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IB: split struct ib_send_wr

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This patch split up struct ib_send_wr so that all non-trivial verbs
use their own structure which embedds struct ib_send_wr.  This dramaticly
shrinks the size of a WR for most common operations:

sizeof(struct ib_send_wr) (old):	96

sizeof(struct ib_send_wr):		48
sizeof(struct ib_rdma_wr):		64
sizeof(struct ib_atomic_wr):		96
sizeof(struct ib_ud_wr):		88
sizeof(struct ib_fast_reg_wr):		88
sizeof(struct ib_bind_mw_wr):		96
sizeof(struct ib_sig_handover_wr):	80

And with Sagi's pending MR rework the fast registration WR will also be
down to a reasonable size:

sizeof(struct ib_fastreg_wr):		64

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> [srp, srpt]
Reviewed-by: Chuck Lever <chuck.lever@oracle.com> [sunrpc]
Tested-by: Haggai Eran <haggaie@mellanox.com>
Tested-by: Sagi Grimberg <sagig@mellanox.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
This commit is contained in:
Christoph Hellwig
2015-10-08 09:16:33 +01:00
parent b8cab5dab1
commit e622f2f4ad
63 changed files with 1147 additions and 981 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
net/sunrpc/xprtrdma/frwr_ops.c
View File

@@ -312,7 +312,8 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
struct rpcrdma_mw *mw;
struct rpcrdma_frmr *frmr;
struct ib_mr *mr;
struct ib_send_wr fastreg_wr, *bad_wr;
struct ib_fast_reg_wr fastreg_wr;
struct ib_send_wr *bad_wr;
u8 key;
int len, pageoff;
int i, rc;
@@ -358,23 +359,23 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg,
__func__, mw, i, len);
memset(&fastreg_wr, 0, sizeof(fastreg_wr));
fastreg_wr.wr_id = (unsigned long)(void *)mw;
fastreg_wr.opcode = IB_WR_FAST_REG_MR;
fastreg_wr.wr.fast_reg.iova_start = seg1->mr_dma + pageoff;
fastreg_wr.wr.fast_reg.page_list = frmr->fr_pgl;
fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT;
fastreg_wr.wr.fast_reg.page_list_len = page_no;
fastreg_wr.wr.fast_reg.length = len;
fastreg_wr.wr.fast_reg.access_flags = writing ?
fastreg_wr.wr.wr_id = (unsigned long)(void *)mw;
fastreg_wr.wr.opcode = IB_WR_FAST_REG_MR;
fastreg_wr.iova_start = seg1->mr_dma + pageoff;
fastreg_wr.page_list = frmr->fr_pgl;
fastreg_wr.page_shift = PAGE_SHIFT;
fastreg_wr.page_list_len = page_no;
fastreg_wr.length = len;
fastreg_wr.access_flags = writing ?
IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE :
IB_ACCESS_REMOTE_READ;
mr = frmr->fr_mr;
key = (u8)(mr->rkey & 0x000000FF);
ib_update_fast_reg_key(mr, ++key);
fastreg_wr.wr.fast_reg.rkey = mr->rkey;
fastreg_wr.rkey = mr->rkey;
DECR_CQCOUNT(&r_xprt->rx_ep);
rc = ib_post_send(ia->ri_id->qp, &fastreg_wr, &bad_wr);
rc = ib_post_send(ia->ri_id->qp, &fastreg_wr.wr, &bad_wr);
if (rc)
goto out_senderr;