qcacmn: Add support for Direct Link refill ring

Add support and ops for initialization and
deinitialization of Direct Link refill ring.

Change-Id: I2c7018c4f8411fb7a590cfbb8b991f9152b22397
CRs-Fixed: 3316656

dp/wifi3.0/dp_htt.c

@@ -573,6 +573,13 @@ int htt_srng_setup(struct htt_soc *soc, int mac_id,
 			(lmac_id * HAL_MAX_RINGS_PER_LMAC))) {
 			htt_ring_id = HTT_RXDMA_HOST_BUF_RING;
 			htt_ring_type = HTT_SW_TO_HW_RING;
+#ifdef FEATURE_DIRECT_LINK
+		} else if (srng_params.ring_id ==
+			   (HAL_SRNG_WMAC1_RX_DIRECT_LINK_SW_REFILL_RING +
+			    (lmac_id * HAL_MAX_RINGS_PER_LMAC))) {
+			htt_ring_id = HTT_LPASS_TO_FW_RXBUF_RING;
+			htt_ring_type = HTT_SW_TO_SW_RING;
+#endif
 		} else {
 			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
 				   "%s: Ring %d currently not supported",

dp/wifi3.0/dp_internal.h

@@ -46,6 +46,19 @@
 
 #define INVALID_WBM_RING_NUM 0xF
 
+#ifdef FEATURE_DIRECT_LINK
+#define DIRECT_LINK_REFILL_RING_ENTRIES 64
+#ifdef IPA_OFFLOAD
+#ifdef IPA_WDI3_VLAN_SUPPORT
+#define DIRECT_LINK_REFILL_RING_IDX     4
+#else
+#define DIRECT_LINK_REFILL_RING_IDX     3
+#endif
+#else
+#define DIRECT_LINK_REFILL_RING_IDX     2
+#endif
+#endif
+
 /* struct htt_dbgfs_cfg - structure to maintain required htt data
  * @msg_word: htt msg sent to upper layer
  * @m: qdf debugfs file pointer
@@ -4256,4 +4269,40 @@ void dp_rx_err_send_pktlog(struct dp_soc *soc, struct dp_pdev *pdev,
  * return: None
  */
 void dp_pdev_update_fast_rx_flag(struct dp_soc *soc, struct dp_pdev *pdev);
+
+#ifdef FEATURE_DIRECT_LINK
+/*
+ * dp_setup_direct_link_refill_ring(): Setup direct link refill ring for pdev
+ * @soc_hdl: DP SOC handle
+ * @pdev_id: pdev id
+ *
+ * Return: Handle to SRNG
+ */
+struct dp_srng *dp_setup_direct_link_refill_ring(struct cdp_soc_t *soc_hdl,
+						 uint8_t pdev_id);
+
+/*
+ * dp_destroy_direct_link_refill_ring(): Destroy direct link refill ring for
+ *  pdev
+ * @soc_hdl: DP SOC handle
+ * @pdev_id: pdev id
+ *
+ * Return: None
+ */
+void dp_destroy_direct_link_refill_ring(struct cdp_soc_t *soc_hdl,
+					uint8_t pdev_id);
+#else
+static inline
+struct dp_srng *dp_setup_direct_link_refill_ring(struct cdp_soc_t *soc_hdl,
+						 uint8_t pdev_id)
+{
+	return NULL;
+}
+
+static inline
+void dp_destroy_direct_link_refill_ring(struct cdp_soc_t *soc_hdl,
+					uint8_t pdev_id)
+{
+}
+#endif
 #endif /* #ifndef _DP_INTERNAL_H_ */

dp/wifi3.0/dp_main.c

@@ -17157,3 +17157,54 @@ static QDF_STATUS dp_pdev_init_wifi3(struct cdp_soc_t *txrx_soc,
 	return dp_pdev_init(txrx_soc, htc_handle, qdf_osdev, pdev_id);
 }
 
+#ifdef FEATURE_DIRECT_LINK
+struct dp_srng *dp_setup_direct_link_refill_ring(struct cdp_soc_t *soc_hdl,
+						 uint8_t pdev_id)
+{
+	struct dp_soc *soc = cdp_soc_t_to_dp_soc(soc_hdl);
+	struct dp_pdev *pdev = dp_get_pdev_from_soc_pdev_id_wifi3(soc, pdev_id);
+
+	if (!pdev) {
+		dp_err("DP pdev is NULL");
+		return NULL;
+	}
+
+	if (dp_srng_alloc(soc, &pdev->rx_refill_buf_ring4,
+			  RXDMA_BUF, DIRECT_LINK_REFILL_RING_ENTRIES, false)) {
+		dp_err("SRNG alloc failed for rx_refill_buf_ring4");
+		return NULL;
+	}
+
+	if (dp_srng_init(soc, &pdev->rx_refill_buf_ring4,
+			 RXDMA_BUF, DIRECT_LINK_REFILL_RING_IDX, 0)) {
+		dp_err("SRNG init failed for rx_refill_buf_ring4");
+		dp_srng_free(soc, &pdev->rx_refill_buf_ring4);
+		return NULL;
+	}
+
+	if (htt_srng_setup(soc->htt_handle, pdev_id,
+			   pdev->rx_refill_buf_ring4.hal_srng, RXDMA_BUF)) {
+		dp_srng_deinit(soc, &pdev->rx_refill_buf_ring4, RXDMA_BUF,
+			       DIRECT_LINK_REFILL_RING_IDX);
+		dp_srng_free(soc, &pdev->rx_refill_buf_ring4);
+		return NULL;
+	}
+
+	return &pdev->rx_refill_buf_ring4;
+}
+
+void dp_destroy_direct_link_refill_ring(struct cdp_soc_t *soc_hdl,
+					uint8_t pdev_id)
+{
+	struct dp_soc *soc = cdp_soc_t_to_dp_soc(soc_hdl);
+	struct dp_pdev *pdev = dp_get_pdev_from_soc_pdev_id_wifi3(soc, pdev_id);
+
+	if (!pdev) {
+		dp_err("DP pdev is NULL");
+		return;
+	}
+
+	dp_srng_deinit(soc, &pdev->rx_refill_buf_ring4, RXDMA_BUF, 0);
+	dp_srng_free(soc, &pdev->rx_refill_buf_ring4);
+}
+#endif

dp/wifi3.0/dp_types.h

@@ -2948,6 +2948,11 @@ struct dp_pdev {
 	struct dp_srng rx_refill_buf_ring3;
 #endif
 
+#ifdef FEATURE_DIRECT_LINK
+	/* Fourth ring used to replenish rx buffers */
+	struct dp_srng rx_refill_buf_ring4;
+#endif
+
 	/* Empty ring used by firmware to post rx buffers to the MAC */
 	struct dp_srng rx_mac_buf_ring[MAX_RX_MAC_RINGS];
 

hal/wifi3.0/hal_internal.h

@@ -283,10 +283,11 @@ enum hal_srng_ring_id {
 	HAL_SRNG_WMAC1_SW2RXDMA0_BUF2,
 #ifdef IPA_WDI3_VLAN_SUPPORT
 	HAL_SRNG_WMAC1_SW2RXDMA0_BUF3,
+#endif
 #endif
 	HAL_SRNG_WMAC1_SW2RXDMA1_BUF,
-#else
-	HAL_SRNG_WMAC1_SW2RXDMA1_BUF,
+#ifdef FEATURE_DIRECT_LINK
+	HAL_SRNG_WMAC1_RX_DIRECT_LINK_SW_REFILL_RING,
 #endif
 	HAL_SRNG_WMAC1_SW2RXDMA2_BUF,
 	HAL_SRNG_WMAC1_SW2RXDMA0_STATBUF,

hal/wifi3.0/kiwi/hal_kiwi.c

@@ -2606,7 +2606,9 @@ struct hal_hw_srng_config hw_srng_table_kiwi[] = {
 	},
 	{ /* RXDMA_BUF */
 		.start_ring_id = HAL_SRNG_WMAC1_SW2RXDMA0_BUF0,
-#ifdef IPA_OFFLOAD
+#if defined(IPA_OFFLOAD) && defined(FEATURE_DIRECT_LINK)
+		.max_rings = 4,
+#elif defined(IPA_OFFLOAD) || defined(FEATURE_DIRECT_LINK)
 		.max_rings = 3,
 #else
 		.max_rings = 2,