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From: Andy Pei <andy.pei@intel.com>
To: dev@dpdk.org
Cc: chenbo.xia@intel.com, maxime.coquelin@redhat.com, gang.cao@intel.com,
 changpeng.liu@intel.com
Subject: [PATCH v5 14/16] vdpa/ifc/base: for blk device,
 live migration register is different from net device
Date: Mon, 28 Mar 2022 15:17:40 +0800
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Errors-To: dev-bounces@dpdk.org

1.last_avail_idx is lower 16 bit of the register.
2.address of ring_state register is different between net and blk device.

Signed-off-by: Andy Pei <andy.pei@intel.com>
---
 drivers/vdpa/ifc/base/ifcvf.c | 36 +++++++++++++++++++++++++++++-------
 drivers/vdpa/ifc/base/ifcvf.h |  1 +
 2 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
index e417c50..d923266 100644
--- a/drivers/vdpa/ifc/base/ifcvf.c
+++ b/drivers/vdpa/ifc/base/ifcvf.c
@@ -218,10 +218,18 @@
 				&cfg->queue_used_hi);
 		IFCVF_WRITE_REG16(hw->vring[i].size, &cfg->queue_size);
 
-		*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
-				(i / 2) * IFCVF_LM_CFG_SIZE + (i % 2) * 4) =
-			(u32)hw->vring[i].last_avail_idx |
-			((u32)hw->vring[i].last_used_idx << 16);
+		if (hw->is_blk == IFCVF_BLK) {
+			*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
+				i * IFCVF_LM_CFG_SIZE) =
+				(u32)hw->vring[i].last_avail_idx |
+				((u32)hw->vring[i].last_used_idx << 16);
+		} else if (hw->is_blk == IFCVF_NET) {
+			*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
+				(i / 2) * IFCVF_LM_CFG_SIZE +
+				(i % 2) * 4) =
+				(u32)hw->vring[i].last_avail_idx |
+				((u32)hw->vring[i].last_used_idx << 16);
+		}
 
 		IFCVF_WRITE_REG16(i + 1, &cfg->queue_msix_vector);
 		if (IFCVF_READ_REG16(&cfg->queue_msix_vector) ==
@@ -254,9 +262,23 @@
 		IFCVF_WRITE_REG16(i, &cfg->queue_select);
 		IFCVF_WRITE_REG16(0, &cfg->queue_enable);
 		IFCVF_WRITE_REG16(IFCVF_MSI_NO_VECTOR, &cfg->queue_msix_vector);
-		ring_state = *(u32 *)(hw->lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
-				(i / 2) * IFCVF_LM_CFG_SIZE + (i % 2) * 4);
-		hw->vring[i].last_avail_idx = (u16)(ring_state >> 16);
+
+		if (hw->is_blk) {
+			ring_state = *(u32 *)(hw->lm_cfg +
+					IFCVF_LM_RING_STATE_OFFSET +
+					i * IFCVF_LM_CFG_SIZE);
+		} else if (hw->is_blk == IFCVF_NET) {
+			ring_state = *(u32 *)(hw->lm_cfg +
+					IFCVF_LM_RING_STATE_OFFSET +
+					(i / 2) * IFCVF_LM_CFG_SIZE +
+					(i % 2) * 4);
+		}
+
+		if (hw->is_blk == IFCVF_BLK)
+			hw->vring[i].last_avail_idx =
+				(u16)(ring_state & IFCVF_16_BIT_MASK);
+		else if (hw->is_blk == IFCVF_NET)
+			hw->vring[i].last_avail_idx = (u16)(ring_state >> 16);
 		hw->vring[i].last_used_idx = (u16)(ring_state >> 16);
 	}
 }
diff --git a/drivers/vdpa/ifc/base/ifcvf.h b/drivers/vdpa/ifc/base/ifcvf.h
index 8e602af..7367094 100644
--- a/drivers/vdpa/ifc/base/ifcvf.h
+++ b/drivers/vdpa/ifc/base/ifcvf.h
@@ -65,6 +65,7 @@
 #define IFCVF_MEDIATED_VRING		0x200000000000
 
 #define IFCVF_32_BIT_MASK		0xffffffff
+#define IFCVF_16_BIT_MASK		0xffff
 
 #ifndef VHOST_USER_PROTOCOL_F_CONFIG
 #define VHOST_USER_PROTOCOL_F_CONFIG	9
-- 
1.8.3.1