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 - add support for sysfs
32 - possibly remove procfs support
35 #include <linux/module.h>
36 #include <linux/moduleparam.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>
49 #include <linux/ethtool.h>
50 #include <linux/proc_fs.h>
53 #include <linux/slab.h>
54 #include <net/net_namespace.h>
55 #include <asm/hvcall.h>
56 #include <asm/atomic.h>
58 #include <asm/iommu.h>
59 #include <asm/uaccess.h>
60 #include <asm/firmware.h>
61 #include <linux/seq_file.h>
67 #define ibmveth_printk(fmt, args...) \
68 printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
70 #define ibmveth_error_printk(fmt, args...) \
71 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
74 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
75 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
76 #define ibmveth_debug_printk(fmt, args...) \
77 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
78 #define ibmveth_assert(expr) \
80 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
84 #define ibmveth_debug_printk_no_adapter(fmt, args...)
85 #define ibmveth_debug_printk(fmt, args...)
86 #define ibmveth_assert(expr)
89 static int ibmveth_open(struct net_device *dev);
90 static int ibmveth_close(struct net_device *dev);
91 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
92 static int ibmveth_poll(struct napi_struct *napi, int budget);
93 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
94 static void ibmveth_set_multicast_list(struct net_device *dev);
95 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
96 static void ibmveth_proc_register_driver(void);
97 static void ibmveth_proc_unregister_driver(void);
98 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
99 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
100 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
101 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
102 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
103 static struct kobj_type ktype_veth_pool;
106 #ifdef CONFIG_PROC_FS
107 #define IBMVETH_PROC_DIR "ibmveth"
108 static struct proc_dir_entry *ibmveth_proc_dir;
111 static const char ibmveth_driver_name[] = "ibmveth";
112 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
113 #define ibmveth_driver_version "1.03"
115 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
116 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
117 MODULE_LICENSE("GPL");
118 MODULE_VERSION(ibmveth_driver_version);
120 struct ibmveth_stat {
121 char name[ETH_GSTRING_LEN];
125 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
126 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
128 struct ibmveth_stat ibmveth_stats[] = {
129 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
130 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
131 { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
132 { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
133 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
134 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
135 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
136 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
139 /* simple methods of getting data from the current rxq entry */
140 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
142 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
145 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
147 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
150 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
152 return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
155 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
157 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
160 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
162 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
165 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
167 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
170 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
172 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
175 /* setup the initial settings for a buffer pool */
176 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
178 pool->size = pool_size;
179 pool->index = pool_index;
180 pool->buff_size = buff_size;
181 pool->threshold = pool_size / 2;
182 pool->active = pool_active;
185 /* allocate and setup an buffer pool - called during open */
186 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
190 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
192 if(!pool->free_map) {
196 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
197 if(!pool->dma_addr) {
198 kfree(pool->free_map);
199 pool->free_map = NULL;
203 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
206 kfree(pool->dma_addr);
207 pool->dma_addr = NULL;
209 kfree(pool->free_map);
210 pool->free_map = NULL;
214 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
215 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
217 for(i = 0; i < pool->size; ++i) {
218 pool->free_map[i] = i;
221 atomic_set(&pool->available, 0);
222 pool->producer_index = 0;
223 pool->consumer_index = 0;
228 /* replenish the buffers for a pool. note that we don't need to
229 * skb_reserve these since they are used for incoming...
231 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
234 u32 count = pool->size - atomic_read(&pool->available);
235 u32 buffers_added = 0;
237 unsigned int free_index, index;
239 unsigned long lpar_rc;
244 for(i = 0; i < count; ++i) {
245 union ibmveth_buf_desc desc;
247 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
250 ibmveth_debug_printk("replenish: unable to allocate skb\n");
251 adapter->replenish_no_mem++;
255 free_index = pool->consumer_index;
256 pool->consumer_index = (pool->consumer_index + 1) % pool->size;
257 index = pool->free_map[free_index];
259 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
260 ibmveth_assert(pool->skbuff[index] == NULL);
262 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
263 pool->buff_size, DMA_FROM_DEVICE);
265 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
268 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
269 pool->dma_addr[index] = dma_addr;
270 pool->skbuff[index] = skb;
272 correlator = ((u64)pool->index << 32) | index;
273 *(u64*)skb->data = correlator;
275 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
276 desc.fields.address = dma_addr;
278 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
280 if (lpar_rc != H_SUCCESS)
284 adapter->replenish_add_buff_success++;
289 atomic_add(buffers_added, &(pool->available));
293 pool->free_map[free_index] = index;
294 pool->skbuff[index] = NULL;
295 if (pool->consumer_index == 0)
296 pool->consumer_index = pool->size - 1;
298 pool->consumer_index--;
299 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
300 dma_unmap_single(&adapter->vdev->dev,
301 pool->dma_addr[index], pool->buff_size,
303 dev_kfree_skb_any(skb);
304 adapter->replenish_add_buff_failure++;
307 atomic_add(buffers_added, &(pool->available));
310 /* replenish routine */
311 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
315 adapter->replenish_task_cycles++;
317 for (i = (IbmVethNumBufferPools - 1); i >= 0; i--)
318 if(adapter->rx_buff_pool[i].active)
319 ibmveth_replenish_buffer_pool(adapter,
320 &adapter->rx_buff_pool[i]);
322 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
325 /* empty and free ana buffer pool - also used to do cleanup in error paths */
326 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
330 kfree(pool->free_map);
331 pool->free_map = NULL;
333 if(pool->skbuff && pool->dma_addr) {
334 for(i = 0; i < pool->size; ++i) {
335 struct sk_buff *skb = pool->skbuff[i];
337 dma_unmap_single(&adapter->vdev->dev,
341 dev_kfree_skb_any(skb);
342 pool->skbuff[i] = NULL;
348 kfree(pool->dma_addr);
349 pool->dma_addr = NULL;
358 /* remove a buffer from a pool */
359 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
361 unsigned int pool = correlator >> 32;
362 unsigned int index = correlator & 0xffffffffUL;
363 unsigned int free_index;
366 ibmveth_assert(pool < IbmVethNumBufferPools);
367 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
369 skb = adapter->rx_buff_pool[pool].skbuff[index];
371 ibmveth_assert(skb != NULL);
373 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
375 dma_unmap_single(&adapter->vdev->dev,
376 adapter->rx_buff_pool[pool].dma_addr[index],
377 adapter->rx_buff_pool[pool].buff_size,
380 free_index = adapter->rx_buff_pool[pool].producer_index;
381 adapter->rx_buff_pool[pool].producer_index
382 = (adapter->rx_buff_pool[pool].producer_index + 1)
383 % adapter->rx_buff_pool[pool].size;
384 adapter->rx_buff_pool[pool].free_map[free_index] = index;
388 atomic_dec(&(adapter->rx_buff_pool[pool].available));
391 /* get the current buffer on the rx queue */
392 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
394 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
395 unsigned int pool = correlator >> 32;
396 unsigned int index = correlator & 0xffffffffUL;
398 ibmveth_assert(pool < IbmVethNumBufferPools);
399 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
401 return adapter->rx_buff_pool[pool].skbuff[index];
404 /* recycle the current buffer on the rx queue */
405 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
407 u32 q_index = adapter->rx_queue.index;
408 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
409 unsigned int pool = correlator >> 32;
410 unsigned int index = correlator & 0xffffffffUL;
411 union ibmveth_buf_desc desc;
412 unsigned long lpar_rc;
414 ibmveth_assert(pool < IbmVethNumBufferPools);
415 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
417 if(!adapter->rx_buff_pool[pool].active) {
418 ibmveth_rxq_harvest_buffer(adapter);
419 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
423 desc.fields.flags_len = IBMVETH_BUF_VALID |
424 adapter->rx_buff_pool[pool].buff_size;
425 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
427 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
429 if(lpar_rc != H_SUCCESS) {
430 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
431 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
434 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
435 adapter->rx_queue.index = 0;
436 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
440 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
442 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
444 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
445 adapter->rx_queue.index = 0;
446 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
450 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
453 struct device *dev = &adapter->vdev->dev;
455 if(adapter->buffer_list_addr != NULL) {
456 if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
457 dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
459 adapter->buffer_list_dma = DMA_ERROR_CODE;
461 free_page((unsigned long)adapter->buffer_list_addr);
462 adapter->buffer_list_addr = NULL;
465 if(adapter->filter_list_addr != NULL) {
466 if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
467 dma_unmap_single(dev, adapter->filter_list_dma, 4096,
469 adapter->filter_list_dma = DMA_ERROR_CODE;
471 free_page((unsigned long)adapter->filter_list_addr);
472 adapter->filter_list_addr = NULL;
475 if(adapter->rx_queue.queue_addr != NULL) {
476 if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
477 dma_unmap_single(dev,
478 adapter->rx_queue.queue_dma,
479 adapter->rx_queue.queue_len,
481 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
483 kfree(adapter->rx_queue.queue_addr);
484 adapter->rx_queue.queue_addr = NULL;
487 for(i = 0; i<IbmVethNumBufferPools; i++)
488 if (adapter->rx_buff_pool[i].active)
489 ibmveth_free_buffer_pool(adapter,
490 &adapter->rx_buff_pool[i]);
492 if (adapter->bounce_buffer != NULL) {
493 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
494 dma_unmap_single(&adapter->vdev->dev,
495 adapter->bounce_buffer_dma,
496 adapter->netdev->mtu + IBMVETH_BUFF_OH,
498 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
500 kfree(adapter->bounce_buffer);
501 adapter->bounce_buffer = NULL;
505 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
506 union ibmveth_buf_desc rxq_desc, u64 mac_address)
508 int rc, try_again = 1;
510 /* After a kexec the adapter will still be open, so our attempt to
511 * open it will fail. So if we get a failure we free the adapter and
512 * try again, but only once. */
514 rc = h_register_logical_lan(adapter->vdev->unit_address,
515 adapter->buffer_list_dma, rxq_desc.desc,
516 adapter->filter_list_dma, mac_address);
518 if (rc != H_SUCCESS && try_again) {
520 rc = h_free_logical_lan(adapter->vdev->unit_address);
521 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
530 static int ibmveth_open(struct net_device *netdev)
532 struct ibmveth_adapter *adapter = netdev_priv(netdev);
535 unsigned long lpar_rc;
537 union ibmveth_buf_desc rxq_desc;
541 ibmveth_debug_printk("open starting\n");
543 napi_enable(&adapter->napi);
545 for(i = 0; i<IbmVethNumBufferPools; i++)
546 rxq_entries += adapter->rx_buff_pool[i].size;
548 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
549 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
551 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
552 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
553 ibmveth_cleanup(adapter);
554 napi_disable(&adapter->napi);
558 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
559 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
561 if(!adapter->rx_queue.queue_addr) {
562 ibmveth_error_printk("unable to allocate rx queue pages\n");
563 ibmveth_cleanup(adapter);
564 napi_disable(&adapter->napi);
568 dev = &adapter->vdev->dev;
570 adapter->buffer_list_dma = dma_map_single(dev,
571 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
572 adapter->filter_list_dma = dma_map_single(dev,
573 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
574 adapter->rx_queue.queue_dma = dma_map_single(dev,
575 adapter->rx_queue.queue_addr,
576 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
578 if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
579 (dma_mapping_error(dev, adapter->filter_list_dma)) ||
580 (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
581 ibmveth_error_printk("unable to map filter or buffer list pages\n");
582 ibmveth_cleanup(adapter);
583 napi_disable(&adapter->napi);
587 adapter->rx_queue.index = 0;
588 adapter->rx_queue.num_slots = rxq_entries;
589 adapter->rx_queue.toggle = 1;
591 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
592 mac_address = mac_address >> 16;
594 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
595 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
597 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
598 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
599 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
601 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
603 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
605 if(lpar_rc != H_SUCCESS) {
606 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
607 ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n",
608 adapter->buffer_list_dma,
609 adapter->filter_list_dma,
612 ibmveth_cleanup(adapter);
613 napi_disable(&adapter->napi);
617 for(i = 0; i<IbmVethNumBufferPools; i++) {
618 if(!adapter->rx_buff_pool[i].active)
620 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
621 ibmveth_error_printk("unable to alloc pool\n");
622 adapter->rx_buff_pool[i].active = 0;
623 ibmveth_cleanup(adapter);
624 napi_disable(&adapter->napi);
629 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
630 if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
631 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
633 rc = h_free_logical_lan(adapter->vdev->unit_address);
634 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
636 ibmveth_cleanup(adapter);
637 napi_disable(&adapter->napi);
641 adapter->bounce_buffer =
642 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
643 if (!adapter->bounce_buffer) {
644 ibmveth_error_printk("unable to allocate bounce buffer\n");
645 ibmveth_cleanup(adapter);
646 napi_disable(&adapter->napi);
649 adapter->bounce_buffer_dma =
650 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
651 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
652 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
653 ibmveth_error_printk("unable to map bounce buffer\n");
654 ibmveth_cleanup(adapter);
655 napi_disable(&adapter->napi);
659 ibmveth_debug_printk("initial replenish cycle\n");
660 ibmveth_interrupt(netdev->irq, netdev);
662 netif_start_queue(netdev);
664 ibmveth_debug_printk("open complete\n");
669 static int ibmveth_close(struct net_device *netdev)
671 struct ibmveth_adapter *adapter = netdev_priv(netdev);
674 ibmveth_debug_printk("close starting\n");
676 napi_disable(&adapter->napi);
678 if (!adapter->pool_config)
679 netif_stop_queue(netdev);
681 free_irq(netdev->irq, netdev);
684 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
685 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
687 if(lpar_rc != H_SUCCESS)
689 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
693 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
695 ibmveth_cleanup(adapter);
697 ibmveth_debug_printk("close complete\n");
702 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
703 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
704 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
705 cmd->speed = SPEED_1000;
706 cmd->duplex = DUPLEX_FULL;
707 cmd->port = PORT_FIBRE;
708 cmd->phy_address = 0;
709 cmd->transceiver = XCVR_INTERNAL;
710 cmd->autoneg = AUTONEG_ENABLE;
716 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
717 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
718 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
721 static u32 netdev_get_link(struct net_device *dev) {
725 static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
727 struct ibmveth_adapter *adapter = netdev_priv(dev);
730 adapter->rx_csum = 1;
733 * Since the ibmveth firmware interface does not have the concept of
734 * separate tx/rx checksum offload enable, if rx checksum is disabled
735 * we also have to disable tx checksum offload. Once we disable rx
736 * checksum offload, we are no longer allowed to send tx buffers that
737 * are not properly checksummed.
739 adapter->rx_csum = 0;
740 dev->features &= ~NETIF_F_IP_CSUM;
744 static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
746 struct ibmveth_adapter *adapter = netdev_priv(dev);
749 dev->features |= NETIF_F_IP_CSUM;
750 adapter->rx_csum = 1;
752 dev->features &= ~NETIF_F_IP_CSUM;
755 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
756 void (*done) (struct net_device *, u32))
758 struct ibmveth_adapter *adapter = netdev_priv(dev);
759 unsigned long set_attr, clr_attr, ret_attr;
761 int rc1 = 0, rc2 = 0;
764 if (netif_running(dev)) {
766 adapter->pool_config = 1;
768 adapter->pool_config = 0;
775 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
777 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
779 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
781 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
782 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
783 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
784 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
785 set_attr, &ret_attr);
787 if (ret != H_SUCCESS) {
789 ibmveth_error_printk("unable to change checksum offload settings."
790 " %d rc=%ld\n", data, ret);
792 ret = h_illan_attributes(adapter->vdev->unit_address,
793 set_attr, clr_attr, &ret_attr);
798 ibmveth_error_printk("unable to change checksum offload settings."
799 " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
803 rc2 = ibmveth_open(dev);
805 return rc1 ? rc1 : rc2;
808 static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
810 struct ibmveth_adapter *adapter = netdev_priv(dev);
812 if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
815 return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
818 static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
820 struct ibmveth_adapter *adapter = netdev_priv(dev);
823 if (data && (dev->features & NETIF_F_IP_CSUM))
825 if (!data && !(dev->features & NETIF_F_IP_CSUM))
828 if (data && !adapter->rx_csum)
829 rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
831 ibmveth_set_tx_csum_flags(dev, data);
836 static u32 ibmveth_get_rx_csum(struct net_device *dev)
838 struct ibmveth_adapter *adapter = netdev_priv(dev);
839 return adapter->rx_csum;
842 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
846 if (stringset != ETH_SS_STATS)
849 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
850 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
853 static int ibmveth_get_sset_count(struct net_device *dev, int sset)
857 return ARRAY_SIZE(ibmveth_stats);
863 static void ibmveth_get_ethtool_stats(struct net_device *dev,
864 struct ethtool_stats *stats, u64 *data)
867 struct ibmveth_adapter *adapter = netdev_priv(dev);
869 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
870 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
873 static const struct ethtool_ops netdev_ethtool_ops = {
874 .get_drvinfo = netdev_get_drvinfo,
875 .get_settings = netdev_get_settings,
876 .get_link = netdev_get_link,
877 .set_tx_csum = ibmveth_set_tx_csum,
878 .get_rx_csum = ibmveth_get_rx_csum,
879 .set_rx_csum = ibmveth_set_rx_csum,
880 .get_strings = ibmveth_get_strings,
881 .get_sset_count = ibmveth_get_sset_count,
882 .get_ethtool_stats = ibmveth_get_ethtool_stats,
885 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
890 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
892 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
893 struct net_device *netdev)
895 struct ibmveth_adapter *adapter = netdev_priv(netdev);
896 union ibmveth_buf_desc desc;
897 unsigned long lpar_rc;
898 unsigned long correlator;
900 unsigned int retry_count;
901 unsigned int tx_dropped = 0;
902 unsigned int tx_bytes = 0;
903 unsigned int tx_packets = 0;
904 unsigned int tx_send_failed = 0;
905 unsigned int tx_map_failed = 0;
907 unsigned long data_dma_addr;
909 desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
911 if (skb->ip_summed == CHECKSUM_PARTIAL &&
912 ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
913 ibmveth_error_printk("tx: failed to checksum packet\n");
918 if (skb->ip_summed == CHECKSUM_PARTIAL) {
919 unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
921 desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
923 /* Need to zero out the checksum */
928 data_dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
929 skb->len, DMA_TO_DEVICE);
930 if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) {
931 if (!firmware_has_feature(FW_FEATURE_CMO))
932 ibmveth_error_printk("tx: unable to map xmit buffer\n");
933 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
935 desc.fields.address = adapter->bounce_buffer_dma;
940 desc.fields.address = data_dma_addr;
942 /* send the frame. Arbitrarily set retrycount to 1024 */
946 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
947 desc.desc, 0, 0, 0, 0, 0,
948 correlator, &correlator);
949 } while ((lpar_rc == H_BUSY) && (retry_count--));
951 if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
952 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
953 ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
954 (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
955 skb->len, desc.fields.address);
960 tx_bytes += skb->len;
961 netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
965 dma_unmap_single(&adapter->vdev->dev, data_dma_addr,
966 skb->len, DMA_TO_DEVICE);
968 out: spin_lock_irqsave(&adapter->stats_lock, flags);
969 netdev->stats.tx_dropped += tx_dropped;
970 netdev->stats.tx_bytes += tx_bytes;
971 netdev->stats.tx_packets += tx_packets;
972 adapter->tx_send_failed += tx_send_failed;
973 adapter->tx_map_failed += tx_map_failed;
974 spin_unlock_irqrestore(&adapter->stats_lock, flags);
980 static int ibmveth_poll(struct napi_struct *napi, int budget)
982 struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
983 struct net_device *netdev = adapter->netdev;
984 int frames_processed = 0;
985 unsigned long lpar_rc;
991 if (!ibmveth_rxq_pending_buffer(adapter))
995 if (!ibmveth_rxq_buffer_valid(adapter)) {
996 wmb(); /* suggested by larson1 */
997 adapter->rx_invalid_buffer++;
998 ibmveth_debug_printk("recycling invalid buffer\n");
999 ibmveth_rxq_recycle_buffer(adapter);
1001 int length = ibmveth_rxq_frame_length(adapter);
1002 int offset = ibmveth_rxq_frame_offset(adapter);
1003 int csum_good = ibmveth_rxq_csum_good(adapter);
1005 skb = ibmveth_rxq_get_buffer(adapter);
1007 skb->ip_summed = CHECKSUM_UNNECESSARY;
1009 ibmveth_rxq_harvest_buffer(adapter);
1011 skb_reserve(skb, offset);
1012 skb_put(skb, length);
1013 skb->protocol = eth_type_trans(skb, netdev);
1015 netif_receive_skb(skb); /* send it up */
1017 netdev->stats.rx_packets++;
1018 netdev->stats.rx_bytes += length;
1021 } while (frames_processed < budget);
1023 ibmveth_replenish_task(adapter);
1025 if (frames_processed < budget) {
1026 /* We think we are done - reenable interrupts,
1027 * then check once more to make sure we are done.
1029 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1032 ibmveth_assert(lpar_rc == H_SUCCESS);
1034 napi_complete(napi);
1036 if (ibmveth_rxq_pending_buffer(adapter) &&
1037 napi_reschedule(napi)) {
1038 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1044 return frames_processed;
1047 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1049 struct net_device *netdev = dev_instance;
1050 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1051 unsigned long lpar_rc;
1053 if (napi_schedule_prep(&adapter->napi)) {
1054 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1056 ibmveth_assert(lpar_rc == H_SUCCESS);
1057 __napi_schedule(&adapter->napi);
1062 static void ibmveth_set_multicast_list(struct net_device *netdev)
1064 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1065 unsigned long lpar_rc;
1067 if ((netdev->flags & IFF_PROMISC) ||
1068 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
1069 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1070 IbmVethMcastEnableRecv |
1071 IbmVethMcastDisableFiltering,
1073 if(lpar_rc != H_SUCCESS) {
1074 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
1077 struct netdev_hw_addr *ha;
1078 /* clear the filter table & disable filtering */
1079 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1080 IbmVethMcastEnableRecv |
1081 IbmVethMcastDisableFiltering |
1082 IbmVethMcastClearFilterTable,
1084 if(lpar_rc != H_SUCCESS) {
1085 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
1087 /* add the addresses to the filter table */
1088 netdev_for_each_mc_addr(ha, netdev) {
1089 // add the multicast address to the filter table
1090 unsigned long mcast_addr = 0;
1091 memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
1092 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1093 IbmVethMcastAddFilter,
1095 if(lpar_rc != H_SUCCESS) {
1096 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
1100 /* re-enable filtering */
1101 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1102 IbmVethMcastEnableFiltering,
1104 if(lpar_rc != H_SUCCESS) {
1105 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
1110 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1112 struct ibmveth_adapter *adapter = netdev_priv(dev);
1113 struct vio_dev *viodev = adapter->vdev;
1114 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1117 if (new_mtu < IBMVETH_MAX_MTU)
1120 for (i = 0; i < IbmVethNumBufferPools; i++)
1121 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1124 if (i == IbmVethNumBufferPools)
1127 /* Deactivate all the buffer pools so that the next loop can activate
1128 only the buffer pools necessary to hold the new MTU */
1129 for (i = 0; i < IbmVethNumBufferPools; i++)
1130 if (adapter->rx_buff_pool[i].active) {
1131 ibmveth_free_buffer_pool(adapter,
1132 &adapter->rx_buff_pool[i]);
1133 adapter->rx_buff_pool[i].active = 0;
1136 /* Look for an active buffer pool that can hold the new MTU */
1137 for(i = 0; i<IbmVethNumBufferPools; i++) {
1138 adapter->rx_buff_pool[i].active = 1;
1140 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1141 if (netif_running(adapter->netdev)) {
1142 adapter->pool_config = 1;
1143 ibmveth_close(adapter->netdev);
1144 adapter->pool_config = 0;
1146 vio_cmo_set_dev_desired(viodev,
1147 ibmveth_get_desired_dma
1149 return ibmveth_open(adapter->netdev);
1152 vio_cmo_set_dev_desired(viodev,
1153 ibmveth_get_desired_dma
1161 #ifdef CONFIG_NET_POLL_CONTROLLER
1162 static void ibmveth_poll_controller(struct net_device *dev)
1164 ibmveth_replenish_task(netdev_priv(dev));
1165 ibmveth_interrupt(dev->irq, dev);
1170 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1172 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1175 * Number of bytes of IO data the driver will need to perform well.
1177 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1179 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1180 struct ibmveth_adapter *adapter;
1185 /* netdev inits at probe time along with the structures we need below*/
1187 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1189 adapter = netdev_priv(netdev);
1191 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1192 ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1194 for (i = 0; i < IbmVethNumBufferPools; i++) {
1195 /* add the size of the active receive buffers */
1196 if (adapter->rx_buff_pool[i].active)
1198 adapter->rx_buff_pool[i].size *
1199 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1201 rxqentries += adapter->rx_buff_pool[i].size;
1203 /* add the size of the receive queue entries */
1204 ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1209 static const struct net_device_ops ibmveth_netdev_ops = {
1210 .ndo_open = ibmveth_open,
1211 .ndo_stop = ibmveth_close,
1212 .ndo_start_xmit = ibmveth_start_xmit,
1213 .ndo_set_multicast_list = ibmveth_set_multicast_list,
1214 .ndo_do_ioctl = ibmveth_ioctl,
1215 .ndo_change_mtu = ibmveth_change_mtu,
1216 .ndo_validate_addr = eth_validate_addr,
1217 .ndo_set_mac_address = eth_mac_addr,
1218 #ifdef CONFIG_NET_POLL_CONTROLLER
1219 .ndo_poll_controller = ibmveth_poll_controller,
1223 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1227 struct net_device *netdev;
1228 struct ibmveth_adapter *adapter;
1229 unsigned long set_attr, ret_attr;
1231 unsigned char *mac_addr_p;
1232 unsigned int *mcastFilterSize_p;
1235 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
1238 mac_addr_p = (unsigned char *) vio_get_attribute(dev,
1239 VETH_MAC_ADDR, NULL);
1241 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
1242 "attribute\n", __FILE__, __LINE__);
1246 mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
1247 VETH_MCAST_FILTER_SIZE, NULL);
1248 if(!mcastFilterSize_p) {
1249 printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
1250 "VETH_MCAST_FILTER_SIZE attribute\n",
1251 __FILE__, __LINE__);
1255 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1260 adapter = netdev_priv(netdev);
1261 dev_set_drvdata(&dev->dev, netdev);
1263 adapter->vdev = dev;
1264 adapter->netdev = netdev;
1265 adapter->mcastFilterSize= *mcastFilterSize_p;
1266 adapter->pool_config = 0;
1268 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1270 /* Some older boxes running PHYP non-natively have an OF that
1271 returns a 8-byte local-mac-address field (and the first
1272 2 bytes have to be ignored) while newer boxes' OF return
1273 a 6-byte field. Note that IEEE 1275 specifies that
1274 local-mac-address must be a 6-byte field.
1275 The RPA doc specifies that the first byte must be 10b, so
1276 we'll just look for it to solve this 8 vs. 6 byte field issue */
1278 if ((*mac_addr_p & 0x3) != 0x02)
1281 adapter->mac_addr = 0;
1282 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1284 netdev->irq = dev->irq;
1285 netdev->netdev_ops = &ibmveth_netdev_ops;
1286 netdev->ethtool_ops = &netdev_ethtool_ops;
1287 SET_NETDEV_DEV(netdev, &dev->dev);
1288 netdev->features |= NETIF_F_LLTX;
1289 spin_lock_init(&adapter->stats_lock);
1291 memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1293 for(i = 0; i<IbmVethNumBufferPools; i++) {
1294 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1297 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1298 pool_count[i], pool_size[i],
1300 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1301 &dev->dev.kobj, "pool%d", i);
1303 kobject_uevent(kobj, KOBJ_ADD);
1306 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
1308 adapter->buffer_list_dma = DMA_ERROR_CODE;
1309 adapter->filter_list_dma = DMA_ERROR_CODE;
1310 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1312 ibmveth_debug_printk("registering netdev...\n");
1314 ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
1316 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
1317 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
1318 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
1319 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
1321 ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
1323 if (ret == H_SUCCESS) {
1324 adapter->rx_csum = 1;
1325 netdev->features |= NETIF_F_IP_CSUM;
1327 ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
1330 rc = register_netdev(netdev);
1333 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
1334 free_netdev(netdev);
1338 ibmveth_debug_printk("registered\n");
1340 ibmveth_proc_register_adapter(adapter);
1345 static int __devexit ibmveth_remove(struct vio_dev *dev)
1347 struct net_device *netdev = dev_get_drvdata(&dev->dev);
1348 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1351 for(i = 0; i<IbmVethNumBufferPools; i++)
1352 kobject_put(&adapter->rx_buff_pool[i].kobj);
1354 unregister_netdev(netdev);
1356 ibmveth_proc_unregister_adapter(adapter);
1358 free_netdev(netdev);
1359 dev_set_drvdata(&dev->dev, NULL);
1364 #ifdef CONFIG_PROC_FS
1365 static void ibmveth_proc_register_driver(void)
1367 ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
1368 if (ibmveth_proc_dir) {
1372 static void ibmveth_proc_unregister_driver(void)
1374 remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
1377 static int ibmveth_show(struct seq_file *seq, void *v)
1379 struct ibmveth_adapter *adapter = seq->private;
1380 char *current_mac = (char *) adapter->netdev->dev_addr;
1381 char *firmware_mac = (char *) &adapter->mac_addr;
1383 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1385 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1386 seq_printf(seq, "Current MAC: %pM\n", current_mac);
1387 seq_printf(seq, "Firmware MAC: %pM\n", firmware_mac);
1389 seq_printf(seq, "\nAdapter Statistics:\n");
1390 seq_printf(seq, " TX: vio_map_single failres: %lld\n", adapter->tx_map_failed);
1391 seq_printf(seq, " send failures: %lld\n", adapter->tx_send_failed);
1392 seq_printf(seq, " RX: replenish task cycles: %lld\n", adapter->replenish_task_cycles);
1393 seq_printf(seq, " alloc_skb_failures: %lld\n", adapter->replenish_no_mem);
1394 seq_printf(seq, " add buffer failures: %lld\n", adapter->replenish_add_buff_failure);
1395 seq_printf(seq, " invalid buffers: %lld\n", adapter->rx_invalid_buffer);
1396 seq_printf(seq, " no buffers: %lld\n", adapter->rx_no_buffer);
1401 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1403 return single_open(file, ibmveth_show, PDE(inode)->data);
1406 static const struct file_operations ibmveth_proc_fops = {
1407 .owner = THIS_MODULE,
1408 .open = ibmveth_proc_open,
1410 .llseek = seq_lseek,
1411 .release = single_release,
1414 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1416 struct proc_dir_entry *entry;
1417 if (ibmveth_proc_dir) {
1419 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1420 entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir,
1421 &ibmveth_proc_fops, adapter);
1423 ibmveth_error_printk("Cannot create adapter proc entry");
1427 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1429 if (ibmveth_proc_dir) {
1431 sprintf(u_addr, "%x", adapter->vdev->unit_address);
1432 remove_proc_entry(u_addr, ibmveth_proc_dir);
1436 #else /* CONFIG_PROC_FS */
1437 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1441 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1444 static void ibmveth_proc_register_driver(void)
1448 static void ibmveth_proc_unregister_driver(void)
1451 #endif /* CONFIG_PROC_FS */
1453 static struct attribute veth_active_attr;
1454 static struct attribute veth_num_attr;
1455 static struct attribute veth_size_attr;
1457 static ssize_t veth_pool_show(struct kobject * kobj,
1458 struct attribute * attr, char * buf)
1460 struct ibmveth_buff_pool *pool = container_of(kobj,
1461 struct ibmveth_buff_pool,
1464 if (attr == &veth_active_attr)
1465 return sprintf(buf, "%d\n", pool->active);
1466 else if (attr == &veth_num_attr)
1467 return sprintf(buf, "%d\n", pool->size);
1468 else if (attr == &veth_size_attr)
1469 return sprintf(buf, "%d\n", pool->buff_size);
1473 static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
1474 const char * buf, size_t count)
1476 struct ibmveth_buff_pool *pool = container_of(kobj,
1477 struct ibmveth_buff_pool,
1479 struct net_device *netdev = dev_get_drvdata(
1480 container_of(kobj->parent, struct device, kobj));
1481 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1482 long value = simple_strtol(buf, NULL, 10);
1485 if (attr == &veth_active_attr) {
1486 if (value && !pool->active) {
1487 if (netif_running(netdev)) {
1488 if(ibmveth_alloc_buffer_pool(pool)) {
1489 ibmveth_error_printk("unable to alloc pool\n");
1493 adapter->pool_config = 1;
1494 ibmveth_close(netdev);
1495 adapter->pool_config = 0;
1496 if ((rc = ibmveth_open(netdev)))
1500 } else if (!value && pool->active) {
1501 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1503 /* Make sure there is a buffer pool with buffers that
1504 can hold a packet of the size of the MTU */
1505 for (i = 0; i < IbmVethNumBufferPools; i++) {
1506 if (pool == &adapter->rx_buff_pool[i])
1508 if (!adapter->rx_buff_pool[i].active)
1510 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1514 if (i == IbmVethNumBufferPools) {
1515 ibmveth_error_printk("no active pool >= MTU\n");
1519 if (netif_running(netdev)) {
1520 adapter->pool_config = 1;
1521 ibmveth_close(netdev);
1523 adapter->pool_config = 0;
1524 if ((rc = ibmveth_open(netdev)))
1529 } else if (attr == &veth_num_attr) {
1530 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
1533 if (netif_running(netdev)) {
1534 adapter->pool_config = 1;
1535 ibmveth_close(netdev);
1536 adapter->pool_config = 0;
1538 if ((rc = ibmveth_open(netdev)))
1543 } else if (attr == &veth_size_attr) {
1544 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
1547 if (netif_running(netdev)) {
1548 adapter->pool_config = 1;
1549 ibmveth_close(netdev);
1550 adapter->pool_config = 0;
1551 pool->buff_size = value;
1552 if ((rc = ibmveth_open(netdev)))
1555 pool->buff_size = value;
1559 /* kick the interrupt handler to allocate/deallocate pools */
1560 ibmveth_interrupt(netdev->irq, netdev);
1565 #define ATTR(_name, _mode) \
1566 struct attribute veth_##_name##_attr = { \
1567 .name = __stringify(_name), .mode = _mode, \
1570 static ATTR(active, 0644);
1571 static ATTR(num, 0644);
1572 static ATTR(size, 0644);
1574 static struct attribute * veth_pool_attrs[] = {
1581 static const struct sysfs_ops veth_pool_ops = {
1582 .show = veth_pool_show,
1583 .store = veth_pool_store,
1586 static struct kobj_type ktype_veth_pool = {
1588 .sysfs_ops = &veth_pool_ops,
1589 .default_attrs = veth_pool_attrs,
1592 static int ibmveth_resume(struct device *dev)
1594 struct net_device *netdev = dev_get_drvdata(dev);
1595 ibmveth_interrupt(netdev->irq, netdev);
1599 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1600 { "network", "IBM,l-lan"},
1603 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1605 static struct dev_pm_ops ibmveth_pm_ops = {
1606 .resume = ibmveth_resume
1609 static struct vio_driver ibmveth_driver = {
1610 .id_table = ibmveth_device_table,
1611 .probe = ibmveth_probe,
1612 .remove = ibmveth_remove,
1613 .get_desired_dma = ibmveth_get_desired_dma,
1615 .name = ibmveth_driver_name,
1616 .owner = THIS_MODULE,
1617 .pm = &ibmveth_pm_ops,
1621 static int __init ibmveth_module_init(void)
1623 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1625 ibmveth_proc_register_driver();
1627 return vio_register_driver(&ibmveth_driver);
1630 static void __exit ibmveth_module_exit(void)
1632 vio_unregister_driver(&ibmveth_driver);
1633 ibmveth_proc_unregister_driver();
1636 module_init(ibmveth_module_init);
1637 module_exit(ibmveth_module_exit);