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[RFC,v1,5/7] net/ena: relax the barrier for bounce buffer

Message ID 20200313091835.58039-6-gavin.hu@arm.com (mailing list archive)
State RFC, archived
Delegated to: Ferruh Yigit
Headers show
Series relax barriers for ENA PMD and small fixes | expand


Context Check Description
ci/Intel-compilation fail Compilation issues
ci/checkpatch success coding style OK

Commit Message

Gavin Hu March 13, 2020, 9:18 a.m. UTC
To gaurantee the update observed by NIC HW, a cio barrier is sufficient,
a io barrier, which translates to dsb on aarch64, is overkill.

Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
 drivers/net/ena/base/ena_eth_com.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/net/ena/base/ena_eth_com.c b/drivers/net/ena/base/ena_eth_com.c
index d4d44226d..fce3f69eb 100644
--- a/drivers/net/ena/base/ena_eth_com.c
+++ b/drivers/net/ena/base/ena_eth_com.c
@@ -69,7 +69,7 @@  static int ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq,
 	/* Make sure everything was written into the bounce buffer before
 	 * writing the bounce buffer to the device
-	wmb();
+	rte_cio_wmb();
 	/* The line is completed. Copy it to dev */
 	ENA_MEMCPY_TO_DEVICE_64(io_sq->desc_addr.pbuf_dev_addr + dst_offset,