[dpdk-dev] [PATCH 3/9] vdpa/ifc: add support to vDPA queue enable

[Maxime Coquelin]

This patch adds support to enabling and disabling
vrings on a per-vring granularity.

Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 drivers/vdpa/ifc/base/ifcvf.c |  9 +++++++++
 drivers/vdpa/ifc/base/ifcvf.h |  4 ++++
 drivers/vdpa/ifc/ifcvf_vdpa.c | 23 ++++++++++++++++++++++-
 3 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
index 3c0b2dff66..dd4e7468ae 100644
--- a/drivers/vdpa/ifc/base/ifcvf.c
+++ b/drivers/vdpa/ifc/base/ifcvf.c
@@ -327,3 +327,12 @@ ifcvf_get_queue_notify_off(struct ifcvf_hw *hw, int qid)
        return (u8 *)hw->notify_addr[qid] -
                (u8 *)hw->mem_resource[hw->notify_region].addr;
 }
+
+void
+ifcvf_queue_enable(struct ifcvf_hw *hw, u16 qid,  u16 enable)
+{
+       struct ifcvf_pci_common_cfg *cfg = hw->common_cfg;
+
+       IFCVF_WRITE_REG16(qid, &cfg->queue_select);
+       IFCVF_WRITE_REG16(enable, &cfg->queue_enable);
+}
diff --git a/drivers/vdpa/ifc/base/ifcvf.h b/drivers/vdpa/ifc/base/ifcvf.h
index eb04a94067..bd85010eff 100644
--- a/drivers/vdpa/ifc/base/ifcvf.h
+++ b/drivers/vdpa/ifc/base/ifcvf.h
@@ -159,4 +159,8 @@ ifcvf_get_notify_region(struct ifcvf_hw *hw);
 u64
 ifcvf_get_queue_notify_off(struct ifcvf_hw *hw, int qid);
 
+void
+ifcvf_queue_enable(struct ifcvf_hw *hw, u16 qid,  u16 enable);
+
+
 #endif /* _IFCVF_H_ */
diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c
index ec97178dcb..55ce0cf13d 100644
--- a/drivers/vdpa/ifc/ifcvf_vdpa.c
+++ b/drivers/vdpa/ifc/ifcvf_vdpa.c
@@ -937,6 +937,27 @@ ifcvf_dev_close(int vid)
        return 0;
 }
 
+static int
+ifcvf_set_vring_state(int vid, int vring, int state)
+{
+       int did;
+       struct internal_list *list;
+       struct ifcvf_internal *internal;
+
+       did = rte_vhost_get_vdpa_device_id(vid);
+       list = find_internal_resource_by_did(did);
+       if (list == NULL) {
+               DRV_LOG(ERR, "Invalid device id: %d", did);
+               return -1;
+       }
+
+       internal = list->internal;
+
+       ifcvf_queue_enable(&internal->hw, (uint16_t)vring, (uint16_t) state);
+
+       return 0;
+}
+
 static int
 ifcvf_set_features(int vid)
 {
@@ -1086,7 +1107,7 @@ static struct rte_vdpa_dev_ops ifcvf_ops = {
        .get_protocol_features = ifcvf_get_protocol_features,
        .dev_conf = ifcvf_dev_config,
        .dev_close = ifcvf_dev_close,
-       .set_vring_state = NULL,
+       .set_vring_state = ifcvf_set_vring_state,
        .set_features = ifcvf_set_features,
        .migration_done = NULL,
        .get_vfio_group_fd = ifcvf_get_vfio_group_fd,
-- 
2.25.4