[dpdk-dev] [RFC 18/21] vdpa/mlx5: use HCA attributes from context device

[Michael Baum]

Use HCA attributes from context device structure, instead of query it
for itself.

Signed-off-by: Michael Baum <michaelba at nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa.c | 28 ++++++++--------------------
 1 file changed, 8 insertions(+), 20 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.c b/drivers/vdpa/mlx5/mlx5_vdpa.c
index 2b1b521313..317d2e8ed4 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa.c
@@ -506,36 +506,24 @@ static int
 mlx5_vdpa_dev_probe(struct mlx5_common_device *dev)
 {
 	struct mlx5_vdpa_priv *priv = NULL;
-	struct mlx5_hca_attr attr;
-	int ret;
+	struct mlx5_hca_attr *attr = &dev->ctx.hca_attr;
 
-	ret = mlx5_devx_cmd_query_hca_attr(dev->ctx.ctx, &attr);
-	if (ret) {
-		DRV_LOG(ERR, "Unable to read HCA capabilities.");
-		rte_errno = ENOTSUP;
-		return -rte_errno;
-	} else if (!attr.vdpa.valid || !attr.vdpa.max_num_virtio_queues) {
-		DRV_LOG(ERR, "Not enough capabilities to support vdpa, maybe "
-			"old FW/OFED version?");
-		rte_errno = ENOTSUP;
-		return -rte_errno;
-	}
-	if (!attr.vdpa.queue_counters_valid)
+	if (!attr->vdpa.queue_counters_valid)
 		DRV_LOG(DEBUG, "No capability to support virtq statistics.");
 	priv = rte_zmalloc("mlx5 vDPA device private", sizeof(*priv) +
 			   sizeof(struct mlx5_vdpa_virtq) *
-			   attr.vdpa.max_num_virtio_queues * 2,
+			   attr->vdpa.max_num_virtio_queues * 2,
 			   RTE_CACHE_LINE_SIZE);
 	if (!priv) {
 		DRV_LOG(ERR, "Failed to allocate private memory.");
 		rte_errno = ENOMEM;
 		return -rte_errno;
 	}
-	priv->caps = attr.vdpa;
-	priv->log_max_rqt_size = attr.log_max_rqt_size;
-	priv->num_lag_ports = attr.num_lag_ports;
-	priv->qp_ts_format = attr.qp_ts_format;
-	if (attr.num_lag_ports == 0)
+	priv->caps = attr->vdpa;
+	priv->log_max_rqt_size = attr->log_max_rqt_size;
+	priv->num_lag_ports = attr->num_lag_ports;
+	priv->qp_ts_format = attr->qp_ts_format;
+	if (attr->num_lag_ports == 0)
 		priv->num_lag_ports = 1;
 	priv->dev_ctx = &dev->ctx;
 	priv->var = mlx5_glue->dv_alloc_var(priv->dev_ctx->ctx, 0);
-- 
2.25.1