This is a note to let you know that I've just added the patch titled
RDMA/hns: Fix insufficient extend DB for VFs.
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-hns-fix-insufficient-extend-db-for-vfs.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7169be686000b38bd598a227bcf35fcb2f731cd7
Author: Chengchang Tang <tangchengchang@xxxxxxxxxx>
Date: Wed Jul 10 21:37:04 2024 +0800
RDMA/hns: Fix insufficient extend DB for VFs.
[ Upstream commit 0b8e658f70ffd5dc7cda3872fd524d657d4796b7 ]
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: 6b63597d3540 ("RDMA/hns: Add TSQ link table support")
Signed-off-by: Chengchang Tang <tangchengchang@xxxxxxxxxx>
Signed-off-by: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240710133705.896445-8-huangjunxian6@xxxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 4accc9efa6946..3cd65bcca2240 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -2598,14 +2598,16 @@ 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);
