IbmVethNumBufferPools; i++) { | |
1330 | /* add the size of the active receive buffers */ | |
1331 | if (adapter->rx_buff_pool[i].active) | |
1332 | ret += | |
1333 | adapter->rx_buff_pool[i].size * | |
1334 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1335 | buff_size); | |
1336 | rxqentries += adapter->rx_buff_pool[i].size; | |
1337 | } | |
1338 | /* add the size of the receive queue entries */ | |
1339 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1340 | ||
1341 | return ret; | |
1342 | } | |
1343 | ||
e186d174 AB |
1344 | static const struct net_device_ops ibmveth_netdev_ops = { |
1345 | .ndo_open = ibmveth_open, | |
1346 | .ndo_stop = ibmveth_close, | |
1347 | .ndo_start_xmit = ibmveth_start_xmit, | |
1348 | .ndo_set_multicast_list = ibmveth_set_multicast_list, | |
1349 | .ndo_do_ioctl = ibmveth_ioctl, | |
1350 | .ndo_change_mtu = ibmveth_change_mtu, | |
1351 | .ndo_validate_addr = eth_validate_addr, | |
1352 | .ndo_set_mac_address = eth_mac_addr, | |
1353 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1354 | .ndo_poll_controller = ibmveth_poll_controller, | |
1355 | #endif | |
1356 | }; | |
1357 | ||
1da177e4 LT |
1358 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1359 | { | |
b6d35182 | 1360 | int rc, i; |
1da177e4 | 1361 | struct net_device *netdev; |
9dc83afd | 1362 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1363 | |
1364 | unsigned char *mac_addr_p; | |
1365 | unsigned int *mcastFilterSize_p; | |
1366 | ||
1367 | ||
d7fbeba6 | 1368 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1369 | dev->unit_address); |
1370 | ||
493a684a ME |
1371 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1372 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1373 | if(!mac_addr_p) { |
1374 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1375 | "attribute\n", __FILE__, __LINE__); | |
1376 | return 0; | |
1377 | } | |
d7fbeba6 | 1378 | |
493a684a ME |
1379 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1380 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1381 | if(!mcastFilterSize_p) { |
1382 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1383 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1384 | __FILE__, __LINE__); | |
1385 | return 0; | |
1386 | } | |
d7fbeba6 | 1387 | |
1da177e4 LT |
1388 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1389 | ||
1390 | if(!netdev) | |
1391 | return -ENOMEM; | |
1392 | ||
4cf1653a | 1393 | adapter = netdev_priv(netdev); |
c7ae011d | 1394 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1395 | |
1396 | adapter->vdev = dev; | |
1397 | adapter->netdev = netdev; | |
1398 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1399 | adapter->pool_config = 0; |
d7fbeba6 | 1400 | |
bea3348e SH |
1401 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1402 | ||
1da177e4 | 1403 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1404 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1405 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1406 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1407 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1408 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1409 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1410 | ||
1411 | if ((*mac_addr_p & 0x3) != 0x02) | |
1412 | mac_addr_p += 2; | |
1413 | ||
1414 | adapter->mac_addr = 0; | |
1415 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
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); |
6e8ab30e | 1421 | netdev->features |= NETIF_F_SG; |
1da177e4 | 1422 | |
d44b5e07 | 1423 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1424 | |
860f242e SL |
1425 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1426 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
8dde2a96 GKH |
1427 | int error; |
1428 | ||
d7fbeba6 JG |
1429 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1430 | pool_count[i], pool_size[i], | |
860f242e | 1431 | pool_active[i]); |
8dde2a96 GKH |
1432 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1433 | &dev->dev.kobj, "pool%d", i); | |
1434 | if (!error) | |
1435 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1436 | } |
1da177e4 LT |
1437 | |
1438 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1439 | ||
1da177e4 LT |
1440 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1441 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1442 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1443 | ||
1da177e4 LT |
1444 | ibmveth_debug_printk("registering netdev...\n"); |
1445 | ||
bc4c6f54 | 1446 | ibmveth_set_csum_offload(netdev, 1, ibmveth_set_tx_csum_flags); |
f4ff2872 | 1447 | |
1da177e4 LT |
1448 | rc = register_netdev(netdev); |
1449 | ||
1450 | if(rc) { | |
1451 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1452 | free_netdev(netdev); | |
1453 | return rc; | |
1454 | } | |
1455 | ||
1456 | ibmveth_debug_printk("registered\n"); | |
1457 | ||
1da177e4 LT |
1458 | return 0; |
1459 | } | |
1460 | ||
1461 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1462 | { | |
c7ae011d | 1463 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1464 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1465 | int i; |
1466 | ||
1467 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
c10997f6 | 1468 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1469 | |
1470 | unregister_netdev(netdev); | |
1471 | ||
1da177e4 | 1472 | free_netdev(netdev); |
1096d63d RJ |
1473 | dev_set_drvdata(&dev->dev, NULL); |
1474 | ||
1da177e4 LT |
1475 | return 0; |
1476 | } | |
1477 | ||
860f242e SL |
1478 | static struct attribute veth_active_attr; |
1479 | static struct attribute veth_num_attr; | |
1480 | static struct attribute veth_size_attr; | |
1481 | ||
1482 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1483 | struct attribute * attr, char * buf) | |
1484 | { | |
d7fbeba6 | 1485 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1486 | struct ibmveth_buff_pool, |
1487 | kobj); | |
1488 | ||
1489 | if (attr == &veth_active_attr) | |
1490 | return sprintf(buf, "%d\n", pool->active); | |
1491 | else if (attr == &veth_num_attr) | |
1492 | return sprintf(buf, "%d\n", pool->size); | |
1493 | else if (attr == &veth_size_attr) | |
1494 | return sprintf(buf, "%d\n", pool->buff_size); | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1499 | const char * buf, size_t count) | |
1500 | { | |
d7fbeba6 | 1501 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1502 | struct ibmveth_buff_pool, |
1503 | kobj); | |
c7ae011d GKH |
1504 | struct net_device *netdev = dev_get_drvdata( |
1505 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1506 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1507 | long value = simple_strtol(buf, NULL, 10); |
1508 | long rc; | |
1509 | ||
1510 | if (attr == &veth_active_attr) { | |
1511 | if (value && !pool->active) { | |
4aa9c93e BK |
1512 | if (netif_running(netdev)) { |
1513 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1514 | ibmveth_error_printk("unable to alloc pool\n"); | |
1515 | return -ENOMEM; | |
1516 | } | |
1517 | pool->active = 1; | |
1518 | adapter->pool_config = 1; | |
1519 | ibmveth_close(netdev); | |
1520 | adapter->pool_config = 0; | |
1521 | if ((rc = ibmveth_open(netdev))) | |
1522 | return rc; | |
1523 | } else | |
1524 | pool->active = 1; | |
860f242e SL |
1525 | } else if (!value && pool->active) { |
1526 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1527 | int i; | |
1528 | /* Make sure there is a buffer pool with buffers that | |
1529 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1530 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1531 | if (pool == &adapter->rx_buff_pool[i]) |
1532 | continue; | |
1533 | if (!adapter->rx_buff_pool[i].active) | |
1534 | continue; | |
76b9cfcc BK |
1535 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1536 | break; | |
860f242e | 1537 | } |
76b9cfcc BK |
1538 | |
1539 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1540 | ibmveth_error_printk("no active pool >= MTU\n"); |
1541 | return -EPERM; | |
1542 | } | |
76b9cfcc | 1543 | |
76b9cfcc BK |
1544 | if (netif_running(netdev)) { |
1545 | adapter->pool_config = 1; | |
1546 | ibmveth_close(netdev); | |
ea866e65 | 1547 | pool->active = 0; |
76b9cfcc BK |
1548 | adapter->pool_config = 0; |
1549 | if ((rc = ibmveth_open(netdev))) | |
1550 | return rc; | |
1551 | } | |
ea866e65 | 1552 | pool->active = 0; |
860f242e SL |
1553 | } |
1554 | } else if (attr == &veth_num_attr) { | |
1555 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1556 | return -EINVAL; | |
1557 | else { | |
4aa9c93e BK |
1558 | if (netif_running(netdev)) { |
1559 | adapter->pool_config = 1; | |
1560 | ibmveth_close(netdev); | |
1561 | adapter->pool_config = 0; | |
1562 | pool->size = value; | |
1563 | if ((rc = ibmveth_open(netdev))) | |
1564 | return rc; | |
1565 | } else | |
1566 | pool->size = value; | |
860f242e SL |
1567 | } |
1568 | } else if (attr == &veth_size_attr) { | |
1569 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1570 | return -EINVAL; | |
1571 | else { | |
4aa9c93e BK |
1572 | if (netif_running(netdev)) { |
1573 | adapter->pool_config = 1; | |
1574 | ibmveth_close(netdev); | |
1575 | adapter->pool_config = 0; | |
1576 | pool->buff_size = value; | |
1577 | if ((rc = ibmveth_open(netdev))) | |
1578 | return rc; | |
1579 | } else | |
1580 | pool->buff_size = value; | |
860f242e SL |
1581 | } |
1582 | } | |
1583 | ||
1584 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1585 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1586 | return count; |
1587 | } | |
1588 | ||
1589 | ||
1590 | #define ATTR(_name, _mode) \ | |
1591 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1592 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1593 | }; |
1594 | ||
1595 | static ATTR(active, 0644); | |
1596 | static ATTR(num, 0644); | |
1597 | static ATTR(size, 0644); | |
1598 | ||
1599 | static struct attribute * veth_pool_attrs[] = { | |
1600 | &veth_active_attr, | |
1601 | &veth_num_attr, | |
1602 | &veth_size_attr, | |
1603 | NULL, | |
1604 | }; | |
1605 | ||
52cf25d0 | 1606 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1607 | .show = veth_pool_show, |
1608 | .store = veth_pool_store, | |
1609 | }; | |
1610 | ||
1611 | static struct kobj_type ktype_veth_pool = { | |
1612 | .release = NULL, | |
1613 | .sysfs_ops = &veth_pool_ops, | |
1614 | .default_attrs = veth_pool_attrs, | |
1615 | }; | |
1616 | ||
e7a3af5d BK |
1617 | static int ibmveth_resume(struct device *dev) |
1618 | { | |
1619 | struct net_device *netdev = dev_get_drvdata(dev); | |
1620 | ibmveth_interrupt(netdev->irq, netdev); | |
1621 | return 0; | |
1622 | } | |
860f242e | 1623 | |
1da177e4 LT |
1624 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1625 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1626 | { "", "" } |
1da177e4 | 1627 | }; |
1da177e4 LT |
1628 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1629 | ||
e7a3af5d BK |
1630 | static struct dev_pm_ops ibmveth_pm_ops = { |
1631 | .resume = ibmveth_resume | |
1632 | }; | |
1633 | ||
1da177e4 | 1634 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1635 | .id_table = ibmveth_device_table, |
1636 | .probe = ibmveth_probe, | |
1637 | .remove = ibmveth_remove, | |
1096d63d | 1638 | .get_desired_dma = ibmveth_get_desired_dma, |
6fdf5392 SR |
1639 | .driver = { |
1640 | .name = ibmveth_driver_name, | |
915124d8 | 1641 | .owner = THIS_MODULE, |
e7a3af5d | 1642 | .pm = &ibmveth_pm_ops, |
6fdf5392 | 1643 | } |
1da177e4 LT |
1644 | }; |
1645 | ||
1646 | static int __init ibmveth_module_init(void) | |
1647 | { | |
1648 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1649 | ||
1da177e4 LT |
1650 | return vio_register_driver(&ibmveth_driver); |
1651 | } | |
1652 | ||
1653 | static void __exit ibmveth_module_exit(void) | |
1654 | { | |
1655 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1656 | } |
1da177e4 LT |
1657 | |
1658 | module_init(ibmveth_module_init); | |
1659 | module_exit(ibmveth_module_exit); |