diff options
Diffstat (limited to 'drivers/net/ibmveth.c')
| -rw-r--r-- | drivers/net/ibmveth.c | 1204 |
1 files changed, 0 insertions, 1204 deletions
diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c deleted file mode 100644 index ceb98fd398a..00000000000 --- a/drivers/net/ibmveth.c +++ /dev/null @@ -1,1204 +0,0 @@ -/**************************************************************************/ -/* */ -/* 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: - - remove frag processing code - no longer needed - - add support for sysfs - - possibly remove procfs support -*/ - -#include <linux/config.h> -#include <linux/module.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 <asm/semaphore.h> -#include <asm/hvcall.h> -#include <asm/atomic.h> -#include <asm/iommu.h> -#include <asm/vio.h> -#include <asm/uaccess.h> -#include <linux/seq_file.h> - -#include "ibmveth.h" - -#undef DEBUG - -#define ibmveth_printk(fmt, args...) \ - printk(KERN_INFO "%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 net_device *dev, int *budget); -static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); -static struct net_device_stats *ibmveth_get_stats(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, struct pt_regs *regs); -static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); - -#ifdef CONFIG_PROC_FS -#define IBMVETH_PROC_DIR "net/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); - -/* simple methods of getting data from the current rxq entry */ -static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) -{ - return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle); -} - -static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) -{ - return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid); -} - -static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) -{ - return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset); -} - -static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) -{ - return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); -} - -/* 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) -{ - pool->size = pool_size; - pool->index = pool_index; - pool->buff_size = buff_size; - pool->threshold = pool_size / 2; -} - -/* 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; - pool->active = 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; - - mb(); - - for(i = 0; i < count; ++i) { - struct sk_buff *skb; - unsigned int free_index, index; - u64 correlator; - union ibmveth_buf_desc desc; - unsigned long lpar_rc; - dma_addr_t dma_addr; - - 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->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); - - 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.desc = 0; - desc.fields.valid = 1; - desc.fields.length = 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) { - pool->free_map[free_index] = index; - pool->skbuff[index] = NULL; - pool->consumer_index--; - 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++; - break; - } else { - buffers_added++; - adapter->replenish_add_buff_success++; - } - } - - 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 = 0; i < IbmVethNumBufferPools; 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; - } - pool->active = 0; -} - -/* 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].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.desc = 0; - desc.fields.valid = 1; - desc.fields.length = 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 inline 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; - - if(adapter->buffer_list_addr != NULL) { - if(!dma_mapping_error(adapter->buffer_list_dma)) { - dma_unmap_single(&adapter->vdev->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(adapter->filter_list_dma)) { - dma_unmap_single(&adapter->vdev->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(adapter->rx_queue.queue_dma)) { - dma_unmap_single(&adapter->vdev->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++) - ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[i]); -} - -static int ibmveth_open(struct net_device *netdev) -{ - struct ibmveth_adapter *adapter = netdev->priv; - u64 mac_address = 0; - int rxq_entries = 1; - unsigned long lpar_rc; - int rc; - union ibmveth_buf_desc rxq_desc; - int i; - - ibmveth_debug_printk("open starting\n"); - - 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); - 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); - return -ENOMEM; - } - - adapter->buffer_list_dma = dma_map_single(&adapter->vdev->dev, - adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); - adapter->filter_list_dma = dma_map_single(&adapter->vdev->dev, - adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); - adapter->rx_queue.queue_dma = dma_map_single(&adapter->vdev->dev, - adapter->rx_queue.queue_addr, - adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); - - if((dma_mapping_error(adapter->buffer_list_dma) ) || - (dma_mapping_error(adapter->filter_list_dma)) || - (dma_mapping_error(adapter->rx_queue.queue_dma))) { - ibmveth_error_printk("unable to map filter or buffer list pages\n"); - ibmveth_cleanup(adapter); - return -ENOMEM; - } - - adapter->rx_queue.index = 0; - adapter->rx_queue.num_slots = rxq_entries; - adapter->rx_queue.toggle = 1; - - /* call change_mtu to init the buffer pools based in initial mtu */ - ibmveth_change_mtu(netdev, netdev->mtu); - - memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); - mac_address = mac_address >> 16; - - rxq_desc.desc = 0; - rxq_desc.fields.valid = 1; - rxq_desc.fields.length = 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); - - - lpar_rc = h_register_logical_lan(adapter->vdev->unit_address, - adapter->buffer_list_dma, - rxq_desc.desc, - adapter->filter_list_dma, - 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%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n", - adapter->buffer_list_dma, - adapter->filter_list_dma, - rxq_desc.desc, - mac_address); - ibmveth_cleanup(adapter); - return -ENONET; - } - - 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_isLongBusy(rc) || (rc == H_Busy)); - - ibmveth_cleanup(adapter); - return rc; - } - - ibmveth_debug_printk("initial replenish cycle\n"); - ibmveth_interrupt(netdev->irq, netdev, NULL); - - 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; - long lpar_rc; - - ibmveth_debug_printk("close starting\n"); - - netif_stop_queue(netdev); - - free_irq(netdev->irq, netdev); - - do { - lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); - } while (H_isLongBusy(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 struct ethtool_ops netdev_ethtool_ops = { - .get_drvinfo = netdev_get_drvinfo, - .get_settings = netdev_get_settings, - .get_link = netdev_get_link, - .get_sg = ethtool_op_get_sg, - .get_tx_csum = ethtool_op_get_tx_csum, -}; - -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; - union ibmveth_buf_desc desc[IbmVethMaxSendFrags]; - unsigned long lpar_rc; - int nfrags = 0, curfrag; - 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; - - - if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) { - tx_dropped++; - goto out; - } - - memset(&desc, 0, sizeof(desc)); - - /* nfrags = number of frags after the initial fragment */ - nfrags = skb_shinfo(skb)->nr_frags; - - if(nfrags) - adapter->tx_multidesc_send++; - - /* map the initial fragment */ - desc[0].fields.length = nfrags ? skb->len - skb->data_len : skb->len; - desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, - desc[0].fields.length, DMA_TO_DEVICE); - desc[0].fields.valid = 1; - - if(dma_mapping_error(desc[0].fields.address)) { - ibmveth_error_printk("tx: unable to map initial fragment\n"); - tx_map_failed++; - tx_dropped++; - goto out; - } - - curfrag = nfrags; - - /* map fragments past the initial portion if there are any */ - while(curfrag--) { - skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag]; - desc[curfrag+1].fields.address - = dma_map_single(&adapter->vdev->dev, - page_address(frag->page) + frag->page_offset, - frag->size, DMA_TO_DEVICE); - desc[curfrag+1].fields.length = frag->size; - desc[curfrag+1].fields.valid = 1; - - if(dma_mapping_error(desc[curfrag+1].fields.address)) { - ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag); - tx_map_failed++; - tx_dropped++; - /* Free all the mappings we just created */ - while(curfrag < nfrags) { - dma_unmap_single(&adapter->vdev->dev, - desc[curfrag+1].fields.address, - desc[curfrag+1].fields.length, - DMA_TO_DEVICE); - curfrag++; - } - goto out; - } - } - - /* 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[0].desc, - desc[1].desc, - desc[2].desc, - desc[3].desc, - desc[4].desc, - desc[5].desc, - correlator); - } while ((lpar_rc == H_Busy) && (retry_count--)); - - if(lpar_rc != H_Success && lpar_rc != H_Dropped) { - int i; - ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc); - for(i = 0; i < 6; i++) { - ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i, - desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address); - } - tx_send_failed++; - tx_dropped++; - } else { - tx_packets++; - tx_bytes += skb->len; - netdev->trans_start = jiffies; - } - - do { - dma_unmap_single(&adapter->vdev->dev, - desc[nfrags].fields.address, - desc[nfrags].fields.length, DMA_TO_DEVICE); - } while(--nfrags >= 0); - -out: spin_lock_irqsave(&adapter->stats_lock, flags); - adapter->stats.tx_dropped += tx_dropped; - adapter->stats.tx_bytes += tx_bytes; - adapter->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 net_device *netdev, int *budget) -{ - struct ibmveth_adapter *adapter = netdev->priv; - int max_frames_to_process = netdev->quota; - int frames_processed = 0; - int more_work = 1; - unsigned long lpar_rc; - - restart_poll: - do { - struct net_device *netdev = adapter->netdev; - - if(ibmveth_rxq_pending_buffer(adapter)) { - struct sk_buff *skb; - - 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); - skb = ibmveth_rxq_get_buffer(adapter); - - ibmveth_rxq_harvest_buffer(adapter); - - skb_reserve(skb, offset); - skb_put(skb, length); - skb->dev = netdev; - skb->protocol = eth_type_trans(skb, netdev); - - netif_receive_skb(skb); /* send it up */ - - adapter->stats.rx_packets++; - adapter->stats.rx_bytes += length; - frames_processed++; - netdev->last_rx = jiffies; - } - } else { - more_work = 0; - } - } while(more_work && (frames_processed < max_frames_to_process)); - - ibmveth_replenish_task(adapter); - - if(more_work) { - /* more work to do - return that we are not done yet */ - netdev->quota -= frames_processed; - *budget -= frames_processed; - return 1; - } - - /* 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(netdev); - - if(ibmveth_rxq_pending_buffer(adapter) && netif_rx_reschedule(netdev, frames_processed)) - { - lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); - ibmveth_assert(lpar_rc == H_Success); - more_work = 1; - goto restart_poll; - } - - netdev->quota -= frames_processed; - *budget -= frames_processed; - - /* we really are done */ - return 0; -} - -static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance, struct pt_regs *regs) -{ - struct net_device *netdev = dev_instance; - struct ibmveth_adapter *adapter = netdev->priv; - unsigned long lpar_rc; - - if(netif_rx_schedule_prep(netdev)) { - lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); - ibmveth_assert(lpar_rc == H_Success); - __netif_rx_schedule(netdev); - } - return IRQ_HANDLED; -} - -static struct net_device_stats *ibmveth_get_stats(struct net_device *dev) -{ - struct ibmveth_adapter *adapter = dev->priv; - return &adapter->stats; -} - -static void ibmveth_set_multicast_list(struct net_device *netdev) -{ - struct ibmveth_adapter *adapter = netdev->priv; - 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 = dev->priv; - int i; - int prev_smaller = 1; - - if ((new_mtu < 68) || - (new_mtu > (pool_size[IbmVethNumBufferPools-1]) - IBMVETH_BUFF_OH)) - return -EINVAL; - - for(i = 0; i<IbmVethNumBufferPools; i++) { - int activate = 0; - if (new_mtu > (pool_size[i] - IBMVETH_BUFF_OH)) { - activate = 1; - prev_smaller= 1; - } else { - if (prev_smaller) - activate = 1; - prev_smaller= 0; - } - - if (activate && !adapter->rx_buff_pool[i].active) { - struct ibmveth_buff_pool *pool = - &adapter->rx_buff_pool[i]; - if(ibmveth_alloc_buffer_pool(pool)) { - ibmveth_error_printk("unable to alloc pool\n"); - return -ENOMEM; - } - adapter->rx_buff_pool[i].active = 1; - } else if (!activate && adapter->rx_buff_pool[i].active) { - adapter->rx_buff_pool[i].active = 0; - h_free_logical_lan_buffer(adapter->vdev->unit_address, - (u64)pool_size[i]); - } - - } - - /* kick the interrupt handler so that the new buffer pools get - replenished or deallocated */ - ibmveth_interrupt(dev->irq, dev, NULL); - - dev->mtu = new_mtu; - return 0; -} - -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 = NULL; - - 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, 0); - 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, 0); - 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; - - SET_MODULE_OWNER(netdev); - - adapter = netdev->priv; - memset(adapter, 0, sizeof(adapter)); - dev->dev.driver_data = netdev; - - adapter->vdev = dev; - adapter->netdev = netdev; - adapter->mcastFilterSize= *mcastFilterSize_p; - - /* 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); - - adapter->liobn = dev->iommu_table->it_index; - - netdev->irq = dev->irq; - netdev->open = ibmveth_open; - netdev->poll = ibmveth_poll; - netdev->weight = 16; - netdev->stop = ibmveth_close; - netdev->hard_start_xmit = ibmveth_start_xmit; - netdev->get_stats = ibmveth_get_stats; - 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); - 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++) - ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, - pool_count[i], pool_size[i]); - - 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"); - - 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; - - unregister_netdev(netdev); - - ibmveth_proc_unregister_adapter(adapter); - - free_netdev(netdev); - return 0; -} - -#ifdef CONFIG_PROC_FS -static void ibmveth_proc_register_driver(void) -{ - ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, NULL); - if (ibmveth_proc_dir) { - SET_MODULE_OWNER(ibmveth_proc_dir); - } -} - -static void ibmveth_proc_unregister_driver(void) -{ - remove_proc_entry(IBMVETH_PROC_DIR, NULL); -} - -static void *ibmveth_seq_start(struct seq_file *seq, loff_t *pos) -{ - if (*pos == 0) { - return (void *)1; - } else { - return NULL; - } -} - -static void *ibmveth_seq_next(struct seq_file *seq, void *v, loff_t *pos) -{ - ++*pos; - return NULL; -} - -static void ibmveth_seq_stop(struct seq_file *seq, void *v) -{ -} - -static int ibmveth_seq_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, "LIOBN: 0x%lx\n", adapter->liobn); - seq_printf(seq, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", - current_mac[0], current_mac[1], current_mac[2], - current_mac[3], current_mac[4], current_mac[5]); - seq_printf(seq, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", - firmware_mac[0], firmware_mac[1], firmware_mac[2], - firmware_mac[3], firmware_mac[4], firmware_mac[5]); - - seq_printf(seq, "\nAdapter Statistics:\n"); - seq_printf(seq, " TX: skbuffs linearized: %ld\n", adapter->tx_linearized); - seq_printf(seq, " multi-descriptor sends: %ld\n", adapter->tx_multidesc_send); - seq_printf(seq, " skb_linearize failures: %ld\n", adapter->tx_linearize_failed); - seq_printf(seq, " vio_map_single failres: %ld\n", adapter->tx_map_failed); - seq_printf(seq, " send failures: %ld\n", adapter->tx_send_failed); - seq_printf(seq, " RX: replenish task cycles: %ld\n", adapter->replenish_task_cycles); - seq_printf(seq, " alloc_skb_failures: %ld\n", adapter->replenish_no_mem); - seq_printf(seq, " add buffer failures: %ld\n", adapter->replenish_add_buff_failure); - seq_printf(seq, " invalid buffers: %ld\n", adapter->rx_invalid_buffer); - seq_printf(seq, " no buffers: %ld\n", adapter->rx_no_buffer); - - return 0; -} -static struct seq_operations ibmveth_seq_ops = { - .start = ibmveth_seq_start, - .next = ibmveth_seq_next, - .stop = ibmveth_seq_stop, - .show = ibmveth_seq_show, -}; - -static int ibmveth_proc_open(struct inode *inode, struct file *file) -{ - struct seq_file *seq; - struct proc_dir_entry *proc; - int rc; - - rc = seq_open(file, &ibmveth_seq_ops); - if (!rc) { - /* recover the pointer buried in proc_dir_entry data */ - seq = file->private_data; - proc = PDE(inode); - seq->private = proc->data; - } - return rc; -} - -static struct file_operations ibmveth_proc_fops = { - .owner = THIS_MODULE, - .open = ibmveth_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - -static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) -{ - struct proc_dir_entry *entry; - if (ibmveth_proc_dir) { - entry = create_proc_entry(adapter->netdev->name, S_IFREG, ibmveth_proc_dir); - if (!entry) { - ibmveth_error_printk("Cannot create adapter proc entry"); - } else { - entry->data = (void *) adapter; - entry->proc_fops = &ibmveth_proc_fops; - SET_MODULE_OWNER(entry); - } - } - return; -} - -static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) -{ - if (ibmveth_proc_dir) { - remove_proc_entry(adapter->netdev->name, 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 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, - .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); |