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netxen: fix ipv6 offload and tx cleanup
o fix the ip/tcp hdr offset in tx descriptors for ipv6. o cleanup xmit function, move the tso checks into separate function, this reduces unnecessary endian conversions back and forth. o optimize macros to initialize tx descriptors. Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dhananjay Phadke
David S. Miller
parent
2edbb45442
commit
391587c344
@ -308,27 +308,16 @@ struct netxen_ring_ctx {
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#define netxen_set_cmd_desc_ctxid(cmd_desc, var) \
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((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
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#define netxen_set_cmd_desc_flags(cmd_desc, val) \
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(cmd_desc)->flags_opcode = ((cmd_desc)->flags_opcode & \
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~cpu_to_le16(0x7f)) | cpu_to_le16((val) & 0x7f)
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#define netxen_set_cmd_desc_opcode(cmd_desc, val) \
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(cmd_desc)->flags_opcode = ((cmd_desc)->flags_opcode & \
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~cpu_to_le16((u16)0x3f << 7)) | cpu_to_le16(((val) & 0x3f) << 7)
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#define netxen_set_tx_port(_desc, _port) \
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(_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)
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#define netxen_set_cmd_desc_num_of_buff(cmd_desc, val) \
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(cmd_desc)->num_of_buffers_total_length = \
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((cmd_desc)->num_of_buffers_total_length & \
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~cpu_to_le32(0xff)) | cpu_to_le32((val) & 0xff)
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#define netxen_set_cmd_desc_totallength(cmd_desc, val) \
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(cmd_desc)->num_of_buffers_total_length = \
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((cmd_desc)->num_of_buffers_total_length & \
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~cpu_to_le32((u32)0xffffff << 8)) | \
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cpu_to_le32(((val) & 0xffffff) << 8)
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#define netxen_set_tx_flags_opcode(_desc, _flags, _opcode) \
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(_desc)->flags_opcode = \
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cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))
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#define netxen_get_cmd_desc_opcode(cmd_desc) \
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((le16_to_cpu((cmd_desc)->flags_opcode) >> 7) & 0x003f)
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#define netxen_get_cmd_desc_totallength(cmd_desc) \
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((le32_to_cpu((cmd_desc)->num_of_buffers_total_length) >> 8) & 0xffffff)
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#define netxen_set_tx_frags_len(_desc, _frags, _len) \
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(_desc)->num_of_buffers_total_length = \
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cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))
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struct cmd_desc_type0 {
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u8 tcp_hdr_offset; /* For LSO only */
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@ -757,7 +746,7 @@ extern char netxen_nic_driver_name[];
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*/
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struct netxen_skb_frag {
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u64 dma;
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u32 length;
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ulong length;
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};
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#define _netxen_set_bits(config_word, start, bits, val) {\
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@ -783,13 +772,7 @@ struct netxen_skb_frag {
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struct netxen_cmd_buffer {
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struct sk_buff *skb;
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struct netxen_skb_frag frag_array[MAX_BUFFERS_PER_CMD + 1];
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u32 total_length;
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u32 mss;
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u16 port;
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u8 cmd;
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u8 frag_count;
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unsigned long time_stamp;
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u32 state;
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u32 frag_count;
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};
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/* In rx_buffer, we do not need multiple fragments as is a single buffer */
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@ -1486,8 +1469,6 @@ void netxen_release_tx_buffers(struct netxen_adapter *adapter);
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void netxen_initialize_adapter_ops(struct netxen_adapter *adapter);
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int netxen_init_firmware(struct netxen_adapter *adapter);
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void netxen_tso_check(struct netxen_adapter *adapter,
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struct cmd_desc_type0 *desc, struct sk_buff *skb);
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void netxen_nic_clear_stats(struct netxen_adapter *adapter);
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void netxen_watchdog_task(struct work_struct *work);
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void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx,
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@ -508,12 +508,8 @@ netxen_send_cmd_descs(struct netxen_adapter *adapter,
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cmd_desc = &cmd_desc_arr[i];
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pbuf = &adapter->cmd_buf_arr[producer];
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pbuf->mss = 0;
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pbuf->total_length = 0;
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pbuf->skb = NULL;
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pbuf->cmd = 0;
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pbuf->frag_count = 0;
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pbuf->port = 0;
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/* adapter->ahw.cmd_desc_head[producer] = *cmd_desc; */
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memcpy(&adapter->ahw.cmd_desc_head[producer],
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@ -39,6 +39,7 @@
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#include "netxen_nic_phan_reg.h"
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#include <linux/dma-mapping.h>
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#include <linux/if_vlan.h>
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#include <net/ip.h>
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MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
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@ -1137,29 +1138,46 @@ static int netxen_nic_close(struct net_device *netdev)
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return 0;
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}
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void netxen_tso_check(struct netxen_adapter *adapter,
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static bool netxen_tso_check(struct net_device *netdev,
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struct cmd_desc_type0 *desc, struct sk_buff *skb)
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{
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if (desc->mss) {
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desc->total_hdr_length = (sizeof(struct ethhdr) +
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ip_hdrlen(skb) + tcp_hdrlen(skb));
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bool tso = false;
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u8 opcode = TX_ETHER_PKT;
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if ((NX_IS_REVISION_P3(adapter->ahw.revision_id)) &&
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(skb->protocol == htons(ETH_P_IPV6)))
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netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO6);
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else
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netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO);
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if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
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skb_shinfo(skb)->gso_size > 0) {
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desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
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desc->total_hdr_length =
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skb_transport_offset(skb) + tcp_hdrlen(skb);
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opcode = (skb->protocol == htons(ETH_P_IPV6)) ?
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TX_TCP_LSO6 : TX_TCP_LSO;
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tso = true;
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} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
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if (ip_hdr(skb)->protocol == IPPROTO_TCP)
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netxen_set_cmd_desc_opcode(desc, TX_TCP_PKT);
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else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
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netxen_set_cmd_desc_opcode(desc, TX_UDP_PKT);
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else
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return;
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u8 l4proto;
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if (skb->protocol == htons(ETH_P_IP)) {
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l4proto = ip_hdr(skb)->protocol;
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if (l4proto == IPPROTO_TCP)
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opcode = TX_TCP_PKT;
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else if(l4proto == IPPROTO_UDP)
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opcode = TX_UDP_PKT;
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} else if (skb->protocol == htons(ETH_P_IPV6)) {
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l4proto = ipv6_hdr(skb)->nexthdr;
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if (l4proto == IPPROTO_TCP)
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opcode = TX_TCPV6_PKT;
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else if(l4proto == IPPROTO_UDP)
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opcode = TX_UDPV6_PKT;
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}
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}
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desc->tcp_hdr_offset = skb_transport_offset(skb);
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desc->ip_hdr_offset = skb_network_offset(skb);
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netxen_set_tx_flags_opcode(desc, 0, opcode);
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return tso;
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}
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static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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@ -1167,33 +1185,20 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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struct netxen_adapter *adapter = netdev_priv(netdev);
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struct netxen_hardware_context *hw = &adapter->ahw;
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unsigned int first_seg_len = skb->len - skb->data_len;
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struct netxen_cmd_buffer *pbuf;
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struct netxen_skb_frag *buffrag;
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unsigned int i;
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struct cmd_desc_type0 *hwdesc;
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int i, k;
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u32 producer, consumer;
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u32 saved_producer = 0;
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struct cmd_desc_type0 *hwdesc;
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int k;
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struct netxen_cmd_buffer *pbuf = NULL;
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int frag_count;
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int no_of_desc;
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int frag_count, no_of_desc;
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u32 num_txd = adapter->max_tx_desc_count;
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bool is_tso = false;
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frag_count = skb_shinfo(skb)->nr_frags + 1;
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/* There 4 fragments per descriptor */
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no_of_desc = (frag_count + 3) >> 2;
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if (netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) {
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if (skb_shinfo(skb)->gso_size > 0) {
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no_of_desc++;
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if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
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sizeof(struct ethhdr)) >
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(sizeof(struct cmd_desc_type0) - 2)) {
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no_of_desc++;
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}
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}
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}
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producer = adapter->cmd_producer;
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smp_mb();
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@ -1205,34 +1210,22 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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}
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/* Copy the descriptors into the hardware */
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saved_producer = producer;
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hwdesc = &hw->cmd_desc_head[producer];
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memset(hwdesc, 0, sizeof(struct cmd_desc_type0));
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/* Take skb->data itself */
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pbuf = &adapter->cmd_buf_arr[producer];
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if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
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skb_shinfo(skb)->gso_size > 0) {
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pbuf->mss = skb_shinfo(skb)->gso_size;
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hwdesc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
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} else {
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pbuf->mss = 0;
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hwdesc->mss = 0;
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}
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pbuf->total_length = skb->len;
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is_tso = netxen_tso_check(netdev, hwdesc, skb);
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pbuf->skb = skb;
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pbuf->cmd = TX_ETHER_PKT;
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pbuf->frag_count = frag_count;
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pbuf->port = adapter->portnum;
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buffrag = &pbuf->frag_array[0];
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buffrag->dma = pci_map_single(adapter->pdev, skb->data, first_seg_len,
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PCI_DMA_TODEVICE);
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buffrag->length = first_seg_len;
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netxen_set_cmd_desc_totallength(hwdesc, skb->len);
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netxen_set_cmd_desc_num_of_buff(hwdesc, frag_count);
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netxen_set_cmd_desc_opcode(hwdesc, TX_ETHER_PKT);
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netxen_set_tx_frags_len(hwdesc, frag_count, skb->len);
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netxen_set_tx_port(hwdesc, adapter->portnum);
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netxen_set_cmd_desc_port(hwdesc, adapter->portnum);
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netxen_set_cmd_desc_ctxid(hwdesc, adapter->portnum);
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hwdesc->buffer1_length = cpu_to_le16(first_seg_len);
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hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
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@ -1285,16 +1278,12 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
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}
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producer = get_next_index(producer, num_txd);
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/* might change opcode to TX_TCP_LSO */
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netxen_tso_check(adapter, &hw->cmd_desc_head[saved_producer], skb);
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/* For LSO, we need to copy the MAC/IP/TCP headers into
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* the descriptor ring
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*/
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if (netxen_get_cmd_desc_opcode(&hw->cmd_desc_head[saved_producer])
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== TX_TCP_LSO) {
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if (is_tso) {
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int hdr_len, first_hdr_len, more_hdr;
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hdr_len = hw->cmd_desc_head[saved_producer].total_hdr_length;
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hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
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if (hdr_len > (sizeof(struct cmd_desc_type0) - 2)) {
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first_hdr_len = sizeof(struct cmd_desc_type0) - 2;
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more_hdr = 1;
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