diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/770-08-net-ethernet-mtk_eth_soc-cache-hardware-pointer-of-l.patch')
-rw-r--r-- | target/linux/generic/pending-5.4/770-08-net-ethernet-mtk_eth_soc-cache-hardware-pointer-of-l.patch | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/target/linux/generic/pending-5.4/770-08-net-ethernet-mtk_eth_soc-cache-hardware-pointer-of-l.patch b/target/linux/generic/pending-5.4/770-08-net-ethernet-mtk_eth_soc-cache-hardware-pointer-of-l.patch deleted file mode 100644 index b280b6cf4b..0000000000 --- a/target/linux/generic/pending-5.4/770-08-net-ethernet-mtk_eth_soc-cache-hardware-pointer-of-l.patch +++ /dev/null @@ -1,67 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Date: Thu, 27 Aug 2020 06:32:03 +0200 -Subject: [PATCH] net: ethernet: mtk_eth_soc: cache hardware 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> ---- - ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c -@@ -1379,7 +1379,7 @@ 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); -@@ -1413,6 +1413,7 @@ 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; -@@ -1613,6 +1614,7 @@ 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 -@@ -1626,9 +1628,7 @@ 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 -@@ -644,6 +644,7 @@ 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 -@@ -654,6 +655,7 @@ 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; |