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Miller" , Sasha Levin Subject: [PATCH AUTOSEL 4.18 039/126] net: hns3: Fix for packet buffer setting bug Date: Wed, 31 Oct 2018 19:06:27 -0400 Message-Id: <20181031230754.29029-39-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181031230754.29029-1-sashal@kernel.org> References: <20181031230754.29029-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yunsheng Lin [ 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 Signed-off-by: Peng Li Signed-off-by: Salil Mehta Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index 13f43b74fd6d..8179ecb089b7 100644 --- 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 hclge_dev *hdev, 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 hclge_dev *hdev, 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 hclge_dev *hdev, 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; } } -- 2.17.1