/**************************************************************************/ /* */ /* 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. */ /* */ /**************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ibmveth.h" #undef DEBUG #ifdef DEBUG #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_assert(expr) #endif 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; 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 "); MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(ibmveth_driver_version); static unsigned int tx_copybreak __read_mostly = 128; module_param(tx_copybreak, uint, 0644); MODULE_PARM_DESC(tx_copybreak, "Maximum size of packet that is copied to a new buffer on transmit"); static unsigned int rx_copybreak __read_mostly = 128; module_param(rx_copybreak, uint, 0644); MODULE_PARM_DESC(rx_copybreak, "Maximum size of packet that is copied to a new buffer on receive"); static unsigned int rx_flush __read_mostly = 0; module_param(rx_flush, uint, 0644); MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); 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) }, { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, }; /* 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 * 7 / 8; 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 = kcalloc(pool->size, sizeof(void *), 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->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; } static inline void ibmveth_flush_buffer(void *addr, unsigned long length) { unsigned long offset; for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); } /* 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 = netdev_alloc_skb(adapter->netdev, pool->buff_size); if(!skb) { netdev_dbg(adapter->netdev, "replenish: unable to allocate skb\n"); adapter->replenish_no_mem++; break; } free_index = pool->consumer_index; pool->consumer_index++; if (pool->consumer_index >= pool->size) pool->consumer_index = 0; 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; if (rx_flush) { unsigned int len = min(pool->buff_size, adapter->netdev->mtu + IBMVETH_BUFF_OH); ibmveth_flush_buffer(skb->data, len); } 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 = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; if (pool->active && (atomic_read(&pool->available) < pool->threshold)) ibmveth_replenish_buffer_pool(adapter, pool); } 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 < IBMVETH_NUM_BUFF_POOLS); 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++; if (adapter->rx_buff_pool[pool].producer_index >= adapter->rx_buff_pool[pool].size) adapter->rx_buff_pool[pool].producer_index = 0; 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 < IBMVETH_NUM_BUFF_POOLS); 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 < IBMVETH_NUM_BUFF_POOLS); 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) { netdev_dbg(adapter->netdev, "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 < IBMVETH_NUM_BUFF_POOLS; 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; netdev_dbg(netdev, "open starting\n"); napi_enable(&adapter->napi); for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; 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) { netdev_err(netdev, "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) { netdev_err(netdev, "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))) { netdev_err(netdev, "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; netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr); netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr); netdev_dbg(netdev, "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) { netdev_err(netdev, "h_register_logical_lan failed with %ld\n", lpar_rc); netdev_err(netdev, "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 < IBMVETH_NUM_BUFF_POOLS; i++) { if(!adapter->rx_buff_pool[i].active) continue; if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { netdev_err(netdev, "unable to alloc pool\n"); adapter->rx_buff_pool[i].active = 0; ibmveth_cleanup(adapter); napi_disable(&adapter->napi); return -ENOMEM ; } } netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq); if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { netdev_err(netdev, "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) { netdev_err(netdev, "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)) { netdev_err(netdev, "unable to map bounce buffer\n"); ibmveth_cleanup(adapter); napi_disable(&adapter->napi); return -ENOMEM; } netdev_dbg(netdev, "initial replenish cycle\n"); ibmveth_interrupt(netdev->irq, netdev); netif_start_queue(netdev); netdev_dbg(netdev, "open complete\n"); return 0; } static int ibmveth_close(struct net_device *netdev) { struct ibmveth_adapter *adapter = netdev_priv(netdev); long lpar_rc; netdev_dbg(netdev, "close starting\n"); napi_disable(&adapter->napi); if (!adapter->pool_config) netif_stop_queue(netdev); h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); 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) { netdev_err(netdev, "h_free_logical_lan failed with %lx, " "continuing with close\n", lpar_rc); } free_irq(netdev->irq, netdev); adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); ibmveth_cleanup(adapter); netdev_dbg(netdev, "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; dev->features &= ~NETIF_F_IPV6_CSUM; } } static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) { struct ibmveth_adapter *adapter = netdev_priv(dev); if (data) { if (adapter->fw_ipv4_csum_support) dev->features |= NETIF_F_IP_CSUM; if (adapter->fw_ipv6_csum_support) dev->features |= NETIF_F_IPV6_CSUM; adapter->rx_csum = 1; } else { dev->features &= ~NETIF_F_IP_CSUM; dev->features &= ~NETIF_F_IPV6_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; unsigned long set_attr6, clr_attr6; long ret, ret6; 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; set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM; } else { clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; clr_attr6 = IBMVETH_ILLAN_IPV6_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) { netdev_err(dev, "unable to change IPv4 checksum " "offload settings. %d rc=%ld\n", data, ret); ret = h_illan_attributes(adapter->vdev->unit_address, set_attr, clr_attr, &ret_attr); } else adapter->fw_ipv4_csum_support = data; ret6 = h_illan_attributes(adapter->vdev->unit_address, clr_attr6, set_attr6, &ret_attr); if (ret6 != H_SUCCESS) { netdev_err(dev, "unable to change IPv6 checksum " "offload settings. %d rc=%ld\n", data, ret); ret = h_illan_attributes(adapter->vdev->unit_address, set_attr6, clr_attr6, &ret_attr); } else adapter->fw_ipv6_csum_support = data; if (ret == H_SUCCESS || ret6 == H_SUCCESS) done(dev, data); else rc1 = -EIO; } else { rc1 = -EIO; netdev_err(dev, "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 | NETIF_F_IPV6_CSUM))) return 0; if (!data && !(dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_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, .set_sg = ethtool_op_set_sg, }; 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_send(struct ibmveth_adapter *adapter, union ibmveth_buf_desc *descs) { unsigned long correlator; unsigned int retry_count; unsigned long ret; /* * The retry count sets a maximum for the number of broadcast and * multicast destinations within the system. */ retry_count = 1024; correlator = 0; do { ret = h_send_logical_lan(adapter->vdev->unit_address, descs[0].desc, descs[1].desc, descs[2].desc, descs[3].desc, descs[4].desc, descs[5].desc, correlator, &correlator); } while ((ret == H_BUSY) && (retry_count--)); if (ret != H_SUCCESS && ret != H_DROPPED) { netdev_err(adapter->netdev, "tx: h_send_logical_lan failed " "with rc=%ld\n", ret); return 1; } return 0; } static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) { struct ibmveth_adapter *adapter = netdev_priv(netdev); unsigned int desc_flags; union ibmveth_buf_desc descs[6]; int last, i; int force_bounce = 0; /* * veth handles a maximum of 6 segments including the header, so * we have to linearize the skb if there are more than this. */ if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { netdev->stats.tx_dropped++; goto out; } /* veth can't checksum offload UDP */ if (skb->ip_summed == CHECKSUM_PARTIAL && ((skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->protocol != IPPROTO_TCP) || (skb->protocol == htons(ETH_P_IPV6) && ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) && skb_checksum_help(skb)) { netdev_err(netdev, "tx: failed to checksum packet\n"); netdev->stats.tx_dropped++; goto out; } desc_flags = IBMVETH_BUF_VALID; if (skb->ip_summed == CHECKSUM_PARTIAL) { unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); /* Need to zero out the checksum */ buf[0] = 0; buf[1] = 0; } retry_bounce: memset(descs, 0, sizeof(descs)); /* * If a linear packet is below the rx threshold then * copy it into the static bounce buffer. This avoids the * cost of a TCE insert and remove. */ if (force_bounce || (!skb_is_nonlinear(skb) && (skb->len < tx_copybreak))) { skb_copy_from_linear_data(skb, adapter->bounce_buffer, skb->len); descs[0].fields.flags_len = desc_flags | skb->len; descs[0].fields.address = adapter->bounce_buffer_dma; if (ibmveth_send(adapter, descs)) { adapter->tx_send_failed++; netdev->stats.tx_dropped++; } else { netdev->stats.tx_packets++; netdev->stats.tx_bytes += skb->len; } goto out; } /* Map the header */ descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address)) goto map_failed; descs[0].fields.flags_len = desc_flags | skb_headlen(skb); /* Map the frags */ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { unsigned long dma_addr; skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; dma_addr = dma_map_page(&adapter->vdev->dev, frag->page, frag->page_offset, frag->size, DMA_TO_DEVICE); if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) goto map_failed_frags; descs[i+1].fields.flags_len = desc_flags | frag->size; descs[i+1].fields.address = dma_addr; } if (ibmveth_send(adapter, descs)) { adapter->tx_send_failed++; netdev->stats.tx_dropped++; } else { netdev->stats.tx_packets++; netdev->stats.tx_bytes += skb->len; } for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, DMA_TO_DEVICE); out: dev_kfree_skb(skb); return NETDEV_TX_OK; map_failed_frags: last = i+1; for (i = 0; i < last; i++) dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, DMA_TO_DEVICE); map_failed: if (!firmware_has_feature(FW_FEATURE_CMO)) netdev_err(netdev, "tx: unable to map xmit buffer\n"); adapter->tx_map_failed++; skb_linearize(skb); force_bounce = 1; goto retry_bounce; } 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 { if (!ibmveth_rxq_pending_buffer(adapter)) break; smp_rmb(); if (!ibmveth_rxq_buffer_valid(adapter)) { wmb(); /* suggested by larson1 */ adapter->rx_invalid_buffer++; netdev_dbg(netdev, "recycling invalid buffer\n"); ibmveth_rxq_recycle_buffer(adapter); } else { struct sk_buff *skb, *new_skb; 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); new_skb = NULL; if (length < rx_copybreak) new_skb = netdev_alloc_skb(netdev, length); if (new_skb) { skb_copy_to_linear_data(new_skb, skb->data + offset, length); if (rx_flush) ibmveth_flush_buffer(skb->data, length + offset); skb = new_skb; ibmveth_rxq_recycle_buffer(adapter); } else { ibmveth_rxq_harvest_buffer(adapter); skb_reserve(skb, offset); } skb_put(skb, length); skb->protocol = eth_type_trans(skb, netdev); if (csum_good) skb->ip_summed = CHECKSUM_UNNECESSARY; 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); napi_complete(napi); if (ibmveth_rxq_pending_buffer(adapter) && napi_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 (napi_schedule_prep(&adapter->napi)) { lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); ibmveth_assert(lpar_rc == H_SUCCESS); __napi_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(netdev) > adapter->mcastFilterSize)) { lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, IbmVethMcastEnableRecv | IbmVethMcastDisableFiltering, 0); if(lpar_rc != H_SUCCESS) { netdev_err(netdev, "h_multicast_ctrl rc=%ld when " "entering promisc mode\n", lpar_rc); } } else { struct netdev_hw_addr *ha; /* clear the filter table & disable filtering */ lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, IbmVethMcastEnableRecv | IbmVethMcastDisableFiltering | IbmVethMcastClearFilterTable, 0); if(lpar_rc != H_SUCCESS) { netdev_err(netdev, "h_multicast_ctrl rc=%ld when " "attempting to clear filter table\n", lpar_rc); } /* add the addresses to the filter table */ netdev_for_each_mc_addr(ha, netdev) { // add the multicast address to the filter table unsigned long mcast_addr = 0; memcpy(((char *)&mcast_addr)+2, ha->addr, 6); lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, IbmVethMcastAddFilter, mcast_addr); if(lpar_rc != H_SUCCESS) { netdev_err(netdev, "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) { netdev_err(netdev, "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, rc; int need_restart = 0; if (new_mtu < IBMVETH_MIN_MTU) return -EINVAL; for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) break; if (i == IBMVETH_NUM_BUFF_POOLS) return -EINVAL; /* Deactivate all the buffer pools so that the next loop can activate only the buffer pools necessary to hold the new MTU */ if (netif_running(adapter->netdev)) { need_restart = 1; adapter->pool_config = 1; ibmveth_close(adapter->netdev); adapter->pool_config = 0; } /* Look for an active buffer pool that can hold the new MTU */ for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) { adapter->rx_buff_pool[i].active = 1; if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { dev->mtu = new_mtu; vio_cmo_set_dev_desired(viodev, ibmveth_get_desired_dma (viodev)); if (need_restart) { return ibmveth_open(adapter->netdev); } return 0; } } if (need_restart && (rc = ibmveth_open(adapter->netdev))) return rc; 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 < IBMVETH_NUM_BUFF_POOLS; 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 const struct net_device_ops ibmveth_netdev_ops = { .ndo_open = ibmveth_open, .ndo_stop = ibmveth_close, .ndo_start_xmit = ibmveth_start_xmit, .ndo_set_multicast_list = ibmveth_set_multicast_list, .ndo_do_ioctl = ibmveth_ioctl, .ndo_change_mtu = ibmveth_change_mtu, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = ibmveth_poll_controller, #endif }; static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) { int rc, i; struct net_device *netdev; struct ibmveth_adapter *adapter; unsigned char *mac_addr_p; unsigned int *mcastFilterSize_p; dev_dbg(&dev->dev, "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) { dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); return 0; } mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, VETH_MCAST_FILTER_SIZE, NULL); if(!mcastFilterSize_p) { dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE " "attribute\n"); return 0; } netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); if(!netdev) return -ENOMEM; adapter = netdev_priv(netdev); dev_set_drvdata(&dev->dev, 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->netdev_ops = &ibmveth_netdev_ops; netdev->ethtool_ops = &netdev_ethtool_ops; SET_NETDEV_DEV(netdev, &dev->dev); netdev->features |= NETIF_F_SG; memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; 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); } netdev_dbg(netdev, "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; netdev_dbg(netdev, "registering netdev...\n"); ibmveth_set_csum_offload(netdev, 1, ibmveth_set_tx_csum_flags); rc = register_netdev(netdev); if(rc) { netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc); free_netdev(netdev); return rc; } netdev_dbg(netdev, "registered\n"); return 0; } static int __devexit ibmveth_remove(struct vio_dev *dev) { struct net_device *netdev = dev_get_drvdata(&dev->dev); struct ibmveth_adapter *adapter = netdev_priv(netdev); int i; for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) kobject_put(&adapter->rx_buff_pool[i].kobj); unregister_netdev(netdev); free_netdev(netdev); dev_set_drvdata(&dev->dev, NULL); return 0; } 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 = dev_get_drvdata( container_of(kobj->parent, struct device, kobj)); 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)) { netdev_err(netdev, "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 < IBMVETH_NUM_BUFF_POOLS; 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 == IBMVETH_NUM_BUFF_POOLS) { netdev_err(netdev, "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 const 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 int ibmveth_resume(struct device *dev) { struct net_device *netdev = dev_get_drvdata(dev); ibmveth_interrupt(netdev->irq, netdev); return 0; } static struct vio_device_id ibmveth_device_table[] __devinitdata= { { "network", "IBM,l-lan"}, { "", "" } }; MODULE_DEVICE_TABLE(vio, ibmveth_device_table); static struct dev_pm_ops ibmveth_pm_ops = { .resume = ibmveth_resume }; 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, .pm = &ibmveth_pm_ops, } }; static int __init ibmveth_module_init(void) { printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); return vio_register_driver(&ibmveth_driver); } static void __exit ibmveth_module_exit(void) { vio_unregister_driver(&ibmveth_driver); } module_init(ibmveth_module_init); module_exit(ibmveth_module_exit);