diff options
| author |   Claudiu Manoil <claudiu.manoil@nxp.com> | 2020-07-21 10:55:21 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-07-21 15:38:30 -0700 |
| commit | 915710812ba0ff11f49aa810025f91bbad8da20a (patch) | |
| tree | 43d602cf5bc651d645e40a66d321e7a509066e17 /drivers/net/ethernet/freescale/enetc/enetc.h | |
| parent | enetc: Drop redundant ____cacheline_aligned_in_smp (diff) | |
| download | linux-dev-915710812ba0ff11f49aa810025f91bbad8da20a.tar.xz linux-dev-915710812ba0ff11f49aa810025f91bbad8da20a.zip | |
enetc: Add interrupt coalescing support
Enable programming of the interrupt coalescing registers
and allow manual configuration of the coalescing time
thresholds via ethtool. Packet thresholds have been fixed
to predetermined values as there's no point in making them
run-time configurable, also anticipating the dynamic interrupt
moderation (DIM) algorithm which uses fixed packet thresholds
as well. If the interface is up when the operation mode of
traffic interrupt events is changed by the user (i.e. switching
from default per-packet interrupts to coalesced interrupts),
the traffic needs to be paused in the process.
This patch also prepares the ground for introducing DIM on Rx.
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/freescale/enetc/enetc.h')
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h index 81e9072e10d4..4e3af7f07892 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.h +++ b/drivers/net/ethernet/freescale/enetc/enetc.h @@ -190,8 +190,10 @@ static inline bool enetc_si_is_pf(struct enetc_si *si) struct enetc_int_vector { void __iomem *rbier; void __iomem *tbier_base; + void __iomem *ricr1; unsigned long tx_rings_map; int count_tx_rings; + u32 rx_ictt; struct napi_struct napi; char name[ENETC_INT_NAME_MAX]; @@ -221,6 +223,18 @@ enum enetc_active_offloads { ENETC_F_QCI = BIT(3), }; +/* interrupt coalescing modes */ +enum enetc_ic_mode { + /* one interrupt per frame */ + ENETC_IC_NONE = 0, + /* activated when int coalescing time is set to a non-0 value */ + ENETC_IC_RX_MANUAL = BIT(0), + ENETC_IC_TX_MANUAL = BIT(1), +}; + +#define ENETC_RXIC_PKTTHR min_t(u32, 256, ENETC_RX_RING_DEFAULT_SIZE / 2) +#define ENETC_TXIC_PKTTHR min_t(u32, 128, ENETC_TX_RING_DEFAULT_SIZE / 2) + struct enetc_ndev_priv { struct net_device *ndev; struct device *dev; /* dma-mapping device */ @@ -245,6 +259,8 @@ struct enetc_ndev_priv { struct device_node *phy_node; phy_interface_t if_mode; + int ic_mode; + u32 tx_ictt; }; /* Messaging */ @@ -274,6 +290,8 @@ void enetc_free_si_resources(struct enetc_ndev_priv *priv); int enetc_open(struct net_device *ndev); int enetc_close(struct net_device *ndev); +void enetc_start(struct net_device *ndev); +void enetc_stop(struct net_device *ndev); netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); struct net_device_stats *enetc_get_stats(struct net_device *ndev); int enetc_set_features(struct net_device *ndev, |