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path: root/drivers/net/ethernet/renesas/sh_eth.c
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Diffstat (limited to 'drivers/net/ethernet/renesas/sh_eth.c')
-rw-r--r--drivers/net/ethernet/renesas/sh_eth.c80
1 files changed, 55 insertions, 25 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index e7bab7909ed9..6a8fc0f341ff 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -52,6 +52,8 @@
NETIF_MSG_RX_ERR| \
NETIF_MSG_TX_ERR)
+#define SH_ETH_OFFSET_INVALID ((u16)~0)
+
#define SH_ETH_OFFSET_DEFAULTS \
[0 ... SH_ETH_MAX_REGISTER_OFFSET - 1] = SH_ETH_OFFSET_INVALID
@@ -404,6 +406,28 @@ static const u16 sh_eth_offset_fast_sh3_sh2[SH_ETH_MAX_REGISTER_OFFSET] = {
static void sh_eth_rcv_snd_disable(struct net_device *ndev);
static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev);
+static void sh_eth_write(struct net_device *ndev, u32 data, int enum_index)
+{
+ struct sh_eth_private *mdp = netdev_priv(ndev);
+ u16 offset = mdp->reg_offset[enum_index];
+
+ if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
+ return;
+
+ iowrite32(data, mdp->addr + offset);
+}
+
+static u32 sh_eth_read(struct net_device *ndev, int enum_index)
+{
+ struct sh_eth_private *mdp = netdev_priv(ndev);
+ u16 offset = mdp->reg_offset[enum_index];
+
+ if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
+ return ~0U;
+
+ return ioread32(mdp->addr + offset);
+}
+
static bool sh_eth_is_gether(struct sh_eth_private *mdp)
{
return mdp->reg_offset == sh_eth_offset_gigabit;
@@ -1143,6 +1167,7 @@ static void sh_eth_ring_format(struct net_device *ndev)
int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring;
int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
dma_addr_t dma_addr;
+ u32 buf_len;
mdp->cur_rx = 0;
mdp->cur_tx = 0;
@@ -1163,16 +1188,16 @@ static void sh_eth_ring_format(struct net_device *ndev)
/* RX descriptor */
rxdesc = &mdp->rx_ring[i];
/* The size of the buffer is a multiple of 32 bytes. */
- rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 32);
- dma_addr = dma_map_single(&ndev->dev, skb->data,
- rxdesc->buffer_length,
+ buf_len = ALIGN(mdp->rx_buf_sz, 32);
+ rxdesc->len = cpu_to_edmac(mdp, buf_len << 16);
+ dma_addr = dma_map_single(&ndev->dev, skb->data, buf_len,
DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, dma_addr)) {
kfree_skb(skb);
break;
}
mdp->rx_skbuff[i] = skb;
- rxdesc->addr = dma_addr;
+ rxdesc->addr = cpu_to_edmac(mdp, dma_addr);
rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP);
/* Rx descriptor address set */
@@ -1196,7 +1221,7 @@ static void sh_eth_ring_format(struct net_device *ndev)
mdp->tx_skbuff[i] = NULL;
txdesc = &mdp->tx_ring[i];
txdesc->status = cpu_to_edmac(mdp, TD_TFP);
- txdesc->buffer_length = 0;
+ txdesc->len = cpu_to_edmac(mdp, 0);
if (i == 0) {
/* Tx descriptor address set */
sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
@@ -1403,8 +1428,10 @@ static int sh_eth_txfree(struct net_device *ndev)
entry, edmac_to_cpu(mdp, txdesc->status));
/* Free the original skb. */
if (mdp->tx_skbuff[entry]) {
- dma_unmap_single(&ndev->dev, txdesc->addr,
- txdesc->buffer_length, DMA_TO_DEVICE);
+ dma_unmap_single(&ndev->dev,
+ edmac_to_cpu(mdp, txdesc->addr),
+ edmac_to_cpu(mdp, txdesc->len) >> 16,
+ DMA_TO_DEVICE);
dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
mdp->tx_skbuff[entry] = NULL;
free_num++;
@@ -1414,7 +1441,7 @@ static int sh_eth_txfree(struct net_device *ndev)
txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
ndev->stats.tx_packets++;
- ndev->stats.tx_bytes += txdesc->buffer_length;
+ ndev->stats.tx_bytes += edmac_to_cpu(mdp, txdesc->len) >> 16;
}
return free_num;
}
@@ -1433,6 +1460,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
u32 desc_status;
int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
dma_addr_t dma_addr;
+ u32 buf_len;
boguscnt = min(boguscnt, *quota);
limit = boguscnt;
@@ -1441,7 +1469,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
/* RACT bit must be checked before all the following reads */
dma_rmb();
desc_status = edmac_to_cpu(mdp, rxdesc->status);
- pkt_len = rxdesc->frame_length;
+ pkt_len = edmac_to_cpu(mdp, rxdesc->len) & RD_RFL;
if (--boguscnt < 0)
break;
@@ -1462,6 +1490,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
if (mdp->cd->shift_rd0)
desc_status >>= 16;
+ skb = mdp->rx_skbuff[entry];
if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
RD_RFS5 | RD_RFS6 | RD_RFS10)) {
ndev->stats.rx_errors++;
@@ -1477,16 +1506,16 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
ndev->stats.rx_missed_errors++;
if (desc_status & RD_RFS10)
ndev->stats.rx_over_errors++;
- } else {
+ } else if (skb) {
+ dma_addr = edmac_to_cpu(mdp, rxdesc->addr);
if (!mdp->cd->hw_swap)
sh_eth_soft_swap(
- phys_to_virt(ALIGN(rxdesc->addr, 4)),
+ phys_to_virt(ALIGN(dma_addr, 4)),
pkt_len + 2);
- skb = mdp->rx_skbuff[entry];
mdp->rx_skbuff[entry] = NULL;
if (mdp->cd->rpadir)
skb_reserve(skb, NET_IP_ALIGN);
- dma_unmap_single(&ndev->dev, rxdesc->addr,
+ dma_unmap_single(&ndev->dev, dma_addr,
ALIGN(mdp->rx_buf_sz, 32),
DMA_FROM_DEVICE);
skb_put(skb, pkt_len);
@@ -1506,7 +1535,8 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
entry = mdp->dirty_rx % mdp->num_rx_ring;
rxdesc = &mdp->rx_ring[entry];
/* The size of the buffer is 32 byte boundary. */
- rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 32);
+ buf_len = ALIGN(mdp->rx_buf_sz, 32);
+ rxdesc->len = cpu_to_edmac(mdp, buf_len << 16);
if (mdp->rx_skbuff[entry] == NULL) {
skb = netdev_alloc_skb(ndev, skbuff_size);
@@ -1514,8 +1544,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
break; /* Better luck next round. */
sh_eth_set_receive_align(skb);
dma_addr = dma_map_single(&ndev->dev, skb->data,
- rxdesc->buffer_length,
- DMA_FROM_DEVICE);
+ buf_len, DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, dma_addr)) {
kfree_skb(skb);
break;
@@ -1523,7 +1552,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
mdp->rx_skbuff[entry] = skb;
skb_checksum_none_assert(skb);
- rxdesc->addr = dma_addr;
+ rxdesc->addr = cpu_to_edmac(mdp, dma_addr);
}
dma_wmb(); /* RACT bit must be set after all the above writes */
if (entry >= mdp->num_rx_ring - 1)
@@ -2331,8 +2360,8 @@ static void sh_eth_tx_timeout(struct net_device *ndev)
/* Free all the skbuffs in the Rx queue. */
for (i = 0; i < mdp->num_rx_ring; i++) {
rxdesc = &mdp->rx_ring[i];
- rxdesc->status = 0;
- rxdesc->addr = 0xBADF00D0;
+ rxdesc->status = cpu_to_edmac(mdp, 0);
+ rxdesc->addr = cpu_to_edmac(mdp, 0xBADF00D0);
dev_kfree_skb(mdp->rx_skbuff[i]);
mdp->rx_skbuff[i] = NULL;
}
@@ -2350,6 +2379,7 @@ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_txdesc *txdesc;
+ dma_addr_t dma_addr;
u32 entry;
unsigned long flags;
@@ -2372,15 +2402,15 @@ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
txdesc = &mdp->tx_ring[entry];
/* soft swap. */
if (!mdp->cd->hw_swap)
- sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)),
- skb->len + 2);
- txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len,
- DMA_TO_DEVICE);
- if (dma_mapping_error(&ndev->dev, txdesc->addr)) {
+ sh_eth_soft_swap(PTR_ALIGN(skb->data, 4), skb->len + 2);
+ dma_addr = dma_map_single(&ndev->dev, skb->data, skb->len,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(&ndev->dev, dma_addr)) {
kfree_skb(skb);
return NETDEV_TX_OK;
}
- txdesc->buffer_length = skb->len;
+ txdesc->addr = cpu_to_edmac(mdp, dma_addr);
+ txdesc->len = cpu_to_edmac(mdp, skb->len << 16);
dma_wmb(); /* TACT bit must be set after all the above writes */
if (entry >= mdp->num_tx_ring - 1)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.