diff options
author | Dmitry Bezrukov <dmitry.bezrukov@aquantia.com> | 2018-11-26 09:33:16 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-11-27 15:46:06 -0800 |
commit | 4a3576d2bcc755475890e2db717cab0effb1f140 (patch) | |
tree | 8ffc98bda955ccfb5ab6651df4f722a75b9e0a49 /drivers | |
parent | df2d59a2ab6c9ceac2c4104272fce03493b8f62f (diff) |
net: usb: aqc111: Implement TX data path
Signed-off-by: Dmitry Bezrukov <dmitry.bezrukov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/usb/aqc111.c | 72 | ||||
-rw-r--r-- | drivers/net/usb/aqc111.h | 8 |
2 files changed, 80 insertions, 0 deletions
diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c index 390ed6cbc3fd..32a2de74ef3f 100644 --- a/drivers/net/usb/aqc111.c +++ b/drivers/net/usb/aqc111.c @@ -222,6 +222,9 @@ static int aqc111_set_mac_addr(struct net_device *net, void *p) static const struct net_device_ops aqc111_netdev_ops = { .ndo_open = usbnet_open, .ndo_stop = usbnet_stop, + .ndo_start_xmit = usbnet_start_xmit, + .ndo_tx_timeout = usbnet_tx_timeout, + .ndo_get_stats64 = usbnet_get_stats64, .ndo_set_mac_address = aqc111_set_mac_addr, .ndo_validate_addr = eth_validate_addr, }; @@ -290,8 +293,19 @@ static int aqc111_bind(struct usbnet *dev, struct usb_interface *intf) goto out; ether_addr_copy(dev->net->dev_addr, dev->net->perm_addr); + + /* Set TX needed headroom & tailroom */ + dev->net->needed_headroom += sizeof(u64); + dev->net->needed_tailroom += sizeof(u64); + dev->net->netdev_ops = &aqc111_netdev_ops; + if (usb_device_no_sg_constraint(dev->udev)) + dev->can_dma_sg = 1; + + dev->net->hw_features |= AQ_SUPPORT_HW_FEATURE; + dev->net->features |= AQ_SUPPORT_FEATURE; + aqc111_read_fw_version(dev, aqc111_data); aqc111_data->autoneg = AUTONEG_ENABLE; aqc111_data->advertised_speed = (usb_speed == USB_SPEED_SUPER) ? @@ -505,6 +519,12 @@ static int aqc111_reset(struct usbnet *dev) struct aqc111_data *aqc111_data = dev->driver_priv; u8 reg8 = 0; + if (usb_device_no_sg_constraint(dev->udev)) + dev->can_dma_sg = 1; + + dev->net->hw_features |= AQ_SUPPORT_HW_FEATURE; + dev->net->features |= AQ_SUPPORT_FEATURE; + /* Power up ethernet PHY */ aqc111_data->phy_cfg = AQ_PHY_POWER_EN; aqc111_write32_cmd(dev, AQ_PHY_OPS, 0, 0, @@ -558,6 +578,55 @@ static int aqc111_stop(struct usbnet *dev) return 0; } +static struct sk_buff *aqc111_tx_fixup(struct usbnet *dev, struct sk_buff *skb, + gfp_t flags) +{ + int frame_size = dev->maxpacket; + struct sk_buff *new_skb = NULL; + u64 *tx_desc_ptr = NULL; + int padding_size = 0; + int headroom = 0; + int tailroom = 0; + u64 tx_desc = 0; + + /*Length of actual data*/ + tx_desc |= skb->len & AQ_TX_DESC_LEN_MASK; + + headroom = (skb->len + sizeof(tx_desc)) % 8; + if (headroom != 0) + padding_size = 8 - headroom; + + if (((skb->len + sizeof(tx_desc) + padding_size) % frame_size) == 0) { + padding_size += 8; + tx_desc |= AQ_TX_DESC_DROP_PADD; + } + + if (!dev->can_dma_sg && (dev->net->features & NETIF_F_SG) && + skb_linearize(skb)) + return NULL; + + headroom = skb_headroom(skb); + tailroom = skb_tailroom(skb); + + if (!(headroom >= sizeof(tx_desc) && tailroom >= padding_size)) { + new_skb = skb_copy_expand(skb, sizeof(tx_desc), + padding_size, flags); + dev_kfree_skb_any(skb); + skb = new_skb; + if (!skb) + return NULL; + } + if (padding_size != 0) + skb_put_zero(skb, padding_size); + /* Copy TX header */ + tx_desc_ptr = skb_push(skb, sizeof(tx_desc)); + *tx_desc_ptr = cpu_to_le64(tx_desc); + + usbnet_set_skb_tx_stats(skb, 1, 0); + + return skb; +} + static const struct driver_info aqc111_info = { .description = "Aquantia AQtion USB to 5GbE Controller", .bind = aqc111_bind, @@ -566,6 +635,9 @@ static const struct driver_info aqc111_info = { .link_reset = aqc111_link_reset, .reset = aqc111_reset, .stop = aqc111_stop, + .flags = FLAG_ETHER | FLAG_FRAMING_AX | + FLAG_AVOID_UNLINK_URBS | FLAG_MULTI_PACKET, + .tx_fixup = aqc111_tx_fixup, }; #define AQC111_USB_ETH_DEV(vid, pid, table) \ diff --git a/drivers/net/usb/aqc111.h b/drivers/net/usb/aqc111.h index 0c8e1ee29893..c09f188b9f3d 100644 --- a/drivers/net/usb/aqc111.h +++ b/drivers/net/usb/aqc111.h @@ -18,6 +18,10 @@ #define AQ_USB_PHY_SET_TIMEOUT 10000 #define AQ_USB_SET_TIMEOUT 4000 +/* Feature. ********************************************/ +#define AQ_SUPPORT_FEATURE (NETIF_F_SG) +#define AQ_SUPPORT_HW_FEATURE (NETIF_F_SG) + /* SFR Reg. ********************************************/ #define SFR_GENERAL_STATUS 0x03 @@ -149,6 +153,10 @@ struct aqc111_data { #define AQ_INT_SPEED_1G 0x0011 #define AQ_INT_SPEED_100M 0x0013 +/* TX Descriptor */ +#define AQ_TX_DESC_LEN_MASK 0x1FFFFF +#define AQ_TX_DESC_DROP_PADD BIT(28) + static struct { unsigned char ctrl; unsigned char timer_l; |