[PATCH v2 1/7] net/vmxnet3: prepare for version 3 changes

[Shrikrishna Khare <skhare@vmware.com>]

Cleanup some code in preparation of vmxnet3 version 3 changes.

Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Acked-by: Yong Wang <yongwang@vmware.com>
Acked-by: Jin Heo <heoj@vmware.com>
---
 drivers/net/vmxnet3/vmxnet3_ethdev.c | 17 +++++++++++++----
 drivers/net/vmxnet3/vmxnet3_ethdev.h |  9 +++++++++
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index b7b5377..09f2085 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -265,13 +265,22 @@ eth_vmxnet3_dev_init(struct rte_eth_dev *eth_dev)
 	/* Check h/w version compatibility with driver. */
 	ver = VMXNET3_READ_BAR1_REG(hw, VMXNET3_REG_VRRS);
 	PMD_INIT_LOG(DEBUG, "Hardware version : %d", ver);
-	if (ver & 0x1)
-		VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_VRRS, 1);
-	else {
-		PMD_INIT_LOG(ERR, "Incompatible h/w version, should be 0x1");
+
+	if (ver & (1 << VMXNET3_REV_2)) {
+		VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_VRRS,
+				       1 << VMXNET3_REV_2);
+		hw->version = VMXNET3_REV_2 + 1;
+	} else if (ver & (1 << VMXNET3_REV_1)) {
+		VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_VRRS,
+				       1 << VMXNET3_REV_1);
+		hw->version = VMXNET3_REV_1 + 1;
+	} else {
+		PMD_INIT_LOG(ERR, "Incompatible hardware version: %d", ver);
 		return -EIO;
 	}
 
+	PMD_INIT_LOG(DEBUG, "Using device version %d\n", hw->version);
+
 	/* Check UPT version compatibility with driver. */
 	ver = VMXNET3_READ_BAR1_REG(hw, VMXNET3_REG_UVRS);
 	PMD_INIT_LOG(DEBUG, "UPT hardware version : %d", ver);
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.h b/drivers/net/vmxnet3/vmxnet3_ethdev.h
index 348c840..3cc8979 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.h
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.h
@@ -101,6 +101,8 @@ struct vmxnet3_hw {
 	uint8_t num_rx_queues;
 	uint8_t bufs_per_pkt;
 
+	uint8_t	version;
+
 	Vmxnet3_TxQueueDesc   *tqd_start;	/* start address of all tx queue desc */
 	Vmxnet3_RxQueueDesc   *rqd_start;	/* start address of all rx queue desc */
 
@@ -117,6 +119,13 @@ struct vmxnet3_hw {
 #define VMXNET3_VFT_TABLE_SIZE     (VMXNET3_VFT_SIZE * sizeof(uint32_t))
 };
 
+#define VMXNET3_REV_3		2		/* Vmxnet3 Rev. 3 */
+#define VMXNET3_REV_2		1		/* Vmxnet3 Rev. 2 */
+#define VMXNET3_REV_1		0		/* Vmxnet3 Rev. 1 */
+
+#define VMXNET3_VERSION_GE_3(hw) ((hw)->version >= VMXNET3_REV_3 + 1)
+#define VMXNET3_VERSION_GE_2(hw) ((hw)->version >= VMXNET3_REV_2 + 1)
+
 #define VMXNET3_GET_ADDR_LO(reg)   ((uint32_t)(reg))
 #define VMXNET3_GET_ADDR_HI(reg)   ((uint32_t)(((uint64_t)(reg)) >> 32))
 
-- 
2.6.2