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mlx5_core: Simplify signature handover wqe for interleaved buffers

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No need for repetition format pattern in case the data and protection
are already interleaved in the memory domain since the pattern
already exists. A single key entry is sufficient and may save some
extra fetch ops.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg 2014-05-18 18:32:39 +03:00 committed by Roland Dreier
parent 8524867b9c
commit 5c273b1677
1 changed files with 9 additions and 15 deletions
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24
drivers/infiniband/hw/mlx5/qp.c
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@ -2131,9 +2131,13 @@ static int set_sig_data_segment(struct ib_send_wr *wr, struct mlx5_ib_qp *qp,
int ret;
int wqe_size;
if (!wr->wr.sig_handover.prot) {
if (!wr->wr.sig_handover.prot ||
(data_key == wr->wr.sig_handover.prot->lkey &&
data_va == wr->wr.sig_handover.prot->addr &&
data_len == wr->wr.sig_handover.prot->length)) {
/**
* Source domain doesn't contain signature information
* or data and protection are interleaved in memory.
* So need construct:
* ------------------
* | data_klm |
@ -2187,23 +2191,13 @@ static int set_sig_data_segment(struct ib_send_wr *wr, struct mlx5_ib_qp *qp,
data_sentry->bcount = cpu_to_be16(block_size);
data_sentry->key = cpu_to_be32(data_key);
data_sentry->va = cpu_to_be64(data_va);
data_sentry->stride = cpu_to_be16(block_size);
prot_sentry->bcount = cpu_to_be16(prot_size);
prot_sentry->key = cpu_to_be32(prot_key);
prot_sentry->va = cpu_to_be64(prot_va);
prot_sentry->stride = cpu_to_be16(prot_size);
if (prot_key == data_key && prot_va == data_va) {
/**
* The data and protection are interleaved
* in a single memory region
**/
prot_sentry->va = cpu_to_be64(data_va + block_size);
prot_sentry->stride = cpu_to_be16(block_size + prot_size);
data_sentry->stride = prot_sentry->stride;
} else {
/* The data and protection are two different buffers */
prot_sentry->va = cpu_to_be64(prot_va);
data_sentry->stride = cpu_to_be16(block_size);
prot_sentry->stride = cpu_to_be16(prot_size);
}
wqe_size = ALIGN(sizeof(*sblock_ctrl) + sizeof(*data_sentry) +
sizeof(*prot_sentry), 64);
}