linux/drivers/net/wireless/ath/ath6kl/testmode.c

/*
 * Copyright (c) 2010-2011 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "testmode.h"

#include <net/netlink.h>

enum ath6kl_tm_attr {
	__ATH6KL_TM_ATTR_INVALID	= 0,
	ATH6KL_TM_ATTR_CMD		= 1,
	ATH6KL_TM_ATTR_DATA		= 2,

	/* keep last */
	__ATH6KL_TM_ATTR_AFTER_LAST,
	ATH6KL_TM_ATTR_MAX		= __ATH6KL_TM_ATTR_AFTER_LAST - 1,
};

enum ath6kl_tm_cmd {
	ATH6KL_TM_CMD_TCMD		= 0,
	ATH6KL_TM_CMD_RX_REPORT		= 1,
};

#define ATH6KL_TM_DATA_MAX_LEN		5000

static const struct nla_policy ath6kl_tm_policy[ATH6KL_TM_ATTR_MAX + 1] = {
	[ATH6KL_TM_ATTR_CMD]		= { .type = NLA_U32 },
	[ATH6KL_TM_ATTR_DATA]		= { .type = NLA_BINARY,
					    .len = ATH6KL_TM_DATA_MAX_LEN },
};

void ath6kl_tm_rx_report_event(struct ath6kl *ar, void *buf, size_t buf_len)
{
	if (down_interruptible(&ar->sem))
		return;

	kfree(ar->tm.rx_report);

	ar->tm.rx_report = kmemdup(buf, buf_len, GFP_KERNEL);
	ar->tm.rx_report_len = buf_len;

	up(&ar->sem);

	wake_up(&ar->event_wq);
}

static int ath6kl_tm_rx_report(struct ath6kl *ar, void *buf, size_t buf_len,
			       struct sk_buff *skb)
{
	int ret = 0;
	long left;

	if (down_interruptible(&ar->sem))
		return -ERESTARTSYS;

	if (!test_bit(WMI_READY, &ar->flag)) {
		ret = -EIO;
		goto out;
	}

	if (test_bit(DESTROY_IN_PROGRESS, &ar->flag)) {
		ret = -EBUSY;
		goto out;
	}

	if (ath6kl_wmi_test_cmd(ar->wmi, buf, buf_len) < 0) {
		up(&ar->sem);
		return -EIO;
	}

	left = wait_event_interruptible_timeout(ar->event_wq,
						ar->tm.rx_report != NULL,
						WMI_TIMEOUT);

	if (left == 0) {
		ret = -ETIMEDOUT;
		goto out;
	} else if (left < 0) {
		ret = left;
		goto out;
	}

	if (ar->tm.rx_report == NULL || ar->tm.rx_report_len == 0) {
		ret = -EINVAL;
		goto out;
	}

	NLA_PUT(skb, ATH6KL_TM_ATTR_DATA, ar->tm.rx_report_len,
		ar->tm.rx_report);

	kfree(ar->tm.rx_report);
	ar->tm.rx_report = NULL;

out:
	up(&ar->sem);

	return ret;

nla_put_failure:
	ret = -ENOBUFS;
	goto out;
}

int ath6kl_tm_cmd(struct wiphy *wiphy, void *data, int len)
{
	struct ath6kl *ar = wiphy_priv(wiphy);
	struct nlattr *tb[ATH6KL_TM_ATTR_MAX + 1];
	int err, buf_len, reply_len;
	struct sk_buff *skb;
	void *buf;

	err = nla_parse(tb, ATH6KL_TM_ATTR_MAX, data, len,
			ath6kl_tm_policy);
	if (err)
		return err;

	if (!tb[ATH6KL_TM_ATTR_CMD])
		return -EINVAL;

	switch (nla_get_u32(tb[ATH6KL_TM_ATTR_CMD])) {
	case ATH6KL_TM_CMD_TCMD:
		if (!tb[ATH6KL_TM_ATTR_DATA])
			return -EINVAL;

		buf = nla_data(tb[ATH6KL_TM_ATTR_DATA]);
		buf_len = nla_len(tb[ATH6KL_TM_ATTR_DATA]);

		ath6kl_wmi_test_cmd(ar->wmi, buf, buf_len);

		return 0;

		break;
	case ATH6KL_TM_CMD_RX_REPORT:
		if (!tb[ATH6KL_TM_ATTR_DATA])
			return -EINVAL;

		buf = nla_data(tb[ATH6KL_TM_ATTR_DATA]);
		buf_len = nla_len(tb[ATH6KL_TM_ATTR_DATA]);

		reply_len = nla_total_size(ATH6KL_TM_DATA_MAX_LEN);
		skb = cfg80211_testmode_alloc_reply_skb(wiphy, reply_len);
		if (!skb)
			return -ENOMEM;

		err = ath6kl_tm_rx_report(ar, buf, buf_len, skb);
		if (err < 0) {
			kfree_skb(skb);
			return err;
		}

		return cfg80211_testmode_reply(skb);
	default:
		return -EOPNOTSUPP;
	}
}