diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/610-v5.13-46-net-ethernet-mtk_eth_soc-cache-HW-pointer-of-last-fr.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/610-v5.13-46-net-ethernet-mtk_eth_soc-cache-HW-pointer-of-last-fr.patch | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/target/linux/generic/backport-5.10/610-v5.13-46-net-ethernet-mtk_eth_soc-cache-HW-pointer-of-last-fr.patch b/target/linux/generic/backport-5.10/610-v5.13-46-net-ethernet-mtk_eth_soc-cache-HW-pointer-of-last-fr.patch deleted file mode 100644 index 69f8536f0a..0000000000 --- a/target/linux/generic/backport-5.10/610-v5.13-46-net-ethernet-mtk_eth_soc-cache-HW-pointer-of-last-fr.patch +++ /dev/null @@ -1,73 +0,0 @@ -From 4e6bf609569c59b6bd6acf4a607c096cbd820d79 Mon Sep 17 00:00:00 2001 -From: Felix Fietkau <nbd@nbd.name> -Date: Thu, 22 Apr 2021 22:21:03 -0700 -Subject: [PATCH] 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> ---- - drivers/net/ethernet/mediatek/mtk_eth_soc.c | 8 ++++---- - drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 ++ - 2 files changed, 6 insertions(+), 4 deletions(-) - ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c -@@ -1400,7 +1400,7 @@ static int mtk_poll_tx_qdma(struct mtk_e - struct mtk_tx_buf *tx_buf; - u32 cpu, dma; - -- cpu = mtk_r32(eth, MTK_QTX_CRX_PTR); -+ cpu = ring->last_free_ptr; - dma = mtk_r32(eth, MTK_QTX_DRX_PTR); - - desc = mtk_qdma_phys_to_virt(ring, cpu); -@@ -1434,6 +1434,7 @@ static int mtk_poll_tx_qdma(struct mtk_e - cpu = next_cpu; - } - -+ ring->last_free_ptr = cpu; - mtk_w32(eth, cpu, MTK_QTX_CRX_PTR); - - return budget; -@@ -1634,6 +1635,7 @@ static int mtk_tx_alloc(struct mtk_eth * - atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); - ring->next_free = &ring->dma[0]; - ring->last_free = &ring->dma[MTK_DMA_SIZE - 1]; -+ ring->last_free_ptr = (u32)(ring->phys + ((MTK_DMA_SIZE - 1) * sz)); - ring->thresh = MAX_SKB_FRAGS; - - /* make sure that all changes to the dma ring are flushed before we -@@ -1647,9 +1649,7 @@ static int mtk_tx_alloc(struct mtk_eth * - mtk_w32(eth, - ring->phys + ((MTK_DMA_SIZE - 1) * sz), - MTK_QTX_CRX_PTR); -- mtk_w32(eth, -- ring->phys + ((MTK_DMA_SIZE - 1) * sz), -- MTK_QTX_DRX_PTR); -+ mtk_w32(eth, ring->last_free_ptr, MTK_QTX_DRX_PTR); - mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, - MTK_QTX_CFG(0)); - } else { ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h -@@ -657,6 +657,7 @@ 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 -@@ -667,6 +668,7 @@ 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; |