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| author |   Taehee Yoo <ap420073@gmail.com> | 2022-04-17 10:12:45 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-04-20 10:42:57 +0100 |
| commit | 0d14657f40830243266f972766f1e4d00436e648 (patch) | |
| tree | fa3bf90b0daeb22ff4eb355eefa7116b5c1ee398 /drivers/net/ethernet/aquantia/atlantic/hw_atl | |
| parent | Merge branch 'dsa-cross-chip-notifier-cleanup' (diff) | |
| download | linux-dev-0d14657f40830243266f972766f1e4d00436e648.tar.xz linux-dev-0d14657f40830243266f972766f1e4d00436e648.zip | |
net: atlantic: Implement xdp control plane
aq_xdp() is a xdp setup callback function for Atlantic driver.
When XDP is attached or detached, the device will be restarted because
it uses different headroom, tailroom, and page order value.
If XDP enabled, it switches default page order value from 0 to 2.
Because the default maximum frame size is still 2K and it needs
additional area for headroom and tailroom.
The total size(headroom + frame size + tailroom) is 2624.
So, 1472Bytes will be always wasted for every frame.
But when order-2 is used, these pages can be used 6 times
with flip strategy.
It means only about 106Bytes per frame will be wasted.
Also, It supports xdp fragment feature.
MTU can be 16K if xdp prog supports xdp fragment.
If not, MTU can not exceed 2K - ETH_HLEN - ETH_FCS.
And a static key is added and It will be used to call the xdp_clean
handler in ->poll(). data plane implementation will be contained
the followed patch.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/hw_atl')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c | 6 | ||||
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c | 10 |
2 files changed, 8 insertions, 8 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c index 4625ccb79499..9dfd68f0fda9 100644 --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c @@ -531,7 +531,7 @@ static int hw_atl_a0_hw_ring_rx_init(struct aq_hw_s *self, hw_atl_rdm_rx_desc_len_set(self, aq_ring->size / 8U, aq_ring->idx); hw_atl_rdm_rx_desc_data_buff_size_set(self, - AQ_CFG_RX_FRAME_MAX / 1024U, + aq_ring->frame_max / 1024U, aq_ring->idx); hw_atl_rdm_rx_desc_head_buff_size_set(self, 0U, aq_ring->idx); @@ -706,9 +706,9 @@ static int hw_atl_a0_hw_ring_rx_receive(struct aq_hw_s *self, if (HW_ATL_A0_RXD_WB_STAT2_EOP & rxd_wb->status) { buff->len = rxd_wb->pkt_len % - AQ_CFG_RX_FRAME_MAX; + ring->frame_max; buff->len = buff->len ? - buff->len : AQ_CFG_RX_FRAME_MAX; + buff->len : ring->frame_max; buff->next = 0U; buff->is_eop = 1U; } else { diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c index d875ce3ec759..878a53abec33 100644 --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c @@ -766,7 +766,7 @@ int hw_atl_b0_hw_ring_rx_init(struct aq_hw_s *self, struct aq_ring_s *aq_ring, hw_atl_rdm_rx_desc_len_set(self, aq_ring->size / 8U, aq_ring->idx); hw_atl_rdm_rx_desc_data_buff_size_set(self, - AQ_CFG_RX_FRAME_MAX / 1024U, + aq_ring->frame_max / 1024U, aq_ring->idx); hw_atl_rdm_rx_desc_head_buff_size_set(self, 0U, aq_ring->idx); @@ -969,15 +969,15 @@ int hw_atl_b0_hw_ring_rx_receive(struct aq_hw_s *self, struct aq_ring_s *ring) rxd_wb->status); if (HW_ATL_B0_RXD_WB_STAT2_EOP & rxd_wb->status) { buff->len = rxd_wb->pkt_len % - AQ_CFG_RX_FRAME_MAX; + ring->frame_max; buff->len = buff->len ? - buff->len : AQ_CFG_RX_FRAME_MAX; + buff->len : ring->frame_max; buff->next = 0U; buff->is_eop = 1U; } else { buff->len = - rxd_wb->pkt_len > AQ_CFG_RX_FRAME_MAX ? - AQ_CFG_RX_FRAME_MAX : rxd_wb->pkt_len; + rxd_wb->pkt_len > ring->frame_max ? + ring->frame_max : rxd_wb->pkt_len; if (buff->is_lro) { /* LRO */ |