diff options
| author | Lang Cheng <chenglang@huawei.com> | 2021-01-30 11:57:59 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-02-09 02:37:33 +0300 |
| commit | 9dd052474a2645b2a6171d19ad17b05b180d446d (patch) | |
| tree | 420ded46006a3b9c38e46d219a7187b73fa58e19 /drivers/infiniband/hw/hns/hns_roce_device.h | |
| parent | 899aba891cab1555c9ca16a558769efb177baf44 (diff) | |
| download | linux-9dd052474a2645b2a6171d19ad17b05b180d446d.tar.xz | |
RDMA/hns: Allocate one more recv SGE for HIP08
The RQ/SRQ of HIP08 needs one special sge to stop receive reliably. So the
driver needs to allocate at least one SGE when creating RQ/SRQ and ensure
that at least one SGE is filled with the special value during post_recv.
Besides, the kernel driver should only do this for kernel ULP. For
userspace ULP, the userspace driver will allocate the reserved SGE in
buffer, and the kernel driver just needs to pin the corresponding size of
memory based on the userspace driver's requirements.
Link: https://lore.kernel.org/r/1611997090-48820-2-git-send-email-liweihang@huawei.com
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/hns/hns_roce_device.h')
| -rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_device.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h index f62851faf9cc..72961e4edbf2 100644 --- a/drivers/infiniband/hw/hns/hns_roce_device.h +++ b/drivers/infiniband/hw/hns/hns_roce_device.h @@ -65,6 +65,8 @@ #define HNS_ROCE_CQE_WCMD_EMPTY_BIT 0x2 #define HNS_ROCE_MIN_CQE_CNT 16 +#define HNS_ROCE_RESERVED_SGE 1 + #define HNS_ROCE_MAX_IRQ_NUM 128 #define HNS_ROCE_SGE_IN_WQE 2 @@ -395,6 +397,7 @@ struct hns_roce_wq { spinlock_t lock; u32 wqe_cnt; /* WQE num */ u32 max_gs; + u32 rsv_sge; int offset; int wqe_shift; /* WQE size */ u32 head; @@ -498,6 +501,7 @@ struct hns_roce_srq { unsigned long srqn; u32 wqe_cnt; int max_gs; + u32 rsv_sge; int wqe_shift; void __iomem *db_reg_l; |