diff options
| -rw-r--r-- | Documentation/networking/net_cachelines/net_device.rst | 2 | ||||
| -rw-r--r-- | Documentation/networking/netmem.rst | 3 | ||||
| -rw-r--r-- | Documentation/translations/zh_CN/networking/netmem.rst | 3 | ||||
| -rw-r--r-- | drivers/net/netkit.c | 1 | ||||
| -rw-r--r-- | include/linux/netdevice.h | 3 |
5 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/networking/net_cachelines/net_device.rst b/Documentation/networking/net_cachelines/net_device.rst index 1c19bb7705df..7b3392553fd6 100644 --- a/Documentation/networking/net_cachelines/net_device.rst +++ b/Documentation/networking/net_cachelines/net_device.rst @@ -10,7 +10,7 @@ Type Name fastpath_tx_acce =================================== =========================== =================== =================== =================================================================================== unsigned_long:32 priv_flags read_mostly __dev_queue_xmit(tx) unsigned_long:1 lltx read_mostly HARD_TX_LOCK,HARD_TX_TRYLOCK,HARD_TX_UNLOCK(tx) -unsigned long:1 netmem_tx:1; read_mostly +unsigned_long:2 netmem_tx:2; read_mostly char name[16] struct netdev_name_node* name_node struct dev_ifalias* ifalias diff --git a/Documentation/networking/netmem.rst b/Documentation/networking/netmem.rst index 5ccadba4f373..217869d1108d 100644 --- a/Documentation/networking/netmem.rst +++ b/Documentation/networking/netmem.rst @@ -99,3 +99,6 @@ Driver TX Requirements appropriate mode: - `NETMEM_TX_DMA`: for physical devices that perform DMA. + + - `NETMEM_TX_NO_DMA`: for virtual or passthrough devices that do + not DMA, but still support handling of netmem-backed skbs. diff --git a/Documentation/translations/zh_CN/networking/netmem.rst b/Documentation/translations/zh_CN/networking/netmem.rst index 9c84423b7528..320f3eacf51b 100644 --- a/Documentation/translations/zh_CN/networking/netmem.rst +++ b/Documentation/translations/zh_CN/networking/netmem.rst @@ -92,3 +92,6 @@ dma-mapping API 去处理。 2. 驱动程序应将 `netdev->netmem_tx` 设置为适当的模式： - `NETMEM_TX_DMA`：适用于执行 DMA 的物理设备。 + + - `NETMEM_TX_NO_DMA`：适用于不执行 DMA 的虚拟或透传设备，但仍支持 + 处理 netmem 支持的 skb。 diff --git a/drivers/net/netkit.c b/drivers/net/netkit.c index 5e2eecc3165d..0ad6a806d7d5 100644 --- a/drivers/net/netkit.c +++ b/drivers/net/netkit.c @@ -466,6 +466,7 @@ static void netkit_setup(struct net_device *dev) dev->priv_flags |= IFF_NO_QUEUE; dev->priv_flags |= IFF_DISABLE_NETPOLL; dev->lltx = true; + dev->netmem_tx = NETMEM_TX_NO_DMA; dev->netdev_ops = &netkit_netdev_ops; dev->ethtool_ops = &netkit_ethtool_ops; diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index b7a4503f7cdb..bf3dd9b2c1a7 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1797,6 +1797,7 @@ enum netdev_stat_type { enum netmem_tx_mode { NETMEM_TX_NONE, /* no netmem TX support */ NETMEM_TX_DMA, /* DMA-capable netmem TX (real HW) */ + NETMEM_TX_NO_DMA, /* no DMA, e.g. passthrough for virtual devs */ }; enum netdev_reg_state { @@ -2143,7 +2144,7 @@ struct net_device { struct_group(priv_flags_fast, unsigned long priv_flags:32; unsigned long lltx:1; - unsigned long netmem_tx:1; + unsigned long netmem_tx:2; ); const struct net_device_ops *netdev_ops; const struct header_ops *header_ops; |