From: Andrew Rybchenko <arybchenko@solarflare.com>
Date: Fri, 20 Jan 2017 13:53:51 +0000 (+0000)
Subject: net/sfc: use eal I/O device memory barriers API
X-Git-Tag: spdx-start~4615
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=7a7cfb7a75d28ed6809d68ee79f91d768aa7df6b

net/sfc: use eal I/O device memory barriers API

The previous version relied on the fact that DMA sync for device and
PIO write barrier in pair. Now each does its job.

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---

diff --git a/drivers/net/sfc/efsys.h b/drivers/net/sfc/efsys.h
index a024b6c419..60829be184 100644
--- a/drivers/net/sfc/efsys.h
+++ b/drivers/net/sfc/efsys.h
@@ -612,7 +612,7 @@ typedef struct efsys_bar_s {
 /* BARRIERS */
 
 #define EFSYS_MEM_READ_BARRIER()	rte_rmb()
-#define EFSYS_PIO_WRITE_BARRIER()	rte_wmb()
+#define EFSYS_PIO_WRITE_BARRIER()	rte_io_wmb()
 
 /* DMA SYNC */
 
@@ -623,7 +623,9 @@ typedef struct efsys_bar_s {
  */
 
 #define EFSYS_DMA_SYNC_FOR_KERNEL(_esmp, _offset, _size)	((void)0)
-#define EFSYS_DMA_SYNC_FOR_DEVICE(_esmp, _offset, _size)	((void)0)
+
+/* Just avoid store and compiler (impliciltly) reordering */
+#define EFSYS_DMA_SYNC_FOR_DEVICE(_esmp, _offset, _size)	rte_wmb()
 
 /* TIMESTAMP */