qcacmn: Add sg formation check

Add check for sg formation.
Only enable chfrag_cont and msdu_continuation if reo
error code is HAL_RX_WBM_ERR_SRC_REO or rxdma_err_code
is HAL_RXDMA_ERR_UNENCRYPTED.

Also chain all nbuf in case of sg in separate buffer
and finally loop through that. This is added because
sometime we dont get desc in sync with hw.
To avoid such mismatch, this buffer is added.
We will process nbuf only when all msdus has been
received.

Change-Id: I3b154a68955db61f3acaa0cb8d130c8918a3d450
CRs-Fixed: 2672126

dp/wifi3.0/dp_main.c

@@ -4109,6 +4109,9 @@ static void dp_soc_deinit(void *txrx_soc)
 
 	htt_soc_detach(htt_soc);
 
+	/* Free wbm sg list and reset flags in down path */
+	dp_rx_wbm_sg_list_deinit(soc);
+
 	wlan_minidump_remove(soc);
 }
 
@@ -10556,6 +10559,9 @@ dp_soc_attach(struct cdp_ctrl_objmgr_psoc *ctrl_psoc,
 	soc->osdev = qdf_osdev;
 	soc->num_hw_dscp_tid_map = HAL_MAX_HW_DSCP_TID_MAPS;
 
+	/* Reset wbm sg list and flags */
+	dp_rx_wbm_sg_list_reset(soc);
+
 	wlan_set_srng_cfg(&soc->wlan_srng_cfg);
 	soc->wlan_cfg_ctx = wlan_cfg_soc_attach(soc->ctrl_psoc);
 	if (!soc->wlan_cfg_ctx) {
@@ -10640,6 +10646,9 @@ void *dp_soc_init(struct dp_soc *soc, HTC_HANDLE htc_handle,
 
 	dp_soc_cfg_init(soc);
 
+	/* Reset/Initialize wbm sg list and flags */
+	dp_rx_wbm_sg_list_reset(soc);
+
 	/* Note: Any SRNG ring initialization should happen only after
 	 * Interrupt mode is set and followed by filling up the
 	 * interrupt mask. IT SHOULD ALWAYS BE IN THIS ORDER.