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net: ethernet: mtk_wed: introduce mtk_wed_buf structure

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Introduce mtk_wed_buf structure to store both virtual and physical
addresses allocated in mtk_wed_tx_buffer_alloc() routine. This is a
preliminary patch to add WED support for MT7988 SoC since it relies on a
different dma descriptor layout not storing page dma addresses.

Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Lorenzo Bianconi 2023-09-18 12:29:08 +02:00 committed by Paolo Abeni
parent bafd764a8b
commit ff0ea57fa3
2 changed files with 12 additions and 7 deletions
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12
drivers/net/ethernet/mediatek/mtk_wed.c
View File

@ -300,9 +300,9 @@ out:
static int
mtk_wed_tx_buffer_alloc(struct mtk_wed_device *dev)
{
struct mtk_wed_buf *page_list;
struct mtk_wdma_desc *desc;
dma_addr_t desc_phys;
void **page_list;
int token = dev->wlan.token_start;
int ring_size;
int n_pages;
@ -343,7 +343,8 @@ mtk_wed_tx_buffer_alloc(struct mtk_wed_device *dev)
return -ENOMEM;
}
page_list[page_idx++] = page;
page_list[page_idx].p = page;
page_list[page_idx++].phy_addr = page_phys;
dma_sync_single_for_cpu(dev->hw->dev, page_phys, PAGE_SIZE,
DMA_BIDIRECTIONAL);
@ -387,8 +388,8 @@ mtk_wed_tx_buffer_alloc(struct mtk_wed_device *dev)
static void
mtk_wed_free_tx_buffer(struct mtk_wed_device *dev)
{
struct mtk_wed_buf *page_list = dev->tx_buf_ring.pages;
struct mtk_wdma_desc *desc = dev->tx_buf_ring.desc;
void **page_list = dev->tx_buf_ring.pages;
int page_idx;
int i;
@ -400,13 +401,12 @@ mtk_wed_free_tx_buffer(struct mtk_wed_device *dev)
for (i = 0, page_idx = 0; i < dev->tx_buf_ring.size;
i += MTK_WED_BUF_PER_PAGE) {
void *page = page_list[page_idx++];
dma_addr_t buf_addr;
dma_addr_t buf_addr = page_list[page_idx].phy_addr;
void *page = page_list[page_idx++].p;
if (!page)
break;
buf_addr = le32_to_cpu(desc[i].buf0);
dma_unmap_page(dev->hw->dev, buf_addr, PAGE_SIZE,
DMA_BIDIRECTIONAL);
__free_page(page);

7
include/linux/soc/mediatek/mtk_wed.h
View File

@ -76,6 +76,11 @@ struct mtk_wed_wo_rx_stats {
__le32 rx_drop_cnt;
};
struct mtk_wed_buf {
void *p;
dma_addr_t phy_addr;
};
struct mtk_wed_device {
#ifdef CONFIG_NET_MEDIATEK_SOC_WED
const struct mtk_wed_ops *ops;
@ -97,7 +102,7 @@ struct mtk_wed_device {
struct {
int size;
void **pages;
struct mtk_wed_buf *pages;
struct mtk_wdma_desc *desc;
dma_addr_t desc_phys;
} tx_buf_ring;