From 3449a2ab31681420515e242920e755262b4f41e9 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 17 Aug 2007 09:16:49 -0500 Subject: ibmveth: Remove dead frag processing code Removes dead frag processing code from ibmveth. Since NETIF_F_SG was not set, this code was never executed. Also, since the ibmveth interface can only handle 6 fragments, core networking code would need to be modified in order to efficiently enable this support. Signed-off-by: Brian King Signed-off-by: Jeff Garzik --- drivers/net/ibmveth.c | 100 +++++++++----------------------------------------- 1 file changed, 17 insertions(+), 83 deletions(-) (limited to 'drivers/net/ibmveth.c') diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c index 40cb00e37df6..f6be7b29c845 100644 --- a/drivers/net/ibmveth.c +++ b/drivers/net/ibmveth.c @@ -28,7 +28,6 @@ /**************************************************************************/ /* TODO: - - remove frag processing code - no longer needed - add support for sysfs - possibly remove procfs support */ @@ -128,9 +127,6 @@ struct ibmveth_stat ibmveth_stats[] = { { "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_multidesc_send", IBMVETH_STAT_OFF(tx_multidesc_send) }, - { "tx_linearized", IBMVETH_STAT_OFF(tx_linearized) }, - { "tx_linearize_failed", IBMVETH_STAT_OFF(tx_linearize_failed) }, { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, }; @@ -843,9 +839,8 @@ static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 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]; + union ibmveth_buf_desc desc; unsigned long lpar_rc; - int nfrags = 0, curfrag; unsigned long correlator; unsigned long flags; unsigned int retry_count; @@ -855,25 +850,11 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) 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; + desc.desc = 0; + desc.fields.length = skb->len; + desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data, + desc.fields.length, DMA_TO_DEVICE); + desc.fields.valid = 1; if (skb->ip_summed == CHECKSUM_PARTIAL && ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { @@ -885,75 +866,34 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) if (skb->ip_summed == CHECKSUM_PARTIAL) { unsigned char *buf = skb_transport_header(skb) + skb->csum_offset; - desc[0].fields.no_csum = 1; - desc[0].fields.csum_good = 1; + desc.fields.no_csum = 1; + desc.fields.csum_good = 1; /* Need to zero out the checksum */ buf[0] = 0; buf[1] = 0; } - if(dma_mapping_error(desc[0].fields.address)) { - ibmveth_error_printk("tx: unable to map initial fragment\n"); + if (dma_mapping_error(desc.fields.address)) { + ibmveth_error_printk("tx: unable to map xmit buffer\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 (skb->ip_summed == CHECKSUM_PARTIAL) { - desc[curfrag+1].fields.no_csum = 1; - desc[curfrag+1].fields.csum_good = 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, - &correlator); + 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) { - 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); - } + ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n", + desc.fields.valid, desc.fields.length, desc.fields.address); tx_send_failed++; tx_dropped++; } else { @@ -962,11 +902,8 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) 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); + dma_unmap_single(&adapter->vdev->dev, desc.fields.address, + desc.fields.length, DMA_TO_DEVICE); out: spin_lock_irqsave(&adapter->stats_lock, flags); adapter->stats.tx_dropped += tx_dropped; @@ -1366,10 +1303,7 @@ static int ibmveth_seq_show(struct seq_file *seq, void *v) 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, " TX: 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); -- cgit v1.2.1