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driver: net: fm: separate receive buffer free code

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Move the receive buffer free code in a separate function.

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Madalin Bucur 2020-04-23 16:25:17 +03:00 committed by Priyanka Jain
parent 8313cb0215
commit 1c710187a5
1 changed files with 37 additions and 26 deletions
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63
drivers/net/fm/eth.c
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@ -567,20 +567,46 @@ static int fm_eth_send(struct eth_device *dev, void *buf, int len)
return 1;
}
static struct fm_port_bd *fm_eth_free_one(struct fm_eth *fm_eth,
struct fm_port_bd *rxbd)
{
struct fm_port_global_pram *pram;
struct fm_port_bd *rxbd_base;
u16 offset_out;
pram = fm_eth->rx_pram;
/* clear the RxBDs */
muram_writew(&rxbd->status, RxBD_EMPTY);
muram_writew(&rxbd->len, 0);
sync();
/* advance RxBD */
rxbd++;
rxbd_base = (struct fm_port_bd *)fm_eth->rx_bd_ring;
if (rxbd >= (rxbd_base + RX_BD_RING_SIZE))
rxbd = rxbd_base;
/* update RxQD */
offset_out = muram_readw(&pram->rxqd.offset_out);
offset_out += sizeof(struct fm_port_bd);
if (offset_out >= muram_readw(&pram->rxqd.bd_ring_size))
offset_out = 0;
muram_writew(&pram->rxqd.offset_out, offset_out);
sync();
return rxbd;
}
static int fm_eth_recv(struct eth_device *dev)
{
struct fm_eth *fm_eth;
struct fm_port_global_pram *pram;
struct fm_port_bd *rxbd, *rxbd_base;
u16 status, len;
struct fm_eth *fm_eth = (struct fm_eth *)dev->priv;
struct fm_port_bd *rxbd = fm_eth->cur_rxbd;
u32 buf_lo, buf_hi;
u16 status, len;
int ret = -1;
u8 *data;
u16 offset_out;
int ret = 1;
fm_eth = (struct fm_eth *)dev->priv;
pram = fm_eth->rx_pram;
rxbd = fm_eth->cur_rxbd;
status = muram_readw(&rxbd->status);
while (!(status & RxBD_EMPTY)) {
@ -595,26 +621,11 @@ static int fm_eth_recv(struct eth_device *dev)
ret = 0;
}
/* clear the RxBDs */
muram_writew(&rxbd->status, RxBD_EMPTY);
muram_writew(&rxbd->len, 0);
sync();
/* free current bd, advance to next one */
rxbd = fm_eth_free_one(fm_eth, rxbd);
/* advance RxBD */
rxbd++;
rxbd_base = (struct fm_port_bd *)fm_eth->rx_bd_ring;
if (rxbd >= (rxbd_base + RX_BD_RING_SIZE))
rxbd = rxbd_base;
/* read next status */
status = muram_readw(&rxbd->status);
/* update RxQD */
offset_out = muram_readw(&pram->rxqd.offset_out);
offset_out += sizeof(struct fm_port_bd);
if (offset_out >= muram_readw(&pram->rxqd.bd_ring_size))
offset_out = 0;
muram_writew(&pram->rxqd.offset_out, offset_out);
sync();
}
fm_eth->cur_rxbd = (void *)rxbd;