diff options
| author |   Potnuri Bharat Teja <bharat@chelsio.com> | 2018-08-02 11:33:04 +0530 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-08-02 20:16:02 -0600 |
| commit | 94245f4ad9e10c161affaa4763136d29fbe91cb9 (patch) | |
| tree | 7625512a78191c17c27a1fcff74fd7c1771dbf06 /drivers/infiniband/hw/cxgb4/t4.h | |
| parent | iw_cxgb4: RDMA write with immediate support (diff) | |
| download | linux-dev-94245f4ad9e10c161affaa4763136d29fbe91cb9.tar.xz linux-dev-94245f4ad9e10c161affaa4763136d29fbe91cb9.zip | |
iw_cxgb4: Support FW write completion WR
To optimize NVME-oF READ IOPs, use a specialized WQE that combines
the RDMA WRITE and SEND_INV WR chain submitted by the NVME-oF target
driver.
This reduces uP overhead per NVME-oF IO, and results in over 10%
improvement in NVME-oF 4K READ IOPs.
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/t4.h')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/t4.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/cxgb4/t4.h b/drivers/infiniband/hw/cxgb4/t4.h index 0fb3e55f37c1..e42021fd6fd6 100644 --- a/drivers/infiniband/hw/cxgb4/t4.h +++ b/drivers/infiniband/hw/cxgb4/t4.h @@ -91,6 +91,9 @@ static inline int t4_max_fr_depth(int use_dsgl) #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS) #define T4_MAX_RECV_SGE 4 +#define T4_WRITE_CMPL_MAX_SGL 4 +#define T4_WRITE_CMPL_MAX_CQE 16 + union t4_wr { struct fw_ri_res_wr res; struct fw_ri_wr ri; @@ -101,6 +104,7 @@ union t4_wr { struct fw_ri_fr_nsmr_wr fr; struct fw_ri_fr_nsmr_tpte_wr fr_tpte; struct fw_ri_inv_lstag_wr inv; + struct fw_ri_rdma_write_cmpl_wr write_cmpl; struct t4_status_page status; __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS]; }; @@ -851,7 +855,7 @@ static inline void t4_set_cq_in_error(struct t4_cq *cq) struct t4_dev_status_page { u8 db_off; - u8 pad1; + u8 write_cmpl_supported; u16 pad2; u32 pad3; u64 qp_start; |