driver: net: ethernet: davinci_cpdma: add support for directed packet and source port detection

* Introduced parameter to add port number for directed packet in cpdma_chan_submit
* Source port detection macro with DMA descriptor status

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 24 insertions, 9 deletions

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 888708ceb13c..8ac60c7a2a23 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -424,7 +424,7 @@ void cpsw_rx_handler(void *token, int len, int status)
                         return;
 
                 ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
-                                        skb_tailroom(skb), GFP_KERNEL);
+                                        skb_tailroom(skb), 0, GFP_KERNEL);
         }
         WARN_ON(ret < 0);
 }
@@ -705,7 +705,7 @@ static int cpsw_ndo_open(struct net_device *ndev)
                 if (!skb)
                         break;
                 ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
-                                        skb_tailroom(skb), GFP_KERNEL);
+                                        skb_tailroom(skb), 0, GFP_KERNEL);
                 if (WARN_ON(ret < 0))
                         break;
         }
@@ -766,7 +766,7 @@ static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
         skb_tx_timestamp(skb);
 
         ret = cpdma_chan_submit(priv->txch, skb, skb->data,
-                                skb->len, GFP_KERNEL);
+                                skb->len, 0, GFP_KERNEL);
         if (unlikely(ret != 0)) {
                 cpsw_err(priv, tx_err, "desc submit failed\n");
                 goto fail;
diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c
index f8629186afbe..198cf18dc7fc 100644
--- a/drivers/net/ethernet/ti/davinci_cpdma.c
+++ b/drivers/net/ethernet/ti/davinci_cpdma.c
@@ -60,6 +60,9 @@
 #define CPDMA_DESC_EOQ          BIT(28)
 #define CPDMA_DESC_TD_COMPLETE  BIT(27)
 #define CPDMA_DESC_PASS_CRC     BIT(26)
+#define CPDMA_DESC_TO_PORT_EN   BIT(20)
+#define CPDMA_TO_PORT_SHIFT     16
+#define CPDMA_DESC_PORT_MASK    (BIT(18) | BIT(17) | BIT(16))
 
 #define CPDMA_TEARDOWN_VALUE    0xfffffffc
 
@@ -132,6 +135,14 @@ struct cpdma_chan {
 #define chan_write(chan, fld, v)        __raw_writel(v, (chan)->fld)
 #define desc_write(desc, fld, v)        __raw_writel((u32)(v), &(desc)->fld)
 
+#define cpdma_desc_to_port(chan, mode, directed)                        \
+        do {                                                            \
+                if (!is_rx_chan(chan) && ((directed == 1) ||            \
+                                          (directed == 2)))             \
+                        mode |= (CPDMA_DESC_TO_PORT_EN |                \
+                                 (directed << CPDMA_TO_PORT_SHIFT));    \
+        } while (0)
+
 /*
  * Utility constructs for a cpdma descriptor pool.  Some devices (e.g. davinci
  * emac) have dedicated on-chip memory for these descriptors.  Some other
@@ -662,7 +673,7 @@ static void __cpdma_chan_submit(struct cpdma_chan *chan,
 }
 
 int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
-                      int len, gfp_t gfp_mask)
+                      int len, int directed, gfp_t gfp_mask)
 {
         struct cpdma_ctlr               *ctlr = chan->ctlr;
         struct cpdma_desc __iomem       *desc;
@@ -692,6 +703,7 @@ int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
 
         buffer = dma_map_single(ctlr->dev, data, len, chan->dir);
         mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
+        cpdma_desc_to_port(chan, mode, directed);
 
         desc_write(desc, hw_next,   0);
         desc_write(desc, hw_buffer, buffer);
@@ -782,7 +794,8 @@ static int __cpdma_chan_process(struct cpdma_chan *chan)
                 status = -EBUSY;
                 goto unlock_ret;
         }
-        status  = status & (CPDMA_DESC_EOQ | CPDMA_DESC_TD_COMPLETE);
+        status  = status & (CPDMA_DESC_EOQ | CPDMA_DESC_TD_COMPLETE |
+                            CPDMA_DESC_PORT_MASK);
 
         chan->head = desc_from_phys(pool, desc_read(desc, hw_next));
         chan_write(chan, cp, desc_dma);
diff --git a/drivers/net/ethernet/ti/davinci_cpdma.h b/drivers/net/ethernet/ti/davinci_cpdma.h
index 8d2aeb2096ac..a97d6ab30941 100644
--- a/drivers/net/ethernet/ti/davinci_cpdma.h
+++ b/drivers/net/ethernet/ti/davinci_cpdma.h
@@ -24,6 +24,8 @@
 #define __chan_linear(chan_num) ((chan_num) & (CPDMA_MAX_CHANNELS - 1))
 #define chan_linear(chan)       __chan_linear((chan)->chan_num)
 
+#define CPDMA_RX_SOURCE_PORT(__status__)        ((__status__ >> 16) & 0x7)
+
 struct cpdma_params {
         struct device           *dev;
         void __iomem            *dmaregs;
@@ -82,7 +84,7 @@ int cpdma_chan_dump(struct cpdma_chan *chan);
 int cpdma_chan_get_stats(struct cpdma_chan *chan,
                          struct cpdma_chan_stats *stats);
 int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
-                      int len, gfp_t gfp_mask);
+                      int len, int directed, gfp_t gfp_mask);
 int cpdma_chan_process(struct cpdma_chan *chan, int quota);
 
 int cpdma_ctlr_int_ctrl(struct cpdma_ctlr *ctlr, bool enable);
diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 242ec55110d2..52c05366599a 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1037,7 +1037,7 @@ static void emac_rx_handler(void *token, int len, int status)
 
 recycle:
         ret = cpdma_chan_submit(priv->rxchan, skb, skb->data,
-                        skb_tailroom(skb), GFP_KERNEL);
+                        skb_tailroom(skb), 0, GFP_KERNEL);
 
         WARN_ON(ret == -ENOMEM);
         if (unlikely(ret < 0))
@@ -1092,7 +1092,7 @@ static int emac_dev_xmit(struct sk_buff *skb, struct net_device *ndev)
         skb_tx_timestamp(skb);
 
         ret_code = cpdma_chan_submit(priv->txchan, skb, skb->data, skb->len,
-                                     GFP_KERNEL);
+                                     0, GFP_KERNEL);
         if (unlikely(ret_code != 0)) {
                 if (netif_msg_tx_err(priv) && net_ratelimit())
                         dev_err(emac_dev, "DaVinci EMAC: desc submit failed");
@@ -1558,7 +1558,7 @@ static int emac_dev_open(struct net_device *ndev)
                         break;
 
                 ret = cpdma_chan_submit(priv->rxchan, skb, skb->data,
-                                        skb_tailroom(skb), GFP_KERNEL);
+                                        skb_tailroom(skb), 0, GFP_KERNEL);
                 if (WARN_ON(ret < 0))
                         break;
         }