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net: hns3: Fix for packet buffer setting bug

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[ Upstream commit 996ff91840 ]

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: 46a3df9f97 ("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>
This commit is contained in:
Yunsheng Lin
2018-09-26 19:28:36 +01:00
committed by Greg Kroah-Hartman
parent e5014ac93d
commit 8f6bfa4c99
1 changed files with 8 additions and 6 deletions
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14
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
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@@ -1657,11 +1657,13 @@ 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
@@ -1680,13 +1682,13 @@ 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 {
@@ -1718,11 +1720,11 @@ 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;
}
}