diff options
Diffstat (limited to 'drivers/staging/xroeframer/sysfs_xroe_framer_udp.c')
| -rw-r--r-- | drivers/staging/xroeframer/sysfs_xroe_framer_udp.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/staging/xroeframer/sysfs_xroe_framer_udp.c b/drivers/staging/xroeframer/sysfs_xroe_framer_udp.c new file mode 100644 index 000000000000..8f8a77b25da7 --- /dev/null +++ b/drivers/staging/xroeframer/sysfs_xroe_framer_udp.c @@ -0,0 +1,181 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Xilinx, Inc. + * + * Vasileios Bimpikas <vasileios.bimpikas@xilinx.com> + */ + +#include <linux/init.h> +#include <linux/kobject.h> +#include <linux/module.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/sysfs.h> +#include "xroe_framer.h" + +enum { XROE_SIZE_MAX = 15 }; +static int xroe_size; + +/** + * udp_source_port_show - Returns the UDP source port + * @kobj: The kernel object of the entry + * @attr: The attributes of the kernel object + * @buff: The buffer containing the UDP source port + * + * Returns the UDP source port + * + * Return: XROE_SIZE_MAX on success + */ +static ssize_t udp_source_port_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buff) +{ + u32 source_port; + + source_port = utils_sysfs_show_wrapper(ETH_UDP_SOURCE_PORT_ADDR, + ETH_UDP_SOURCE_PORT_OFFSET, + ETH_UDP_SOURCE_PORT_MASK, kobj); + sprintf(buff, "%d\n", source_port); + return XROE_SIZE_MAX; +} + +/** + * udp_source_port_store - Writes to the UDP source port sysfs entry + * @kobj: The kernel object of the entry + * @attr: The attributes of the kernel object + * @buff: The buffer containing the UDP source port + * @count: The number of characters typed by the user + * + * Writes to the UDP source port sysfs entry + * + * Return: XROE_SIZE_MAX or the value of "count", if that's lesser, on success + */ +static ssize_t udp_source_port_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buff, size_t count) +{ + int ret; + u32 source_port; + + xroe_size = min_t(size_t, count, (size_t)XROE_SIZE_MAX); + ret = kstrtouint(buff, 10, &source_port); + if (ret) + return ret; + utils_sysfs_store_wrapper(ETH_UDP_SOURCE_PORT_ADDR, + ETH_UDP_SOURCE_PORT_OFFSET, + ETH_UDP_SOURCE_PORT_MASK, source_port, kobj); + return xroe_size; +} + +/** + * udp_destination_port_show - Returns the UDP destination port + * @kobj: The kernel object of the entry + * @attr: The attributes of the kernel object + * @buff: The buffer containing the UDP destination port + * + * Returns the UDP destination port + * + * Return: XROE_SIZE_MAX on success + */ +static ssize_t udp_destination_port_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buff) +{ + u32 dest_port; + + dest_port = utils_sysfs_show_wrapper(ETH_UDP_DESTINATION_PORT_ADDR, + ETH_UDP_DESTINATION_PORT_OFFSET, + ETH_UDP_DESTINATION_PORT_MASK, + kobj); + sprintf(buff, "%d\n", dest_port); + return XROE_SIZE_MAX; +} + +/** + * udp_destination_port_store - Writes to the UDP destination port sysfs entry + * @kobj: The kernel object of the entry + * @attr: The attributes of the kernel object + * @buff: The buffer containing the UDP destination port + * @count: The number of characters typed by the user + * + * Writes to the UDP destination port sysfs entry + * + * Return: XROE_SIZE_MAX or the value of "count", if that's lesser, on success + */ +static ssize_t udp_destination_port_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buff, size_t count) +{ + int ret; + u32 dest_port; + + xroe_size = min_t(size_t, count, (size_t)XROE_SIZE_MAX); + ret = kstrtouint(buff, 10, &dest_port); + if (ret) + return ret; + utils_sysfs_store_wrapper(ETH_UDP_DESTINATION_PORT_ADDR, + ETH_UDP_DESTINATION_PORT_OFFSET, + ETH_UDP_DESTINATION_PORT_MASK, dest_port, + kobj); + return xroe_size; +} + +/* TODO Use DEVICE_ATTR/_RW/_RO macros */ + +static struct kobj_attribute source_port = + __ATTR(source_port, 0660, udp_source_port_show, + udp_source_port_store); +static struct kobj_attribute dest_port = + __ATTR(dest_port, 0660, udp_destination_port_show, + udp_destination_port_store); + +static struct attribute *attrs[] = { + &source_port.attr, + &dest_port.attr, + NULL, +}; + +static struct attribute_group attr_group = { + .attrs = attrs, +}; + +static struct kobject *kobj_udp[MAX_NUM_ETH_PORTS]; + +/** + * xroe_sysfs_udp_init - Creates the xroe sysfs "udp" subdirectory and entries + * + * Return: 0 on success, negative value in case of failure to + * create the sysfs group + * + * Creates the xroe sysfs "udp" subdirectory and entries under "xroe" + */ +int xroe_sysfs_udp_init(void) +{ + int ret; + int i; + + for (i = 0; i < 4; i++) { + kobj_udp[i] = kobject_create_and_add("udp", kobj_eth_ports[i]); + if (!kobj_udp[i]) + return -ENOMEM; + ret = sysfs_create_group(kobj_udp[i], &attr_group); + if (ret) + kobject_put(kobj_udp[i]); + } + return ret; +} + +/** + * xroe_sysfs_ipv6_exit - Deletes the xroe sysfs "udp" subdirectory & entries + * + * Deletes the xroe sysfs "udp" subdirectory and entries, + * under the "xroe" entry + * + */ +void xroe_sysfs_udp_exit(void) +{ + int i; + + for (i = 0; i < MAX_NUM_ETH_PORTS; i++) + kobject_put(kobj_udp[i]); +} |