diff options
| -rw-r--r-- | sys/dev/ixgbe/ixgbe.c | 75 |
1 files changed, 46 insertions, 29 deletions
diff --git a/sys/dev/ixgbe/ixgbe.c b/sys/dev/ixgbe/ixgbe.c index ad6c4ae..b4f11bd 100644 --- a/sys/dev/ixgbe/ixgbe.c +++ b/sys/dev/ixgbe/ixgbe.c @@ -1138,6 +1138,31 @@ ixgbe_init_locked(struct adapter *adapter) msec_delay(1); } wmb(); +#ifdef DEV_NETMAP + /* + * In netmap mode, we must preserve the buffers made + * available to userspace before the if_init() + * (this is true by default on the TX side, because + * init makes all buffers available to userspace). + * + * netmap_reset() and the device specific routines + * (e.g. ixgbe_setup_receive_rings()) map these + * buffers at the end of the NIC ring, so here we + * must set the RDT (tail) register to make sure + * they are not overwritten. + * + * In this driver the NIC ring starts at RDH = 0, + * RDT points to the last slot available for reception (?), + * so RDT = num_rx_desc - 1 means the whole ring is available. + */ + if (ifp->if_capenable & IFCAP_NETMAP) { + struct netmap_adapter *na = NA(adapter->ifp); + struct netmap_kring *kring = &na->rx_rings[i]; + int t = na->num_rx_desc - 1 - kring->nr_hwavail; + + IXGBE_WRITE_REG(hw, IXGBE_RDT(i), t); + } else +#endif /* DEV_NETMAP */ IXGBE_WRITE_REG(hw, IXGBE_RDT(i), adapter->num_rx_desc - 1); } @@ -3903,6 +3928,21 @@ skip_head: lro->ifp = adapter->ifp; } +#ifdef DEV_NETMAP1 /* XXX experimental CRC strip */ + { + struct ixgbe_hw *hw = &adapter->hw; + u32 rdrxctl; + + rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL); + rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE; + if (slot) + rdrxctl &= ~IXGBE_RDRXCTL_CRCSTRIP; + else + rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP; + rdrxctl |= IXGBE_RDRXCTL_RSCACKC; + IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl); + } +#endif /* DEV_NETMAP1 */ IXGBE_RX_UNLOCK(rxr); return (0); @@ -3982,6 +4022,12 @@ ixgbe_initialize_receive_units(struct adapter *adapter) hlreg |= IXGBE_HLREG0_JUMBOEN; else hlreg &= ~IXGBE_HLREG0_JUMBOEN; +#ifdef DEV_NETMAP1 /* XXX experimental CRCSTRIP */ + if (ifp->if_capenable & IFCAP_NETMAP) + hlreg &= ~IXGBE_HLREG0_RXCRCSTRP; + else + hlreg |= IXGBE_HLREG0_RXCRCSTRP; +#endif /* DEV_NETMAP1 */ IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg); bufsz = (adapter->rx_mbuf_sz + BSIZEPKT_ROUNDUP) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; @@ -4013,35 +4059,6 @@ ixgbe_initialize_receive_units(struct adapter *adapter) /* Setup the HW Rx Head and Tail Descriptor Pointers */ IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0); -#ifdef DEV_NETMAP - /* - * In netmap mode, we must preserve the buffers made - * available to userspace before the if_init() - * (this is true by default on the TX side, because - * init makes all buffers available to userspace). - * - * netmap_reset() and the device specific routines - * (e.g. ixgbe_setup_receive_rings()) map these - * buffers at the end of the NIC ring, so here we - * must set the RDT (tail) register to make sure - * they are not overwritten. - * - * In this driver the NIC ring starts at RDH = 0, - * RDT points to the first 'busy' slot, so RDT = 0 - * means the whole ring is available, and - * RDT = (num_rx_desc - X) means X slots are available. - * Computations are done modulo the ring size. - */ - if (ifp->if_capenable & IFCAP_NETMAP) { - struct netmap_adapter *na = NA(adapter->ifp); - struct netmap_kring *kring = &na->rx_rings[i]; - int t = na->num_rx_desc - kring->nr_hwavail; - - if (t >= na->num_rx_desc) - t -= adapter->num_rx_desc; - IXGBE_WRITE_REG(hw, IXGBE_RDT(i), t); - } else -#endif /* DEV_NETMAP */ IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0); } |
