2 * IBM Power Virtual Ethernet Device Driver
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * Copyright (C) IBM Corporation, 2003, 2010
20 * Authors: Dave Larson <larson1@us.ibm.com>
21 * Santiago Leon <santil@linux.vnet.ibm.com>
22 * Brian King <brking@linux.vnet.ibm.com>
23 * Robert Jennings <rcj@linux.vnet.ibm.com>
24 * Anton Blanchard <anton@au.ibm.com>
27 #include <linux/module.h>
28 #include <linux/moduleparam.h>
29 #include <linux/types.h>
30 #include <linux/errno.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/kernel.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/init.h>
37 #include <linux/interrupt.h>
40 #include <linux/ethtool.h>
43 #include <linux/ipv6.h>
44 #include <linux/slab.h>
45 #include <asm/hvcall.h>
46 #include <linux/atomic.h>
48 #include <asm/iommu.h>
49 #include <asm/firmware.h>
53 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
54 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
55 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
57 static struct kobj_type ktype_veth_pool;
60 static const char ibmveth_driver_name[] = "ibmveth";
61 static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
62 #define ibmveth_driver_version "1.04"
64 MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>");
65 MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
66 MODULE_LICENSE("GPL");
67 MODULE_VERSION(ibmveth_driver_version);
69 static unsigned int tx_copybreak __read_mostly = 128;
70 module_param(tx_copybreak, uint, 0644);
71 MODULE_PARM_DESC(tx_copybreak,
72 "Maximum size of packet that is copied to a new buffer on transmit");
74 static unsigned int rx_copybreak __read_mostly = 128;
75 module_param(rx_copybreak, uint, 0644);
76 MODULE_PARM_DESC(rx_copybreak,
77 "Maximum size of packet that is copied to a new buffer on receive");
79 static unsigned int rx_flush __read_mostly = 0;
80 module_param(rx_flush, uint, 0644);
81 MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
84 char name[ETH_GSTRING_LEN];
88 #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
89 #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
91 struct ibmveth_stat ibmveth_stats[] = {
92 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
93 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
94 { "replenish_add_buff_failure",
95 IBMVETH_STAT_OFF(replenish_add_buff_failure) },
96 { "replenish_add_buff_success",
97 IBMVETH_STAT_OFF(replenish_add_buff_success) },
98 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
99 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
100 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
101 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
102 { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
103 { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
106 /* simple methods of getting data from the current rxq entry */
107 static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
109 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
112 static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
114 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >>
115 IBMVETH_RXQ_TOGGLE_SHIFT;
118 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
120 return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle;
123 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
125 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID;
128 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
130 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK;
133 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
135 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].length;
138 static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
140 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD;
143 /* setup the initial settings for a buffer pool */
144 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool,
145 u32 pool_index, u32 pool_size,
146 u32 buff_size, u32 pool_active)
148 pool->size = pool_size;
149 pool->index = pool_index;
150 pool->buff_size = buff_size;
151 pool->threshold = pool_size * 7 / 8;
152 pool->active = pool_active;
155 /* allocate and setup an buffer pool - called during open */
156 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
160 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
165 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
166 if (!pool->dma_addr) {
167 kfree(pool->free_map);
168 pool->free_map = NULL;
172 pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
175 kfree(pool->dma_addr);
176 pool->dma_addr = NULL;
178 kfree(pool->free_map);
179 pool->free_map = NULL;
183 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
185 for (i = 0; i < pool->size; ++i)
186 pool->free_map[i] = i;
188 atomic_set(&pool->available, 0);
189 pool->producer_index = 0;
190 pool->consumer_index = 0;
195 static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
197 unsigned long offset;
199 for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
200 asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
203 /* replenish the buffers for a pool. note that we don't need to
204 * skb_reserve these since they are used for incoming...
206 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
207 struct ibmveth_buff_pool *pool)
210 u32 count = pool->size - atomic_read(&pool->available);
211 u32 buffers_added = 0;
213 unsigned int free_index, index;
215 unsigned long lpar_rc;
220 for (i = 0; i < count; ++i) {
221 union ibmveth_buf_desc desc;
223 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
226 netdev_dbg(adapter->netdev,
227 "replenish: unable to allocate skb\n");
228 adapter->replenish_no_mem++;
232 free_index = pool->consumer_index;
233 pool->consumer_index++;
234 if (pool->consumer_index >= pool->size)
235 pool->consumer_index = 0;
236 index = pool->free_map[free_index];
238 BUG_ON(index == IBM_VETH_INVALID_MAP);
239 BUG_ON(pool->skbuff[index] != NULL);
241 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
242 pool->buff_size, DMA_FROM_DEVICE);
244 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
247 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
248 pool->dma_addr[index] = dma_addr;
249 pool->skbuff[index] = skb;
251 correlator = ((u64)pool->index << 32) | index;
252 *(u64 *)skb->data = correlator;
254 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
255 desc.fields.address = dma_addr;
258 unsigned int len = min(pool->buff_size,
259 adapter->netdev->mtu +
261 ibmveth_flush_buffer(skb->data, len);
263 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address,
266 if (lpar_rc != H_SUCCESS) {
270 adapter->replenish_add_buff_success++;
275 atomic_add(buffers_added, &(pool->available));
279 pool->free_map[free_index] = index;
280 pool->skbuff[index] = NULL;
281 if (pool->consumer_index == 0)
282 pool->consumer_index = pool->size - 1;
284 pool->consumer_index--;
285 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
286 dma_unmap_single(&adapter->vdev->dev,
287 pool->dma_addr[index], pool->buff_size,
289 dev_kfree_skb_any(skb);
290 adapter->replenish_add_buff_failure++;
293 atomic_add(buffers_added, &(pool->available));
296 /* replenish routine */
297 static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
301 adapter->replenish_task_cycles++;
303 for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) {
304 struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
307 (atomic_read(&pool->available) < pool->threshold))
308 ibmveth_replenish_buffer_pool(adapter, pool);
311 adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) +
315 /* empty and free ana buffer pool - also used to do cleanup in error paths */
316 static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter,
317 struct ibmveth_buff_pool *pool)
321 kfree(pool->free_map);
322 pool->free_map = NULL;
324 if (pool->skbuff && pool->dma_addr) {
325 for (i = 0; i < pool->size; ++i) {
326 struct sk_buff *skb = pool->skbuff[i];
328 dma_unmap_single(&adapter->vdev->dev,
332 dev_kfree_skb_any(skb);
333 pool->skbuff[i] = NULL;
338 if (pool->dma_addr) {
339 kfree(pool->dma_addr);
340 pool->dma_addr = NULL;
349 /* remove a buffer from a pool */
350 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
353 unsigned int pool = correlator >> 32;
354 unsigned int index = correlator & 0xffffffffUL;
355 unsigned int free_index;
358 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
359 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
361 skb = adapter->rx_buff_pool[pool].skbuff[index];
365 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
367 dma_unmap_single(&adapter->vdev->dev,
368 adapter->rx_buff_pool[pool].dma_addr[index],
369 adapter->rx_buff_pool[pool].buff_size,
372 free_index = adapter->rx_buff_pool[pool].producer_index;
373 adapter->rx_buff_pool[pool].producer_index++;
374 if (adapter->rx_buff_pool[pool].producer_index >=
375 adapter->rx_buff_pool[pool].size)
376 adapter->rx_buff_pool[pool].producer_index = 0;
377 adapter->rx_buff_pool[pool].free_map[free_index] = index;
381 atomic_dec(&(adapter->rx_buff_pool[pool].available));
384 /* get the current buffer on the rx queue */
385 static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
387 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
388 unsigned int pool = correlator >> 32;
389 unsigned int index = correlator & 0xffffffffUL;
391 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
392 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
394 return adapter->rx_buff_pool[pool].skbuff[index];
397 /* recycle the current buffer on the rx queue */
398 static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
400 u32 q_index = adapter->rx_queue.index;
401 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
402 unsigned int pool = correlator >> 32;
403 unsigned int index = correlator & 0xffffffffUL;
404 union ibmveth_buf_desc desc;
405 unsigned long lpar_rc;
408 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
409 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
411 if (!adapter->rx_buff_pool[pool].active) {
412 ibmveth_rxq_harvest_buffer(adapter);
413 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
417 desc.fields.flags_len = IBMVETH_BUF_VALID |
418 adapter->rx_buff_pool[pool].buff_size;
419 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
421 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
423 if (lpar_rc != H_SUCCESS) {
424 netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed "
425 "during recycle rc=%ld", lpar_rc);
426 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
430 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
431 adapter->rx_queue.index = 0;
432 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
439 static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
441 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
443 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
444 adapter->rx_queue.index = 0;
445 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
449 static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
452 struct device *dev = &adapter->vdev->dev;
454 if (adapter->buffer_list_addr != NULL) {
455 if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
456 dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
458 adapter->buffer_list_dma = DMA_ERROR_CODE;
460 free_page((unsigned long)adapter->buffer_list_addr);
461 adapter->buffer_list_addr = NULL;
464 if (adapter->filter_list_addr != NULL) {
465 if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
466 dma_unmap_single(dev, adapter->filter_list_dma, 4096,
468 adapter->filter_list_dma = DMA_ERROR_CODE;
470 free_page((unsigned long)adapter->filter_list_addr);
471 adapter->filter_list_addr = NULL;
474 if (adapter->rx_queue.queue_addr != NULL) {
475 dma_free_coherent(dev, adapter->rx_queue.queue_len,
476 adapter->rx_queue.queue_addr,
477 adapter->rx_queue.queue_dma);
478 adapter->rx_queue.queue_addr = NULL;
481 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
482 if (adapter->rx_buff_pool[i].active)
483 ibmveth_free_buffer_pool(adapter,
484 &adapter->rx_buff_pool[i]);
486 if (adapter->bounce_buffer != NULL) {
487 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
488 dma_unmap_single(&adapter->vdev->dev,
489 adapter->bounce_buffer_dma,
490 adapter->netdev->mtu + IBMVETH_BUFF_OH,
492 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
494 kfree(adapter->bounce_buffer);
495 adapter->bounce_buffer = NULL;
499 static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
500 union ibmveth_buf_desc rxq_desc, u64 mac_address)
502 int rc, try_again = 1;
505 * After a kexec the adapter will still be open, so our attempt to
506 * open it will fail. So if we get a failure we free the adapter and
507 * try again, but only once.
510 rc = h_register_logical_lan(adapter->vdev->unit_address,
511 adapter->buffer_list_dma, rxq_desc.desc,
512 adapter->filter_list_dma, mac_address);
514 if (rc != H_SUCCESS && try_again) {
516 rc = h_free_logical_lan(adapter->vdev->unit_address);
517 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
526 static int ibmveth_open(struct net_device *netdev)
528 struct ibmveth_adapter *adapter = netdev_priv(netdev);
531 unsigned long lpar_rc;
533 union ibmveth_buf_desc rxq_desc;
537 netdev_dbg(netdev, "open starting\n");
539 napi_enable(&adapter->napi);
541 for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
542 rxq_entries += adapter->rx_buff_pool[i].size;
544 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
545 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
547 if (!adapter->buffer_list_addr || !adapter->filter_list_addr) {
548 netdev_err(netdev, "unable to allocate filter or buffer list "
554 dev = &adapter->vdev->dev;
556 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) *
558 adapter->rx_queue.queue_addr =
559 dma_alloc_coherent(dev, adapter->rx_queue.queue_len,
560 &adapter->rx_queue.queue_dma, GFP_KERNEL);
561 if (!adapter->rx_queue.queue_addr) {
566 adapter->buffer_list_dma = dma_map_single(dev,
567 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
568 adapter->filter_list_dma = dma_map_single(dev,
569 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
571 if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
572 (dma_mapping_error(dev, adapter->filter_list_dma))) {
573 netdev_err(netdev, "unable to map filter or buffer list "
579 adapter->rx_queue.index = 0;
580 adapter->rx_queue.num_slots = rxq_entries;
581 adapter->rx_queue.toggle = 1;
583 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
584 mac_address = mac_address >> 16;
586 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID |
587 adapter->rx_queue.queue_len;
588 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
590 netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr);
591 netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr);
592 netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
594 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
596 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
598 if (lpar_rc != H_SUCCESS) {
599 netdev_err(netdev, "h_register_logical_lan failed with %ld\n",
601 netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq "
602 "desc:0x%llx MAC:0x%llx\n",
603 adapter->buffer_list_dma,
604 adapter->filter_list_dma,
611 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
612 if (!adapter->rx_buff_pool[i].active)
614 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
615 netdev_err(netdev, "unable to alloc pool\n");
616 adapter->rx_buff_pool[i].active = 0;
622 netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq);
623 rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name,
626 netdev_err(netdev, "unable to request irq 0x%x, rc %d\n",
629 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
630 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
635 adapter->bounce_buffer =
636 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
637 if (!adapter->bounce_buffer) {
639 goto err_out_free_irq;
641 adapter->bounce_buffer_dma =
642 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
643 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
644 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
645 netdev_err(netdev, "unable to map bounce buffer\n");
647 goto err_out_free_irq;
650 netdev_dbg(netdev, "initial replenish cycle\n");
651 ibmveth_interrupt(netdev->irq, netdev);
653 netif_start_queue(netdev);
655 netdev_dbg(netdev, "open complete\n");
660 free_irq(netdev->irq, netdev);
662 ibmveth_cleanup(adapter);
663 napi_disable(&adapter->napi);
667 static int ibmveth_close(struct net_device *netdev)
669 struct ibmveth_adapter *adapter = netdev_priv(netdev);
672 netdev_dbg(netdev, "close starting\n");
674 napi_disable(&adapter->napi);
676 if (!adapter->pool_config)
677 netif_stop_queue(netdev);
679 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
682 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
683 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
685 if (lpar_rc != H_SUCCESS) {
686 netdev_err(netdev, "h_free_logical_lan failed with %lx, "
687 "continuing with close\n", lpar_rc);
690 free_irq(netdev->irq, netdev);
692 adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) +
695 ibmveth_cleanup(adapter);
697 netdev_dbg(netdev, "close complete\n");
702 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
704 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
706 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
708 ethtool_cmd_speed_set(cmd, SPEED_1000);
709 cmd->duplex = DUPLEX_FULL;
710 cmd->port = PORT_FIBRE;
711 cmd->phy_address = 0;
712 cmd->transceiver = XCVR_INTERNAL;
713 cmd->autoneg = AUTONEG_ENABLE;
719 static void netdev_get_drvinfo(struct net_device *dev,
720 struct ethtool_drvinfo *info)
722 strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver));
723 strlcpy(info->version, ibmveth_driver_version, sizeof(info->version));
726 static netdev_features_t ibmveth_fix_features(struct net_device *dev,
727 netdev_features_t features)
730 * Since the ibmveth firmware interface does not have the
731 * concept of separate tx/rx checksum offload enable, if rx
732 * checksum is disabled we also have to disable tx checksum
733 * offload. Once we disable rx checksum offload, we are no
734 * longer allowed to send tx buffers that are not properly
738 if (!(features & NETIF_F_RXCSUM))
739 features &= ~NETIF_F_ALL_CSUM;
744 static int ibmveth_set_csum_offload(struct net_device *dev, u32 data)
746 struct ibmveth_adapter *adapter = netdev_priv(dev);
747 unsigned long set_attr, clr_attr, ret_attr;
748 unsigned long set_attr6, clr_attr6;
749 long ret, ret4, ret6;
750 int rc1 = 0, rc2 = 0;
753 if (netif_running(dev)) {
755 adapter->pool_config = 1;
757 adapter->pool_config = 0;
766 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
767 set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
769 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
770 clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
773 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
775 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
776 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
777 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
778 ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
779 set_attr, &ret_attr);
781 if (ret4 != H_SUCCESS) {
782 netdev_err(dev, "unable to change IPv4 checksum "
783 "offload settings. %d rc=%ld\n",
786 h_illan_attributes(adapter->vdev->unit_address,
787 set_attr, clr_attr, &ret_attr);
790 dev->features &= ~NETIF_F_IP_CSUM;
793 adapter->fw_ipv4_csum_support = data;
796 ret6 = h_illan_attributes(adapter->vdev->unit_address,
797 clr_attr6, set_attr6, &ret_attr);
799 if (ret6 != H_SUCCESS) {
800 netdev_err(dev, "unable to change IPv6 checksum "
801 "offload settings. %d rc=%ld\n",
804 h_illan_attributes(adapter->vdev->unit_address,
805 set_attr6, clr_attr6, &ret_attr);
808 dev->features &= ~NETIF_F_IPV6_CSUM;
811 adapter->fw_ipv6_csum_support = data;
813 if (ret4 == H_SUCCESS || ret6 == H_SUCCESS)
814 adapter->rx_csum = data;
819 netdev_err(dev, "unable to change checksum offload settings."
820 " %d rc=%ld ret_attr=%lx\n", data, ret,
825 rc2 = ibmveth_open(dev);
827 return rc1 ? rc1 : rc2;
830 static int ibmveth_set_features(struct net_device *dev,
831 netdev_features_t features)
833 struct ibmveth_adapter *adapter = netdev_priv(dev);
834 int rx_csum = !!(features & NETIF_F_RXCSUM);
837 if (rx_csum == adapter->rx_csum)
840 rc = ibmveth_set_csum_offload(dev, rx_csum);
841 if (rc && !adapter->rx_csum)
842 dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM);
847 static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
851 if (stringset != ETH_SS_STATS)
854 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
855 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
858 static int ibmveth_get_sset_count(struct net_device *dev, int sset)
862 return ARRAY_SIZE(ibmveth_stats);
868 static void ibmveth_get_ethtool_stats(struct net_device *dev,
869 struct ethtool_stats *stats, u64 *data)
872 struct ibmveth_adapter *adapter = netdev_priv(dev);
874 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
875 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
878 static const struct ethtool_ops netdev_ethtool_ops = {
879 .get_drvinfo = netdev_get_drvinfo,
880 .get_settings = netdev_get_settings,
881 .get_link = ethtool_op_get_link,
882 .get_strings = ibmveth_get_strings,
883 .get_sset_count = ibmveth_get_sset_count,
884 .get_ethtool_stats = ibmveth_get_ethtool_stats,
887 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
892 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
894 static int ibmveth_send(struct ibmveth_adapter *adapter,
895 union ibmveth_buf_desc *descs)
897 unsigned long correlator;
898 unsigned int retry_count;
902 * The retry count sets a maximum for the number of broadcast and
903 * multicast destinations within the system.
908 ret = h_send_logical_lan(adapter->vdev->unit_address,
909 descs[0].desc, descs[1].desc,
910 descs[2].desc, descs[3].desc,
911 descs[4].desc, descs[5].desc,
912 correlator, &correlator);
913 } while ((ret == H_BUSY) && (retry_count--));
915 if (ret != H_SUCCESS && ret != H_DROPPED) {
916 netdev_err(adapter->netdev, "tx: h_send_logical_lan failed "
917 "with rc=%ld\n", ret);
924 static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
925 struct net_device *netdev)
927 struct ibmveth_adapter *adapter = netdev_priv(netdev);
928 unsigned int desc_flags;
929 union ibmveth_buf_desc descs[6];
931 int force_bounce = 0;
935 * veth handles a maximum of 6 segments including the header, so
936 * we have to linearize the skb if there are more than this.
938 if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
939 netdev->stats.tx_dropped++;
943 /* veth can't checksum offload UDP */
944 if (skb->ip_summed == CHECKSUM_PARTIAL &&
945 ((skb->protocol == htons(ETH_P_IP) &&
946 ip_hdr(skb)->protocol != IPPROTO_TCP) ||
947 (skb->protocol == htons(ETH_P_IPV6) &&
948 ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
949 skb_checksum_help(skb)) {
951 netdev_err(netdev, "tx: failed to checksum packet\n");
952 netdev->stats.tx_dropped++;
956 desc_flags = IBMVETH_BUF_VALID;
958 if (skb->ip_summed == CHECKSUM_PARTIAL) {
959 unsigned char *buf = skb_transport_header(skb) +
962 desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
964 /* Need to zero out the checksum */
970 memset(descs, 0, sizeof(descs));
973 * If a linear packet is below the rx threshold then
974 * copy it into the static bounce buffer. This avoids the
975 * cost of a TCE insert and remove.
977 if (force_bounce || (!skb_is_nonlinear(skb) &&
978 (skb->len < tx_copybreak))) {
979 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
982 descs[0].fields.flags_len = desc_flags | skb->len;
983 descs[0].fields.address = adapter->bounce_buffer_dma;
985 if (ibmveth_send(adapter, descs)) {
986 adapter->tx_send_failed++;
987 netdev->stats.tx_dropped++;
989 netdev->stats.tx_packets++;
990 netdev->stats.tx_bytes += skb->len;
997 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
998 skb_headlen(skb), DMA_TO_DEVICE);
999 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
1002 descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
1003 descs[0].fields.address = dma_addr;
1006 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1007 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1009 dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0,
1010 skb_frag_size(frag), DMA_TO_DEVICE);
1012 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
1013 goto map_failed_frags;
1015 descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag);
1016 descs[i+1].fields.address = dma_addr;
1019 if (ibmveth_send(adapter, descs)) {
1020 adapter->tx_send_failed++;
1021 netdev->stats.tx_dropped++;
1023 netdev->stats.tx_packets++;
1024 netdev->stats.tx_bytes += skb->len;
1027 dma_unmap_single(&adapter->vdev->dev,
1028 descs[0].fields.address,
1029 descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1032 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++)
1033 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1034 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1039 return NETDEV_TX_OK;
1043 for (i = 0; i < last; i++)
1044 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1045 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1049 if (!firmware_has_feature(FW_FEATURE_CMO))
1050 netdev_err(netdev, "tx: unable to map xmit buffer\n");
1051 adapter->tx_map_failed++;
1057 static int ibmveth_poll(struct napi_struct *napi, int budget)
1059 struct ibmveth_adapter *adapter =
1060 container_of(napi, struct ibmveth_adapter, napi);
1061 struct net_device *netdev = adapter->netdev;
1062 int frames_processed = 0;
1063 unsigned long lpar_rc;
1067 if (!ibmveth_rxq_pending_buffer(adapter))
1071 if (!ibmveth_rxq_buffer_valid(adapter)) {
1072 wmb(); /* suggested by larson1 */
1073 adapter->rx_invalid_buffer++;
1074 netdev_dbg(netdev, "recycling invalid buffer\n");
1075 ibmveth_rxq_recycle_buffer(adapter);
1077 struct sk_buff *skb, *new_skb;
1078 int length = ibmveth_rxq_frame_length(adapter);
1079 int offset = ibmveth_rxq_frame_offset(adapter);
1080 int csum_good = ibmveth_rxq_csum_good(adapter);
1082 skb = ibmveth_rxq_get_buffer(adapter);
1085 if (length < rx_copybreak)
1086 new_skb = netdev_alloc_skb(netdev, length);
1089 skb_copy_to_linear_data(new_skb,
1093 ibmveth_flush_buffer(skb->data,
1095 if (!ibmveth_rxq_recycle_buffer(adapter))
1099 ibmveth_rxq_harvest_buffer(adapter);
1100 skb_reserve(skb, offset);
1103 skb_put(skb, length);
1104 skb->protocol = eth_type_trans(skb, netdev);
1107 skb->ip_summed = CHECKSUM_UNNECESSARY;
1109 netif_receive_skb(skb); /* send it up */
1111 netdev->stats.rx_packets++;
1112 netdev->stats.rx_bytes += length;
1115 } while (frames_processed < budget);
1117 ibmveth_replenish_task(adapter);
1119 if (frames_processed < budget) {
1120 /* We think we are done - reenable interrupts,
1121 * then check once more to make sure we are done.
1123 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1126 BUG_ON(lpar_rc != H_SUCCESS);
1128 napi_complete(napi);
1130 if (ibmveth_rxq_pending_buffer(adapter) &&
1131 napi_reschedule(napi)) {
1132 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1138 return frames_processed;
1141 static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
1143 struct net_device *netdev = dev_instance;
1144 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1145 unsigned long lpar_rc;
1147 if (napi_schedule_prep(&adapter->napi)) {
1148 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1150 BUG_ON(lpar_rc != H_SUCCESS);
1151 __napi_schedule(&adapter->napi);
1156 static void ibmveth_set_multicast_list(struct net_device *netdev)
1158 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1159 unsigned long lpar_rc;
1161 if ((netdev->flags & IFF_PROMISC) ||
1162 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
1163 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1164 IbmVethMcastEnableRecv |
1165 IbmVethMcastDisableFiltering,
1167 if (lpar_rc != H_SUCCESS) {
1168 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1169 "entering promisc mode\n", lpar_rc);
1172 struct netdev_hw_addr *ha;
1173 /* clear the filter table & disable filtering */
1174 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1175 IbmVethMcastEnableRecv |
1176 IbmVethMcastDisableFiltering |
1177 IbmVethMcastClearFilterTable,
1179 if (lpar_rc != H_SUCCESS) {
1180 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1181 "attempting to clear filter table\n",
1184 /* add the addresses to the filter table */
1185 netdev_for_each_mc_addr(ha, netdev) {
1186 /* add the multicast address to the filter table */
1187 unsigned long mcast_addr = 0;
1188 memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
1189 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1190 IbmVethMcastAddFilter,
1192 if (lpar_rc != H_SUCCESS) {
1193 netdev_err(netdev, "h_multicast_ctrl rc=%ld "
1194 "when adding an entry to the filter "
1195 "table\n", lpar_rc);
1199 /* re-enable filtering */
1200 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1201 IbmVethMcastEnableFiltering,
1203 if (lpar_rc != H_SUCCESS) {
1204 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1205 "enabling filtering\n", lpar_rc);
1210 static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1212 struct ibmveth_adapter *adapter = netdev_priv(dev);
1213 struct vio_dev *viodev = adapter->vdev;
1214 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
1216 int need_restart = 0;
1218 if (new_mtu < IBMVETH_MIN_MTU)
1221 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
1222 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1225 if (i == IBMVETH_NUM_BUFF_POOLS)
1228 /* Deactivate all the buffer pools so that the next loop can activate
1229 only the buffer pools necessary to hold the new MTU */
1230 if (netif_running(adapter->netdev)) {
1232 adapter->pool_config = 1;
1233 ibmveth_close(adapter->netdev);
1234 adapter->pool_config = 0;
1237 /* Look for an active buffer pool that can hold the new MTU */
1238 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1239 adapter->rx_buff_pool[i].active = 1;
1241 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
1243 vio_cmo_set_dev_desired(viodev,
1244 ibmveth_get_desired_dma
1247 return ibmveth_open(adapter->netdev);
1253 if (need_restart && (rc = ibmveth_open(adapter->netdev)))
1259 #ifdef CONFIG_NET_POLL_CONTROLLER
1260 static void ibmveth_poll_controller(struct net_device *dev)
1262 ibmveth_replenish_task(netdev_priv(dev));
1263 ibmveth_interrupt(dev->irq, dev);
1268 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1270 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1273 * Number of bytes of IO data the driver will need to perform well.
1275 static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1277 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1278 struct ibmveth_adapter *adapter;
1283 /* netdev inits at probe time along with the structures we need below*/
1285 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1287 adapter = netdev_priv(netdev);
1289 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1290 ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1292 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1293 /* add the size of the active receive buffers */
1294 if (adapter->rx_buff_pool[i].active)
1296 adapter->rx_buff_pool[i].size *
1297 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1299 rxqentries += adapter->rx_buff_pool[i].size;
1301 /* add the size of the receive queue entries */
1302 ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1307 static const struct net_device_ops ibmveth_netdev_ops = {
1308 .ndo_open = ibmveth_open,
1309 .ndo_stop = ibmveth_close,
1310 .ndo_start_xmit = ibmveth_start_xmit,
1311 .ndo_set_rx_mode = ibmveth_set_multicast_list,
1312 .ndo_do_ioctl = ibmveth_ioctl,
1313 .ndo_change_mtu = ibmveth_change_mtu,
1314 .ndo_fix_features = ibmveth_fix_features,
1315 .ndo_set_features = ibmveth_set_features,
1316 .ndo_validate_addr = eth_validate_addr,
1317 .ndo_set_mac_address = eth_mac_addr,
1318 #ifdef CONFIG_NET_POLL_CONTROLLER
1319 .ndo_poll_controller = ibmveth_poll_controller,
1323 static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
1326 struct net_device *netdev;
1327 struct ibmveth_adapter *adapter;
1328 unsigned char *mac_addr_p;
1329 unsigned int *mcastFilterSize_p;
1331 dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n",
1334 mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR,
1337 dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
1341 mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev,
1342 VETH_MCAST_FILTER_SIZE, NULL);
1343 if (!mcastFilterSize_p) {
1344 dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
1349 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1354 adapter = netdev_priv(netdev);
1355 dev_set_drvdata(&dev->dev, netdev);
1357 adapter->vdev = dev;
1358 adapter->netdev = netdev;
1359 adapter->mcastFilterSize = *mcastFilterSize_p;
1360 adapter->pool_config = 0;
1362 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1365 * Some older boxes running PHYP non-natively have an OF that returns
1366 * a 8-byte local-mac-address field (and the first 2 bytes have to be
1367 * ignored) while newer boxes' OF return a 6-byte field. Note that
1368 * IEEE 1275 specifies that local-mac-address must be a 6-byte field.
1369 * The RPA doc specifies that the first byte must be 10b, so we'll
1370 * just look for it to solve this 8 vs. 6 byte field issue
1372 if ((*mac_addr_p & 0x3) != 0x02)
1375 adapter->mac_addr = 0;
1376 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1378 netdev->irq = dev->irq;
1379 netdev->netdev_ops = &ibmveth_netdev_ops;
1380 netdev->ethtool_ops = &netdev_ethtool_ops;
1381 SET_NETDEV_DEV(netdev, &dev->dev);
1382 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
1383 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1384 netdev->features |= netdev->hw_features;
1386 memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
1388 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1389 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
1392 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1393 pool_count[i], pool_size[i],
1395 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1396 &dev->dev.kobj, "pool%d", i);
1398 kobject_uevent(kobj, KOBJ_ADD);
1401 netdev_dbg(netdev, "adapter @ 0x%p\n", adapter);
1403 adapter->buffer_list_dma = DMA_ERROR_CODE;
1404 adapter->filter_list_dma = DMA_ERROR_CODE;
1405 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1407 netdev_dbg(netdev, "registering netdev...\n");
1409 ibmveth_set_features(netdev, netdev->features);
1411 rc = register_netdev(netdev);
1414 netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc);
1415 free_netdev(netdev);
1419 netdev_dbg(netdev, "registered\n");
1424 static int ibmveth_remove(struct vio_dev *dev)
1426 struct net_device *netdev = dev_get_drvdata(&dev->dev);
1427 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1430 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
1431 kobject_put(&adapter->rx_buff_pool[i].kobj);
1433 unregister_netdev(netdev);
1435 free_netdev(netdev);
1436 dev_set_drvdata(&dev->dev, NULL);
1441 static struct attribute veth_active_attr;
1442 static struct attribute veth_num_attr;
1443 static struct attribute veth_size_attr;
1445 static ssize_t veth_pool_show(struct kobject *kobj,
1446 struct attribute *attr, char *buf)
1448 struct ibmveth_buff_pool *pool = container_of(kobj,
1449 struct ibmveth_buff_pool,
1452 if (attr == &veth_active_attr)
1453 return sprintf(buf, "%d\n", pool->active);
1454 else if (attr == &veth_num_attr)
1455 return sprintf(buf, "%d\n", pool->size);
1456 else if (attr == &veth_size_attr)
1457 return sprintf(buf, "%d\n", pool->buff_size);
1461 static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr,
1462 const char *buf, size_t count)
1464 struct ibmveth_buff_pool *pool = container_of(kobj,
1465 struct ibmveth_buff_pool,
1467 struct net_device *netdev = dev_get_drvdata(
1468 container_of(kobj->parent, struct device, kobj));
1469 struct ibmveth_adapter *adapter = netdev_priv(netdev);
1470 long value = simple_strtol(buf, NULL, 10);
1473 if (attr == &veth_active_attr) {
1474 if (value && !pool->active) {
1475 if (netif_running(netdev)) {
1476 if (ibmveth_alloc_buffer_pool(pool)) {
1478 "unable to alloc pool\n");
1482 adapter->pool_config = 1;
1483 ibmveth_close(netdev);
1484 adapter->pool_config = 0;
1485 if ((rc = ibmveth_open(netdev)))
1490 } else if (!value && pool->active) {
1491 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1493 /* Make sure there is a buffer pool with buffers that
1494 can hold a packet of the size of the MTU */
1495 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
1496 if (pool == &adapter->rx_buff_pool[i])
1498 if (!adapter->rx_buff_pool[i].active)
1500 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1504 if (i == IBMVETH_NUM_BUFF_POOLS) {
1505 netdev_err(netdev, "no active pool >= MTU\n");
1509 if (netif_running(netdev)) {
1510 adapter->pool_config = 1;
1511 ibmveth_close(netdev);
1513 adapter->pool_config = 0;
1514 if ((rc = ibmveth_open(netdev)))
1519 } else if (attr == &veth_num_attr) {
1520 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) {
1523 if (netif_running(netdev)) {
1524 adapter->pool_config = 1;
1525 ibmveth_close(netdev);
1526 adapter->pool_config = 0;
1528 if ((rc = ibmveth_open(netdev)))
1534 } else if (attr == &veth_size_attr) {
1535 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) {
1538 if (netif_running(netdev)) {
1539 adapter->pool_config = 1;
1540 ibmveth_close(netdev);
1541 adapter->pool_config = 0;
1542 pool->buff_size = value;
1543 if ((rc = ibmveth_open(netdev)))
1546 pool->buff_size = value;
1551 /* kick the interrupt handler to allocate/deallocate pools */
1552 ibmveth_interrupt(netdev->irq, netdev);
1557 #define ATTR(_name, _mode) \
1558 struct attribute veth_##_name##_attr = { \
1559 .name = __stringify(_name), .mode = _mode, \
1562 static ATTR(active, 0644);
1563 static ATTR(num, 0644);
1564 static ATTR(size, 0644);
1566 static struct attribute *veth_pool_attrs[] = {
1573 static const struct sysfs_ops veth_pool_ops = {
1574 .show = veth_pool_show,
1575 .store = veth_pool_store,
1578 static struct kobj_type ktype_veth_pool = {
1580 .sysfs_ops = &veth_pool_ops,
1581 .default_attrs = veth_pool_attrs,
1584 static int ibmveth_resume(struct device *dev)
1586 struct net_device *netdev = dev_get_drvdata(dev);
1587 ibmveth_interrupt(netdev->irq, netdev);
1591 static struct vio_device_id ibmveth_device_table[] = {
1592 { "network", "IBM,l-lan"},
1595 MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1597 static struct dev_pm_ops ibmveth_pm_ops = {
1598 .resume = ibmveth_resume
1601 static struct vio_driver ibmveth_driver = {
1602 .id_table = ibmveth_device_table,
1603 .probe = ibmveth_probe,
1604 .remove = ibmveth_remove,
1605 .get_desired_dma = ibmveth_get_desired_dma,
1606 .name = ibmveth_driver_name,
1607 .pm = &ibmveth_pm_ops,
1610 static int __init ibmveth_module_init(void)
1612 printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name,
1613 ibmveth_driver_string, ibmveth_driver_version);
1615 return vio_register_driver(&ibmveth_driver);
1618 static void __exit ibmveth_module_exit(void)
1620 vio_unregister_driver(&ibmveth_driver);
1623 module_init(ibmveth_module_init);
1624 module_exit(ibmveth_module_exit);