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net: hns3: Fix for DEFAULT_DV when dev doesn't support DCB

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When ae_dev doesn't support DCB, DEFAULT_DV must be set to
a lower value, otherwise the buffer allocation process will
fail.
This patch fix it by setting it to 30K bytes.

Fixes: 46a3df9f97 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yunsheng Lin 2017-09-20 18:52:52 +08:00 committed by David S. Miller
parent 2daf4a6536
commit d221df4e0f
2 changed files with 6 additions and 1 deletions
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1
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
View file

@ -688,6 +688,7 @@ struct hclge_reset_tqp_queue {
#define HCLGE_DEFAULT_TX_BUF 0x4000 /* 16k bytes */
#define HCLGE_TOTAL_PKT_BUF 0x108000 /* 1.03125M bytes */
#define HCLGE_DEFAULT_DV 0xA000 /* 40k byte */
#define HCLGE_DEFAULT_NON_DCB_DV 0x7800 /* 30K byte */
#define HCLGE_TYPE_CRQ 0
#define HCLGE_TYPE_CSQ 1

6
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
View file

@ -1444,7 +1444,11 @@ static bool hclge_is_rx_buf_ok(struct hclge_dev *hdev, u32 rx_all)
tc_num = hclge_get_tc_num(hdev);
pfc_enable_num = hclge_get_pfc_enalbe_num(hdev);
shared_buf_min = 2 * hdev->mps + HCLGE_DEFAULT_DV;
if (hnae3_dev_dcb_supported(hdev))
shared_buf_min = 2 * hdev->mps + HCLGE_DEFAULT_DV;
else
shared_buf_min = 2 * hdev->mps + HCLGE_DEFAULT_NON_DCB_DV;
shared_buf_tc = pfc_enable_num * hdev->mps +
(tc_num - pfc_enable_num) * hdev->mps / 2 +
hdev->mps;