1 /**************************************************************************/
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) */
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. */
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. */
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 */
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. */
28 /**************************************************************************/
31 - remove frag processing code - no longer needed
32 - add support for sysfs
33 - possibly remove procfs support
36 #include <linux/module.h>
37 #include <linux/types.h>
38 #include <linux/errno.h>
39 #include <linux/ioport.h>
40 #include <linux/dma-mapping.h>
41 #include <linux/kernel.h>
42 #include <linux/netdevice.h>
43 #include <linux/etherdevice.h>
44 #include <linux/skbuff.h>
45 #include <linux/init.h>
46 #include <linux/delay.h>
48 #include <linux/ethtool.h>
49 #include <linux/proc_fs.h>
52 #include <net/net_namespace.h>
53 #include <asm/semaphore.h>
54 #include <asm/hvcall.h>
55 #include <asm/atomic.h>
57 #include <asm/uaccess.h>
58 #include <linux/seq_file.h>
64 #define ibmveth_printk(fmt, args...) \
65 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
67 #define ibmveth_error_printk(fmt, args...) \
68 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
71 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
72 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
73 #define ibmveth_debug_printk(fmt, args...) \
74 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
75 #define ibmveth_assert(expr) \
77 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
81 #define ibmveth_debug_printk_no_adapter(fmt, args...)
82 #define ibmveth_debug_printk(fmt, args...)
83 #define ibmveth_assert(expr)
86 static int ibmveth_open(struct net_device *dev);
87 static int ibmveth_close(struct net_device *dev);
88 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
89 static int ibmveth_poll(struct napi_struct *napi, int budget);
90 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
91 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
92 static void ibmveth_set_multicast_list(struct net_device *dev);
93 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
94 static void ibmveth_proc_register_driver(void);
95 static void ibmveth_proc_unregister_driver(void);
96 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
97 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
98 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
99 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
100 static struct kobj_type ktype_veth_pool;
102 #ifdef CONFIG_PROC_FS
103 #define IBMVETH_PROC_DIR "ibmveth"
104 static struct proc_dir_entry *ibmveth_proc_dir;
107 static const char ibmveth_driver_name[] = "ibmveth";
108 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
109 #define ibmveth_driver_version "1.03"
111 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
112 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
113 MODULE_LICENSE("GPL");
114 MODULE_VERSION(ibmveth_driver_version);
116 /* simple methods of getting data from the current rxq entry */
117 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
119 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
122 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
124 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
127 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
129 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
132 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
134 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
137 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
139 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].csum_good);
142 /* setup the initial settings for a buffer pool */
143 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
145 pool->size = pool_size;
146 pool->index = pool_index;
147 pool->buff_size = buff_size;
148 pool->threshold = pool_size / 2;
149 pool->active = pool_active;
152 /* allocate and setup an buffer pool - called during open */
153 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
157 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
159 if(!pool->free_map) {
163 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
164 if(!pool->dma_addr) {
165 kfree(pool->free_map);
166 pool->free_map = NULL;
170 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
173 kfree(pool->dma_addr);
174 pool->dma_addr = NULL;
176 kfree(pool->free_map);
177 pool->free_map = NULL;
181 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
182 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
184 for(i = 0; i < pool->size; ++i) {
185 pool->free_map[i] = i;
188 atomic_set(&pool->available, 0);
189 pool->producer_index = 0;
190 pool->consumer_index = 0;
195 /* replenish the buffers for a pool. note that we don't need to
196 * skb_reserve these since they are used for incoming...
198 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
201 u32 count = pool->size - atomic_read(&pool->available);
202 u32 buffers_added = 0;
206 for(i = 0; i < count; ++i) {
208 unsigned int free_index, index;
210 union ibmveth_buf_desc desc;
211 unsigned long lpar_rc;
214 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
217 ibmveth_debug_printk("replenish: unable to allocate skb\n");
218 adapter->replenish_no_mem++;
222 free_index = pool->consumer_index;
223 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
224 index = pool->free_map[free_index];
226 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
227 ibmveth_assert(pool->skbuff[index] == NULL);
229 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
230 pool->buff_size, DMA_FROM_DEVICE);
232 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
233 pool->dma_addr[index] = dma_addr;
234 pool->skbuff[index] = skb;
236 correlator = ((u64)pool->index << 32) | index;
237 *(u64*)skb->data = correlator;
240 desc.fields.valid = 1;
241 desc.fields.length = pool->buff_size;
242 desc.fields.address = dma_addr;
244 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
246 if(lpar_rc != H_SUCCESS) {
247 pool->free_map[free_index] = index;
248 pool->skbuff[index] = NULL;
249 if (pool->consumer_index == 0)
250 pool->consumer_index = pool->size - 1;
252 pool->consumer_index--;
253 dma_unmap_single(&adapter->vdev->dev,
254 pool->dma_addr[index], pool->buff_size,
256 dev_kfree_skb_any(skb);
257 adapter->replenish_add_buff_failure++;
261 adapter->replenish_add_buff_success++;
266 atomic_add(buffers_added, &(pool->available));
269 /* replenish routine */
270 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
274 adapter->replenish_task_cycles++;
276 for(i = 0; i < IbmVethNumBufferPools; i++)
277 if(adapter->rx_buff_pool[i].active)
278 ibmveth_replenish_buffer_pool(adapter,
279 &adapter->rx_buff_pool[i]);
281 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
284 /* empty and free ana buffer pool - also used to do cleanup in error paths */
285 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
289 kfree(pool->free_map);
290 pool->free_map = NULL;
292 if(pool->skbuff && pool->dma_addr) {
293 for(i = 0; i < pool->size; ++i) {
294 struct sk_buff *skb = pool->skbuff[i];
296 dma_unmap_single(&adapter->vdev->dev,
300 dev_kfree_skb_any(skb);
301 pool->skbuff[i] = NULL;
307 kfree(pool->dma_addr);
308 pool->dma_addr = NULL;
317 /* remove a buffer from a pool */
318 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
320 unsigned int pool = correlator >> 32;
321 unsigned int index = correlator & 0xffffffffUL;
322 unsigned int free_index;
325 ibmveth_assert(pool < IbmVethNumBufferPools);
326 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
328 skb = adapter->rx_buff_pool[pool].skbuff[index];
330 ibmveth_assert(skb != NULL);
332 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
334 dma_unmap_single(&adapter->vdev->dev,
335 adapter->rx_buff_pool[pool].dma_addr[index],
336 adapter->rx_buff_pool[pool].buff_size,
339 free_index = adapter->rx_buff_pool[pool].producer_index;
340 adapter->rx_buff_pool[pool].producer_index
341 = (adapter->rx_buff_pool[pool].producer_index + 1)
342 % adapter->rx_buff_pool[pool].size;
343 adapter->rx_buff_pool[pool].free_map[free_index] = index;
347 atomic_dec(&(adapter->rx_buff_pool[pool].available));
350 /* get the current buffer on the rx queue */
351 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
353 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
354 unsigned int pool = correlator >> 32;
355 unsigned int index = correlator & 0xffffffffUL;
357 ibmveth_assert(pool < IbmVethNumBufferPools);
358 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
360 return adapter->rx_buff_pool[pool].skbuff[index];
363 /* recycle the current buffer on the rx queue */
364 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
366 u32 q_index = adapter->rx_queue.index;
367 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
368 unsigned int pool = correlator >> 32;
369 unsigned int index = correlator & 0xffffffffUL;
370 union ibmveth_buf_desc desc;
371 unsigned long lpar_rc;
373 ibmveth_assert(pool < IbmVethNumBufferPools);
374 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
376 if(!adapter->rx_buff_pool[pool].active) {
377 ibmveth_rxq_harvest_buffer(adapter);
378 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
383 desc.fields.valid = 1;
384 desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
385 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
387 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
389 if(lpar_rc != H_SUCCESS) {
390 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
391 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
394 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
395 adapter->rx_queue.index = 0;
396 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
400 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
402 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
404 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
405 adapter->rx_queue.index = 0;
406 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
410 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
414 if(adapter->buffer_list_addr != NULL) {
415 if(!dma_mapping_error(adapter->buffer_list_dma)) {
416 dma_unmap_single(&adapter->vdev->dev,
417 adapter->buffer_list_dma, 4096,
419 adapter->buffer_list_dma = DMA_ERROR_CODE;
421 free_page((unsigned long)adapter->buffer_list_addr);
422 adapter->buffer_list_addr = NULL;
425 if(adapter->filter_list_addr != NULL) {
426 if(!dma_mapping_error(adapter->filter_list_dma)) {
427 dma_unmap_single(&adapter->vdev->dev,
428 adapter->filter_list_dma, 4096,
430 adapter->filter_list_dma = DMA_ERROR_CODE;
432 free_page((unsigned long)adapter->filter_list_addr);
433 adapter->filter_list_addr = NULL;
436 if(adapter->rx_queue.queue_addr != NULL) {
437 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
438 dma_unmap_single(&adapter->vdev->dev,
439 adapter->rx_queue.queue_dma,
440 adapter->rx_queue.queue_len,
442 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
444 kfree(adapter->rx_queue.queue_addr);
445 adapter->rx_queue.queue_addr = NULL;
448 for(i = 0; i<IbmVethNumBufferPools; i++)
449 if (adapter->rx_buff_pool[i].active)
450 ibmveth_free_buffer_pool(adapter,
451 &adapter->rx_buff_pool[i]);
454 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
455 union ibmveth_buf_desc rxq_desc, u64 mac_address)
457 int rc, try_again = 1;
459 /* After a kexec the adapter will still be open, so our attempt to
460 * open it will fail. So if we get a failure we free the adapter and
461 * try again, but only once. */
463 rc = h_register_logical_lan(adapter->vdev->unit_address,
464 adapter->buffer_list_dma, rxq_desc.desc,
465 adapter->filter_list_dma, mac_address);
467 if (rc != H_SUCCESS && try_again) {
469 rc = h_free_logical_lan(adapter->vdev->unit_address);
470 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
479 static int ibmveth_open(struct net_device *netdev)
481 struct ibmveth_adapter *adapter = netdev->priv;
484 unsigned long lpar_rc;
486 union ibmveth_buf_desc rxq_desc;
489 ibmveth_debug_printk("open starting\n");
491 napi_enable(&adapter->napi);
493 for(i = 0; i<IbmVethNumBufferPools; i++)
494 rxq_entries += adapter->rx_buff_pool[i].size;
496 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
497 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
499 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
500 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
501 ibmveth_cleanup(adapter);
502 napi_disable(&adapter->napi);
506 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
507 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
509 if(!adapter->rx_queue.queue_addr) {
510 ibmveth_error_printk("unable to allocate rx queue pages\n");
511 ibmveth_cleanup(adapter);
512 napi_disable(&adapter->napi);
516 adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev,
517 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
518 adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev,
519 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
520 adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev,
521 adapter->rx_queue.queue_addr,
522 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
524 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
525 (dma_mapping_error(adapter->filter_list_dma)) ||
526 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
527 ibmveth_error_printk("unable to map filter or buffer list pages\n");
528 ibmveth_cleanup(adapter);
529 napi_disable(&adapter->napi);
533 adapter->rx_queue.index = 0;
534 adapter->rx_queue.num_slots = rxq_entries;
535 adapter->rx_queue.toggle = 1;
537 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
538 mac_address = mac_address >> 16;
541 rxq_desc.fields.valid = 1;
542 rxq_desc.fields.length = adapter->rx_queue.queue_len;
543 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
545 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
546 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
547 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
549 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
551 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
553 if(lpar_rc != H_SUCCESS) {
554 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
555 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
556 adapter->buffer_list_dma,
557 adapter->filter_list_dma,
560 ibmveth_cleanup(adapter);
561 napi_disable(&adapter->napi);
565 for(i = 0; i<IbmVethNumBufferPools; i++) {
566 if(!adapter->rx_buff_pool[i].active)
568 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
569 ibmveth_error_printk("unable to alloc pool\n");
570 adapter->rx_buff_pool[i].active = 0;
571 ibmveth_cleanup(adapter);
572 napi_disable(&adapter->napi);
577 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
578 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
579 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
581 rc = h_free_logical_lan(adapter->vdev->unit_address);
582 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
584 ibmveth_cleanup(adapter);
585 napi_disable(&adapter->napi);
589 ibmveth_debug_printk("initial replenish cycle\n");
590 ibmveth_interrupt(netdev->irq, netdev);
592 netif_start_queue(netdev);
594 ibmveth_debug_printk("open complete\n");
599 static int ibmveth_close(struct net_device *netdev)
601 struct ibmveth_adapter *adapter = netdev->priv;
604 ibmveth_debug_printk("close starting\n");
606 napi_disable(&adapter->napi);
608 if (!adapter->pool_config)
609 netif_stop_queue(netdev);
611 free_irq(netdev->irq, netdev);
614 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
615 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
617 if(lpar_rc != H_SUCCESS)
619 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
623 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
625 ibmveth_cleanup(adapter);
627 ibmveth_debug_printk("close complete\n");
632 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
633 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
634 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
635 cmd->speed = SPEED_1000;
636 cmd->duplex = DUPLEX_FULL;
637 cmd->port = PORT_FIBRE;
638 cmd->phy_address = 0;
639 cmd->transceiver = XCVR_INTERNAL;
640 cmd->autoneg = AUTONEG_ENABLE;
646 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
647 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
648 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
651 static u32 netdev_get_link(struct net_device *dev) {
655 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
657 struct ibmveth_adapter *adapter = dev->priv;
660 adapter->rx_csum = 1;
663 * Since the ibmveth firmware interface does not have the concept of
664 * separate tx/rx checksum offload enable, if rx checksum is disabled
665 * we also have to disable tx checksum offload. Once we disable rx
666 * checksum offload, we are no longer allowed to send tx buffers that
667 * are not properly checksummed.
669 adapter->rx_csum = 0;
670 dev->features &= ~NETIF_F_IP_CSUM;
674 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
676 struct ibmveth_adapter *adapter = dev->priv;
679 dev->features |= NETIF_F_IP_CSUM;
680 adapter->rx_csum = 1;
682 dev->features &= ~NETIF_F_IP_CSUM;
685 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
686 void (*done) (struct net_device *, u32))
688 struct ibmveth_adapter *adapter = dev->priv;
689 union ibmveth_illan_attributes set_attr, clr_attr, ret_attr;
691 int rc1 = 0, rc2 = 0;
694 if (netif_running(dev)) {
696 adapter->pool_config = 1;
698 adapter->pool_config = 0;
705 set_attr.fields.tcp_csum_offload_ipv4 = 1;
707 clr_attr.fields.tcp_csum_offload_ipv4 = 1;
709 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr.desc);
711 if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
712 !ret_attr.fields.trunk_priority &&
713 ret_attr.fields.csum_offload_padded_pkt_support) {
714 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr.desc,
715 set_attr.desc, &ret_attr.desc);
717 if (ret != H_SUCCESS) {
719 ibmveth_error_printk("unable to change checksum offload settings."
720 " %d rc=%ld\n", data, ret);
722 ret = h_illan_attributes(adapter->vdev->unit_address,
723 set_attr.desc, clr_attr.desc, &ret_attr.desc);
728 ibmveth_error_printk("unable to change checksum offload settings."
729 " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr.desc);
733 rc2 = ibmveth_open(dev);
735 return rc1 ? rc1 : rc2;
738 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
740 struct ibmveth_adapter *adapter = dev->priv;
742 if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
745 return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
748 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
750 struct ibmveth_adapter *adapter = dev->priv;
753 if (data && (dev->features & NETIF_F_IP_CSUM))
755 if (!data && !(dev->features & NETIF_F_IP_CSUM))
758 if (data && !adapter->rx_csum)
759 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
761 ibmveth_set_tx_csum_flags(dev, data);
766 static u32 ibmveth_get_rx_csum(struct net_device *dev)
768 struct ibmveth_adapter *adapter = dev->priv;
769 return adapter->rx_csum;
772 static const struct ethtool_ops netdev_ethtool_ops = {
773 .get_drvinfo = netdev_get_drvinfo,
774 .get_settings = netdev_get_settings,
775 .get_link = netdev_get_link,
776 .get_sg = ethtool_op_get_sg,
777 .get_tx_csum = ethtool_op_get_tx_csum,
778 .set_tx_csum = ibmveth_set_tx_csum,
779 .get_rx_csum = ibmveth_get_rx_csum,
780 .set_rx_csum = ibmveth_set_rx_csum,
783 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
788 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
790 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
792 struct ibmveth_adapter *adapter = netdev->priv;
793 union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
794 unsigned long lpar_rc;
795 int nfrags = 0, curfrag;
796 unsigned long correlator;
798 unsigned int retry_count;
799 unsigned int tx_dropped = 0;
800 unsigned int tx_bytes = 0;
801 unsigned int tx_packets = 0;
802 unsigned int tx_send_failed = 0;
803 unsigned int tx_map_failed = 0;
806 if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
811 memset(&desc, 0, sizeof(desc));
813 /* nfrags = number of frags after the initial fragment */
814 nfrags = skb_shinfo(skb)->nr_frags;
817 adapter->tx_multidesc_send++;
819 /* map the initial fragment */
820 desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
821 desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
822 desc[0].fields.length, DMA_TO_DEVICE);
823 desc[0].fields.valid = 1;
825 if (skb->ip_summed == CHECKSUM_PARTIAL &&
826 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
827 ibmveth_error_printk("tx: failed to checksum packet\n");
832 if (skb->ip_summed == CHECKSUM_PARTIAL) {
833 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
835 desc[0].fields.no_csum = 1;
836 desc[0].fields.csum_good = 1;
838 /* Need to zero out the checksum */
843 if(dma_mapping_error(desc[0].fields.address)) {
844 ibmveth_error_printk("tx: unable to map initial fragment\n");
852 /* map fragments past the initial portion if there are any */
854 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
855 desc[curfrag+1].fields.address
856 = dma_map_single(&adapter->vdev->dev,
857 page_address(frag->page) + frag->page_offset,
858 frag->size, DMA_TO_DEVICE);
859 desc[curfrag+1].fields.length = frag->size;
860 desc[curfrag+1].fields.valid = 1;
861 if (skb->ip_summed == CHECKSUM_PARTIAL) {
862 desc[curfrag+1].fields.no_csum = 1;
863 desc[curfrag+1].fields.csum_good = 1;
866 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
867 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
870 /* Free all the mappings we just created */
871 while(curfrag < nfrags) {
872 dma_unmap_single(&adapter->vdev->dev,
873 desc[curfrag+1].fields.address,
874 desc[curfrag+1].fields.length,
882 /* send the frame. Arbitrarily set retrycount to 1024 */
886 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
895 } while ((lpar_rc == H_BUSY) && (retry_count--));
897 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
899 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
900 for(i = 0; i < 6; i++) {
901 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
902 desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
908 tx_bytes += skb->len;
909 netdev->trans_start = jiffies;
913 dma_unmap_single(&adapter->vdev->dev,
914 desc[nfrags].fields.address,
915 desc[nfrags].fields.length, DMA_TO_DEVICE);
916 } while(--nfrags >= 0);
918 out: spin_lock_irqsave(&adapter->stats_lock, flags);
919 adapter->stats.tx_dropped += tx_dropped;
920 adapter->stats.tx_bytes += tx_bytes;
921 adapter->stats.tx_packets += tx_packets;
922 adapter->tx_send_failed += tx_send_failed;
923 adapter->tx_map_failed += tx_map_failed;
924 spin_unlock_irqrestore(&adapter->stats_lock, flags);
930 static int ibmveth_poll(struct napi_struct *napi, int budget)
932 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
933 struct net_device *netdev = adapter->netdev;
934 int frames_processed = 0;
935 unsigned long lpar_rc;
941 if (!ibmveth_rxq_pending_buffer(adapter))
945 if (!ibmveth_rxq_buffer_valid(adapter)) {
946 wmb(); /* suggested by larson1 */
947 adapter->rx_invalid_buffer++;
948 ibmveth_debug_printk("recycling invalid buffer\n");
949 ibmveth_rxq_recycle_buffer(adapter);
951 int length = ibmveth_rxq_frame_length(adapter);
952 int offset = ibmveth_rxq_frame_offset(adapter);
953 int csum_good = ibmveth_rxq_csum_good(adapter);
955 skb = ibmveth_rxq_get_buffer(adapter);
957 skb->ip_summed = CHECKSUM_UNNECESSARY;
959 ibmveth_rxq_harvest_buffer(adapter);
961 skb_reserve(skb, offset);
962 skb_put(skb, length);
963 skb->protocol = eth_type_trans(skb, netdev);
965 netif_receive_skb(skb); /* send it up */
967 adapter->stats.rx_packets++;
968 adapter->stats.rx_bytes += length;
970 netdev->last_rx = jiffies;
972 } while (frames_processed < budget);
974 ibmveth_replenish_task(adapter);
976 if (frames_processed < budget) {
977 /* We think we are done - reenable interrupts,
978 * then check once more to make sure we are done.
980 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
983 ibmveth_assert(lpar_rc == H_SUCCESS);
985 netif_rx_complete(netdev, napi);
987 if (ibmveth_rxq_pending_buffer(adapter) &&
988 netif_rx_reschedule(netdev, napi)) {
989 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
995 return frames_processed;
998 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1000 struct net_device *netdev = dev_instance;
1001 struct ibmveth_adapter *adapter = netdev->priv;
1002 unsigned long lpar_rc;
1004 if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1005 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1007 ibmveth_assert(lpar_rc == H_SUCCESS);
1008 __netif_rx_schedule(netdev, &adapter->napi);
1013 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
1015 struct ibmveth_adapter *adapter = dev->priv;
1016 return &adapter->stats;
1019 static void ibmveth_set_multicast_list(struct net_device *netdev)
1021 struct ibmveth_adapter *adapter = netdev->priv;
1022 unsigned long lpar_rc;
1024 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
1025 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1026 IbmVethMcastEnableRecv |
1027 IbmVethMcastDisableFiltering,
1029 if(lpar_rc != H_SUCCESS) {
1030 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1033 struct dev_mc_list *mclist = netdev->mc_list;
1035 /* clear the filter table & disable filtering */
1036 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1037 IbmVethMcastEnableRecv |
1038 IbmVethMcastDisableFiltering |
1039 IbmVethMcastClearFilterTable,
1041 if(lpar_rc != H_SUCCESS) {
1042 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1044 /* add the addresses to the filter table */
1045 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
1046 // add the multicast address to the filter table
1047 unsigned long mcast_addr = 0;
1048 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
1049 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1050 IbmVethMcastAddFilter,
1052 if(lpar_rc != H_SUCCESS) {
1053 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1057 /* re-enable filtering */
1058 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1059 IbmVethMcastEnableFiltering,
1061 if(lpar_rc != H_SUCCESS) {
1062 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1067 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1069 struct ibmveth_adapter *adapter = dev->priv;
1070 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1074 if (new_mtu < IBMVETH_MAX_MTU)
1077 for (i = 0; i < IbmVethNumBufferPools; i++)
1078 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1081 if (i == IbmVethNumBufferPools)
1084 /* Look for an active buffer pool that can hold the new MTU */
1085 for(i = 0; i<IbmVethNumBufferPools; i++) {
1086 if (!adapter->rx_buff_pool[i].active) {
1087 adapter->rx_buff_pool[i].active = 1;
1091 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1092 if (reinit && netif_running(adapter->netdev)) {
1093 adapter->pool_config = 1;
1094 ibmveth_close(adapter->netdev);
1095 adapter->pool_config = 0;
1097 if ((rc = ibmveth_open(adapter->netdev)))
1107 #ifdef CONFIG_NET_POLL_CONTROLLER
1108 static void ibmveth_poll_controller(struct net_device *dev)
1110 ibmveth_replenish_task(dev->priv);
1111 ibmveth_interrupt(dev->irq, dev);
1115 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1119 struct net_device *netdev;
1120 struct ibmveth_adapter *adapter;
1121 union ibmveth_illan_attributes set_attr, ret_attr;
1123 unsigned char *mac_addr_p;
1124 unsigned int *mcastFilterSize_p;
1127 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1130 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1131 VETH_MAC_ADDR, NULL);
1133 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1134 "attribute\n", __FILE__, __LINE__);
1138 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1139 VETH_MCAST_FILTER_SIZE, NULL);
1140 if(!mcastFilterSize_p) {
1141 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1142 "VETH_MCAST_FILTER_SIZE attribute\n",
1143 __FILE__, __LINE__);
1147 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1152 SET_MODULE_OWNER(netdev);
1154 adapter = netdev->priv;
1155 dev->dev.driver_data = netdev;
1157 adapter->vdev = dev;
1158 adapter->netdev = netdev;
1159 adapter->mcastFilterSize= *mcastFilterSize_p;
1160 adapter->pool_config = 0;
1162 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1164 /* Some older boxes running PHYP non-natively have an OF that
1165 returns a 8-byte local-mac-address field (and the first
1166 2 bytes have to be ignored) while newer boxes' OF return
1167 a 6-byte field. Note that IEEE 1275 specifies that
1168 local-mac-address must be a 6-byte field.
1169 The RPA doc specifies that the first byte must be 10b, so
1170 we'll just look for it to solve this 8 vs. 6 byte field issue */
1172 if ((*mac_addr_p & 0x3) != 0x02)
1175 adapter->mac_addr = 0;
1176 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1178 netdev->irq = dev->irq;
1179 netdev->open = ibmveth_open;
1180 netdev->stop = ibmveth_close;
1181 netdev->hard_start_xmit = ibmveth_start_xmit;
1182 netdev->get_stats = ibmveth_get_stats;
1183 netdev->set_multicast_list = ibmveth_set_multicast_list;
1184 netdev->do_ioctl = ibmveth_ioctl;
1185 netdev->ethtool_ops = &netdev_ethtool_ops;
1186 netdev->change_mtu = ibmveth_change_mtu;
1187 SET_NETDEV_DEV(netdev, &dev->dev);
1188 #ifdef CONFIG_NET_POLL_CONTROLLER
1189 netdev->poll_controller = ibmveth_poll_controller;
1191 netdev->features |= NETIF_F_LLTX;
1192 spin_lock_init(&adapter->stats_lock);
1194 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1196 for(i = 0; i<IbmVethNumBufferPools; i++) {
1197 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1198 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1199 pool_count[i], pool_size[i],
1201 kobj->parent = &dev->dev.kobj;
1202 sprintf(kobj->name, "pool%d", i);
1203 kobj->ktype = &ktype_veth_pool;
1204 kobject_register(kobj);
1207 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1209 adapter->buffer_list_dma = DMA_ERROR_CODE;
1210 adapter->filter_list_dma = DMA_ERROR_CODE;
1211 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1213 ibmveth_debug_printk("registering netdev...\n");
1215 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc);
1217 if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
1218 !ret_attr.fields.trunk_priority &&
1219 ret_attr.fields.csum_offload_padded_pkt_support) {
1221 set_attr.fields.tcp_csum_offload_ipv4 = 1;
1223 ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc,
1226 if (ret == H_SUCCESS) {
1227 adapter->rx_csum = 1;
1228 netdev->features |= NETIF_F_IP_CSUM;
1230 ret = h_illan_attributes(dev->unit_address, set_attr.desc,
1234 rc = register_netdev(netdev);
1237 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1238 free_netdev(netdev);
1242 ibmveth_debug_printk("registered\n");
1244 ibmveth_proc_register_adapter(adapter);
1249 static int __devexit ibmveth_remove(struct vio_dev *dev)
1251 struct net_device *netdev = dev->dev.driver_data;
1252 struct ibmveth_adapter *adapter = netdev->priv;
1255 for(i = 0; i<IbmVethNumBufferPools; i++)
1256 kobject_unregister(&adapter->rx_buff_pool[i].kobj);
1258 unregister_netdev(netdev);
1260 ibmveth_proc_unregister_adapter(adapter);
1262 free_netdev(netdev);
1266 #ifdef CONFIG_PROC_FS
1267 static void ibmveth_proc_register_driver(void)
1269 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1270 if (ibmveth_proc_dir) {
1271 SET_MODULE_OWNER(ibmveth_proc_dir);
1275 static void ibmveth_proc_unregister_driver(void)
1277 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1280 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1289 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1295 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1299 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1301 struct ibmveth_adapter *adapter = seq->private;
1302 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1303 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1305 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1307 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1308 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1309 current_mac[0], current_mac[1], current_mac[2],
1310 current_mac[3], current_mac[4], current_mac[5]);
1311 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1312 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1313 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1315 seq_printf(seq, "\nAdapter Statistics:\n");
1316 seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
1317 seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
1318 seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
1319 seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
1320 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1321 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1322 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1323 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1324 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1325 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1329 static struct seq_operations ibmveth_seq_ops = {
1330 .start = ibmveth_seq_start,
1331 .next = ibmveth_seq_next,
1332 .stop = ibmveth_seq_stop,
1333 .show = ibmveth_seq_show,
1336 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1338 struct seq_file *seq;
1339 struct proc_dir_entry *proc;
1342 rc = seq_open(file, &ibmveth_seq_ops);
1344 /* recover the pointer buried in proc_dir_entry data */
1345 seq = file->private_data;
1347 seq->private = proc->data;
1352 static const struct file_operations ibmveth_proc_fops = {
1353 .owner = THIS_MODULE,
1354 .open = ibmveth_proc_open,
1356 .llseek = seq_lseek,
1357 .release = seq_release,
1360 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1362 struct proc_dir_entry *entry;
1363 if (ibmveth_proc_dir) {
1365 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1366 entry = create_proc_entry(u_addr, S_IFREG, ibmveth_proc_dir);
1368 ibmveth_error_printk("Cannot create adapter proc entry");
1370 entry->data = (void *) adapter;
1371 entry->proc_fops = &ibmveth_proc_fops;
1372 SET_MODULE_OWNER(entry);
1378 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1380 if (ibmveth_proc_dir) {
1382 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1383 remove_proc_entry(u_addr, ibmveth_proc_dir);
1387 #else /* CONFIG_PROC_FS */
1388 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1392 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1395 static void ibmveth_proc_register_driver(void)
1399 static void ibmveth_proc_unregister_driver(void)
1402 #endif /* CONFIG_PROC_FS */
1404 static struct attribute veth_active_attr;
1405 static struct attribute veth_num_attr;
1406 static struct attribute veth_size_attr;
1408 static ssize_t veth_pool_show(struct kobject * kobj,
1409 struct attribute * attr, char * buf)
1411 struct ibmveth_buff_pool *pool = container_of(kobj,
1412 struct ibmveth_buff_pool,
1415 if (attr == &veth_active_attr)
1416 return sprintf(buf, "%d\n", pool->active);
1417 else if (attr == &veth_num_attr)
1418 return sprintf(buf, "%d\n", pool->size);
1419 else if (attr == &veth_size_attr)
1420 return sprintf(buf, "%d\n", pool->buff_size);
1424 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1425 const char * buf, size_t count)
1427 struct ibmveth_buff_pool *pool = container_of(kobj,
1428 struct ibmveth_buff_pool,
1430 struct net_device *netdev =
1431 container_of(kobj->parent, struct device, kobj)->driver_data;
1432 struct ibmveth_adapter *adapter = netdev->priv;
1433 long value = simple_strtol(buf, NULL, 10);
1436 if (attr == &veth_active_attr) {
1437 if (value && !pool->active) {
1438 if (netif_running(netdev)) {
1439 if(ibmveth_alloc_buffer_pool(pool)) {
1440 ibmveth_error_printk("unable to alloc pool\n");
1444 adapter->pool_config = 1;
1445 ibmveth_close(netdev);
1446 adapter->pool_config = 0;
1447 if ((rc = ibmveth_open(netdev)))
1451 } else if (!value && pool->active) {
1452 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1454 /* Make sure there is a buffer pool with buffers that
1455 can hold a packet of the size of the MTU */
1456 for (i = 0; i < IbmVethNumBufferPools; i++) {
1457 if (pool == &adapter->rx_buff_pool[i])
1459 if (!adapter->rx_buff_pool[i].active)
1461 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1465 if (i == IbmVethNumBufferPools) {
1466 ibmveth_error_printk("no active pool >= MTU\n");
1471 if (netif_running(netdev)) {
1472 adapter->pool_config = 1;
1473 ibmveth_close(netdev);
1474 adapter->pool_config = 0;
1475 if ((rc = ibmveth_open(netdev)))
1479 } else if (attr == &veth_num_attr) {
1480 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1483 if (netif_running(netdev)) {
1484 adapter->pool_config = 1;
1485 ibmveth_close(netdev);
1486 adapter->pool_config = 0;
1488 if ((rc = ibmveth_open(netdev)))
1493 } else if (attr == &veth_size_attr) {
1494 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1497 if (netif_running(netdev)) {
1498 adapter->pool_config = 1;
1499 ibmveth_close(netdev);
1500 adapter->pool_config = 0;
1501 pool->buff_size = value;
1502 if ((rc = ibmveth_open(netdev)))
1505 pool->buff_size = value;
1509 /* kick the interrupt handler to allocate/deallocate pools */
1510 ibmveth_interrupt(netdev->irq, netdev);
1515 #define ATTR(_name, _mode) \
1516 struct attribute veth_##_name##_attr = { \
1517 .name = __stringify(_name), .mode = _mode, \
1520 static ATTR(active, 0644);
1521 static ATTR(num, 0644);
1522 static ATTR(size, 0644);
1524 static struct attribute * veth_pool_attrs[] = {
1531 static struct sysfs_ops veth_pool_ops = {
1532 .show = veth_pool_show,
1533 .store = veth_pool_store,
1536 static struct kobj_type ktype_veth_pool = {
1538 .sysfs_ops = &veth_pool_ops,
1539 .default_attrs = veth_pool_attrs,
1543 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1544 { "network", "IBM,l-lan"},
1547 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1549 static struct vio_driver ibmveth_driver = {
1550 .id_table = ibmveth_device_table,
1551 .probe = ibmveth_probe,
1552 .remove = ibmveth_remove,
1554 .name = ibmveth_driver_name,
1555 .owner = THIS_MODULE,
1559 static int __init ibmveth_module_init(void)
1561 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1563 ibmveth_proc_register_driver();
1565 return vio_register_driver(&ibmveth_driver);
1568 static void __exit ibmveth_module_exit(void)
1570 vio_unregister_driver(&ibmveth_driver);
1571 ibmveth_proc_unregister_driver();
1574 module_init(ibmveth_module_init);
1575 module_exit(ibmveth_module_exit);