From: Yishai Hadas <yishaih@mellanox.com>
Date: Sun, 9 Dec 2018 10:52:36 +0000 (+0200)
Subject: IB/mlx5: Allocate the per-port Q counter shared when DEVX is supported
X-Git-Tag: v5.15~7314^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aa74be6eeade1caf3ef945ff1812059f3d7dc947;p=platform%2Fkernel%2Flinux-starfive.git

IB/mlx5: Allocate the per-port Q counter shared when DEVX is supported

The per-port Q counter is some kernel resource and as such may be used by
few UID(s) upon DEVX usage.

To enable using it for QP/RQ when DEVX context is used need to allocate it
with a sharing mode indication to let firmware allows its usage.

The UID = 0xffff was chosen to mark it.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
---

diff --git a/drivers/infiniband/hw/mlx5/cmd.c b/drivers/infiniband/hw/mlx5/cmd.c
index 59d569c..356bccc 100644
--- a/drivers/infiniband/hw/mlx5/cmd.c
+++ b/drivers/infiniband/hw/mlx5/cmd.c
@@ -328,3 +328,20 @@ int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid)
 	MLX5_SET(dealloc_xrcd_in, in, uid, uid);
 	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 }
+
+int mlx5_cmd_alloc_q_counter(struct mlx5_core_dev *dev, u16 *counter_id,
+			     u16 uid)
+{
+	u32 in[MLX5_ST_SZ_DW(alloc_q_counter_in)]   = {0};
+	u32 out[MLX5_ST_SZ_DW(alloc_q_counter_out)] = {0};
+	int err;
+
+	MLX5_SET(alloc_q_counter_in, in, opcode, MLX5_CMD_OP_ALLOC_Q_COUNTER);
+	MLX5_SET(alloc_q_counter_in, in, uid, uid);
+
+	err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+	if (!err)
+		*counter_id = MLX5_GET(alloc_q_counter_out, out,
+				       counter_set_id);
+	return err;
+}
diff --git a/drivers/infiniband/hw/mlx5/cmd.h b/drivers/infiniband/hw/mlx5/cmd.h
index c03c564..1e76dc6 100644
--- a/drivers/infiniband/hw/mlx5/cmd.h
+++ b/drivers/infiniband/hw/mlx5/cmd.h
@@ -61,4 +61,6 @@ int mlx5_cmd_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid,
 			u32 qpn, u16 uid);
 int mlx5_cmd_xrcd_alloc(struct mlx5_core_dev *dev, u32 *xrcdn, u16 uid);
 int mlx5_cmd_xrcd_dealloc(struct mlx5_core_dev *dev, u32 xrcdn, u16 uid);
+int mlx5_cmd_alloc_q_counter(struct mlx5_core_dev *dev, u16 *counter_id,
+			     u16 uid);
 #endif /* MLX5_IB_CMD_H */
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 75edb08..a571834 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -5115,6 +5115,9 @@ static int mlx5_ib_alloc_counters(struct mlx5_ib_dev *dev)
 {
 	int err = 0;
 	int i;
+	bool is_shared;
+
+	is_shared = MLX5_CAP_GEN(dev->mdev, log_max_uctx) != 0;
 
 	for (i = 0; i < dev->num_ports; i++) {
 		err = __mlx5_ib_alloc_counters(dev, &dev->port[i].cnts);
@@ -5124,8 +5127,10 @@ static int mlx5_ib_alloc_counters(struct mlx5_ib_dev *dev)
 		mlx5_ib_fill_counters(dev, dev->port[i].cnts.names,
 				      dev->port[i].cnts.offsets);
 
-		err = mlx5_core_alloc_q_counter(dev->mdev,
-						&dev->port[i].cnts.set_id);
+		err = mlx5_cmd_alloc_q_counter(dev->mdev,
+					       &dev->port[i].cnts.set_id,
+					       is_shared ?
+					       MLX5_SHARED_RESOURCE_UID : 0);
 		if (err) {
 			mlx5_ib_warn(dev,
 				     "couldn't allocate queue counter for port %d, err %d\n",