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ice: move headroom initialization to ice_setup_rx_ctx

Browse source 
ice_rx_offset(), that is supposed to initialize the Rx buffer headroom,
relies on ICE_RX_FLAGS_RING_BUILD_SKB flag as well as XDP prog presence.

Currently, the callsite of mentioned function is placed incorrectly
within ice_setup_rx_ring() where Rx ring's build skb flag is not
set yet. This causes the XDP_REDIRECT to be partially broken due to
inability to create xdp_frame in the headroom space, as the headroom is
0.

Fix this by moving ice_rx_offset() to ice_setup_rx_ctx() after the flag
setting.

Fixes: f1b1f409bf ("ice: store the result of ice_rx_offset() onto ice_ring")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: Kiran Bhandare <kiranx.bhandare@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Maciej Fijalkowski 2021-03-03 16:39:27 +01:00 committed by Tony Nguyen
parent a86606268e
commit 89861c485c
2 changed files with 18 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
drivers/net/ethernet/intel/ice/ice_base.c
View file

@ -274,6 +274,22 @@ ice_setup_tx_ctx(struct ice_ring *ring, struct ice_tlan_ctx *tlan_ctx, u16 pf_q)
tlan_ctx->legacy_int = ICE_TX_LEGACY;
}
/**
* ice_rx_offset - Return expected offset into page to access data
* @rx_ring: Ring we are requesting offset of
*
* Returns the offset value for ring into the data buffer.
*/
static unsigned int ice_rx_offset(struct ice_ring *rx_ring)
{
if (ice_ring_uses_build_skb(rx_ring))
return ICE_SKB_PAD;
else if (ice_is_xdp_ena_vsi(rx_ring->vsi))
return XDP_PACKET_HEADROOM;
return 0;
}
/**
* ice_setup_rx_ctx - Configure a receive ring context
* @ring: The Rx ring to configure
@ -413,6 +429,8 @@ int ice_setup_rx_ctx(struct ice_ring *ring)
else
ice_set_ring_build_skb_ena(ring);
ring->rx_offset = ice_rx_offset(ring);
/* init queue specific tail register */
ring->tail = hw->hw_addr + QRX_TAIL(pf_q);
writel(0, ring->tail);

17
drivers/net/ethernet/intel/ice/ice_txrx.c
View file

@ -443,22 +443,6 @@ void ice_free_rx_ring(struct ice_ring *rx_ring)
}
}
/**
* ice_rx_offset - Return expected offset into page to access data
* @rx_ring: Ring we are requesting offset of
*
* Returns the offset value for ring into the data buffer.
*/
static unsigned int ice_rx_offset(struct ice_ring *rx_ring)
{
if (ice_ring_uses_build_skb(rx_ring))
return ICE_SKB_PAD;
else if (ice_is_xdp_ena_vsi(rx_ring->vsi))
return XDP_PACKET_HEADROOM;
return 0;
}
/**
* ice_setup_rx_ring - Allocate the Rx descriptors
* @rx_ring: the Rx ring to set up
@ -493,7 +477,6 @@ int ice_setup_rx_ring(struct ice_ring *rx_ring)
rx_ring->next_to_use = 0;
rx_ring->next_to_clean = 0;
rx_ring->rx_offset = ice_rx_offset(rx_ring);
if (ice_is_xdp_ena_vsi(rx_ring->vsi))
WRITE_ONCE(rx_ring->xdp_prog, rx_ring->vsi->xdp_prog);