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 LT |
28 | /**************************************************************************/ |
29 | /* | |
30 | TODO: | |
1da177e4 LT |
31 | - add support for sysfs |
32 | - possibly remove procfs support | |
33 | */ | |
34 | ||
1da177e4 | 35 | #include <linux/module.h> |
1096d63d | 36 | #include <linux/moduleparam.h> |
1da177e4 LT |
37 | #include <linux/types.h> |
38 | #include <linux/errno.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/dma-mapping.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/etherdevice.h> | |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/delay.h> | |
47 | #include <linux/mm.h> | |
e7a3af5d | 48 | #include <linux/pm.h> |
1da177e4 LT |
49 | #include <linux/ethtool.h> |
50 | #include <linux/proc_fs.h> | |
f4ff2872 BK |
51 | #include <linux/in.h> |
52 | #include <linux/ip.h> | |
5a0e3ad6 | 53 | #include <linux/slab.h> |
457c4cbc | 54 | #include <net/net_namespace.h> |
1da177e4 LT |
55 | #include <asm/hvcall.h> |
56 | #include <asm/atomic.h> | |
1da177e4 | 57 | #include <asm/vio.h> |
1096d63d | 58 | #include <asm/iommu.h> |
1da177e4 | 59 | #include <asm/uaccess.h> |
1096d63d | 60 | #include <asm/firmware.h> |
1da177e4 LT |
61 | #include <linux/seq_file.h> |
62 | ||
63 | #include "ibmveth.h" | |
64 | ||
6af37fa9 | 65 | #undef DEBUG |
1da177e4 LT |
66 | |
67 | #define ibmveth_printk(fmt, args...) \ | |
f98baffb | 68 | printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) |
1da177e4 LT |
69 | |
70 | #define ibmveth_error_printk(fmt, args...) \ | |
71 | printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
72 | ||
73 | #ifdef DEBUG | |
74 | #define ibmveth_debug_printk_no_adapter(fmt, args...) \ | |
75 | printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) | |
76 | #define ibmveth_debug_printk(fmt, args...) \ | |
77 | printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
78 | #define ibmveth_assert(expr) \ | |
79 | if(!(expr)) { \ | |
80 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
81 | BUG(); \ | |
82 | } | |
83 | #else | |
84 | #define ibmveth_debug_printk_no_adapter(fmt, args...) | |
85 | #define ibmveth_debug_printk(fmt, args...) | |
d7fbeba6 | 86 | #define ibmveth_assert(expr) |
1da177e4 LT |
87 | #endif |
88 | ||
89 | static int ibmveth_open(struct net_device *dev); | |
90 | static int ibmveth_close(struct net_device *dev); | |
91 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
bea3348e | 92 | static int ibmveth_poll(struct napi_struct *napi, int budget); |
1da177e4 | 93 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
1da177e4 LT |
94 | static void ibmveth_set_multicast_list(struct net_device *dev); |
95 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
96 | static void ibmveth_proc_register_driver(void); | |
97 | static void ibmveth_proc_unregister_driver(void); | |
98 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
99 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
7d12e780 | 100 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 101 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 102 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
860f242e | 103 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 104 | |
1096d63d | 105 | |
1da177e4 | 106 | #ifdef CONFIG_PROC_FS |
457c4cbc | 107 | #define IBMVETH_PROC_DIR "ibmveth" |
1da177e4 LT |
108 | static struct proc_dir_entry *ibmveth_proc_dir; |
109 | #endif | |
110 | ||
111 | static const char ibmveth_driver_name[] = "ibmveth"; | |
112 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
113 | #define ibmveth_driver_version "1.03" | |
114 | ||
115 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
116 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
117 | MODULE_LICENSE("GPL"); | |
118 | MODULE_VERSION(ibmveth_driver_version); | |
119 | ||
c08cc3cc SL |
120 | static unsigned int tx_copybreak __read_mostly = 128; |
121 | module_param(tx_copybreak, uint, 0644); | |
122 | MODULE_PARM_DESC(tx_copybreak, | |
123 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
124 | ||
8d86c61a SL |
125 | static unsigned int rx_copybreak __read_mostly = 128; |
126 | module_param(rx_copybreak, uint, 0644); | |
127 | MODULE_PARM_DESC(rx_copybreak, | |
128 | "Maximum size of packet that is copied to a new buffer on receive"); | |
129 | ||
0c26b677 SL |
130 | static unsigned int rx_flush __read_mostly = 0; |
131 | module_param(rx_flush, uint, 0644); | |
132 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
133 | ||
ddbb4de9 BK |
134 | struct ibmveth_stat { |
135 | char name[ETH_GSTRING_LEN]; | |
136 | int offset; | |
137 | }; | |
138 | ||
139 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
140 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
141 | ||
142 | struct ibmveth_stat ibmveth_stats[] = { | |
143 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
144 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
145 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
146 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
147 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
148 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
149 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
150 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
151 | }; | |
152 | ||
1da177e4 | 153 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
154 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
155 | { | |
156 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
157 | } | |
158 | ||
159 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
160 | { | |
161 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; | |
162 | } | |
163 | ||
1da177e4 LT |
164 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
165 | { | |
79ef4a4d | 166 | return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); |
1da177e4 LT |
167 | } |
168 | ||
169 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
170 | { | |
79ef4a4d | 171 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); |
1da177e4 LT |
172 | } |
173 | ||
174 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
175 | { | |
79ef4a4d | 176 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); |
1da177e4 LT |
177 | } |
178 | ||
179 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
180 | { | |
181 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
182 | } | |
183 | ||
f4ff2872 BK |
184 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
185 | { | |
79ef4a4d | 186 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); |
f4ff2872 BK |
187 | } |
188 | ||
1da177e4 | 189 | /* setup the initial settings for a buffer pool */ |
860f242e | 190 | 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 |
191 | { |
192 | pool->size = pool_size; | |
193 | pool->index = pool_index; | |
194 | pool->buff_size = buff_size; | |
c033a6d1 | 195 | pool->threshold = pool_size * 7 / 8; |
860f242e | 196 | pool->active = pool_active; |
1da177e4 LT |
197 | } |
198 | ||
199 | /* allocate and setup an buffer pool - called during open */ | |
200 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
201 | { | |
202 | int i; | |
203 | ||
d7fbeba6 | 204 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
205 | |
206 | if(!pool->free_map) { | |
207 | return -1; | |
208 | } | |
209 | ||
d7fbeba6 | 210 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
211 | if(!pool->dma_addr) { |
212 | kfree(pool->free_map); | |
213 | pool->free_map = NULL; | |
214 | return -1; | |
215 | } | |
216 | ||
a05abcb5 | 217 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
218 | |
219 | if(!pool->skbuff) { | |
220 | kfree(pool->dma_addr); | |
221 | pool->dma_addr = NULL; | |
222 | ||
223 | kfree(pool->free_map); | |
224 | pool->free_map = NULL; | |
225 | return -1; | |
226 | } | |
227 | ||
1da177e4 LT |
228 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
229 | ||
230 | for(i = 0; i < pool->size; ++i) { | |
231 | pool->free_map[i] = i; | |
232 | } | |
233 | ||
234 | atomic_set(&pool->available, 0); | |
235 | pool->producer_index = 0; | |
236 | pool->consumer_index = 0; | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
0c26b677 SL |
241 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
242 | { | |
243 | unsigned long offset; | |
244 | ||
245 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
246 | asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); | |
247 | } | |
248 | ||
1da177e4 LT |
249 | /* replenish the buffers for a pool. note that we don't need to |
250 | * skb_reserve these since they are used for incoming... | |
251 | */ | |
252 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
253 | { | |
254 | u32 i; | |
255 | u32 count = pool->size - atomic_read(&pool->available); | |
256 | u32 buffers_added = 0; | |
1096d63d RJ |
257 | struct sk_buff *skb; |
258 | unsigned int free_index, index; | |
259 | u64 correlator; | |
260 | unsigned long lpar_rc; | |
261 | dma_addr_t dma_addr; | |
1da177e4 LT |
262 | |
263 | mb(); | |
264 | ||
265 | for(i = 0; i < count; ++i) { | |
1da177e4 | 266 | union ibmveth_buf_desc desc; |
1da177e4 LT |
267 | |
268 | skb = alloc_skb(pool->buff_size, GFP_ATOMIC); | |
269 | ||
270 | if(!skb) { | |
271 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
272 | adapter->replenish_no_mem++; | |
273 | break; | |
274 | } | |
275 | ||
047a66d4 | 276 | free_index = pool->consumer_index; |
a613f581 SL |
277 | pool->consumer_index++; |
278 | if (pool->consumer_index >= pool->size) | |
279 | pool->consumer_index = 0; | |
1da177e4 | 280 | index = pool->free_map[free_index]; |
d7fbeba6 | 281 | |
1da177e4 LT |
282 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
283 | ibmveth_assert(pool->skbuff[index] == NULL); | |
284 | ||
285 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
286 | pool->buff_size, DMA_FROM_DEVICE); | |
287 | ||
c713e7cb | 288 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
289 | goto failure; |
290 | ||
1da177e4 LT |
291 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
292 | pool->dma_addr[index] = dma_addr; | |
293 | pool->skbuff[index] = skb; | |
294 | ||
295 | correlator = ((u64)pool->index << 32) | index; | |
296 | *(u64*)skb->data = correlator; | |
297 | ||
79ef4a4d | 298 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 299 | desc.fields.address = dma_addr; |
1da177e4 | 300 | |
0c26b677 SL |
301 | if (rx_flush) { |
302 | unsigned int len = min(pool->buff_size, | |
303 | adapter->netdev->mtu + | |
304 | IBMVETH_BUFF_OH); | |
305 | ibmveth_flush_buffer(skb->data, len); | |
306 | } | |
1da177e4 | 307 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); |
d7fbeba6 | 308 | |
1096d63d RJ |
309 | if (lpar_rc != H_SUCCESS) |
310 | goto failure; | |
311 | else { | |
1da177e4 LT |
312 | buffers_added++; |
313 | adapter->replenish_add_buff_success++; | |
314 | } | |
315 | } | |
d7fbeba6 | 316 | |
1096d63d RJ |
317 | mb(); |
318 | atomic_add(buffers_added, &(pool->available)); | |
319 | return; | |
320 | ||
321 | failure: | |
322 | pool->free_map[free_index] = index; | |
323 | pool->skbuff[index] = NULL; | |
324 | if (pool->consumer_index == 0) | |
325 | pool->consumer_index = pool->size - 1; | |
326 | else | |
327 | pool->consumer_index--; | |
c713e7cb | 328 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
329 | dma_unmap_single(&adapter->vdev->dev, |
330 | pool->dma_addr[index], pool->buff_size, | |
331 | DMA_FROM_DEVICE); | |
332 | dev_kfree_skb_any(skb); | |
333 | adapter->replenish_add_buff_failure++; | |
334 | ||
1da177e4 LT |
335 | mb(); |
336 | atomic_add(buffers_added, &(pool->available)); | |
337 | } | |
338 | ||
e2adbcb4 | 339 | /* replenish routine */ |
d7fbeba6 | 340 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 341 | { |
b6d35182 SL |
342 | int i; |
343 | ||
1da177e4 LT |
344 | adapter->replenish_task_cycles++; |
345 | ||
c033a6d1 SL |
346 | for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) { |
347 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; | |
348 | ||
349 | if (pool->active && | |
350 | (atomic_read(&pool->available) < pool->threshold)) | |
351 | ibmveth_replenish_buffer_pool(adapter, pool); | |
352 | } | |
1da177e4 LT |
353 | |
354 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
355 | } |
356 | ||
357 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
358 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
359 | { | |
360 | int i; | |
361 | ||
b4558ea9 JJ |
362 | kfree(pool->free_map); |
363 | pool->free_map = NULL; | |
1da177e4 LT |
364 | |
365 | if(pool->skbuff && pool->dma_addr) { | |
366 | for(i = 0; i < pool->size; ++i) { | |
367 | struct sk_buff *skb = pool->skbuff[i]; | |
368 | if(skb) { | |
369 | dma_unmap_single(&adapter->vdev->dev, | |
370 | pool->dma_addr[i], | |
371 | pool->buff_size, | |
372 | DMA_FROM_DEVICE); | |
373 | dev_kfree_skb_any(skb); | |
374 | pool->skbuff[i] = NULL; | |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | if(pool->dma_addr) { | |
380 | kfree(pool->dma_addr); | |
381 | pool->dma_addr = NULL; | |
382 | } | |
383 | ||
384 | if(pool->skbuff) { | |
385 | kfree(pool->skbuff); | |
386 | pool->skbuff = NULL; | |
387 | } | |
388 | } | |
389 | ||
390 | /* remove a buffer from a pool */ | |
391 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
392 | { | |
393 | unsigned int pool = correlator >> 32; | |
394 | unsigned int index = correlator & 0xffffffffUL; | |
395 | unsigned int free_index; | |
396 | struct sk_buff *skb; | |
397 | ||
398 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
399 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
400 | ||
401 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
402 | ||
403 | ibmveth_assert(skb != NULL); | |
404 | ||
405 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
406 | ||
407 | dma_unmap_single(&adapter->vdev->dev, | |
408 | adapter->rx_buff_pool[pool].dma_addr[index], | |
409 | adapter->rx_buff_pool[pool].buff_size, | |
410 | DMA_FROM_DEVICE); | |
411 | ||
047a66d4 | 412 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
413 | adapter->rx_buff_pool[pool].producer_index++; |
414 | if (adapter->rx_buff_pool[pool].producer_index >= | |
415 | adapter->rx_buff_pool[pool].size) | |
416 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
417 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
418 | ||
419 | mb(); | |
420 | ||
421 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
422 | } | |
423 | ||
424 | /* get the current buffer on the rx queue */ | |
425 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
426 | { | |
427 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
428 | unsigned int pool = correlator >> 32; | |
429 | unsigned int index = correlator & 0xffffffffUL; | |
430 | ||
431 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
432 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
433 | ||
434 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
435 | } | |
436 | ||
437 | /* recycle the current buffer on the rx queue */ | |
438 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
439 | { | |
440 | u32 q_index = adapter->rx_queue.index; | |
441 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
442 | unsigned int pool = correlator >> 32; | |
443 | unsigned int index = correlator & 0xffffffffUL; | |
444 | union ibmveth_buf_desc desc; | |
445 | unsigned long lpar_rc; | |
446 | ||
447 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
448 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
449 | ||
b6d35182 SL |
450 | if(!adapter->rx_buff_pool[pool].active) { |
451 | ibmveth_rxq_harvest_buffer(adapter); | |
452 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
453 | return; | |
454 | } | |
455 | ||
79ef4a4d BK |
456 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
457 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
458 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
459 | ||
460 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 461 | |
706c8c93 | 462 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
463 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
464 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
465 | } | |
466 | ||
467 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
468 | adapter->rx_queue.index = 0; | |
469 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
470 | } | |
471 | } | |
472 | ||
493a684a | 473 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
474 | { |
475 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
476 | ||
477 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
478 | adapter->rx_queue.index = 0; | |
479 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
480 | } | |
481 | } | |
482 | ||
483 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
484 | { | |
b6d35182 | 485 | int i; |
8d8bb39b | 486 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 487 | |
1da177e4 | 488 | if(adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
489 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
490 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
491 | DMA_BIDIRECTIONAL); |
492 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
493 | } | |
494 | free_page((unsigned long)adapter->buffer_list_addr); | |
495 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 496 | } |
1da177e4 LT |
497 | |
498 | if(adapter->filter_list_addr != NULL) { | |
8d8bb39b FT |
499 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
500 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
501 | DMA_BIDIRECTIONAL); |
502 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
503 | } | |
504 | free_page((unsigned long)adapter->filter_list_addr); | |
505 | adapter->filter_list_addr = NULL; | |
506 | } | |
507 | ||
508 | if(adapter->rx_queue.queue_addr != NULL) { | |
8d8bb39b FT |
509 | if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) { |
510 | dma_unmap_single(dev, | |
1da177e4 LT |
511 | adapter->rx_queue.queue_dma, |
512 | adapter->rx_queue.queue_len, | |
513 | DMA_BIDIRECTIONAL); | |
514 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
515 | } | |
516 | kfree(adapter->rx_queue.queue_addr); | |
517 | adapter->rx_queue.queue_addr = NULL; | |
518 | } | |
519 | ||
b6d35182 | 520 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 521 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 522 | ibmveth_free_buffer_pool(adapter, |
860f242e | 523 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
524 | |
525 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 526 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
527 | dma_unmap_single(&adapter->vdev->dev, |
528 | adapter->bounce_buffer_dma, | |
529 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
530 | DMA_BIDIRECTIONAL); | |
531 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
532 | } | |
533 | kfree(adapter->bounce_buffer); | |
534 | adapter->bounce_buffer = NULL; | |
535 | } | |
1da177e4 LT |
536 | } |
537 | ||
bbedefcc ME |
538 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
539 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
540 | { | |
541 | int rc, try_again = 1; | |
542 | ||
543 | /* After a kexec the adapter will still be open, so our attempt to | |
544 | * open it will fail. So if we get a failure we free the adapter and | |
545 | * try again, but only once. */ | |
546 | retry: | |
547 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
548 | adapter->buffer_list_dma, rxq_desc.desc, | |
549 | adapter->filter_list_dma, mac_address); | |
550 | ||
551 | if (rc != H_SUCCESS && try_again) { | |
552 | do { | |
553 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
554 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
555 | ||
556 | try_again = 0; | |
557 | goto retry; | |
558 | } | |
559 | ||
560 | return rc; | |
561 | } | |
562 | ||
1da177e4 LT |
563 | static int ibmveth_open(struct net_device *netdev) |
564 | { | |
4cf1653a | 565 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 566 | u64 mac_address = 0; |
b6d35182 | 567 | int rxq_entries = 1; |
1da177e4 LT |
568 | unsigned long lpar_rc; |
569 | int rc; | |
570 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 571 | int i; |
8d8bb39b | 572 | struct device *dev; |
1da177e4 LT |
573 | |
574 | ibmveth_debug_printk("open starting\n"); | |
575 | ||
bea3348e SH |
576 | napi_enable(&adapter->napi); |
577 | ||
b6d35182 SL |
578 | for(i = 0; i<IbmVethNumBufferPools; i++) |
579 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 580 | |
1da177e4 LT |
581 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
582 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 583 | |
1da177e4 LT |
584 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
585 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
586 | ibmveth_cleanup(adapter); | |
bea3348e | 587 | napi_disable(&adapter->napi); |
1da177e4 LT |
588 | return -ENOMEM; |
589 | } | |
590 | ||
591 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
592 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
593 | ||
594 | if(!adapter->rx_queue.queue_addr) { | |
595 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
596 | ibmveth_cleanup(adapter); | |
bea3348e | 597 | napi_disable(&adapter->napi); |
1da177e4 LT |
598 | return -ENOMEM; |
599 | } | |
600 | ||
8d8bb39b FT |
601 | dev = &adapter->vdev->dev; |
602 | ||
603 | adapter->buffer_list_dma = dma_map_single(dev, | |
1da177e4 | 604 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 605 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 606 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 607 | adapter->rx_queue.queue_dma = dma_map_single(dev, |
1da177e4 LT |
608 | adapter->rx_queue.queue_addr, |
609 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
610 | ||
8d8bb39b FT |
611 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
612 | (dma_mapping_error(dev, adapter->filter_list_dma)) || | |
613 | (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) { | |
1da177e4 LT |
614 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); |
615 | ibmveth_cleanup(adapter); | |
bea3348e | 616 | napi_disable(&adapter->napi); |
1da177e4 LT |
617 | return -ENOMEM; |
618 | } | |
619 | ||
620 | adapter->rx_queue.index = 0; | |
621 | adapter->rx_queue.num_slots = rxq_entries; | |
622 | adapter->rx_queue.toggle = 1; | |
623 | ||
1da177e4 LT |
624 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
625 | mac_address = mac_address >> 16; | |
626 | ||
79ef4a4d | 627 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; |
1da177e4 LT |
628 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
629 | ||
630 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
631 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
632 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
633 | ||
4347ef15 SL |
634 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
635 | ||
bbedefcc | 636 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 637 | |
706c8c93 | 638 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 639 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
a1c5a893 | 640 | ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n", |
1da177e4 LT |
641 | adapter->buffer_list_dma, |
642 | adapter->filter_list_dma, | |
643 | rxq_desc.desc, | |
644 | mac_address); | |
645 | ibmveth_cleanup(adapter); | |
bea3348e | 646 | napi_disable(&adapter->napi); |
d7fbeba6 | 647 | return -ENONET; |
1da177e4 LT |
648 | } |
649 | ||
860f242e SL |
650 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
651 | if(!adapter->rx_buff_pool[i].active) | |
652 | continue; | |
653 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
654 | ibmveth_error_printk("unable to alloc pool\n"); | |
655 | adapter->rx_buff_pool[i].active = 0; | |
656 | ibmveth_cleanup(adapter); | |
bea3348e | 657 | napi_disable(&adapter->napi); |
860f242e SL |
658 | return -ENOMEM ; |
659 | } | |
660 | } | |
661 | ||
1da177e4 | 662 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
a0607fd3 | 663 | if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { |
1da177e4 LT |
664 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); |
665 | do { | |
666 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 667 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
668 | |
669 | ibmveth_cleanup(adapter); | |
bea3348e | 670 | napi_disable(&adapter->napi); |
1da177e4 LT |
671 | return rc; |
672 | } | |
673 | ||
1096d63d RJ |
674 | adapter->bounce_buffer = |
675 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
676 | if (!adapter->bounce_buffer) { | |
677 | ibmveth_error_printk("unable to allocate bounce buffer\n"); | |
678 | ibmveth_cleanup(adapter); | |
679 | napi_disable(&adapter->napi); | |
680 | return -ENOMEM; | |
681 | } | |
682 | adapter->bounce_buffer_dma = | |
683 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
684 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 685 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
686 | ibmveth_error_printk("unable to map bounce buffer\n"); |
687 | ibmveth_cleanup(adapter); | |
688 | napi_disable(&adapter->napi); | |
689 | return -ENOMEM; | |
690 | } | |
691 | ||
e2adbcb4 | 692 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 693 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 694 | |
e2adbcb4 | 695 | netif_start_queue(netdev); |
1da177e4 LT |
696 | |
697 | ibmveth_debug_printk("open complete\n"); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | static int ibmveth_close(struct net_device *netdev) | |
703 | { | |
4cf1653a | 704 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 705 | long lpar_rc; |
d7fbeba6 | 706 | |
1da177e4 LT |
707 | ibmveth_debug_printk("close starting\n"); |
708 | ||
bea3348e SH |
709 | napi_disable(&adapter->napi); |
710 | ||
860f242e SL |
711 | if (!adapter->pool_config) |
712 | netif_stop_queue(netdev); | |
1da177e4 | 713 | |
ee2e6114 | 714 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 715 | |
1da177e4 LT |
716 | do { |
717 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 718 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 719 | |
706c8c93 | 720 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
721 | { |
722 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
723 | lpar_rc); | |
724 | } | |
725 | ||
ee2e6114 RJ |
726 | free_irq(netdev->irq, netdev); |
727 | ||
1da177e4 LT |
728 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); |
729 | ||
730 | ibmveth_cleanup(adapter); | |
731 | ||
732 | ibmveth_debug_printk("close complete\n"); | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
737 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
738 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
739 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
740 | cmd->speed = SPEED_1000; | |
741 | cmd->duplex = DUPLEX_FULL; | |
742 | cmd->port = PORT_FIBRE; | |
743 | cmd->phy_address = 0; | |
744 | cmd->transceiver = XCVR_INTERNAL; | |
745 | cmd->autoneg = AUTONEG_ENABLE; | |
746 | cmd->maxtxpkt = 0; | |
747 | cmd->maxrxpkt = 1; | |
748 | return 0; | |
749 | } | |
750 | ||
751 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
752 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
753 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
754 | } | |
755 | ||
756 | static u32 netdev_get_link(struct net_device *dev) { | |
757 | return 1; | |
758 | } | |
759 | ||
5fc7e01c BK |
760 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
761 | { | |
4cf1653a | 762 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
763 | |
764 | if (data) | |
765 | adapter->rx_csum = 1; | |
766 | else { | |
767 | /* | |
768 | * Since the ibmveth firmware interface does not have the concept of | |
769 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
770 | * we also have to disable tx checksum offload. Once we disable rx | |
771 | * checksum offload, we are no longer allowed to send tx buffers that | |
772 | * are not properly checksummed. | |
773 | */ | |
774 | adapter->rx_csum = 0; | |
775 | dev->features &= ~NETIF_F_IP_CSUM; | |
776 | } | |
777 | } | |
778 | ||
779 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
780 | { | |
4cf1653a | 781 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
782 | |
783 | if (data) { | |
784 | dev->features |= NETIF_F_IP_CSUM; | |
785 | adapter->rx_csum = 1; | |
786 | } else | |
787 | dev->features &= ~NETIF_F_IP_CSUM; | |
788 | } | |
789 | ||
790 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
791 | void (*done) (struct net_device *, u32)) | |
792 | { | |
4cf1653a | 793 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 794 | unsigned long set_attr, clr_attr, ret_attr; |
5fc7e01c BK |
795 | long ret; |
796 | int rc1 = 0, rc2 = 0; | |
797 | int restart = 0; | |
798 | ||
799 | if (netif_running(dev)) { | |
800 | restart = 1; | |
801 | adapter->pool_config = 1; | |
802 | ibmveth_close(dev); | |
803 | adapter->pool_config = 0; | |
804 | } | |
805 | ||
79ef4a4d BK |
806 | set_attr = 0; |
807 | clr_attr = 0; | |
5fc7e01c BK |
808 | |
809 | if (data) | |
79ef4a4d | 810 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
5fc7e01c | 811 | else |
79ef4a4d | 812 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
5fc7e01c | 813 | |
79ef4a4d | 814 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 815 | |
79ef4a4d BK |
816 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
817 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
818 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
819 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
820 | set_attr, &ret_attr); | |
5fc7e01c BK |
821 | |
822 | if (ret != H_SUCCESS) { | |
823 | rc1 = -EIO; | |
824 | ibmveth_error_printk("unable to change checksum offload settings." | |
825 | " %d rc=%ld\n", data, ret); | |
826 | ||
827 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
79ef4a4d | 828 | set_attr, clr_attr, &ret_attr); |
5fc7e01c BK |
829 | } else |
830 | done(dev, data); | |
831 | } else { | |
832 | rc1 = -EIO; | |
833 | ibmveth_error_printk("unable to change checksum offload settings." | |
79ef4a4d | 834 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr); |
5fc7e01c BK |
835 | } |
836 | ||
837 | if (restart) | |
838 | rc2 = ibmveth_open(dev); | |
839 | ||
840 | return rc1 ? rc1 : rc2; | |
841 | } | |
842 | ||
843 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
844 | { | |
4cf1653a | 845 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
846 | |
847 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
848 | return 0; | |
849 | ||
850 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
851 | } | |
852 | ||
853 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
854 | { | |
4cf1653a | 855 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
856 | int rc = 0; |
857 | ||
858 | if (data && (dev->features & NETIF_F_IP_CSUM)) | |
859 | return 0; | |
860 | if (!data && !(dev->features & NETIF_F_IP_CSUM)) | |
861 | return 0; | |
862 | ||
863 | if (data && !adapter->rx_csum) | |
864 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
865 | else | |
866 | ibmveth_set_tx_csum_flags(dev, data); | |
867 | ||
868 | return rc; | |
869 | } | |
870 | ||
871 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
872 | { | |
4cf1653a | 873 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
874 | return adapter->rx_csum; |
875 | } | |
876 | ||
ddbb4de9 BK |
877 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
878 | { | |
879 | int i; | |
880 | ||
881 | if (stringset != ETH_SS_STATS) | |
882 | return; | |
883 | ||
884 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
885 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
886 | } | |
887 | ||
b9f2c044 | 888 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 889 | { |
b9f2c044 JG |
890 | switch (sset) { |
891 | case ETH_SS_STATS: | |
892 | return ARRAY_SIZE(ibmveth_stats); | |
893 | default: | |
894 | return -EOPNOTSUPP; | |
895 | } | |
ddbb4de9 BK |
896 | } |
897 | ||
898 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
899 | struct ethtool_stats *stats, u64 *data) | |
900 | { | |
901 | int i; | |
4cf1653a | 902 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
903 | |
904 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
905 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
906 | } | |
907 | ||
7282d491 | 908 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
909 | .get_drvinfo = netdev_get_drvinfo, |
910 | .get_settings = netdev_get_settings, | |
911 | .get_link = netdev_get_link, | |
5fc7e01c BK |
912 | .set_tx_csum = ibmveth_set_tx_csum, |
913 | .get_rx_csum = ibmveth_get_rx_csum, | |
914 | .set_rx_csum = ibmveth_set_rx_csum, | |
ddbb4de9 | 915 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 916 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 917 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
6e8ab30e | 918 | .set_sg = ethtool_op_set_sg, |
1da177e4 LT |
919 | }; |
920 | ||
921 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
922 | { | |
923 | return -EOPNOTSUPP; | |
924 | } | |
925 | ||
926 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
927 | ||
6e8ab30e SL |
928 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
929 | union ibmveth_buf_desc *descs) | |
1da177e4 | 930 | { |
1da177e4 LT |
931 | unsigned long correlator; |
932 | unsigned int retry_count; | |
6e8ab30e SL |
933 | unsigned long ret; |
934 | ||
935 | /* | |
936 | * The retry count sets a maximum for the number of broadcast and | |
937 | * multicast destinations within the system. | |
938 | */ | |
939 | retry_count = 1024; | |
940 | correlator = 0; | |
941 | do { | |
942 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
943 | descs[0].desc, descs[1].desc, | |
944 | descs[2].desc, descs[3].desc, | |
945 | descs[4].desc, descs[5].desc, | |
946 | correlator, &correlator); | |
947 | } while ((ret == H_BUSY) && (retry_count--)); | |
948 | ||
949 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
950 | ibmveth_error_printk("tx: h_send_logical_lan failed with " | |
951 | "rc=%ld\n", ret); | |
952 | return 1; | |
953 | } | |
954 | ||
955 | return 0; | |
956 | } | |
60296d9e | 957 | |
6e8ab30e SL |
958 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
959 | struct net_device *netdev) | |
960 | { | |
961 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
962 | unsigned int desc_flags; | |
963 | union ibmveth_buf_desc descs[6]; | |
964 | int last, i; | |
965 | int force_bounce = 0; | |
966 | ||
967 | /* | |
968 | * veth handles a maximum of 6 segments including the header, so | |
969 | * we have to linearize the skb if there are more than this. | |
970 | */ | |
971 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
972 | netdev->stats.tx_dropped++; | |
973 | goto out; | |
974 | } | |
1da177e4 | 975 | |
6e8ab30e | 976 | /* veth can't checksum offload UDP */ |
f4ff2872 BK |
977 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
978 | ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { | |
979 | ibmveth_error_printk("tx: failed to checksum packet\n"); | |
6e8ab30e | 980 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
981 | goto out; |
982 | } | |
983 | ||
6e8ab30e SL |
984 | desc_flags = IBMVETH_BUF_VALID; |
985 | ||
f4ff2872 | 986 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
987 | unsigned char *buf = skb_transport_header(skb) + |
988 | skb->csum_offset; | |
f4ff2872 | 989 | |
6e8ab30e | 990 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
991 | |
992 | /* Need to zero out the checksum */ | |
993 | buf[0] = 0; | |
994 | buf[1] = 0; | |
995 | } | |
996 | ||
6e8ab30e SL |
997 | retry_bounce: |
998 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 999 | |
6e8ab30e SL |
1000 | /* |
1001 | * If a linear packet is below the rx threshold then | |
1002 | * copy it into the static bounce buffer. This avoids the | |
1003 | * cost of a TCE insert and remove. | |
1004 | */ | |
1005 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
1006 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
1007 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
1008 | skb->len); | |
1da177e4 | 1009 | |
6e8ab30e SL |
1010 | descs[0].fields.flags_len = desc_flags | skb->len; |
1011 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
1012 | ||
1013 | if (ibmveth_send(adapter, descs)) { | |
1014 | adapter->tx_send_failed++; | |
1015 | netdev->stats.tx_dropped++; | |
1016 | } else { | |
1017 | netdev->stats.tx_packets++; | |
1018 | netdev->stats.tx_bytes += skb->len; | |
1019 | } | |
1020 | ||
1021 | goto out; | |
1022 | } | |
1023 | ||
1024 | /* Map the header */ | |
1025 | descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
1026 | skb_headlen(skb), | |
1027 | DMA_TO_DEVICE); | |
1028 | if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address)) | |
1029 | goto map_failed; | |
1030 | ||
1031 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
1032 | ||
1033 | /* Map the frags */ | |
1034 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1035 | unsigned long dma_addr; | |
1036 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1037 | ||
1038 | dma_addr = dma_map_page(&adapter->vdev->dev, frag->page, | |
1039 | frag->page_offset, frag->size, | |
1040 | DMA_TO_DEVICE); | |
1041 | ||
1042 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1043 | goto map_failed_frags; | |
1044 | ||
1045 | descs[i+1].fields.flags_len = desc_flags | frag->size; | |
1046 | descs[i+1].fields.address = dma_addr; | |
1047 | } | |
1048 | ||
1049 | if (ibmveth_send(adapter, descs)) { | |
1050 | adapter->tx_send_failed++; | |
1051 | netdev->stats.tx_dropped++; | |
1da177e4 | 1052 | } else { |
6e8ab30e SL |
1053 | netdev->stats.tx_packets++; |
1054 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1055 | } |
1056 | ||
6e8ab30e SL |
1057 | for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) |
1058 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1059 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1060 | DMA_TO_DEVICE); | |
1da177e4 | 1061 | |
e8cb7eb4 | 1062 | out: |
1da177e4 | 1063 | dev_kfree_skb(skb); |
6ed10654 | 1064 | return NETDEV_TX_OK; |
6e8ab30e SL |
1065 | |
1066 | map_failed_frags: | |
1067 | last = i+1; | |
1068 | for (i = 0; i < last; i++) | |
1069 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1070 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1071 | DMA_TO_DEVICE); | |
1072 | ||
1073 | map_failed: | |
1074 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
1075 | ibmveth_error_printk("tx: unable to map xmit buffer\n"); | |
1076 | adapter->tx_map_failed++; | |
1077 | skb_linearize(skb); | |
1078 | force_bounce = 1; | |
1079 | goto retry_bounce; | |
1da177e4 LT |
1080 | } |
1081 | ||
bea3348e | 1082 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1083 | { |
bea3348e SH |
1084 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
1085 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 1086 | int frames_processed = 0; |
1da177e4 LT |
1087 | unsigned long lpar_rc; |
1088 | ||
1089 | restart_poll: | |
1090 | do { | |
bea3348e SH |
1091 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1092 | break; | |
1da177e4 | 1093 | |
f89e49e7 | 1094 | smp_rmb(); |
bea3348e SH |
1095 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1096 | wmb(); /* suggested by larson1 */ | |
1097 | adapter->rx_invalid_buffer++; | |
1098 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
1099 | ibmveth_rxq_recycle_buffer(adapter); | |
1100 | } else { | |
8d86c61a | 1101 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1102 | int length = ibmveth_rxq_frame_length(adapter); |
1103 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1104 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1105 | ||
bea3348e | 1106 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1107 | |
8d86c61a SL |
1108 | new_skb = NULL; |
1109 | if (length < rx_copybreak) | |
1110 | new_skb = netdev_alloc_skb(netdev, length); | |
1111 | ||
1112 | if (new_skb) { | |
1113 | skb_copy_to_linear_data(new_skb, | |
1114 | skb->data + offset, | |
1115 | length); | |
0c26b677 SL |
1116 | if (rx_flush) |
1117 | ibmveth_flush_buffer(skb->data, | |
1118 | length + offset); | |
8d86c61a SL |
1119 | skb = new_skb; |
1120 | ibmveth_rxq_recycle_buffer(adapter); | |
1121 | } else { | |
1122 | ibmveth_rxq_harvest_buffer(adapter); | |
1123 | skb_reserve(skb, offset); | |
1124 | } | |
1da177e4 | 1125 | |
bea3348e SH |
1126 | skb_put(skb, length); |
1127 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1128 | |
8d86c61a SL |
1129 | if (csum_good) |
1130 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1131 | ||
bea3348e | 1132 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1133 | |
09f75cd7 JG |
1134 | netdev->stats.rx_packets++; |
1135 | netdev->stats.rx_bytes += length; | |
bea3348e | 1136 | frames_processed++; |
1da177e4 | 1137 | } |
bea3348e | 1138 | } while (frames_processed < budget); |
1da177e4 | 1139 | |
e2adbcb4 | 1140 | ibmveth_replenish_task(adapter); |
1da177e4 | 1141 | |
bea3348e SH |
1142 | if (frames_processed < budget) { |
1143 | /* We think we are done - reenable interrupts, | |
1144 | * then check once more to make sure we are done. | |
1145 | */ | |
1146 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1147 | VIO_IRQ_ENABLE); | |
1da177e4 | 1148 | |
bea3348e | 1149 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 1150 | |
288379f0 | 1151 | napi_complete(napi); |
1da177e4 | 1152 | |
bea3348e | 1153 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1154 | napi_reschedule(napi)) { |
bea3348e SH |
1155 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1156 | VIO_IRQ_DISABLE); | |
1157 | goto restart_poll; | |
1158 | } | |
1da177e4 LT |
1159 | } |
1160 | ||
bea3348e | 1161 | return frames_processed; |
1da177e4 LT |
1162 | } |
1163 | ||
7d12e780 | 1164 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1165 | { |
1da177e4 | 1166 | struct net_device *netdev = dev_instance; |
4cf1653a | 1167 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1168 | unsigned long lpar_rc; |
1169 | ||
288379f0 | 1170 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1171 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1172 | VIO_IRQ_DISABLE); | |
706c8c93 | 1173 | ibmveth_assert(lpar_rc == H_SUCCESS); |
288379f0 | 1174 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1175 | } |
1176 | return IRQ_HANDLED; | |
1177 | } | |
1178 | ||
1da177e4 LT |
1179 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1180 | { | |
4cf1653a | 1181 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1182 | unsigned long lpar_rc; |
1183 | ||
4cd24eaf JP |
1184 | if ((netdev->flags & IFF_PROMISC) || |
1185 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1186 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1187 | IbmVethMcastEnableRecv | | |
1188 | IbmVethMcastDisableFiltering, | |
1189 | 0); | |
706c8c93 | 1190 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1191 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1192 | } | |
1193 | } else { | |
22bedad3 | 1194 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1195 | /* clear the filter table & disable filtering */ |
1196 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1197 | IbmVethMcastEnableRecv | | |
1198 | IbmVethMcastDisableFiltering | | |
1199 | IbmVethMcastClearFilterTable, | |
1200 | 0); | |
706c8c93 | 1201 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1202 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1203 | } | |
1204 | /* add the addresses to the filter table */ | |
22bedad3 | 1205 | netdev_for_each_mc_addr(ha, netdev) { |
1da177e4 LT |
1206 | // add the multicast address to the filter table |
1207 | unsigned long mcast_addr = 0; | |
22bedad3 | 1208 | memcpy(((char *)&mcast_addr)+2, ha->addr, 6); |
1da177e4 LT |
1209 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1210 | IbmVethMcastAddFilter, | |
1211 | mcast_addr); | |
706c8c93 | 1212 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1213 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1214 | } | |
1215 | } | |
d7fbeba6 | 1216 | |
1da177e4 LT |
1217 | /* re-enable filtering */ |
1218 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1219 | IbmVethMcastEnableFiltering, | |
1220 | 0); | |
706c8c93 | 1221 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1222 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1223 | } | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1228 | { | |
4cf1653a | 1229 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1230 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1231 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1232 | int i, rc; |
1233 | int need_restart = 0; | |
b6d35182 | 1234 | |
860f242e | 1235 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1236 | return -EINVAL; |
b6d35182 | 1237 | |
ce6eea58 BK |
1238 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1239 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1240 | break; | |
1241 | ||
1242 | if (i == IbmVethNumBufferPools) | |
1243 | return -EINVAL; | |
1244 | ||
ea866e65 SL |
1245 | /* Deactivate all the buffer pools so that the next loop can activate |
1246 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1247 | if (netif_running(adapter->netdev)) { |
1248 | need_restart = 1; | |
1249 | adapter->pool_config = 1; | |
1250 | ibmveth_close(adapter->netdev); | |
1251 | adapter->pool_config = 0; | |
1252 | } | |
ea866e65 | 1253 | |
860f242e | 1254 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1255 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ea866e65 | 1256 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1257 | |
860f242e | 1258 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1259 | dev->mtu = new_mtu; |
1260 | vio_cmo_set_dev_desired(viodev, | |
1261 | ibmveth_get_desired_dma | |
1262 | (viodev)); | |
0645bab7 RJ |
1263 | if (need_restart) { |
1264 | return ibmveth_open(adapter->netdev); | |
1265 | } | |
860f242e | 1266 | return 0; |
b6d35182 | 1267 | } |
b6d35182 | 1268 | } |
0645bab7 RJ |
1269 | |
1270 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1271 | return rc; | |
1272 | ||
860f242e | 1273 | return -EINVAL; |
1da177e4 LT |
1274 | } |
1275 | ||
6b422374 SL |
1276 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1277 | static void ibmveth_poll_controller(struct net_device *dev) | |
1278 | { | |
4cf1653a | 1279 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1280 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1281 | } |
1282 | #endif | |
1283 | ||
1096d63d RJ |
1284 | /** |
1285 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1286 | * | |
1287 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1288 | * | |
1289 | * Return value: | |
1290 | * Number of bytes of IO data the driver will need to perform well. | |
1291 | */ | |
1292 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1293 | { | |
1294 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1295 | struct ibmveth_adapter *adapter; | |
1296 | unsigned long ret; | |
1297 | int i; | |
1298 | int rxqentries = 1; | |
1299 | ||
1300 | /* netdev inits at probe time along with the structures we need below*/ | |
1301 | if (netdev == NULL) | |
1302 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1303 | ||
1304 | adapter = netdev_priv(netdev); | |
1305 | ||
1306 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1307 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1308 | ||
1309 | for (i = 0; i < IbmVethNumBufferPools; i++) { | |
1310 | /* add the size of the active receive buffers */ | |
1311 | if (adapter->rx_buff_pool[i].active) | |
1312 | ret += | |
1313 | adapter->rx_buff_pool[i].size * | |
1314 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1315 | buff_size); | |
1316 | rxqentries += adapter->rx_buff_pool[i].size; | |
1317 | } | |
1318 | /* add the size of the receive queue entries */ | |
1319 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1320 | ||
1321 | return ret; | |
1322 | } | |
1323 | ||
e186d174 AB |
1324 | static const struct net_device_ops ibmveth_netdev_ops = { |
1325 | .ndo_open = ibmveth_open, | |
1326 | .ndo_stop = ibmveth_close, | |
1327 | .ndo_start_xmit = ibmveth_start_xmit, | |
1328 | .ndo_set_multicast_list = ibmveth_set_multicast_list, | |
1329 | .ndo_do_ioctl = ibmveth_ioctl, | |
1330 | .ndo_change_mtu = ibmveth_change_mtu, | |
1331 | .ndo_validate_addr = eth_validate_addr, | |
1332 | .ndo_set_mac_address = eth_mac_addr, | |
1333 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1334 | .ndo_poll_controller = ibmveth_poll_controller, | |
1335 | #endif | |
1336 | }; | |
1337 | ||
1da177e4 LT |
1338 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1339 | { | |
b6d35182 | 1340 | int rc, i; |
1da177e4 | 1341 | struct net_device *netdev; |
9dc83afd | 1342 | struct ibmveth_adapter *adapter; |
1da177e4 LT |
1343 | |
1344 | unsigned char *mac_addr_p; | |
1345 | unsigned int *mcastFilterSize_p; | |
1346 | ||
1347 | ||
d7fbeba6 | 1348 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1349 | dev->unit_address); |
1350 | ||
493a684a ME |
1351 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1352 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1353 | if(!mac_addr_p) { |
1354 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1355 | "attribute\n", __FILE__, __LINE__); | |
1356 | return 0; | |
1357 | } | |
d7fbeba6 | 1358 | |
493a684a ME |
1359 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1360 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1361 | if(!mcastFilterSize_p) { |
1362 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1363 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1364 | __FILE__, __LINE__); | |
1365 | return 0; | |
1366 | } | |
d7fbeba6 | 1367 | |
1da177e4 LT |
1368 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1369 | ||
1370 | if(!netdev) | |
1371 | return -ENOMEM; | |
1372 | ||
4cf1653a | 1373 | adapter = netdev_priv(netdev); |
c7ae011d | 1374 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1375 | |
1376 | adapter->vdev = dev; | |
1377 | adapter->netdev = netdev; | |
1378 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1379 | adapter->pool_config = 0; |
d7fbeba6 | 1380 | |
bea3348e SH |
1381 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1382 | ||
1da177e4 | 1383 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1384 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1385 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1386 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1387 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1388 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1389 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1390 | ||
1391 | if ((*mac_addr_p & 0x3) != 0x02) | |
1392 | mac_addr_p += 2; | |
1393 | ||
1394 | adapter->mac_addr = 0; | |
1395 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1396 | ||
1da177e4 | 1397 | netdev->irq = dev->irq; |
e186d174 AB |
1398 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1399 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1400 | SET_NETDEV_DEV(netdev, &dev->dev); |
6e8ab30e | 1401 | netdev->features |= NETIF_F_SG; |
1da177e4 | 1402 | |
d44b5e07 | 1403 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1404 | |
860f242e SL |
1405 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1406 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
8dde2a96 GKH |
1407 | int error; |
1408 | ||
d7fbeba6 JG |
1409 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1410 | pool_count[i], pool_size[i], | |
860f242e | 1411 | pool_active[i]); |
8dde2a96 GKH |
1412 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1413 | &dev->dev.kobj, "pool%d", i); | |
1414 | if (!error) | |
1415 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1416 | } |
1da177e4 LT |
1417 | |
1418 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1419 | ||
1da177e4 LT |
1420 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1421 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1422 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1423 | ||
1da177e4 LT |
1424 | ibmveth_debug_printk("registering netdev...\n"); |
1425 | ||
bc4c6f54 | 1426 | ibmveth_set_csum_offload(netdev, 1, ibmveth_set_tx_csum_flags); |
f4ff2872 | 1427 | |
1da177e4 LT |
1428 | rc = register_netdev(netdev); |
1429 | ||
1430 | if(rc) { | |
1431 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1432 | free_netdev(netdev); | |
1433 | return rc; | |
1434 | } | |
1435 | ||
1436 | ibmveth_debug_printk("registered\n"); | |
1437 | ||
1438 | ibmveth_proc_register_adapter(adapter); | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1444 | { | |
c7ae011d | 1445 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1446 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1447 | int i; |
1448 | ||
1449 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
c10997f6 | 1450 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1451 | |
1452 | unregister_netdev(netdev); | |
1453 | ||
1454 | ibmveth_proc_unregister_adapter(adapter); | |
1455 | ||
1456 | free_netdev(netdev); | |
1096d63d RJ |
1457 | dev_set_drvdata(&dev->dev, NULL); |
1458 | ||
1da177e4 LT |
1459 | return 0; |
1460 | } | |
1461 | ||
1462 | #ifdef CONFIG_PROC_FS | |
1463 | static void ibmveth_proc_register_driver(void) | |
1464 | { | |
457c4cbc | 1465 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 | 1466 | if (ibmveth_proc_dir) { |
1da177e4 LT |
1467 | } |
1468 | } | |
1469 | ||
1470 | static void ibmveth_proc_unregister_driver(void) | |
1471 | { | |
457c4cbc | 1472 | remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1473 | } |
1474 | ||
1119d577 | 1475 | static int ibmveth_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1476 | { |
1477 | struct ibmveth_adapter *adapter = seq->private; | |
3a6d54c5 JP |
1478 | char *current_mac = (char *) adapter->netdev->dev_addr; |
1479 | char *firmware_mac = (char *) &adapter->mac_addr; | |
1da177e4 LT |
1480 | |
1481 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1482 | |
1da177e4 | 1483 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
e174961c JB |
1484 | seq_printf(seq, "Current MAC: %pM\n", current_mac); |
1485 | seq_printf(seq, "Firmware MAC: %pM\n", firmware_mac); | |
d7fbeba6 | 1486 | |
1da177e4 | 1487 | seq_printf(seq, "\nAdapter Statistics:\n"); |
a1c5a893 SR |
1488 | seq_printf(seq, " TX: vio_map_single failres: %lld\n", adapter->tx_map_failed); |
1489 | seq_printf(seq, " send failures: %lld\n", adapter->tx_send_failed); | |
1490 | seq_printf(seq, " RX: replenish task cycles: %lld\n", adapter->replenish_task_cycles); | |
1491 | seq_printf(seq, " alloc_skb_failures: %lld\n", adapter->replenish_no_mem); | |
1492 | seq_printf(seq, " add buffer failures: %lld\n", adapter->replenish_add_buff_failure); | |
1493 | seq_printf(seq, " invalid buffers: %lld\n", adapter->rx_invalid_buffer); | |
1494 | seq_printf(seq, " no buffers: %lld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1495 | |
1da177e4 LT |
1496 | return 0; |
1497 | } | |
1da177e4 LT |
1498 | |
1499 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1500 | { | |
1119d577 | 1501 | return single_open(file, ibmveth_show, PDE(inode)->data); |
1da177e4 LT |
1502 | } |
1503 | ||
d54b1fdb | 1504 | static const struct file_operations ibmveth_proc_fops = { |
1da177e4 LT |
1505 | .owner = THIS_MODULE, |
1506 | .open = ibmveth_proc_open, | |
1507 | .read = seq_read, | |
1508 | .llseek = seq_lseek, | |
1119d577 | 1509 | .release = single_release, |
1da177e4 LT |
1510 | }; |
1511 | ||
1512 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1513 | { | |
1514 | struct proc_dir_entry *entry; | |
1515 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1516 | char u_addr[10]; |
1517 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
a95609cb DL |
1518 | entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir, |
1519 | &ibmveth_proc_fops, adapter); | |
1520 | if (!entry) | |
1da177e4 | 1521 | ibmveth_error_printk("Cannot create adapter proc entry"); |
1da177e4 | 1522 | } |
1da177e4 LT |
1523 | } |
1524 | ||
1525 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1526 | { | |
1527 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1528 | char u_addr[10]; |
1529 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1530 | remove_proc_entry(u_addr, ibmveth_proc_dir); | |
1da177e4 LT |
1531 | } |
1532 | } | |
1533 | ||
1534 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1535 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1536 | { |
1537 | } | |
1538 | ||
d7fbeba6 | 1539 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1540 | { |
1541 | } | |
1542 | static void ibmveth_proc_register_driver(void) | |
1543 | { | |
1544 | } | |
1545 | ||
1546 | static void ibmveth_proc_unregister_driver(void) | |
1547 | { | |
1548 | } | |
1549 | #endif /* CONFIG_PROC_FS */ | |
1550 | ||
860f242e SL |
1551 | static struct attribute veth_active_attr; |
1552 | static struct attribute veth_num_attr; | |
1553 | static struct attribute veth_size_attr; | |
1554 | ||
1555 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1556 | struct attribute * attr, char * buf) | |
1557 | { | |
d7fbeba6 | 1558 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1559 | struct ibmveth_buff_pool, |
1560 | kobj); | |
1561 | ||
1562 | if (attr == &veth_active_attr) | |
1563 | return sprintf(buf, "%d\n", pool->active); | |
1564 | else if (attr == &veth_num_attr) | |
1565 | return sprintf(buf, "%d\n", pool->size); | |
1566 | else if (attr == &veth_size_attr) | |
1567 | return sprintf(buf, "%d\n", pool->buff_size); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1572 | const char * buf, size_t count) | |
1573 | { | |
d7fbeba6 | 1574 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1575 | struct ibmveth_buff_pool, |
1576 | kobj); | |
c7ae011d GKH |
1577 | struct net_device *netdev = dev_get_drvdata( |
1578 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1579 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1580 | long value = simple_strtol(buf, NULL, 10); |
1581 | long rc; | |
1582 | ||
1583 | if (attr == &veth_active_attr) { | |
1584 | if (value && !pool->active) { | |
4aa9c93e BK |
1585 | if (netif_running(netdev)) { |
1586 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1587 | ibmveth_error_printk("unable to alloc pool\n"); | |
1588 | return -ENOMEM; | |
1589 | } | |
1590 | pool->active = 1; | |
1591 | adapter->pool_config = 1; | |
1592 | ibmveth_close(netdev); | |
1593 | adapter->pool_config = 0; | |
1594 | if ((rc = ibmveth_open(netdev))) | |
1595 | return rc; | |
1596 | } else | |
1597 | pool->active = 1; | |
860f242e SL |
1598 | } else if (!value && pool->active) { |
1599 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1600 | int i; | |
1601 | /* Make sure there is a buffer pool with buffers that | |
1602 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1603 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1604 | if (pool == &adapter->rx_buff_pool[i]) |
1605 | continue; | |
1606 | if (!adapter->rx_buff_pool[i].active) | |
1607 | continue; | |
76b9cfcc BK |
1608 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1609 | break; | |
860f242e | 1610 | } |
76b9cfcc BK |
1611 | |
1612 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1613 | ibmveth_error_printk("no active pool >= MTU\n"); |
1614 | return -EPERM; | |
1615 | } | |
76b9cfcc | 1616 | |
76b9cfcc BK |
1617 | if (netif_running(netdev)) { |
1618 | adapter->pool_config = 1; | |
1619 | ibmveth_close(netdev); | |
ea866e65 | 1620 | pool->active = 0; |
76b9cfcc BK |
1621 | adapter->pool_config = 0; |
1622 | if ((rc = ibmveth_open(netdev))) | |
1623 | return rc; | |
1624 | } | |
ea866e65 | 1625 | pool->active = 0; |
860f242e SL |
1626 | } |
1627 | } else if (attr == &veth_num_attr) { | |
1628 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1629 | return -EINVAL; | |
1630 | else { | |
4aa9c93e BK |
1631 | if (netif_running(netdev)) { |
1632 | adapter->pool_config = 1; | |
1633 | ibmveth_close(netdev); | |
1634 | adapter->pool_config = 0; | |
1635 | pool->size = value; | |
1636 | if ((rc = ibmveth_open(netdev))) | |
1637 | return rc; | |
1638 | } else | |
1639 | pool->size = value; | |
860f242e SL |
1640 | } |
1641 | } else if (attr == &veth_size_attr) { | |
1642 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1643 | return -EINVAL; | |
1644 | else { | |
4aa9c93e BK |
1645 | if (netif_running(netdev)) { |
1646 | adapter->pool_config = 1; | |
1647 | ibmveth_close(netdev); | |
1648 | adapter->pool_config = 0; | |
1649 | pool->buff_size = value; | |
1650 | if ((rc = ibmveth_open(netdev))) | |
1651 | return rc; | |
1652 | } else | |
1653 | pool->buff_size = value; | |
860f242e SL |
1654 | } |
1655 | } | |
1656 | ||
1657 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1658 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1659 | return count; |
1660 | } | |
1661 | ||
1662 | ||
1663 | #define ATTR(_name, _mode) \ | |
1664 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1665 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1666 | }; |
1667 | ||
1668 | static ATTR(active, 0644); | |
1669 | static ATTR(num, 0644); | |
1670 | static ATTR(size, 0644); | |
1671 | ||
1672 | static struct attribute * veth_pool_attrs[] = { | |
1673 | &veth_active_attr, | |
1674 | &veth_num_attr, | |
1675 | &veth_size_attr, | |
1676 | NULL, | |
1677 | }; | |
1678 | ||
52cf25d0 | 1679 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1680 | .show = veth_pool_show, |
1681 | .store = veth_pool_store, | |
1682 | }; | |
1683 | ||
1684 | static struct kobj_type ktype_veth_pool = { | |
1685 | .release = NULL, | |
1686 | .sysfs_ops = &veth_pool_ops, | |
1687 | .default_attrs = veth_pool_attrs, | |
1688 | }; | |
1689 | ||
e7a3af5d BK |
1690 | static int ibmveth_resume(struct device *dev) |
1691 | { | |
1692 | struct net_device *netdev = dev_get_drvdata(dev); | |
1693 | ibmveth_interrupt(netdev->irq, netdev); | |
1694 | return 0; | |
1695 | } | |
860f242e | 1696 | |
1da177e4 LT |
1697 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1698 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1699 | { "", "" } |
1da177e4 | 1700 | }; |
1da177e4 LT |
1701 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1702 | ||
e7a3af5d BK |
1703 | static struct dev_pm_ops ibmveth_pm_ops = { |
1704 | .resume = ibmveth_resume | |
1705 | }; | |
1706 | ||
1da177e4 | 1707 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1708 | .id_table = ibmveth_device_table, |
1709 | .probe = ibmveth_probe, | |
1710 | .remove = ibmveth_remove, | |
1096d63d | 1711 | .get_desired_dma = ibmveth_get_desired_dma, |
6fdf5392 SR |
1712 | .driver = { |
1713 | .name = ibmveth_driver_name, | |
915124d8 | 1714 | .owner = THIS_MODULE, |
e7a3af5d | 1715 | .pm = &ibmveth_pm_ops, |
6fdf5392 | 1716 | } |
1da177e4 LT |
1717 | }; |
1718 | ||
1719 | static int __init ibmveth_module_init(void) | |
1720 | { | |
1721 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1722 | ||
1723 | ibmveth_proc_register_driver(); | |
1724 | ||
1725 | return vio_register_driver(&ibmveth_driver); | |
1726 | } | |
1727 | ||
1728 | static void __exit ibmveth_module_exit(void) | |
1729 | { | |
1730 | vio_unregister_driver(&ibmveth_driver); | |
1731 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1732 | } |
1da177e4 LT |
1733 | |
1734 | module_init(ibmveth_module_init); | |
1735 | module_exit(ibmveth_module_exit); |