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net: ethernet: ti: davinci_cpdma: split descs num between all channels

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Tx channels share same pool of descriptors. Thus one channel can
block another if pool is emptied by one. But, the shaper should
decide which channel is allowed to send packets. To avoid such
impact of one channel on another, let every channel to have its
own piece of pool.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Khoronzhuk
2016-08-22 21:18:24 +03:00
committed by David S. Miller
parent a01512dbe3
commit 3802dce178
3 changed files with 83 additions and 27 deletions
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2
drivers/net/ethernet/ti/davinci_cpdma.h
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@@ -80,7 +80,7 @@ int cpdma_ctlr_stop(struct cpdma_ctlr *ctlr);
struct cpdma_chan *cpdma_chan_create(struct cpdma_ctlr *ctlr, int chan_num,
cpdma_handler_fn handler);
int cpdma_chan_get_rx_buf_num(struct cpdma_ctlr *ctlr);
int cpdma_chan_get_rx_buf_num(struct cpdma_chan *chan);
int cpdma_chan_destroy(struct cpdma_chan *chan);
int cpdma_chan_start(struct cpdma_chan *chan);
int cpdma_chan_stop(struct cpdma_chan *chan);