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Code Issues Releases Activity

Make sure the mlx4en RX DMA ring gets stamped with software ownership

Browse Source 
in order to prevent the flow of QP to error in the firmware once
UPDATE_QP is called.

MFC after:	3 days
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2017-07-10 19:26:50 +00:00
parent 3185adf0fd
commit 7bb7b27fb1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=320876
1 changed files with 7 additions and 1 deletions
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8
sys/dev/mlx4/mlx4_en/mlx4_en_rx.c
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@ -394,8 +394,14 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv)
ring->rx_mb_size = priv->rx_mb_size;
ring->stride = stride;
if (ring->stride <= TXBB_SIZE)
if (ring->stride <= TXBB_SIZE) {
/* Stamp first unused send wqe */
__be32 *ptr = (__be32 *)ring->buf;
__be32 stamp = cpu_to_be32(1 << STAMP_SHIFT);
*ptr = stamp;
/* Move pointer to start of rx section */
ring->buf += TXBB_SIZE;
}
ring->log_stride = ffs(ring->stride) - 1;
ring->buf_size = ring->size * ring->stride;