Add sysfs interface for Soft RoCE, mainly for binding the Soft RoCE
driver with an Ethernet net device.
Signed-off-by: Kamal Heib <kamalh@xxxxxxxxxxxx>
Signed-off-by: Amir Vadai <amirv@xxxxxxxxxxxx>
Signed-off-by: Moni Shoua <monis@xxxxxxxxxxxx>
Reviewed-by: Haggai Eran <haggaie@xxxxxxxxxxxx>
---
drivers/infiniband/hw/rxe/rxe_sysfs.c | 157 ++++++++++++++++++++++++++++++++++
1 file changed, 157 insertions(+)
create mode 100644 drivers/infiniband/hw/rxe/rxe_sysfs.c
diff --git a/drivers/infiniband/hw/rxe/rxe_sysfs.c b/drivers/infiniband/hw/rxe/rxe_sysfs.c
new file mode 100644
index 0000000..cf8e778
--- /dev/null
+++ b/drivers/infiniband/hw/rxe/rxe_sysfs.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2015 System Fabric Works, Inc. 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 "rxe.h"
+#include "rxe_net.h"
+
+/* Copy argument and remove trailing CR. Return the new length. */
+static int sanitize_arg(const char *val, char *intf, int intf_len)
+{
+ int len;
+
+ if (!val)
+ return 0;
+
+ /* Remove newline. */
+ for (len = 0; len < intf_len - 1 && val[len] && val[len] != '\n'; len++)
+ intf[len] = val[len];
+ intf[len] = 0;
+
+ if (len == 0 || (val[len] != 0 && val[len] != '\n'))
+ return 0;
+
+ return len;
+}
+
+static void rxe_set_port_state(struct net_device *ndev)
+{
+ struct rxe_dev *rxe = net_to_rxe(ndev);
+ bool is_up = netif_running(ndev) && netif_carrier_ok(ndev);
+
+ if (!rxe)
+ goto out;
+
+ if (is_up)
+ rxe_port_up(rxe);
+ else
+ rxe_port_down(rxe); /* down for unknown state */
+out:
+ return;
+}
+
+static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
+{
+ int len;
+ int err = 0;
+ char intf[32];
+ struct net_device *ndev = NULL;
+ struct rxe_dev *rxe;
+
+ len = sanitize_arg(val, intf, sizeof(intf));
+ if (!len) {
+ pr_err("rxe: add: invalid interface name\n");
+ err = -EINVAL;
+ goto err;
+ }
+
+ ndev = dev_get_by_name(&init_net, intf);
+ if (!ndev) {
+ pr_err("interface %s not found\n", intf);
+ err = -EINVAL;
+ goto err;
+ }
+
+ if (net_to_rxe(ndev)) {
+ pr_err("rxe: already configured on %s\n", intf);
+ err = -EINVAL;
+ goto err;
+ }
+
+ rxe = rxe_net_add(ndev);
+ if (!rxe) {
+ pr_err("rxe: failed to add %s\n", intf);
+ err = -EINVAL;
+ goto err;
+ }
+
+ rxe_set_port_state(ndev);
+ pr_info("rxe: added %s to %s\n", rxe->ib_dev.name, intf);
+err:
+ if (ndev)
+ dev_put(ndev);
+ return err;
+}
+
+static int rxe_param_set_remove(const char *val, const struct kernel_param *kp)
+{
+ int len;
+ char intf[32];
+ struct rxe_dev *rxe;
+
+ len = sanitize_arg(val, intf, sizeof(intf));
+ if (!len) {
+ pr_err("rxe: add: invalid interface name\n");
+ return -EINVAL;
+ }
+
+ if (strncmp("all", intf, len) == 0) {
+ pr_info("rxe_sys: remove all");
+ rxe_remove_all();
+ return 0;
+ }
+
+ rxe = get_rxe_by_name(intf);
+
+ if (!rxe) {
+ pr_err("rxe: not configured on %s\n", intf);
+ return -EINVAL;
+ }
+
+ list_del(&rxe->list);
+ rxe_remove(rxe);
+
+ return 0;
+}
+
+static const struct kernel_param_ops rxe_add_ops = {
+ .set = rxe_param_set_add,
+};
+
+static const struct kernel_param_ops rxe_remove_ops = {
+ .set = rxe_param_set_remove,
+};
+
+module_param_cb(add, &rxe_add_ops, NULL, 0200);
+MODULE_PARM_DESC(add, "Create RXE device over network interface");
+module_param_cb(remove, &rxe_remove_ops, NULL, 0200);
+MODULE_PARM_DESC(remove, "Remove RXE device over network interface");
--
1.8.3.1
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