Commit 0b8e658f authored by Chengchang Tang's avatar Chengchang Tang Committed by Leon Romanovsky
Browse files

RDMA/hns: Fix insufficient extend DB for VFs. 



VFs and its PF will share the memory of the extend DB. Currently,
the number of extend DB allocated by driver is only enough for PF.
This leads to a probability of DB loss and some other problems in
scenarios where both PF and VFs use a large number of QPs.

Fixes: 6b63597d ("RDMA/hns: Add TSQ link table support")
Signed-off-by: default avatarChengchang Tang <tangchengchang@huawei.com>
Signed-off-by: default avatarJunxian Huang <huangjunxian6@hisilicon.com>
Link: https://lore.kernel.org/r/20240710133705.896445-8-huangjunxian6@hisilicon.com


Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
parent 36397b90

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

+4 −2
Original line number Diff line number Diff line
@@ -2463,14 +2463,16 @@ static int set_llm_cfg_to_hw(struct hns_roce_dev *hr_dev, 
static struct hns_roce_link_table *

alloc_link_table_buf(struct hns_roce_dev *hr_dev)

{

	u16 total_sl = hr_dev->caps.sl_num * hr_dev->func_num;

	struct hns_roce_v2_priv *priv = hr_dev->priv;

	struct hns_roce_link_table *link_tbl;

	u32 pg_shift, size, min_size;



	link_tbl = &priv->ext_llm;

	pg_shift = hr_dev->caps.llm_buf_pg_sz + PAGE_SHIFT;

	size = hr_dev->caps.num_qps * HNS_ROCE_V2_EXT_LLM_ENTRY_SZ;

	min_size = HNS_ROCE_EXT_LLM_MIN_PAGES(hr_dev->caps.sl_num) << pg_shift;

	size = hr_dev->caps.num_qps * hr_dev->func_num *

	       HNS_ROCE_V2_EXT_LLM_ENTRY_SZ;

	min_size = HNS_ROCE_EXT_LLM_MIN_PAGES(total_sl) << pg_shift;



	/* Alloc data table */

	size = max(size, min_size);