kernel: delete Linux 5.4 config and patches

[openwrt/openwrt.git] / target / linux / generic / pending-5.4 / 770-08-net-ethernet-mtk_eth_soc-cache-hardware-pointer-of-l.patch

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 (file)
index b280b6c..0000000
--- 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;