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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>
This commit is contained in:
Mugunthan V N 2013-02-11 09:52:18 +00:00 committed by David S. Miller
parent 570617e79c
commit f6e135c81e
4 changed files with 24 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/ethernet/ti/cpsw.c
View File

@ -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;

17
drivers/net/ethernet/ti/davinci_cpdma.c
View File

@ -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);

4
drivers/net/ethernet/ti/davinci_cpdma.h
View File

@ -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);

6
drivers/net/ethernet/ti/davinci_emac.c
View File

@ -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;
}