diff options
Diffstat (limited to 'linux-2.6.29.6/drivers/net/ibmveth.c')
| -rw-r--r-- | linux-2.6.29.6/drivers/net/ibmveth.c | 1618 |
1 files changed, 1618 insertions, 0 deletions
diff --git a/linux-2.6.29.6/drivers/net/ibmveth.c b/linux-2.6.29.6/drivers/net/ibmveth.c new file mode 100644 index 000000000..dfa6348ac --- /dev/null +++ b/linux-2.6.29.6/drivers/net/ibmveth.c @@ -0,0 +1,1618 @@ +/**************************************************************************/ +/* */ +/* IBM eServer i/pSeries Virtual Ethernet Device Driver */ +/* Copyright (C) 2003 IBM Corp. */ +/* Originally written by Dave Larson (larson1@us.ibm.com) */ +/* Maintained by Santiago Leon (santil@us.ibm.com) */ +/* */ +/* This program is free software; you can redistribute it and/or modify */ +/* it under the terms of the GNU General Public License as published by */ +/* the Free Software Foundation; either version 2 of the License, or */ +/* (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program; if not, write to the Free Software */ +/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */ +/* USA */ +/* */ +/* This module contains the implementation of a virtual ethernet device */ +/* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */ +/* option of the RS/6000 Platform Architechture to interface with virtual */ +/* ethernet NICs that are presented to the partition by the hypervisor. */ +/* */ +/**************************************************************************/ +/* + TODO: + - add support for sysfs + - possibly remove procfs support +*/ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/mm.h> +#include <linux/ethtool.h> +#include <linux/proc_fs.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <net/net_namespace.h> +#include <asm/hvcall.h> +#include <asm/atomic.h> +#include <asm/vio.h> +#include <asm/iommu.h> +#include <asm/uaccess.h> +#include <asm/firmware.h> +#include <linux/seq_file.h> + +#include "ibmveth.h" + +#undef DEBUG + +#define ibmveth_printk(fmt, args...) \ + printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) + +#define ibmveth_error_printk(fmt, args...) \ + printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) + +#ifdef DEBUG +#define ibmveth_debug_printk_no_adapter(fmt, args...) \ + printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) +#define ibmveth_debug_printk(fmt, args...) \ + printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) +#define ibmveth_assert(expr) \ + if(!(expr)) { \ + printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ + BUG(); \ + } +#else +#define ibmveth_debug_printk_no_adapter(fmt, args...) +#define ibmveth_debug_printk(fmt, args...) +#define ibmveth_assert(expr) +#endif + +static int ibmveth_open(struct net_device *dev); +static int ibmveth_close(struct net_device *dev); +static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); +static int ibmveth_poll(struct napi_struct *napi, int budget); +static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); +static void ibmveth_set_multicast_list(struct net_device *dev); +static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); +static void ibmveth_proc_register_driver(void); +static void ibmveth_proc_unregister_driver(void); +static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); +static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); +static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); +static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); +static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); +static struct kobj_type ktype_veth_pool; + + +#ifdef CONFIG_PROC_FS +#define IBMVETH_PROC_DIR "ibmveth" +static struct proc_dir_entry *ibmveth_proc_dir; +#endif + +static const char ibmveth_driver_name[] = "ibmveth"; +static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; +#define ibmveth_driver_version "1.03" + +MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); +MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(ibmveth_driver_version); + +struct ibmveth_stat { + char name[ETH_GSTRING_LEN]; + int offset; +}; + +#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) +#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) + +struct ibmveth_stat ibmveth_stats[] = { + { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, + { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, + { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, + { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, + { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, + { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, + { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, + { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, +}; + +/* simple methods of getting data from the current rxq entry */ +static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) +{ + return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; +} + +static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) +{ + return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; +} + +static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) +{ + return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); +} + +static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) +{ + return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); +} + +static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) +{ + return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); +} + +static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) +{ + return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); +} + +static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) +{ + return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); +} + +/* setup the initial settings for a buffer pool */ +static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active) +{ + pool->size = pool_size; + pool->index = pool_index; + pool->buff_size = buff_size; + pool->threshold = pool_size / 2; + pool->active = pool_active; +} + +/* allocate and setup an buffer pool - called during open */ +static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) +{ + int i; + + pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); + + if(!pool->free_map) { + return -1; + } + + pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); + if(!pool->dma_addr) { + kfree(pool->free_map); + pool->free_map = NULL; + return -1; + } + + pool->skbuff = kmalloc(sizeof(void*) * pool->size, GFP_KERNEL); + + if(!pool->skbuff) { + kfree(pool->dma_addr); + pool->dma_addr = NULL; + + kfree(pool->free_map); + pool->free_map = NULL; + return -1; + } + + memset(pool->skbuff, 0, sizeof(void*) * pool->size); + memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); + + for(i = 0; i < pool->size; ++i) { + pool->free_map[i] = i; + } + + atomic_set(&pool->available, 0); + pool->producer_index = 0; + pool->consumer_index = 0; + + return 0; +} + +/* replenish the buffers for a pool. note that we don't need to + * skb_reserve these since they are used for incoming... + */ +static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) +{ + u32 i; + u32 count = pool->size - atomic_read(&pool->available); + u32 buffers_added = 0; + struct sk_buff *skb; + unsigned int free_index, index; + u64 correlator; + unsigned long lpar_rc; + dma_addr_t dma_addr; + + mb(); + + for(i = 0; i < count; ++i) { + union ibmveth_buf_desc desc; + + skb = alloc_skb(pool->buff_size, GFP_ATOMIC); + + if(!skb) { + ibmveth_debug_printk("replenish: unable to allocate skb\n"); + adapter->replenish_no_mem++; + break; + } + + free_index = pool->consumer_index; + pool->consumer_index = (pool->consumer_index + 1) % pool->size; + index = pool->free_map[free_index]; + + ibmveth_assert(index != IBM_VETH_INVALID_MAP); + ibmveth_assert(pool->skbuff[index] == NULL); + + dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, + pool->buff_size, DMA_FROM_DEVICE); + + if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) + goto failure; + + pool->free_map[free_index] = IBM_VETH_INVALID_MAP; + pool->dma_addr[index] = dma_addr; + pool->skbuff[index] = skb; + + correlator = ((u64)pool->index << 32) | index; + *(u64*)skb->data = correlator; + + desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; + desc.fields.address = dma_addr; + + lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); + + if (lpar_rc != H_SUCCESS) + goto failure; + else { + buffers_added++; + adapter->replenish_add_buff_success++; + } + } + + mb(); + atomic_add(buffers_added, &(pool->available)); + return; + +failure: + pool->free_map[free_index] = index; + pool->skbuff[index] = NULL; + if (pool->consumer_index == 0) + pool->consumer_index = pool->size - 1; + else + pool->consumer_index--; + if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) + dma_unmap_single(&adapter->vdev->dev, + pool->dma_addr[index], pool->buff_size, + DMA_FROM_DEVICE); + dev_kfree_skb_any(skb); + adapter->replenish_add_buff_failure++; + + mb(); + atomic_add(buffers_added, &(pool->available)); +} + +/* replenish routine */ +static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) +{ + int i; + + adapter->replenish_task_cycles++; + + for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) + if(adapter->rx_buff_pool[i].active) + ibmveth_replenish_buffer_pool(adapter, + &adapter->rx_buff_pool[i]); + + adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); +} + +/* empty and free ana buffer pool - also used to do cleanup in error paths */ +static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) +{ + int i; + + kfree(pool->free_map); + pool->free_map = NULL; + + if(pool->skbuff && pool->dma_addr) { + for(i = 0; i < pool->size; ++i) { + struct sk_buff *skb = pool->skbuff[i]; + if(skb) { + dma_unmap_single(&adapter->vdev->dev, + pool->dma_addr[i], + pool->buff_size, + DMA_FROM_DEVICE); + dev_kfree_skb_any(skb); + pool->skbuff[i] = NULL; + } + } + } + + if(pool->dma_addr) { + kfree(pool->dma_addr); + pool->dma_addr = NULL; + } + + if(pool->skbuff) { + kfree(pool->skbuff); + pool->skbuff = NULL; + } +} + +/* remove a buffer from a pool */ +static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) +{ + unsigned int pool = correlator >> 32; + unsigned int index = correlator & 0xffffffffUL; + unsigned int free_index; + struct sk_buff *skb; + + ibmveth_assert(pool < IbmVethNumBufferPools); + ibmveth_assert(index < adapter->rx_buff_pool[pool].size); + + skb = adapter->rx_buff_pool[pool].skbuff[index]; + + ibmveth_assert(skb != NULL); + + adapter->rx_buff_pool[pool].skbuff[index] = NULL; + + dma_unmap_single(&adapter->vdev->dev, + adapter->rx_buff_pool[pool].dma_addr[index], + adapter->rx_buff_pool[pool].buff_size, + DMA_FROM_DEVICE); + + free_index = adapter->rx_buff_pool[pool].producer_index; + adapter->rx_buff_pool[pool].producer_index + = (adapter->rx_buff_pool[pool].producer_index + 1) + % adapter->rx_buff_pool[pool].size; + adapter->rx_buff_pool[pool].free_map[free_index] = index; + + mb(); + + atomic_dec(&(adapter->rx_buff_pool[pool].available)); +} + +/* get the current buffer on the rx queue */ +static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) +{ + u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; + unsigned int pool = correlator >> 32; + unsigned int index = correlator & 0xffffffffUL; + + ibmveth_assert(pool < IbmVethNumBufferPools); + ibmveth_assert(index < adapter->rx_buff_pool[pool].size); + + return adapter->rx_buff_pool[pool].skbuff[index]; +} + +/* recycle the current buffer on the rx queue */ +static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) +{ + u32 q_index = adapter->rx_queue.index; + u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; + unsigned int pool = correlator >> 32; + unsigned int index = correlator & 0xffffffffUL; + union ibmveth_buf_desc desc; + unsigned long lpar_rc; + + ibmveth_assert(pool < IbmVethNumBufferPools); + ibmveth_assert(index < adapter->rx_buff_pool[pool].size); + + if(!adapter->rx_buff_pool[pool].active) { + ibmveth_rxq_harvest_buffer(adapter); + ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); + return; + } + + desc.fields.flags_len = IBMVETH_BUF_VALID | + adapter->rx_buff_pool[pool].buff_size; + desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; + + lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); + + if(lpar_rc != H_SUCCESS) { + ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); + ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); + } + + if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { + adapter->rx_queue.index = 0; + adapter->rx_queue.toggle = !adapter->rx_queue.toggle; + } +} + +static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) +{ + ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); + + if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { + adapter->rx_queue.index = 0; + adapter->rx_queue.toggle = !adapter->rx_queue.toggle; + } +} + +static void ibmveth_cleanup(struct ibmveth_adapter *adapter) +{ + int i; + struct device *dev = &adapter->vdev->dev; + + if(adapter->buffer_list_addr != NULL) { + if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { + dma_unmap_single(dev, adapter->buffer_list_dma, 4096, + DMA_BIDIRECTIONAL); + adapter->buffer_list_dma = DMA_ERROR_CODE; + } + free_page((unsigned long)adapter->buffer_list_addr); + adapter->buffer_list_addr = NULL; + } + + if(adapter->filter_list_addr != NULL) { + if (!dma_mapping_error(dev, adapter->filter_list_dma)) { + dma_unmap_single(dev, adapter->filter_list_dma, 4096, + DMA_BIDIRECTIONAL); + adapter->filter_list_dma = DMA_ERROR_CODE; + } + free_page((unsigned long)adapter->filter_list_addr); + adapter->filter_list_addr = NULL; + } + + if(adapter->rx_queue.queue_addr != NULL) { + if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) { + dma_unmap_single(dev, + adapter->rx_queue.queue_dma, + adapter->rx_queue.queue_len, + DMA_BIDIRECTIONAL); + adapter->rx_queue.queue_dma = DMA_ERROR_CODE; + } + kfree(adapter->rx_queue.queue_addr); + adapter->rx_queue.queue_addr = NULL; + } + + for(i = 0; i<IbmVethNumBufferPools; i++) + if (adapter->rx_buff_pool[i].active) + ibmveth_free_buffer_pool(adapter, + &adapter->rx_buff_pool[i]); + + if (adapter->bounce_buffer != NULL) { + if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { + dma_unmap_single(&adapter->vdev->dev, + adapter->bounce_buffer_dma, + adapter->netdev->mtu + IBMVETH_BUFF_OH, + DMA_BIDIRECTIONAL); + adapter->bounce_buffer_dma = DMA_ERROR_CODE; + } + kfree(adapter->bounce_buffer); + adapter->bounce_buffer = NULL; + } +} + +static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, + union ibmveth_buf_desc rxq_desc, u64 mac_address) +{ + int rc, try_again = 1; + + /* After a kexec the adapter will still be open, so our attempt to + * open it will fail. So if we get a failure we free the adapter and + * try again, but only once. */ +retry: + rc = h_register_logical_lan(adapter->vdev->unit_address, + adapter->buffer_list_dma, rxq_desc.desc, + adapter->filter_list_dma, mac_address); + + if (rc != H_SUCCESS && try_again) { + do { + rc = h_free_logical_lan(adapter->vdev->unit_address); + } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); + + try_again = 0; + goto retry; + } + + return rc; +} + +static int ibmveth_open(struct net_device *netdev) +{ + struct ibmveth_adapter *adapter = netdev_priv(netdev); + u64 mac_address = 0; + int rxq_entries = 1; + unsigned long lpar_rc; + int rc; + union ibmveth_buf_desc rxq_desc; + int i; + struct device *dev; + + ibmveth_debug_printk("open starting\n"); + + napi_enable(&adapter->napi); + + for(i = 0; i<IbmVethNumBufferPools; i++) + rxq_entries += adapter->rx_buff_pool[i].size; + + adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); + adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); + + if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { + ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENOMEM; + } + + adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; + adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); + + if(!adapter->rx_queue.queue_addr) { + ibmveth_error_printk("unable to allocate rx queue pages\n"); + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENOMEM; + } + + dev = &adapter->vdev->dev; + + adapter->buffer_list_dma = dma_map_single(dev, + adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); + adapter->filter_list_dma = dma_map_single(dev, + adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); + adapter->rx_queue.queue_dma = dma_map_single(dev, + adapter->rx_queue.queue_addr, + adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); + + if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || + (dma_mapping_error(dev, adapter->filter_list_dma)) || + (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) { + ibmveth_error_printk("unable to map filter or buffer list pages\n"); + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENOMEM; + } + + adapter->rx_queue.index = 0; + adapter->rx_queue.num_slots = rxq_entries; + adapter->rx_queue.toggle = 1; + + memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); + mac_address = mac_address >> 16; + + rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; + rxq_desc.fields.address = adapter->rx_queue.queue_dma; + + ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); + ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); + ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); + + h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); + + lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); + + if(lpar_rc != H_SUCCESS) { + ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); + ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n", + adapter->buffer_list_dma, + adapter->filter_list_dma, + rxq_desc.desc, + mac_address); + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENONET; + } + + for(i = 0; i<IbmVethNumBufferPools; i++) { + if(!adapter->rx_buff_pool[i].active) + continue; + if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { + ibmveth_error_printk("unable to alloc pool\n"); + adapter->rx_buff_pool[i].active = 0; + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENOMEM ; + } + } + + ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); + if((rc = request_irq(netdev->irq, &ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { + ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); + do { + rc = h_free_logical_lan(adapter->vdev->unit_address); + } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); + + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return rc; + } + + adapter->bounce_buffer = + kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); + if (!adapter->bounce_buffer) { + ibmveth_error_printk("unable to allocate bounce buffer\n"); + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENOMEM; + } + adapter->bounce_buffer_dma = + dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, + netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); + if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { + ibmveth_error_printk("unable to map bounce buffer\n"); + ibmveth_cleanup(adapter); + napi_disable(&adapter->napi); + return -ENOMEM; + } + + ibmveth_debug_printk("initial replenish cycle\n"); + ibmveth_interrupt(netdev->irq, netdev); + + netif_start_queue(netdev); + + ibmveth_debug_printk("open complete\n"); + + return 0; +} + +static int ibmveth_close(struct net_device *netdev) +{ + struct ibmveth_adapter *adapter = netdev_priv(netdev); + long lpar_rc; + + ibmveth_debug_printk("close starting\n"); + + napi_disable(&adapter->napi); + + if (!adapter->pool_config) + netif_stop_queue(netdev); + + free_irq(netdev->irq, netdev); + + do { + lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); + } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); + + if(lpar_rc != H_SUCCESS) + { + ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", + lpar_rc); + } + + adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); + + ibmveth_cleanup(adapter); + + ibmveth_debug_printk("close complete\n"); + + return 0; +} + +static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { + cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); + cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); + cmd->speed = SPEED_1000; + cmd->duplex = DUPLEX_FULL; + cmd->port = PORT_FIBRE; + cmd->phy_address = 0; + cmd->transceiver = XCVR_INTERNAL; + cmd->autoneg = AUTONEG_ENABLE; + cmd->maxtxpkt = 0; + cmd->maxrxpkt = 1; + return 0; +} + +static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { + strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); + strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); +} + +static u32 netdev_get_link(struct net_device *dev) { + return 1; +} + +static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + + if (data) + adapter->rx_csum = 1; + else { + /* + * Since the ibmveth firmware interface does not have the concept of + * separate tx/rx checksum offload enable, if rx checksum is disabled + * we also have to disable tx checksum offload. Once we disable rx + * checksum offload, we are no longer allowed to send tx buffers that + * are not properly checksummed. + */ + adapter->rx_csum = 0; + dev->features &= ~NETIF_F_IP_CSUM; + } +} + +static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + + if (data) { + dev->features |= NETIF_F_IP_CSUM; + adapter->rx_csum = 1; + } else + dev->features &= ~NETIF_F_IP_CSUM; +} + +static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, + void (*done) (struct net_device *, u32)) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + unsigned long set_attr, clr_attr, ret_attr; + long ret; + int rc1 = 0, rc2 = 0; + int restart = 0; + + if (netif_running(dev)) { + restart = 1; + adapter->pool_config = 1; + ibmveth_close(dev); + adapter->pool_config = 0; + } + + set_attr = 0; + clr_attr = 0; + + if (data) + set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; + else + clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; + + ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); + + if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && + !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && + (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { + ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, + set_attr, &ret_attr); + + if (ret != H_SUCCESS) { + rc1 = -EIO; + ibmveth_error_printk("unable to change checksum offload settings." + " %d rc=%ld\n", data, ret); + + ret = h_illan_attributes(adapter->vdev->unit_address, + set_attr, clr_attr, &ret_attr); + } else + done(dev, data); + } else { + rc1 = -EIO; + ibmveth_error_printk("unable to change checksum offload settings." + " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr); + } + + if (restart) + rc2 = ibmveth_open(dev); + + return rc1 ? rc1 : rc2; +} + +static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + + if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) + return 0; + + return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); +} + +static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + int rc = 0; + + if (data && (dev->features & NETIF_F_IP_CSUM)) + return 0; + if (!data && !(dev->features & NETIF_F_IP_CSUM)) + return 0; + + if (data && !adapter->rx_csum) + rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); + else + ibmveth_set_tx_csum_flags(dev, data); + + return rc; +} + +static u32 ibmveth_get_rx_csum(struct net_device *dev) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + return adapter->rx_csum; +} + +static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) +{ + int i; + + if (stringset != ETH_SS_STATS) + return; + + for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) + memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); +} + +static int ibmveth_get_sset_count(struct net_device *dev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return ARRAY_SIZE(ibmveth_stats); + default: + return -EOPNOTSUPP; + } +} + +static void ibmveth_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, u64 *data) +{ + int i; + struct ibmveth_adapter *adapter = netdev_priv(dev); + + for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) + data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); +} + +static const struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, + .get_settings = netdev_get_settings, + .get_link = netdev_get_link, + .set_tx_csum = ibmveth_set_tx_csum, + .get_rx_csum = ibmveth_get_rx_csum, + .set_rx_csum = ibmveth_set_rx_csum, + .get_strings = ibmveth_get_strings, + .get_sset_count = ibmveth_get_sset_count, + .get_ethtool_stats = ibmveth_get_ethtool_stats, +}; + +static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + return -EOPNOTSUPP; +} + +#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) + +static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + struct ibmveth_adapter *adapter = netdev_priv(netdev); + union ibmveth_buf_desc desc; + unsigned long lpar_rc; + unsigned long correlator; + unsigned long flags; + unsigned int retry_count; + unsigned int tx_dropped = 0; + unsigned int tx_bytes = 0; + unsigned int tx_packets = 0; + unsigned int tx_send_failed = 0; + unsigned int tx_map_failed = 0; + int used_bounce = 0; + unsigned long data_dma_addr; + + desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len; + + if (skb->ip_summed == CHECKSUM_PARTIAL && + ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { + ibmveth_error_printk("tx: failed to checksum packet\n"); + tx_dropped++; + goto out; + } + + if (skb->ip_summed == CHECKSUM_PARTIAL) { + unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; + + desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); + + /* Need to zero out the checksum */ + buf[0] = 0; + buf[1] = 0; + } + + data_dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, + skb->len, DMA_TO_DEVICE); + if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) { + if (!firmware_has_feature(FW_FEATURE_CMO)) + ibmveth_error_printk("tx: unable to map xmit buffer\n"); + skb_copy_from_linear_data(skb, adapter->bounce_buffer, + skb->len); + desc.fields.address = adapter->bounce_buffer_dma; + tx_map_failed++; + used_bounce = 1; + wmb(); + } else + desc.fields.address = data_dma_addr; + + /* send the frame. Arbitrarily set retrycount to 1024 */ + correlator = 0; + retry_count = 1024; + do { + lpar_rc = h_send_logical_lan(adapter->vdev->unit_address, + desc.desc, 0, 0, 0, 0, 0, + correlator, &correlator); + } while ((lpar_rc == H_BUSY) && (retry_count--)); + + if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) { + ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); + ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n", + (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0, + skb->len, desc.fields.address); + tx_send_failed++; + tx_dropped++; + } else { + tx_packets++; + tx_bytes += skb->len; + netdev->trans_start = jiffies; + } + + if (!used_bounce) + dma_unmap_single(&adapter->vdev->dev, data_dma_addr, + skb->len, DMA_TO_DEVICE); + +out: spin_lock_irqsave(&adapter->stats_lock, flags); + netdev->stats.tx_dropped += tx_dropped; + netdev->stats.tx_bytes += tx_bytes; + netdev->stats.tx_packets += tx_packets; + adapter->tx_send_failed += tx_send_failed; + adapter->tx_map_failed += tx_map_failed; + spin_unlock_irqrestore(&adapter->stats_lock, flags); + + dev_kfree_skb(skb); + return 0; +} + +static int ibmveth_poll(struct napi_struct *napi, int budget) +{ + struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); + struct net_device *netdev = adapter->netdev; + int frames_processed = 0; + unsigned long lpar_rc; + + restart_poll: + do { + struct sk_buff *skb; + + if (!ibmveth_rxq_pending_buffer(adapter)) + break; + + rmb(); + if (!ibmveth_rxq_buffer_valid(adapter)) { + wmb(); /* suggested by larson1 */ + adapter->rx_invalid_buffer++; + ibmveth_debug_printk("recycling invalid buffer\n"); + ibmveth_rxq_recycle_buffer(adapter); + } else { + int length = ibmveth_rxq_frame_length(adapter); + int offset = ibmveth_rxq_frame_offset(adapter); + int csum_good = ibmveth_rxq_csum_good(adapter); + + skb = ibmveth_rxq_get_buffer(adapter); + if (csum_good) + skb->ip_summed = CHECKSUM_UNNECESSARY; + + ibmveth_rxq_harvest_buffer(adapter); + + skb_reserve(skb, offset); + skb_put(skb, length); + skb->protocol = eth_type_trans(skb, netdev); + + netif_receive_skb(skb); /* send it up */ + + netdev->stats.rx_packets++; + netdev->stats.rx_bytes += length; + frames_processed++; + } + } while (frames_processed < budget); + + ibmveth_replenish_task(adapter); + + if (frames_processed < budget) { + /* We think we are done - reenable interrupts, + * then check once more to make sure we are done. + */ + lpar_rc = h_vio_signal(adapter->vdev->unit_address, + VIO_IRQ_ENABLE); + + ibmveth_assert(lpar_rc == H_SUCCESS); + + netif_rx_complete(napi); + + if (ibmveth_rxq_pending_buffer(adapter) && + netif_rx_reschedule(napi)) { + lpar_rc = h_vio_signal(adapter->vdev->unit_address, + VIO_IRQ_DISABLE); + goto restart_poll; + } + } + + return frames_processed; +} + +static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) +{ + struct net_device *netdev = dev_instance; + struct ibmveth_adapter *adapter = netdev_priv(netdev); + unsigned long lpar_rc; + + if (netif_rx_schedule_prep(&adapter->napi)) { + lpar_rc = h_vio_signal(adapter->vdev->unit_address, + VIO_IRQ_DISABLE); + ibmveth_assert(lpar_rc == H_SUCCESS); + __netif_rx_schedule(&adapter->napi); + } + return IRQ_HANDLED; +} + +static void ibmveth_set_multicast_list(struct net_device *netdev) +{ + struct ibmveth_adapter *adapter = netdev_priv(netdev); + unsigned long lpar_rc; + + if((netdev->flags & IFF_PROMISC) || (netdev->mc_count > adapter->mcastFilterSize)) { + lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, + IbmVethMcastEnableRecv | + IbmVethMcastDisableFiltering, + 0); + if(lpar_rc != H_SUCCESS) { + ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); + } + } else { + struct dev_mc_list *mclist = netdev->mc_list; + int i; + /* clear the filter table & disable filtering */ + lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, + IbmVethMcastEnableRecv | + IbmVethMcastDisableFiltering | + IbmVethMcastClearFilterTable, + 0); + if(lpar_rc != H_SUCCESS) { + ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); + } + /* add the addresses to the filter table */ + for(i = 0; i < netdev->mc_count; ++i, mclist = mclist->next) { + // add the multicast address to the filter table + unsigned long mcast_addr = 0; + memcpy(((char *)&mcast_addr)+2, mclist->dmi_addr, 6); + lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, + IbmVethMcastAddFilter, + mcast_addr); + if(lpar_rc != H_SUCCESS) { + ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); + } + } + + /* re-enable filtering */ + lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, + IbmVethMcastEnableFiltering, + 0); + if(lpar_rc != H_SUCCESS) { + ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); + } + } +} + +static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) +{ + struct ibmveth_adapter *adapter = netdev_priv(dev); + struct vio_dev *viodev = adapter->vdev; + int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; + int i; + + if (new_mtu < IBMVETH_MAX_MTU) + return -EINVAL; + + for (i = 0; i < IbmVethNumBufferPools; i++) + if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) + break; + + if (i == IbmVethNumBufferPools) + return -EINVAL; + + /* Deactivate all the buffer pools so that the next loop can activate + only the buffer pools necessary to hold the new MTU */ + for (i = 0; i < IbmVethNumBufferPools; i++) + if (adapter->rx_buff_pool[i].active) { + ibmveth_free_buffer_pool(adapter, + &adapter->rx_buff_pool[i]); + adapter->rx_buff_pool[i].active = 0; + } + + /* Look for an active buffer pool that can hold the new MTU */ + for(i = 0; i<IbmVethNumBufferPools; i++) { + adapter->rx_buff_pool[i].active = 1; + + if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { + if (netif_running(adapter->netdev)) { + adapter->pool_config = 1; + ibmveth_close(adapter->netdev); + adapter->pool_config = 0; + dev->mtu = new_mtu; + vio_cmo_set_dev_desired(viodev, + ibmveth_get_desired_dma + (viodev)); + return ibmveth_open(adapter->netdev); + } + dev->mtu = new_mtu; + vio_cmo_set_dev_desired(viodev, + ibmveth_get_desired_dma + (viodev)); + return 0; + } + } + return -EINVAL; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void ibmveth_poll_controller(struct net_device *dev) +{ + ibmveth_replenish_task(netdev_priv(dev)); + ibmveth_interrupt(dev->irq, dev); +} +#endif + +/** + * ibmveth_get_desired_dma - Calculate IO memory desired by the driver + * + * @vdev: struct vio_dev for the device whose desired IO mem is to be returned + * + * Return value: + * Number of bytes of IO data the driver will need to perform well. + */ +static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) +{ + struct net_device *netdev = dev_get_drvdata(&vdev->dev); + struct ibmveth_adapter *adapter; + unsigned long ret; + int i; + int rxqentries = 1; + + /* netdev inits at probe time along with the structures we need below*/ + if (netdev == NULL) + return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); + + adapter = netdev_priv(netdev); + + ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; + ret += IOMMU_PAGE_ALIGN(netdev->mtu); + + for (i = 0; i < IbmVethNumBufferPools; i++) { + /* add the size of the active receive buffers */ + if (adapter->rx_buff_pool[i].active) + ret += + adapter->rx_buff_pool[i].size * + IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. + buff_size); + rxqentries += adapter->rx_buff_pool[i].size; + } + /* add the size of the receive queue entries */ + ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); + + return ret; +} + +static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) +{ + int rc, i; + long ret; + struct net_device *netdev; + struct ibmveth_adapter *adapter; + unsigned long set_attr, ret_attr; + + unsigned char *mac_addr_p; + unsigned int *mcastFilterSize_p; + + + ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", + dev->unit_address); + + mac_addr_p = (unsigned char *) vio_get_attribute(dev, + VETH_MAC_ADDR, NULL); + if(!mac_addr_p) { + printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " + "attribute\n", __FILE__, __LINE__); + return 0; + } + + mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, + VETH_MCAST_FILTER_SIZE, NULL); + if(!mcastFilterSize_p) { + printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " + "VETH_MCAST_FILTER_SIZE attribute\n", + __FILE__, __LINE__); + return 0; + } + + netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); + + if(!netdev) + return -ENOMEM; + + adapter = netdev_priv(netdev); + dev->dev.driver_data = netdev; + + adapter->vdev = dev; + adapter->netdev = netdev; + adapter->mcastFilterSize= *mcastFilterSize_p; + adapter->pool_config = 0; + + netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); + + /* Some older boxes running PHYP non-natively have an OF that + returns a 8-byte local-mac-address field (and the first + 2 bytes have to be ignored) while newer boxes' OF return + a 6-byte field. Note that IEEE 1275 specifies that + local-mac-address must be a 6-byte field. + The RPA doc specifies that the first byte must be 10b, so + we'll just look for it to solve this 8 vs. 6 byte field issue */ + + if ((*mac_addr_p & 0x3) != 0x02) + mac_addr_p += 2; + + adapter->mac_addr = 0; + memcpy(&adapter->mac_addr, mac_addr_p, 6); + + netdev->irq = dev->irq; + netdev->open = ibmveth_open; + netdev->stop = ibmveth_close; + netdev->hard_start_xmit = ibmveth_start_xmit; + netdev->set_multicast_list = ibmveth_set_multicast_list; + netdev->do_ioctl = ibmveth_ioctl; + netdev->ethtool_ops = &netdev_ethtool_ops; + netdev->change_mtu = ibmveth_change_mtu; + SET_NETDEV_DEV(netdev, &dev->dev); +#ifdef CONFIG_NET_POLL_CONTROLLER + netdev->poll_controller = ibmveth_poll_controller; +#endif + netdev->features |= NETIF_F_LLTX; + spin_lock_init(&adapter->stats_lock); + + memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); + + for(i = 0; i<IbmVethNumBufferPools; i++) { + struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; + int error; + + ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, + pool_count[i], pool_size[i], + pool_active[i]); + error = kobject_init_and_add(kobj, &ktype_veth_pool, + &dev->dev.kobj, "pool%d", i); + if (!error) + kobject_uevent(kobj, KOBJ_ADD); + } + + ibmveth_debug_printk("adapter @ 0x%p\n", adapter); + + adapter->buffer_list_dma = DMA_ERROR_CODE; + adapter->filter_list_dma = DMA_ERROR_CODE; + adapter->rx_queue.queue_dma = DMA_ERROR_CODE; + + ibmveth_debug_printk("registering netdev...\n"); + + ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr); + + if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && + !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && + (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { + set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; + + ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr); + + if (ret == H_SUCCESS) { + adapter->rx_csum = 1; + netdev->features |= NETIF_F_IP_CSUM; + } else + ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr); + } + + rc = register_netdev(netdev); + + if(rc) { + ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); + free_netdev(netdev); + return rc; + } + + ibmveth_debug_printk("registered\n"); + + ibmveth_proc_register_adapter(adapter); + + return 0; +} + +static int __devexit ibmveth_remove(struct vio_dev *dev) +{ + struct net_device *netdev = dev->dev.driver_data; + struct ibmveth_adapter *adapter = netdev_priv(netdev); + int i; + + for(i = 0; i<IbmVethNumBufferPools; i++) + kobject_put(&adapter->rx_buff_pool[i].kobj); + + unregister_netdev(netdev); + + ibmveth_proc_unregister_adapter(adapter); + + free_netdev(netdev); + dev_set_drvdata(&dev->dev, NULL); + + return 0; +} + +#ifdef CONFIG_PROC_FS +static void ibmveth_proc_register_driver(void) +{ + ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net); + if (ibmveth_proc_dir) { + } +} + +static void ibmveth_proc_unregister_driver(void) +{ + remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net); +} + +static int ibmveth_show(struct seq_file *seq, void *v) +{ + struct ibmveth_adapter *adapter = seq->private; + char *current_mac = ((char*) &adapter->netdev->dev_addr); + char *firmware_mac = ((char*) &adapter->mac_addr) ; + + seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); + + seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); + seq_printf(seq, "Current MAC: %pM\n", current_mac); + seq_printf(seq, "Firmware MAC: %pM\n", firmware_mac); + + seq_printf(seq, "\nAdapter Statistics:\n"); + seq_printf(seq, " TX: vio_map_single failres: %lld\n", adapter->tx_map_failed); + seq_printf(seq, " send failures: %lld\n", adapter->tx_send_failed); + seq_printf(seq, " RX: replenish task cycles: %lld\n", adapter->replenish_task_cycles); + seq_printf(seq, " alloc_skb_failures: %lld\n", adapter->replenish_no_mem); + seq_printf(seq, " add buffer failures: %lld\n", adapter->replenish_add_buff_failure); + seq_printf(seq, " invalid buffers: %lld\n", adapter->rx_invalid_buffer); + seq_printf(seq, " no buffers: %lld\n", adapter->rx_no_buffer); + + return 0; +} + +static int ibmveth_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, ibmveth_show, PDE(inode)->data); +} + +static const struct file_operations ibmveth_proc_fops = { + .owner = THIS_MODULE, + .open = ibmveth_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) +{ + struct proc_dir_entry *entry; + if (ibmveth_proc_dir) { + char u_addr[10]; + sprintf(u_addr, "%x", adapter->vdev->unit_address); + entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir, + &ibmveth_proc_fops, adapter); + if (!entry) + ibmveth_error_printk("Cannot create adapter proc entry"); + } + return; +} + +static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) +{ + if (ibmveth_proc_dir) { + char u_addr[10]; + sprintf(u_addr, "%x", adapter->vdev->unit_address); + remove_proc_entry(u_addr, ibmveth_proc_dir); + } +} + +#else /* CONFIG_PROC_FS */ +static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) +{ +} + +static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) +{ +} +static void ibmveth_proc_register_driver(void) +{ +} + +static void ibmveth_proc_unregister_driver(void) +{ +} +#endif /* CONFIG_PROC_FS */ + +static struct attribute veth_active_attr; +static struct attribute veth_num_attr; +static struct attribute veth_size_attr; + +static ssize_t veth_pool_show(struct kobject * kobj, + struct attribute * attr, char * buf) +{ + struct ibmveth_buff_pool *pool = container_of(kobj, + struct ibmveth_buff_pool, + kobj); + + if (attr == &veth_active_attr) + return sprintf(buf, "%d\n", pool->active); + else if (attr == &veth_num_attr) + return sprintf(buf, "%d\n", pool->size); + else if (attr == &veth_size_attr) + return sprintf(buf, "%d\n", pool->buff_size); + return 0; +} + +static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, +const char * buf, size_t count) +{ + struct ibmveth_buff_pool *pool = container_of(kobj, + struct ibmveth_buff_pool, + kobj); + struct net_device *netdev = + container_of(kobj->parent, struct device, kobj)->driver_data; + struct ibmveth_adapter *adapter = netdev_priv(netdev); + long value = simple_strtol(buf, NULL, 10); + long rc; + + if (attr == &veth_active_attr) { + if (value && !pool->active) { + if (netif_running(netdev)) { + if(ibmveth_alloc_buffer_pool(pool)) { + ibmveth_error_printk("unable to alloc pool\n"); + return -ENOMEM; + } + pool->active = 1; + adapter->pool_config = 1; + ibmveth_close(netdev); + adapter->pool_config = 0; + if ((rc = ibmveth_open(netdev))) + return rc; + } else + pool->active = 1; + } else if (!value && pool->active) { + int mtu = netdev->mtu + IBMVETH_BUFF_OH; + int i; + /* Make sure there is a buffer pool with buffers that + can hold a packet of the size of the MTU */ + for (i = 0; i < IbmVethNumBufferPools; i++) { + if (pool == &adapter->rx_buff_pool[i]) + continue; + if (!adapter->rx_buff_pool[i].active) + continue; + if (mtu <= adapter->rx_buff_pool[i].buff_size) + break; + } + + if (i == IbmVethNumBufferPools) { + ibmveth_error_printk("no active pool >= MTU\n"); + return -EPERM; + } + + if (netif_running(netdev)) { + adapter->pool_config = 1; + ibmveth_close(netdev); + pool->active = 0; + adapter->pool_config = 0; + if ((rc = ibmveth_open(netdev))) + return rc; + } + pool->active = 0; + } + } else if (attr == &veth_num_attr) { + if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) + return -EINVAL; + else { + if (netif_running(netdev)) { + adapter->pool_config = 1; + ibmveth_close(netdev); + adapter->pool_config = 0; + pool->size = value; + if ((rc = ibmveth_open(netdev))) + return rc; + } else + pool->size = value; + } + } else if (attr == &veth_size_attr) { + if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) + return -EINVAL; + else { + if (netif_running(netdev)) { + adapter->pool_config = 1; + ibmveth_close(netdev); + adapter->pool_config = 0; + pool->buff_size = value; + if ((rc = ibmveth_open(netdev))) + return rc; + } else + pool->buff_size = value; + } + } + + /* kick the interrupt handler to allocate/deallocate pools */ + ibmveth_interrupt(netdev->irq, netdev); + return count; +} + + +#define ATTR(_name, _mode) \ + struct attribute veth_##_name##_attr = { \ + .name = __stringify(_name), .mode = _mode, \ + }; + +static ATTR(active, 0644); +static ATTR(num, 0644); +static ATTR(size, 0644); + +static struct attribute * veth_pool_attrs[] = { + &veth_active_attr, + &veth_num_attr, + &veth_size_attr, + NULL, +}; + +static struct sysfs_ops veth_pool_ops = { + .show = veth_pool_show, + .store = veth_pool_store, +}; + +static struct kobj_type ktype_veth_pool = { + .release = NULL, + .sysfs_ops = &veth_pool_ops, + .default_attrs = veth_pool_attrs, +}; + + +static struct vio_device_id ibmveth_device_table[] __devinitdata= { + { "network", "IBM,l-lan"}, + { "", "" } +}; +MODULE_DEVICE_TABLE(vio, ibmveth_device_table); + +static struct vio_driver ibmveth_driver = { + .id_table = ibmveth_device_table, + .probe = ibmveth_probe, + .remove = ibmveth_remove, + .get_desired_dma = ibmveth_get_desired_dma, + .driver = { + .name = ibmveth_driver_name, + .owner = THIS_MODULE, + } +}; + +static int __init ibmveth_module_init(void) +{ + ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); + + ibmveth_proc_register_driver(); + + return vio_register_driver(&ibmveth_driver); +} + +static void __exit ibmveth_module_exit(void) +{ + vio_unregister_driver(&ibmveth_driver); + ibmveth_proc_unregister_driver(); +} + +module_init(ibmveth_module_init); +module_exit(ibmveth_module_exit); |