diff options
| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2016-09-09 14:26:21 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-09-10 21:17:13 -0700 |
| commit | 8572763af48728561f8bf708b6c0ea9f4db5929e (patch) | |
| tree | 2bce5c80ae4452092c2e08a9f054296a3af65f24 /drivers/net/ethernet/freescale/fs_enet/mac-scc.c | |
| parent | Merge branch 'act_tunnel_key' (diff) | |
| download | linux-dev-8572763af48728561f8bf708b6c0ea9f4db5929e.tar.xz linux-dev-8572763af48728561f8bf708b6c0ea9f4db5929e.zip | |
net: fs_enet: merge NAPI RX and NAPI TX
Initially, a NAPI TX routine has been implemented separately from
NAPI RX, as done on the freescale/gianfar driver.
By merging NAPI RX and NAPI TX, we reduce the amount of TX completion
interrupts.
Handling of the budget in association with TX interrupts is based on
indications provided at https://wiki.linuxfoundation.org/networking/napi
We never proceed more than the complete TX ring on a single run.
At the same time, we fix an issue in the handling of fep->tx_free:
It is only when fep->tx_free goes up to MAX_SKB_FRAGS that
we need to wake up the queue. There is no need to call
netif_wake_queue() at every packet successfully transmitted.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/freescale/fs_enet/mac-scc.c | 57 |
1 files changed, 13 insertions, 44 deletions
diff --git a/drivers/net/ethernet/freescale/fs_enet/mac-scc.c b/drivers/net/ethernet/freescale/fs_enet/mac-scc.c index e8b9c33d35b4..9d52e1ec0052 100644 --- a/drivers/net/ethernet/freescale/fs_enet/mac-scc.c +++ b/drivers/net/ethernet/freescale/fs_enet/mac-scc.c @@ -115,10 +115,8 @@ static int do_pd_setup(struct fs_enet_private *fep) return 0; } -#define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB) -#define SCC_NAPI_TX_EVENT_MSK (SCCE_ENET_TXB) -#define SCC_RX_EVENT (SCCE_ENET_RXF) -#define SCC_TX_EVENT (SCCE_ENET_TXB) +#define SCC_NAPI_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB | SCCE_ENET_TXB) +#define SCC_EVENT (SCCE_ENET_RXF | SCCE_ENET_TXB) #define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE | SCCE_ENET_BSY) static int setup_data(struct net_device *dev) @@ -130,10 +128,8 @@ static int setup_data(struct net_device *dev) fep->scc.hthi = 0; fep->scc.htlo = 0; - fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK; - fep->ev_napi_tx = SCC_NAPI_TX_EVENT_MSK; - fep->ev_rx = SCC_RX_EVENT; - fep->ev_tx = SCC_TX_EVENT | SCCE_ENET_TXE; + fep->ev_napi = SCC_NAPI_EVENT_MSK; + fep->ev = SCC_EVENT | SCCE_ENET_TXE; fep->ev_err = SCC_ERR_EVENT_MSK; return 0; @@ -379,52 +375,28 @@ static void stop(struct net_device *dev) fs_cleanup_bds(dev); } -static void napi_clear_rx_event(struct net_device *dev) +static void napi_clear_event_fs(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); scc_t __iomem *sccp = fep->scc.sccp; - W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK); + W16(sccp, scc_scce, SCC_NAPI_EVENT_MSK); } -static void napi_enable_rx(struct net_device *dev) +static void napi_enable_fs(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); scc_t __iomem *sccp = fep->scc.sccp; - S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK); + S16(sccp, scc_sccm, SCC_NAPI_EVENT_MSK); } -static void napi_disable_rx(struct net_device *dev) +static void napi_disable_fs(struct net_device *dev) { struct fs_enet_private *fep = netdev_priv(dev); scc_t __iomem *sccp = fep->scc.sccp; - C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK); -} - -static void napi_clear_tx_event(struct net_device *dev) -{ - struct fs_enet_private *fep = netdev_priv(dev); - scc_t __iomem *sccp = fep->scc.sccp; - - W16(sccp, scc_scce, SCC_NAPI_TX_EVENT_MSK); -} - -static void napi_enable_tx(struct net_device *dev) -{ - struct fs_enet_private *fep = netdev_priv(dev); - scc_t __iomem *sccp = fep->scc.sccp; - - S16(sccp, scc_sccm, SCC_NAPI_TX_EVENT_MSK); -} - -static void napi_disable_tx(struct net_device *dev) -{ - struct fs_enet_private *fep = netdev_priv(dev); - scc_t __iomem *sccp = fep->scc.sccp; - - C16(sccp, scc_sccm, SCC_NAPI_TX_EVENT_MSK); + C16(sccp, scc_sccm, SCC_NAPI_EVENT_MSK); } static void rx_bd_done(struct net_device *dev) @@ -497,12 +469,9 @@ const struct fs_ops fs_scc_ops = { .set_multicast_list = set_multicast_list, .restart = restart, .stop = stop, - .napi_clear_rx_event = napi_clear_rx_event, - .napi_enable_rx = napi_enable_rx, - .napi_disable_rx = napi_disable_rx, - .napi_clear_tx_event = napi_clear_tx_event, - .napi_enable_tx = napi_enable_tx, - .napi_disable_tx = napi_disable_tx, + .napi_clear_event = napi_clear_event_fs, + .napi_enable = napi_enable_fs, + .napi_disable = napi_disable_fs, .rx_bd_done = rx_bd_done, .tx_kickstart = tx_kickstart, .get_int_events = get_int_events, |