net: update FTGMAC100 for MMU/D-cache support
Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com>
CC: Joe Hershberger <joe.hershberger@gmail.com>
CC: Tom Rini <trini@ti.com>
diff --git a/drivers/net/ftgmac100.c b/drivers/net/ftgmac100.c
index 69ba57d..2dbb328 100644
--- a/drivers/net/ftgmac100.c
+++ b/drivers/net/ftgmac100.c
@@ -27,11 +27,13 @@
#include <malloc.h>
#include <net.h>
#include <asm/io.h>
+#include <asm/dma-mapping.h>
#include <linux/mii.h>
#include "ftgmac100.h"
#define ETH_ZLEN 60
+#define CFG_XBUF_SIZE 1536
/* RBSR - hw default init value is also 0x640 */
#define RBSR_DEFAULT_VALUE 0x640
@@ -40,8 +42,10 @@
#define PKTBUFSTX 4 /* must be power of 2 */
struct ftgmac100_data {
- struct ftgmac100_txdes txdes[PKTBUFSTX];
- struct ftgmac100_rxdes rxdes[PKTBUFSRX];
+ ulong txdes_dma;
+ struct ftgmac100_txdes *txdes;
+ ulong rxdes_dma;
+ struct ftgmac100_rxdes *rxdes;
int tx_index;
int rx_index;
int phy_addr;
@@ -375,13 +379,34 @@
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
struct ftgmac100_data *priv = dev->priv;
- struct ftgmac100_txdes *txdes = priv->txdes;
- struct ftgmac100_rxdes *rxdes = priv->rxdes;
+ struct ftgmac100_txdes *txdes;
+ struct ftgmac100_rxdes *rxdes;
unsigned int maccr;
+ void *buf;
int i;
debug("%s()\n", __func__);
+ if (!priv->txdes) {
+ txdes = dma_alloc_coherent(
+ sizeof(*txdes) * PKTBUFSTX, &priv->txdes_dma);
+ if (!txdes)
+ panic("ftgmac100: out of memory\n");
+ memset(txdes, 0, sizeof(*txdes) * PKTBUFSTX);
+ priv->txdes = txdes;
+ }
+ txdes = priv->txdes;
+
+ if (!priv->rxdes) {
+ rxdes = dma_alloc_coherent(
+ sizeof(*rxdes) * PKTBUFSRX, &priv->rxdes_dma);
+ if (!rxdes)
+ panic("ftgmac100: out of memory\n");
+ memset(rxdes, 0, sizeof(*rxdes) * PKTBUFSRX);
+ priv->rxdes = rxdes;
+ }
+ rxdes = priv->rxdes;
+
/* set the ethernet address */
ftgmac100_set_mac_from_env(dev);
@@ -397,21 +422,31 @@
for (i = 0; i < PKTBUFSTX; i++) {
/* TXBUF_BADR */
- txdes[i].txdes3 = 0;
+ if (!txdes[i].txdes2) {
+ buf = memalign(ARCH_DMA_MINALIGN, CFG_XBUF_SIZE);
+ if (!buf)
+ panic("ftgmac100: out of memory\n");
+ txdes[i].txdes3 = virt_to_phys(buf);
+ txdes[i].txdes2 = (uint)buf;
+ }
txdes[i].txdes1 = 0;
}
for (i = 0; i < PKTBUFSRX; i++) {
/* RXBUF_BADR */
- rxdes[i].rxdes3 = (unsigned int)NetRxPackets[i];
+ if (!rxdes[i].rxdes2) {
+ buf = NetRxPackets[i];
+ rxdes[i].rxdes3 = virt_to_phys(buf);
+ rxdes[i].rxdes2 = (uint)buf;
+ }
rxdes[i].rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
}
/* transmit ring */
- writel((unsigned int)txdes, &ftgmac100->txr_badr);
+ writel(priv->txdes_dma, &ftgmac100->txr_badr);
/* receive ring */
- writel((unsigned int)rxdes, &ftgmac100->rxr_badr);
+ writel(priv->rxdes_dma, &ftgmac100->rxr_badr);
/* poll receive descriptor automatically */
writel(FTGMAC100_APTC_RXPOLL_CNT(1), &ftgmac100->aptc);
@@ -466,8 +501,11 @@
debug("%s(): RX buffer %d, %x received\n",
__func__, priv->rx_index, rxlen);
+ /* invalidate d-cache */
+ dma_map_single((void *)curr_des->rxdes2, rxlen, DMA_FROM_DEVICE);
+
/* pass the packet up to the protocol layers. */
- NetReceive((void *)curr_des->rxdes3, rxlen);
+ NetReceive((void *)curr_des->rxdes2, rxlen);
/* release buffer to DMA */
curr_des->rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
@@ -485,7 +523,6 @@
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
struct ftgmac100_data *priv = dev->priv;
struct ftgmac100_txdes *curr_des = &priv->txdes[priv->tx_index];
- int start;
if (curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN) {
debug("%s(): no TX descriptor available\n", __func__);
@@ -496,8 +533,8 @@
length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
- /* initiate a transmit sequence */
- curr_des->txdes3 = (unsigned int)packet; /* TXBUF_BADR */
+ memcpy((void *)curr_des->txdes2, (void *)packet, length);
+ dma_map_single((void *)curr_des->txdes2, length, DMA_TO_DEVICE);
/* only one descriptor on TXBUF */
curr_des->txdes0 &= FTGMAC100_TXDES0_EDOTR;
@@ -509,15 +546,6 @@
/* start transmit */
writel(1, &ftgmac100->txpd);
- /* wait for transfer to succeed */
- start = get_timer(0);
- while (curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN) {
- if (get_timer(0) >= 5) {
- debug("%s(): timed out\n", __func__);
- return -1;
- }
- }
-
debug("%s(): packet sent\n", __func__);
priv->tx_index = (priv->tx_index + 1) % PKTBUFSTX;