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author | 2023-12-08 13:10:26 +0900 | |
---|---|---|
committer | 2023-12-10 19:31:41 +0000 | |
commit | fcff581ee43078cf23216aa7079012e935a6a078 (patch) | |
tree | 7a00a3aa01a2e16417064ad0452afca05ffa5f61 /drivers/net/ethernet/renesas | |
parent | net: rswitch: Add unmap_addrs instead of dma address in each desc (diff) | |
download | linux-fcff581ee43078cf23216aa7079012e935a6a078.tar.gz linux-fcff581ee43078cf23216aa7079012e935a6a078.tar.bz2 linux-fcff581ee43078cf23216aa7079012e935a6a078.zip |
net: rswitch: Add a setting ext descriptor function
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 a setting ext descriptor function to improve code readability.
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')
-rw-r--r-- | drivers/net/ethernet/renesas/rswitch.c | 73 |
1 files changed, 47 insertions, 26 deletions
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c index c2125fefc8c5..eda5ea56674c 100644 --- a/drivers/net/ethernet/renesas/rswitch.c +++ b/drivers/net/ethernet/renesas/rswitch.c @@ -1519,6 +1519,51 @@ static int rswitch_stop(struct net_device *ndev) return 0; }; +static bool rswitch_ext_desc_set_info1(struct rswitch_device *rdev, + struct sk_buff *skb, + struct rswitch_ext_desc *desc) +{ + desc->info1 = cpu_to_le64(INFO1_DV(BIT(rdev->etha->index)) | + INFO1_IPV(GWCA_IPV_NUM) | INFO1_FMT); + if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { + struct rswitch_gwca_ts_info *ts_info; + + ts_info = kzalloc(sizeof(*ts_info), GFP_ATOMIC); + if (!ts_info) + return false; + + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + rdev->ts_tag++; + desc->info1 |= cpu_to_le64(INFO1_TSUN(rdev->ts_tag) | INFO1_TXC); + + ts_info->skb = skb_get(skb); + ts_info->port = rdev->port; + ts_info->tag = rdev->ts_tag; + list_add_tail(&ts_info->list, &rdev->priv->gwca.ts_info_list); + + skb_tx_timestamp(skb); + } + + return true; +} + +static bool rswitch_ext_desc_set(struct rswitch_device *rdev, + struct sk_buff *skb, + struct rswitch_ext_desc *desc, + dma_addr_t dma_addr, u16 len, u8 die_dt) +{ + rswitch_desc_set_dptr(&desc->desc, dma_addr); + desc->desc.info_ds = cpu_to_le16(len); + if (!rswitch_ext_desc_set_info1(rdev, skb, desc)) + return false; + + dma_wmb(); + + desc->desc.die_dt = die_dt; + + return true; +} + static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *ndev) { struct rswitch_device *rdev = netdev_priv(ndev); @@ -1542,33 +1587,9 @@ static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *nd 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); - - desc->info1 = cpu_to_le64(INFO1_DV(BIT(rdev->etha->index)) | - INFO1_IPV(GWCA_IPV_NUM) | INFO1_FMT); - if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { - struct rswitch_gwca_ts_info *ts_info; - - ts_info = kzalloc(sizeof(*ts_info), GFP_ATOMIC); - if (!ts_info) - goto err_unmap; - - skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; - rdev->ts_tag++; - desc->info1 |= cpu_to_le64(INFO1_TSUN(rdev->ts_tag) | INFO1_TXC); - - ts_info->skb = skb_get(skb); - ts_info->port = rdev->port; - ts_info->tag = rdev->ts_tag; - list_add_tail(&ts_info->list, &rdev->priv->gwca.ts_info_list); - - skb_tx_timestamp(skb); - } - - dma_wmb(); + if (!rswitch_ext_desc_set(rdev, skb, desc, dma_addr, skb->len, DT_FSINGLE | DIE)) + goto err_unmap; - desc->desc.die_dt = DT_FSINGLE | DIE; wmb(); /* gq->cur must be incremented after die_dt was set */ gq->cur = rswitch_next_queue_index(gq, true, 1); |