priv->tx_skb[q] = NULL;
/* Free aligned TX buffers */
- if (priv->tx_buffers[q]) {
- for (i = 0; i < priv->num_tx_ring[q]; i++)
- kfree(priv->tx_buffers[q][i]);
- }
- kfree(priv->tx_buffers[q]);
- priv->tx_buffers[q] = NULL;
+ kfree(priv->tx_align[q]);
+ priv->tx_align[q] = NULL;
if (priv->rx_ring[q]) {
ring_size = sizeof(struct ravb_ex_rx_desc) *
if (priv->tx_ring[q]) {
ring_size = sizeof(struct ravb_tx_desc) *
- (priv->num_tx_ring[q] + 1);
+ (priv->num_tx_ring[q] * NUM_TX_DESC + 1);
dma_free_coherent(NULL, ring_size, priv->tx_ring[q],
priv->tx_desc_dma[q]);
priv->tx_ring[q] = NULL;
static void ravb_ring_format(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
- struct ravb_ex_rx_desc *rx_desc = NULL;
- struct ravb_tx_desc *tx_desc = NULL;
- struct ravb_desc *desc = NULL;
+ struct ravb_ex_rx_desc *rx_desc;
+ struct ravb_tx_desc *tx_desc;
+ struct ravb_desc *desc;
int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
- int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q];
+ int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q] *
+ NUM_TX_DESC;
dma_addr_t dma_addr;
int i;
memset(priv->tx_ring[q], 0, tx_ring_size);
/* Build TX ring buffer */
- for (i = 0; i < priv->num_tx_ring[q]; i++) {
- tx_desc = &priv->tx_ring[q][i];
+ for (i = 0, tx_desc = priv->tx_ring[q]; i < priv->num_tx_ring[q];
+ i++, tx_desc++) {
+ tx_desc->die_dt = DT_EEMPTY;
+ tx_desc++;
tx_desc->die_dt = DT_EEMPTY;
}
- tx_desc = &priv->tx_ring[q][i];
tx_desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
tx_desc->die_dt = DT_LINKFIX; /* type */
struct ravb_private *priv = netdev_priv(ndev);
struct sk_buff *skb;
int ring_size;
- void *buffer;
int i;
/* Allocate RX and TX skb rings */
}
/* Allocate rings for the aligned buffers */
- priv->tx_buffers[q] = kcalloc(priv->num_tx_ring[q],
- sizeof(*priv->tx_buffers[q]), GFP_KERNEL);
- if (!priv->tx_buffers[q])
+ priv->tx_align[q] = kmalloc(DPTR_ALIGN * priv->num_tx_ring[q] +
+ DPTR_ALIGN - 1, GFP_KERNEL);
+ if (!priv->tx_align[q])
goto error;
- for (i = 0; i < priv->num_tx_ring[q]; i++) {
- buffer = kmalloc(PKT_BUF_SZ + RAVB_ALIGN - 1, GFP_KERNEL);
- if (!buffer)
- goto error;
- /* Aligned TX buffer */
- priv->tx_buffers[q][i] = buffer;
- }
-
/* Allocate all RX descriptors. */
ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
priv->rx_ring[q] = dma_alloc_coherent(NULL, ring_size,
priv->dirty_rx[q] = 0;
/* Allocate all TX descriptors. */
- ring_size = sizeof(struct ravb_tx_desc) * (priv->num_tx_ring[q] + 1);
+ ring_size = sizeof(struct ravb_tx_desc) *
+ (priv->num_tx_ring[q] * NUM_TX_DESC + 1);
priv->tx_ring[q] = dma_alloc_coherent(NULL, ring_size,
&priv->tx_desc_dma[q],
GFP_KERNEL);
struct net_device_stats *stats = &priv->stats[q];
struct ravb_tx_desc *desc;
int free_num = 0;
- int entry = 0;
+ int entry;
u32 size;
for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) {
- entry = priv->dirty_tx[q] % priv->num_tx_ring[q];
+ entry = priv->dirty_tx[q] % (priv->num_tx_ring[q] *
+ NUM_TX_DESC);
desc = &priv->tx_ring[q][entry];
if (desc->die_dt != DT_FEMPTY)
break;
dma_rmb();
size = le16_to_cpu(desc->ds_tagl) & TX_DS;
/* Free the original skb. */
- if (priv->tx_skb[q][entry]) {
+ if (priv->tx_skb[q][entry / NUM_TX_DESC]) {
dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
size, DMA_TO_DEVICE);
- dev_kfree_skb_any(priv->tx_skb[q][entry]);
- priv->tx_skb[q][entry] = NULL;
+ /* Last packet descriptor? */
+ if (entry % NUM_TX_DESC == NUM_TX_DESC - 1) {
+ entry /= NUM_TX_DESC;
+ dev_kfree_skb_any(priv->tx_skb[q][entry]);
+ priv->tx_skb[q][entry] = NULL;
+ stats->tx_packets++;
+ }
free_num++;
}
- stats->tx_packets++;
stats->tx_bytes += size;
desc->die_dt = DT_EEMPTY;
}
struct sk_buff *skb;
dma_addr_t dma_addr;
struct timespec64 ts;
- u16 pkt_len = 0;
u8 desc_status;
+ u16 pkt_len;
int limit;
boguscnt = min(boguscnt, *quota);
static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
- struct ravb_tstamp_skb *ts_skb = NULL;
u16 q = skb_get_queue_mapping(skb);
+ struct ravb_tstamp_skb *ts_skb;
struct ravb_tx_desc *desc;
unsigned long flags;
u32 dma_addr;
void *buffer;
u32 entry;
+ u32 len;
spin_lock_irqsave(&priv->lock, flags);
- if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q]) {
+ if (priv->cur_tx[q] - priv->dirty_tx[q] > (priv->num_tx_ring[q] - 1) *
+ NUM_TX_DESC) {
netif_err(priv, tx_queued, ndev,
"still transmitting with the full ring!\n");
netif_stop_subqueue(ndev, q);
spin_unlock_irqrestore(&priv->lock, flags);
return NETDEV_TX_BUSY;
}
- entry = priv->cur_tx[q] % priv->num_tx_ring[q];
- priv->tx_skb[q][entry] = skb;
+ entry = priv->cur_tx[q] % (priv->num_tx_ring[q] * NUM_TX_DESC);
+ priv->tx_skb[q][entry / NUM_TX_DESC] = skb;
if (skb_put_padto(skb, ETH_ZLEN))
goto drop;
- buffer = PTR_ALIGN(priv->tx_buffers[q][entry], RAVB_ALIGN);
- memcpy(buffer, skb->data, skb->len);
- desc = &priv->tx_ring[q][entry];
- desc->ds_tagl = cpu_to_le16(skb->len);
- dma_addr = dma_map_single(&ndev->dev, buffer, skb->len, DMA_TO_DEVICE);
+ buffer = PTR_ALIGN(priv->tx_align[q], DPTR_ALIGN) +
+ entry / NUM_TX_DESC * DPTR_ALIGN;
+ len = PTR_ALIGN(skb->data, DPTR_ALIGN) - skb->data;
+ memcpy(buffer, skb->data, len);
+ dma_addr = dma_map_single(&ndev->dev, buffer, len, DMA_TO_DEVICE);
if (dma_mapping_error(&ndev->dev, dma_addr))
goto drop;
+
+ desc = &priv->tx_ring[q][entry];
+ desc->ds_tagl = cpu_to_le16(len);
+ desc->dptr = cpu_to_le32(dma_addr);
+
+ buffer = skb->data + len;
+ len = skb->len - len;
+ dma_addr = dma_map_single(&ndev->dev, buffer, len, DMA_TO_DEVICE);
+ if (dma_mapping_error(&ndev->dev, dma_addr))
+ goto unmap;
+
+ desc++;
+ desc->ds_tagl = cpu_to_le16(len);
desc->dptr = cpu_to_le32(dma_addr);
/* TX timestamp required */
if (q == RAVB_NC) {
ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
if (!ts_skb) {
- dma_unmap_single(&ndev->dev, dma_addr, skb->len,
+ desc--;
+ dma_unmap_single(&ndev->dev, dma_addr, len,
DMA_TO_DEVICE);
- goto drop;
+ goto unmap;
}
ts_skb->skb = skb;
ts_skb->tag = priv->ts_skb_tag++;
/* Descriptor type must be set after all the above writes */
dma_wmb();
- desc->die_dt = DT_FSINGLE;
+ desc->die_dt = DT_FEND;
+ desc--;
+ desc->die_dt = DT_FSTART;
ravb_write(ndev, ravb_read(ndev, TCCR) | (TCCR_TSRQ0 << q), TCCR);
- priv->cur_tx[q]++;
- if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q] &&
- !ravb_tx_free(ndev, q))
+ priv->cur_tx[q] += NUM_TX_DESC;
+ if (priv->cur_tx[q] - priv->dirty_tx[q] >
+ (priv->num_tx_ring[q] - 1) * NUM_TX_DESC && !ravb_tx_free(ndev, q))
netif_stop_subqueue(ndev, q);
exit:
spin_unlock_irqrestore(&priv->lock, flags);
return NETDEV_TX_OK;
+unmap:
+ dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
+ le16_to_cpu(desc->ds_tagl), DMA_TO_DEVICE);
drop:
dev_kfree_skb_any(skb);
- priv->tx_skb[q][entry] = NULL;
+ priv->tx_skb[q][entry / NUM_TX_DESC] = NULL;
goto exit;
}
projects / linux-beck.git / blobdiff