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net: hns3: fix the max tx size according to user manual 

Currently the max tx size supported by the hw is calculated by
using the max BD num supported by the hw. According to the hw
user manual, the max tx size is fixed value for both non-TSO and
TSO skb.

This patch updates the max tx size according to the manual.

Fixes: 8ae10cfb5089("net: hns3: support tx-scatter-gather-fraglist feature")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yunsheng Lin 2021-10-19 22:16:31 +08:00 committed by David S. Miller
parent 731797fdff
commit adfb7b4966
2 changed files with 4 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
View File

@ -1847,7 +1847,6 @@ void hns3_shinfo_pack(struct skb_shared_info *shinfo, __u32 *size)
static int hns3_skb_linearize(struct hns3_enet_ring *ring,
struct sk_buff *skb,
u8 max_non_tso_bd_num,
unsigned int bd_num)
{
/* 'bd_num == UINT_MAX' means the skb' fraglist has a
@ -1864,8 +1863,7 @@ static int hns3_skb_linearize(struct hns3_enet_ring *ring,
* will not help.
*/
if (skb->len > HNS3_MAX_TSO_SIZE ||
(!skb_is_gso(skb) && skb->len >
HNS3_MAX_NON_TSO_SIZE(max_non_tso_bd_num))) {
(!skb_is_gso(skb) && skb->len > HNS3_MAX_NON_TSO_SIZE)) {
u64_stats_update_begin(&ring->syncp);
ring->stats.hw_limitation++;
u64_stats_update_end(&ring->syncp);
@ -1900,8 +1898,7 @@ static int hns3_nic_maybe_stop_tx(struct hns3_enet_ring *ring,
goto out;
}
if (hns3_skb_linearize(ring, skb, max_non_tso_bd_num,
bd_num))
if (hns3_skb_linearize(ring, skb, bd_num))
return -ENOMEM;
bd_num = hns3_tx_bd_count(skb->len);

6
drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
View File

@ -186,11 +186,9 @@ enum hns3_nic_state {
#define HNS3_MAX_BD_SIZE 65535
#define HNS3_MAX_TSO_BD_NUM 63U
#define HNS3_MAX_TSO_SIZE \
(HNS3_MAX_BD_SIZE * HNS3_MAX_TSO_BD_NUM)
#define HNS3_MAX_TSO_SIZE 1048576U
#define HNS3_MAX_NON_TSO_SIZE 9728U
#define HNS3_MAX_NON_TSO_SIZE(max_non_tso_bd_num) \
(HNS3_MAX_BD_SIZE * (max_non_tso_bd_num))
#define HNS3_VECTOR_GL0_OFFSET 0x100
#define HNS3_VECTOR_GL1_OFFSET 0x200