1 files changed, 156 insertions, 0 deletions

diff --git a/drivers/net/mlx4/sense.c b/drivers/net/mlx4/sense.c
new file mode 100644
index 000000000000..6d5089ecb5af
--- /dev/null
+++ b/drivers/net/mlx4/sense.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/errno.h>
+#include <linux/if_ether.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+
+static int mlx4_SENSE_PORT(struct mlx4_dev *dev, int port,
+                           enum mlx4_port_type *type)
+{
+        u64 out_param;
+        int err = 0;
+
+        err = mlx4_cmd_imm(dev, 0, &out_param, port, 0,
+                           MLX4_CMD_SENSE_PORT, MLX4_CMD_TIME_CLASS_B);
+        if (err) {
+                mlx4_err(dev, "Sense command failed for port: %d\n", port);
+                return err;
+        }
+
+        if (out_param > 2) {
+                mlx4_err(dev, "Sense returned illegal value: 0x%llx\n", out_param);
+                return EINVAL;
+        }
+
+        *type = out_param;
+        return 0;
+}
+
+void mlx4_do_sense_ports(struct mlx4_dev *dev,
+                         enum mlx4_port_type *stype,
+                         enum mlx4_port_type *defaults)
+{
+        struct mlx4_sense *sense = &mlx4_priv(dev)->sense;
+        int err;
+        int i;
+
+        for (i = 1; i <= dev->caps.num_ports; i++) {
+                stype[i - 1] = 0;
+                if (sense->do_sense_port[i] && sense->sense_allowed[i] &&
+                    dev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
+                        err = mlx4_SENSE_PORT(dev, i, &stype[i - 1]);
+                        if (err)
+                                stype[i - 1] = defaults[i - 1];
+                } else
+                        stype[i - 1] = defaults[i - 1];
+        }
+
+        /*
+         * Adjust port configuration:
+         * If port 1 sensed nothing and port 2 is IB, set both as IB
+         * If port 2 sensed nothing and port 1 is Eth, set both as Eth
+         */
+        if (stype[0] == MLX4_PORT_TYPE_ETH) {
+                for (i = 1; i < dev->caps.num_ports; i++)
+                        stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_ETH;
+        }
+        if (stype[dev->caps.num_ports - 1] == MLX4_PORT_TYPE_IB) {
+                for (i = 0; i < dev->caps.num_ports - 1; i++)
+                        stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_IB;
+        }
+
+        /*
+         * If sensed nothing, remain in current configuration.
+         */
+        for (i = 0; i < dev->caps.num_ports; i++)
+                stype[i] = stype[i] ? stype[i] : defaults[i];
+
+}
+
+static void mlx4_sense_port(struct work_struct *work)
+{
+        struct delayed_work *delay = container_of(work, struct delayed_work, work);
+        struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
+                                                sense_poll);
+        struct mlx4_dev *dev = sense->dev;
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        enum mlx4_port_type stype[MLX4_MAX_PORTS];
+
+        mutex_lock(&priv->port_mutex);
+        mlx4_do_sense_ports(dev, stype, &dev->caps.port_type[1]);
+
+        if (mlx4_check_port_params(dev, stype))
+                goto sense_again;
+
+        if (mlx4_change_port_types(dev, stype))
+                mlx4_err(dev, "Failed to change port_types\n");
+
+sense_again:
+        mutex_unlock(&priv->port_mutex);
+        queue_delayed_work(mlx4_wq , &sense->sense_poll,
+                           round_jiffies_relative(MLX4_SENSE_RANGE));
+}
+
+void mlx4_start_sense(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_sense *sense = &priv->sense;
+
+        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP))
+                return;
+
+        queue_delayed_work(mlx4_wq , &sense->sense_poll,
+                           round_jiffies_relative(MLX4_SENSE_RANGE));
+}
+
+void mlx4_stop_sense(struct mlx4_dev *dev)
+{
+        cancel_delayed_work_sync(&mlx4_priv(dev)->sense.sense_poll);
+}
+
+void  mlx4_sense_init(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_sense *sense = &priv->sense;
+        int port;
+
+        sense->dev = dev;
+        for (port = 1; port <= dev->caps.num_ports; port++)
+                sense->do_sense_port[port] = 1;
+
+        INIT_DELAYED_WORK_DEFERRABLE(&sense->sense_poll, mlx4_sense_port);
+}