[PATCH v5 2/8] vdpa/ifc: add multi-queue support

[Andy Pei <andy.pei@intel.com>]

Enable VHOST_USER_PROTOCOL_F_MQ feature.
Expose IFCVF_MQ_OFFSET register to enable multi-queue.

Signed-off-by: Andy Pei <andy.pei@intel.com>
Signed-off-by: Huang Wei <wei.huang@intel.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
---
 drivers/vdpa/ifc/base/ifcvf.c | 9 +++++++++
 drivers/vdpa/ifc/base/ifcvf.h | 2 ++
 drivers/vdpa/ifc/ifcvf_vdpa.c | 1 +
 3 files changed, 12 insertions(+)

diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
index f1e1474..81c68c0 100644
--- a/drivers/vdpa/ifc/base/ifcvf.c
+++ b/drivers/vdpa/ifc/base/ifcvf.c
@@ -90,6 +90,15 @@
 	if (!hw->lm_cfg)
 		WARNINGOUT("HW support live migration not support!\n");
 
+	/* For some hardware implementation, for example:
+	 * the BAR 4 of PF is NULL, while BAR 4 of VF is not.
+	 * This code makes sure hw->mq_cfg is a valid address.
+	 */
+	if (hw->mem_resource[4].addr)
+		hw->mq_cfg = hw->mem_resource[4].addr + IFCVF_MQ_OFFSET;
+	else
+		hw->mq_cfg = NULL;
+
 	if (hw->common_cfg == NULL || hw->notify_base == NULL ||
 			hw->isr == NULL || hw->dev_cfg == NULL) {
 		DEBUGOUT("capability incomplete\n");
diff --git a/drivers/vdpa/ifc/base/ifcvf.h b/drivers/vdpa/ifc/base/ifcvf.h
index ef7697a..d16d9ab 100644
--- a/drivers/vdpa/ifc/base/ifcvf.h
+++ b/drivers/vdpa/ifc/base/ifcvf.h
@@ -50,6 +50,7 @@
 
 #define IFCVF_LM_CFG_SIZE		0x40
 #define IFCVF_LM_RING_STATE_OFFSET	0x20
+#define IFCVF_MQ_OFFSET			0x28
 
 #define IFCVF_LM_LOGGING_CTRL		0x0
 
@@ -149,6 +150,7 @@ struct ifcvf_hw {
 	u16    *notify_base;
 	u16    *notify_addr[IFCVF_MAX_QUEUES * 2];
 	u8     *lm_cfg;
+	u8     *mq_cfg;
 	struct vring_info vring[IFCVF_MAX_QUEUES * 2];
 	u8 nr_vring;
 	int device_type;
diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c
index b4389a0..008cf89 100644
--- a/drivers/vdpa/ifc/ifcvf_vdpa.c
+++ b/drivers/vdpa/ifc/ifcvf_vdpa.c
@@ -1248,6 +1248,7 @@ struct rte_vdpa_dev_info {
 		 1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD | \
 		 1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER | \
 		 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD | \
+		 1ULL << VHOST_USER_PROTOCOL_F_MQ | \
 		 1ULL << VHOST_USER_PROTOCOL_F_STATUS)
 
 #define VDPA_BLK_PROTOCOL_FEATURES \
-- 
1.8.3.1