xref: /freebsd/sys/dev/rtwn/rtl8812a/usb/r12au_rx.c (revision 685dc743dc3b5645e34836464128e1c0558b404b)

/*-
 * Copyright (c) 2016 Andriy Voskoboinyk <avos@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#include "opt_wlan.h"

#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/linker.h>

#include <net/if.h>
#include <net/ethernet.h>
#include <net/if_media.h>

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_ratectl.h>

#include <dev/rtwn/if_rtwnvar.h>

#include <dev/rtwn/rtl8812a/r12a_fw_cmd.h>
#include <dev/rtwn/rtl8812a/r12a_rx_desc.h>

#include <dev/rtwn/rtl8812a/usb/r12au.h>

int
r12au_classify_intr(struct rtwn_softc *sc, void *buf, int len)
{
	struct r92c_rx_stat *stat = buf;
	uint32_t rxdw2 = le32toh(stat->rxdw2);

	if (rxdw2 & R12A_RXDW2_RPT_C2H) {
		int pos = sizeof(struct r92c_rx_stat);
		/* Check if Rx descriptor + command id/sequence fits. */
		if (len < pos + 2)	/* unknown, skip */
			return (RTWN_RX_DATA);

		if (((uint8_t *)buf)[pos] == R12A_C2H_TX_REPORT)
			return (RTWN_RX_TX_REPORT);
		else
			return (RTWN_RX_OTHER);
	} else
		return (RTWN_RX_DATA);
}

int
r12au_align_rx(int totlen, int len)
{
	if (totlen < len)
		return (roundup2(totlen, 8));

	return (totlen);
}