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: 6b63597d3540 ("RDMA/hns: Add TSQ link table support")
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://lore.kernel.org/r/20240710133705.896445-8-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index cbbc142afc1be5e123edc600124df935484bbfc2..aecd137c1e6052a07ebf7f9b640afded6a396548 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -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);