Author: hselasky
Date: Mon Mar 26 21:04:47 2018
New Revision: 331590
URL: https://svnweb.freebsd.org/changeset/base/331590
Log:
MFC r330659:
Avoid more LFENCE/SFENCe on x86 in mlx5en(4),
by using the FreeBSD native fences.
Submitted by: kib@
Sponsored by: Mellanox Technologies
Modified:
stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c
stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c
==============================================================================
--- stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Mar 26 21:03:33
2018 (r331589)
+++ stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Mon Mar 26 21:04:47
2018 (r331590)
@@ -1256,7 +1256,7 @@ mlx5e_sq_send_nops_locked(struct mlx5e_sq *sq, int can
}
/* send a single NOP */
mlx5e_send_nop(sq, 1);
- wmb();
+ atomic_thread_fence_rel();
}
done:
/* Check if we need to write the doorbell */
Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c
==============================================================================
--- stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Mon Mar 26 21:03:33 2018
(r331589)
+++ stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_tx.c Mon Mar 26 21:04:47 2018
(r331590)
@@ -429,7 +429,7 @@ mlx5e_poll_tx_cq(struct mlx5e_sq *sq, int budget)
mlx5_cqwq_update_db_record(&sq->cq.wq);
/* Ensure cq space is freed before enabling more cqes */
- wmb();
+ atomic_thread_fence_rel();
sq->cc = sqcc;
Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c
==============================================================================
--- stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c Mon Mar 26 21:03:33
2018 (r331589)
+++ stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_txrx.c Mon Mar 26 21:04:47
2018 (r331590)
@@ -38,7 +38,7 @@ mlx5e_get_cqe(struct mlx5e_cq *cq)
return (NULL);
/* ensure cqe content is read after cqe ownership bit */
- rmb();
+ atomic_thread_fence_acq();
return (cqe);
}
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