8821cu-20210916/hal/rtl8821c/usb/rtl8821cu_recv.c

/******************************************************************************
 *
 * Copyright(c) 2016 - 2017 Realtek Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 *****************************************************************************/
#define _RTL8821CU_RECV_C_

#include <drv_types.h>			/* PADAPTER, rtw_xmit.h and etc. */
#include <hal_data.h>			/* HAL_DATA_TYPE */
#include "../../hal_halmac.h"		/* RX desc */
#include "../rtl8821c.h"		/* rtl8821c_query_rx_desc, rtl8821c_c2h_handler_no_io() */

int rtl8821cu_init_recv_priv(PADAPTER padapter)
{
	return usb_init_recv_priv(padapter, INTERRUPT_MSG_FORMAT_LEN);
}

void rtl8821cu_free_recv_priv(PADAPTER padapter)
{
	usb_free_recv_priv(padapter, INTERRUPT_MSG_FORMAT_LEN);
}

static u8 recvbuf2recvframe_proccess_normal_rx
(PADAPTER padapter, u8 *pbuf, struct rx_pkt_attrib *pattrib, union recv_frame *precvframe, _pkt *pskb)
{
	u8 ret = _SUCCESS;
	struct recv_priv *precvpriv = &padapter->recvpriv;
	_queue *pfree_recv_queue = &precvpriv->free_recv_queue;

#ifdef CONFIG_RX_PACKET_APPEND_FCS
	if (check_fwstate(&padapter->mlmepriv, WIFI_MONITOR_STATE) == _FALSE) {
		if (rtl8821c_rx_fcs_appended(padapter))
			pattrib->pkt_len -= IEEE80211_FCS_LEN;
	}
#endif

	if (rtw_os_alloc_recvframe(padapter, precvframe,
		(pbuf + pattrib->shift_sz + pattrib->drvinfo_sz + RXDESC_SIZE), pskb) == _FAIL) {

		rtw_free_recvframe(precvframe, pfree_recv_queue);
		ret = _FAIL;
		goto exit;
	}

	recvframe_put(precvframe, pattrib->pkt_len);

	pre_recv_entry(precvframe, pattrib->physt ? (pbuf + RXDESC_OFFSET) : NULL);

exit:
	return ret;
}

int recvbuf2recvframe(PADAPTER padapter, void *ptr)
{
	u8 *pbuf;
	u8 pkt_cnt = 0;
	u32 pkt_offset;
	s32 transfer_len;
	u8 *pphy_status = NULL;
	union recv_frame *precvframe = NULL;
	struct rx_pkt_attrib *pattrib = NULL;
	HAL_DATA_TYPE *pHalData = GET_HAL_DATA(padapter);
	struct recv_priv *precvpriv = &padapter->recvpriv;
	_queue *pfree_recv_queue = &precvpriv->free_recv_queue;
	_pkt *pskb;

#ifdef CONFIG_USE_USB_BUFFER_ALLOC_RX
	pskb = NULL;
	transfer_len = (s32)((struct recv_buf *)ptr)->transfer_len;
	pbuf = ((struct recv_buf *)ptr)->pbuf;
#else /* !CONFIG_USE_USB_BUFFER_ALLOC_RX */
	pskb = (_pkt *)ptr;
	transfer_len = (s32)pskb->len;
	pbuf = pskb->data;
#endif /* CONFIG_USE_USB_BUFFER_ALLOC_RX */


#ifdef CONFIG_USB_RX_AGGREGATION
	pkt_cnt = GET_RX_DESC_DMA_AGG_NUM_8821C(pbuf);
#endif

	do {
		precvframe = rtw_alloc_recvframe(pfree_recv_queue);
		if (precvframe == NULL) {
			/* RTW_INFO("%s()-%d: rtw_alloc_recvframe() failed! RX Drop!\n", __func__, __LINE__); */
			RTW_INFO("%s()-%d: rtw_alloc_recvframe() failed! RX Drop!\n", __func__, __LINE__);
			goto _exit_recvbuf2recvframe;
		}

		_rtw_init_listhead(&precvframe->u.hdr.list);
		precvframe->u.hdr.precvbuf = NULL;	/* can't access the precvbuf for new arch */
		precvframe->u.hdr.len = 0;

		rtl8821c_query_rx_desc(precvframe, pbuf);

		pattrib = &precvframe->u.hdr.attrib;

		if ((padapter->registrypriv.mp_mode == 0) && ((pattrib->crc_err) || (pattrib->icv_err))) {
			/* RTW_INFO("%s: RX Warning! crc_err=%d icv_err=%d, skip!\n", __func__, pattrib->crc_err, pattrib->icv_err); */
			RTW_INFO("%s: RX Warning! crc_err=%d icv_err=%d, skip!\n", __func__, pattrib->crc_err, pattrib->icv_err);

			rtw_free_recvframe(precvframe, pfree_recv_queue);
			goto _exit_recvbuf2recvframe;
		}

		pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz + pattrib->pkt_len;

		if ((pattrib->pkt_len <= 0) || (pkt_offset > transfer_len)) {
			/* RTW_INFO("%s()-%d: RX Warning!,pkt_len<=0(%d) or pkt_offset(%d)> transfer_len(%d)\n" */
			/*	, __func__, __LINE__, pattrib->pkt_len, pkt_offset, transfer_len); */
			RTW_INFO("%s()-%d: RX Warning!,pkt_len<=0(%d) or pkt_offset(%d)> transfer_len(%d)\n"
				, __func__, __LINE__, pattrib->pkt_len, pkt_offset, transfer_len);
			if (pkt_offset > transfer_len)
				/* RTW_INFO("%s()-%d: RX Warning!,RXDESC_SIZE(%d), drvinfo_sz(%d), shift_sz(%d),pkt_len(%d)\n" */
				/*	, __func__, __LINE__, RXDESC_SIZE, pattrib->drvinfo_sz, pattrib->shift_sz, pattrib->pkt_len); */
				RTW_INFO("%s()-%d: RX Warning!,RXDESC_SIZE(%d), drvinfo_sz(%d), shift_sz(%d),pkt_len(%d)\n"
					, __func__, __LINE__, RXDESC_SIZE, pattrib->drvinfo_sz, pattrib->shift_sz, pattrib->pkt_len);

			rtw_free_recvframe(precvframe, pfree_recv_queue);
			goto _exit_recvbuf2recvframe;
		}

		switch (pattrib->pkt_rpt_type) {
		case C2H_PACKET:
			c2h_pre_handler_rtl8821c(padapter, pbuf , transfer_len);
			/* C2H_PACKET doesn't use recvframe, so free it */
			rtw_free_recvframe(precvframe, pfree_recv_queue);
			break;
		case TX_REPORT1:
		case TX_REPORT2:
		case HIS_REPORT:
			/* RTW_INFO("%s: [WARNNING] RX type(%d) not be handled!\n", __func__, pattrib->pkt_rpt_type); */
			RTW_INFO("%s: [WARNNING] RX type(%d) not be handled!\n", __func__, pattrib->pkt_rpt_type);
			rtw_free_recvframe(precvframe, pfree_recv_queue);
			break;
		case NORMAL_RX:
		default:
			if (recvbuf2recvframe_proccess_normal_rx(padapter, pbuf, pattrib, precvframe, pskb) == _FAIL)
				goto _exit_recvbuf2recvframe;
			break;
		}

#ifdef CONFIG_USB_RX_AGGREGATION
		/* jaguar 8-byte alignment */
		pkt_offset = (u16)_RND8(pkt_offset);
		pkt_cnt--;
		pbuf += pkt_offset;
#endif
		transfer_len -= pkt_offset;
		precvframe = NULL;

	} while (transfer_len > 0);

_exit_recvbuf2recvframe:

	return _SUCCESS;
}