forked from Minki/linux
Merge branch 'r8152'
Hayes Wang says: ==================== r8152: tx/rx improvement - Select the suitable spin lock for each function. - Add additional check to reduce the spin lock. - Up the priority of the tx to avoid interrupted by rx. - Support rx checksum, large send, and IPv6 hw checksum. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
commit
a5d5ff572c
@ -21,9 +21,10 @@
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#include <linux/list.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <net/ip6_checksum.h>
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/* Version Information */
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#define DRIVER_VERSION "v1.05.0 (2014/02/18)"
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#define DRIVER_VERSION "v1.06.0 (2014/03/03)"
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#define DRIVER_AUTHOR "Realtek linux nic maintainers <nic_swsd@realtek.com>"
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#define DRIVER_DESC "Realtek RTL8152/RTL8153 Based USB Ethernet Adapters"
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#define MODULENAME "r8152"
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@ -447,6 +448,7 @@ enum rtl8152_flags {
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RTL8152_LINK_CHG,
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SELECTIVE_SUSPEND,
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PHY_RESET,
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SCHEDULE_TASKLET,
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};
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/* Define these values to match your device */
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@ -466,8 +468,18 @@ enum rtl8152_flags {
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struct rx_desc {
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__le32 opts1;
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#define RX_LEN_MASK 0x7fff
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__le32 opts2;
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#define RD_UDP_CS (1 << 23)
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#define RD_TCP_CS (1 << 22)
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#define RD_IPV6_CS (1 << 20)
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#define RD_IPV4_CS (1 << 19)
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__le32 opts3;
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#define IPF (1 << 23) /* IP checksum fail */
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#define UDPF (1 << 22) /* UDP checksum fail */
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#define TCPF (1 << 21) /* TCP checksum fail */
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__le32 opts4;
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__le32 opts5;
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__le32 opts6;
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@ -477,13 +489,21 @@ struct tx_desc {
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__le32 opts1;
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#define TX_FS (1 << 31) /* First segment of a packet */
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#define TX_LS (1 << 30) /* Final segment of a packet */
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#define TX_LEN_MASK 0x3ffff
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#define GTSENDV4 (1 << 28)
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#define GTSENDV6 (1 << 27)
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#define GTTCPHO_SHIFT 18
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#define GTTCPHO_MAX 0x7fU
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#define TX_LEN_MAX 0x3ffffU
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__le32 opts2;
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#define UDP_CS (1 << 31) /* Calculate UDP/IP checksum */
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#define TCP_CS (1 << 30) /* Calculate TCP/IP checksum */
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#define IPV4_CS (1 << 29) /* Calculate IPv4 checksum */
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#define IPV6_CS (1 << 28) /* Calculate IPv6 checksum */
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#define MSS_SHIFT 17
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#define MSS_MAX 0x7ffU
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#define TCPHO_SHIFT 17
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#define TCPHO_MAX 0x7ffU
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};
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struct r8152;
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@ -550,12 +570,21 @@ enum rtl_version {
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RTL_VER_MAX
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};
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enum tx_csum_stat {
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TX_CSUM_SUCCESS = 0,
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TX_CSUM_TSO,
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TX_CSUM_NONE
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};
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/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
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* The RTL chips use a 64 element hash table based on the Ethernet CRC.
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*/
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static const int multicast_filter_limit = 32;
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static unsigned int rx_buf_sz = 16384;
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#define RTL_LIMITED_TSO_SIZE (rx_buf_sz - sizeof(struct tx_desc) - \
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VLAN_ETH_HLEN - VLAN_HLEN)
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static
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int get_registers(struct r8152 *tp, u16 value, u16 index, u16 size, void *data)
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{
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@ -963,7 +992,6 @@ static int rtl8152_set_mac_address(struct net_device *netdev, void *p)
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static void read_bulk_callback(struct urb *urb)
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{
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struct net_device *netdev;
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unsigned long flags;
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int status = urb->status;
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struct rx_agg *agg;
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struct r8152 *tp;
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@ -997,9 +1025,9 @@ static void read_bulk_callback(struct urb *urb)
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if (urb->actual_length < ETH_ZLEN)
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break;
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spin_lock_irqsave(&tp->rx_lock, flags);
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spin_lock(&tp->rx_lock);
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list_add_tail(&agg->list, &tp->rx_done);
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spin_unlock_irqrestore(&tp->rx_lock, flags);
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spin_unlock(&tp->rx_lock);
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tasklet_schedule(&tp->tl);
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return;
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case -ESHUTDOWN:
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@ -1022,9 +1050,9 @@ static void read_bulk_callback(struct urb *urb)
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if (result == -ENODEV) {
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netif_device_detach(tp->netdev);
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} else if (result) {
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spin_lock_irqsave(&tp->rx_lock, flags);
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spin_lock(&tp->rx_lock);
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list_add_tail(&agg->list, &tp->rx_done);
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spin_unlock_irqrestore(&tp->rx_lock, flags);
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spin_unlock(&tp->rx_lock);
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tasklet_schedule(&tp->tl);
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}
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}
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@ -1033,7 +1061,6 @@ static void write_bulk_callback(struct urb *urb)
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{
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struct net_device_stats *stats;
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struct net_device *netdev;
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unsigned long flags;
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struct tx_agg *agg;
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struct r8152 *tp;
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int status = urb->status;
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@ -1057,9 +1084,9 @@ static void write_bulk_callback(struct urb *urb)
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stats->tx_bytes += agg->skb_len;
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}
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spin_lock_irqsave(&tp->tx_lock, flags);
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spin_lock(&tp->tx_lock);
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list_add_tail(&agg->list, &tp->tx_free);
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spin_unlock_irqrestore(&tp->tx_lock, flags);
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spin_unlock(&tp->tx_lock);
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usb_autopm_put_interface_async(tp->intf);
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@ -1073,7 +1100,7 @@ static void write_bulk_callback(struct urb *urb)
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return;
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if (!skb_queue_empty(&tp->tx_queue))
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schedule_delayed_work(&tp->schedule, 0);
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tasklet_schedule(&tp->tl);
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}
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static void intr_callback(struct urb *urb)
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@ -1268,6 +1295,9 @@ static struct tx_agg *r8152_get_tx_agg(struct r8152 *tp)
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struct tx_agg *agg = NULL;
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unsigned long flags;
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if (list_empty(&tp->tx_free))
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return NULL;
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spin_lock_irqsave(&tp->tx_lock, flags);
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if (!list_empty(&tp->tx_free)) {
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struct list_head *cursor;
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@ -1281,24 +1311,130 @@ static struct tx_agg *r8152_get_tx_agg(struct r8152 *tp)
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return agg;
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}
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static void
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r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc, struct sk_buff *skb)
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static inline __be16 get_protocol(struct sk_buff *skb)
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{
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memset(desc, 0, sizeof(*desc));
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__be16 protocol;
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desc->opts1 = cpu_to_le32((skb->len & TX_LEN_MASK) | TX_FS | TX_LS);
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if (skb->protocol == htons(ETH_P_8021Q))
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protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
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else
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protocol = skb->protocol;
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if (skb->ip_summed == CHECKSUM_PARTIAL) {
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__be16 protocol;
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return protocol;
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}
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/*
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* r8152_csum_workaround()
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* The hw limites the value the transport offset. When the offset is out of the
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* range, calculate the checksum by sw.
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*/
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static void r8152_csum_workaround(struct r8152 *tp, struct sk_buff *skb,
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struct sk_buff_head *list)
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{
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if (skb_shinfo(skb)->gso_size) {
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netdev_features_t features = tp->netdev->features;
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struct sk_buff_head seg_list;
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struct sk_buff *segs, *nskb;
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features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO);
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segs = skb_gso_segment(skb, features);
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if (IS_ERR(segs) || !segs)
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goto drop;
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__skb_queue_head_init(&seg_list);
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do {
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nskb = segs;
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segs = segs->next;
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nskb->next = NULL;
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__skb_queue_tail(&seg_list, nskb);
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} while (segs);
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skb_queue_splice(&seg_list, list);
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dev_kfree_skb(skb);
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} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
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if (skb_checksum_help(skb) < 0)
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goto drop;
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__skb_queue_head(list, skb);
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} else {
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struct net_device_stats *stats;
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drop:
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stats = &tp->netdev->stats;
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stats->tx_dropped++;
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dev_kfree_skb(skb);
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}
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}
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/*
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* msdn_giant_send_check()
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* According to the document of microsoft, the TCP Pseudo Header excludes the
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* packet length for IPv6 TCP large packets.
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*/
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static int msdn_giant_send_check(struct sk_buff *skb)
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{
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const struct ipv6hdr *ipv6h;
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struct tcphdr *th;
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ipv6h = ipv6_hdr(skb);
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th = tcp_hdr(skb);
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th->check = 0;
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th->check = ~tcp_v6_check(0, &ipv6h->saddr, &ipv6h->daddr, 0);
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return 0;
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}
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static int r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc,
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struct sk_buff *skb, u32 len, u32 transport_offset)
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{
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u32 mss = skb_shinfo(skb)->gso_size;
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u32 opts1, opts2 = 0;
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int ret = TX_CSUM_SUCCESS;
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WARN_ON_ONCE(len > TX_LEN_MAX);
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opts1 = len | TX_FS | TX_LS;
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if (mss) {
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if (transport_offset > GTTCPHO_MAX) {
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netif_warn(tp, tx_err, tp->netdev,
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"Invalid transport offset 0x%x for TSO\n",
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transport_offset);
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ret = TX_CSUM_TSO;
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goto unavailable;
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}
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switch (get_protocol(skb)) {
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case htons(ETH_P_IP):
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opts1 |= GTSENDV4;
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break;
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case htons(ETH_P_IPV6):
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opts1 |= GTSENDV6;
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msdn_giant_send_check(skb);
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break;
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default:
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WARN_ON_ONCE(1);
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break;
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}
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opts1 |= transport_offset << GTTCPHO_SHIFT;
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opts2 |= min(mss, MSS_MAX) << MSS_SHIFT;
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} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
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u8 ip_protocol;
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u32 opts2 = 0;
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if (skb->protocol == htons(ETH_P_8021Q))
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protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
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else
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protocol = skb->protocol;
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if (transport_offset > TCPHO_MAX) {
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netif_warn(tp, tx_err, tp->netdev,
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"Invalid transport offset 0x%x\n",
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transport_offset);
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ret = TX_CSUM_NONE;
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goto unavailable;
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}
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switch (protocol) {
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switch (get_protocol(skb)) {
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case htons(ETH_P_IP):
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opts2 |= IPV4_CS;
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ip_protocol = ip_hdr(skb)->protocol;
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@ -1314,30 +1450,33 @@ r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc, struct sk_buff *skb)
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break;
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}
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if (ip_protocol == IPPROTO_TCP) {
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if (ip_protocol == IPPROTO_TCP)
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opts2 |= TCP_CS;
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opts2 |= (skb_transport_offset(skb) & 0x7fff) << 17;
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} else if (ip_protocol == IPPROTO_UDP) {
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else if (ip_protocol == IPPROTO_UDP)
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opts2 |= UDP_CS;
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} else {
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else
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WARN_ON_ONCE(1);
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}
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desc->opts2 = cpu_to_le32(opts2);
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opts2 |= transport_offset << TCPHO_SHIFT;
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}
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desc->opts2 = cpu_to_le32(opts2);
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desc->opts1 = cpu_to_le32(opts1);
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unavailable:
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return ret;
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}
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static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg)
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{
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struct sk_buff_head skb_head, *tx_queue = &tp->tx_queue;
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unsigned long flags;
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int remain, ret;
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u8 *tx_data;
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__skb_queue_head_init(&skb_head);
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spin_lock_irqsave(&tx_queue->lock, flags);
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spin_lock(&tx_queue->lock);
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skb_queue_splice_init(tx_queue, &skb_head);
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spin_unlock_irqrestore(&tx_queue->lock, flags);
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spin_unlock(&tx_queue->lock);
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tx_data = agg->head;
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agg->skb_num = agg->skb_len = 0;
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@ -1347,47 +1486,65 @@ static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg)
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struct tx_desc *tx_desc;
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struct sk_buff *skb;
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unsigned int len;
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u32 offset;
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skb = __skb_dequeue(&skb_head);
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if (!skb)
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break;
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remain -= sizeof(*tx_desc);
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len = skb->len;
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if (remain < len) {
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len = skb->len + sizeof(*tx_desc);
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|
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if (len > remain) {
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__skb_queue_head(&skb_head, skb);
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break;
|
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}
|
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|
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tx_data = tx_agg_align(tx_data);
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tx_desc = (struct tx_desc *)tx_data;
|
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offset = (u32)skb_transport_offset(skb);
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if (r8152_tx_csum(tp, tx_desc, skb, skb->len, offset)) {
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r8152_csum_workaround(tp, skb, &skb_head);
|
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continue;
|
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}
|
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|
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tx_data += sizeof(*tx_desc);
|
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|
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r8152_tx_csum(tp, tx_desc, skb);
|
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memcpy(tx_data, skb->data, len);
|
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agg->skb_num++;
|
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agg->skb_len += len;
|
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dev_kfree_skb_any(skb);
|
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len = skb->len;
|
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if (skb_copy_bits(skb, 0, tx_data, len) < 0) {
|
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struct net_device_stats *stats = &tp->netdev->stats;
|
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|
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stats->tx_dropped++;
|
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dev_kfree_skb_any(skb);
|
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tx_data -= sizeof(*tx_desc);
|
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continue;
|
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}
|
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|
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tx_data += len;
|
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agg->skb_len += len;
|
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agg->skb_num++;
|
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|
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dev_kfree_skb_any(skb);
|
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|
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remain = rx_buf_sz - (int)(tx_agg_align(tx_data) - agg->head);
|
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}
|
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|
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if (!skb_queue_empty(&skb_head)) {
|
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spin_lock_irqsave(&tx_queue->lock, flags);
|
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spin_lock(&tx_queue->lock);
|
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skb_queue_splice(&skb_head, tx_queue);
|
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spin_unlock_irqrestore(&tx_queue->lock, flags);
|
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spin_unlock(&tx_queue->lock);
|
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}
|
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|
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netif_tx_lock_bh(tp->netdev);
|
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netif_tx_lock(tp->netdev);
|
||||
|
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if (netif_queue_stopped(tp->netdev) &&
|
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skb_queue_len(&tp->tx_queue) < tp->tx_qlen)
|
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netif_wake_queue(tp->netdev);
|
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|
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netif_tx_unlock_bh(tp->netdev);
|
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netif_tx_unlock(tp->netdev);
|
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|
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ret = usb_autopm_get_interface(tp->intf);
|
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ret = usb_autopm_get_interface_async(tp->intf);
|
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if (ret < 0)
|
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goto out_tx_fill;
|
||||
|
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@ -1395,14 +1552,45 @@ static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg)
|
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agg->head, (int)(tx_data - (u8 *)agg->head),
|
||||
(usb_complete_t)write_bulk_callback, agg);
|
||||
|
||||
ret = usb_submit_urb(agg->urb, GFP_KERNEL);
|
||||
ret = usb_submit_urb(agg->urb, GFP_ATOMIC);
|
||||
if (ret < 0)
|
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usb_autopm_put_interface(tp->intf);
|
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usb_autopm_put_interface_async(tp->intf);
|
||||
|
||||
out_tx_fill:
|
||||
return ret;
|
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}
|
||||
|
||||
static u8 r8152_rx_csum(struct r8152 *tp, struct rx_desc *rx_desc)
|
||||
{
|
||||
u8 checksum = CHECKSUM_NONE;
|
||||
u32 opts2, opts3;
|
||||
|
||||
if (tp->version == RTL_VER_01)
|
||||
goto return_result;
|
||||
|
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opts2 = le32_to_cpu(rx_desc->opts2);
|
||||
opts3 = le32_to_cpu(rx_desc->opts3);
|
||||
|
||||
if (opts2 & RD_IPV4_CS) {
|
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if (opts3 & IPF)
|
||||
checksum = CHECKSUM_NONE;
|
||||
else if ((opts2 & RD_UDP_CS) && (opts3 & UDPF))
|
||||
checksum = CHECKSUM_NONE;
|
||||
else if ((opts2 & RD_TCP_CS) && (opts3 & TCPF))
|
||||
checksum = CHECKSUM_NONE;
|
||||
else
|
||||
checksum = CHECKSUM_UNNECESSARY;
|
||||
} else if (RD_IPV6_CS) {
|
||||
if ((opts2 & RD_UDP_CS) && !(opts3 & UDPF))
|
||||
checksum = CHECKSUM_UNNECESSARY;
|
||||
else if ((opts2 & RD_TCP_CS) && !(opts3 & TCPF))
|
||||
checksum = CHECKSUM_UNNECESSARY;
|
||||
}
|
||||
|
||||
return_result:
|
||||
return checksum;
|
||||
}
|
||||
|
||||
static void rx_bottom(struct r8152 *tp)
|
||||
{
|
||||
unsigned long flags;
|
||||
@ -1455,8 +1643,10 @@ static void rx_bottom(struct r8152 *tp)
|
||||
skb = netdev_alloc_skb_ip_align(netdev, pkt_len);
|
||||
if (!skb) {
|
||||
stats->rx_dropped++;
|
||||
break;
|
||||
goto find_next_rx;
|
||||
}
|
||||
|
||||
skb->ip_summed = r8152_rx_csum(tp, rx_desc);
|
||||
memcpy(skb->data, rx_data, pkt_len);
|
||||
skb_put(skb, pkt_len);
|
||||
skb->protocol = eth_type_trans(skb, netdev);
|
||||
@ -1464,6 +1654,7 @@ static void rx_bottom(struct r8152 *tp)
|
||||
stats->rx_packets++;
|
||||
stats->rx_bytes += pkt_len;
|
||||
|
||||
find_next_rx:
|
||||
rx_data = rx_agg_align(rx_data + pkt_len + CRC_SIZE);
|
||||
rx_desc = (struct rx_desc *)rx_data;
|
||||
len_used = (int)(rx_data - (u8 *)agg->head);
|
||||
@ -1535,6 +1726,7 @@ static void bottom_half(unsigned long data)
|
||||
return;
|
||||
|
||||
rx_bottom(tp);
|
||||
tx_bottom(tp);
|
||||
}
|
||||
|
||||
static
|
||||
@ -1551,16 +1743,15 @@ static void rtl_drop_queued_tx(struct r8152 *tp)
|
||||
{
|
||||
struct net_device_stats *stats = &tp->netdev->stats;
|
||||
struct sk_buff_head skb_head, *tx_queue = &tp->tx_queue;
|
||||
unsigned long flags;
|
||||
struct sk_buff *skb;
|
||||
|
||||
if (skb_queue_empty(tx_queue))
|
||||
return;
|
||||
|
||||
__skb_queue_head_init(&skb_head);
|
||||
spin_lock_irqsave(&tx_queue->lock, flags);
|
||||
spin_lock_bh(&tx_queue->lock);
|
||||
skb_queue_splice_init(tx_queue, &skb_head);
|
||||
spin_unlock_irqrestore(&tx_queue->lock, flags);
|
||||
spin_unlock_bh(&tx_queue->lock);
|
||||
|
||||
while ((skb = __skb_dequeue(&skb_head))) {
|
||||
dev_kfree_skb(skb);
|
||||
@ -1631,7 +1822,7 @@ static void _rtl8152_set_rx_mode(struct net_device *netdev)
|
||||
}
|
||||
|
||||
static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,
|
||||
struct net_device *netdev)
|
||||
struct net_device *netdev)
|
||||
{
|
||||
struct r8152 *tp = netdev_priv(netdev);
|
||||
|
||||
@ -1639,13 +1830,17 @@ static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,
|
||||
|
||||
skb_queue_tail(&tp->tx_queue, skb);
|
||||
|
||||
if (list_empty(&tp->tx_free) &&
|
||||
skb_queue_len(&tp->tx_queue) > tp->tx_qlen)
|
||||
if (!list_empty(&tp->tx_free)) {
|
||||
if (test_bit(SELECTIVE_SUSPEND, &tp->flags)) {
|
||||
set_bit(SCHEDULE_TASKLET, &tp->flags);
|
||||
schedule_delayed_work(&tp->schedule, 0);
|
||||
} else {
|
||||
usb_mark_last_busy(tp->udev);
|
||||
tasklet_schedule(&tp->tl);
|
||||
}
|
||||
} else if (skb_queue_len(&tp->tx_queue) > tp->tx_qlen)
|
||||
netif_stop_queue(netdev);
|
||||
|
||||
if (!list_empty(&tp->tx_free))
|
||||
schedule_delayed_work(&tp->schedule, 0);
|
||||
|
||||
return NETDEV_TX_OK;
|
||||
}
|
||||
|
||||
@ -2524,8 +2719,11 @@ static void rtl_work_func_t(struct work_struct *work)
|
||||
if (test_bit(RTL8152_SET_RX_MODE, &tp->flags))
|
||||
_rtl8152_set_rx_mode(tp->netdev);
|
||||
|
||||
if (tp->speed & LINK_STATUS)
|
||||
tx_bottom(tp);
|
||||
if (test_bit(SCHEDULE_TASKLET, &tp->flags) &&
|
||||
(tp->speed & LINK_STATUS)) {
|
||||
clear_bit(SCHEDULE_TASKLET, &tp->flags);
|
||||
tasklet_schedule(&tp->tl);
|
||||
}
|
||||
|
||||
if (test_bit(PHY_RESET, &tp->flags))
|
||||
rtl_phy_reset(tp);
|
||||
@ -3094,10 +3292,15 @@ static int rtl8152_probe(struct usb_interface *intf,
|
||||
netdev->netdev_ops = &rtl8152_netdev_ops;
|
||||
netdev->watchdog_timeo = RTL8152_TX_TIMEOUT;
|
||||
|
||||
netdev->features |= NETIF_F_IP_CSUM;
|
||||
netdev->hw_features = NETIF_F_IP_CSUM;
|
||||
netdev->features |= NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_SG |
|
||||
NETIF_F_TSO | NETIF_F_FRAGLIST | NETIF_F_IPV6_CSUM |
|
||||
NETIF_F_TSO6;
|
||||
netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_SG |
|
||||
NETIF_F_TSO | NETIF_F_FRAGLIST |
|
||||
NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
|
||||
|
||||
SET_ETHTOOL_OPS(netdev, &ops);
|
||||
netif_set_gso_max_size(netdev, RTL_LIMITED_TSO_SIZE);
|
||||
|
||||
tp->mii.dev = netdev;
|
||||
tp->mii.mdio_read = read_mii_word;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user