diff options
| author | Felix Fietkau <nbd@nbd.name> | 2021-04-22 22:21:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-23 13:31:58 -0700 |
| commit | 4e6bf609569c59b6bd6acf4a607c096cbd820d79 (patch) | |
| tree | d7b6e993b68b1a25fbd2b952d0d9cea1f424356f /drivers/net/ethernet/mediatek/mtk_eth_soc.h | |
| parent | e9229ffd550b2d8c4997c67a501dbc3919fd4e26 (diff) | |
net: ethernet: mtk_eth_soc: cache HW pointer of last freed TX descriptor
The value is only updated by the CPU, so it is cheaper to access from the
ring data structure than from a hardware register.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mediatek/mtk_eth_soc.h')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index ceb5a4a661e6..6b92dd6c2cda 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -642,6 +642,7 @@ struct mtk_tx_buf { * @phys: The physical addr of tx_buf * @next_free: Pointer to the next free descriptor * @last_free: Pointer to the last free descriptor + * @last_free_ptr: Hardware pointer value of the last free descriptor * @thresh: The threshold of minimum amount of free descriptors * @free_count: QDMA uses a linked list. Track how many free descriptors * are present @@ -652,6 +653,7 @@ struct mtk_tx_ring { dma_addr_t phys; struct mtk_tx_dma *next_free; struct mtk_tx_dma *last_free; + u32 last_free_ptr; u16 thresh; atomic_t free_count; int dma_size; |