diff options
| author |  Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
| 2023-12-08 13:10:25 +0900 |
|---|---|---|
| committer |  David S. Miller <davem@davemloft.net>
| 2023-12-10 19:31:41 +0000 |
| commit | 271e015b91535dd87fd0f5df0cc3b906c2eddef9 (patch) | |
| tree | 0d5802fb568208b955cc99dbefd22895edf45236 /drivers/net/ethernet/renesas/rswitch.c | |
| parent | net: rswitch: Use build_skb() for RX (diff) | |
| download | linux-271e015b91535dd87fd0f5df0cc3b906c2eddef9.tar.gz linux-271e015b91535dd87fd0f5df0cc3b906c2eddef9.tar.bz2 linux-271e015b91535dd87fd0f5df0cc3b906c2eddef9.zip | |
net: rswitch: Add unmap_addrs instead of dma address in each desc
If the driver would like to transmit a jumbo frame like 2KiB or more,
it should be split into multiple queues. In the near future, to support
this, add unmap_addrs array to unmap dma mapping address instead of dma
address in each TX descriptor because the descriptors may not have
the top dma address.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/renesas/rswitch.c')
| -rw-r--r-- | drivers/net/ethernet/renesas/rswitch.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c index c6a96abe9dba..c2125fefc8c5 100644 --- a/drivers/net/ethernet/renesas/rswitch.c +++ b/drivers/net/ethernet/renesas/rswitch.c @@ -284,6 +284,8 @@ static void rswitch_gwca_queue_free(struct net_device *ndev, gq->tx_ring = NULL; kfree(gq->skbs); gq->skbs = NULL; + kfree(gq->unmap_addrs); + gq->unmap_addrs = NULL; } } @@ -322,6 +324,9 @@ static int rswitch_gwca_queue_alloc(struct net_device *ndev, gq->skbs = kcalloc(gq->ring_size, sizeof(*gq->skbs), GFP_KERNEL); if (!gq->skbs) return -ENOMEM; + gq->unmap_addrs = kcalloc(gq->ring_size, sizeof(*gq->unmap_addrs), GFP_KERNEL); + if (!gq->unmap_addrs) + goto out; gq->tx_ring = dma_alloc_coherent(ndev->dev.parent, sizeof(struct rswitch_ext_desc) * (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL); @@ -787,9 +792,7 @@ static void rswitch_tx_free(struct net_device *ndev) struct rswitch_device *rdev = netdev_priv(ndev); struct rswitch_gwca_queue *gq = rdev->tx_queue; struct rswitch_ext_desc *desc; - dma_addr_t dma_addr; struct sk_buff *skb; - unsigned int size; for (; rswitch_get_num_cur_queues(gq) > 0; gq->dirty = rswitch_next_queue_index(gq, false, 1)) { @@ -798,18 +801,17 @@ static void rswitch_tx_free(struct net_device *ndev) break; dma_rmb(); - size = le16_to_cpu(desc->desc.info_ds) & TX_DS; skb = gq->skbs[gq->dirty]; if (skb) { - dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, - size, DMA_TO_DEVICE); + dma_unmap_single(ndev->dev.parent, + gq->unmap_addrs[gq->dirty], + skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(gq->skbs[gq->dirty]); gq->skbs[gq->dirty] = NULL; + rdev->ndev->stats.tx_packets++; + rdev->ndev->stats.tx_bytes += skb->len; } desc->desc.die_dt = DT_EEMPTY; - rdev->ndev->stats.tx_packets++; - rdev->ndev->stats.tx_bytes += size; } } @@ -1538,6 +1540,7 @@ static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *nd goto err_kfree; gq->skbs[gq->cur] = skb; + gq->unmap_addrs[gq->cur] = dma_addr; desc = &gq->tx_ring[gq->cur]; rswitch_desc_set_dptr(&desc->desc, dma_addr); desc->desc.info_ds = cpu_to_le16(skb->len); |