diff options
| author | Willy Tarreau <w@1wt.eu> | 2020-10-11 12:09:43 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-10-14 02:57:12 +0300 |
| commit | 73d7422813839bbcae3dd28ff0d3c48d916e0b57 (patch) | |
| tree | 01a2f1d7d9f082fbd0201893a58c6cce0029e1bf /drivers/net/ethernet/cadence/macb.h | |
| parent | fa6031df12fcbc1cd21586576046d821f2cef2e2 (diff) | |
| download | linux-73d7422813839bbcae3dd28ff0d3c48d916e0b57.tar.xz | |
macb: prepare at91 to use a 2-frame TX queue
The RM9200 supports one frame being sent while another one is waiting in
queue. This avoids the dead time that follows the emission of a frame
and which prevents one from reaching line speed.
Right now the driver supports only a single skb, so we'll first replace
the rm9200-specific skb info with an array of two macb_tx_skb (already
used by other drivers). This patch only moves the skb_length to
txq[0].size and skb_physaddr to skb[0].mapping but doesn't perform any
other change. It already uses [desc] in order to minimize future changes.
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20201011090944.10607-3-w@1wt.eu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/cadence/macb.h')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index 1dbf7d86d267..4c4672ff66a3 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -1207,10 +1207,8 @@ struct macb { phy_interface_t phy_interface; - /* AT91RM9200 transmit */ - struct sk_buff *skb; /* holds skb until xmit interrupt completes */ - dma_addr_t skb_physaddr; /* phys addr from pci_map_single */ - int skb_length; /* saved skb length for pci_unmap_single */ + /* AT91RM9200 transmit queue (1 on wire + 1 queued) */ + struct macb_tx_skb rm9200_txq[2]; unsigned int max_tx_length; u64 ethtool_stats[GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES]; |