b0687062bd
This is an automatically generated commit which aids following Kernel patch history, as git will see the move and copy as a rename thus defeating the purpose. For the original discussion see: https://lists.openwrt.org/pipermail/openwrt-devel/2023-October/041673.html Signed-off-by: Kenneth Kasilag <kenneth@kasilag.me> Link: https://github.com/openwrt/openwrt/pull/21019 Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
65 lines
2.5 KiB
Diff
65 lines
2.5 KiB
Diff
From 7b46bdaec00a675f6fac9d0b01a2105b5746ebe9 Mon Sep 17 00:00:00 2001
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From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Thu, 19 Jun 2025 09:07:25 +0200
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Subject: [PATCH 2/2] net: airoha: Differentiate hwfd buffer size for QDMA0 and
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QDMA1
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EN7581 SoC allows configuring the size and the number of buffers in
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hwfd payload queue for both QDMA0 and QDMA1.
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In order to reduce the required DRAM used for hwfd buffers queues and
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decrease the memory footprint, differentiate hwfd buffer size for QDMA0
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and QDMA1 and reduce hwfd buffer size to 1KB for QDMA1 (WAN) while
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maintaining 2KB for QDMA0 (LAN).
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Reviewed-by: Simon Horman <horms@kernel.org>
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Link: https://patch.msgid.link/20250619-airoha-hw-num-desc-v4-2-49600a9b319a@kernel.org
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/airoha/airoha_eth.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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--- a/drivers/net/ethernet/airoha/airoha_eth.c
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+++ b/drivers/net/ethernet/airoha/airoha_eth.c
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@@ -1089,14 +1089,15 @@ static int airoha_qdma_init_hfwd_queues(
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int size, index, num_desc = HW_DSCP_NUM;
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struct airoha_eth *eth = qdma->eth;
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int id = qdma - ð->qdma[0];
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+ u32 status, buf_size;
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dma_addr_t dma_addr;
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const char *name;
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- u32 status;
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name = devm_kasprintf(eth->dev, GFP_KERNEL, "qdma%d-buf", id);
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if (!name)
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return -ENOMEM;
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+ buf_size = id ? AIROHA_MAX_PACKET_SIZE / 2 : AIROHA_MAX_PACKET_SIZE;
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index = of_property_match_string(eth->dev->of_node,
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"memory-region-names", name);
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if (index >= 0) {
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@@ -1117,9 +1118,9 @@ static int airoha_qdma_init_hfwd_queues(
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/* Compute the number of hw descriptors according to the
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* reserved memory size and the payload buffer size
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*/
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- num_desc = rmem->size / AIROHA_MAX_PACKET_SIZE;
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+ num_desc = div_u64(rmem->size, buf_size);
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} else {
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- size = AIROHA_MAX_PACKET_SIZE * num_desc;
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+ size = buf_size * num_desc;
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if (!dmam_alloc_coherent(eth->dev, size, &dma_addr,
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GFP_KERNEL))
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return -ENOMEM;
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@@ -1132,9 +1133,10 @@ static int airoha_qdma_init_hfwd_queues(
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return -ENOMEM;
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airoha_qdma_wr(qdma, REG_FWD_DSCP_BASE, dma_addr);
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+ /* QDMA0: 2KB. QDMA1: 1KB */
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airoha_qdma_rmw(qdma, REG_HW_FWD_DSCP_CFG,
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HW_FWD_DSCP_PAYLOAD_SIZE_MASK,
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- FIELD_PREP(HW_FWD_DSCP_PAYLOAD_SIZE_MASK, 0));
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+ FIELD_PREP(HW_FWD_DSCP_PAYLOAD_SIZE_MASK, !!id));
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airoha_qdma_rmw(qdma, REG_FWD_DSCP_LOW_THR, FWD_DSCP_LOW_THR_MASK,
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FIELD_PREP(FWD_DSCP_LOW_THR_MASK, 128));
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airoha_qdma_rmw(qdma, REG_LMGR_INIT_CFG,
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