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wifi: mt76: Get rid of dma_sync_single_for_device() for MMIO devices

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Since the page_pool for MT76 MMIO devices are created with
PP_FLAG_DMA_SYNC_DEV flag, we do not need to sync_for_device each page
received from the pool since it is already done by the page_pool
codebase.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250625-mt76-sync-for-device-v1-1-e687e3278e1a@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2025-06-25 19:40:30 +02:00 committed by Felix Fietkau
parent 344dd6a4c9
commit 1298de13d1
2 changed files with 4 additions and 13 deletions
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11
drivers/net/wireless/mediatek/mt76/dma.c
View File

@ -643,10 +643,8 @@ mt76_dma_rx_fill_buf(struct mt76_dev *dev, struct mt76_queue *q,
while (q->queued < q->ndesc - 1) {
struct mt76_queue_buf qbuf = {};
enum dma_data_direction dir;
dma_addr_t addr;
int offset;
void *buf = NULL;
int offset;
if (mt76_queue_is_wed_rro_ind(q))
goto done;
@ -655,11 +653,8 @@ mt76_dma_rx_fill_buf(struct mt76_dev *dev, struct mt76_queue *q,
if (!buf)
break;
addr = page_pool_get_dma_addr(virt_to_head_page(buf)) + offset;
dir = page_pool_get_dma_dir(q->page_pool);
dma_sync_single_for_device(dev->dma_dev, addr, len, dir);
qbuf.addr = addr + q->buf_offset;
qbuf.addr = page_pool_get_dma_addr(virt_to_head_page(buf)) +
offset + q->buf_offset;
done:
qbuf.len = len - q->buf_offset;
qbuf.skip_unmap = false;

6
drivers/net/wireless/mediatek/mt76/wed.c
View File

@ -34,11 +34,10 @@ u32 mt76_wed_init_rx_buf(struct mtk_wed_device *wed, int size)
struct mt76_dev *dev = container_of(wed, struct mt76_dev, mmio.wed);
struct mtk_wed_bm_desc *desc = wed->rx_buf_ring.desc;
struct mt76_queue *q = &dev->q_rx[MT_RXQ_MAIN];
int i, len = SKB_WITH_OVERHEAD(q->buf_size);
struct mt76_txwi_cache *t = NULL;
int i;
for (i = 0; i < size; i++) {
enum dma_data_direction dir;
dma_addr_t addr;
u32 offset;
int token;
@ -53,9 +52,6 @@ u32 mt76_wed_init_rx_buf(struct mtk_wed_device *wed, int size)
goto unmap;
addr = page_pool_get_dma_addr(virt_to_head_page(buf)) + offset;
dir = page_pool_get_dma_dir(q->page_pool);
dma_sync_single_for_device(dev->dma_dev, addr, len, dir);
desc->buf0 = cpu_to_le32(addr);
token = mt76_rx_token_consume(dev, buf, t, addr);
if (token < 0) {