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 | ||
7d12e780 | 82 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 83 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 84 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
e295fe83 | 85 | |
860f242e | 86 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 87 | |
1096d63d | 88 | |
1da177e4 LT |
89 | static const char ibmveth_driver_name[] = "ibmveth"; |
90 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
91 | #define ibmveth_driver_version "1.03" | |
92 | ||
93 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
94 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
95 | MODULE_LICENSE("GPL"); | |
96 | MODULE_VERSION(ibmveth_driver_version); | |
97 | ||
c08cc3cc SL |
98 | static unsigned int tx_copybreak __read_mostly = 128; |
99 | module_param(tx_copybreak, uint, 0644); | |
100 | MODULE_PARM_DESC(tx_copybreak, | |
101 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
102 | ||
8d86c61a SL |
103 | static unsigned int rx_copybreak __read_mostly = 128; |
104 | module_param(rx_copybreak, uint, 0644); | |
105 | MODULE_PARM_DESC(rx_copybreak, | |
106 | "Maximum size of packet that is copied to a new buffer on receive"); | |
107 | ||
0c26b677 SL |
108 | static unsigned int rx_flush __read_mostly = 0; |
109 | module_param(rx_flush, uint, 0644); | |
110 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
111 | ||
ddbb4de9 BK |
112 | struct ibmveth_stat { |
113 | char name[ETH_GSTRING_LEN]; | |
114 | int offset; | |
115 | }; | |
116 | ||
117 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
118 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
119 | ||
120 | struct ibmveth_stat ibmveth_stats[] = { | |
121 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
122 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
123 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
124 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
125 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
126 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
127 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
128 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
129 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
130 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
ddbb4de9 BK |
131 | }; |
132 | ||
1da177e4 | 133 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
134 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
135 | { | |
136 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
137 | } | |
138 | ||
139 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
140 | { | |
141 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; | |
142 | } | |
143 | ||
1da177e4 LT |
144 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
145 | { | |
79ef4a4d | 146 | return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); |
1da177e4 LT |
147 | } |
148 | ||
149 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
150 | { | |
79ef4a4d | 151 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); |
1da177e4 LT |
152 | } |
153 | ||
154 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
155 | { | |
79ef4a4d | 156 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); |
1da177e4 LT |
157 | } |
158 | ||
159 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
160 | { | |
161 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
162 | } | |
163 | ||
f4ff2872 BK |
164 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
165 | { | |
79ef4a4d | 166 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); |
f4ff2872 BK |
167 | } |
168 | ||
1da177e4 | 169 | /* setup the initial settings for a buffer pool */ |
860f242e | 170 | 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 |
171 | { |
172 | pool->size = pool_size; | |
173 | pool->index = pool_index; | |
174 | pool->buff_size = buff_size; | |
c033a6d1 | 175 | pool->threshold = pool_size * 7 / 8; |
860f242e | 176 | pool->active = pool_active; |
1da177e4 LT |
177 | } |
178 | ||
179 | /* allocate and setup an buffer pool - called during open */ | |
180 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
181 | { | |
182 | int i; | |
183 | ||
d7fbeba6 | 184 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
185 | |
186 | if(!pool->free_map) { | |
187 | return -1; | |
188 | } | |
189 | ||
d7fbeba6 | 190 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
191 | if(!pool->dma_addr) { |
192 | kfree(pool->free_map); | |
193 | pool->free_map = NULL; | |
194 | return -1; | |
195 | } | |
196 | ||
a05abcb5 | 197 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
198 | |
199 | if(!pool->skbuff) { | |
200 | kfree(pool->dma_addr); | |
201 | pool->dma_addr = NULL; | |
202 | ||
203 | kfree(pool->free_map); | |
204 | pool->free_map = NULL; | |
205 | return -1; | |
206 | } | |
207 | ||
1da177e4 LT |
208 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
209 | ||
210 | for(i = 0; i < pool->size; ++i) { | |
211 | pool->free_map[i] = i; | |
212 | } | |
213 | ||
214 | atomic_set(&pool->available, 0); | |
215 | pool->producer_index = 0; | |
216 | pool->consumer_index = 0; | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
0c26b677 SL |
221 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
222 | { | |
223 | unsigned long offset; | |
224 | ||
225 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
226 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
227 | } | |
228 | ||
1da177e4 LT |
229 | /* replenish the buffers for a pool. note that we don't need to |
230 | * skb_reserve these since they are used for incoming... | |
231 | */ | |
232 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
233 | { | |
234 | u32 i; | |
235 | u32 count = pool->size - atomic_read(&pool->available); | |
236 | u32 buffers_added = 0; | |
1096d63d RJ |
237 | struct sk_buff *skb; |
238 | unsigned int free_index, index; | |
239 | u64 correlator; | |
240 | unsigned long lpar_rc; | |
241 | dma_addr_t dma_addr; | |
1da177e4 LT |
242 | |
243 | mb(); | |
244 | ||
245 | for(i = 0; i < count; ++i) { | |
1da177e4 | 246 | union ibmveth_buf_desc desc; |
1da177e4 | 247 | |
003212cc | 248 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 LT |
249 | |
250 | if(!skb) { | |
251 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
252 | adapter->replenish_no_mem++; | |
253 | break; | |
254 | } | |
255 | ||
047a66d4 | 256 | free_index = pool->consumer_index; |
a613f581 SL |
257 | pool->consumer_index++; |
258 | if (pool->consumer_index >= pool->size) | |
259 | pool->consumer_index = 0; | |
1da177e4 | 260 | index = pool->free_map[free_index]; |
d7fbeba6 | 261 | |
1da177e4 LT |
262 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
263 | ibmveth_assert(pool->skbuff[index] == NULL); | |
264 | ||
265 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
266 | pool->buff_size, DMA_FROM_DEVICE); | |
267 | ||
c713e7cb | 268 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
269 | goto failure; |
270 | ||
1da177e4 LT |
271 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
272 | pool->dma_addr[index] = dma_addr; | |
273 | pool->skbuff[index] = skb; | |
274 | ||
275 | correlator = ((u64)pool->index << 32) | index; | |
276 | *(u64*)skb->data = correlator; | |
277 | ||
79ef4a4d | 278 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 279 | desc.fields.address = dma_addr; |
1da177e4 | 280 | |
0c26b677 SL |
281 | if (rx_flush) { |
282 | unsigned int len = min(pool->buff_size, | |
283 | adapter->netdev->mtu + | |
284 | IBMVETH_BUFF_OH); | |
285 | ibmveth_flush_buffer(skb->data, len); | |
286 | } | |
1da177e4 | 287 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); |
d7fbeba6 | 288 | |
1096d63d RJ |
289 | if (lpar_rc != H_SUCCESS) |
290 | goto failure; | |
291 | else { | |
1da177e4 LT |
292 | buffers_added++; |
293 | adapter->replenish_add_buff_success++; | |
294 | } | |
295 | } | |
d7fbeba6 | 296 | |
1096d63d RJ |
297 | mb(); |
298 | atomic_add(buffers_added, &(pool->available)); | |
299 | return; | |
300 | ||
301 | failure: | |
302 | pool->free_map[free_index] = index; | |
303 | pool->skbuff[index] = NULL; | |
304 | if (pool->consumer_index == 0) | |
305 | pool->consumer_index = pool->size - 1; | |
306 | else | |
307 | pool->consumer_index--; | |
c713e7cb | 308 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
309 | dma_unmap_single(&adapter->vdev->dev, |
310 | pool->dma_addr[index], pool->buff_size, | |
311 | DMA_FROM_DEVICE); | |
312 | dev_kfree_skb_any(skb); | |
313 | adapter->replenish_add_buff_failure++; | |
314 | ||
1da177e4 LT |
315 | mb(); |
316 | atomic_add(buffers_added, &(pool->available)); | |
317 | } | |
318 | ||
e2adbcb4 | 319 | /* replenish routine */ |
d7fbeba6 | 320 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 321 | { |
b6d35182 SL |
322 | int i; |
323 | ||
1da177e4 LT |
324 | adapter->replenish_task_cycles++; |
325 | ||
c033a6d1 SL |
326 | for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) { |
327 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; | |
328 | ||
329 | if (pool->active && | |
330 | (atomic_read(&pool->available) < pool->threshold)) | |
331 | ibmveth_replenish_buffer_pool(adapter, pool); | |
332 | } | |
1da177e4 LT |
333 | |
334 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
335 | } |
336 | ||
337 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
338 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
339 | { | |
340 | int i; | |
341 | ||
b4558ea9 JJ |
342 | kfree(pool->free_map); |
343 | pool->free_map = NULL; | |
1da177e4 LT |
344 | |
345 | if(pool->skbuff && pool->dma_addr) { | |
346 | for(i = 0; i < pool->size; ++i) { | |
347 | struct sk_buff *skb = pool->skbuff[i]; | |
348 | if(skb) { | |
349 | dma_unmap_single(&adapter->vdev->dev, | |
350 | pool->dma_addr[i], | |
351 | pool->buff_size, | |
352 | DMA_FROM_DEVICE); | |
353 | dev_kfree_skb_any(skb); | |
354 | pool->skbuff[i] = NULL; | |
355 | } | |
356 | } | |
357 | } | |
358 | ||
359 | if(pool->dma_addr) { | |
360 | kfree(pool->dma_addr); | |
361 | pool->dma_addr = NULL; | |
362 | } | |
363 | ||
364 | if(pool->skbuff) { | |
365 | kfree(pool->skbuff); | |
366 | pool->skbuff = NULL; | |
367 | } | |
368 | } | |
369 | ||
370 | /* remove a buffer from a pool */ | |
371 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
372 | { | |
373 | unsigned int pool = correlator >> 32; | |
374 | unsigned int index = correlator & 0xffffffffUL; | |
375 | unsigned int free_index; | |
376 | struct sk_buff *skb; | |
377 | ||
378 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
379 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
380 | ||
381 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
382 | ||
383 | ibmveth_assert(skb != NULL); | |
384 | ||
385 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
386 | ||
387 | dma_unmap_single(&adapter->vdev->dev, | |
388 | adapter->rx_buff_pool[pool].dma_addr[index], | |
389 | adapter->rx_buff_pool[pool].buff_size, | |
390 | DMA_FROM_DEVICE); | |
391 | ||
047a66d4 | 392 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
393 | adapter->rx_buff_pool[pool].producer_index++; |
394 | if (adapter->rx_buff_pool[pool].producer_index >= | |
395 | adapter->rx_buff_pool[pool].size) | |
396 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
397 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
398 | ||
399 | mb(); | |
400 | ||
401 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
402 | } | |
403 | ||
404 | /* get the current buffer on the rx queue */ | |
405 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
406 | { | |
407 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
408 | unsigned int pool = correlator >> 32; | |
409 | unsigned int index = correlator & 0xffffffffUL; | |
410 | ||
411 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
412 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
413 | ||
414 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
415 | } | |
416 | ||
417 | /* recycle the current buffer on the rx queue */ | |
418 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
419 | { | |
420 | u32 q_index = adapter->rx_queue.index; | |
421 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
422 | unsigned int pool = correlator >> 32; | |
423 | unsigned int index = correlator & 0xffffffffUL; | |
424 | union ibmveth_buf_desc desc; | |
425 | unsigned long lpar_rc; | |
426 | ||
427 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
428 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
429 | ||
b6d35182 SL |
430 | if(!adapter->rx_buff_pool[pool].active) { |
431 | ibmveth_rxq_harvest_buffer(adapter); | |
432 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
433 | return; | |
434 | } | |
435 | ||
79ef4a4d BK |
436 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
437 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
438 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
439 | ||
440 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 441 | |
706c8c93 | 442 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
443 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
444 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
445 | } | |
446 | ||
447 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
448 | adapter->rx_queue.index = 0; | |
449 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
450 | } | |
451 | } | |
452 | ||
493a684a | 453 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
454 | { |
455 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
456 | ||
457 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
458 | adapter->rx_queue.index = 0; | |
459 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
460 | } | |
461 | } | |
462 | ||
463 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
464 | { | |
b6d35182 | 465 | int i; |
8d8bb39b | 466 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 467 | |
1da177e4 | 468 | if(adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
469 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
470 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
471 | DMA_BIDIRECTIONAL); |
472 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
473 | } | |
474 | free_page((unsigned long)adapter->buffer_list_addr); | |
475 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 476 | } |
1da177e4 LT |
477 | |
478 | if(adapter->filter_list_addr != NULL) { | |
8d8bb39b FT |
479 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
480 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
481 | DMA_BIDIRECTIONAL); |
482 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
483 | } | |
484 | free_page((unsigned long)adapter->filter_list_addr); | |
485 | adapter->filter_list_addr = NULL; | |
486 | } | |
487 | ||
488 | if(adapter->rx_queue.queue_addr != NULL) { | |
8d8bb39b FT |
489 | if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) { |
490 | dma_unmap_single(dev, | |
1da177e4 LT |
491 | adapter->rx_queue.queue_dma, |
492 | adapter->rx_queue.queue_len, | |
493 | DMA_BIDIRECTIONAL); | |
494 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
495 | } | |
496 | kfree(adapter->rx_queue.queue_addr); | |
497 | adapter->rx_queue.queue_addr = NULL; | |
498 | } | |
499 | ||
b6d35182 | 500 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 501 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 502 | ibmveth_free_buffer_pool(adapter, |
860f242e | 503 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
504 | |
505 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 506 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
507 | dma_unmap_single(&adapter->vdev->dev, |
508 | adapter->bounce_buffer_dma, | |
509 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
510 | DMA_BIDIRECTIONAL); | |
511 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
512 | } | |
513 | kfree(adapter->bounce_buffer); | |
514 | adapter->bounce_buffer = NULL; | |
515 | } | |
1da177e4 LT |
516 | } |
517 | ||
bbedefcc ME |
518 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
519 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
520 | { | |
521 | int rc, try_again = 1; | |
522 | ||
523 | /* After a kexec the adapter will still be open, so our attempt to | |
524 | * open it will fail. So if we get a failure we free the adapter and | |
525 | * try again, but only once. */ | |
526 | retry: | |
527 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
528 | adapter->buffer_list_dma, rxq_desc.desc, | |
529 | adapter->filter_list_dma, mac_address); | |
530 | ||
531 | if (rc != H_SUCCESS && try_again) { | |
532 | do { | |
533 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
534 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
535 | ||
536 | try_again = 0; | |
537 | goto retry; | |
538 | } | |
539 | ||
540 | return rc; | |
541 | } | |
542 | ||
1da177e4 LT |
543 | static int ibmveth_open(struct net_device *netdev) |
544 | { | |
4cf1653a | 545 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 546 | u64 mac_address = 0; |
b6d35182 | 547 | int rxq_entries = 1; |
1da177e4 LT |
548 | unsigned long lpar_rc; |
549 | int rc; | |
550 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 551 | int i; |
8d8bb39b | 552 | struct device *dev; |
1da177e4 LT |
553 | |
554 | ibmveth_debug_printk("open starting\n"); | |
555 | ||
bea3348e SH |
556 | napi_enable(&adapter->napi); |
557 | ||
b6d35182 SL |
558 | for(i = 0; i<IbmVethNumBufferPools; i++) |
559 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 560 | |
1da177e4 LT |
561 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
562 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 563 | |
1da177e4 LT |
564 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
565 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
566 | ibmveth_cleanup(adapter); | |
bea3348e | 567 | napi_disable(&adapter->napi); |
1da177e4 LT |
568 | return -ENOMEM; |
569 | } | |
570 | ||
571 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
572 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
573 | ||
574 | if(!adapter->rx_queue.queue_addr) { | |
575 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
576 | ibmveth_cleanup(adapter); | |
bea3348e | 577 | napi_disable(&adapter->napi); |
1da177e4 LT |
578 | return -ENOMEM; |
579 | } | |
580 | ||
8d8bb39b FT |
581 | dev = &adapter->vdev->dev; |
582 | ||
583 | adapter->buffer_list_dma = dma_map_single(dev, | |
1da177e4 | 584 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 585 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 586 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 587 | adapter->rx_queue.queue_dma = dma_map_single(dev, |
1da177e4 LT |
588 | adapter->rx_queue.queue_addr, |
589 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
590 | ||
8d8bb39b FT |
591 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
592 | (dma_mapping_error(dev, adapter->filter_list_dma)) || | |
593 | (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) { | |
1da177e4 LT |
594 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); |
595 | ibmveth_cleanup(adapter); | |
bea3348e | 596 | napi_disable(&adapter->napi); |
1da177e4 LT |
597 | return -ENOMEM; |
598 | } | |
599 | ||
600 | adapter->rx_queue.index = 0; | |
601 | adapter->rx_queue.num_slots = rxq_entries; | |
602 | adapter->rx_queue.toggle = 1; | |
603 | ||
1da177e4 LT |
604 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
605 | mac_address = mac_address >> 16; | |
606 | ||
79ef4a4d | 607 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; |
1da177e4 LT |
608 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
609 | ||
610 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
611 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
612 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
613 | ||
4347ef15 SL |
614 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
615 | ||
bbedefcc | 616 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 617 | |
706c8c93 | 618 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 619 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
a1c5a893 | 620 | ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n", |
1da177e4 LT |
621 | adapter->buffer_list_dma, |
622 | adapter->filter_list_dma, | |
623 | rxq_desc.desc, | |
624 | mac_address); | |
625 | ibmveth_cleanup(adapter); | |
bea3348e | 626 | napi_disable(&adapter->napi); |
d7fbeba6 | 627 | return -ENONET; |
1da177e4 LT |
628 | } |
629 | ||
860f242e SL |
630 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
631 | if(!adapter->rx_buff_pool[i].active) | |
632 | continue; | |
633 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
634 | ibmveth_error_printk("unable to alloc pool\n"); | |
635 | adapter->rx_buff_pool[i].active = 0; | |
636 | ibmveth_cleanup(adapter); | |
bea3348e | 637 | napi_disable(&adapter->napi); |
860f242e SL |
638 | return -ENOMEM ; |
639 | } | |
640 | } | |
641 | ||
1da177e4 | 642 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
a0607fd3 | 643 | if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { |
1da177e4 LT |
644 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); |
645 | do { | |
646 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 647 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
648 | |
649 | ibmveth_cleanup(adapter); | |
bea3348e | 650 | napi_disable(&adapter->napi); |
1da177e4 LT |
651 | return rc; |
652 | } | |
653 | ||
1096d63d RJ |
654 | adapter->bounce_buffer = |
655 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
656 | if (!adapter->bounce_buffer) { | |
657 | ibmveth_error_printk("unable to allocate bounce buffer\n"); | |
658 | ibmveth_cleanup(adapter); | |
659 | napi_disable(&adapter->napi); | |
660 | return -ENOMEM; | |
661 | } | |
662 | adapter->bounce_buffer_dma = | |
663 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
664 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 665 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
666 | ibmveth_error_printk("unable to map bounce buffer\n"); |
667 | ibmveth_cleanup(adapter); | |
668 | napi_disable(&adapter->napi); | |
669 | return -ENOMEM; | |
670 | } | |
671 | ||
e2adbcb4 | 672 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 673 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 674 | |
e2adbcb4 | 675 | netif_start_queue(netdev); |
1da177e4 LT |
676 | |
677 | ibmveth_debug_printk("open complete\n"); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
682 | static int ibmveth_close(struct net_device *netdev) | |
683 | { | |
4cf1653a | 684 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 685 | long lpar_rc; |
d7fbeba6 | 686 | |
1da177e4 LT |
687 | ibmveth_debug_printk("close starting\n"); |
688 | ||
bea3348e SH |
689 | napi_disable(&adapter->napi); |
690 | ||
860f242e SL |
691 | if (!adapter->pool_config) |
692 | netif_stop_queue(netdev); | |
1da177e4 | 693 | |
ee2e6114 | 694 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 695 | |
1da177e4 LT |
696 | do { |
697 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 698 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 699 | |
706c8c93 | 700 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
701 | { |
702 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
703 | lpar_rc); | |
704 | } | |
705 | ||
ee2e6114 RJ |
706 | free_irq(netdev->irq, netdev); |
707 | ||
1da177e4 LT |
708 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); |
709 | ||
710 | ibmveth_cleanup(adapter); | |
711 | ||
712 | ibmveth_debug_printk("close complete\n"); | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
718 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
719 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
720 | cmd->speed = SPEED_1000; | |
721 | cmd->duplex = DUPLEX_FULL; | |
722 | cmd->port = PORT_FIBRE; | |
723 | cmd->phy_address = 0; | |
724 | cmd->transceiver = XCVR_INTERNAL; | |
725 | cmd->autoneg = AUTONEG_ENABLE; | |
726 | cmd->maxtxpkt = 0; | |
727 | cmd->maxrxpkt = 1; | |
728 | return 0; | |
729 | } | |
730 | ||
731 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
732 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
733 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
734 | } | |
735 | ||
736 | static u32 netdev_get_link(struct net_device *dev) { | |
737 | return 1; | |
738 | } | |
739 | ||
5fc7e01c BK |
740 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
741 | { | |
4cf1653a | 742 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
743 | |
744 | if (data) | |
745 | adapter->rx_csum = 1; | |
746 | else { | |
747 | /* | |
748 | * Since the ibmveth firmware interface does not have the concept of | |
749 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
750 | * we also have to disable tx checksum offload. Once we disable rx | |
751 | * checksum offload, we are no longer allowed to send tx buffers that | |
752 | * are not properly checksummed. | |
753 | */ | |
754 | adapter->rx_csum = 0; | |
755 | dev->features &= ~NETIF_F_IP_CSUM; | |
ab78df75 | 756 | dev->features &= ~NETIF_F_IPV6_CSUM; |
5fc7e01c BK |
757 | } |
758 | } | |
759 | ||
760 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
761 | { | |
4cf1653a | 762 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
763 | |
764 | if (data) { | |
ab78df75 SL |
765 | if (adapter->fw_ipv4_csum_support) |
766 | dev->features |= NETIF_F_IP_CSUM; | |
767 | if (adapter->fw_ipv6_csum_support) | |
768 | dev->features |= NETIF_F_IPV6_CSUM; | |
5fc7e01c | 769 | adapter->rx_csum = 1; |
ab78df75 | 770 | } else { |
5fc7e01c | 771 | dev->features &= ~NETIF_F_IP_CSUM; |
ab78df75 SL |
772 | dev->features &= ~NETIF_F_IPV6_CSUM; |
773 | } | |
5fc7e01c BK |
774 | } |
775 | ||
776 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
777 | void (*done) (struct net_device *, u32)) | |
778 | { | |
4cf1653a | 779 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 780 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 SL |
781 | unsigned long set_attr6, clr_attr6; |
782 | long ret, ret6; | |
5fc7e01c BK |
783 | int rc1 = 0, rc2 = 0; |
784 | int restart = 0; | |
785 | ||
786 | if (netif_running(dev)) { | |
787 | restart = 1; | |
788 | adapter->pool_config = 1; | |
789 | ibmveth_close(dev); | |
790 | adapter->pool_config = 0; | |
791 | } | |
792 | ||
79ef4a4d BK |
793 | set_attr = 0; |
794 | clr_attr = 0; | |
5fc7e01c | 795 | |
ab78df75 | 796 | if (data) { |
79ef4a4d | 797 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
798 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
799 | } else { | |
79ef4a4d | 800 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
801 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
802 | } | |
5fc7e01c | 803 | |
79ef4a4d | 804 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 805 | |
79ef4a4d BK |
806 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
807 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
808 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
809 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
810 | set_attr, &ret_attr); | |
5fc7e01c BK |
811 | |
812 | if (ret != H_SUCCESS) { | |
ab78df75 SL |
813 | ibmveth_error_printk("unable to change IPv4 checksum " |
814 | "offload settings. %d rc=%ld\n", | |
815 | data, ret); | |
5fc7e01c BK |
816 | |
817 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
79ef4a4d | 818 | set_attr, clr_attr, &ret_attr); |
5fc7e01c | 819 | } else |
ab78df75 SL |
820 | adapter->fw_ipv4_csum_support = data; |
821 | ||
822 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
823 | clr_attr6, set_attr6, &ret_attr); | |
824 | ||
825 | if (ret6 != H_SUCCESS) { | |
826 | ibmveth_error_printk("unable to change IPv6 checksum " | |
827 | "offload settings. %d rc=%ld\n", | |
828 | data, ret); | |
829 | ||
830 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
831 | set_attr6, clr_attr6, | |
832 | &ret_attr); | |
833 | } else | |
834 | adapter->fw_ipv6_csum_support = data; | |
835 | ||
836 | if (ret == H_SUCCESS || ret6 == H_SUCCESS) | |
5fc7e01c | 837 | done(dev, data); |
ab78df75 SL |
838 | else |
839 | rc1 = -EIO; | |
5fc7e01c BK |
840 | } else { |
841 | rc1 = -EIO; | |
842 | ibmveth_error_printk("unable to change checksum offload settings." | |
79ef4a4d | 843 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr); |
5fc7e01c BK |
844 | } |
845 | ||
846 | if (restart) | |
847 | rc2 = ibmveth_open(dev); | |
848 | ||
849 | return rc1 ? rc1 : rc2; | |
850 | } | |
851 | ||
852 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
853 | { | |
4cf1653a | 854 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
855 | |
856 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
857 | return 0; | |
858 | ||
859 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
860 | } | |
861 | ||
862 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
863 | { | |
4cf1653a | 864 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
865 | int rc = 0; |
866 | ||
ab78df75 | 867 | if (data && (dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
5fc7e01c | 868 | return 0; |
ab78df75 | 869 | if (!data && !(dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
5fc7e01c BK |
870 | return 0; |
871 | ||
872 | if (data && !adapter->rx_csum) | |
873 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
874 | else | |
875 | ibmveth_set_tx_csum_flags(dev, data); | |
876 | ||
877 | return rc; | |
878 | } | |
879 | ||
880 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
881 | { | |
4cf1653a | 882 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
883 | return adapter->rx_csum; |
884 | } | |
885 | ||
ddbb4de9 BK |
886 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
887 | { | |
888 | int i; | |
889 | ||
890 | if (stringset != ETH_SS_STATS) | |
891 | return; | |
892 | ||
893 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
894 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
895 | } | |
896 | ||
b9f2c044 | 897 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 898 | { |
b9f2c044 JG |
899 | switch (sset) { |
900 | case ETH_SS_STATS: | |
901 | return ARRAY_SIZE(ibmveth_stats); | |
902 | default: | |
903 | return -EOPNOTSUPP; | |
904 | } | |
ddbb4de9 BK |
905 | } |
906 | ||
907 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
908 | struct ethtool_stats *stats, u64 *data) | |
909 | { | |
910 | int i; | |
4cf1653a | 911 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
912 | |
913 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
914 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
915 | } | |
916 | ||
7282d491 | 917 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
918 | .get_drvinfo = netdev_get_drvinfo, |
919 | .get_settings = netdev_get_settings, | |
920 | .get_link = netdev_get_link, | |
5fc7e01c BK |
921 | .set_tx_csum = ibmveth_set_tx_csum, |
922 | .get_rx_csum = ibmveth_get_rx_csum, | |
923 | .set_rx_csum = ibmveth_set_rx_csum, | |
ddbb4de9 | 924 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 925 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 926 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
6e8ab30e | 927 | .set_sg = ethtool_op_set_sg, |
1da177e4 LT |
928 | }; |
929 | ||
930 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
931 | { | |
932 | return -EOPNOTSUPP; | |
933 | } | |
934 | ||
935 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
936 | ||
6e8ab30e SL |
937 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
938 | union ibmveth_buf_desc *descs) | |
1da177e4 | 939 | { |
1da177e4 LT |
940 | unsigned long correlator; |
941 | unsigned int retry_count; | |
6e8ab30e SL |
942 | unsigned long ret; |
943 | ||
944 | /* | |
945 | * The retry count sets a maximum for the number of broadcast and | |
946 | * multicast destinations within the system. | |
947 | */ | |
948 | retry_count = 1024; | |
949 | correlator = 0; | |
950 | do { | |
951 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
952 | descs[0].desc, descs[1].desc, | |
953 | descs[2].desc, descs[3].desc, | |
954 | descs[4].desc, descs[5].desc, | |
955 | correlator, &correlator); | |
956 | } while ((ret == H_BUSY) && (retry_count--)); | |
957 | ||
958 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
959 | ibmveth_error_printk("tx: h_send_logical_lan failed with " | |
960 | "rc=%ld\n", ret); | |
961 | return 1; | |
962 | } | |
963 | ||
964 | return 0; | |
965 | } | |
60296d9e | 966 | |
6e8ab30e SL |
967 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
968 | struct net_device *netdev) | |
969 | { | |
970 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
971 | unsigned int desc_flags; | |
972 | union ibmveth_buf_desc descs[6]; | |
973 | int last, i; | |
974 | int force_bounce = 0; | |
975 | ||
976 | /* | |
977 | * veth handles a maximum of 6 segments including the header, so | |
978 | * we have to linearize the skb if there are more than this. | |
979 | */ | |
980 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
981 | netdev->stats.tx_dropped++; | |
982 | goto out; | |
983 | } | |
1da177e4 | 984 | |
6e8ab30e | 985 | /* veth can't checksum offload UDP */ |
f4ff2872 | 986 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
987 | ((skb->protocol == htons(ETH_P_IP) && |
988 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
989 | (skb->protocol == htons(ETH_P_IPV6) && | |
990 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
991 | skb_checksum_help(skb)) { | |
992 | ||
f4ff2872 | 993 | ibmveth_error_printk("tx: failed to checksum packet\n"); |
6e8ab30e | 994 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
995 | goto out; |
996 | } | |
997 | ||
6e8ab30e SL |
998 | desc_flags = IBMVETH_BUF_VALID; |
999 | ||
f4ff2872 | 1000 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
1001 | unsigned char *buf = skb_transport_header(skb) + |
1002 | skb->csum_offset; | |
f4ff2872 | 1003 | |
6e8ab30e | 1004 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
1005 | |
1006 | /* Need to zero out the checksum */ | |
1007 | buf[0] = 0; | |
1008 | buf[1] = 0; | |
1009 | } | |
1010 | ||
6e8ab30e SL |
1011 | retry_bounce: |
1012 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 1013 | |
6e8ab30e SL |
1014 | /* |
1015 | * If a linear packet is below the rx threshold then | |
1016 | * copy it into the static bounce buffer. This avoids the | |
1017 | * cost of a TCE insert and remove. | |
1018 | */ | |
1019 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
1020 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
1021 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
1022 | skb->len); | |
1da177e4 | 1023 | |
6e8ab30e SL |
1024 | descs[0].fields.flags_len = desc_flags | skb->len; |
1025 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
1026 | ||
1027 | if (ibmveth_send(adapter, descs)) { | |
1028 | adapter->tx_send_failed++; | |
1029 | netdev->stats.tx_dropped++; | |
1030 | } else { | |
1031 | netdev->stats.tx_packets++; | |
1032 | netdev->stats.tx_bytes += skb->len; | |
1033 | } | |
1034 | ||
1035 | goto out; | |
1036 | } | |
1037 | ||
1038 | /* Map the header */ | |
1039 | descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
1040 | skb_headlen(skb), | |
1041 | DMA_TO_DEVICE); | |
1042 | if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address)) | |
1043 | goto map_failed; | |
1044 | ||
1045 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
1046 | ||
1047 | /* Map the frags */ | |
1048 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1049 | unsigned long dma_addr; | |
1050 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1051 | ||
1052 | dma_addr = dma_map_page(&adapter->vdev->dev, frag->page, | |
1053 | frag->page_offset, frag->size, | |
1054 | DMA_TO_DEVICE); | |
1055 | ||
1056 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1057 | goto map_failed_frags; | |
1058 | ||
1059 | descs[i+1].fields.flags_len = desc_flags | frag->size; | |
1060 | descs[i+1].fields.address = dma_addr; | |
1061 | } | |
1062 | ||
1063 | if (ibmveth_send(adapter, descs)) { | |
1064 | adapter->tx_send_failed++; | |
1065 | netdev->stats.tx_dropped++; | |
1da177e4 | 1066 | } else { |
6e8ab30e SL |
1067 | netdev->stats.tx_packets++; |
1068 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1069 | } |
1070 | ||
6e8ab30e SL |
1071 | for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) |
1072 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1073 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1074 | DMA_TO_DEVICE); | |
1da177e4 | 1075 | |
e8cb7eb4 | 1076 | out: |
1da177e4 | 1077 | dev_kfree_skb(skb); |
6ed10654 | 1078 | return NETDEV_TX_OK; |
6e8ab30e SL |
1079 | |
1080 | map_failed_frags: | |
1081 | last = i+1; | |
1082 | for (i = 0; i < last; i++) | |
1083 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1084 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1085 | DMA_TO_DEVICE); | |
1086 | ||
1087 | map_failed: | |
1088 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
1089 | ibmveth_error_printk("tx: unable to map xmit buffer\n"); | |
1090 | adapter->tx_map_failed++; | |
1091 | skb_linearize(skb); | |
1092 | force_bounce = 1; | |
1093 | goto retry_bounce; | |
1da177e4 LT |
1094 | } |
1095 | ||
bea3348e | 1096 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1097 | { |
bea3348e SH |
1098 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
1099 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 1100 | int frames_processed = 0; |
1da177e4 LT |
1101 | unsigned long lpar_rc; |
1102 | ||
1103 | restart_poll: | |
1104 | do { | |
bea3348e SH |
1105 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1106 | break; | |
1da177e4 | 1107 | |
f89e49e7 | 1108 | smp_rmb(); |
bea3348e SH |
1109 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1110 | wmb(); /* suggested by larson1 */ | |
1111 | adapter->rx_invalid_buffer++; | |
1112 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
1113 | ibmveth_rxq_recycle_buffer(adapter); | |
1114 | } else { | |
8d86c61a | 1115 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1116 | int length = ibmveth_rxq_frame_length(adapter); |
1117 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1118 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1119 | ||
bea3348e | 1120 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1121 | |
8d86c61a SL |
1122 | new_skb = NULL; |
1123 | if (length < rx_copybreak) | |
1124 | new_skb = netdev_alloc_skb(netdev, length); | |
1125 | ||
1126 | if (new_skb) { | |
1127 | skb_copy_to_linear_data(new_skb, | |
1128 | skb->data + offset, | |
1129 | length); | |
0c26b677 SL |
1130 | if (rx_flush) |
1131 | ibmveth_flush_buffer(skb->data, | |
1132 | length + offset); | |
8d86c61a SL |
1133 | skb = new_skb; |
1134 | ibmveth_rxq_recycle_buffer(adapter); | |
1135 | } else { | |
1136 | ibmveth_rxq_harvest_buffer(adapter); | |
1137 | skb_reserve(skb, offset); | |
1138 | } | |
1da177e4 | 1139 | |
bea3348e SH |
1140 | skb_put(skb, length); |
1141 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1142 | |
8d86c61a SL |
1143 | if (csum_good) |
1144 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1145 | ||
bea3348e | 1146 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1147 | |
09f75cd7 JG |
1148 | netdev->stats.rx_packets++; |
1149 | netdev->stats.rx_bytes += length; | |
bea3348e | 1150 | frames_processed++; |
1da177e4 | 1151 | } |
bea3348e | 1152 | } while (frames_processed < budget); |
1da177e4 | 1153 | |
e2adbcb4 | 1154 | ibmveth_replenish_task(adapter); |
1da177e4 | 1155 | |
bea3348e SH |
1156 | if (frames_processed < budget) { |
1157 | /* We think we are done - reenable interrupts, | |
1158 | * then check once more to make sure we are done. | |
1159 | */ | |
1160 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1161 | VIO_IRQ_ENABLE); | |
1da177e4 | 1162 | |
bea3348e | 1163 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 1164 | |
288379f0 | 1165 | napi_complete(napi); |
1da177e4 | 1166 | |
bea3348e | 1167 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1168 | napi_reschedule(napi)) { |
bea3348e SH |
1169 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1170 | VIO_IRQ_DISABLE); | |
1171 | goto restart_poll; | |
1172 | } | |
1da177e4 LT |
1173 | } |
1174 | ||
bea3348e | 1175 | return frames_processed; |
1da177e4 LT |
1176 | } |
1177 | ||
7d12e780 | 1178 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1179 | { |
1da177e4 | 1180 | struct net_device *netdev = dev_instance; |
4cf1653a | 1181 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1182 | unsigned long lpar_rc; |
1183 | ||
288379f0 | 1184 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1185 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1186 | VIO_IRQ_DISABLE); | |
706c8c93 | 1187 | ibmveth_assert(lpar_rc == H_SUCCESS); |
288379f0 | 1188 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1189 | } |
1190 | return IRQ_HANDLED; | |
1191 | } | |
1192 | ||
1da177e4 LT |
1193 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1194 | { | |
4cf1653a | 1195 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1196 | unsigned long lpar_rc; |
1197 | ||
4cd24eaf JP |
1198 | if ((netdev->flags & IFF_PROMISC) || |
1199 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1200 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1201 | IbmVethMcastEnableRecv | | |
1202 | IbmVethMcastDisableFiltering, | |
1203 | 0); | |
706c8c93 | 1204 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1205 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1206 | } | |
1207 | } else { | |
22bedad3 | 1208 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1209 | /* clear the filter table & disable filtering */ |
1210 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1211 | IbmVethMcastEnableRecv | | |
1212 | IbmVethMcastDisableFiltering | | |
1213 | IbmVethMcastClearFilterTable, | |
1214 | 0); | |
706c8c93 | 1215 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1216 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1217 | } | |
1218 | /* add the addresses to the filter table */ | |
22bedad3 | 1219 | netdev_for_each_mc_addr(ha, netdev) { |
1da177e4 LT |
1220 | // add the multicast address to the filter table |
1221 | unsigned long mcast_addr = 0; | |
22bedad3 | 1222 | memcpy(((char *)&mcast_addr)+2, ha->addr, 6); |
1da177e4 LT |
1223 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1224 | IbmVethMcastAddFilter, | |
1225 | mcast_addr); | |
706c8c93 | 1226 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1227 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1228 | } | |
1229 | } | |
d7fbeba6 | 1230 | |
1da177e4 LT |
1231 | /* re-enable filtering */ |
1232 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1233 | IbmVethMcastEnableFiltering, | |
1234 | 0); | |
706c8c93 | 1235 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1236 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1237 | } | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1242 | { | |
4cf1653a | 1243 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1244 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1245 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1246 | int i, rc; |
1247 | int need_restart = 0; | |
b6d35182 | 1248 | |
860f242e | 1249 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1250 | return -EINVAL; |
b6d35182 | 1251 | |
ce6eea58 BK |
1252 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1253 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1254 | break; | |
1255 | ||
1256 | if (i == IbmVethNumBufferPools) | |
1257 | return -EINVAL; | |
1258 | ||
ea866e65 SL |
1259 | /* Deactivate all the buffer pools so that the next loop can activate |
1260 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1261 | if (netif_running(adapter->netdev)) { |
1262 | need_restart = 1; | |
1263 | adapter->pool_config = 1; | |
1264 | ibmveth_close(adapter->netdev); | |
1265 | adapter->pool_config = 0; | |
1266 | } | |
ea866e65 | 1267 | |
860f242e | 1268 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1269 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ea866e65 | 1270 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1271 | |
860f242e | 1272 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1273 | dev->mtu = new_mtu; |
1274 | vio_cmo_set_dev_desired(viodev, | |
1275 | ibmveth_get_desired_dma | |
1276 | (viodev)); | |
0645bab7 RJ |
1277 | if (need_restart) { |
1278 | return ibmveth_open(adapter->netdev); | |
1279 | } | |
860f242e | 1280 | return 0; |
b6d35182 | 1281 | } |
b6d35182 | 1282 | } |
0645bab7 RJ |
1283 | |
1284 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1285 | return rc; | |
1286 | ||
860f242e | 1287 | return -EINVAL; |
1da177e4 LT |
1288 | } |
1289 | ||
6b422374 SL |
1290 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1291 | static void ibmveth_poll_controller(struct net_device *dev) | |
1292 | { | |
4cf1653a | 1293 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1294 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1295 | } |
1296 | #endif | |
1297 | ||
1096d63d RJ |
1298 | /** |
1299 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1300 | * | |
1301 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1302 | * | |
1303 | * Return value: | |
1304 | * Number of bytes of IO data the driver will need to perform well. | |
1305 | */ | |
1306 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1307 | { | |
1308 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1309 | struct ibmveth_adapter *adapter; | |
1310 | unsigned long ret; | |
1311 | int i; | |
1312 | int rxqentries = 1; | |
1313 | ||
1314 | /* netdev inits at probe time along with the structures we need below*/ | |
1315 | if (netdev == NULL) | |
1316 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1317 | ||
1318 | adapter = netdev_priv(netdev); | |
1319 | ||
1320 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1321 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1322 | ||
1323 | for (i = 0; i < IbmVethNumBufferPools; i++) { | |
1324 | /* add the size of the active receive buffers */ | |
1325 | if (adapter->rx_buff_pool[i].active) | |
1326 | ret += | |
1327 | adapter->rx_buff_pool[i].size * | |
1328 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1329 | buff_size); | |
1330 | rxqentries += adapter->rx_buff_pool[i].size; | |
1331 | } | |
1332 | /* add the size of the receive queue entries */ | |
1333 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1334 | ||
1335 | return ret; | |
1336 | } | |
1337 | ||
e186d174 AB |
1338 | static const struct net_device_ops ibmveth_netdev_ops = { |
1339 | .ndo_open = ibmveth_open, | |
1340 | .ndo_stop = ibmveth_close, | |
1341 | .ndo_start_xmit = ibmveth_start_xmit, | |
1342 | .ndo_set_multicast_list = ibmveth_set_multicast_list, | |
1343 | .ndo_do_ioctl = ibmveth_ioctl, | |
1344 | .ndo_change_mtu = ibmveth_change_mtu, | |
1345 | .ndo_validate_addr = eth_validate_addr, | |
1346 | .ndo_set_mac_address = eth_mac_addr, | |
1347 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1348 | .ndo_poll_controller = ibmveth_poll_controller, | |
1349 | #endif | |
1350 | }; | |
1351 | ||
1da177e4 LT |
1352 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1353 | { | |
b6d35182 | 1354 | int rc, i; |
1da177e4 | 1355 | struct net_device *netdev; |
9dc83afd | 1356 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1357 | |
1358 | unsigned char *mac_addr_p; | |
1359 | unsigned int *mcastFilterSize_p; | |
1360 | ||
1361 | ||
d7fbeba6 | 1362 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1363 | dev->unit_address); |
1364 | ||
493a684a ME |
1365 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1366 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1367 | if(!mac_addr_p) { |
1368 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1369 | "attribute\n", __FILE__, __LINE__); | |
1370 | return 0; | |
1371 | } | |
d7fbeba6 | 1372 | |
493a684a ME |
1373 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1374 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1375 | if(!mcastFilterSize_p) { |
1376 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1377 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1378 | __FILE__, __LINE__); | |
1379 | return 0; | |
1380 | } | |
d7fbeba6 | 1381 | |
1da177e4 LT |
1382 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1383 | ||
1384 | if(!netdev) | |
1385 | return -ENOMEM; | |
1386 | ||
4cf1653a | 1387 | adapter = netdev_priv(netdev); |
c7ae011d | 1388 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1389 | |
1390 | adapter->vdev = dev; | |
1391 | adapter->netdev = netdev; | |
1392 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1393 | adapter->pool_config = 0; |
d7fbeba6 | 1394 | |
bea3348e SH |
1395 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1396 | ||
1da177e4 | 1397 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1398 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1399 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1400 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1401 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1402 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1403 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1404 | ||
1405 | if ((*mac_addr_p & 0x3) != 0x02) | |
1406 | mac_addr_p += 2; | |
1407 | ||
1408 | adapter->mac_addr = 0; | |
1409 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1410 | ||
1da177e4 | 1411 | netdev->irq = dev->irq; |
e186d174 AB |
1412 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1413 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1414 | SET_NETDEV_DEV(netdev, &dev->dev); |
6e8ab30e | 1415 | netdev->features |= NETIF_F_SG; |
1da177e4 | 1416 | |
d44b5e07 | 1417 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1418 | |
860f242e SL |
1419 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1420 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
8dde2a96 GKH |
1421 | int error; |
1422 | ||
d7fbeba6 JG |
1423 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1424 | pool_count[i], pool_size[i], | |
860f242e | 1425 | pool_active[i]); |
8dde2a96 GKH |
1426 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1427 | &dev->dev.kobj, "pool%d", i); | |
1428 | if (!error) | |
1429 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1430 | } |
1da177e4 LT |
1431 | |
1432 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1433 | ||
1da177e4 LT |
1434 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1435 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1436 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1437 | ||
1da177e4 LT |
1438 | ibmveth_debug_printk("registering netdev...\n"); |
1439 | ||
bc4c6f54 | 1440 | ibmveth_set_csum_offload(netdev, 1, ibmveth_set_tx_csum_flags); |
f4ff2872 | 1441 | |
1da177e4 LT |
1442 | rc = register_netdev(netdev); |
1443 | ||
1444 | if(rc) { | |
1445 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1446 | free_netdev(netdev); | |
1447 | return rc; | |
1448 | } | |
1449 | ||
1450 | ibmveth_debug_printk("registered\n"); | |
1451 | ||
1da177e4 LT |
1452 | return 0; |
1453 | } | |
1454 | ||
1455 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1456 | { | |
c7ae011d | 1457 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1458 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1459 | int i; |
1460 | ||
1461 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
c10997f6 | 1462 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1463 | |
1464 | unregister_netdev(netdev); | |
1465 | ||
1da177e4 | 1466 | free_netdev(netdev); |
1096d63d RJ |
1467 | dev_set_drvdata(&dev->dev, NULL); |
1468 | ||
1da177e4 LT |
1469 | return 0; |
1470 | } | |
1471 | ||
860f242e SL |
1472 | static struct attribute veth_active_attr; |
1473 | static struct attribute veth_num_attr; | |
1474 | static struct attribute veth_size_attr; | |
1475 | ||
1476 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1477 | struct attribute * attr, char * buf) | |
1478 | { | |
d7fbeba6 | 1479 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1480 | struct ibmveth_buff_pool, |
1481 | kobj); | |
1482 | ||
1483 | if (attr == &veth_active_attr) | |
1484 | return sprintf(buf, "%d\n", pool->active); | |
1485 | else if (attr == &veth_num_attr) | |
1486 | return sprintf(buf, "%d\n", pool->size); | |
1487 | else if (attr == &veth_size_attr) | |
1488 | return sprintf(buf, "%d\n", pool->buff_size); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1493 | const char * buf, size_t count) | |
1494 | { | |
d7fbeba6 | 1495 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1496 | struct ibmveth_buff_pool, |
1497 | kobj); | |
c7ae011d GKH |
1498 | struct net_device *netdev = dev_get_drvdata( |
1499 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1500 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1501 | long value = simple_strtol(buf, NULL, 10); |
1502 | long rc; | |
1503 | ||
1504 | if (attr == &veth_active_attr) { | |
1505 | if (value && !pool->active) { | |
4aa9c93e BK |
1506 | if (netif_running(netdev)) { |
1507 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1508 | ibmveth_error_printk("unable to alloc pool\n"); | |
1509 | return -ENOMEM; | |
1510 | } | |
1511 | pool->active = 1; | |
1512 | adapter->pool_config = 1; | |
1513 | ibmveth_close(netdev); | |
1514 | adapter->pool_config = 0; | |
1515 | if ((rc = ibmveth_open(netdev))) | |
1516 | return rc; | |
1517 | } else | |
1518 | pool->active = 1; | |
860f242e SL |
1519 | } else if (!value && pool->active) { |
1520 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1521 | int i; | |
1522 | /* Make sure there is a buffer pool with buffers that | |
1523 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1524 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1525 | if (pool == &adapter->rx_buff_pool[i]) |
1526 | continue; | |
1527 | if (!adapter->rx_buff_pool[i].active) | |
1528 | continue; | |
76b9cfcc BK |
1529 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1530 | break; | |
860f242e | 1531 | } |
76b9cfcc BK |
1532 | |
1533 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1534 | ibmveth_error_printk("no active pool >= MTU\n"); |
1535 | return -EPERM; | |
1536 | } | |
76b9cfcc | 1537 | |
76b9cfcc BK |
1538 | if (netif_running(netdev)) { |
1539 | adapter->pool_config = 1; | |
1540 | ibmveth_close(netdev); | |
ea866e65 | 1541 | pool->active = 0; |
76b9cfcc BK |
1542 | adapter->pool_config = 0; |
1543 | if ((rc = ibmveth_open(netdev))) | |
1544 | return rc; | |
1545 | } | |
ea866e65 | 1546 | pool->active = 0; |
860f242e SL |
1547 | } |
1548 | } else if (attr == &veth_num_attr) { | |
1549 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1550 | return -EINVAL; | |
1551 | else { | |
4aa9c93e BK |
1552 | if (netif_running(netdev)) { |
1553 | adapter->pool_config = 1; | |
1554 | ibmveth_close(netdev); | |
1555 | adapter->pool_config = 0; | |
1556 | pool->size = value; | |
1557 | if ((rc = ibmveth_open(netdev))) | |
1558 | return rc; | |
1559 | } else | |
1560 | pool->size = value; | |
860f242e SL |
1561 | } |
1562 | } else if (attr == &veth_size_attr) { | |
1563 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1564 | return -EINVAL; | |
1565 | else { | |
4aa9c93e BK |
1566 | if (netif_running(netdev)) { |
1567 | adapter->pool_config = 1; | |
1568 | ibmveth_close(netdev); | |
1569 | adapter->pool_config = 0; | |
1570 | pool->buff_size = value; | |
1571 | if ((rc = ibmveth_open(netdev))) | |
1572 | return rc; | |
1573 | } else | |
1574 | pool->buff_size = value; | |
860f242e SL |
1575 | } |
1576 | } | |
1577 | ||
1578 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1579 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1580 | return count; |
1581 | } | |
1582 | ||
1583 | ||
1584 | #define ATTR(_name, _mode) \ | |
1585 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1586 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1587 | }; |
1588 | ||
1589 | static ATTR(active, 0644); | |
1590 | static ATTR(num, 0644); | |
1591 | static ATTR(size, 0644); | |
1592 | ||
1593 | static struct attribute * veth_pool_attrs[] = { | |
1594 | &veth_active_attr, | |
1595 | &veth_num_attr, | |
1596 | &veth_size_attr, | |
1597 | NULL, | |
1598 | }; | |
1599 | ||
52cf25d0 | 1600 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1601 | .show = veth_pool_show, |
1602 | .store = veth_pool_store, | |
1603 | }; | |
1604 | ||
1605 | static struct kobj_type ktype_veth_pool = { | |
1606 | .release = NULL, | |
1607 | .sysfs_ops = &veth_pool_ops, | |
1608 | .default_attrs = veth_pool_attrs, | |
1609 | }; | |
1610 | ||
e7a3af5d BK |
1611 | static int ibmveth_resume(struct device *dev) |
1612 | { | |
1613 | struct net_device *netdev = dev_get_drvdata(dev); | |
1614 | ibmveth_interrupt(netdev->irq, netdev); | |
1615 | return 0; | |
1616 | } | |
860f242e | 1617 | |
1da177e4 LT |
1618 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1619 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1620 | { "", "" } |
1da177e4 | 1621 | }; |
1da177e4 LT |
1622 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1623 | ||
e7a3af5d BK |
1624 | static struct dev_pm_ops ibmveth_pm_ops = { |
1625 | .resume = ibmveth_resume | |
1626 | }; | |
1627 | ||
1da177e4 | 1628 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1629 | .id_table = ibmveth_device_table, |
1630 | .probe = ibmveth_probe, | |
1631 | .remove = ibmveth_remove, | |
1096d63d | 1632 | .get_desired_dma = ibmveth_get_desired_dma, |
6fdf5392 SR |
1633 | .driver = { |
1634 | .name = ibmveth_driver_name, | |
915124d8 | 1635 | .owner = THIS_MODULE, |
e7a3af5d | 1636 | .pm = &ibmveth_pm_ops, |
6fdf5392 | 1637 | } |
1da177e4 LT |
1638 | }; |
1639 | ||
1640 | static int __init ibmveth_module_init(void) | |
1641 | { | |
1642 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1643 | ||
1da177e4 LT |
1644 | return vio_register_driver(&ibmveth_driver); |
1645 | } | |
1646 | ||
1647 | static void __exit ibmveth_module_exit(void) | |
1648 | { | |
1649 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1650 | } |
1da177e4 LT |
1651 | |
1652 | module_init(ibmveth_module_init); | |
1653 | module_exit(ibmveth_module_exit); |