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IB/mlx5: Pick the right GSI transmission QP for sending

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Pick the QP to use according to the wr.ud.pkey_index field in the work
request. If the QP doesn't exist, it means the P_Key is zero and the packet
would have been dropped, so just generate a completion and move on.

Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Haggai Eran 2016-02-29 15:45:10 +02:00 committed by Doug Ledford
parent ea6dc20362
commit 83cae2aff5
1 changed files with 47 additions and 1 deletions
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48
drivers/infiniband/hw/mlx5/gsi.c
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@ -443,10 +443,47 @@ static int mlx5_ib_add_outstanding_wr(struct mlx5_ib_gsi_qp *gsi,
return 0;
}
/* Call with gsi->lock locked */
static int mlx5_ib_gsi_silent_drop(struct mlx5_ib_gsi_qp *gsi,
struct ib_ud_wr *wr)
{
struct ib_wc wc = {
{ .wr_id = wr->wr.wr_id },
.status = IB_WC_SUCCESS,
.opcode = IB_WC_SEND,
.qp = &gsi->ibqp,
};
int ret;
ret = mlx5_ib_add_outstanding_wr(gsi, wr, &wc);
if (ret)
return ret;
generate_completions(gsi);
return 0;
}
/* Call with gsi->lock locked */
static struct ib_qp *get_tx_qp(struct mlx5_ib_gsi_qp *gsi, struct ib_ud_wr *wr)
{
struct mlx5_ib_dev *dev = to_mdev(gsi->rx_qp->device);
int qp_index = wr->pkey_index;
if (!mlx5_ib_deth_sqpn_cap(dev))
return gsi->rx_qp;
if (qp_index >= gsi->num_qps)
return NULL;
return gsi->tx_qps[qp_index];
}
int mlx5_ib_gsi_post_send(struct ib_qp *qp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
{
struct mlx5_ib_gsi_qp *gsi = gsi_qp(qp);
struct ib_qp *tx_qp;
unsigned long flags;
int ret;
@ -456,11 +493,20 @@ int mlx5_ib_gsi_post_send(struct ib_qp *qp, struct ib_send_wr *wr,
cur_wr.wr.next = NULL;
spin_lock_irqsave(&gsi->lock, flags);
tx_qp = get_tx_qp(gsi, &cur_wr);
if (!tx_qp) {
ret = mlx5_ib_gsi_silent_drop(gsi, &cur_wr);
if (ret)
goto err;
spin_unlock_irqrestore(&gsi->lock, flags);
continue;
}
ret = mlx5_ib_add_outstanding_wr(gsi, &cur_wr, NULL);
if (ret)
goto err;
ret = ib_post_send(gsi->rx_qp, &cur_wr.wr, bad_wr);
ret = ib_post_send(tx_qp, &cur_wr.wr, bad_wr);
if (ret) {
/* Undo the effect of adding the outstanding wr */
gsi->outstanding_pi = (gsi->outstanding_pi - 1) %