ibmveth.c 40 KB

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  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. */
  27. /* */
  28. /**************************************************************************/
  29. /*
  30. TODO:
  31. - remove frag processing code - no longer needed
  32. - add support for sysfs
  33. - possibly remove procfs support
  34. */
  35. #include <linux/module.h>
  36. #include <linux/types.h>
  37. #include <linux/errno.h>
  38. #include <linux/ioport.h>
  39. #include <linux/dma-mapping.h>
  40. #include <linux/kernel.h>
  41. #include <linux/netdevice.h>
  42. #include <linux/etherdevice.h>
  43. #include <linux/skbuff.h>
  44. #include <linux/init.h>
  45. #include <linux/delay.h>
  46. #include <linux/mm.h>
  47. #include <linux/ethtool.h>
  48. #include <linux/proc_fs.h>
  49. #include <asm/semaphore.h>
  50. #include <asm/hvcall.h>
  51. #include <asm/atomic.h>
  52. #include <asm/vio.h>
  53. #include <asm/uaccess.h>
  54. #include <linux/seq_file.h>
  55. #include "ibmveth.h"
  56. #undef DEBUG
  57. #define ibmveth_printk(fmt, args...) \
  58. printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
  59. #define ibmveth_error_printk(fmt, args...) \
  60. printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  61. #ifdef DEBUG
  62. #define ibmveth_debug_printk_no_adapter(fmt, args...) \
  63. printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
  64. #define ibmveth_debug_printk(fmt, args...) \
  65. printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
  66. #define ibmveth_assert(expr) \
  67. if(!(expr)) { \
  68. printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
  69. BUG(); \
  70. }
  71. #else
  72. #define ibmveth_debug_printk_no_adapter(fmt, args...)
  73. #define ibmveth_debug_printk(fmt, args...)
  74. #define ibmveth_assert(expr)
  75. #endif
  76. static int ibmveth_open(struct net_device *dev);
  77. static int ibmveth_close(struct net_device *dev);
  78. static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  79. static int ibmveth_poll(struct net_device *dev, int *budget);
  80. static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
  81. static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
  82. static void ibmveth_set_multicast_list(struct net_device *dev);
  83. static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
  84. static void ibmveth_proc_register_driver(void);
  85. static void ibmveth_proc_unregister_driver(void);
  86. static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
  87. static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
  88. static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
  89. static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
  90. static struct kobj_type ktype_veth_pool;
  91. #ifdef CONFIG_PROC_FS
  92. #define IBMVETH_PROC_DIR "net/ibmveth"
  93. static struct proc_dir_entry *ibmveth_proc_dir;
  94. #endif
  95. static const char ibmveth_driver_name[] = "ibmveth";
  96. static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
  97. #define ibmveth_driver_version "1.03"
  98. MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
  99. MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
  100. MODULE_LICENSE("GPL");
  101. MODULE_VERSION(ibmveth_driver_version);
  102. /* simple methods of getting data from the current rxq entry */
  103. static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
  104. {
  105. return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
  106. }
  107. static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
  108. {
  109. return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
  110. }
  111. static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
  112. {
  113. return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
  114. }
  115. static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
  116. {
  117. return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
  118. }
  119. /* setup the initial settings for a buffer pool */
  120. static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
  121. {
  122. pool->size = pool_size;
  123. pool->index = pool_index;
  124. pool->buff_size = buff_size;
  125. pool->threshold = pool_size / 2;
  126. pool->active = pool_active;
  127. }
  128. /* allocate and setup an buffer pool - called during open */
  129. static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
  130. {
  131. int i;
  132. pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
  133. if(!pool->free_map) {
  134. return -1;
  135. }
  136. pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
  137. if(!pool->dma_addr) {
  138. kfree(pool->free_map);
  139. pool->free_map = NULL;
  140. return -1;
  141. }
  142. pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
  143. if(!pool->skbuff) {
  144. kfree(pool->dma_addr);
  145. pool->dma_addr = NULL;
  146. kfree(pool->free_map);
  147. pool->free_map = NULL;
  148. return -1;
  149. }
  150. memset(pool->skbuff, 0, sizeof(void*) * pool->size);
  151. memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
  152. for(i = 0; i < pool->size; ++i) {
  153. pool->free_map[i] = i;
  154. }
  155. atomic_set(&pool->available, 0);
  156. pool->producer_index = 0;
  157. pool->consumer_index = 0;
  158. return 0;
  159. }
  160. /* replenish the buffers for a pool. note that we don't need to
  161. * skb_reserve these since they are used for incoming...
  162. */
  163. static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
  164. {
  165. u32 i;
  166. u32 count = pool->size - atomic_read(&pool->available);
  167. u32 buffers_added = 0;
  168. mb();
  169. for(i = 0; i < count; ++i) {
  170. struct sk_buff *skb;
  171. unsigned int free_index, index;
  172. u64 correlator;
  173. union ibmveth_buf_desc desc;
  174. unsigned long lpar_rc;
  175. dma_addr_t dma_addr;
  176. skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
  177. if(!skb) {
  178. ibmveth_debug_printk("replenish: unable to allocate skb\n");
  179. adapter->replenish_no_mem++;
  180. break;
  181. }
  182. free_index = pool->consumer_index;
  183. pool->consumer_index = (pool->consumer_index + 1) % pool->size;
  184. index = pool->free_map[free_index];
  185. ibmveth_assert(index != IBM_VETH_INVALID_MAP);
  186. ibmveth_assert(pool->skbuff[index] == NULL);
  187. dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
  188. pool->buff_size, DMA_FROM_DEVICE);
  189. pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
  190. pool->dma_addr[index] = dma_addr;
  191. pool->skbuff[index] = skb;
  192. correlator = ((u64)pool->index << 32) | index;
  193. *(u64*)skb->data = correlator;
  194. desc.desc = 0;
  195. desc.fields.valid = 1;
  196. desc.fields.length = pool->buff_size;
  197. desc.fields.address = dma_addr;
  198. lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
  199. if(lpar_rc != H_SUCCESS) {
  200. pool->free_map[free_index] = index;
  201. pool->skbuff[index] = NULL;
  202. if (pool->consumer_index == 0)
  203. pool->consumer_index = pool->size - 1;
  204. else
  205. pool->consumer_index--;
  206. dma_unmap_single(&adapter->vdev->dev,
  207. pool->dma_addr[index], pool->buff_size,
  208. DMA_FROM_DEVICE);
  209. dev_kfree_skb_any(skb);
  210. adapter->replenish_add_buff_failure++;
  211. break;
  212. } else {
  213. buffers_added++;
  214. adapter->replenish_add_buff_success++;
  215. }
  216. }
  217. mb();
  218. atomic_add(buffers_added, &(pool->available));
  219. }
  220. /* replenish routine */
  221. static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
  222. {
  223. int i;
  224. adapter->replenish_task_cycles++;
  225. for(i = 0; i < IbmVethNumBufferPools; i++)
  226. if(adapter->rx_buff_pool[i].active)
  227. ibmveth_replenish_buffer_pool(adapter,
  228. &adapter->rx_buff_pool[i]);
  229. adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
  230. }
  231. /* empty and free ana buffer pool - also used to do cleanup in error paths */
  232. static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
  233. {
  234. int i;
  235. kfree(pool->free_map);
  236. pool->free_map = NULL;
  237. if(pool->skbuff && pool->dma_addr) {
  238. for(i = 0; i < pool->size; ++i) {
  239. struct sk_buff *skb = pool->skbuff[i];
  240. if(skb) {
  241. dma_unmap_single(&adapter->vdev->dev,
  242. pool->dma_addr[i],
  243. pool->buff_size,
  244. DMA_FROM_DEVICE);
  245. dev_kfree_skb_any(skb);
  246. pool->skbuff[i] = NULL;
  247. }
  248. }
  249. }
  250. if(pool->dma_addr) {
  251. kfree(pool->dma_addr);
  252. pool->dma_addr = NULL;
  253. }
  254. if(pool->skbuff) {
  255. kfree(pool->skbuff);
  256. pool->skbuff = NULL;
  257. }
  258. }
  259. /* remove a buffer from a pool */
  260. static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
  261. {
  262. unsigned int pool = correlator >> 32;
  263. unsigned int index = correlator & 0xffffffffUL;
  264. unsigned int free_index;
  265. struct sk_buff *skb;
  266. ibmveth_assert(pool < IbmVethNumBufferPools);
  267. ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
  268. skb = adapter->rx_buff_pool[pool].skbuff[index];
  269. ibmveth_assert(skb != NULL);
  270. adapter->rx_buff_pool[pool].skbuff[index] = NULL;
  271. dma_unmap_single(&adapter->vdev->dev,
  272. adapter->rx_buff_pool[pool].dma_addr[index],
  273. adapter->rx_buff_pool[pool].buff_size,
  274. DMA_FROM_DEVICE);
  275. free_index = adapter->rx_buff_pool[pool].producer_index;
  276. adapter->rx_buff_pool[pool].producer_index
  277. = (adapter->rx_buff_pool[pool].producer_index + 1)
  278. % adapter->rx_buff_pool[pool].size;
  279. adapter->rx_buff_pool[pool].free_map[free_index] = index;
  280. mb();
  281. atomic_dec(&(adapter->rx_buff_pool[pool].available));
  282. }
  283. /* get the current buffer on the rx queue */
  284. static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
  285. {
  286. u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
  287. unsigned int pool = correlator >> 32;
  288. unsigned int index = correlator & 0xffffffffUL;
  289. ibmveth_assert(pool < IbmVethNumBufferPools);
  290. ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
  291. return adapter->rx_buff_pool[pool].skbuff[index];
  292. }
  293. /* recycle the current buffer on the rx queue */
  294. static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
  295. {
  296. u32 q_index = adapter->rx_queue.index;
  297. u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
  298. unsigned int pool = correlator >> 32;
  299. unsigned int index = correlator & 0xffffffffUL;
  300. union ibmveth_buf_desc desc;
  301. unsigned long lpar_rc;
  302. ibmveth_assert(pool < IbmVethNumBufferPools);
  303. ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
  304. if(!adapter->rx_buff_pool[pool].active) {
  305. ibmveth_rxq_harvest_buffer(adapter);
  306. ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
  307. return;
  308. }
  309. desc.desc = 0;
  310. desc.fields.valid = 1;
  311. desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
  312. desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
  313. lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
  314. if(lpar_rc != H_SUCCESS) {
  315. ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
  316. ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
  317. }
  318. if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
  319. adapter->rx_queue.index = 0;
  320. adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
  321. }
  322. }
  323. static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
  324. {
  325. ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
  326. if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
  327. adapter->rx_queue.index = 0;
  328. adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
  329. }
  330. }
  331. static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
  332. {
  333. int i;
  334. if(adapter->buffer_list_addr != NULL) {
  335. if(!dma_mapping_error(adapter->buffer_list_dma)) {
  336. dma_unmap_single(&adapter->vdev->dev,
  337. adapter->buffer_list_dma, 4096,
  338. DMA_BIDIRECTIONAL);
  339. adapter->buffer_list_dma = DMA_ERROR_CODE;
  340. }
  341. free_page((unsigned long)adapter->buffer_list_addr);
  342. adapter->buffer_list_addr = NULL;
  343. }
  344. if(adapter->filter_list_addr != NULL) {
  345. if(!dma_mapping_error(adapter->filter_list_dma)) {
  346. dma_unmap_single(&adapter->vdev->dev,
  347. adapter->filter_list_dma, 4096,
  348. DMA_BIDIRECTIONAL);
  349. adapter->filter_list_dma = DMA_ERROR_CODE;
  350. }
  351. free_page((unsigned long)adapter->filter_list_addr);
  352. adapter->filter_list_addr = NULL;
  353. }
  354. if(adapter->rx_queue.queue_addr != NULL) {
  355. if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
  356. dma_unmap_single(&adapter->vdev->dev,
  357. adapter->rx_queue.queue_dma,
  358. adapter->rx_queue.queue_len,
  359. DMA_BIDIRECTIONAL);
  360. adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
  361. }
  362. kfree(adapter->rx_queue.queue_addr);
  363. adapter->rx_queue.queue_addr = NULL;
  364. }
  365. for(i = 0; i<IbmVethNumBufferPools; i++)
  366. if (adapter->rx_buff_pool[i].active)
  367. ibmveth_free_buffer_pool(adapter,
  368. &adapter->rx_buff_pool[i]);
  369. }
  370. static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
  371. union ibmveth_buf_desc rxq_desc, u64 mac_address)
  372. {
  373. int rc, try_again = 1;
  374. /* After a kexec the adapter will still be open, so our attempt to
  375. * open it will fail. So if we get a failure we free the adapter and
  376. * try again, but only once. */
  377. retry:
  378. rc = h_register_logical_lan(adapter->vdev->unit_address,
  379. adapter->buffer_list_dma, rxq_desc.desc,
  380. adapter->filter_list_dma, mac_address);
  381. if (rc != H_SUCCESS && try_again) {
  382. do {
  383. rc = h_free_logical_lan(adapter->vdev->unit_address);
  384. } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
  385. try_again = 0;
  386. goto retry;
  387. }
  388. return rc;
  389. }
  390. static int ibmveth_open(struct net_device *netdev)
  391. {
  392. struct ibmveth_adapter *adapter = netdev->priv;
  393. u64 mac_address = 0;
  394. int rxq_entries = 1;
  395. unsigned long lpar_rc;
  396. int rc;
  397. union ibmveth_buf_desc rxq_desc;
  398. int i;
  399. ibmveth_debug_printk("open starting\n");
  400. for(i = 0; i<IbmVethNumBufferPools; i++)
  401. rxq_entries += adapter->rx_buff_pool[i].size;
  402. adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
  403. adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
  404. if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
  405. ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
  406. ibmveth_cleanup(adapter);
  407. return -ENOMEM;
  408. }
  409. adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
  410. adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
  411. if(!adapter->rx_queue.queue_addr) {
  412. ibmveth_error_printk("unable to allocate rx queue pages\n");
  413. ibmveth_cleanup(adapter);
  414. return -ENOMEM;
  415. }
  416. adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
  417. adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
  418. adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
  419. adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
  420. adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
  421. adapter->rx_queue.queue_addr,
  422. adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
  423. if((dma_mapping_error(adapter->buffer_list_dma) ) ||
  424. (dma_mapping_error(adapter->filter_list_dma)) ||
  425. (dma_mapping_error(adapter->rx_queue.queue_dma))) {
  426. ibmveth_error_printk("unable to map filter or buffer list pages\n");
  427. ibmveth_cleanup(adapter);
  428. return -ENOMEM;
  429. }
  430. adapter->rx_queue.index = 0;
  431. adapter->rx_queue.num_slots = rxq_entries;
  432. adapter->rx_queue.toggle = 1;
  433. memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
  434. mac_address = mac_address >> 16;
  435. rxq_desc.desc = 0;
  436. rxq_desc.fields.valid = 1;
  437. rxq_desc.fields.length = adapter->rx_queue.queue_len;
  438. rxq_desc.fields.address = adapter->rx_queue.queue_dma;
  439. ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
  440. ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
  441. ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
  442. h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
  443. lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
  444. if(lpar_rc != H_SUCCESS) {
  445. ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
  446. ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
  447. adapter->buffer_list_dma,
  448. adapter->filter_list_dma,
  449. rxq_desc.desc,
  450. mac_address);
  451. ibmveth_cleanup(adapter);
  452. return -ENONET;
  453. }
  454. for(i = 0; i<IbmVethNumBufferPools; i++) {
  455. if(!adapter->rx_buff_pool[i].active)
  456. continue;
  457. if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
  458. ibmveth_error_printk("unable to alloc pool\n");
  459. adapter->rx_buff_pool[i].active = 0;
  460. ibmveth_cleanup(adapter);
  461. return -ENOMEM ;
  462. }
  463. }
  464. ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
  465. if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
  466. ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
  467. do {
  468. rc = h_free_logical_lan(adapter->vdev->unit_address);
  469. } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
  470. ibmveth_cleanup(adapter);
  471. return rc;
  472. }
  473. ibmveth_debug_printk("initial replenish cycle\n");
  474. ibmveth_interrupt(netdev->irq, netdev);
  475. netif_start_queue(netdev);
  476. ibmveth_debug_printk("open complete\n");
  477. return 0;
  478. }
  479. static int ibmveth_close(struct net_device *netdev)
  480. {
  481. struct ibmveth_adapter *adapter = netdev->priv;
  482. long lpar_rc;
  483. ibmveth_debug_printk("close starting\n");
  484. if (!adapter->pool_config)
  485. netif_stop_queue(netdev);
  486. free_irq(netdev->irq, netdev);
  487. do {
  488. lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
  489. } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
  490. if(lpar_rc != H_SUCCESS)
  491. {
  492. ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
  493. lpar_rc);
  494. }
  495. adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
  496. ibmveth_cleanup(adapter);
  497. ibmveth_debug_printk("close complete\n");
  498. return 0;
  499. }
  500. static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
  501. cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
  502. cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
  503. cmd->speed = SPEED_1000;
  504. cmd->duplex = DUPLEX_FULL;
  505. cmd->port = PORT_FIBRE;
  506. cmd->phy_address = 0;
  507. cmd->transceiver = XCVR_INTERNAL;
  508. cmd->autoneg = AUTONEG_ENABLE;
  509. cmd->maxtxpkt = 0;
  510. cmd->maxrxpkt = 1;
  511. return 0;
  512. }
  513. static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
  514. strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
  515. strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
  516. }
  517. static u32 netdev_get_link(struct net_device *dev) {
  518. return 1;
  519. }
  520. static const struct ethtool_ops netdev_ethtool_ops = {
  521. .get_drvinfo = netdev_get_drvinfo,
  522. .get_settings = netdev_get_settings,
  523. .get_link = netdev_get_link,
  524. .get_sg = ethtool_op_get_sg,
  525. .get_tx_csum = ethtool_op_get_tx_csum,
  526. };
  527. static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  528. {
  529. return -EOPNOTSUPP;
  530. }
  531. #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
  532. static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
  533. {
  534. struct ibmveth_adapter *adapter = netdev->priv;
  535. union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
  536. unsigned long lpar_rc;
  537. int nfrags = 0, curfrag;
  538. unsigned long correlator;
  539. unsigned long flags;
  540. unsigned int retry_count;
  541. unsigned int tx_dropped = 0;
  542. unsigned int tx_bytes = 0;
  543. unsigned int tx_packets = 0;
  544. unsigned int tx_send_failed = 0;
  545. unsigned int tx_map_failed = 0;
  546. if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
  547. tx_dropped++;
  548. goto out;
  549. }
  550. memset(&desc, 0, sizeof(desc));
  551. /* nfrags = number of frags after the initial fragment */
  552. nfrags = skb_shinfo(skb)->nr_frags;
  553. if(nfrags)
  554. adapter->tx_multidesc_send++;
  555. /* map the initial fragment */
  556. desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
  557. desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
  558. desc[0].fields.length, DMA_TO_DEVICE);
  559. desc[0].fields.valid = 1;
  560. if(dma_mapping_error(desc[0].fields.address)) {
  561. ibmveth_error_printk("tx: unable to map initial fragment\n");
  562. tx_map_failed++;
  563. tx_dropped++;
  564. goto out;
  565. }
  566. curfrag = nfrags;
  567. /* map fragments past the initial portion if there are any */
  568. while(curfrag--) {
  569. skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
  570. desc[curfrag+1].fields.address
  571. = dma_map_single(&adapter->vdev->dev,
  572. page_address(frag->page) + frag->page_offset,
  573. frag->size, DMA_TO_DEVICE);
  574. desc[curfrag+1].fields.length = frag->size;
  575. desc[curfrag+1].fields.valid = 1;
  576. if(dma_mapping_error(desc[curfrag+1].fields.address)) {
  577. ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
  578. tx_map_failed++;
  579. tx_dropped++;
  580. /* Free all the mappings we just created */
  581. while(curfrag < nfrags) {
  582. dma_unmap_single(&adapter->vdev->dev,
  583. desc[curfrag+1].fields.address,
  584. desc[curfrag+1].fields.length,
  585. DMA_TO_DEVICE);
  586. curfrag++;
  587. }
  588. goto out;
  589. }
  590. }
  591. /* send the frame. Arbitrarily set retrycount to 1024 */
  592. correlator = 0;
  593. retry_count = 1024;
  594. do {
  595. lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
  596. desc[0].desc,
  597. desc[1].desc,
  598. desc[2].desc,
  599. desc[3].desc,
  600. desc[4].desc,
  601. desc[5].desc,
  602. correlator,
  603. &correlator);
  604. } while ((lpar_rc == H_BUSY) && (retry_count--));
  605. if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
  606. int i;
  607. ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
  608. for(i = 0; i < 6; i++) {
  609. ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
  610. desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
  611. }
  612. tx_send_failed++;
  613. tx_dropped++;
  614. } else {
  615. tx_packets++;
  616. tx_bytes += skb->len;
  617. netdev->trans_start = jiffies;
  618. }
  619. do {
  620. dma_unmap_single(&adapter->vdev->dev,
  621. desc[nfrags].fields.address,
  622. desc[nfrags].fields.length, DMA_TO_DEVICE);
  623. } while(--nfrags >= 0);
  624. out: spin_lock_irqsave(&adapter->stats_lock, flags);
  625. adapter->stats.tx_dropped += tx_dropped;
  626. adapter->stats.tx_bytes += tx_bytes;
  627. adapter->stats.tx_packets += tx_packets;
  628. adapter->tx_send_failed += tx_send_failed;
  629. adapter->tx_map_failed += tx_map_failed;
  630. spin_unlock_irqrestore(&adapter->stats_lock, flags);
  631. dev_kfree_skb(skb);
  632. return 0;
  633. }
  634. static int ibmveth_poll(struct net_device *netdev, int *budget)
  635. {
  636. struct ibmveth_adapter *adapter = netdev->priv;
  637. int max_frames_to_process = netdev->quota;
  638. int frames_processed = 0;
  639. int more_work = 1;
  640. unsigned long lpar_rc;
  641. restart_poll:
  642. do {
  643. struct net_device *netdev = adapter->netdev;
  644. if(ibmveth_rxq_pending_buffer(adapter)) {
  645. struct sk_buff *skb;
  646. rmb();
  647. if(!ibmveth_rxq_buffer_valid(adapter)) {
  648. wmb(); /* suggested by larson1 */
  649. adapter->rx_invalid_buffer++;
  650. ibmveth_debug_printk("recycling invalid buffer\n");
  651. ibmveth_rxq_recycle_buffer(adapter);
  652. } else {
  653. int length = ibmveth_rxq_frame_length(adapter);
  654. int offset = ibmveth_rxq_frame_offset(adapter);
  655. skb = ibmveth_rxq_get_buffer(adapter);
  656. ibmveth_rxq_harvest_buffer(adapter);
  657. skb_reserve(skb, offset);
  658. skb_put(skb, length);
  659. skb->dev = netdev;
  660. skb->protocol = eth_type_trans(skb, netdev);
  661. netif_receive_skb(skb); /* send it up */
  662. adapter->stats.rx_packets++;
  663. adapter->stats.rx_bytes += length;
  664. frames_processed++;
  665. netdev->last_rx = jiffies;
  666. }
  667. } else {
  668. more_work = 0;
  669. }
  670. } while(more_work && (frames_processed < max_frames_to_process));
  671. ibmveth_replenish_task(adapter);
  672. if(more_work) {
  673. /* more work to do - return that we are not done yet */
  674. netdev->quota -= frames_processed;
  675. *budget -= frames_processed;
  676. return 1;
  677. }
  678. /* we think we are done - reenable interrupts, then check once more to make sure we are done */
  679. lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
  680. ibmveth_assert(lpar_rc == H_SUCCESS);
  681. netif_rx_complete(netdev);
  682. if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
  683. {
  684. lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
  685. ibmveth_assert(lpar_rc == H_SUCCESS);
  686. more_work = 1;
  687. goto restart_poll;
  688. }
  689. netdev->quota -= frames_processed;
  690. *budget -= frames_processed;
  691. /* we really are done */
  692. return 0;
  693. }
  694. static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
  695. {
  696. struct net_device *netdev = dev_instance;
  697. struct ibmveth_adapter *adapter = netdev->priv;
  698. unsigned long lpar_rc;
  699. if(netif_rx_schedule_prep(netdev)) {
  700. lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
  701. ibmveth_assert(lpar_rc == H_SUCCESS);
  702. __netif_rx_schedule(netdev);
  703. }
  704. return IRQ_HANDLED;
  705. }
  706. static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
  707. {
  708. struct ibmveth_adapter *adapter = dev->priv;
  709. return &adapter->stats;
  710. }
  711. static void ibmveth_set_multicast_list(struct net_device *netdev)
  712. {
  713. struct ibmveth_adapter *adapter = netdev->priv;
  714. unsigned long lpar_rc;
  715. if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
  716. lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
  717. IbmVethMcastEnableRecv |
  718. IbmVethMcastDisableFiltering,
  719. 0);
  720. if(lpar_rc != H_SUCCESS) {
  721. ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
  722. }
  723. } else {
  724. struct dev_mc_list *mclist = netdev->mc_list;
  725. int i;
  726. /* clear the filter table & disable filtering */
  727. lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
  728. IbmVethMcastEnableRecv |
  729. IbmVethMcastDisableFiltering |
  730. IbmVethMcastClearFilterTable,
  731. 0);
  732. if(lpar_rc != H_SUCCESS) {
  733. ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
  734. }
  735. /* add the addresses to the filter table */
  736. for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
  737. // add the multicast address to the filter table
  738. unsigned long mcast_addr = 0;
  739. memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
  740. lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
  741. IbmVethMcastAddFilter,
  742. mcast_addr);
  743. if(lpar_rc != H_SUCCESS) {
  744. ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
  745. }
  746. }
  747. /* re-enable filtering */
  748. lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
  749. IbmVethMcastEnableFiltering,
  750. 0);
  751. if(lpar_rc != H_SUCCESS) {
  752. ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
  753. }
  754. }
  755. }
  756. static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
  757. {
  758. struct ibmveth_adapter *adapter = dev->priv;
  759. int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
  760. int i;
  761. if (new_mtu < IBMVETH_MAX_MTU)
  762. return -EINVAL;
  763. /* Look for an active buffer pool that can hold the new MTU */
  764. for(i = 0; i<IbmVethNumBufferPools; i++) {
  765. if (!adapter->rx_buff_pool[i].active)
  766. continue;
  767. if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
  768. dev->mtu = new_mtu;
  769. return 0;
  770. }
  771. }
  772. return -EINVAL;
  773. }
  774. #ifdef CONFIG_NET_POLL_CONTROLLER
  775. static void ibmveth_poll_controller(struct net_device *dev)
  776. {
  777. ibmveth_replenish_task(dev->priv);
  778. ibmveth_interrupt(dev->irq, dev);
  779. }
  780. #endif
  781. static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
  782. {
  783. int rc, i;
  784. struct net_device *netdev;
  785. struct ibmveth_adapter *adapter = NULL;
  786. unsigned char *mac_addr_p;
  787. unsigned int *mcastFilterSize_p;
  788. ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
  789. dev->unit_address);
  790. mac_addr_p = (unsigned char *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
  791. if(!mac_addr_p) {
  792. printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
  793. "attribute\n", __FILE__, __LINE__);
  794. return 0;
  795. }
  796. mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
  797. if(!mcastFilterSize_p) {
  798. printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
  799. "VETH_MCAST_FILTER_SIZE attribute\n",
  800. __FILE__, __LINE__);
  801. return 0;
  802. }
  803. netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
  804. if(!netdev)
  805. return -ENOMEM;
  806. SET_MODULE_OWNER(netdev);
  807. adapter = netdev->priv;
  808. memset(adapter, 0, sizeof(adapter));
  809. dev->dev.driver_data = netdev;
  810. adapter->vdev = dev;
  811. adapter->netdev = netdev;
  812. adapter->mcastFilterSize= *mcastFilterSize_p;
  813. adapter->pool_config = 0;
  814. /* Some older boxes running PHYP non-natively have an OF that
  815. returns a 8-byte local-mac-address field (and the first
  816. 2 bytes have to be ignored) while newer boxes' OF return
  817. a 6-byte field. Note that IEEE 1275 specifies that
  818. local-mac-address must be a 6-byte field.
  819. The RPA doc specifies that the first byte must be 10b, so
  820. we'll just look for it to solve this 8 vs. 6 byte field issue */
  821. if ((*mac_addr_p & 0x3) != 0x02)
  822. mac_addr_p += 2;
  823. adapter->mac_addr = 0;
  824. memcpy(&adapter->mac_addr, mac_addr_p, 6);
  825. netdev->irq = dev->irq;
  826. netdev->open = ibmveth_open;
  827. netdev->poll = ibmveth_poll;
  828. netdev->weight = 16;
  829. netdev->stop = ibmveth_close;
  830. netdev->hard_start_xmit = ibmveth_start_xmit;
  831. netdev->get_stats = ibmveth_get_stats;
  832. netdev->set_multicast_list = ibmveth_set_multicast_list;
  833. netdev->do_ioctl = ibmveth_ioctl;
  834. netdev->ethtool_ops = &netdev_ethtool_ops;
  835. netdev->change_mtu = ibmveth_change_mtu;
  836. SET_NETDEV_DEV(netdev, &dev->dev);
  837. #ifdef CONFIG_NET_POLL_CONTROLLER
  838. netdev->poll_controller = ibmveth_poll_controller;
  839. #endif
  840. netdev->features |= NETIF_F_LLTX;
  841. spin_lock_init(&adapter->stats_lock);
  842. memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
  843. for(i = 0; i<IbmVethNumBufferPools; i++) {
  844. struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
  845. ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
  846. pool_count[i], pool_size[i],
  847. pool_active[i]);
  848. kobj->parent = &dev->dev.kobj;
  849. sprintf(kobj->name, "pool%d", i);
  850. kobj->ktype = &ktype_veth_pool;
  851. kobject_register(kobj);
  852. }
  853. ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
  854. adapter->buffer_list_dma = DMA_ERROR_CODE;
  855. adapter->filter_list_dma = DMA_ERROR_CODE;
  856. adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
  857. ibmveth_debug_printk("registering netdev...\n");
  858. rc = register_netdev(netdev);
  859. if(rc) {
  860. ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
  861. free_netdev(netdev);
  862. return rc;
  863. }
  864. ibmveth_debug_printk("registered\n");
  865. ibmveth_proc_register_adapter(adapter);
  866. return 0;
  867. }
  868. static int __devexit ibmveth_remove(struct vio_dev *dev)
  869. {
  870. struct net_device *netdev = dev->dev.driver_data;
  871. struct ibmveth_adapter *adapter = netdev->priv;
  872. int i;
  873. for(i = 0; i<IbmVethNumBufferPools; i++)
  874. kobject_unregister(&adapter->rx_buff_pool[i].kobj);
  875. unregister_netdev(netdev);
  876. ibmveth_proc_unregister_adapter(adapter);
  877. free_netdev(netdev);
  878. return 0;
  879. }
  880. #ifdef CONFIG_PROC_FS
  881. static void ibmveth_proc_register_driver(void)
  882. {
  883. ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL);
  884. if (ibmveth_proc_dir) {
  885. SET_MODULE_OWNER(ibmveth_proc_dir);
  886. }
  887. }
  888. static void ibmveth_proc_unregister_driver(void)
  889. {
  890. remove_proc_entry(IBMVETH_PROC_DIR, NULL);
  891. }
  892. static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
  893. {
  894. if (*pos == 0) {
  895. return (void *)1;
  896. } else {
  897. return NULL;
  898. }
  899. }
  900. static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  901. {
  902. ++*pos;
  903. return NULL;
  904. }
  905. static void ibmveth_seq_stop(struct seq_file *seq, void *v)
  906. {
  907. }
  908. static int ibmveth_seq_show(struct seq_file *seq, void *v)
  909. {
  910. struct ibmveth_adapter *adapter = seq->private;
  911. char *current_mac = ((char*) &adapter->netdev->dev_addr);
  912. char *firmware_mac = ((char*) &adapter->mac_addr) ;
  913. seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
  914. seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
  915. seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
  916. current_mac[0], current_mac[1], current_mac[2],
  917. current_mac[3], current_mac[4], current_mac[5]);
  918. seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
  919. firmware_mac[0], firmware_mac[1], firmware_mac[2],
  920. firmware_mac[3], firmware_mac[4], firmware_mac[5]);
  921. seq_printf(seq, "\nAdapter Statistics:\n");
  922. seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
  923. seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
  924. seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
  925. seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
  926. seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
  927. seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
  928. seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
  929. seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
  930. seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
  931. seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
  932. return 0;
  933. }
  934. static struct seq_operations ibmveth_seq_ops = {
  935. .start = ibmveth_seq_start,
  936. .next = ibmveth_seq_next,
  937. .stop = ibmveth_seq_stop,
  938. .show = ibmveth_seq_show,
  939. };
  940. static int ibmveth_proc_open(struct inode *inode, struct file *file)
  941. {
  942. struct seq_file *seq;
  943. struct proc_dir_entry *proc;
  944. int rc;
  945. rc = seq_open(file, &ibmveth_seq_ops);
  946. if (!rc) {
  947. /* recover the pointer buried in proc_dir_entry data */
  948. seq = file->private_data;
  949. proc = PDE(inode);
  950. seq->private = proc->data;
  951. }
  952. return rc;
  953. }
  954. static const struct file_operations ibmveth_proc_fops = {
  955. .owner = THIS_MODULE,
  956. .open = ibmveth_proc_open,
  957. .read = seq_read,
  958. .llseek = seq_lseek,
  959. .release = seq_release,
  960. };
  961. static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
  962. {
  963. struct proc_dir_entry *entry;
  964. if (ibmveth_proc_dir) {
  965. char u_addr[10];
  966. sprintf(u_addr, "%x", adapter->vdev->unit_address);
  967. entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
  968. if (!entry) {
  969. ibmveth_error_printk("Cannot create adapter proc entry");
  970. } else {
  971. entry->data = (void *) adapter;
  972. entry->proc_fops = &ibmveth_proc_fops;
  973. SET_MODULE_OWNER(entry);
  974. }
  975. }
  976. return;
  977. }
  978. static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
  979. {
  980. if (ibmveth_proc_dir) {
  981. char u_addr[10];
  982. sprintf(u_addr, "%x", adapter->vdev->unit_address);
  983. remove_proc_entry(u_addr, ibmveth_proc_dir);
  984. }
  985. }
  986. #else /* CONFIG_PROC_FS */
  987. static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
  988. {
  989. }
  990. static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
  991. {
  992. }
  993. static void ibmveth_proc_register_driver(void)
  994. {
  995. }
  996. static void ibmveth_proc_unregister_driver(void)
  997. {
  998. }
  999. #endif /* CONFIG_PROC_FS */
  1000. static struct attribute veth_active_attr;
  1001. static struct attribute veth_num_attr;
  1002. static struct attribute veth_size_attr;
  1003. static ssize_t veth_pool_show(struct kobject * kobj,
  1004. struct attribute * attr, char * buf)
  1005. {
  1006. struct ibmveth_buff_pool *pool = container_of(kobj,
  1007. struct ibmveth_buff_pool,
  1008. kobj);
  1009. if (attr == &veth_active_attr)
  1010. return sprintf(buf, "%d\n", pool->active);
  1011. else if (attr == &veth_num_attr)
  1012. return sprintf(buf, "%d\n", pool->size);
  1013. else if (attr == &veth_size_attr)
  1014. return sprintf(buf, "%d\n", pool->buff_size);
  1015. return 0;
  1016. }
  1017. static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
  1018. const char * buf, size_t count)
  1019. {
  1020. struct ibmveth_buff_pool *pool = container_of(kobj,
  1021. struct ibmveth_buff_pool,
  1022. kobj);
  1023. struct net_device *netdev =
  1024. container_of(kobj->parent, struct device, kobj)->driver_data;
  1025. struct ibmveth_adapter *adapter = netdev->priv;
  1026. long value = simple_strtol(buf, NULL, 10);
  1027. long rc;
  1028. if (attr == &veth_active_attr) {
  1029. if (value && !pool->active) {
  1030. if(ibmveth_alloc_buffer_pool(pool)) {
  1031. ibmveth_error_printk("unable to alloc pool\n");
  1032. return -ENOMEM;
  1033. }
  1034. pool->active = 1;
  1035. adapter->pool_config = 1;
  1036. ibmveth_close(netdev);
  1037. adapter->pool_config = 0;
  1038. if ((rc = ibmveth_open(netdev)))
  1039. return rc;
  1040. } else if (!value && pool->active) {
  1041. int mtu = netdev->mtu + IBMVETH_BUFF_OH;
  1042. int i;
  1043. /* Make sure there is a buffer pool with buffers that
  1044. can hold a packet of the size of the MTU */
  1045. for(i = 0; i<IbmVethNumBufferPools; i++) {
  1046. if (pool == &adapter->rx_buff_pool[i])
  1047. continue;
  1048. if (!adapter->rx_buff_pool[i].active)
  1049. continue;
  1050. if (mtu < adapter->rx_buff_pool[i].buff_size) {
  1051. pool->active = 0;
  1052. h_free_logical_lan_buffer(adapter->
  1053. vdev->
  1054. unit_address,
  1055. pool->
  1056. buff_size);
  1057. }
  1058. }
  1059. if (pool->active) {
  1060. ibmveth_error_printk("no active pool >= MTU\n");
  1061. return -EPERM;
  1062. }
  1063. }
  1064. } else if (attr == &veth_num_attr) {
  1065. if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
  1066. return -EINVAL;
  1067. else {
  1068. adapter->pool_config = 1;
  1069. ibmveth_close(netdev);
  1070. adapter->pool_config = 0;
  1071. pool->size = value;
  1072. if ((rc = ibmveth_open(netdev)))
  1073. return rc;
  1074. }
  1075. } else if (attr == &veth_size_attr) {
  1076. if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
  1077. return -EINVAL;
  1078. else {
  1079. adapter->pool_config = 1;
  1080. ibmveth_close(netdev);
  1081. adapter->pool_config = 0;
  1082. pool->buff_size = value;
  1083. if ((rc = ibmveth_open(netdev)))
  1084. return rc;
  1085. }
  1086. }
  1087. /* kick the interrupt handler to allocate/deallocate pools */
  1088. ibmveth_interrupt(netdev->irq, netdev);
  1089. return count;
  1090. }
  1091. #define ATTR(_name, _mode) \
  1092. struct attribute veth_##_name##_attr = { \
  1093. .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE \
  1094. };
  1095. static ATTR(active, 0644);
  1096. static ATTR(num, 0644);
  1097. static ATTR(size, 0644);
  1098. static struct attribute * veth_pool_attrs[] = {
  1099. &veth_active_attr,
  1100. &veth_num_attr,
  1101. &veth_size_attr,
  1102. NULL,
  1103. };
  1104. static struct sysfs_ops veth_pool_ops = {
  1105. .show = veth_pool_show,
  1106. .store = veth_pool_store,
  1107. };
  1108. static struct kobj_type ktype_veth_pool = {
  1109. .release = NULL,
  1110. .sysfs_ops = &veth_pool_ops,
  1111. .default_attrs = veth_pool_attrs,
  1112. };
  1113. static struct vio_device_id ibmveth_device_table[] __devinitdata= {
  1114. { "network", "IBM,l-lan"},
  1115. { "", "" }
  1116. };
  1117. MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
  1118. static struct vio_driver ibmveth_driver = {
  1119. .id_table = ibmveth_device_table,
  1120. .probe = ibmveth_probe,
  1121. .remove = ibmveth_remove,
  1122. .driver = {
  1123. .name = ibmveth_driver_name,
  1124. .owner = THIS_MODULE,
  1125. }
  1126. };
  1127. static int __init ibmveth_module_init(void)
  1128. {
  1129. ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
  1130. ibmveth_proc_register_driver();
  1131. return vio_register_driver(&ibmveth_driver);
  1132. }
  1133. static void __exit ibmveth_module_exit(void)
  1134. {
  1135. vio_unregister_driver(&ibmveth_driver);
  1136. ibmveth_proc_unregister_driver();
  1137. }
  1138. module_init(ibmveth_module_init);
  1139. module_exit(ibmveth_module_exit);