4.18-stable review patch. If anyone has any objections, please let me know.
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From: Yunsheng Lin linyunsheng@huawei.com
[ Upstream commit 996ff91840eb6f288826e472685abde78bac20ea ]
The hardware expects a unit of 128 bytes when setting packet buffer. When calculating the packet buffer size, hclge_rx_buffer_calc does not round up the size as a unit of 128 byte, which may casue packet lost problem when stress testing.
This patch fixes it by rounding up packet size when calculating.
Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support") Signed-off-by: Yunsheng Lin linyunsheng@huawei.com Signed-off-by: Peng Li lipeng321@huawei.com Signed-off-by: Salil Mehta salil.mehta@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -1669,11 +1669,13 @@ static int hclge_tx_buffer_calc(struct h static int hclge_rx_buffer_calc(struct hclge_dev *hdev, struct hclge_pkt_buf_alloc *buf_alloc) { - u32 rx_all = hdev->pkt_buf_size; +#define HCLGE_BUF_SIZE_UNIT 128 + u32 rx_all = hdev->pkt_buf_size, aligned_mps; int no_pfc_priv_num, pfc_priv_num; struct hclge_priv_buf *priv; int i;
+ aligned_mps = round_up(hdev->mps, HCLGE_BUF_SIZE_UNIT); rx_all -= hclge_get_tx_buff_alloced(buf_alloc);
/* When DCB is not supported, rx private @@ -1692,13 +1694,13 @@ static int hclge_rx_buffer_calc(struct h if (hdev->hw_tc_map & BIT(i)) { priv->enable = 1; if (hdev->tm_info.hw_pfc_map & BIT(i)) { - priv->wl.low = hdev->mps; - priv->wl.high = priv->wl.low + hdev->mps; + priv->wl.low = aligned_mps; + priv->wl.high = priv->wl.low + aligned_mps; priv->buf_size = priv->wl.high + HCLGE_DEFAULT_DV; } else { priv->wl.low = 0; - priv->wl.high = 2 * hdev->mps; + priv->wl.high = 2 * aligned_mps; priv->buf_size = priv->wl.high; } } else { @@ -1730,11 +1732,11 @@ static int hclge_rx_buffer_calc(struct h
if (hdev->tm_info.hw_pfc_map & BIT(i)) { priv->wl.low = 128; - priv->wl.high = priv->wl.low + hdev->mps; + priv->wl.high = priv->wl.low + aligned_mps; priv->buf_size = priv->wl.high + HCLGE_DEFAULT_DV; } else { priv->wl.low = 0; - priv->wl.high = hdev->mps; + priv->wl.high = aligned_mps; priv->buf_size = priv->wl.high; } }