openwrt/package/kernel/lantiq/vrx518_tc/patches/200-swplat.patch

The existing software receive and transmit path does not actually work.
This replaces it by a basic working implementation.

--- a/dcdp/atm_tc.c
+++ b/dcdp/atm_tc.c
@@ -603,7 +603,11 @@ static void atm_aca_init(struct atm_priv
 	cfg = &priv->tc_priv->cfg;
 
 	txin = &param.aca_txin;
+#if defined(__LITTLE_ENDIAN)
+	txin->byteswap = 0;
+#else
 	txin->byteswap = 1;
+#endif
 	txin->hd_size_in_dw = cfg->txin.soc_desc_dwsz;
 	txin->pd_desc_base = SB_XBAR_ADDR(__ACA_TX_IN_PD_LIST_BASE);
 	txin->pd_desc_num = __ACA_TX_IN_PD_LIST_NUM;
@@ -625,7 +629,11 @@ static void atm_aca_init(struct atm_priv
 		txin->soc_cmlt_cnt_addr);
 
 	txout = &param.aca_txout;
+#if defined(__LITTLE_ENDIAN)
+	txout->byteswap = 0;
+#else
 	txout->byteswap = 1;
+#endif
 	txout->hd_size_in_dw = cfg->txout.soc_desc_dwsz;
 	txout->pd_desc_base = SB_XBAR_ADDR(__ACA_TX_OUT_PD_LIST_BASE);
 	txout->pd_desc_num = __ACA_TX_OUT_PD_LIST_NUM;
@@ -647,7 +655,11 @@ static void atm_aca_init(struct atm_priv
 		txout->soc_cmlt_cnt_addr);
 
 	rxout = &param.aca_rxout;
+#if defined(__LITTLE_ENDIAN)
+	rxout->byteswap = 0;
+#else
 	rxout->byteswap = 1;
+#endif
 	rxout->hd_size_in_dw = cfg->rxout.soc_desc_dwsz;
 	rxout->pd_desc_base = SB_XBAR_ADDR(__ACA_RX_OUT_PD_LIST_BASE);
 	rxout->pd_desc_num = __ACA_RX_OUT_PD_LIST_NUM;
@@ -669,7 +681,11 @@ static void atm_aca_init(struct atm_priv
 		rxout->soc_cmlt_cnt_addr);
 
 	rxin = &param.aca_rxin;
+#if defined(__LITTLE_ENDIAN)
+	rxin->byteswap = 0;
+#else
 	rxin->byteswap = 1;
+#endif
 	rxin->hd_size_in_dw = cfg->rxin.soc_desc_dwsz;
 	rxin->pd_desc_base = SB_XBAR_ADDR(__RX_IN_PD_DES_LIST_BASE);
 	rxin->pd_desc_num = __ACA_RX_IN_PD_LIST_NUM;
@@ -1261,7 +1277,7 @@ static int ppe_ioctl(struct atm_dev *dev
 static int ppe_send(struct atm_vcc *vcc, struct sk_buff *skb)
 {
 	int ret, qid, mpoa_pt, mpoa_type, vid;
-	unsigned int prio, conn;
+	unsigned int prio, conn, len;
 	struct atm_priv *priv;
 
 	if (!vcc) {
@@ -1327,12 +1343,14 @@ static int ppe_send(struct atm_vcc *vcc,
 	tc_dbg(priv->tc_priv, MSG_TX, "vid: 0x%x, qid: 0x%x\n",
 			vid, qid);
 
+	len = skb->len;
+
 	if (priv->tc_priv->tc_ops.send(NULL,
 			skb, qid, ATM_SL_PKT) == 0) {
 		priv->stats.aal5_tx_pkts++;
-		priv->stats.aal5_tx_bytes += skb->len;
+		priv->stats.aal5_tx_bytes += len;
 		priv->conn[conn].stats.aal5_tx_pkts++;
-		priv->conn[conn].stats.aal5_tx_bytes += skb->len;
+		priv->conn[conn].stats.aal5_tx_bytes += len;
 		priv->conn[conn].prio_tx_packets[prio]++;
 	} else {
 		tc_dbg(priv->tc_priv, MSG_TX, "ATM: TX fail\n");
--- a/dcdp/ptm_tc.c
+++ b/dcdp/ptm_tc.c
@@ -506,6 +506,7 @@ static int ptm_xmit(struct sk_buff *skb,
 	struct ptm_priv *ptm_tc = netdev_priv(dev);
 	int qid;
 	enum tc_pkt_type type;
+	unsigned int len;
 
 	if (!showtime_stat(ptm_tc->tc_priv))
 		goto PTM_XMIT_DROP;
@@ -519,11 +520,13 @@ static int ptm_xmit(struct sk_buff *skb,
 	type = ptm_tc->tc_priv->tc_mode == TC_PTM_BND_MODE
 		? PTM_BOND_PKT : PTM_SL_PKT;
 
+	len = skb->len;
+
 	if (ptm_tc->tc_priv->tc_ops.send(dev, skb, qid, type) < 0)
 		ptm_tc->stats64.tx_dropped++;
 	else {
 		ptm_tc->stats64.tx_packets++;
-		ptm_tc->stats64.tx_bytes += skb->len;
+		ptm_tc->stats64.tx_bytes += len;
 	}
 
 	return 0;
@@ -640,7 +643,7 @@ static int ptm_dev_init(struct tc_priv *
 	const char macaddr[ETH_ALEN]
 		= {0xAC, 0x9A, 0x96, 0x11, 0x22, 0x33};
 
-	dev = alloc_netdev_mq(sizeof(*ptm_tc), "dsl%d",  NET_NAME_ENUM, ptm_setup, 4);
+	dev = alloc_netdev(sizeof(*ptm_tc), "dsl%d",  NET_NAME_ENUM, ptm_setup);
 	if (!dev) {
 		tc_dbg(tc_priv, MSG_INIT, "Cannot alloc net device\n");
 		return -ENOMEM;
@@ -2337,7 +2340,11 @@ static void ptm_aca_init(struct ptm_ep_p
 	cfg = &priv->tc_priv->cfg;
 
 	txin = &param.aca_txin;
+#if defined(__LITTLE_ENDIAN)
+	txin->byteswap = 0;
+#else
 	txin->byteswap = 1;
+#endif
 	txin->hd_size_in_dw = cfg->txin.soc_desc_dwsz;
 	txin->pd_desc_base = SB_XBAR_ADDR(__ACA_TX_IN_PD_LIST_BASE);
 	txin->pd_desc_num = __ACA_TX_IN_PD_LIST_NUM;
@@ -2360,7 +2367,11 @@ static void ptm_aca_init(struct ptm_ep_p
 		txin->soc_cmlt_cnt_addr);
 
 	txout = &param.aca_txout;
+#if defined(__LITTLE_ENDIAN)
+	txout->byteswap = 0;
+#else
 	txout->byteswap = 1;
+#endif
 	txout->hd_size_in_dw = cfg->txout.soc_desc_dwsz;
 	if (priv->tc_priv->param.cdma_desc_loc == LOC_IN_FPI)
 		txout->pd_desc_base = sb_r32(__TX_OUT_SHADOW_PTR) - phybase;
@@ -2386,7 +2397,11 @@ static void ptm_aca_init(struct ptm_ep_p
 		txout->soc_cmlt_cnt_addr);
 
 	rxout = &param.aca_rxout;
+#if defined(__LITTLE_ENDIAN)
+	rxout->byteswap = 0;
+#else
 	rxout->byteswap = 1;
+#endif
 	rxout->hd_size_in_dw = cfg->rxout.soc_desc_dwsz;
 	if (priv->tc_priv->param.cdma_desc_loc == LOC_IN_FPI)
 		rxout->pd_desc_base = sb_r32(__RX_OUT_SHADOW_PTR) - phybase;
@@ -2412,7 +2427,11 @@ static void ptm_aca_init(struct ptm_ep_p
 		rxout->soc_cmlt_cnt_addr);
 
 	rxin = &param.aca_rxin;
+#if defined(__LITTLE_ENDIAN)
+	rxin->byteswap = 0;
+#else
 	rxin->byteswap = 1;
+#endif
 	rxin->hd_size_in_dw = cfg->rxin.soc_desc_dwsz;
 	rxin->pd_desc_base = SB_XBAR_ADDR(__RX_IN_PD_DES_LIST_BASE);
 	rxin->pd_desc_num = __ACA_RX_IN_PD_LIST_NUM;
--- a/dcdp/platform/sw_plat.c
+++ b/dcdp/platform/sw_plat.c
@@ -36,10 +36,13 @@
 #include <linux/printk.h>
 #include <linux/etherdevice.h>
 #include <linux/workqueue.h>
-#include "inc/dsl_tc.h"
+#include "../inc/dsl_tc.h"
 
 #include "../inc/tc_main.h"
 #include "../inc/reg_addr.h"
+#include "../inc/tc_common.h"
+
+#include "../inc/fw/vrx518_addr_def.h"
 
 
 #define PMAC_SIZE		8
@@ -70,7 +73,7 @@ enum {
 #define TXIN_DNUM  	128
 #define TXOUT_DNUM	128
 #define RXOUT_DNUM	1024
-#define RXIN_DNUM	1024
+#define RXIN_DNUM	0
 
 #define TXIN_CHECK_NUM	32
 
@@ -80,22 +83,32 @@ struct aca_ring {
 	void *umt_dst;
 	u32 umt_phydst;
 	u32 dnum;
+	u32 dsize;
 	int idx; /* SoC RX/TX index */
-	int cnt;
-	void *cnt_addr;
-	u32 cnt_phyaddr;
 	int ep_dev_idx;
 };
 
+struct tx_list_item {
+	size_t len;
+	void *buf;
+	dma_addr_t phyaddr;
+};
+
+struct tx_list {
+	struct tx_list_item *data;
+	u32 dnum;
+};
+
 struct aca_ring_grp {
 	struct aca_ring rxin;
 	struct aca_ring txin;
 	struct aca_ring rxout;
 	struct aca_ring txout;
+	struct tx_list txlist;
 };
 
-#if 1
-struct dma_desc {
+#if defined(__LITTLE_ENDIAN)
+struct dma_tx_desc {
 	/* DW 0 */
 	u32 qid;
 	/* DW 1 */
@@ -112,8 +125,26 @@ struct dma_desc {
 	u32 c:1;
 	u32 own:1;
 }__packed;
+
+struct dma_rx_desc {
+	/* DW 0 */
+	u32 qid;
+	/* DW 1 */
+	u32 res2;
+	/* DW 2 */
+	u32 data_len:16;
+	u32 res0:7;
+	u32 byte_off:3;
+	u32 res1:2;
+	u32 eop:1;
+	u32 sop:1;
+	u32 c:1;
+	u32 own:1;
+	/* DW 3 */
+	u32 data_ptr;
+}__packed;
 #else
-struct dma_desc {
+struct dma_tx_desc {
 	/* DW 0 */
 	u32 qid;
 	/* DW 1 */
@@ -131,14 +162,25 @@ struct dma_desc {
 	u32 data_len:16;
 }__packed;
 
+struct dma_rx_desc {
+	/* DW 0 */
+	u32 qid;
+	/* DW 1 */
+	u32 res;
+	/* DW 2 */
+	u32 own:1;
+	u32 c:1;
+	u32 sop:1;
+	u32 eop:1;
+	u32 res1:2;
+	u32 byte_off:3;
+	u32 res0:7;
+	u32 data_len:16;
+	/* DW 3 */
+	u32 data_ptr;
+}__packed;
 #endif
 
-struct plat_dma {
-	u32 chan; /* CHAN IID */
-	u32 dma_chan; /* CONTROLLER/PORT/CHAN ID */
-	u32 ds_dnum; /* DS descriptor number */
-};
-
 struct plat_umt {
 	u32 id;
 	u32 cbm_id;
@@ -152,28 +194,28 @@ struct tc_req {
 	enum dsl_tc_mode tc_mode;
 };
 
-#if 0
-struct tc_coc {
-	enum ltq_cpufreq_state coc_stat;
-	struct tasklet_struct coc_task;
+struct mem_map_entry {
+	dma_addr_t phyaddr;
+	void *mem;
+	size_t size;
+	struct hlist_node node;
 };
-#endif
 
 struct plat_priv {
 	struct tc_priv *tc_priv;
 	struct plat_umt umt[EP_MAX_NUM];
-	struct plat_dma dma[EP_MAX_NUM];
 	struct ltq_mei_atm_showtime_info dsl_ops;
 	struct tc_req req_work;
 	struct aca_ring_grp soc_rings;
-	/* struct tc_coc coc;*/
+	struct net_device *netdev;
+	DECLARE_HASHTABLE(mem_map, 8);
 };
 
 static struct plat_priv *g_plat_priv;
 struct tasklet_struct txout_task;
 struct tasklet_struct rxout_task;
 
-static void txout_action(struct tc_priv *priv, struct aca_ring *txout);
+static DEFINE_SPINLOCK(tx_spinlock);
 
 void *ppa_callback_get(e_ltq_mei_cb_type type)
 {
@@ -259,122 +301,65 @@ static inline struct tc_priv *plat_to_tc
 	return g_plat_priv->tc_priv;
 }
 
-static int32_t plat_rx(struct net_device *rxdev, struct net_device *txdev,
-	struct sk_buff *skb, int32_t len)
-{
-	int32_t err;
-	struct tc_priv *tc_priv = plat_to_tcpriv();
-
-	if (unlikely(!rxdev)) {
-		if (txdev != NULL)
-			tc_dbg(tc_priv, MSG_RX,
-				"Recv undelivered packet from DP lib\n");
-		else
-			tc_dbg(tc_priv, MSG_RX, "Recv unknown packet\n");
-		err = -ENODEV;
-		goto err1;
-	}
-
-	tc_priv->tc_ops.recv(rxdev, skb);
-	return 0;
-
-err1:
-	dev_kfree_skb_any(skb);
-
-	return err;
-}
-
-#if 0
-static int32_t plat_get_subifid(struct net_device *dev, struct sk_buff *skb,
-	void *subif_data, uint8_t dst_mac[MAX_ETH_ALEN],
-	dp_subif_t *subif, uint32_t flags)
-{
-	int qid;
-	struct tc_priv *priv = plat_to_tcpriv();
-
-	qid = priv->tc_ops.get_qid(dev, skb, subif_data, flags);
-	if (qid < 0)
-		return qid;
-	else
-		subif->subif = qid;
-
-	return 0;
-}
-#endif
-
-#if 0
-static void plat_coc_tasklet(unsigned long arg)
-{
-	/* change state to D0 */
-	if (g_plat_priv->coc.coc_stat == LTQ_CPUFREQ_PS_D0)
-		return;
-
-	g_plat_priv->coc.coc_stat = LTQ_CPUFREQ_PS_D0;
-}
-
-static void plat_coc_req(void)
-{
-	tasklet_schedule(&g_plat_priv->coc.coc_task);
-}
+static void *plat_mem_alloc(size_t size, enum tc_dir dir, u32 *phyaddr);
+static void *plat_mem_virt(u32 phyaddr);
+static void plat_mem_free(u32 phyaddr, enum tc_dir dir);
 
+static void txlist_free(struct tx_list *list);
 
-static int32_t plat_coc_stat(enum ltq_cpufreq_state new_state,
-	enum ltq_cpufreq_state old_state, uint32_t flags)
+static int txlist_init(struct tx_list *list, u32 dnum)
 {
-	struct tc_priv *priv = plat_to_tcpriv();
-	tc_dbg(priv, MSG_COC,
-		"COC current state: %d, new state: %d, old state: %d\n",
-		g_plat_priv->coc.coc_stat, new_state, old_state);
+	struct tx_list_item *item;
+	int i;
 
-	if (g_plat_priv->coc.coc_stat != new_state) {
-		g_plat_priv->coc.coc_stat = new_state;
+	list->dnum = dnum;
 
-		if (new_state == LTQ_CPUFREQ_PS_D3) {
-			/* Enable interrupt for DS packet */
-			priv->tc_ops.irq_on(MBOX_PKT_RX);
-		} else {
-			/* Disable interrupt for DS packet */
-			priv->tc_ops.irq_off(MBOX_PKT_RX);
+	list->data = kcalloc(dnum, sizeof(struct tx_list_item), GFP_KERNEL);
+	if (!list->data) {
+		pr_err("Failed to allocate TX list!\n");
+		goto err;
+	}
+
+	for (i = 0; i < list->dnum; i++) {
+		item = &list->data[i];
+
+		// use plat_mem_alloc as these buffers will be mixed with buffers allocated in ptm_tc.c / atm_tc.c
+		item->buf = plat_mem_alloc(DMA_PACKET_SZ, US_DIR, &item->phyaddr);
+		if (!item->buf) {
+			pr_err("Failed to allocate TX buffer!\n");
+			goto err;
 		}
 	}
 
 	return 0;
-}
-#endif
-
-static inline int ring_dist(int idx1, int idx2, int size)
-{
-	if (idx1 >= idx2)
-		return (idx1 - idx2);
-	else
-		return (idx1 + size - idx2);
-}
 
-static inline int __ring_full(int idx, int cnt, u32 dnum)
-{
-	if (ring_dist(idx, cnt, dnum) < dnum - 1)
-		return 0;
-	else
-		return 1;
+err:
+	txlist_free(list);
+	return -1;
 }
 
-static inline int ring_full(struct aca_ring *ring)
+static void txlist_free(struct tx_list *list)
 {
-	if (!__ring_full(ring->idx, ring->cnt, ring->dnum))
-		return 0;
+	struct tx_list_item *item;
+	int i;
 
-	/* if ring full, update cumulative counter and check again */
-	ring->cnt = readl(ring->cnt_addr) % ring->dnum;
+	if (list->data) {
+		for (i = 0; i < list->dnum; i++) {
+			item = &list->data[i];
+
+			if (item->buf) {
+				// use plat_mem_free as these buffers are mixed with buffers allocated in ptm_tc.c / atm_tc.c
+				plat_mem_free(item->phyaddr, US_DIR);
+			}
+		}
+	}
 
-	return __ring_full(ring->idx, ring->cnt, ring->dnum);
+	kfree(list->data);
 }
 
-#define ring_idx_inc(ring, idx)						\
-	do { ring->idx = (ring->idx + 1) % ring->dnum; } while (0);
-
-static inline void ring_cnt_update(struct aca_ring *ring)
+static inline void ring_idx_inc(struct aca_ring *ring)
 {
-	ring->cnt = readl(ring->cnt_addr) % ring->dnum;
+	ring->idx = (ring->idx + 1) % ring->dnum;
 }
 
 static struct sk_buff *txin_skb_prepare(struct sk_buff *skb)
@@ -399,252 +384,220 @@ static struct sk_buff *txin_skb_prepare(
 	return nskb;
 }
 
-static int ring_mmap(void *mem, int size,
-	enum dma_data_direction dir, u32 *addr)
-{
-	struct device *pdev;
-	dma_addr_t phy_addr;
-	struct tc_priv *priv;
-	u32 addr1;
-
-	priv = g_plat_priv->tc_priv;
-	pdev = priv->ep_dev[0].dev;
-
-	phy_addr = dma_map_single(pdev, mem, size, dir);
-	if (unlikely(dma_mapping_error(pdev, phy_addr))) {
-		tc_err(priv, MSG_INIT,
-			"DMA address mapping error: buf: 0x%x, size: %d, dir: %d\n",
-			(u32)mem, size, dir);
-		return -ENOMEM;
-	}
-	dma_unmap_single(pdev, phy_addr, size, dir);
-
-	pr_info("vaddr: 0x%x, phyaddr: 0x%lx\n", (u32)mem, phy_addr);
-	addr1 = (u32)phy_addr;
-
-	if (addr)
-		*addr = addr1;
-
-	return 0;
-}
-
-static void txin_action(struct tc_priv *priv, struct aca_ring *txin,
+static int txin_action(struct tc_priv *priv, struct aca_ring *txin,
 		struct sk_buff *skb, int qid, enum tc_pkt_type type)
 {
-	struct dma_desc *desc, desc1;
-	u32 phyaddr, *dst, *src;
-	int i;
+	struct device *pdev = priv->ep_dev[0].dev;
+	struct aca_ring *txout = &g_plat_priv->soc_rings.txout;
+	struct tx_list *txlist = &g_plat_priv->soc_rings.txlist;
+	struct dma_tx_desc *desc;
+	struct tx_list_item *txlist_item;
+	unsigned long flags;
+
+	if (!g_plat_priv->netdev) {
+		spin_lock_irqsave(&tx_spinlock, flags);
+	}
 
-	if (ring_full(txin)) {
-		tc_dbg(priv, MSG_TX,
-			"TXIN Ring Full!: idx: %d, cnt: %d\n",
-			txin->idx, txin->cnt);
+	if ((txin->idx + 2) % txin->dnum == txout->idx) {
+		if (g_plat_priv->netdev) {
+			netif_stop_queue(g_plat_priv->netdev);
+		}
+	} else if ((txin->idx + 1) % txin->dnum == txout->idx) {
+		tc_err(priv, MSG_TX, "TXIN ring full: txin: %d, txout: %d\n",
+			txin->idx, txout->idx);
 		goto err1;
 	}
 
+	desc = (struct dma_tx_desc *)txin->dbase_mem;
+	desc += txin->idx;
+
+	txlist_item = &txlist->data[txin->idx];
+
 	skb = txin_skb_prepare(skb);
 	if (!skb)
-		return;
+		goto err2;
 
-	if (ring_mmap(skb->data, skb->len, DMA_TO_DEVICE, &phyaddr) < 0) {
-		tc_err(priv, MSG_TX, "TXIN data mmap failed: 0x%x\n",
-			(unsigned int)skb->data);
-		goto err1;
-	}
+	/*
+	 * Copy the data to a buffer in the driver. This is necessary because there doesn't seem to be a timely signal
+	 * from the device when it has consumed a buffer, which would allow to safely free it. The data_ptr is only
+	 * returned in TXOUT after another fixed number of packets (depending on the size of internal buffers) has been
+	 * transmitted, which may not happen in the near future. Making a copy allows to free the SKB here.
+	 */
+	memcpy(txlist_item->buf, skb->data, skb->len);
 
-	/* init a new descriptor for the new skb */
-	desc = (struct dma_desc *)txin->dbase_mem;
-	desc += txin->idx;
+	dma_sync_single_range_for_device(pdev, txlist_item->phyaddr, 0, skb->len, DMA_TO_DEVICE);
 
-	memset(desc, 0, sizeof(*desc));
-	memset(&desc1, 0, sizeof(desc1));
-	desc1.own = 1;
-	desc1.c = 1;
-	desc1.sop = 1;
-	desc1.eop = 1;
-	desc1.byte_off = phyaddr & 0x7;
-	desc1.data_len = skb->len;
-
-	desc1.data_ptr = phyaddr & (~(0x7));
-	desc1.qid = qid;
-
-	dst = (u32 *)desc;
-	src = (u32 *)&desc1;
-	for (i = 0; i < DW_SZ(desc1); i++)
-		dst[i] = cpu_to_be32(src[i]);
-
-	pr_info("txin idx: %d\n", txin->idx);
-	pr_info("descriptor dst val:(DW0-DW3): 0x%x, 0x%x, 0x%x, 0x%x\n",
-		dst[0], dst[1], dst[2], dst[3]);
-	pr_info("descriptor src val: (DW0-DW3): 0x%x, 0x%x, 0x%x, 0x%x\n",
-		src[0], src[1], src[2], src[3]);
-
-	if (ring_mmap(desc, sizeof(*desc), DMA_TO_DEVICE, NULL) < 0) {
-		tc_err(priv, MSG_TX, "TXIN descriptor mmap failed: 0x%x\n",
-			(unsigned int)desc);
+	// this should never happen, the buffers are already aligned by kmalloc
+	if (WARN_ON((txlist_item->phyaddr & 0x7) != 0))
 		goto err1;
+
+	if (g_plat_priv->netdev) {
+		netdev_sent_queue(g_plat_priv->netdev, skb->len);
 	}
+	txlist_item->len = skb->len;
+
+	memset(desc, 0, sizeof(*desc));
 
-	ring_idx_inc(txin, idx);
+	desc->data_ptr = txlist_item->phyaddr;
+	desc->byte_off = 0;
+	desc->data_len = skb->len;
+	desc->qid = qid;
+
+	desc->sop = 1;
+	desc->eop = 1;
+	desc->c = 0;
+	desc->own = 1;
+
+	dev_consume_skb_any(skb);
+
+	ring_idx_inc(txin);
 
 	/* update TXIN UMT by 1 */
 	writel(1, txin->umt_dst);
-	pr_info("TXIN send txin packet 1 packet\n");
 
-	/* Free skb */
-	dev_kfree_skb_any(skb);
+	if (!g_plat_priv->netdev) {
+		spin_unlock_irqrestore(&tx_spinlock, flags);
+	}
 
-	/* check txout for testing*/
-	//txout_action(plat_to_tcpriv(), &g_plat_priv->soc_rings.txout);
-	return;
+	return 0;
 
 err1:
-	//skb->delay_free = 0;
 	dev_kfree_skb_any(skb);
+
+err2:
+	if (!g_plat_priv->netdev) {
+		spin_unlock_irqrestore(&tx_spinlock, flags);
+	}
+
+	return -1;
 }
 
 static void txout_action(struct tc_priv *priv, struct aca_ring *txout)
 {
-	int i, cnt;
-	struct dma_desc *desc;
-	u32 ptr;
-	void *mem;
-
-	ring_cnt_update(txout);
-	cnt = ring_dist(txout->idx, txout->cnt, txout->dnum);
+	struct aca_ring *txin = &g_plat_priv->soc_rings.txin;
+	struct tx_list *txlist = &g_plat_priv->soc_rings.txlist;
+	struct tx_list_item *txlist_item;
+	int i, cnt, bytes;
+	u32 *desc;
+	unsigned long flags;
+
+	cnt = 0;
+	bytes = 0;
+
+	if (g_plat_priv->netdev) {
+		netif_tx_lock(g_plat_priv->netdev);
+	} else {
+		spin_lock_irqsave(&tx_spinlock, flags);
+	}
 
-	for (i = 0; i < cnt; i++) {
+	for (i = 0; i < txout->dnum; i++) {
 		desc = txout->dbase_mem;
 		desc += txout->idx;
-		/* read from memory */
-		if (ring_mmap(desc, sizeof(*desc), DMA_FROM_DEVICE, NULL) < 0) {
-			tc_err(priv, MSG_TX,
-				"map TXOUT DMA descriptor failed\n");
-			continue;
+
+		// *desc seems to be a pointer to a QoSQ buffer or the data_ptr of some previously sent packet
+		if (*desc == 0) {
+			break;
 		}
-		ptr = desc->data_ptr + desc->byte_off;
-		mem = (void * __force)__va(ptr);
-		kfree(mem);
-		ring_idx_inc(txout, idx);
-	}
 
-	if (cnt)
-		writel(cnt, txout->umt_dst);
-	pr_info("TXOUT received %d descriptors\n", cnt);
-}
+		if (txout->idx == txin->idx) {
+			tc_err(priv, MSG_TX, "TXOUT unexpected non-zero descriptor: txin: %d, txout: %d\n",
+				txin->idx, txout->idx);
+			break;
+		}
 
-static void rxin_action(struct tc_priv *priv,
-		struct aca_ring *rxin, int size, int cnt)
-{
-	int i, dist;
-	struct dma_desc *desc;
-	void *data_ptr;
-	u32 phyaddr;
-
-	if (ring_full(rxin)) {
-		tc_dbg(priv, MSG_RX,
-			"RXIN Ring Full!: idx: %d, cnt: %d\n",
-			rxin->idx, rxin->cnt);
-		return;
-	}
+		txlist_item = &txlist->data[txout->idx];
 
-	dist = ring_dist(rxin->idx, rxin->cnt, rxin->dnum);
-	if (cnt > dist) {
-		WARN_ONCE(1, "RXIN NO enough room for free buffers: free: %d, room: %d\n",
-			cnt, dist);
-		cnt = dist;
+		cnt++;
+		bytes += txlist_item->len;
+
+		/*
+		 * Reuse the returned buffer. The previous buffer should still be referenced by another descriptor.
+		 * When the driver is unloaded, all buffers in the txlist as well as those referenced by the
+		 * descriptors managed in ptm_tc.c or atm_tc.c will be freed.
+		 */
+		txlist_item->buf = plat_mem_virt(*desc);
+		txlist_item->phyaddr = *desc;
+
+		*desc = 0;
+
+		ring_idx_inc(txout);
 	}
 
-	for (i = 0; i < cnt; i++) {
-		data_ptr = kmalloc(size, GFP_ATOMIC);
-		if (!data_ptr) {
-			tc_err(priv, MSG_RX,
-				"RXIN kmalloc data buffer failed: %d\n", size);
-			goto err1;
-		}
+	if (cnt) {
+		writel(cnt, txout->umt_dst+0x28); // TXOUT_HD_ACCUM_SUB instead of TXOUT_HD_ACCUM_ADD
 
-		if (ring_mmap(data_ptr, size, DMA_FROM_DEVICE, &phyaddr) < 0) {
-			tc_err(priv, MSG_RX,
-				"RXIN kmalloc data buffer failed: %d\n", size);
-			goto err2;
+		if (g_plat_priv->netdev) {
+			netdev_completed_queue(g_plat_priv->netdev, cnt, bytes);
 		}
+	}
 
-		desc = (struct dma_desc *)rxin->dbase_mem;
-		desc += rxin->idx;
-		memset(desc, 0, sizeof(*desc));
-
-		desc->data_len = size;
-		desc->byte_off = phyaddr & 0x7;
-		desc->eop = 1;
-		desc->sop = 1;
-		desc->own = 1;
-
-		desc->data_ptr = phyaddr;
-
-		
-		if (ring_mmap(desc, sizeof(*desc), DMA_TO_DEVICE, NULL) < 0) {
-			tc_err(priv, MSG_RX, "RXIN descriptor mmap failed: 0x%x\n",
-				(unsigned int)desc);
-			goto err2;
-		}
-		
-		ring_idx_inc(rxin, idx);
+	if (g_plat_priv->netdev) {
+		netif_tx_unlock(g_plat_priv->netdev);
+	} else {
+		spin_unlock_irqrestore(&tx_spinlock, flags);
 	}
 
-	/* update RXIN UMT*/
-	writel(i, rxin->umt_dst);
-	pr_info("rxin refill %d descriptors\n", i);
-	return;
+	if (cnt && g_plat_priv->netdev && netif_queue_stopped(g_plat_priv->netdev)) {
+		netif_wake_queue(g_plat_priv->netdev);
+	}
+}
 
-err2:
-	kfree(data_ptr);
-err1:
-	if (i)
-		writel(i, rxin->umt_dst);
-	return;
+static void rxin_action(struct tc_priv *priv,
+		struct aca_ring *rxin, int size, int cnt)
+{
+	/* update RXIN UMT*/
+	writel(cnt, rxin->umt_dst);
 }
 
 static int rxout_action(struct tc_priv *priv, struct aca_ring *rxout)
 {
+	struct device *pdev = priv->ep_dev[0].dev;
 	int i, cnt;
-	struct dma_desc *desc;
-	u32 ptr;
-	void *mem;
+	struct dma_rx_desc *desc;
+	dma_addr_t phyaddr;
+	void *ptr, *dst;
+	size_t len;
 	struct sk_buff *skb;
 
-	ring_cnt_update(rxout);
-	cnt = ring_dist(rxout->idx, rxout->cnt, rxout->dnum);
-
-	for (i = 0; i < cnt; i++) {
+	cnt = 0;
+	for (i = 0; i < rxout->dnum; i++) {
 		desc = rxout->dbase_mem;
 		desc += rxout->idx;
 
-		/* read from memory */
-		if (ring_mmap(desc, sizeof(*desc), DMA_FROM_DEVICE, NULL) < 0) {
-			tc_err(priv, MSG_RX,
-				"map RXOUT DMA descriptor failed\n");
-			continue;
+		if (!desc->own) {
+			break;
 		}
-		ptr = desc->data_ptr + desc->byte_off;
-		mem = __va(ptr);
-		skb = build_skb(mem, 0);
-		if (!skb) {
-			tc_err(priv, MSG_RX,
-				"RXOUT build skb failed\n");
-			kfree(mem);
-			continue;
+
+		// this seems to be a pointer to a DS PKT buffer
+		phyaddr = desc->data_ptr;
+		ptr = plat_mem_virt(phyaddr);
+		len = desc->data_len;
+
+		dma_sync_single_for_cpu(pdev, phyaddr, desc->byte_off + len,
+					DMA_FROM_DEVICE);
+
+		skb = netdev_alloc_skb(g_plat_priv->netdev, len);
+		if (unlikely(!skb)) {
+			tc_err(priv, MSG_RX, "RXOUT SKB allocation failed\n");
+			break;
 		}
-		priv->tc_ops.recv(NULL, skb);
-		ring_idx_inc(rxout, idx);
+
+		dst = skb_put(skb, len);
+		memcpy(dst, ptr + desc->byte_off, len);
+
+		priv->tc_ops.recv(g_plat_priv->netdev, skb);
+
+		desc->own = 0;
+
+		cnt++;
+		ring_idx_inc(rxout);
 	}
 
 	if (!cnt)
-		tc_err(priv, MSG_RX, "RXOUT dummy interrupt: dbase: 0x%x, idx: %d, cnt: %d\n",
-			(unsigned int)rxout->dbase_mem, rxout->idx, rxout->cnt);
+		tc_err(priv, MSG_RX, "RXOUT spurious interrupt\n");
 	else
-		writel(cnt, rxout->umt_dst);
+		writel(cnt, rxout->umt_dst+0x28); // RXOUT_HD_ACCUM_SUB instead of RXOUT_HD_ACCUM_ADD
 
-	pr_info("txout received %d packets\n", cnt);
 	return cnt;
 }
 
@@ -669,7 +622,6 @@ static void plat_rxout_tasklet(unsigned
 	struct aca_ring *rxin = &priv->soc_rings.rxin;
 	struct dc_ep_dev *ep_dev = &tcpriv->ep_dev[rxout->ep_dev_idx];
 	int cnt;
-	
 
 	cnt = rxout_action(tcpriv, rxout);
 	if (cnt)
@@ -687,68 +639,144 @@ static int plat_send(struct net_device *
 {
 	struct plat_priv *priv = g_plat_priv;
 	struct aca_ring *txin = &priv->soc_rings.txin;
+	int res;
 
-	txin_action(priv->tc_priv, txin, skb, qid, type);
+	res = txin_action(priv->tc_priv, txin, skb, qid, type);
 
-	return 0;
+	return res;
+}
+
+static void plat_mem_init(void)
+{
+	struct plat_priv *priv = g_plat_priv;
+
+	hash_init(priv->mem_map);
 }
 
 /* return virtual address */
-static void *plat_mem_alloc(size_t size, enum tc_dir dir)
+static void *plat_mem_alloc(size_t size, enum tc_dir dir, u32 *phyaddr)
 {
-	return kmalloc(size, GFP_KERNEL);
+	struct plat_priv *priv = g_plat_priv;
+	struct tc_priv *tcpriv = priv->tc_priv;
+	struct device *pdev = tcpriv->ep_dev[0].dev;
+	enum dma_data_direction dma_dir;
+	struct mem_map_entry *entry;
+
+	entry = kzalloc(sizeof(struct mem_map_entry), GFP_KERNEL);
+	if (!entry)
+		goto err;
+
+	entry->size = size;
+
+	entry->mem = kmalloc(size, GFP_KERNEL);
+	if (!entry->mem)
+		goto err_alloc;
+
+	dma_dir = (dir == DS_DIR) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+	entry->phyaddr = dma_map_single(pdev, entry->mem, entry->size, dma_dir);
+	if (unlikely(dma_mapping_error(pdev, entry->phyaddr))) {
+		tc_err(priv, MSG_INIT,
+			"plat_mem_alloc: DMA mapping error: buf: 0x%x, size: %d, dir: %d\n",
+			(u32)entry->mem, size, dir);
+
+		goto err_map;
+	}
+
+	hash_add(g_plat_priv->mem_map, &entry->node, entry->phyaddr);
+
+	*phyaddr = entry->phyaddr;
+	return entry->mem;
+
+err_map:
+	kfree(entry->mem);
+
+err_alloc:
+	kfree(entry);
+
+err:
+	return NULL;
 }
 
-static void plat_mem_free(u32 phy_addr, enum tc_dir dir)
+static void *plat_mem_virt(u32 phyaddr)
 {
-	void *mem;
+	struct mem_map_entry *entry;
+
+	hash_for_each_possible(g_plat_priv->mem_map, entry, node, phyaddr)
+		if (entry->phyaddr == phyaddr)
+			return entry->mem;
+
+	WARN_ON(1);
+	return NULL;
+}
+
+static struct mem_map_entry *plat_mem_entry(u32 phyaddr)
+{
+	struct mem_map_entry *entry;
+
+	hash_for_each_possible(g_plat_priv->mem_map, entry, node, phyaddr)
+		if (entry->phyaddr == phyaddr)
+			return entry;
 
-	mem = (void * __force)__va(phy_addr);
-	kfree(mem);
+	return NULL;
 }
 
-static void aca_soc_ring_init(struct tc_priv *priv,
-			struct aca_ring *ring, u32 dnum, u32 dsize)
+static void plat_mem_free(u32 phyaddr, enum tc_dir dir)
 {
+	struct tc_priv *priv = g_plat_priv->tc_priv;
+	struct device *pdev = priv->ep_dev[0].dev;
+	enum dma_data_direction dma_dir;
+	struct mem_map_entry *entry;
+
+	entry = plat_mem_entry(phyaddr);
+	if (WARN_ON(!entry))
+		return;
+
+	hash_del(&entry->node);
+
+	dma_dir = (dir == DS_DIR) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+	dma_unmap_single(pdev, entry->phyaddr, entry->size, dma_dir);
+
+	kfree(entry->mem);
+
+	kfree(entry);
+}
+
+static int ring_init(struct tc_priv *priv, struct aca_ring *ring, u32 dnum, u32 dsize)
+{
+	struct device *pdev = priv->ep_dev[0].dev;
 	int size;
-	struct device *pdev;
 
 	memset(ring, 0, sizeof(*ring));
 	ring->dnum = dnum;
+	ring->dsize = dsize;
+
+	if (ring->dnum == 0) {
+		return 0;
+	}
+
 	size = dsize * dnum;
-	pdev = priv->ep_dev[0].dev;
 
-	ring->dbase_mem = kmalloc(size, GFP_KERNEL);
+	ring->dbase_mem = dma_alloc_coherent(pdev, size, &(ring->dbase_phymem), GFP_KERNEL);
 	if (!ring->dbase_mem) {
-		tc_err(priv, MSG_INIT, "Allocate SoC Ring fail: %d\n", dnum);
-		return;
+		tc_err(priv, MSG_INIT, "Ring allocation failed: %d\n", dnum);
+		return -1;
 	}
 
-	ring_mmap(ring->dbase_mem, size, DMA_FROM_DEVICE, &(ring->dbase_phymem));
-	tc_dbg(priv, MSG_INIT, "ring: membase: 0x%x, phybase: 0x%x, dnum: %d\n",
-		(u32)ring->dbase_mem, ring->dbase_phymem, ring->dnum);
-
-	size = sizeof(u32);
-	ring->cnt_addr = kzalloc(size, GFP_KERNEL);
-	if (!ring->cnt_addr) {
-		tc_err(priv, MSG_INIT, "Allocate cumulative counter fail!\n");
-		return;
-	}
+	return 0;
+}
 
-	ring_mmap(ring->cnt_addr, size, DMA_TO_DEVICE, &(ring->cnt_phyaddr));
-	tc_dbg(priv, MSG_INIT, "ring: cumulative cnt addr: 0x%x, phy address: 0x%x\n",
-		(u32)ring->cnt_addr, ring->cnt_phyaddr);
+#define ring_dnum(tcpriv, name1, name2) ((!tcpriv->param.name1##_dnum) ? name2##_DNUM : tcpriv->param.name1##_dnum)
 
-	return;
-}
+static void ring_free(struct tc_priv *priv, struct aca_ring *ring)
+{
+	struct device *pdev = priv->ep_dev[0].dev;
 
-#define ring_init(tcpriv, ring, name1, name2, num, size)	\
-{								\
-	if (!tcpriv->param.name1##_dnum)			\
-		num = name2##_DNUM;				\
-	else							\
-		num = tcpriv->param.name1##_dnum;		\
-	aca_soc_ring_init(tcpriv, ring, num, size);		\
+	if (ring->dnum == 0) {
+		return;
+	}
+
+	dma_free_coherent(pdev, ring->dsize * ring->dnum, ring->dbase_mem, ring->dbase_phymem);
 }
 
 static irqreturn_t aca_rx_irq_handler(int irq, void *dev_id)
@@ -777,39 +805,55 @@ static irqreturn_t aca_tx_irq_handler(in
 	return IRQ_HANDLED;
 }
 
-static void irq_init(struct tc_priv *priv, const char *dev_name)
+static void plat_irq_init(struct tc_priv *priv, const char *dev_name)
 {
 	int ret;
 	int i;
-	char name[IFNAMSIZ];
+	//char name[IFNAMSIZ];
 
 	for (i = 0; i < EP_MAX_NUM && i < priv->ep_num; i++) {
-		sprintf(name, "%s%d", dev_name, i);
+		//snprintf(name, sizeof(name), "aca-rxo%d", i);
 
 		ret = devm_request_irq(priv->ep_dev[i].dev, priv->ep_dev[i].aca_rx_irq,
-				aca_rx_irq_handler, 0, name, &priv->ep_dev[i]);
+				aca_rx_irq_handler, 0, "aca-rxo", &priv->ep_dev[i]);
 
 		if (ret) {
 			tc_err(priv, MSG_INIT,
 				"ACA RX IRQ request Fail!: irq: %d, ep_id: %d\n",
 				priv->ep_dev[i].aca_rx_irq, i);
 			//return;
-		} 
+		}
+
+		//snprintf(name, sizeof(name), "aca-txo%d", i);
 
 		ret = devm_request_irq(priv->ep_dev[i].dev, priv->ep_dev[i].aca_tx_irq,
-				aca_tx_irq_handler, 0, name, &priv->ep_dev[i]);
+				aca_tx_irq_handler, 0, "aca-txo", &priv->ep_dev[i]);
 
 		if (ret) {
 			tc_err(priv, MSG_INIT,
 				"ACA TX IRQ request Fail!: irq: %d, ep_id: %d\n",
 				priv->ep_dev[i].aca_tx_irq, i);
 			//return;
-		} 
+		}
 	}
 
 	return;
 }
 
+static void plat_irq_free(struct tc_priv *priv)
+{
+	int i;
+
+	for (i = 0; i < EP_MAX_NUM && i < priv->ep_num; i++) {
+
+		/* Unregister RX irq handler */
+		devm_free_irq(priv->ep_dev[i].dev, priv->ep_dev[i].aca_rx_irq, &priv->ep_dev[i]);
+
+		/* Unregister TX irq handler */
+		devm_free_irq(priv->ep_dev[i].dev, priv->ep_dev[i].aca_tx_irq, &priv->ep_dev[i]);
+	}
+}
+
 /**
  * Decide txin/rxout queue size
  * Create a tx/rx queue
@@ -819,29 +863,68 @@ static int plat_dp_init(struct plat_priv
 	struct tc_priv *tcpriv;
 	struct aca_ring_grp *soc_rings;
 	struct aca_ring *ring;
-	int size;
 	u32 dnum;
+	int i;
+	int ret = 0;
 
 	tcpriv = priv->tc_priv;
 
-	size = sizeof(struct dma_desc);
+	plat_mem_init();
+
 	soc_rings = &priv->soc_rings;
 
 	/* txin ring */
 	ring = &soc_rings->txin;
-	ring_init(tcpriv, ring, txin, TXIN, dnum, size);
+	dnum = ring_dnum(tcpriv, txin, TXIN);
+	ret = txlist_init(&soc_rings->txlist, dnum);
+	if (ret < 0)
+		goto err5;
+	ret = ring_init(tcpriv, ring, dnum, sizeof(struct dma_tx_desc));
+	if (ret < 0)
+		goto err4;
 
 	/* txout ring */
 	ring = &soc_rings->txout;
-	ring_init(tcpriv, ring, txout, TXOUT, dnum, size);
+	dnum = ring_dnum(tcpriv, txout, TXOUT);
+	ret = ring_init(tcpriv, ring, dnum, sizeof(u32));
+	if (ret < 0)
+		goto err3;
+
 	/* rxin ring */
 	ring = &soc_rings->rxin;
-	ring_init(tcpriv, ring, rxin, RXIN, dnum, size);
+	dnum = ring_dnum(tcpriv, rxin, RXIN);
+	ret |= ring_init(tcpriv, ring, dnum, sizeof(struct dma_rx_desc));
+	if (ret < 0)
+		goto err2;
+
 	/* rxout ring */
 	ring = &soc_rings->rxout;
-	ring_init(tcpriv, ring, rxout, RXOUT, dnum, size);
+	dnum = ring_dnum(tcpriv, rxout, RXOUT);
+	ret = ring_init(tcpriv, ring, dnum, sizeof(struct dma_rx_desc));
+	if (ret < 0)
+		goto err1;
+
+	for (i = 0; i < EP_MAX_NUM && i < tcpriv->ep_num; i++) {
+
+ 		/* Enable RX interrupt */
+ 		tcpriv->ep_dev[i].hw_ops->icu_en(&tcpriv->ep_dev[i], ACA_HOSTIF_RX);
+
+ 		/* Enable TX interrupt */
+ 		tcpriv->ep_dev[i].hw_ops->icu_en(&tcpriv->ep_dev[i], ACA_HOSTIF_TX);
+ 	}
 
 	return 0;
+
+err1:
+	ring_free(tcpriv, &soc_rings->rxin);
+err2:
+	ring_free(tcpriv, &soc_rings->txout);
+err3:
+	ring_free(tcpriv, &soc_rings->txin);
+err4:
+	txlist_free(&soc_rings->txlist);
+err5:
+	return ret;
 }
 
 /**
@@ -850,6 +933,26 @@ static int plat_dp_init(struct plat_priv
  */
 static void plat_dp_exit(struct plat_priv *priv)
 {
+	struct tc_priv *tcpriv = priv->tc_priv;
+	struct aca_ring_grp *soc_rings = &priv->soc_rings;
+	int i;
+
+	for (i = 0; i < EP_MAX_NUM && i < tcpriv->ep_num; i++) {
+
+		/* Disable RX interrupt */
+		tcpriv->ep_dev[i].hw_ops->icu_mask(&tcpriv->ep_dev[i], ACA_HOSTIF_RX);
+
+		/* Disable TX interrupt */
+		tcpriv->ep_dev[i].hw_ops->icu_mask(&tcpriv->ep_dev[i], ACA_HOSTIF_TX);
+	}
+
+	ring_free(tcpriv, &soc_rings->txin);
+	ring_free(tcpriv, &soc_rings->txout);
+	ring_free(tcpriv, &soc_rings->rxin);
+	ring_free(tcpriv, &soc_rings->rxout);
+
+	txlist_free(&soc_rings->txlist);
+
 	return;
 }
 
@@ -858,45 +961,45 @@ static int plat_soc_cfg_get(struct soc_c
 	struct plat_priv *priv = g_plat_priv;
 
 	/* TXIN */
-	cfg->txin_dbase = priv->soc_rings.txin.dbase_phymem;
-	cfg->txin_dnum = priv->soc_rings.txin.dnum;
-	cfg->txin_desc_dwsz = DW_SZ(struct dma_desc);
-	cfg->txin_cnt_phyaddr = priv->soc_rings.txin.cnt_phyaddr;
+	cfg->txin.soc_phydbase = priv->soc_rings.txin.dbase_phymem;
+	cfg->txin.soc_dnum = priv->soc_rings.txin.dnum;
+	cfg->txin.soc_desc_dwsz = DW_SZ(struct dma_tx_desc);
 	/* TXOUT */
-	cfg->txout_dbase = priv->soc_rings.txout.dbase_phymem;
-	cfg->txout_dnum = priv->soc_rings.txout.dnum;
-	cfg->txout_desc_dwsz = DW_SZ(struct dma_desc);
-	cfg->txout_cnt_phyaddr = priv->soc_rings.txout.cnt_phyaddr;
+	cfg->txout.soc_phydbase = priv->soc_rings.txout.dbase_phymem;
+	cfg->txout.soc_dnum = priv->soc_rings.txout.dnum;
+	cfg->txout.soc_desc_dwsz = DW_SZ(u32);
 	/* RXOUT */
-	cfg->rxout_dbase = priv->soc_rings.rxout.dbase_phymem;
-	cfg->rxout_dnum = priv->soc_rings.rxout.dnum;
-	cfg->rxout_desc_dwsz = DW_SZ(struct dma_desc);
-	cfg->rxout_cnt_phyaddr = priv->soc_rings.rxout.cnt_phyaddr;
+	cfg->rxout.soc_phydbase = priv->soc_rings.rxout.dbase_phymem;
+	cfg->rxout.soc_dnum = priv->soc_rings.rxout.dnum;
+	cfg->rxout.soc_desc_dwsz = DW_SZ(struct dma_rx_desc);
 	/* RXIN */
-	cfg->rxin_dbase = priv->soc_rings.rxin.dbase_phymem;
-	cfg->rxin_dnum = priv->soc_rings.rxin.dnum;
-	cfg->rxin_desc_dwsz = DW_SZ(struct dma_desc);
-	cfg->rxin_cnt_phyaddr = priv->soc_rings.rxin.cnt_phyaddr;
+	cfg->rxin.soc_phydbase = priv->soc_rings.rxin.dbase_phymem;
+	cfg->rxin.soc_dnum = priv->soc_rings.rxin.dnum;
+	cfg->rxin.soc_desc_dwsz = DW_SZ(struct dma_rx_desc);
 
 	tc_info(priv->tc_priv, MSG_INIT,
 		"id: %d, txin(0x%x: %d, 0x%x), txout(0x%x: %d, 0x%x), rxin(0x%x: %d, 0x%x), rxout(0x%x: %d, 0x%x)\n",
-		id, cfg->txin_dbase, cfg->txin_dnum, cfg->txin_cnt_phyaddr,
-		cfg->txout_dbase, cfg->txout_dnum, cfg->txout_cnt_phyaddr,
-		cfg->rxin_dbase, cfg->rxout_dnum, cfg->rxin_cnt_phyaddr,
-		cfg->rxout_dbase, cfg->rxout_dnum, cfg->rxout_cnt_phyaddr);
+		id, cfg->txin.soc_phydbase, cfg->txin.soc_dnum, cfg->txin.soc_cnt_phyaddr,
+		cfg->txout.soc_phydbase, cfg->txout.soc_dnum, cfg->txout.soc_cnt_phyaddr,
+		cfg->rxin.soc_phydbase, cfg->rxin.soc_dnum, cfg->rxin.soc_cnt_phyaddr,
+		cfg->rxout.soc_phydbase, cfg->rxout.soc_dnum, cfg->rxout.soc_cnt_phyaddr);
 
 	return 0;
 }
 
-static int plat_open(struct net_device *pdev, char *dev_name,
-		int *subif, int flag)
+static int plat_open(struct net_device *pdev, const char *dev_name,
+		int id, int flag)
 {
+	g_plat_priv->netdev = pdev;
+
 	return 0;
 }
 
-static void plat_close(struct net_device *pdev, char *dev_name,
-		int subif, int flag)
+static void plat_close(struct net_device *pdev, const char *dev_name,
+		int flag)
 {
+	g_plat_priv->netdev = NULL;
+
 	return;
 }
 
@@ -971,7 +1074,6 @@ static void plat_disable_us(int en)
 static int plat_get_mib(struct net_device *pdev,
 			struct rtnl_link_stats64 *stat)
 {
-	pr_info("%s is not supported\n", __func__);
 	return -ENOTSUPP;
 }
 
@@ -1181,8 +1283,8 @@ int platform_init(struct tc_priv *tc_pri
 	INIT_WORK(&priv->req_work.work, plat_tc_req_workqueue);
 	tasklet_init(&txout_task, plat_txout_tasklet, 0);
 	tasklet_init(&rxout_task, plat_rxout_tasklet, 0);
-	irq_init(tc_priv, drv_name);
-	//tasklet_init(&priv->coc.coc_task, plat_coc_tasklet, 0);
+	plat_irq_init(tc_priv, drv_name);
+
 	plat_tc_ops_setup(tc_priv);
 	plat_dsl_ops_setup();
 
@@ -1201,8 +1303,15 @@ void platform_dsl_exit(void)
 
 void platform_exit(void)
 {
-	//tasklet_kill(&g_plat_priv->coc.coc_task);
+	struct tc_priv *tcpriv = plat_to_tcpriv();
+
+	tasklet_kill(&txout_task);
+	tasklet_kill(&rxout_task);
+
+	plat_irq_free(tcpriv);
+
 	plat_dp_exit(g_plat_priv);
+
 	g_plat_priv = NULL;
 }