Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 */
 
#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 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;
<------>struct rxe_dev *exists;
 
<------>if (!rxe_initialized) {
<------><------>pr_err("Module parameters are not supported, use rdma link add or rxe_cfg\n");
<------><------>return -EAGAIN;
<------>}
 
<------>len = sanitize_arg(val, intf, sizeof(intf));
<------>if (!len) {
<------><------>pr_err("add: invalid interface name\n");
<------><------>return -EINVAL;
<------>}
 
<------>ndev = dev_get_by_name(&init_net, intf);
<------>if (!ndev) {
<------><------>pr_err("interface %s not found\n", intf);
<------><------>return -EINVAL;
<------>}
 
<------>if (is_vlan_dev(ndev)) {
<------><------>pr_err("rxe creation allowed on top of a real device only\n");
<------><------>err = -EPERM;
<------><------>goto err;
<------>}
 
<------>exists = rxe_get_dev_from_net(ndev);
<------>if (exists) {
<------><------>ib_device_put(&exists->ib_dev);
<------><------>pr_err("already configured on %s\n", intf);
<------><------>err = -EINVAL;
<------><------>goto err;
<------>}
 
<------>err = rxe_net_add("rxe%d", ndev);
<------>if (err) {
<------><------>pr_err("failed to add %s\n", intf);
<------><------>goto err;
<------>}
 
err:
<------>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 ib_device *ib_dev;
 
<------>len = sanitize_arg(val, intf, sizeof(intf));
<------>if (!len) {
<------><------>pr_err("add: invalid interface name\n");
<------><------>return -EINVAL;
<------>}
 
<------>if (strncmp("all", intf, len) == 0) {
<------><------>pr_info("rxe_sys: remove all");
<------><------>ib_unregister_driver(RDMA_DRIVER_RXE);
<------><------>return 0;
<------>}
 
<------>ib_dev = ib_device_get_by_name(intf, RDMA_DRIVER_RXE);
<------>if (!ib_dev) {
<------><------>pr_err("not configured on %s\n", intf);
<------><------>return -EINVAL;
<------>}
 
<------>ib_unregister_device_and_put(ib_dev);
 
<------>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, "DEPRECATED.  Create RXE device over network interface");
module_param_cb(remove, &rxe_remove_ops, NULL, 0200);
MODULE_PARM_DESC(remove, "DEPRECATED.  Remove RXE device over network interface");