Commit | Line | Data |
---|---|---|
1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
f148f61d | 2 | /* |
9d348af4 | 3 | * IBM Power Virtual Ethernet Device Driver |
f148f61d | 4 | * |
9d348af4 SL |
5 | * Copyright (C) IBM Corporation, 2003, 2010 |
6 | * | |
7 | * Authors: Dave Larson <larson1@us.ibm.com> | |
8 | * Santiago Leon <santil@linux.vnet.ibm.com> | |
9 | * Brian King <brking@linux.vnet.ibm.com> | |
10 | * Robert Jennings <rcj@linux.vnet.ibm.com> | |
11 | * Anton Blanchard <anton@au.ibm.com> | |
f148f61d | 12 | */ |
1da177e4 | 13 | |
1da177e4 | 14 | #include <linux/module.h> |
1da177e4 LT |
15 | #include <linux/types.h> |
16 | #include <linux/errno.h> | |
1da177e4 LT |
17 | #include <linux/dma-mapping.h> |
18 | #include <linux/kernel.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/init.h> | |
a6b7a407 | 23 | #include <linux/interrupt.h> |
1da177e4 | 24 | #include <linux/mm.h> |
e7a3af5d | 25 | #include <linux/pm.h> |
1da177e4 | 26 | #include <linux/ethtool.h> |
f4ff2872 BK |
27 | #include <linux/in.h> |
28 | #include <linux/ip.h> | |
ab78df75 | 29 | #include <linux/ipv6.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
1da177e4 | 31 | #include <asm/hvcall.h> |
60063497 | 32 | #include <linux/atomic.h> |
1da177e4 | 33 | #include <asm/vio.h> |
1096d63d | 34 | #include <asm/iommu.h> |
1096d63d | 35 | #include <asm/firmware.h> |
66aa0678 SK |
36 | #include <net/tcp.h> |
37 | #include <net/ip6_checksum.h> | |
1da177e4 LT |
38 | |
39 | #include "ibmveth.h" | |
40 | ||
7d12e780 | 41 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 42 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 43 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
e295fe83 | 44 | |
860f242e | 45 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 46 | |
1096d63d | 47 | |
1da177e4 | 48 | static const char ibmveth_driver_name[] = "ibmveth"; |
9d348af4 | 49 | static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; |
7b596738 | 50 | #define ibmveth_driver_version "1.06" |
1da177e4 | 51 | |
9d348af4 SL |
52 | MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>"); |
53 | MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); | |
1da177e4 LT |
54 | MODULE_LICENSE("GPL"); |
55 | MODULE_VERSION(ibmveth_driver_version); | |
56 | ||
c08cc3cc SL |
57 | static unsigned int tx_copybreak __read_mostly = 128; |
58 | module_param(tx_copybreak, uint, 0644); | |
59 | MODULE_PARM_DESC(tx_copybreak, | |
60 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
61 | ||
8d86c61a SL |
62 | static unsigned int rx_copybreak __read_mostly = 128; |
63 | module_param(rx_copybreak, uint, 0644); | |
64 | MODULE_PARM_DESC(rx_copybreak, | |
65 | "Maximum size of packet that is copied to a new buffer on receive"); | |
66 | ||
0c26b677 SL |
67 | static unsigned int rx_flush __read_mostly = 0; |
68 | module_param(rx_flush, uint, 0644); | |
69 | MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); | |
70 | ||
07e6a97d | 71 | static bool old_large_send __read_mostly; |
d3757ba4 | 72 | module_param(old_large_send, bool, 0444); |
07e6a97d TF |
73 | MODULE_PARM_DESC(old_large_send, |
74 | "Use old large send method on firmware that supports the new method"); | |
75 | ||
ddbb4de9 BK |
76 | struct ibmveth_stat { |
77 | char name[ETH_GSTRING_LEN]; | |
78 | int offset; | |
79 | }; | |
80 | ||
81 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
82 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
83 | ||
a0cfa79f | 84 | static struct ibmveth_stat ibmveth_stats[] = { |
ddbb4de9 BK |
85 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, |
86 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
f148f61d SL |
87 | { "replenish_add_buff_failure", |
88 | IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
89 | { "replenish_add_buff_success", | |
90 | IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
ddbb4de9 BK |
91 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, |
92 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
93 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
94 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
ab78df75 SL |
95 | { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, |
96 | { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, | |
8641dd85 | 97 | { "tx_large_packets", IBMVETH_STAT_OFF(tx_large_packets) }, |
07e6a97d TF |
98 | { "rx_large_packets", IBMVETH_STAT_OFF(rx_large_packets) }, |
99 | { "fw_enabled_large_send", IBMVETH_STAT_OFF(fw_large_send_support) } | |
ddbb4de9 BK |
100 | }; |
101 | ||
1da177e4 | 102 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
103 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
104 | { | |
0b536be7 | 105 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off); |
79ef4a4d BK |
106 | } |
107 | ||
108 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
109 | { | |
f148f61d SL |
110 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> |
111 | IBMVETH_RXQ_TOGGLE_SHIFT; | |
79ef4a4d BK |
112 | } |
113 | ||
1da177e4 LT |
114 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
115 | { | |
f148f61d | 116 | return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; |
1da177e4 LT |
117 | } |
118 | ||
119 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
120 | { | |
f148f61d | 121 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; |
1da177e4 LT |
122 | } |
123 | ||
124 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
125 | { | |
f148f61d | 126 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; |
1da177e4 LT |
127 | } |
128 | ||
7b596738 TF |
129 | static inline int ibmveth_rxq_large_packet(struct ibmveth_adapter *adapter) |
130 | { | |
131 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_LRG_PKT; | |
132 | } | |
133 | ||
1da177e4 LT |
134 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) |
135 | { | |
0b536be7 | 136 | return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); |
1da177e4 LT |
137 | } |
138 | ||
f4ff2872 BK |
139 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
140 | { | |
f148f61d | 141 | return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; |
f4ff2872 BK |
142 | } |
143 | ||
10c2aba8 NC |
144 | static unsigned int ibmveth_real_max_tx_queues(void) |
145 | { | |
146 | unsigned int n_cpu = num_online_cpus(); | |
147 | ||
148 | return min(n_cpu, IBMVETH_MAX_QUEUES); | |
149 | } | |
150 | ||
1da177e4 | 151 | /* setup the initial settings for a buffer pool */ |
f148f61d SL |
152 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, |
153 | u32 pool_index, u32 pool_size, | |
154 | u32 buff_size, u32 pool_active) | |
1da177e4 LT |
155 | { |
156 | pool->size = pool_size; | |
157 | pool->index = pool_index; | |
158 | pool->buff_size = buff_size; | |
c033a6d1 | 159 | pool->threshold = pool_size * 7 / 8; |
860f242e | 160 | pool->active = pool_active; |
1da177e4 LT |
161 | } |
162 | ||
163 | /* allocate and setup an buffer pool - called during open */ | |
164 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
165 | { | |
166 | int i; | |
167 | ||
6da2ec56 | 168 | pool->free_map = kmalloc_array(pool->size, sizeof(u16), GFP_KERNEL); |
1da177e4 | 169 | |
f148f61d | 170 | if (!pool->free_map) |
1da177e4 | 171 | return -1; |
1da177e4 | 172 | |
076ef440 | 173 | pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL); |
f148f61d | 174 | if (!pool->dma_addr) { |
1da177e4 LT |
175 | kfree(pool->free_map); |
176 | pool->free_map = NULL; | |
177 | return -1; | |
178 | } | |
179 | ||
a05abcb5 | 180 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 | 181 | |
f148f61d | 182 | if (!pool->skbuff) { |
1da177e4 LT |
183 | kfree(pool->dma_addr); |
184 | pool->dma_addr = NULL; | |
185 | ||
186 | kfree(pool->free_map); | |
187 | pool->free_map = NULL; | |
188 | return -1; | |
189 | } | |
190 | ||
f148f61d | 191 | for (i = 0; i < pool->size; ++i) |
1da177e4 | 192 | pool->free_map[i] = i; |
1da177e4 LT |
193 | |
194 | atomic_set(&pool->available, 0); | |
195 | pool->producer_index = 0; | |
196 | pool->consumer_index = 0; | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
0c26b677 SL |
201 | static inline void ibmveth_flush_buffer(void *addr, unsigned long length) |
202 | { | |
203 | unsigned long offset; | |
204 | ||
205 | for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) | |
bfedba3b | 206 | asm("dcbf %0,%1,1" :: "b" (addr), "r" (offset)); |
0c26b677 SL |
207 | } |
208 | ||
1da177e4 LT |
209 | /* replenish the buffers for a pool. note that we don't need to |
210 | * skb_reserve these since they are used for incoming... | |
211 | */ | |
f148f61d SL |
212 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, |
213 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
214 | { |
215 | u32 i; | |
216 | u32 count = pool->size - atomic_read(&pool->available); | |
217 | u32 buffers_added = 0; | |
1096d63d RJ |
218 | struct sk_buff *skb; |
219 | unsigned int free_index, index; | |
220 | u64 correlator; | |
221 | unsigned long lpar_rc; | |
222 | dma_addr_t dma_addr; | |
1da177e4 LT |
223 | |
224 | mb(); | |
225 | ||
f148f61d | 226 | for (i = 0; i < count; ++i) { |
1da177e4 | 227 | union ibmveth_buf_desc desc; |
1da177e4 | 228 | |
003212cc | 229 | skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); |
1da177e4 | 230 | |
f148f61d | 231 | if (!skb) { |
c43ced18 SL |
232 | netdev_dbg(adapter->netdev, |
233 | "replenish: unable to allocate skb\n"); | |
1da177e4 LT |
234 | adapter->replenish_no_mem++; |
235 | break; | |
236 | } | |
237 | ||
047a66d4 | 238 | free_index = pool->consumer_index; |
a613f581 SL |
239 | pool->consumer_index++; |
240 | if (pool->consumer_index >= pool->size) | |
241 | pool->consumer_index = 0; | |
1da177e4 | 242 | index = pool->free_map[free_index]; |
d7fbeba6 | 243 | |
6485911a SL |
244 | BUG_ON(index == IBM_VETH_INVALID_MAP); |
245 | BUG_ON(pool->skbuff[index] != NULL); | |
1da177e4 LT |
246 | |
247 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
248 | pool->buff_size, DMA_FROM_DEVICE); | |
249 | ||
c713e7cb | 250 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
251 | goto failure; |
252 | ||
1da177e4 LT |
253 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
254 | pool->dma_addr[index] = dma_addr; | |
255 | pool->skbuff[index] = skb; | |
256 | ||
257 | correlator = ((u64)pool->index << 32) | index; | |
f148f61d | 258 | *(u64 *)skb->data = correlator; |
1da177e4 | 259 | |
79ef4a4d | 260 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 261 | desc.fields.address = dma_addr; |
1da177e4 | 262 | |
0c26b677 SL |
263 | if (rx_flush) { |
264 | unsigned int len = min(pool->buff_size, | |
265 | adapter->netdev->mtu + | |
266 | IBMVETH_BUFF_OH); | |
267 | ibmveth_flush_buffer(skb->data, len); | |
268 | } | |
f148f61d SL |
269 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, |
270 | desc.desc); | |
d7fbeba6 | 271 | |
f148f61d | 272 | if (lpar_rc != H_SUCCESS) { |
1096d63d | 273 | goto failure; |
f148f61d | 274 | } else { |
1da177e4 LT |
275 | buffers_added++; |
276 | adapter->replenish_add_buff_success++; | |
277 | } | |
278 | } | |
d7fbeba6 | 279 | |
1096d63d RJ |
280 | mb(); |
281 | atomic_add(buffers_added, &(pool->available)); | |
282 | return; | |
283 | ||
284 | failure: | |
285 | pool->free_map[free_index] = index; | |
286 | pool->skbuff[index] = NULL; | |
287 | if (pool->consumer_index == 0) | |
288 | pool->consumer_index = pool->size - 1; | |
289 | else | |
290 | pool->consumer_index--; | |
c713e7cb | 291 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
292 | dma_unmap_single(&adapter->vdev->dev, |
293 | pool->dma_addr[index], pool->buff_size, | |
294 | DMA_FROM_DEVICE); | |
295 | dev_kfree_skb_any(skb); | |
296 | adapter->replenish_add_buff_failure++; | |
297 | ||
1da177e4 LT |
298 | mb(); |
299 | atomic_add(buffers_added, &(pool->available)); | |
300 | } | |
301 | ||
cbd52281 AB |
302 | /* |
303 | * The final 8 bytes of the buffer list is a counter of frames dropped | |
304 | * because there was not a buffer in the buffer list capable of holding | |
305 | * the frame. | |
306 | */ | |
307 | static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter) | |
308 | { | |
309 | __be64 *p = adapter->buffer_list_addr + 4096 - 8; | |
310 | ||
311 | adapter->rx_no_buffer = be64_to_cpup(p); | |
312 | } | |
313 | ||
e2adbcb4 | 314 | /* replenish routine */ |
d7fbeba6 | 315 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 316 | { |
b6d35182 SL |
317 | int i; |
318 | ||
1da177e4 LT |
319 | adapter->replenish_task_cycles++; |
320 | ||
517e80e6 | 321 | for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { |
c033a6d1 SL |
322 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; |
323 | ||
324 | if (pool->active && | |
325 | (atomic_read(&pool->available) < pool->threshold)) | |
326 | ibmveth_replenish_buffer_pool(adapter, pool); | |
327 | } | |
1da177e4 | 328 | |
cbd52281 | 329 | ibmveth_update_rx_no_buffer(adapter); |
1da177e4 LT |
330 | } |
331 | ||
332 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
f148f61d SL |
333 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, |
334 | struct ibmveth_buff_pool *pool) | |
1da177e4 LT |
335 | { |
336 | int i; | |
337 | ||
b4558ea9 JJ |
338 | kfree(pool->free_map); |
339 | pool->free_map = NULL; | |
1da177e4 | 340 | |
f148f61d SL |
341 | if (pool->skbuff && pool->dma_addr) { |
342 | for (i = 0; i < pool->size; ++i) { | |
1da177e4 | 343 | struct sk_buff *skb = pool->skbuff[i]; |
f148f61d | 344 | if (skb) { |
1da177e4 LT |
345 | dma_unmap_single(&adapter->vdev->dev, |
346 | pool->dma_addr[i], | |
347 | pool->buff_size, | |
348 | DMA_FROM_DEVICE); | |
349 | dev_kfree_skb_any(skb); | |
350 | pool->skbuff[i] = NULL; | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
f148f61d | 355 | if (pool->dma_addr) { |
1da177e4 LT |
356 | kfree(pool->dma_addr); |
357 | pool->dma_addr = NULL; | |
358 | } | |
359 | ||
f148f61d | 360 | if (pool->skbuff) { |
1da177e4 LT |
361 | kfree(pool->skbuff); |
362 | pool->skbuff = NULL; | |
363 | } | |
364 | } | |
365 | ||
366 | /* remove a buffer from a pool */ | |
f148f61d SL |
367 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, |
368 | u64 correlator) | |
1da177e4 LT |
369 | { |
370 | unsigned int pool = correlator >> 32; | |
371 | unsigned int index = correlator & 0xffffffffUL; | |
372 | unsigned int free_index; | |
373 | struct sk_buff *skb; | |
374 | ||
6485911a SL |
375 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
376 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
377 | |
378 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
379 | ||
6485911a | 380 | BUG_ON(skb == NULL); |
1da177e4 LT |
381 | |
382 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
383 | ||
384 | dma_unmap_single(&adapter->vdev->dev, | |
385 | adapter->rx_buff_pool[pool].dma_addr[index], | |
386 | adapter->rx_buff_pool[pool].buff_size, | |
387 | DMA_FROM_DEVICE); | |
388 | ||
047a66d4 | 389 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
390 | adapter->rx_buff_pool[pool].producer_index++; |
391 | if (adapter->rx_buff_pool[pool].producer_index >= | |
392 | adapter->rx_buff_pool[pool].size) | |
393 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
394 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
395 | ||
396 | mb(); | |
397 | ||
398 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
399 | } | |
400 | ||
401 | /* get the current buffer on the rx queue */ | |
402 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
403 | { | |
404 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
405 | unsigned int pool = correlator >> 32; | |
406 | unsigned int index = correlator & 0xffffffffUL; | |
407 | ||
6485911a SL |
408 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
409 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 LT |
410 | |
411 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
412 | } | |
413 | ||
414 | /* recycle the current buffer on the rx queue */ | |
c6f59d13 | 415 | static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
416 | { |
417 | u32 q_index = adapter->rx_queue.index; | |
418 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
419 | unsigned int pool = correlator >> 32; | |
420 | unsigned int index = correlator & 0xffffffffUL; | |
421 | union ibmveth_buf_desc desc; | |
422 | unsigned long lpar_rc; | |
c6f59d13 | 423 | int ret = 1; |
1da177e4 | 424 | |
6485911a SL |
425 | BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); |
426 | BUG_ON(index >= adapter->rx_buff_pool[pool].size); | |
1da177e4 | 427 | |
f148f61d | 428 | if (!adapter->rx_buff_pool[pool].active) { |
b6d35182 SL |
429 | ibmveth_rxq_harvest_buffer(adapter); |
430 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
c6f59d13 | 431 | goto out; |
b6d35182 SL |
432 | } |
433 | ||
79ef4a4d BK |
434 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
435 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
436 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
437 | ||
438 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 439 | |
f148f61d | 440 | if (lpar_rc != H_SUCCESS) { |
c43ced18 SL |
441 | netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " |
442 | "during recycle rc=%ld", lpar_rc); | |
1da177e4 | 443 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); |
c6f59d13 | 444 | ret = 0; |
1da177e4 LT |
445 | } |
446 | ||
f148f61d | 447 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
448 | adapter->rx_queue.index = 0; |
449 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
450 | } | |
c6f59d13 AB |
451 | |
452 | out: | |
453 | return ret; | |
1da177e4 LT |
454 | } |
455 | ||
493a684a | 456 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
457 | { |
458 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
459 | ||
f148f61d | 460 | if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
1da177e4 LT |
461 | adapter->rx_queue.index = 0; |
462 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
463 | } | |
464 | } | |
465 | ||
10c2aba8 NC |
466 | static void ibmveth_free_tx_ltb(struct ibmveth_adapter *adapter, int idx) |
467 | { | |
468 | dma_unmap_single(&adapter->vdev->dev, adapter->tx_ltb_dma[idx], | |
469 | adapter->tx_ltb_size, DMA_TO_DEVICE); | |
470 | kfree(adapter->tx_ltb_ptr[idx]); | |
471 | adapter->tx_ltb_ptr[idx] = NULL; | |
472 | } | |
473 | ||
474 | static int ibmveth_allocate_tx_ltb(struct ibmveth_adapter *adapter, int idx) | |
475 | { | |
476 | adapter->tx_ltb_ptr[idx] = kzalloc(adapter->tx_ltb_size, | |
477 | GFP_KERNEL); | |
478 | if (!adapter->tx_ltb_ptr[idx]) { | |
479 | netdev_err(adapter->netdev, | |
480 | "unable to allocate tx long term buffer\n"); | |
481 | return -ENOMEM; | |
482 | } | |
483 | adapter->tx_ltb_dma[idx] = dma_map_single(&adapter->vdev->dev, | |
484 | adapter->tx_ltb_ptr[idx], | |
485 | adapter->tx_ltb_size, | |
486 | DMA_TO_DEVICE); | |
487 | if (dma_mapping_error(&adapter->vdev->dev, adapter->tx_ltb_dma[idx])) { | |
488 | netdev_err(adapter->netdev, | |
489 | "unable to DMA map tx long term buffer\n"); | |
490 | kfree(adapter->tx_ltb_ptr[idx]); | |
491 | adapter->tx_ltb_ptr[idx] = NULL; | |
492 | return -ENOMEM; | |
493 | } | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
bbedefcc ME |
498 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
499 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
500 | { | |
501 | int rc, try_again = 1; | |
502 | ||
f148f61d SL |
503 | /* |
504 | * After a kexec the adapter will still be open, so our attempt to | |
505 | * open it will fail. So if we get a failure we free the adapter and | |
506 | * try again, but only once. | |
507 | */ | |
bbedefcc ME |
508 | retry: |
509 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
510 | adapter->buffer_list_dma, rxq_desc.desc, | |
511 | adapter->filter_list_dma, mac_address); | |
512 | ||
513 | if (rc != H_SUCCESS && try_again) { | |
514 | do { | |
515 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
516 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
517 | ||
518 | try_again = 0; | |
519 | goto retry; | |
520 | } | |
521 | ||
522 | return rc; | |
523 | } | |
524 | ||
1da177e4 LT |
525 | static int ibmveth_open(struct net_device *netdev) |
526 | { | |
4cf1653a | 527 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
d746ca95 | 528 | u64 mac_address; |
b6d35182 | 529 | int rxq_entries = 1; |
1da177e4 LT |
530 | unsigned long lpar_rc; |
531 | int rc; | |
532 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 533 | int i; |
8d8bb39b | 534 | struct device *dev; |
1da177e4 | 535 | |
c43ced18 | 536 | netdev_dbg(netdev, "open starting\n"); |
1da177e4 | 537 | |
bea3348e SH |
538 | napi_enable(&adapter->napi); |
539 | ||
517e80e6 | 540 | for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
b6d35182 | 541 | rxq_entries += adapter->rx_buff_pool[i].size; |
d7fbeba6 | 542 | |
d43732ce | 543 | rc = -ENOMEM; |
1da177e4 | 544 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
d43732ce CH |
545 | if (!adapter->buffer_list_addr) { |
546 | netdev_err(netdev, "unable to allocate list pages\n"); | |
547 | goto out; | |
548 | } | |
d7fbeba6 | 549 | |
d43732ce CH |
550 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
551 | if (!adapter->filter_list_addr) { | |
552 | netdev_err(netdev, "unable to allocate filter pages\n"); | |
553 | goto out_free_buffer_list; | |
1da177e4 LT |
554 | } |
555 | ||
d90c92fe SL |
556 | dev = &adapter->vdev->dev; |
557 | ||
f148f61d SL |
558 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
559 | rxq_entries; | |
d90c92fe | 560 | adapter->rx_queue.queue_addr = |
d0320f75 JP |
561 | dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
562 | &adapter->rx_queue.queue_dma, GFP_KERNEL); | |
d43732ce CH |
563 | if (!adapter->rx_queue.queue_addr) |
564 | goto out_free_filter_list; | |
1da177e4 | 565 | |
8d8bb39b | 566 | adapter->buffer_list_dma = dma_map_single(dev, |
1da177e4 | 567 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
d43732ce CH |
568 | if (dma_mapping_error(dev, adapter->buffer_list_dma)) { |
569 | netdev_err(netdev, "unable to map buffer list pages\n"); | |
570 | goto out_free_queue_mem; | |
571 | } | |
572 | ||
8d8bb39b | 573 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 574 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
d43732ce CH |
575 | if (dma_mapping_error(dev, adapter->filter_list_dma)) { |
576 | netdev_err(netdev, "unable to map filter list pages\n"); | |
577 | goto out_unmap_buffer_list; | |
1da177e4 LT |
578 | } |
579 | ||
10c2aba8 NC |
580 | for (i = 0; i < netdev->real_num_tx_queues; i++) { |
581 | if (ibmveth_allocate_tx_ltb(adapter, i)) | |
582 | goto out_free_tx_ltb; | |
d6832ca4 NC |
583 | } |
584 | ||
1da177e4 LT |
585 | adapter->rx_queue.index = 0; |
586 | adapter->rx_queue.num_slots = rxq_entries; | |
587 | adapter->rx_queue.toggle = 1; | |
588 | ||
5c8b3485 | 589 | mac_address = ether_addr_to_u64(netdev->dev_addr); |
1da177e4 | 590 | |
f148f61d SL |
591 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | |
592 | adapter->rx_queue.queue_len; | |
1da177e4 LT |
593 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
594 | ||
c43ced18 SL |
595 | netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); |
596 | netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); | |
597 | netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
1da177e4 | 598 | |
4347ef15 SL |
599 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
600 | ||
bbedefcc | 601 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 602 | |
f148f61d | 603 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
604 | netdev_err(netdev, "h_register_logical_lan failed with %ld\n", |
605 | lpar_rc); | |
606 | netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq " | |
607 | "desc:0x%llx MAC:0x%llx\n", | |
1da177e4 LT |
608 | adapter->buffer_list_dma, |
609 | adapter->filter_list_dma, | |
610 | rxq_desc.desc, | |
611 | mac_address); | |
88426f2a | 612 | rc = -ENONET; |
d43732ce | 613 | goto out_unmap_filter_list; |
1da177e4 LT |
614 | } |
615 | ||
f148f61d SL |
616 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
617 | if (!adapter->rx_buff_pool[i].active) | |
860f242e SL |
618 | continue; |
619 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
21c2dece | 620 | netdev_err(netdev, "unable to alloc pool\n"); |
860f242e | 621 | adapter->rx_buff_pool[i].active = 0; |
88426f2a | 622 | rc = -ENOMEM; |
d43732ce | 623 | goto out_free_buffer_pools; |
860f242e SL |
624 | } |
625 | } | |
626 | ||
c43ced18 | 627 | netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); |
f148f61d SL |
628 | rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, |
629 | netdev); | |
630 | if (rc != 0) { | |
21c2dece SL |
631 | netdev_err(netdev, "unable to request irq 0x%x, rc %d\n", |
632 | netdev->irq, rc); | |
1da177e4 | 633 | do { |
95de86cf BK |
634 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
635 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); | |
1da177e4 | 636 | |
d43732ce | 637 | goto out_free_buffer_pools; |
1da177e4 LT |
638 | } |
639 | ||
d43732ce | 640 | rc = -ENOMEM; |
d43732ce | 641 | |
c43ced18 | 642 | netdev_dbg(netdev, "initial replenish cycle\n"); |
7d12e780 | 643 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 644 | |
d926793c | 645 | netif_tx_start_all_queues(netdev); |
1da177e4 | 646 | |
c43ced18 | 647 | netdev_dbg(netdev, "open complete\n"); |
1da177e4 LT |
648 | |
649 | return 0; | |
88426f2a | 650 | |
d43732ce CH |
651 | out_free_buffer_pools: |
652 | while (--i >= 0) { | |
653 | if (adapter->rx_buff_pool[i].active) | |
654 | ibmveth_free_buffer_pool(adapter, | |
655 | &adapter->rx_buff_pool[i]); | |
656 | } | |
657 | out_unmap_filter_list: | |
658 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
659 | DMA_BIDIRECTIONAL); | |
d6832ca4 | 660 | |
10c2aba8 | 661 | out_free_tx_ltb: |
d926793c | 662 | while (--i >= 0) { |
10c2aba8 | 663 | ibmveth_free_tx_ltb(adapter, i); |
d926793c | 664 | } |
d6832ca4 | 665 | |
d43732ce CH |
666 | out_unmap_buffer_list: |
667 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
668 | DMA_BIDIRECTIONAL); | |
669 | out_free_queue_mem: | |
670 | dma_free_coherent(dev, adapter->rx_queue.queue_len, | |
671 | adapter->rx_queue.queue_addr, | |
672 | adapter->rx_queue.queue_dma); | |
673 | out_free_filter_list: | |
674 | free_page((unsigned long)adapter->filter_list_addr); | |
675 | out_free_buffer_list: | |
676 | free_page((unsigned long)adapter->buffer_list_addr); | |
677 | out: | |
88426f2a DK |
678 | napi_disable(&adapter->napi); |
679 | return rc; | |
1da177e4 LT |
680 | } |
681 | ||
682 | static int ibmveth_close(struct net_device *netdev) | |
683 | { | |
4cf1653a | 684 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
d43732ce | 685 | struct device *dev = &adapter->vdev->dev; |
1da177e4 | 686 | long lpar_rc; |
d43732ce | 687 | int i; |
d7fbeba6 | 688 | |
c43ced18 | 689 | netdev_dbg(netdev, "close starting\n"); |
1da177e4 | 690 | |
bea3348e SH |
691 | napi_disable(&adapter->napi); |
692 | ||
127b7218 | 693 | netif_tx_stop_all_queues(netdev); |
1da177e4 | 694 | |
ee2e6114 | 695 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 696 | |
1da177e4 LT |
697 | do { |
698 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 699 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 700 | |
f148f61d | 701 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
702 | netdev_err(netdev, "h_free_logical_lan failed with %lx, " |
703 | "continuing with close\n", lpar_rc); | |
1da177e4 LT |
704 | } |
705 | ||
ee2e6114 RJ |
706 | free_irq(netdev->irq, netdev); |
707 | ||
cbd52281 | 708 | ibmveth_update_rx_no_buffer(adapter); |
1da177e4 | 709 | |
d43732ce CH |
710 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, |
711 | DMA_BIDIRECTIONAL); | |
712 | free_page((unsigned long)adapter->buffer_list_addr); | |
713 | ||
714 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
715 | DMA_BIDIRECTIONAL); | |
716 | free_page((unsigned long)adapter->filter_list_addr); | |
717 | ||
718 | dma_free_coherent(dev, adapter->rx_queue.queue_len, | |
719 | adapter->rx_queue.queue_addr, | |
720 | adapter->rx_queue.queue_dma); | |
721 | ||
722 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) | |
723 | if (adapter->rx_buff_pool[i].active) | |
724 | ibmveth_free_buffer_pool(adapter, | |
725 | &adapter->rx_buff_pool[i]); | |
726 | ||
10c2aba8 NC |
727 | for (i = 0; i < netdev->real_num_tx_queues; i++) |
728 | ibmveth_free_tx_ltb(adapter, i); | |
1da177e4 | 729 | |
c43ced18 | 730 | netdev_dbg(netdev, "close complete\n"); |
1da177e4 LT |
731 | |
732 | return 0; | |
733 | } | |
734 | ||
9aedc6e2 CF |
735 | static int ibmveth_set_link_ksettings(struct net_device *dev, |
736 | const struct ethtool_link_ksettings *cmd) | |
f148f61d | 737 | { |
9aedc6e2 CF |
738 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
739 | ||
740 | return ethtool_virtdev_set_link_ksettings(dev, cmd, | |
741 | &adapter->speed, | |
742 | &adapter->duplex); | |
743 | } | |
744 | ||
745 | static int ibmveth_get_link_ksettings(struct net_device *dev, | |
746 | struct ethtool_link_ksettings *cmd) | |
747 | { | |
748 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
749 | ||
750 | cmd->base.speed = adapter->speed; | |
751 | cmd->base.duplex = adapter->duplex; | |
752 | cmd->base.port = PORT_OTHER; | |
9ce8c2df | 753 | |
1da177e4 LT |
754 | return 0; |
755 | } | |
756 | ||
9aedc6e2 CF |
757 | static void ibmveth_init_link_settings(struct net_device *dev) |
758 | { | |
759 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
760 | ||
761 | adapter->speed = SPEED_1000; | |
762 | adapter->duplex = DUPLEX_FULL; | |
763 | } | |
764 | ||
f148f61d SL |
765 | static void netdev_get_drvinfo(struct net_device *dev, |
766 | struct ethtool_drvinfo *info) | |
767 | { | |
f029c781 WS |
768 | strscpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
769 | strscpy(info->version, ibmveth_driver_version, sizeof(info->version)); | |
1da177e4 LT |
770 | } |
771 | ||
c8f44aff MM |
772 | static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
773 | netdev_features_t features) | |
5fc7e01c | 774 | { |
b9367bf3 MM |
775 | /* |
776 | * Since the ibmveth firmware interface does not have the | |
777 | * concept of separate tx/rx checksum offload enable, if rx | |
778 | * checksum is disabled we also have to disable tx checksum | |
779 | * offload. Once we disable rx checksum offload, we are no | |
780 | * longer allowed to send tx buffers that are not properly | |
781 | * checksummed. | |
782 | */ | |
5fc7e01c | 783 | |
b9367bf3 | 784 | if (!(features & NETIF_F_RXCSUM)) |
a188222b | 785 | features &= ~NETIF_F_CSUM_MASK; |
5fc7e01c | 786 | |
b9367bf3 | 787 | return features; |
5fc7e01c BK |
788 | } |
789 | ||
b9367bf3 | 790 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data) |
5fc7e01c | 791 | { |
4cf1653a | 792 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 793 | unsigned long set_attr, clr_attr, ret_attr; |
ab78df75 | 794 | unsigned long set_attr6, clr_attr6; |
fb82fd20 | 795 | long ret, ret4, ret6; |
5fc7e01c BK |
796 | int rc1 = 0, rc2 = 0; |
797 | int restart = 0; | |
798 | ||
799 | if (netif_running(dev)) { | |
800 | restart = 1; | |
5fc7e01c | 801 | ibmveth_close(dev); |
5fc7e01c BK |
802 | } |
803 | ||
79ef4a4d BK |
804 | set_attr = 0; |
805 | clr_attr = 0; | |
fb82fd20 AB |
806 | set_attr6 = 0; |
807 | clr_attr6 = 0; | |
5fc7e01c | 808 | |
ab78df75 | 809 | if (data) { |
79ef4a4d | 810 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
811 | set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
812 | } else { | |
79ef4a4d | 813 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
ab78df75 SL |
814 | clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; |
815 | } | |
5fc7e01c | 816 | |
79ef4a4d | 817 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 818 | |
66aa0678 | 819 | if (ret == H_SUCCESS && |
79ef4a4d | 820 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { |
fb82fd20 | 821 | ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
79ef4a4d | 822 | set_attr, &ret_attr); |
5fc7e01c | 823 | |
fb82fd20 | 824 | if (ret4 != H_SUCCESS) { |
21c2dece SL |
825 | netdev_err(dev, "unable to change IPv4 checksum " |
826 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
827 | data, ret4); |
828 | ||
829 | h_illan_attributes(adapter->vdev->unit_address, | |
830 | set_attr, clr_attr, &ret_attr); | |
831 | ||
832 | if (data == 1) | |
833 | dev->features &= ~NETIF_F_IP_CSUM; | |
5fc7e01c | 834 | |
f148f61d | 835 | } else { |
ab78df75 | 836 | adapter->fw_ipv4_csum_support = data; |
f148f61d | 837 | } |
ab78df75 SL |
838 | |
839 | ret6 = h_illan_attributes(adapter->vdev->unit_address, | |
840 | clr_attr6, set_attr6, &ret_attr); | |
841 | ||
842 | if (ret6 != H_SUCCESS) { | |
21c2dece SL |
843 | netdev_err(dev, "unable to change IPv6 checksum " |
844 | "offload settings. %d rc=%ld\n", | |
fb82fd20 AB |
845 | data, ret6); |
846 | ||
847 | h_illan_attributes(adapter->vdev->unit_address, | |
848 | set_attr6, clr_attr6, &ret_attr); | |
849 | ||
850 | if (data == 1) | |
851 | dev->features &= ~NETIF_F_IPV6_CSUM; | |
ab78df75 | 852 | |
ab78df75 SL |
853 | } else |
854 | adapter->fw_ipv6_csum_support = data; | |
855 | ||
fb82fd20 | 856 | if (ret4 == H_SUCCESS || ret6 == H_SUCCESS) |
b9367bf3 | 857 | adapter->rx_csum = data; |
ab78df75 SL |
858 | else |
859 | rc1 = -EIO; | |
5fc7e01c BK |
860 | } else { |
861 | rc1 = -EIO; | |
21c2dece SL |
862 | netdev_err(dev, "unable to change checksum offload settings." |
863 | " %d rc=%ld ret_attr=%lx\n", data, ret, | |
864 | ret_attr); | |
5fc7e01c BK |
865 | } |
866 | ||
867 | if (restart) | |
868 | rc2 = ibmveth_open(dev); | |
869 | ||
870 | return rc1 ? rc1 : rc2; | |
871 | } | |
872 | ||
07e6a97d TF |
873 | static int ibmveth_set_tso(struct net_device *dev, u32 data) |
874 | { | |
875 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
876 | unsigned long set_attr, clr_attr, ret_attr; | |
877 | long ret1, ret2; | |
878 | int rc1 = 0, rc2 = 0; | |
879 | int restart = 0; | |
880 | ||
881 | if (netif_running(dev)) { | |
882 | restart = 1; | |
07e6a97d | 883 | ibmveth_close(dev); |
07e6a97d TF |
884 | } |
885 | ||
886 | set_attr = 0; | |
887 | clr_attr = 0; | |
888 | ||
889 | if (data) | |
890 | set_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; | |
891 | else | |
892 | clr_attr = IBMVETH_ILLAN_LRG_SR_ENABLED; | |
893 | ||
894 | ret1 = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); | |
895 | ||
896 | if (ret1 == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && | |
897 | !old_large_send) { | |
898 | ret2 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
899 | set_attr, &ret_attr); | |
900 | ||
901 | if (ret2 != H_SUCCESS) { | |
902 | netdev_err(dev, "unable to change tso settings. %d rc=%ld\n", | |
903 | data, ret2); | |
904 | ||
905 | h_illan_attributes(adapter->vdev->unit_address, | |
906 | set_attr, clr_attr, &ret_attr); | |
907 | ||
908 | if (data == 1) | |
909 | dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
910 | rc1 = -EIO; | |
911 | ||
912 | } else { | |
913 | adapter->fw_large_send_support = data; | |
914 | adapter->large_send = data; | |
915 | } | |
916 | } else { | |
917 | /* Older firmware version of large send offload does not | |
918 | * support tcp6/ipv6 | |
919 | */ | |
920 | if (data == 1) { | |
921 | dev->features &= ~NETIF_F_TSO6; | |
922 | netdev_info(dev, "TSO feature requires all partitions to have updated driver"); | |
923 | } | |
924 | adapter->large_send = data; | |
925 | } | |
926 | ||
927 | if (restart) | |
928 | rc2 = ibmveth_open(dev); | |
929 | ||
930 | return rc1 ? rc1 : rc2; | |
931 | } | |
932 | ||
c8f44aff MM |
933 | static int ibmveth_set_features(struct net_device *dev, |
934 | netdev_features_t features) | |
5fc7e01c | 935 | { |
4cf1653a | 936 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
b9367bf3 | 937 | int rx_csum = !!(features & NETIF_F_RXCSUM); |
07e6a97d TF |
938 | int large_send = !!(features & (NETIF_F_TSO | NETIF_F_TSO6)); |
939 | int rc1 = 0, rc2 = 0; | |
5fc7e01c | 940 | |
07e6a97d TF |
941 | if (rx_csum != adapter->rx_csum) { |
942 | rc1 = ibmveth_set_csum_offload(dev, rx_csum); | |
943 | if (rc1 && !adapter->rx_csum) | |
944 | dev->features = | |
a188222b TH |
945 | features & ~(NETIF_F_CSUM_MASK | |
946 | NETIF_F_RXCSUM); | |
07e6a97d | 947 | } |
5fc7e01c | 948 | |
07e6a97d TF |
949 | if (large_send != adapter->large_send) { |
950 | rc2 = ibmveth_set_tso(dev, large_send); | |
951 | if (rc2 && !adapter->large_send) | |
952 | dev->features = | |
953 | features & ~(NETIF_F_TSO | NETIF_F_TSO6); | |
954 | } | |
5fc7e01c | 955 | |
07e6a97d | 956 | return rc1 ? rc1 : rc2; |
5fc7e01c BK |
957 | } |
958 | ||
ddbb4de9 BK |
959 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
960 | { | |
961 | int i; | |
962 | ||
963 | if (stringset != ETH_SS_STATS) | |
964 | return; | |
965 | ||
966 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
967 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
968 | } | |
969 | ||
b9f2c044 | 970 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 971 | { |
b9f2c044 JG |
972 | switch (sset) { |
973 | case ETH_SS_STATS: | |
974 | return ARRAY_SIZE(ibmveth_stats); | |
975 | default: | |
976 | return -EOPNOTSUPP; | |
977 | } | |
ddbb4de9 BK |
978 | } |
979 | ||
980 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
981 | struct ethtool_stats *stats, u64 *data) | |
982 | { | |
983 | int i; | |
4cf1653a | 984 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
985 | |
986 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
987 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
988 | } | |
989 | ||
10c2aba8 NC |
990 | static void ibmveth_get_channels(struct net_device *netdev, |
991 | struct ethtool_channels *channels) | |
992 | { | |
993 | channels->max_tx = ibmveth_real_max_tx_queues(); | |
994 | channels->tx_count = netdev->real_num_tx_queues; | |
995 | ||
996 | channels->max_rx = netdev->real_num_rx_queues; | |
997 | channels->rx_count = netdev->real_num_rx_queues; | |
998 | } | |
999 | ||
1000 | static int ibmveth_set_channels(struct net_device *netdev, | |
1001 | struct ethtool_channels *channels) | |
1002 | { | |
1003 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
1004 | unsigned int old = netdev->real_num_tx_queues, | |
1005 | goal = channels->tx_count; | |
1006 | int rc, i; | |
1007 | ||
1008 | /* If ndo_open has not been called yet then don't allocate, just set | |
1009 | * desired netdev_queue's and return | |
1010 | */ | |
1011 | if (!(netdev->flags & IFF_UP)) | |
1012 | return netif_set_real_num_tx_queues(netdev, goal); | |
1013 | ||
1014 | /* We have IBMVETH_MAX_QUEUES netdev_queue's allocated | |
1015 | * but we may need to alloc/free the ltb's. | |
1016 | */ | |
1017 | netif_tx_stop_all_queues(netdev); | |
1018 | ||
1019 | /* Allocate any queue that we need */ | |
1020 | for (i = old; i < goal; i++) { | |
1021 | if (adapter->tx_ltb_ptr[i]) | |
1022 | continue; | |
1023 | ||
1024 | rc = ibmveth_allocate_tx_ltb(adapter, i); | |
1025 | if (!rc) | |
1026 | continue; | |
1027 | ||
1028 | /* if something goes wrong, free everything we just allocated */ | |
1029 | netdev_err(netdev, "Failed to allocate more tx queues, returning to %d queues\n", | |
1030 | old); | |
1031 | goal = old; | |
1032 | old = i; | |
1033 | break; | |
1034 | } | |
1035 | rc = netif_set_real_num_tx_queues(netdev, goal); | |
1036 | if (rc) { | |
1037 | netdev_err(netdev, "Failed to set real tx queues, returning to %d queues\n", | |
1038 | old); | |
1039 | goal = old; | |
1040 | old = i; | |
1041 | } | |
1042 | /* Free any that are no longer needed */ | |
1043 | for (i = old; i > goal; i--) { | |
1044 | if (adapter->tx_ltb_ptr[i - 1]) | |
1045 | ibmveth_free_tx_ltb(adapter, i - 1); | |
1046 | } | |
1047 | ||
1048 | netif_tx_wake_all_queues(netdev); | |
1049 | ||
1050 | return rc; | |
1051 | } | |
1052 | ||
7282d491 | 1053 | static const struct ethtool_ops netdev_ethtool_ops = { |
9aedc6e2 CF |
1054 | .get_drvinfo = netdev_get_drvinfo, |
1055 | .get_link = ethtool_op_get_link, | |
1056 | .get_strings = ibmveth_get_strings, | |
1057 | .get_sset_count = ibmveth_get_sset_count, | |
1058 | .get_ethtool_stats = ibmveth_get_ethtool_stats, | |
1059 | .get_link_ksettings = ibmveth_get_link_ksettings, | |
1060 | .set_link_ksettings = ibmveth_set_link_ksettings, | |
10c2aba8 NC |
1061 | .get_channels = ibmveth_get_channels, |
1062 | .set_channels = ibmveth_set_channels | |
1da177e4 LT |
1063 | }; |
1064 | ||
1065 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
1066 | { | |
1067 | return -EOPNOTSUPP; | |
1068 | } | |
1069 | ||
6e8ab30e | 1070 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
d6832ca4 | 1071 | unsigned long desc, unsigned long mss) |
1da177e4 | 1072 | { |
1da177e4 LT |
1073 | unsigned long correlator; |
1074 | unsigned int retry_count; | |
6e8ab30e SL |
1075 | unsigned long ret; |
1076 | ||
1077 | /* | |
1078 | * The retry count sets a maximum for the number of broadcast and | |
1079 | * multicast destinations within the system. | |
1080 | */ | |
1081 | retry_count = 1024; | |
1082 | correlator = 0; | |
1083 | do { | |
d6832ca4 NC |
1084 | ret = h_send_logical_lan(adapter->vdev->unit_address, desc, |
1085 | correlator, &correlator, mss, | |
1086 | adapter->fw_large_send_support); | |
6e8ab30e SL |
1087 | } while ((ret == H_BUSY) && (retry_count--)); |
1088 | ||
1089 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
21c2dece SL |
1090 | netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " |
1091 | "with rc=%ld\n", ret); | |
6e8ab30e SL |
1092 | return 1; |
1093 | } | |
1094 | ||
1095 | return 0; | |
1096 | } | |
60296d9e | 1097 | |
6f227543 CF |
1098 | static int ibmveth_is_packet_unsupported(struct sk_buff *skb, |
1099 | struct net_device *netdev) | |
1100 | { | |
1101 | struct ethhdr *ether_header; | |
1102 | int ret = 0; | |
1103 | ||
1104 | ether_header = eth_hdr(skb); | |
1105 | ||
1106 | if (ether_addr_equal(ether_header->h_dest, netdev->dev_addr)) { | |
1107 | netdev_dbg(netdev, "veth doesn't support loopback packets, dropping packet.\n"); | |
1108 | netdev->stats.tx_dropped++; | |
1109 | ret = -EOPNOTSUPP; | |
1110 | } | |
1111 | ||
6f227543 CF |
1112 | return ret; |
1113 | } | |
1114 | ||
6e8ab30e SL |
1115 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
1116 | struct net_device *netdev) | |
1117 | { | |
1118 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
d926793c | 1119 | unsigned int desc_flags, total_bytes; |
d6832ca4 | 1120 | union ibmveth_buf_desc desc; |
d926793c | 1121 | int i, queue_num = skb_get_queue_mapping(skb); |
07e6a97d | 1122 | unsigned long mss = 0; |
6e8ab30e | 1123 | |
6f227543 CF |
1124 | if (ibmveth_is_packet_unsupported(skb, netdev)) |
1125 | goto out; | |
6e8ab30e | 1126 | /* veth can't checksum offload UDP */ |
f4ff2872 | 1127 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
ab78df75 SL |
1128 | ((skb->protocol == htons(ETH_P_IP) && |
1129 | ip_hdr(skb)->protocol != IPPROTO_TCP) || | |
1130 | (skb->protocol == htons(ETH_P_IPV6) && | |
1131 | ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && | |
1132 | skb_checksum_help(skb)) { | |
1133 | ||
21c2dece | 1134 | netdev_err(netdev, "tx: failed to checksum packet\n"); |
6e8ab30e | 1135 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
1136 | goto out; |
1137 | } | |
1138 | ||
6e8ab30e SL |
1139 | desc_flags = IBMVETH_BUF_VALID; |
1140 | ||
f4ff2872 | 1141 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
1142 | unsigned char *buf = skb_transport_header(skb) + |
1143 | skb->csum_offset; | |
f4ff2872 | 1144 | |
6e8ab30e | 1145 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
1146 | |
1147 | /* Need to zero out the checksum */ | |
1148 | buf[0] = 0; | |
1149 | buf[1] = 0; | |
66aa0678 SK |
1150 | |
1151 | if (skb_is_gso(skb) && adapter->fw_large_send_support) | |
1152 | desc_flags |= IBMVETH_BUF_LRG_SND; | |
f4ff2872 BK |
1153 | } |
1154 | ||
66aa0678 | 1155 | if (skb->ip_summed == CHECKSUM_PARTIAL && skb_is_gso(skb)) { |
07e6a97d TF |
1156 | if (adapter->fw_large_send_support) { |
1157 | mss = (unsigned long)skb_shinfo(skb)->gso_size; | |
1158 | adapter->tx_large_packets++; | |
1159 | } else if (!skb_is_gso_v6(skb)) { | |
1160 | /* Put -1 in the IP checksum to tell phyp it | |
1161 | * is a largesend packet. Put the mss in | |
1162 | * the TCP checksum. | |
1163 | */ | |
1164 | ip_hdr(skb)->check = 0xffff; | |
1165 | tcp_hdr(skb)->check = | |
1166 | cpu_to_be16(skb_shinfo(skb)->gso_size); | |
1167 | adapter->tx_large_packets++; | |
1168 | } | |
8641dd85 TF |
1169 | } |
1170 | ||
d6832ca4 NC |
1171 | /* Copy header into mapped buffer */ |
1172 | if (unlikely(skb->len > adapter->tx_ltb_size)) { | |
1173 | netdev_err(adapter->netdev, "tx: packet size (%u) exceeds ltb (%u)\n", | |
1174 | skb->len, adapter->tx_ltb_size); | |
1175 | netdev->stats.tx_dropped++; | |
1176 | goto out; | |
1177 | } | |
d926793c | 1178 | memcpy(adapter->tx_ltb_ptr[queue_num], skb->data, skb_headlen(skb)); |
d6832ca4 NC |
1179 | total_bytes = skb_headlen(skb); |
1180 | /* Copy frags into mapped buffers */ | |
1181 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1182 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1183 | ||
d926793c NC |
1184 | memcpy(adapter->tx_ltb_ptr[queue_num] + total_bytes, |
1185 | skb_frag_address_safe(frag), skb_frag_size(frag)); | |
d6832ca4 NC |
1186 | total_bytes += skb_frag_size(frag); |
1187 | } | |
1188 | ||
1189 | if (unlikely(total_bytes != skb->len)) { | |
1190 | netdev_err(adapter->netdev, "tx: incorrect packet len copied into ltb (%u != %u)\n", | |
1191 | skb->len, total_bytes); | |
1192 | netdev->stats.tx_dropped++; | |
1193 | goto out; | |
1194 | } | |
1195 | desc.fields.flags_len = desc_flags | skb->len; | |
d926793c | 1196 | desc.fields.address = adapter->tx_ltb_dma[queue_num]; |
d6832ca4 NC |
1197 | /* finish writing to long_term_buff before VIOS accessing it */ |
1198 | dma_wmb(); | |
1199 | ||
1200 | if (ibmveth_send(adapter, desc.desc, mss)) { | |
6e8ab30e SL |
1201 | adapter->tx_send_failed++; |
1202 | netdev->stats.tx_dropped++; | |
1da177e4 | 1203 | } else { |
6e8ab30e SL |
1204 | netdev->stats.tx_packets++; |
1205 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1206 | } |
1207 | ||
e8cb7eb4 | 1208 | out: |
26faa9d7 | 1209 | dev_consume_skb_any(skb); |
6ed10654 | 1210 | return NETDEV_TX_OK; |
6e8ab30e | 1211 | |
6e8ab30e | 1212 | |
1da177e4 LT |
1213 | } |
1214 | ||
7b596738 TF |
1215 | static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt) |
1216 | { | |
94acf164 | 1217 | struct tcphdr *tcph; |
7b596738 | 1218 | int offset = 0; |
94acf164 | 1219 | int hdr_len; |
7b596738 TF |
1220 | |
1221 | /* only TCP packets will be aggregated */ | |
1222 | if (skb->protocol == htons(ETH_P_IP)) { | |
1223 | struct iphdr *iph = (struct iphdr *)skb->data; | |
1224 | ||
1225 | if (iph->protocol == IPPROTO_TCP) { | |
1226 | offset = iph->ihl * 4; | |
1227 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; | |
1228 | } else { | |
1229 | return; | |
1230 | } | |
1231 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
1232 | struct ipv6hdr *iph6 = (struct ipv6hdr *)skb->data; | |
1233 | ||
1234 | if (iph6->nexthdr == IPPROTO_TCP) { | |
1235 | offset = sizeof(struct ipv6hdr); | |
1236 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; | |
1237 | } else { | |
1238 | return; | |
1239 | } | |
1240 | } else { | |
1241 | return; | |
1242 | } | |
1243 | /* if mss is not set through Large Packet bit/mss in rx buffer, | |
1244 | * expect that the mss will be written to the tcp header checksum. | |
1245 | */ | |
94acf164 | 1246 | tcph = (struct tcphdr *)(skb->data + offset); |
7b596738 TF |
1247 | if (lrg_pkt) { |
1248 | skb_shinfo(skb)->gso_size = mss; | |
1249 | } else if (offset) { | |
7b596738 TF |
1250 | skb_shinfo(skb)->gso_size = ntohs(tcph->check); |
1251 | tcph->check = 0; | |
1252 | } | |
94acf164 TF |
1253 | |
1254 | if (skb_shinfo(skb)->gso_size) { | |
1255 | hdr_len = offset + tcph->doff * 4; | |
1256 | skb_shinfo(skb)->gso_segs = | |
1257 | DIV_ROUND_UP(skb->len - hdr_len, | |
1258 | skb_shinfo(skb)->gso_size); | |
1259 | } | |
7b596738 TF |
1260 | } |
1261 | ||
66aa0678 SK |
1262 | static void ibmveth_rx_csum_helper(struct sk_buff *skb, |
1263 | struct ibmveth_adapter *adapter) | |
1264 | { | |
1265 | struct iphdr *iph = NULL; | |
1266 | struct ipv6hdr *iph6 = NULL; | |
1267 | __be16 skb_proto = 0; | |
1268 | u16 iphlen = 0; | |
1269 | u16 iph_proto = 0; | |
1270 | u16 tcphdrlen = 0; | |
1271 | ||
1272 | skb_proto = be16_to_cpu(skb->protocol); | |
1273 | ||
1274 | if (skb_proto == ETH_P_IP) { | |
1275 | iph = (struct iphdr *)skb->data; | |
1276 | ||
1277 | /* If the IP checksum is not offloaded and if the packet | |
1278 | * is large send, the checksum must be rebuilt. | |
1279 | */ | |
1280 | if (iph->check == 0xffff) { | |
1281 | iph->check = 0; | |
1282 | iph->check = ip_fast_csum((unsigned char *)iph, | |
1283 | iph->ihl); | |
1284 | } | |
1285 | ||
1286 | iphlen = iph->ihl * 4; | |
1287 | iph_proto = iph->protocol; | |
1288 | } else if (skb_proto == ETH_P_IPV6) { | |
1289 | iph6 = (struct ipv6hdr *)skb->data; | |
1290 | iphlen = sizeof(struct ipv6hdr); | |
1291 | iph_proto = iph6->nexthdr; | |
1292 | } | |
1293 | ||
7525de25 DW |
1294 | /* When CSO is enabled the TCP checksum may have be set to NULL by |
1295 | * the sender given that we zeroed out TCP checksum field in | |
1296 | * transmit path (refer ibmveth_start_xmit routine). In this case set | |
1297 | * up CHECKSUM_PARTIAL. If the packet is forwarded, the checksum will | |
1298 | * then be recalculated by the destination NIC (CSO must be enabled | |
1299 | * on the destination NIC). | |
1300 | * | |
1301 | * In an OVS environment, when a flow is not cached, specifically for a | |
1302 | * new TCP connection, the first packet information is passed up to | |
66aa0678 SK |
1303 | * the user space for finding a flow. During this process, OVS computes |
1304 | * checksum on the first packet when CHECKSUM_PARTIAL flag is set. | |
1305 | * | |
51e7a666 | 1306 | * So, re-compute TCP pseudo header checksum. |
66aa0678 | 1307 | */ |
51e7a666 | 1308 | |
7525de25 | 1309 | if (iph_proto == IPPROTO_TCP) { |
66aa0678 | 1310 | struct tcphdr *tcph = (struct tcphdr *)(skb->data + iphlen); |
51e7a666 | 1311 | |
7525de25 DW |
1312 | if (tcph->check == 0x0000) { |
1313 | /* Recompute TCP pseudo header checksum */ | |
51e7a666 DW |
1314 | tcphdrlen = skb->len - iphlen; |
1315 | if (skb_proto == ETH_P_IP) | |
1316 | tcph->check = | |
1317 | ~csum_tcpudp_magic(iph->saddr, | |
1318 | iph->daddr, tcphdrlen, iph_proto, 0); | |
1319 | else if (skb_proto == ETH_P_IPV6) | |
1320 | tcph->check = | |
1321 | ~csum_ipv6_magic(&iph6->saddr, | |
1322 | &iph6->daddr, tcphdrlen, iph_proto, 0); | |
7525de25 DW |
1323 | /* Setup SKB fields for checksum offload */ |
1324 | skb_partial_csum_set(skb, iphlen, | |
1325 | offsetof(struct tcphdr, check)); | |
1326 | skb_reset_network_header(skb); | |
1327 | } | |
66aa0678 SK |
1328 | } |
1329 | } | |
1330 | ||
bea3348e | 1331 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1332 | { |
f148f61d SL |
1333 | struct ibmveth_adapter *adapter = |
1334 | container_of(napi, struct ibmveth_adapter, napi); | |
bea3348e | 1335 | struct net_device *netdev = adapter->netdev; |
1da177e4 | 1336 | int frames_processed = 0; |
1da177e4 | 1337 | unsigned long lpar_rc; |
7b596738 | 1338 | u16 mss = 0; |
1da177e4 | 1339 | |
cb013ea1 | 1340 | while (frames_processed < budget) { |
bea3348e SH |
1341 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1342 | break; | |
1da177e4 | 1343 | |
f89e49e7 | 1344 | smp_rmb(); |
bea3348e SH |
1345 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1346 | wmb(); /* suggested by larson1 */ | |
1347 | adapter->rx_invalid_buffer++; | |
c43ced18 | 1348 | netdev_dbg(netdev, "recycling invalid buffer\n"); |
bea3348e SH |
1349 | ibmveth_rxq_recycle_buffer(adapter); |
1350 | } else { | |
8d86c61a | 1351 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1352 | int length = ibmveth_rxq_frame_length(adapter); |
1353 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 | 1354 | int csum_good = ibmveth_rxq_csum_good(adapter); |
7b596738 | 1355 | int lrg_pkt = ibmveth_rxq_large_packet(adapter); |
413f142c | 1356 | __sum16 iph_check = 0; |
f4ff2872 | 1357 | |
bea3348e | 1358 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1359 | |
7b596738 TF |
1360 | /* if the large packet bit is set in the rx queue |
1361 | * descriptor, the mss will be written by PHYP eight | |
1362 | * bytes from the start of the rx buffer, which is | |
1363 | * skb->data at this stage | |
1364 | */ | |
1365 | if (lrg_pkt) { | |
1366 | __be64 *rxmss = (__be64 *)(skb->data + 8); | |
1367 | ||
1368 | mss = (u16)be64_to_cpu(*rxmss); | |
1369 | } | |
1370 | ||
8d86c61a SL |
1371 | new_skb = NULL; |
1372 | if (length < rx_copybreak) | |
1373 | new_skb = netdev_alloc_skb(netdev, length); | |
1374 | ||
1375 | if (new_skb) { | |
1376 | skb_copy_to_linear_data(new_skb, | |
1377 | skb->data + offset, | |
1378 | length); | |
0c26b677 SL |
1379 | if (rx_flush) |
1380 | ibmveth_flush_buffer(skb->data, | |
1381 | length + offset); | |
c6f59d13 AB |
1382 | if (!ibmveth_rxq_recycle_buffer(adapter)) |
1383 | kfree_skb(skb); | |
8d86c61a | 1384 | skb = new_skb; |
8d86c61a SL |
1385 | } else { |
1386 | ibmveth_rxq_harvest_buffer(adapter); | |
1387 | skb_reserve(skb, offset); | |
1388 | } | |
1da177e4 | 1389 | |
bea3348e SH |
1390 | skb_put(skb, length); |
1391 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1392 | |
413f142c DW |
1393 | /* PHYP without PLSO support places a -1 in the ip |
1394 | * checksum for large send frames. | |
1395 | */ | |
1396 | if (skb->protocol == cpu_to_be16(ETH_P_IP)) { | |
1397 | struct iphdr *iph = (struct iphdr *)skb->data; | |
1398 | ||
1399 | iph_check = iph->check; | |
1400 | } | |
1401 | ||
1402 | if ((length > netdev->mtu + ETH_HLEN) || | |
1403 | lrg_pkt || iph_check == 0xffff) { | |
7b596738 TF |
1404 | ibmveth_rx_mss_helper(skb, mss, lrg_pkt); |
1405 | adapter->rx_large_packets++; | |
1406 | } | |
1407 | ||
5ce9ad81 DW |
1408 | if (csum_good) { |
1409 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1410 | ibmveth_rx_csum_helper(skb, adapter); | |
1411 | } | |
1412 | ||
92ec8279 | 1413 | napi_gro_receive(napi, skb); /* send it up */ |
1da177e4 | 1414 | |
09f75cd7 JG |
1415 | netdev->stats.rx_packets++; |
1416 | netdev->stats.rx_bytes += length; | |
bea3348e | 1417 | frames_processed++; |
1da177e4 | 1418 | } |
cb013ea1 | 1419 | } |
1da177e4 | 1420 | |
e2adbcb4 | 1421 | ibmveth_replenish_task(adapter); |
1da177e4 | 1422 | |
bea3348e | 1423 | if (frames_processed < budget) { |
6ad20165 | 1424 | napi_complete_done(napi, frames_processed); |
4736edc7 | 1425 | |
bea3348e SH |
1426 | /* We think we are done - reenable interrupts, |
1427 | * then check once more to make sure we are done. | |
1428 | */ | |
1429 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1430 | VIO_IRQ_ENABLE); | |
1da177e4 | 1431 | |
6485911a | 1432 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 | 1433 | |
bea3348e | 1434 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1435 | napi_reschedule(napi)) { |
bea3348e SH |
1436 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1437 | VIO_IRQ_DISABLE); | |
bea3348e | 1438 | } |
1da177e4 LT |
1439 | } |
1440 | ||
bea3348e | 1441 | return frames_processed; |
1da177e4 LT |
1442 | } |
1443 | ||
7d12e780 | 1444 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1445 | { |
1da177e4 | 1446 | struct net_device *netdev = dev_instance; |
4cf1653a | 1447 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1448 | unsigned long lpar_rc; |
1449 | ||
288379f0 | 1450 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1451 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1452 | VIO_IRQ_DISABLE); | |
6485911a | 1453 | BUG_ON(lpar_rc != H_SUCCESS); |
288379f0 | 1454 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1455 | } |
1456 | return IRQ_HANDLED; | |
1457 | } | |
1458 | ||
1da177e4 LT |
1459 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1460 | { | |
4cf1653a | 1461 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1462 | unsigned long lpar_rc; |
1463 | ||
4cd24eaf JP |
1464 | if ((netdev->flags & IFF_PROMISC) || |
1465 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1466 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1467 | IbmVethMcastEnableRecv | | |
1468 | IbmVethMcastDisableFiltering, | |
1469 | 0); | |
f148f61d | 1470 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1471 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1472 | "entering promisc mode\n", lpar_rc); | |
1da177e4 LT |
1473 | } |
1474 | } else { | |
22bedad3 | 1475 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1476 | /* clear the filter table & disable filtering */ |
1477 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1478 | IbmVethMcastEnableRecv | | |
1479 | IbmVethMcastDisableFiltering | | |
1480 | IbmVethMcastClearFilterTable, | |
1481 | 0); | |
f148f61d | 1482 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1483 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1484 | "attempting to clear filter table\n", | |
1485 | lpar_rc); | |
1da177e4 LT |
1486 | } |
1487 | /* add the addresses to the filter table */ | |
22bedad3 | 1488 | netdev_for_each_mc_addr(ha, netdev) { |
f148f61d | 1489 | /* add the multicast address to the filter table */ |
d746ca95 | 1490 | u64 mcast_addr; |
5c8b3485 | 1491 | mcast_addr = ether_addr_to_u64(ha->addr); |
1da177e4 LT |
1492 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1493 | IbmVethMcastAddFilter, | |
1494 | mcast_addr); | |
f148f61d | 1495 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1496 | netdev_err(netdev, "h_multicast_ctrl rc=%ld " |
1497 | "when adding an entry to the filter " | |
1498 | "table\n", lpar_rc); | |
1da177e4 LT |
1499 | } |
1500 | } | |
d7fbeba6 | 1501 | |
1da177e4 LT |
1502 | /* re-enable filtering */ |
1503 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1504 | IbmVethMcastEnableFiltering, | |
1505 | 0); | |
f148f61d | 1506 | if (lpar_rc != H_SUCCESS) { |
21c2dece SL |
1507 | netdev_err(netdev, "h_multicast_ctrl rc=%ld when " |
1508 | "enabling filtering\n", lpar_rc); | |
1da177e4 LT |
1509 | } |
1510 | } | |
1511 | } | |
1512 | ||
1513 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1514 | { | |
4cf1653a | 1515 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1516 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1517 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1518 | int i, rc; |
1519 | int need_restart = 0; | |
b6d35182 | 1520 | |
517e80e6 | 1521 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
4fce1482 | 1522 | if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) |
ce6eea58 BK |
1523 | break; |
1524 | ||
517e80e6 | 1525 | if (i == IBMVETH_NUM_BUFF_POOLS) |
ce6eea58 BK |
1526 | return -EINVAL; |
1527 | ||
ea866e65 SL |
1528 | /* Deactivate all the buffer pools so that the next loop can activate |
1529 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1530 | if (netif_running(adapter->netdev)) { |
1531 | need_restart = 1; | |
0645bab7 | 1532 | ibmveth_close(adapter->netdev); |
0645bab7 | 1533 | } |
ea866e65 | 1534 | |
860f242e | 1535 | /* Look for an active buffer pool that can hold the new MTU */ |
f148f61d | 1536 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
ea866e65 | 1537 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1538 | |
4fce1482 | 1539 | if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1540 | dev->mtu = new_mtu; |
1541 | vio_cmo_set_dev_desired(viodev, | |
1542 | ibmveth_get_desired_dma | |
1543 | (viodev)); | |
0645bab7 RJ |
1544 | if (need_restart) { |
1545 | return ibmveth_open(adapter->netdev); | |
1546 | } | |
860f242e | 1547 | return 0; |
b6d35182 | 1548 | } |
b6d35182 | 1549 | } |
0645bab7 RJ |
1550 | |
1551 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1552 | return rc; | |
1553 | ||
860f242e | 1554 | return -EINVAL; |
1da177e4 LT |
1555 | } |
1556 | ||
6b422374 SL |
1557 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1558 | static void ibmveth_poll_controller(struct net_device *dev) | |
1559 | { | |
4cf1653a | 1560 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1561 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1562 | } |
1563 | #endif | |
1564 | ||
1096d63d RJ |
1565 | /** |
1566 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1567 | * | |
1568 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1569 | * | |
1570 | * Return value: | |
1571 | * Number of bytes of IO data the driver will need to perform well. | |
1572 | */ | |
1573 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1574 | { | |
1575 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1576 | struct ibmveth_adapter *adapter; | |
d0847757 | 1577 | struct iommu_table *tbl; |
1096d63d RJ |
1578 | unsigned long ret; |
1579 | int i; | |
1580 | int rxqentries = 1; | |
1581 | ||
d0847757 AP |
1582 | tbl = get_iommu_table_base(&vdev->dev); |
1583 | ||
1096d63d RJ |
1584 | /* netdev inits at probe time along with the structures we need below*/ |
1585 | if (netdev == NULL) | |
d0847757 | 1586 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); |
1096d63d RJ |
1587 | |
1588 | adapter = netdev_priv(netdev); | |
1589 | ||
1590 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
d0847757 | 1591 | ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); |
d6832ca4 NC |
1592 | /* add size of mapped tx buffers */ |
1593 | ret += IOMMU_PAGE_ALIGN(IBMVETH_MAX_TX_BUF_SIZE, tbl); | |
1096d63d | 1594 | |
517e80e6 | 1595 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
1096d63d RJ |
1596 | /* add the size of the active receive buffers */ |
1597 | if (adapter->rx_buff_pool[i].active) | |
1598 | ret += | |
1599 | adapter->rx_buff_pool[i].size * | |
1600 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
d0847757 | 1601 | buff_size, tbl); |
1096d63d RJ |
1602 | rxqentries += adapter->rx_buff_pool[i].size; |
1603 | } | |
1604 | /* add the size of the receive queue entries */ | |
d0847757 AP |
1605 | ret += IOMMU_PAGE_ALIGN( |
1606 | rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl); | |
1096d63d RJ |
1607 | |
1608 | return ret; | |
1609 | } | |
1610 | ||
c77c761f TF |
1611 | static int ibmveth_set_mac_addr(struct net_device *dev, void *p) |
1612 | { | |
1613 | struct ibmveth_adapter *adapter = netdev_priv(dev); | |
1614 | struct sockaddr *addr = p; | |
1615 | u64 mac_address; | |
1616 | int rc; | |
1617 | ||
1618 | if (!is_valid_ether_addr(addr->sa_data)) | |
1619 | return -EADDRNOTAVAIL; | |
1620 | ||
5c8b3485 | 1621 | mac_address = ether_addr_to_u64(addr->sa_data); |
c77c761f TF |
1622 | rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address); |
1623 | if (rc) { | |
1624 | netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc); | |
1625 | return rc; | |
1626 | } | |
1627 | ||
f3956ebb | 1628 | eth_hw_addr_set(dev, addr->sa_data); |
c77c761f TF |
1629 | |
1630 | return 0; | |
1631 | } | |
1632 | ||
e186d174 AB |
1633 | static const struct net_device_ops ibmveth_netdev_ops = { |
1634 | .ndo_open = ibmveth_open, | |
1635 | .ndo_stop = ibmveth_close, | |
1636 | .ndo_start_xmit = ibmveth_start_xmit, | |
afc4b13d | 1637 | .ndo_set_rx_mode = ibmveth_set_multicast_list, |
a7605370 | 1638 | .ndo_eth_ioctl = ibmveth_ioctl, |
e186d174 | 1639 | .ndo_change_mtu = ibmveth_change_mtu, |
b9367bf3 MM |
1640 | .ndo_fix_features = ibmveth_fix_features, |
1641 | .ndo_set_features = ibmveth_set_features, | |
e186d174 | 1642 | .ndo_validate_addr = eth_validate_addr, |
c77c761f | 1643 | .ndo_set_mac_address = ibmveth_set_mac_addr, |
e186d174 AB |
1644 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1645 | .ndo_poll_controller = ibmveth_poll_controller, | |
1646 | #endif | |
1647 | }; | |
1648 | ||
1dd06ae8 | 1649 | static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1da177e4 | 1650 | { |
13f85203 | 1651 | int rc, i, mac_len; |
1da177e4 | 1652 | struct net_device *netdev; |
9dc83afd | 1653 | struct ibmveth_adapter *adapter; |
1da177e4 | 1654 | unsigned char *mac_addr_p; |
66cf4710 | 1655 | __be32 *mcastFilterSize_p; |
07e6a97d TF |
1656 | long ret; |
1657 | unsigned long ret_attr; | |
1da177e4 | 1658 | |
c43ced18 SL |
1659 | dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n", |
1660 | dev->unit_address); | |
1da177e4 | 1661 | |
f148f61d | 1662 | mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR, |
13f85203 | 1663 | &mac_len); |
f148f61d | 1664 | if (!mac_addr_p) { |
21c2dece | 1665 | dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
be35ae9e | 1666 | return -EINVAL; |
1da177e4 | 1667 | } |
13f85203 BH |
1668 | /* Workaround for old/broken pHyp */ |
1669 | if (mac_len == 8) | |
1670 | mac_addr_p += 2; | |
1671 | else if (mac_len != 6) { | |
1672 | dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", | |
1673 | mac_len); | |
1674 | return -EINVAL; | |
1675 | } | |
d7fbeba6 | 1676 | |
66cf4710 TF |
1677 | mcastFilterSize_p = (__be32 *)vio_get_attribute(dev, |
1678 | VETH_MCAST_FILTER_SIZE, | |
1679 | NULL); | |
f148f61d | 1680 | if (!mcastFilterSize_p) { |
21c2dece SL |
1681 | dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " |
1682 | "attribute\n"); | |
be35ae9e | 1683 | return -EINVAL; |
1da177e4 | 1684 | } |
d7fbeba6 | 1685 | |
d926793c | 1686 | netdev = alloc_etherdev_mqs(sizeof(struct ibmveth_adapter), IBMVETH_MAX_QUEUES, 1); |
f148f61d | 1687 | if (!netdev) |
1da177e4 LT |
1688 | return -ENOMEM; |
1689 | ||
4cf1653a | 1690 | adapter = netdev_priv(netdev); |
c7ae011d | 1691 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1692 | |
1693 | adapter->vdev = dev; | |
1694 | adapter->netdev = netdev; | |
66cf4710 | 1695 | adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p); |
9aedc6e2 | 1696 | ibmveth_init_link_settings(netdev); |
d7fbeba6 | 1697 | |
b707b89f | 1698 | netif_napi_add_weight(netdev, &adapter->napi, ibmveth_poll, 16); |
bea3348e | 1699 | |
1da177e4 | 1700 | netdev->irq = dev->irq; |
e186d174 AB |
1701 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1702 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1703 | SET_NETDEV_DEV(netdev, &dev->dev); |
23d28a85 TH |
1704 | netdev->hw_features = NETIF_F_SG; |
1705 | if (vio_get_attribute(dev, "ibm,illan-options", NULL) != NULL) { | |
1706 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | | |
1707 | NETIF_F_RXCSUM; | |
1708 | } | |
07e6a97d | 1709 | |
b9367bf3 | 1710 | netdev->features |= netdev->hw_features; |
1da177e4 | 1711 | |
07e6a97d TF |
1712 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
1713 | ||
1714 | /* If running older firmware, TSO should not be enabled by default */ | |
1715 | if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) && | |
1716 | !old_large_send) { | |
1717 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; | |
1718 | netdev->features |= netdev->hw_features; | |
1719 | } else { | |
1720 | netdev->hw_features |= NETIF_F_TSO; | |
1721 | } | |
8641dd85 | 1722 | |
66aa0678 SK |
1723 | adapter->is_active_trunk = false; |
1724 | if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK)) { | |
1725 | adapter->is_active_trunk = true; | |
1726 | netdev->hw_features |= NETIF_F_FRAGLIST; | |
1727 | netdev->features |= NETIF_F_FRAGLIST; | |
1728 | } | |
1729 | ||
d894be57 | 1730 | netdev->min_mtu = IBMVETH_MIN_MTU; |
5948378b | 1731 | netdev->max_mtu = ETH_MAX_MTU - IBMVETH_BUFF_OH; |
d894be57 | 1732 | |
a96d317f | 1733 | eth_hw_addr_set(netdev, mac_addr_p); |
1da177e4 | 1734 | |
cd7c7ec3 TF |
1735 | if (firmware_has_feature(FW_FEATURE_CMO)) |
1736 | memcpy(pool_count, pool_count_cmo, sizeof(pool_count)); | |
1737 | ||
f148f61d | 1738 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e | 1739 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; |
8dde2a96 GKH |
1740 | int error; |
1741 | ||
d7fbeba6 JG |
1742 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1743 | pool_count[i], pool_size[i], | |
860f242e | 1744 | pool_active[i]); |
8dde2a96 GKH |
1745 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1746 | &dev->dev.kobj, "pool%d", i); | |
1747 | if (!error) | |
1748 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1749 | } |
1da177e4 | 1750 | |
742c60e1 NC |
1751 | rc = netif_set_real_num_tx_queues(netdev, min(num_online_cpus(), |
1752 | IBMVETH_DEFAULT_QUEUES)); | |
10c2aba8 NC |
1753 | if (rc) { |
1754 | netdev_dbg(netdev, "failed to set number of tx queues rc=%d\n", | |
1755 | rc); | |
1756 | free_netdev(netdev); | |
1757 | return rc; | |
1758 | } | |
d926793c | 1759 | adapter->tx_ltb_size = PAGE_ALIGN(IBMVETH_MAX_TX_BUF_SIZE); |
10c2aba8 NC |
1760 | for (i = 0; i < IBMVETH_MAX_QUEUES; i++) |
1761 | adapter->tx_ltb_ptr[i] = NULL; | |
d926793c | 1762 | |
c43ced18 | 1763 | netdev_dbg(netdev, "adapter @ 0x%p\n", adapter); |
c43ced18 | 1764 | netdev_dbg(netdev, "registering netdev...\n"); |
1da177e4 | 1765 | |
b801a4e7 MM |
1766 | ibmveth_set_features(netdev, netdev->features); |
1767 | ||
1da177e4 LT |
1768 | rc = register_netdev(netdev); |
1769 | ||
f148f61d | 1770 | if (rc) { |
c43ced18 | 1771 | netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); |
1da177e4 LT |
1772 | free_netdev(netdev); |
1773 | return rc; | |
1774 | } | |
1775 | ||
c43ced18 | 1776 | netdev_dbg(netdev, "registered\n"); |
1da177e4 | 1777 | |
1da177e4 LT |
1778 | return 0; |
1779 | } | |
1780 | ||
386a966f | 1781 | static void ibmveth_remove(struct vio_dev *dev) |
1da177e4 | 1782 | { |
c7ae011d | 1783 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1784 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1785 | int i; |
1786 | ||
f148f61d | 1787 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) |
c10997f6 | 1788 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1789 | |
1790 | unregister_netdev(netdev); | |
1791 | ||
1da177e4 | 1792 | free_netdev(netdev); |
1096d63d | 1793 | dev_set_drvdata(&dev->dev, NULL); |
1da177e4 LT |
1794 | } |
1795 | ||
860f242e SL |
1796 | static struct attribute veth_active_attr; |
1797 | static struct attribute veth_num_attr; | |
1798 | static struct attribute veth_size_attr; | |
1799 | ||
f148f61d SL |
1800 | static ssize_t veth_pool_show(struct kobject *kobj, |
1801 | struct attribute *attr, char *buf) | |
860f242e | 1802 | { |
d7fbeba6 | 1803 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1804 | struct ibmveth_buff_pool, |
1805 | kobj); | |
1806 | ||
1807 | if (attr == &veth_active_attr) | |
1808 | return sprintf(buf, "%d\n", pool->active); | |
1809 | else if (attr == &veth_num_attr) | |
1810 | return sprintf(buf, "%d\n", pool->size); | |
1811 | else if (attr == &veth_size_attr) | |
1812 | return sprintf(buf, "%d\n", pool->buff_size); | |
1813 | return 0; | |
1814 | } | |
1815 | ||
f148f61d SL |
1816 | static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr, |
1817 | const char *buf, size_t count) | |
860f242e | 1818 | { |
d7fbeba6 | 1819 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1820 | struct ibmveth_buff_pool, |
1821 | kobj); | |
1756055d | 1822 | struct net_device *netdev = dev_get_drvdata(kobj_to_dev(kobj->parent)); |
4cf1653a | 1823 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1824 | long value = simple_strtol(buf, NULL, 10); |
1825 | long rc; | |
1826 | ||
1827 | if (attr == &veth_active_attr) { | |
1828 | if (value && !pool->active) { | |
4aa9c93e | 1829 | if (netif_running(netdev)) { |
f148f61d | 1830 | if (ibmveth_alloc_buffer_pool(pool)) { |
21c2dece SL |
1831 | netdev_err(netdev, |
1832 | "unable to alloc pool\n"); | |
4aa9c93e BK |
1833 | return -ENOMEM; |
1834 | } | |
1835 | pool->active = 1; | |
4aa9c93e | 1836 | ibmveth_close(netdev); |
4aa9c93e BK |
1837 | if ((rc = ibmveth_open(netdev))) |
1838 | return rc; | |
f148f61d | 1839 | } else { |
4aa9c93e | 1840 | pool->active = 1; |
f148f61d | 1841 | } |
860f242e SL |
1842 | } else if (!value && pool->active) { |
1843 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1844 | int i; | |
1845 | /* Make sure there is a buffer pool with buffers that | |
1846 | can hold a packet of the size of the MTU */ | |
517e80e6 | 1847 | for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { |
860f242e SL |
1848 | if (pool == &adapter->rx_buff_pool[i]) |
1849 | continue; | |
1850 | if (!adapter->rx_buff_pool[i].active) | |
1851 | continue; | |
76b9cfcc BK |
1852 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1853 | break; | |
860f242e | 1854 | } |
76b9cfcc | 1855 | |
517e80e6 | 1856 | if (i == IBMVETH_NUM_BUFF_POOLS) { |
21c2dece | 1857 | netdev_err(netdev, "no active pool >= MTU\n"); |
860f242e SL |
1858 | return -EPERM; |
1859 | } | |
76b9cfcc | 1860 | |
76b9cfcc | 1861 | if (netif_running(netdev)) { |
76b9cfcc | 1862 | ibmveth_close(netdev); |
ea866e65 | 1863 | pool->active = 0; |
76b9cfcc BK |
1864 | if ((rc = ibmveth_open(netdev))) |
1865 | return rc; | |
1866 | } | |
ea866e65 | 1867 | pool->active = 0; |
860f242e SL |
1868 | } |
1869 | } else if (attr == &veth_num_attr) { | |
f148f61d | 1870 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) { |
860f242e | 1871 | return -EINVAL; |
f148f61d | 1872 | } else { |
4aa9c93e | 1873 | if (netif_running(netdev)) { |
4aa9c93e | 1874 | ibmveth_close(netdev); |
4aa9c93e BK |
1875 | pool->size = value; |
1876 | if ((rc = ibmveth_open(netdev))) | |
1877 | return rc; | |
f148f61d | 1878 | } else { |
4aa9c93e | 1879 | pool->size = value; |
f148f61d | 1880 | } |
860f242e SL |
1881 | } |
1882 | } else if (attr == &veth_size_attr) { | |
f148f61d | 1883 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) { |
860f242e | 1884 | return -EINVAL; |
f148f61d | 1885 | } else { |
4aa9c93e | 1886 | if (netif_running(netdev)) { |
4aa9c93e | 1887 | ibmveth_close(netdev); |
4aa9c93e BK |
1888 | pool->buff_size = value; |
1889 | if ((rc = ibmveth_open(netdev))) | |
1890 | return rc; | |
f148f61d | 1891 | } else { |
4aa9c93e | 1892 | pool->buff_size = value; |
f148f61d | 1893 | } |
860f242e SL |
1894 | } |
1895 | } | |
1896 | ||
1897 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1898 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1899 | return count; |
1900 | } | |
1901 | ||
1902 | ||
f148f61d SL |
1903 | #define ATTR(_name, _mode) \ |
1904 | struct attribute veth_##_name##_attr = { \ | |
1905 | .name = __stringify(_name), .mode = _mode, \ | |
1906 | }; | |
860f242e SL |
1907 | |
1908 | static ATTR(active, 0644); | |
1909 | static ATTR(num, 0644); | |
1910 | static ATTR(size, 0644); | |
1911 | ||
f148f61d | 1912 | static struct attribute *veth_pool_attrs[] = { |
860f242e SL |
1913 | &veth_active_attr, |
1914 | &veth_num_attr, | |
1915 | &veth_size_attr, | |
1916 | NULL, | |
1917 | }; | |
c288bc0d | 1918 | ATTRIBUTE_GROUPS(veth_pool); |
860f242e | 1919 | |
52cf25d0 | 1920 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1921 | .show = veth_pool_show, |
1922 | .store = veth_pool_store, | |
1923 | }; | |
1924 | ||
1925 | static struct kobj_type ktype_veth_pool = { | |
1926 | .release = NULL, | |
1927 | .sysfs_ops = &veth_pool_ops, | |
c288bc0d | 1928 | .default_groups = veth_pool_groups, |
860f242e SL |
1929 | }; |
1930 | ||
e7a3af5d BK |
1931 | static int ibmveth_resume(struct device *dev) |
1932 | { | |
1933 | struct net_device *netdev = dev_get_drvdata(dev); | |
1934 | ibmveth_interrupt(netdev->irq, netdev); | |
1935 | return 0; | |
1936 | } | |
860f242e | 1937 | |
71450804 | 1938 | static const struct vio_device_id ibmveth_device_table[] = { |
1da177e4 | 1939 | { "network", "IBM,l-lan"}, |
fb120da6 | 1940 | { "", "" } |
1da177e4 | 1941 | }; |
1da177e4 LT |
1942 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1943 | ||
eb60a73d | 1944 | static const struct dev_pm_ops ibmveth_pm_ops = { |
e7a3af5d BK |
1945 | .resume = ibmveth_resume |
1946 | }; | |
1947 | ||
1da177e4 | 1948 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1949 | .id_table = ibmveth_device_table, |
1950 | .probe = ibmveth_probe, | |
1951 | .remove = ibmveth_remove, | |
1096d63d | 1952 | .get_desired_dma = ibmveth_get_desired_dma, |
cb52d897 BH |
1953 | .name = ibmveth_driver_name, |
1954 | .pm = &ibmveth_pm_ops, | |
1da177e4 LT |
1955 | }; |
1956 | ||
1957 | static int __init ibmveth_module_init(void) | |
1958 | { | |
21c2dece SL |
1959 | printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, |
1960 | ibmveth_driver_string, ibmveth_driver_version); | |
1da177e4 | 1961 | |
1da177e4 LT |
1962 | return vio_register_driver(&ibmveth_driver); |
1963 | } | |
1964 | ||
1965 | static void __exit ibmveth_module_exit(void) | |
1966 | { | |
1967 | vio_unregister_driver(&ibmveth_driver); | |
d7fbeba6 | 1968 | } |
1da177e4 LT |
1969 | |
1970 | module_init(ibmveth_module_init); | |
1971 | module_exit(ibmveth_module_exit); |