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arm: kirkwood: See to it that sent data is 8-byte aligned

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U-boot might use non-8-byte-aligned addresses for sending data, which
the kwgbe_send doesn't accept (bootp does this for me). This patch
copies the data to be sent to a malloced temporary buffer if it is
non-aligned.

Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Simon Kagstrom 2009-08-20 10:14:11 +02:00 committed by Ben Warren
parent cad713bf75
commit 477fa6378f
2 changed files with 18 additions and 4 deletions
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21
drivers/net/kirkwood_egiga.c
View file

@ -500,18 +500,26 @@ static int kwgbe_send(struct eth_device *dev, volatile void *dataptr,
struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
struct kwgbe_registers *regs = dkwgbe->regs;
struct kwgbe_txdesc *p_txdesc = dkwgbe->p_txdesc;
void *p = (void *)dataptr;
u32 cmd_sts;
/* Copy buffer if it's misaligned */
if ((u32) dataptr & 0x07) {
printf("Err..(%s) xmit dataptr not 64bit aligned\n",
__FUNCTION__);
return -1;
if (datasize > PKTSIZE_ALIGN) {
printf("Non-aligned data too large (%d)\n",
datasize);
return -1;
}
memcpy(dkwgbe->p_aligned_txbuf, p, datasize);
p = dkwgbe->p_aligned_txbuf;
}
p_txdesc->cmd_sts = KWGBE_ZERO_PADDING | KWGBE_GEN_CRC;
p_txdesc->cmd_sts |= KWGBE_TX_FIRST_DESC | KWGBE_TX_LAST_DESC;
p_txdesc->cmd_sts |= KWGBE_BUFFER_OWNED_BY_DMA;
p_txdesc->cmd_sts |= KWGBE_TX_EN_INTERRUPT;
p_txdesc->buf_ptr = (u8 *) dataptr;
p_txdesc->buf_ptr = (u8 *) p;
p_txdesc->byte_cnt = datasize;
/* Apply send command using zeroth RXUQ */
@ -628,8 +636,13 @@ int kirkwood_egiga_initialize(bd_t * bis)
* PKTSIZE_ALIGN + 1)))
goto error3;
if (!(dkwgbe->p_aligned_txbuf = memalign(8, PKTSIZE_ALIGN)))
goto error4;
if (!(dkwgbe->p_txdesc = (struct kwgbe_txdesc *)
memalign(PKTALIGN, sizeof(struct kwgbe_txdesc) + 1))) {
free(dkwgbe->p_aligned_txbuf);
error4:
free(dkwgbe->p_rxbuf);
error3:
free(dkwgbe->p_rxdesc);

1
drivers/net/kirkwood_egiga.h
View file

@ -499,6 +499,7 @@ struct kwgbe_device {
struct kwgbe_rxdesc *p_rxdesc;
struct kwgbe_rxdesc *p_rxdesc_curr;
u8 *p_rxbuf;
u8 *p_aligned_txbuf;
};
#endif /* __EGIGA_H__ */