arm: kirkwood: See to it that sent data is 8-byte aligned
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>
diff --git a/drivers/net/kirkwood_egiga.c b/drivers/net/kirkwood_egiga.c
index 9f36633..479035d 100644
--- a/drivers/net/kirkwood_egiga.c
+++ b/drivers/net/kirkwood_egiga.c
@@ -500,18 +500,26 @@
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 @@
* 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);