arch/arm/plat-feroceon/mv_drivers_lsp/mv_neta/bm/bm_sysfs.c

/*******************************************************************************
Copyright (C) Marvell International Ltd. and its affiliates

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********************************************************************************
Marvell GPL License Option

If you received this File from Marvell, you may opt to use, redistribute and/or
modify this File in accordance with the terms and conditions of the General
Public License Version 2, June 1991 (the "GPL License"), a copy of which is
available along with the File in the license.txt file or by writing to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
on the worldwide web at http://www.gnu.org/licenses/gpl.txt.

THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
DISCLAIMED.  The GPL License provides additional details about this warranty
disclaimer.
*******************************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>

#include "gbe/mvNeta.h"
#include "net_dev/mv_netdev.h"
#include "bm/mvBm.h"

static ssize_t bm_help(char *buf)
{
	int off = 0;

	off += sprintf(buf+off, "cat                regs         - show BM registers\n");
	off += sprintf(buf+off, "cat                stat         - show BM status\n");
	off += sprintf(buf+off, "cat                config       - show compile-time BM configuration\n");
	off += sprintf(buf+off, "echo p v           > dump       - dump BM pool <p>. v=0-brief, v=1-full\n");
	off += sprintf(buf+off, "echo p s           > size       - set packet size <s> to BM pool <p>\n");

	return off;
}

static ssize_t bm_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{
	int          err = 0;
	const char   *name = attr->attr.name;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (!strcmp(name, "help"))
		return bm_help(buf);
	else if (!strcmp(name, "regs"))
		mvBmRegs();
	else if (!strcmp(name, "stat"))
		mvBmStatus();
	else if (!strcmp(name, "config"))
		mv_eth_bm_config_print();
	else {
		err = 1;
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);
	}
	return err;
}
static ssize_t bm_store(struct device *dev,
				   struct device_attribute *attr, const char *buf, size_t len)
{
	const char    *name = attr->attr.name;
	unsigned int  err = 0, pool = 0, val = 0;
	unsigned long flags;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	sscanf(buf, "%d %d", &pool, &val);

	local_irq_save(flags);

	if (!strcmp(name, "dump")) {
		mvBmPoolDump(pool, val);
	} else if (!strcmp(name, "size")) {
		err = mv_eth_ctrl_pool_size_set(pool, val);
	} else {
		err = 1;
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);
	}
	local_irq_restore(flags);

	return err ? -EINVAL : len;
}

static DEVICE_ATTR(size,   S_IWUSR, NULL, bm_store);
static DEVICE_ATTR(dump,   S_IWUSR, NULL, bm_store);
static DEVICE_ATTR(config, S_IRUSR, bm_show, NULL);
static DEVICE_ATTR(stat,   S_IRUSR, bm_show, NULL);
static DEVICE_ATTR(regs,   S_IRUSR, bm_show, NULL);
static DEVICE_ATTR(help,   S_IRUSR, bm_show, NULL);

static struct attribute *bm_attrs[] = {
	&dev_attr_size.attr,
	&dev_attr_dump.attr,
	&dev_attr_config.attr,
	&dev_attr_regs.attr,
	&dev_attr_stat.attr,
	&dev_attr_help.attr,
	NULL
};

static struct attribute_group bm_group = {
	.name = "bm",
	.attrs = bm_attrs,
};

int __devinit bm_sysfs_init(void)
{
		int err;
		struct device *pd;

		pd = bus_find_device_by_name(&platform_bus_type, NULL, "neta");
		if (!pd) {
			platform_device_register_simple("neta", -1, NULL, 0);
			pd = bus_find_device_by_name(&platform_bus_type, NULL, "neta");
		}

		if (!pd) {
			printk(KERN_ERR "%s: cannot find neta device\n", __func__);
			pd = &platform_bus;
		}

		err = sysfs_create_group(&pd->kobj, &bm_group);
		if (err) {
			printk(KERN_INFO "sysfs group failed %d\n", err);
			goto out;
		}
out:
		return err;
}

module_init(bm_sysfs_init);

MODULE_AUTHOR("Dmitri Epshtein");
MODULE_DESCRIPTION("BM for Marvell NetA");
MODULE_LICENSE("GPL");