1 /**************************************************************************/
3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver */
4 /* Copyright (C) 2003 IBM Corp. */
5 /* Dave Larson (larson1@us.ibm.com) */
6 /* 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/config.h>
37 #include <linux/module.h>
38 #include <linux/version.h>
39 #include <linux/types.h>
40 #include <linux/errno.h>
41 #include <linux/ioport.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/kernel.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
46 #include <linux/skbuff.h>
47 #include <linux/init.h>
48 #include <linux/delay.h>
50 #include <linux/ethtool.h>
51 #include <linux/proc_fs.h>
52 #include <asm/semaphore.h>
53 #include <asm/hvcall.h>
54 #include <asm/atomic.h>
55 #include <asm/iommu.h>
57 #include <asm/uaccess.h>
58 #include <linux/proc_fs.h>
59 #include <linux/seq_file.h>
65 #define ibmveth_printk(fmt, args...) \
66 printk(KERN_INFO "%s: " fmt, __FILE__, ## args)
68 #define ibmveth_error_printk(fmt, args...) \
69 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
72 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
73 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
74 #define ibmveth_debug_printk(fmt, args...) \
75 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
76 #define ibmveth_assert(expr) \
78 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
82 #define ibmveth_debug_printk_no_adapter(fmt, args...)
83 #define ibmveth_debug_printk(fmt, args...)
84 #define ibmveth_assert(expr)
87 static int ibmveth_open(struct net_device *dev);
88 static int ibmveth_close(struct net_device *dev);
89 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
90 static int ibmveth_poll(struct net_device *dev, int *budget);
91 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
92 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev);
93 static void ibmveth_set_multicast_list(struct net_device *dev);
94 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
95 static void ibmveth_proc_register_driver(void);
96 static void ibmveth_proc_unregister_driver(void);
97 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
98 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
99 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
101 #ifdef CONFIG_PROC_FS
102 #define IBMVETH_PROC_DIR "ibmveth"
103 static struct proc_dir_entry *ibmveth_proc_dir;
106 static const char ibmveth_driver_name[] = "ibmveth";
107 static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
108 static const char ibmveth_driver_version[] = "1.0";
110 MODULE_AUTHOR("Dave Larson <larson1@us.ibm.com>");
111 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
112 MODULE_LICENSE("GPL");
114 /* simple methods of getting data from the current rxq entry */
115 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
117 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
120 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
122 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
125 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
127 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
130 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
132 return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
135 /* setup the initial settings for a buffer pool */
136 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size)
138 pool->size = pool_size;
139 pool->index = pool_index;
140 pool->buff_size = buff_size;
141 pool->threshold = pool_size / 2;
144 /* allocate and setup an buffer pool - called during open */
145 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
149 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
151 if(!pool->free_map) {
155 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
156 if(!pool->dma_addr) {
157 kfree(pool->free_map);
158 pool->free_map = NULL;
162 pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL);
165 kfree(pool->dma_addr);
166 pool->dma_addr = NULL;
168 kfree(pool->free_map);
169 pool->free_map = NULL;
173 memset(pool->skbuff, 0, sizeof(void*) * pool->size);
174 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
176 for(i = 0; i < pool->size; ++i) {
177 pool->free_map[i] = i;
180 atomic_set(&pool->available, 0);
181 pool->producer_index = 0;
182 pool->consumer_index = 0;
187 /* replenish the buffers for a pool. note that we don't need to
188 * skb_reserve these since they are used for incoming...
190 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
193 u32 count = pool->size - atomic_read(&pool->available);
194 u32 buffers_added = 0;
198 for(i = 0; i < count; ++i) {
200 unsigned int free_index, index;
202 union ibmveth_buf_desc desc;
203 unsigned long lpar_rc;
206 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
209 ibmveth_debug_printk("replenish: unable to allocate skb\n");
210 adapter->replenish_no_mem++;
214 free_index = pool->consumer_index++ % pool->size;
215 index = pool->free_map[free_index];
217 ibmveth_assert(index != 0xffff);
218 ibmveth_assert(pool->skbuff[index] == NULL);
220 dma_addr = vio_map_single(adapter->vdev, skb->data, pool->buff_size, DMA_FROM_DEVICE);
222 pool->dma_addr[index] = dma_addr;
223 pool->skbuff[index] = skb;
225 correlator = ((u64)pool->index << 32) | index;
226 *(u64*)skb->data = correlator;
229 desc.fields.valid = 1;
230 desc.fields.length = pool->buff_size;
231 desc.fields.address = dma_addr;
233 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
235 if(lpar_rc != H_Success) {
236 pool->skbuff[index] = NULL;
237 pool->consumer_index--;
238 vio_unmap_single(adapter->vdev, pool->dma_addr[index], pool->buff_size, DMA_FROM_DEVICE);
239 dev_kfree_skb_any(skb);
240 adapter->replenish_add_buff_failure++;
243 pool->free_map[free_index] = 0xffff;
245 adapter->replenish_add_buff_success++;
250 atomic_add(buffers_added, &(pool->available));
253 /* check if replenishing is needed. */
254 static inline int ibmveth_is_replenishing_needed(struct ibmveth_adapter *adapter)
256 return ((atomic_read(&adapter->rx_buff_pool[0].available) < adapter->rx_buff_pool[0].threshold) ||
257 (atomic_read(&adapter->rx_buff_pool[1].available) < adapter->rx_buff_pool[1].threshold) ||
258 (atomic_read(&adapter->rx_buff_pool[2].available) < adapter->rx_buff_pool[2].threshold));
261 /* replenish tasklet routine */
262 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
264 adapter->replenish_task_cycles++;
266 ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
267 ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
268 ibmveth_replenish_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
270 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
272 atomic_inc(&adapter->not_replenishing);
273 ibmveth_assert(atomic_read(&adapter->not_replenishing) == 1);
276 /* kick the replenish tasklet if we need replenishing and it isn't already running */
277 static inline void ibmveth_schedule_replenishing(struct ibmveth_adapter *adapter)
279 if(ibmveth_is_replenishing_needed(adapter) &&
280 (atomic_dec_if_positive(&adapter->not_replenishing) == 0)) {
281 schedule_work(&adapter->replenish_task);
285 /* empty and free ana buffer pool - also used to do cleanup in error paths */
286 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
291 kfree(pool->free_map);
292 pool->free_map = NULL;
295 if(pool->skbuff && pool->dma_addr) {
296 for(i = 0; i < pool->size; ++i) {
297 struct sk_buff *skb = pool->skbuff[i];
299 vio_unmap_single(adapter->vdev,
303 dev_kfree_skb_any(skb);
304 pool->skbuff[i] = NULL;
310 kfree(pool->dma_addr);
311 pool->dma_addr = NULL;
320 /* remove a buffer from a pool */
321 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
323 unsigned int pool = correlator >> 32;
324 unsigned int index = correlator & 0xffffffffUL;
325 unsigned int free_index;
328 ibmveth_assert(pool < IbmVethNumBufferPools);
329 ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
331 skb = adapter->rx_buff_pool[pool].skbuff[index];
333 ibmveth_assert(skb != NULL);
335 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
337 vio_unmap_single(adapter->vdev,
338 adapter->rx_buff_pool[pool].dma_addr[index],
339 adapter->rx_buff_pool[pool].buff_size,
342 free_index = adapter->rx_buff_pool[pool].producer_index++ % 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);
377 desc.fields.valid = 1;
378 desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
379 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
381 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
383 if(lpar_rc != H_Success) {
384 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
385 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
388 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
389 adapter->rx_queue.index = 0;
390 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
394 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
396 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
398 if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
399 adapter->rx_queue.index = 0;
400 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
404 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
406 if(adapter->buffer_list_addr != NULL) {
407 if(!dma_mapping_error(adapter->buffer_list_dma)) {
408 vio_unmap_single(adapter->vdev, adapter->buffer_list_dma, 4096, DMA_BIDIRECTIONAL);
409 adapter->buffer_list_dma = DMA_ERROR_CODE;
411 free_page((unsigned long)adapter->buffer_list_addr);
412 adapter->buffer_list_addr = NULL;
415 if(adapter->filter_list_addr != NULL) {
416 if(!dma_mapping_error(adapter->filter_list_dma)) {
417 vio_unmap_single(adapter->vdev, adapter->filter_list_dma, 4096, DMA_BIDIRECTIONAL);
418 adapter->filter_list_dma = DMA_ERROR_CODE;
420 free_page((unsigned long)adapter->filter_list_addr);
421 adapter->filter_list_addr = NULL;
424 if(adapter->rx_queue.queue_addr != NULL) {
425 if(!dma_mapping_error(adapter->rx_queue.queue_dma)) {
426 vio_unmap_single(adapter->vdev, adapter->rx_queue.queue_dma, adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
427 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
429 kfree(adapter->rx_queue.queue_addr);
430 adapter->rx_queue.queue_addr = NULL;
433 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[0]);
434 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[1]);
435 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[2]);
438 static int ibmveth_open(struct net_device *netdev)
440 struct ibmveth_adapter *adapter = netdev->priv;
443 unsigned long lpar_rc;
445 union ibmveth_buf_desc rxq_desc;
447 ibmveth_debug_printk("open starting\n");
450 adapter->rx_buff_pool[0].size +
451 adapter->rx_buff_pool[1].size +
452 adapter->rx_buff_pool[2].size + 1;
454 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
455 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
457 if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
458 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
459 ibmveth_cleanup(adapter);
463 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
464 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
466 if(!adapter->rx_queue.queue_addr) {
467 ibmveth_error_printk("unable to allocate rx queue pages\n");
468 ibmveth_cleanup(adapter);
472 adapter->buffer_list_dma = vio_map_single(adapter->vdev, adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
473 adapter->filter_list_dma = vio_map_single(adapter->vdev, adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
474 adapter->rx_queue.queue_dma = vio_map_single(adapter->vdev, adapter->rx_queue.queue_addr, adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
476 if((dma_mapping_error(adapter->buffer_list_dma) ) ||
477 (dma_mapping_error(adapter->filter_list_dma)) ||
478 (dma_mapping_error(adapter->rx_queue.queue_dma))) {
479 ibmveth_error_printk("unable to map filter or buffer list pages\n");
480 ibmveth_cleanup(adapter);
484 adapter->rx_queue.index = 0;
485 adapter->rx_queue.num_slots = rxq_entries;
486 adapter->rx_queue.toggle = 1;
488 if(ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[0]) ||
489 ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[1]) ||
490 ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[2]))
492 ibmveth_error_printk("unable to allocate buffer pools\n");
493 ibmveth_cleanup(adapter);
497 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
498 mac_address = mac_address >> 16;
501 rxq_desc.fields.valid = 1;
502 rxq_desc.fields.length = adapter->rx_queue.queue_len;
503 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
505 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
506 ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
507 ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
510 lpar_rc = h_register_logical_lan(adapter->vdev->unit_address,
511 adapter->buffer_list_dma,
513 adapter->filter_list_dma,
516 if(lpar_rc != H_Success) {
517 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
518 ibmveth_error_printk("buffer TCE:0x%x filter TCE:0x%x rxq desc:0x%lx MAC:0x%lx\n",
519 adapter->buffer_list_dma,
520 adapter->filter_list_dma,
523 ibmveth_cleanup(adapter);
527 ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
528 if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
529 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
531 rc = h_free_logical_lan(adapter->vdev->unit_address);
532 } while H_isLongBusy(rc);
534 ibmveth_cleanup(adapter);
538 netif_start_queue(netdev);
540 ibmveth_debug_printk("scheduling initial replenish cycle\n");
541 ibmveth_schedule_replenishing(adapter);
543 ibmveth_debug_printk("open complete\n");
548 static int ibmveth_close(struct net_device *netdev)
550 struct ibmveth_adapter *adapter = netdev->priv;
553 ibmveth_debug_printk("close starting\n");
555 netif_stop_queue(netdev);
557 free_irq(netdev->irq, netdev);
559 cancel_delayed_work(&adapter->replenish_task);
560 flush_scheduled_work();
563 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
564 } while H_isLongBusy(lpar_rc);
566 if(lpar_rc != H_Success)
568 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
572 adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
574 ibmveth_cleanup(adapter);
576 ibmveth_debug_printk("close complete\n");
581 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
582 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
583 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
584 cmd->speed = SPEED_1000;
585 cmd->duplex = DUPLEX_FULL;
586 cmd->port = PORT_FIBRE;
587 cmd->phy_address = 0;
588 cmd->transceiver = XCVR_INTERNAL;
589 cmd->autoneg = AUTONEG_ENABLE;
595 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
596 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
597 strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
600 static u32 netdev_get_link(struct net_device *dev) {
604 static struct ethtool_ops netdev_ethtool_ops = {
605 .get_drvinfo = netdev_get_drvinfo,
606 .get_settings = netdev_get_settings,
607 .get_link = netdev_get_link,
608 .get_sg = ethtool_op_get_sg,
609 .get_tx_csum = ethtool_op_get_tx_csum,
612 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
617 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
619 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
621 struct ibmveth_adapter *adapter = netdev->priv;
622 union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
623 unsigned long lpar_rc;
624 int nfrags = 0, curfrag;
625 unsigned long correlator;
626 unsigned int retry_count;
628 if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
629 adapter->stats.tx_dropped++;
634 memset(&desc, 0, sizeof(desc));
636 /* nfrags = number of frags after the initial fragment */
637 nfrags = skb_shinfo(skb)->nr_frags;
640 adapter->tx_multidesc_send++;
642 /* map the initial fragment */
643 desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len;
644 desc[0].fields.address = vio_map_single(adapter->vdev, skb->data,
645 desc[0].fields.length, DMA_TO_DEVICE);
646 desc[0].fields.valid = 1;
648 if(dma_mapping_error(desc[0].fields.address)) {
649 ibmveth_error_printk("tx: unable to map initial fragment\n");
650 adapter->tx_map_failed++;
651 adapter->stats.tx_dropped++;
658 /* map fragments past the initial portion if there are any */
660 skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
661 desc[curfrag+1].fields.address
662 = vio_map_single(adapter->vdev,
663 page_address(frag->page) + frag->page_offset,
664 frag->size, DMA_TO_DEVICE);
665 desc[curfrag+1].fields.length = frag->size;
666 desc[curfrag+1].fields.valid = 1;
668 if(dma_mapping_error(desc[curfrag+1].fields.address)) {
669 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
670 adapter->tx_map_failed++;
671 adapter->stats.tx_dropped++;
672 /* Free all the mappings we just created */
673 while(curfrag < nfrags) {
674 vio_unmap_single(adapter->vdev,
675 desc[curfrag+1].fields.address,
676 desc[curfrag+1].fields.length,
685 /* send the frame. Arbitrarily set retrycount to 1024 */
689 lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
697 } while ((lpar_rc == H_Busy) && (retry_count--));
699 if(lpar_rc != H_Success && lpar_rc != H_Dropped) {
701 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
702 for(i = 0; i < 6; i++) {
703 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
704 desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
706 adapter->tx_send_failed++;
707 adapter->stats.tx_dropped++;
709 adapter->stats.tx_packets++;
710 adapter->stats.tx_bytes += skb->len;
714 vio_unmap_single(adapter->vdev, desc[nfrags].fields.address, desc[nfrags].fields.length, DMA_TO_DEVICE);
715 } while(--nfrags >= 0);
721 static int ibmveth_poll(struct net_device *netdev, int *budget)
723 struct ibmveth_adapter *adapter = netdev->priv;
724 int max_frames_to_process = netdev->quota;
725 int frames_processed = 0;
727 unsigned long lpar_rc;
731 struct net_device *netdev = adapter->netdev;
733 if(ibmveth_rxq_pending_buffer(adapter)) {
736 if(!ibmveth_rxq_buffer_valid(adapter)) {
737 wmb(); /* suggested by larson1 */
738 adapter->rx_invalid_buffer++;
739 ibmveth_debug_printk("recycling invalid buffer\n");
740 ibmveth_rxq_recycle_buffer(adapter);
742 int length = ibmveth_rxq_frame_length(adapter);
743 int offset = ibmveth_rxq_frame_offset(adapter);
744 skb = ibmveth_rxq_get_buffer(adapter);
746 ibmveth_rxq_harvest_buffer(adapter);
748 skb_reserve(skb, offset);
749 skb_put(skb, length);
751 skb->protocol = eth_type_trans(skb, netdev);
753 netif_receive_skb(skb); /* send it up */
755 adapter->stats.rx_packets++;
756 adapter->stats.rx_bytes += length;
762 } while(more_work && (frames_processed < max_frames_to_process));
764 ibmveth_schedule_replenishing(adapter);
767 /* more work to do - return that we are not done yet */
768 netdev->quota -= frames_processed;
769 *budget -= frames_processed;
773 /* we think we are done - reenable interrupts, then check once more to make sure we are done */
774 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
776 ibmveth_assert(lpar_rc == H_Success);
778 netif_rx_complete(netdev);
780 if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed))
782 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
783 ibmveth_assert(lpar_rc == H_Success);
788 netdev->quota -= frames_processed;
789 *budget -= frames_processed;
791 /* we really are done */
795 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
797 struct net_device *netdev = dev_instance;
798 struct ibmveth_adapter *adapter = netdev->priv;
799 unsigned long lpar_rc;
801 if(netif_rx_schedule_prep(netdev)) {
802 lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
803 ibmveth_assert(lpar_rc == H_Success);
804 __netif_rx_schedule(netdev);
809 static struct net_device_stats *ibmveth_get_stats(struct net_device *dev)
811 struct ibmveth_adapter *adapter = dev->priv;
812 return &adapter->stats;
815 static void ibmveth_set_multicast_list(struct net_device *netdev)
817 struct ibmveth_adapter *adapter = netdev->priv;
818 unsigned long lpar_rc;
820 if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) {
821 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
822 IbmVethMcastEnableRecv |
823 IbmVethMcastDisableFiltering,
825 if(lpar_rc != H_Success) {
826 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
829 struct dev_mc_list *mclist = netdev->mc_list;
831 /* clear the filter table & disable filtering */
832 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
833 IbmVethMcastEnableRecv |
834 IbmVethMcastDisableFiltering |
835 IbmVethMcastClearFilterTable,
837 if(lpar_rc != H_Success) {
838 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
840 /* add the addresses to the filter table */
841 for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) {
842 // add the multicast address to the filter table
843 unsigned long mcast_addr = 0;
844 memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6);
845 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
846 IbmVethMcastAddFilter,
848 if(lpar_rc != H_Success) {
849 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
853 /* re-enable filtering */
854 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
855 IbmVethMcastEnableFiltering,
857 if(lpar_rc != H_Success) {
858 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
863 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
865 if ((new_mtu < 68) || (new_mtu > (1<<20)))
871 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
874 struct net_device *netdev;
875 struct ibmveth_adapter *adapter;
877 unsigned int *mac_addr_p;
878 unsigned int *mcastFilterSize_p;
881 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
884 mac_addr_p = (unsigned int *) vio_get_attribute(dev, VETH_MAC_ADDR, 0);
886 ibmveth_error_printk("Can't find VETH_MAC_ADDR attribute\n");
890 mcastFilterSize_p= (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, 0);
891 if(!mcastFilterSize_p) {
892 ibmveth_error_printk("Can't find VETH_MCAST_FILTER_SIZE attribute\n");
896 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
901 SET_MODULE_OWNER(netdev);
903 adapter = netdev->priv;
904 memset(adapter, 0, sizeof(adapter));
905 dev->driver_data = netdev;
908 adapter->netdev = netdev;
909 adapter->mcastFilterSize= *mcastFilterSize_p;
911 /* Some older boxes running PHYP non-natively have an OF that
912 returns a 8-byte local-mac-address field (and the first
913 2 bytes have to be ignored) while newer boxes' OF return
914 a 6-byte field. Note that IEEE 1275 specifies that
915 local-mac-address must be a 6-byte field.
916 The RPA doc specifies that the first byte must be 10b, so
917 we'll just look for it to solve this 8 vs. 6 byte field issue */
919 while (*((char*)mac_addr_p) != (char)(0x02))
920 ((char*)mac_addr_p)++;
922 adapter->mac_addr = 0;
923 memcpy(&adapter->mac_addr, mac_addr_p, 6);
925 adapter->liobn = dev->iommu_table->it_index;
927 netdev->irq = dev->irq;
928 netdev->open = ibmveth_open;
929 netdev->poll = ibmveth_poll;
931 netdev->stop = ibmveth_close;
932 netdev->hard_start_xmit = ibmveth_start_xmit;
933 netdev->get_stats = ibmveth_get_stats;
934 netdev->set_multicast_list = ibmveth_set_multicast_list;
935 netdev->do_ioctl = ibmveth_ioctl;
936 netdev->ethtool_ops = &netdev_ethtool_ops;
937 netdev->change_mtu = ibmveth_change_mtu;
939 memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
941 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[0], 0, IbmVethPool0DftCnt, IbmVethPool0DftSize);
942 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[1], 1, IbmVethPool1DftCnt, IbmVethPool1DftSize);
943 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[2], 2, IbmVethPool2DftCnt, IbmVethPool2DftSize);
945 ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
947 INIT_WORK(&adapter->replenish_task, (void*)ibmveth_replenish_task, (void*)adapter);
949 adapter->buffer_list_dma = DMA_ERROR_CODE;
950 adapter->filter_list_dma = DMA_ERROR_CODE;
951 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
953 atomic_set(&adapter->not_replenishing, 1);
955 ibmveth_debug_printk("registering netdev...\n");
957 rc = register_netdev(netdev);
960 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
965 ibmveth_debug_printk("registered\n");
967 ibmveth_proc_register_adapter(adapter);
972 static int __devexit ibmveth_remove(struct vio_dev *dev)
974 struct net_device *netdev = dev->driver_data;
975 struct ibmveth_adapter *adapter = netdev->priv;
977 unregister_netdev(netdev);
979 ibmveth_proc_unregister_adapter(adapter);
985 #ifdef CONFIG_PROC_FS
986 static void ibmveth_proc_register_driver(void)
988 ibmveth_proc_dir = create_proc_entry(IBMVETH_PROC_DIR, S_IFDIR, proc_net);
989 if (ibmveth_proc_dir) {
990 SET_MODULE_OWNER(ibmveth_proc_dir);
994 static void ibmveth_proc_unregister_driver(void)
996 remove_proc_entry(IBMVETH_PROC_DIR, proc_net);
999 static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos)
1008 static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1014 static void ibmveth_seq_stop(struct seq_file *seq, void *v)
1018 static int ibmveth_seq_show(struct seq_file *seq, void *v)
1020 struct ibmveth_adapter *adapter = seq->private;
1021 char *current_mac = ((char*) &adapter->netdev->dev_addr);
1022 char *firmware_mac = ((char*) &adapter->mac_addr) ;
1024 seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
1026 seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
1027 seq_printf(seq, "LIOBN: 0x%lx\n", adapter->liobn);
1028 seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1029 current_mac[0], current_mac[1], current_mac[2],
1030 current_mac[3], current_mac[4], current_mac[5]);
1031 seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1032 firmware_mac[0], firmware_mac[1], firmware_mac[2],
1033 firmware_mac[3], firmware_mac[4], firmware_mac[5]);
1035 seq_printf(seq, "\nAdapter Statistics:\n");
1036 seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized);
1037 seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send);
1038 seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed);
1039 seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed);
1040 seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed);
1041 seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles);
1042 seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem);
1043 seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure);
1044 seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer);
1045 seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer);
1049 static struct seq_operations ibmveth_seq_ops = {
1050 .start = ibmveth_seq_start,
1051 .next = ibmveth_seq_next,
1052 .stop = ibmveth_seq_stop,
1053 .show = ibmveth_seq_show,
1056 static int ibmveth_proc_open(struct inode *inode, struct file *file)
1058 struct seq_file *seq;
1059 struct proc_dir_entry *proc;
1062 rc = seq_open(file, &ibmveth_seq_ops);
1064 /* recover the pointer buried in proc_dir_entry data */
1065 seq = file->private_data;
1067 seq->private = proc->data;
1072 static struct file_operations ibmveth_proc_fops = {
1073 .owner = THIS_MODULE,
1074 .open = ibmveth_proc_open,
1076 .llseek = seq_lseek,
1077 .release = seq_release,
1080 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1082 struct proc_dir_entry *entry;
1083 if (ibmveth_proc_dir) {
1084 entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir);
1086 ibmveth_error_printk("Cannot create adapter proc entry");
1088 entry->data = (void *) adapter;
1089 entry->proc_fops = &ibmveth_proc_fops;
1090 SET_MODULE_OWNER(entry);
1096 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1098 if (ibmveth_proc_dir) {
1099 remove_proc_entry(adapter->netdev->name, ibmveth_proc_dir);
1103 #else /* CONFIG_PROC_FS */
1104 static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
1108 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
1111 static void ibmveth_proc_register_driver(void)
1115 static void ibmveth_proc_unregister_driver(void)
1118 #endif /* CONFIG_PROC_FS */
1120 static struct vio_device_id ibmveth_device_table[] __devinitdata= {
1121 { "network", "IBM,l-lan"},
1125 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1127 static struct vio_driver ibmveth_driver = {
1128 .name = (char *)ibmveth_driver_name,
1129 .id_table = ibmveth_device_table,
1130 .probe = ibmveth_probe,
1131 .remove = ibmveth_remove
1134 static int __init ibmveth_module_init(void)
1136 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
1138 ibmveth_proc_register_driver();
1140 return vio_register_driver(&ibmveth_driver);
1143 static void __exit ibmveth_module_exit(void)
1145 vio_unregister_driver(&ibmveth_driver);
1146 ibmveth_proc_unregister_driver();
1149 module_init(ibmveth_module_init);
1150 module_exit(ibmveth_module_exit);