88 lines
2.5 KiB
Diff
88 lines
2.5 KiB
Diff
From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Mon, 18 Sep 2023 12:29:08 +0200
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Subject: [PATCH] net: ethernet: mtk_wed: introduce mtk_wed_buf structure
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Introduce mtk_wed_buf structure to store both virtual and physical
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addresses allocated in mtk_wed_tx_buffer_alloc() routine. This is a
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preliminary patch to add WED support for MT7988 SoC since it relies on a
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different dma descriptor layout not storing page dma addresses.
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Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
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Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_wed.c
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+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
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@@ -299,9 +299,9 @@ out:
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static int
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mtk_wed_tx_buffer_alloc(struct mtk_wed_device *dev)
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{
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+ struct mtk_wed_buf *page_list;
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struct mtk_wdma_desc *desc;
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dma_addr_t desc_phys;
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- void **page_list;
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int token = dev->wlan.token_start;
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int ring_size;
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int n_pages;
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@@ -342,7 +342,8 @@ mtk_wed_tx_buffer_alloc(struct mtk_wed_d
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return -ENOMEM;
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}
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- page_list[page_idx++] = page;
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+ page_list[page_idx].p = page;
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+ page_list[page_idx++].phy_addr = page_phys;
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dma_sync_single_for_cpu(dev->hw->dev, page_phys, PAGE_SIZE,
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DMA_BIDIRECTIONAL);
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@@ -386,8 +387,8 @@ mtk_wed_tx_buffer_alloc(struct mtk_wed_d
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static void
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mtk_wed_free_tx_buffer(struct mtk_wed_device *dev)
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{
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+ struct mtk_wed_buf *page_list = dev->tx_buf_ring.pages;
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struct mtk_wdma_desc *desc = dev->tx_buf_ring.desc;
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- void **page_list = dev->tx_buf_ring.pages;
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int page_idx;
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int i;
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@@ -399,13 +400,12 @@ mtk_wed_free_tx_buffer(struct mtk_wed_de
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for (i = 0, page_idx = 0; i < dev->tx_buf_ring.size;
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i += MTK_WED_BUF_PER_PAGE) {
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- void *page = page_list[page_idx++];
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- dma_addr_t buf_addr;
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+ dma_addr_t buf_addr = page_list[page_idx].phy_addr;
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+ void *page = page_list[page_idx++].p;
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if (!page)
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break;
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- buf_addr = le32_to_cpu(desc[i].buf0);
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dma_unmap_page(dev->hw->dev, buf_addr, PAGE_SIZE,
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DMA_BIDIRECTIONAL);
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__free_page(page);
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--- a/include/linux/soc/mediatek/mtk_wed.h
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+++ b/include/linux/soc/mediatek/mtk_wed.h
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@@ -76,6 +76,11 @@ struct mtk_wed_wo_rx_stats {
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__le32 rx_drop_cnt;
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};
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+struct mtk_wed_buf {
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+ void *p;
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+ dma_addr_t phy_addr;
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+};
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+
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struct mtk_wed_device {
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#ifdef CONFIG_NET_MEDIATEK_SOC_WED
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const struct mtk_wed_ops *ops;
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@@ -97,7 +102,7 @@ struct mtk_wed_device {
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struct {
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int size;
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- void **pages;
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+ struct mtk_wed_buf *pages;
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struct mtk_wdma_desc *desc;
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dma_addr_t desc_phys;
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} tx_buf_ring;
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