arch/arm/plat-feroceon/mv_drivers_lsp/mv_neta/pmt/pmt_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 "pmt/mvPmt.h"

static MV_NETA_PMT  mv_neta_pmt_e;

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

	off += mvOsSPrintf(buf+off, "p, i, a, b, c - are dec numbers\n");
	off += mvOsSPrintf(buf+off, "v, m          - are hex numbers\n");
	off += mvOsSPrintf(buf+off, "\n");

	off += mvOsSPrintf(buf+off, "cat          help          - Show this help\n");
	off += mvOsSPrintf(buf+off, "cat          sw_dump       - Show sw PMT etry\n");
	off += mvOsSPrintf(buf+off, "cat          sw_clear      - Clear sw PMT etry\n");
	off += mvOsSPrintf(buf+off, "echo v     > sw_word       - Set 4 bytes value <v> to sw entry\n");
	off += mvOsSPrintf(buf+off, "echo p     > hw_regs       - Show PMT registers\n");
	off += mvOsSPrintf(buf+off, "echo p     > hw_dump       - Dump valid PMT entries of the port <p>\n");
	off += mvOsSPrintf(buf+off, "echo p     > hw_dump_all   - Dump all PMT entries of the port <p>\n");
	off += mvOsSPrintf(buf+off, "echo p i   > hw_read       - Read PMT entry <i> on port <p> into sw entry\n");
	off += mvOsSPrintf(buf+off, "echo p i   > hw_write      - Write sw entry into PMT entry <i> on port <p>\n");
	off += mvOsSPrintf(buf+off, "echo p i   > hw_inv        - Disable PMT entry <i> on port <p>\n");
	off += mvOsSPrintf(buf+off, "echo p     > hw_inv_all    - Disable all PMT entries on port <p>\n");
	off += mvOsSPrintf(buf+off, "echo 0|1   > s_last        - Set/Clear last bit\n");
	off += mvOsSPrintf(buf+off, "echo a b c > s_flags       - Set/Clear flags: <a>-last, <b>-ipv4csum, <c>-l4csum\n");
	off += mvOsSPrintf(buf+off, "echo v     > s_rep_2b      - Replace 2 bytes with value <v>\n");
	off += mvOsSPrintf(buf+off, "echo v     > s_add_2b      - Add 2 bytes with value <v> to sw entry\n");
	off += mvOsSPrintf(buf+off, "echo a b c > s_del_2b      - Delete <a> bytes, Skip <b> bytes before, Skip <c> bytes after\n");
	off += mvOsSPrintf(buf+off, "echo v m   > s_rep_lsb     - Replace LSB with value <v> and mask <m>\n");
	off += mvOsSPrintf(buf+off, "echo v m   > s_rep_msb     - Replace MSB with value <v> and mask <m>\n");
	off += mvOsSPrintf(buf+off, "echo v     > s_ip_csum     - Replace IP checksum. <v> used as additional info\n");
	off += mvOsSPrintf(buf+off, "echo v     > s_l4_csum     - Replace TCP/UDP checksum. <v> used as additional info\n");
	off += mvOsSPrintf(buf+off, "echo a b   > s_dec_lsb     - Decrement LSB, Skip <a> bytes before, Skip <b> bytes after\n");
	off += mvOsSPrintf(buf+off, "echo a b   > s_dec_msb     - Decrement MSB, Skip <a> bytes before, Skip <b> bytes after\n");
	off += mvOsSPrintf(buf+off, "echo a     > s_skip        - Skip <a> bytes. Must be even\n");
	off += mvOsSPrintf(buf+off, "echo a b c > s_jump        - Jump to entry <a>. <b>=1-skip,2-subroutine. <c>=1-green,2-yellow\n");

	return off;
}

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

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

	if (!strcmp(name, "help"))
		return pmt_help(buf);

	if (!strcmp(name, "sw_dump")) {
		mvNetaPmtEntryPrint(&mv_neta_pmt_e);
	} else if (!strcmp(name, "sw_clear")) {
		MV_NETA_PMT_CLEAR(&mv_neta_pmt_e);
	}

	return 0;
}

static ssize_t pmt_hw_store(struct device *dev,
			struct device_attribute *attr, const char *buf, size_t len)
{
	const char    *name = attr->attr.name;
	unsigned int  err = 0, p = 0, i = 0;
	unsigned long flags;

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

	sscanf(buf, "%d %d", &p, &i);

	local_irq_save(flags);

	if (!strcmp(name, "hw_dump")) {
		mvNetaPmtDump(p, 1);
	} else if (!strcmp(name, "hw_dump_all")) {
		mvNetaPmtDump(p, 0);
	} else if (!strcmp(name, "hw_regs")) {
		mvNetaPmtRegs(p, i);
	} else if (!strcmp(name, "hw_write")) {
		err = mvNetaPmtWrite(p, i, &mv_neta_pmt_e);
	} else if (!strcmp(name, "hw_read")) {
		err = mvNetaPmtRead(p, i, &mv_neta_pmt_e);
	} else if (!strcmp(name, "hw_inv")) {
		MV_NETA_PMT_INVALID_SET(&mv_neta_pmt_e);
		err = mvNetaPmtWrite(p, i, &mv_neta_pmt_e);
	} else if (!strcmp(name, "hw_inv_all")) {
		err = mvNetaPmtClear(p);
	} else
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);

	local_irq_restore(flags);

	if (err)
		printk(KERN_ERR "%s: <%s>, error %d\n", __func__, attr->attr.name, err);

	return err ? -EINVAL : len;
}

static ssize_t pmt_sw_dec_store(struct device *dev,
			struct device_attribute *attr, const char *buf, size_t len)
{
	const char	*name = attr->attr.name;
	unsigned int    err = 0, a = 0, b = 0, c = 0;
	unsigned long   flags;

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

	sscanf(buf, "%d %d %d", &a, &b, &c);

	local_irq_save(flags);

	if (!strcmp(name, "s_last")) {
		mvNetaPmtLastFlag(&mv_neta_pmt_e, a);
	} else if (!strcmp(name, "s_flags")) {
		mvNetaPmtFlags(&mv_neta_pmt_e, a, b, c);
	} else if (!strcmp(name, "s_del")) {
		mvNetaPmtDelShorts(&mv_neta_pmt_e, a/2, b/2, c/2);
	} else if (!strcmp(name, "s_skip")) {
		mvNetaPmtSkip(&mv_neta_pmt_e, a/2);
	} else if (!strcmp(name, "s_dec_lsb")) {
		mvNetaPmtDecLSB(&mv_neta_pmt_e, a/2, b/2);
	} else if (!strcmp(name, "s_dec_msb")) {
		mvNetaPmtDecMSB(&mv_neta_pmt_e, a/2, b/2);
	} else if (!strcmp(name, "s_jump")) {
		mvNetaPmtJump(&mv_neta_pmt_e, a, b, c);
	} else
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);

	local_irq_restore(flags);

	if (err)
		printk(KERN_ERR "%s: <%s>, error %d\n", __func__, attr->attr.name, err);

	return err ? -EINVAL : len;
}

static ssize_t pmt_sw_hex_store(struct device *dev,
				struct device_attribute *attr, const char *buf, size_t len)
{
	const char	*name = attr->attr.name;
	unsigned int    err = 0, v = 0, a = 0;
	unsigned long   flags;

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

	sscanf(buf, "%x %d", &v, &a);

	local_irq_save(flags);

	if (!strcmp(name, "sw_word")) {
		mv_neta_pmt_e.word = v;
	} else if (!strcmp(name, "s_rep_2b")) {
		mvNetaPmtReplace2Bytes(&mv_neta_pmt_e, v);
	} else if (!strcmp(name, "s_add_2b")) {
		mvNetaPmtAdd2Bytes(&mv_neta_pmt_e, v);
	} else if (!strcmp(name, "s_rep_lsb")) {
		mvNetaPmtReplaceLSB(&mv_neta_pmt_e, v, a);
	} else if (!strcmp(name, "s_rep_msb")) {
		mvNetaPmtReplaceMSB(&mv_neta_pmt_e, v, a);
	} else if (!strcmp(name, "s_ip_csum")) {
		mvNetaPmtReplaceIPv4csum(&mv_neta_pmt_e, v);
	} else if (!strcmp(name, "s_l4_csum")) {
		mvNetaPmtReplaceL4csum(&mv_neta_pmt_e, v);
	} else
		printk(KERN_ERR "%s: illegal operation <%s>\n", __func__, attr->attr.name);

	local_irq_restore(flags);

	if (err)
		printk(KERN_ERR "%s: <%s>, error %d\n", __func__, attr->attr.name, err);

	return err ? -EINVAL : len;
}

static DEVICE_ATTR(help,        S_IRUSR, pmt_show, NULL);
static DEVICE_ATTR(sw_dump,     S_IRUSR, pmt_show, NULL);
static DEVICE_ATTR(sw_clear,    S_IRUSR, pmt_show, NULL);
static DEVICE_ATTR(hw_regs,     S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(hw_write,    S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(hw_read,     S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(hw_dump,     S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(hw_dump_all, S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(hw_inv,      S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(hw_inv_all,  S_IWUSR, pmt_show, pmt_hw_store);
static DEVICE_ATTR(sw_word,     S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_rep_2b,    S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_rep_lsb,   S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_rep_msb,   S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_ip_csum,   S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_l4_csum,   S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_dec_lsb,   S_IWUSR, pmt_show, pmt_sw_dec_store);
static DEVICE_ATTR(s_dec_msb,   S_IWUSR, pmt_show, pmt_sw_dec_store);
static DEVICE_ATTR(s_add_2b,    S_IWUSR, pmt_show, pmt_sw_hex_store);
static DEVICE_ATTR(s_del,       S_IWUSR, pmt_show, pmt_sw_dec_store);
static DEVICE_ATTR(s_last,      S_IWUSR, pmt_show, pmt_sw_dec_store);
static DEVICE_ATTR(s_flags,     S_IWUSR, pmt_show, pmt_sw_dec_store);
static DEVICE_ATTR(s_skip,      S_IWUSR, pmt_show, pmt_sw_dec_store);
static DEVICE_ATTR(s_jump,      S_IWUSR, pmt_show, pmt_sw_dec_store);


static struct attribute *pmt_attrs[] = {
	&dev_attr_help.attr,
	&dev_attr_sw_dump.attr,
	&dev_attr_sw_clear.attr,
	&dev_attr_hw_regs.attr,
	&dev_attr_hw_write.attr,
	&dev_attr_hw_read.attr,
	&dev_attr_hw_dump.attr,
	&dev_attr_hw_dump_all.attr,
	&dev_attr_hw_inv.attr,
	&dev_attr_hw_inv_all.attr,
	&dev_attr_sw_word.attr,
	&dev_attr_s_rep_2b.attr,
	&dev_attr_s_add_2b.attr,
	&dev_attr_s_del.attr,
	&dev_attr_s_rep_lsb.attr,
	&dev_attr_s_rep_msb.attr,
	&dev_attr_s_ip_csum.attr,
	&dev_attr_s_l4_csum.attr,
	&dev_attr_s_dec_lsb.attr,
	&dev_attr_s_dec_msb.attr,
	&dev_attr_s_last.attr,
	&dev_attr_s_flags.attr,
	&dev_attr_s_skip.attr,
	&dev_attr_s_jump.attr,
	NULL
};

static struct attribute_group pmt_group = {
	.name = "pmt",
	.attrs = pmt_attrs,
};

int __devinit pmt_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, &pmt_group);
		if (err) {
			printk(KERN_INFO "sysfs group failed %d\n", err);
			goto out;
		}
out:
		return err;
}

module_init(pmt_sysfs_init);

MODULE_AUTHOR("Dima Epshtein");
MODULE_DESCRIPTION("PMT for Marvell NetA MV65xxx");
MODULE_LICENSE("GPL");