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net: airoha: Add missing cleanup bits in airoha_qdma_cleanup_rx_queue()

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In order to properly cleanup hw rx QDMA queues and bring the device to
the initial state, reset rx DMA queue head/tail index. Moreover, reset
queued DMA descriptor fields.

Fixes: 23020f0493 ("net: airoha: Introduce ethernet support for EN7581 SoC")
Tested-by: Madhur Agrawal <Madhur.Agrawal@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260327-airoha_qdma_cleanup_rx_queue-fix-v1-1-369d6ab1511a@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lorenzo Bianconi
2026-03-27 10:48:21 +01:00
committed by Jakub Kicinski
parent fd63f18597
commit 514aac3599
1 changed files with 17 additions and 1 deletions
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18
drivers/net/ethernet/airoha/airoha_eth.c
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@@ -794,18 +794,34 @@ static int airoha_qdma_init_rx_queue(struct airoha_queue *q,
static void airoha_qdma_cleanup_rx_queue(struct airoha_queue *q)
{
struct airoha_eth *eth = q->qdma->eth;
struct airoha_qdma *qdma = q->qdma;
struct airoha_eth *eth = qdma->eth;
int qid = q - &qdma->q_rx[0];
while (q->queued) {
struct airoha_queue_entry *e = &q->entry[q->tail];
struct airoha_qdma_desc *desc = &q->desc[q->tail];
struct page *page = virt_to_head_page(e->buf);
dma_sync_single_for_cpu(eth->dev, e->dma_addr, e->dma_len,
page_pool_get_dma_dir(q->page_pool));
page_pool_put_full_page(q->page_pool, page, false);
/* Reset DMA descriptor */
WRITE_ONCE(desc->ctrl, 0);
WRITE_ONCE(desc->addr, 0);
WRITE_ONCE(desc->data, 0);
WRITE_ONCE(desc->msg0, 0);
WRITE_ONCE(desc->msg1, 0);
WRITE_ONCE(desc->msg2, 0);
WRITE_ONCE(desc->msg3, 0);
q->tail = (q->tail + 1) % q->ndesc;
q->queued--;
}
q->head = q->tail;
airoha_qdma_rmw(qdma, REG_RX_DMA_IDX(qid), RX_RING_DMA_IDX_MASK,
FIELD_PREP(RX_RING_DMA_IDX_MASK, q->tail));
}
static int airoha_qdma_init_rx(struct airoha_qdma *qdma)