[PATCH v2 4/8] vdpa/ifc: write queue count to MQ register

[Andy Pei]

Write queue count to IFCVF_MQ_OFFSET register
to enable multi queue feature.

Signed-off-by: Andy Pei <andy.pei at intel.com>
Signed-off-by: Huang Wei <wei_huang at intel.com>
---
 drivers/vdpa/ifc/base/ifcvf.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
index 34c8226..0444d74 100644
--- a/drivers/vdpa/ifc/base/ifcvf.c
+++ b/drivers/vdpa/ifc/base/ifcvf.c
@@ -198,6 +198,38 @@
 	IFCVF_WRITE_REG32(val >> 32, hi);
 }
 
+STATIC void
+ifcvf_enable_multiqueue(struct ifcvf_hw *hw)
+{
+	u8 *mq_cfg;
+	int qid;
+	int nr_queue_pair = 0;
+
+	if (hw->device_type == IFCVF_NET) {
+		for (qid = 0; qid < hw->nr_vring; qid++) {
+			if (!hw->vring[qid].enable)
+				continue;
+			nr_queue_pair++;
+		}
+
+		if (nr_queue_pair == 0) {
+			WARNINGOUT("no enabled vring\n");
+			return;
+		}
+
+		nr_queue_pair = (nr_queue_pair + 1) / 2;
+	} else if (hw->device_type == IFCVF_BLK) {
+		nr_queue_pair = hw->nr_vring;
+	}
+
+	mq_cfg = hw->mq_cfg;
+	if (mq_cfg) {
+		*(u32 *)mq_cfg = nr_queue_pair;
+		RTE_LOG(INFO, PMD, "%d queue pairs are enabled\n",
+		nr_queue_pair);
+	}
+}
+
 STATIC int
 ifcvf_hw_enable(struct ifcvf_hw *hw)
 {
@@ -215,6 +247,7 @@
 		return -1;
 	}
 
+	ifcvf_enable_multiqueue(hw);
 	for (i = 0; i < hw->nr_vring; i++) {
 		IFCVF_WRITE_REG16(i, &cfg->queue_select);
 		io_write64_twopart(hw->vring[i].desc, &cfg->queue_desc_lo,
-- 
1.8.3.1