[dpdk-dev] [PATCH v4 21/29] net/enic: use eal I/O device memory read/write API

[Jerin Jacob]

From: Santosh Shukla <santosh.shukla at caviumnetworks.com>

Replace the raw I/O device memory read/write access with eal
abstraction for I/O device memory read/write access to fix portability
issues across different architectures.

CC: John Daley <johndale at cisco.com>
CC: Nelson Escobar <neescoba at cisco.com>
Signed-off-by: Santosh Shukla <santosh.shukla at caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
---
 drivers/net/enic/enic_compat.h | 27 +++++++++++++++++++--------
 drivers/net/enic/enic_rxtx.c   |  9 +++++----
 2 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/drivers/net/enic/enic_compat.h b/drivers/net/enic/enic_compat.h
index 5dbd983..fc58bb4 100644
--- a/drivers/net/enic/enic_compat.h
+++ b/drivers/net/enic/enic_compat.h
@@ -41,6 +41,7 @@
 #include <rte_atomic.h>
 #include <rte_malloc.h>
 #include <rte_log.h>
+#include <rte_io.h>
 
 #define ENIC_PAGE_ALIGN 4096UL
 #define ENIC_ALIGN      ENIC_PAGE_ALIGN
@@ -95,42 +96,52 @@ typedef         unsigned long long  dma_addr_t;
 
 static inline uint32_t ioread32(volatile void *addr)
 {
-	return *(volatile uint32_t *)addr;
+	return rte_read32(addr);
 }
 
 static inline uint16_t ioread16(volatile void *addr)
 {
-	return *(volatile uint16_t *)addr;
+	return rte_read16(addr);
 }
 
 static inline uint8_t ioread8(volatile void *addr)
 {
-	return *(volatile uint8_t *)addr;
+	return rte_read8(addr);
 }
 
 static inline void iowrite32(uint32_t val, volatile void *addr)
 {
-	*(volatile uint32_t *)addr = val;
+	rte_write32(val, addr);
+}
+
+static inline void iowrite32_relaxed(uint32_t val, volatile void *addr)
+{
+	rte_write32_relaxed(val, addr);
 }
 
 static inline void iowrite16(uint16_t val, volatile void *addr)
 {
-	*(volatile uint16_t *)addr = val;
+	rte_write16(val, addr);
 }
 
 static inline void iowrite8(uint8_t val, volatile void *addr)
 {
-	*(volatile uint8_t *)addr = val;
+	rte_write8(val, addr);
 }
 
 static inline unsigned int readl(volatile void __iomem *addr)
 {
-	return *(volatile unsigned int *)addr;
+	return rte_read32(addr);
+}
+
+static inline unsigned int readl_relaxed(volatile void __iomem *addr)
+{
+	return rte_read32_relaxed(addr);
 }
 
 static inline void writel(unsigned int val, volatile void __iomem *addr)
 {
-	*(volatile unsigned int *)addr = val;
+	rte_write32(val, addr);
 }
 
 #define min_t(type, x, y) ({                    \
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index f762a26..382d1ab 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -380,10 +380,11 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 
 		rte_mb();
 		if (data_rq->in_use)
-			iowrite32(data_rq->posted_index,
-				  &data_rq->ctrl->posted_index);
+			iowrite32_relaxed(data_rq->posted_index,
+					  &data_rq->ctrl->posted_index);
 		rte_compiler_barrier();
-		iowrite32(sop_rq->posted_index, &sop_rq->ctrl->posted_index);
+		iowrite32_relaxed(sop_rq->posted_index,
+				  &sop_rq->ctrl->posted_index);
 	}
 
 
@@ -550,7 +551,7 @@ uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 	}
  post:
 	rte_wmb();
-	iowrite32(head_idx, &wq->ctrl->posted_index);
+	iowrite32_relaxed(head_idx, &wq->ctrl->posted_index);
  done:
 	wq->ring.desc_avail = wq_desc_avail;
 	wq->head_idx = head_idx;
-- 
2.5.5