| Message ID | 20211029100537.27299-1-liangwenpeng@huawei.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Jason Gunthorpe |
| Headers | show |
| Series | [for-rc] RDMA/hns: Modify the value of MAX_LP_MSG_LEN to meet hardware compatibility | expand |
On Fri, Oct 29, 2021 at 06:05:37PM +0800, Wenpeng Liang wrote: > From: Yixing Liu <liuyixing1@huawei.com> > > The upper limit of MAX_LP_MSG_LEN on HIP08 is 64K, and the upper limit on > HIP09 is 16K. Regardless of whether it is HIP08 or HIP09, only 16K will be > used. In order to ensure compatibility, it is unified to 16K. > > Setting MAX_LP_MSG_LEN to 16K will not cause the performance loss of HIP08. > > Fixes: fbed9d2be292 ("RDMA/hns: Fix configuration of ack_req_freq in QPC") > Signed-off-by: Yixing Liu <liuyixing1@huawei.com> > Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com> > --- > drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) Applied to for-rc, thanks Jason
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index d5f3faa1627a..3453b15cb391 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -4399,8 +4399,8 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp, mtu = ib_mtu_enum_to_int(ib_mtu); if (WARN_ON(mtu <= 0)) return -EINVAL; -#define MAX_LP_MSG_LEN 65536 - /* MTU * (2 ^ LP_PKTN_INI) shouldn't be bigger than 64KB */ +#define MAX_LP_MSG_LEN 16384 + /* MTU * (2 ^ LP_PKTN_INI) shouldn't be bigger than 16KB */ lp_pktn_ini = ilog2(MAX_LP_MSG_LEN / mtu); if (WARN_ON(lp_pktn_ini >= 0xF)) return -EINVAL;