Messages in this thread Patch in this message | | | From | Hemanth Puranik <> | Subject | [PATCH] net: qcom/emac: Use proper free methods during TX | Date | Tue, 6 Mar 2018 08:18:06 +0530 |
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This patch fixes the warning messages/call traces seen if DMA debug is enabled, In case of fragmented skb's memory was allocated using dma_map_page but freed using dma_unmap_single. This patch modifies buffer allocations in TX path to use dma_map_page in all the places and dma_unmap_page while freeing the buffers.
Signed-off-by: Hemanth Puranik <hpuranik@codeaurora.org> --- drivers/net/ethernet/qualcomm/emac/emac-mac.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c index 9cbb2726..d5a32b7 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c @@ -1194,9 +1194,9 @@ void emac_mac_tx_process(struct emac_adapter *adpt, struct emac_tx_queue *tx_q) while (tx_q->tpd.consume_idx != hw_consume_idx) { tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.consume_idx); if (tpbuf->dma_addr) { - dma_unmap_single(adpt->netdev->dev.parent, - tpbuf->dma_addr, tpbuf->length, - DMA_TO_DEVICE); + dma_unmap_page(adpt->netdev->dev.parent, + tpbuf->dma_addr, tpbuf->length, + DMA_TO_DEVICE); tpbuf->dma_addr = 0; } @@ -1353,9 +1353,11 @@ static void emac_tx_fill_tpd(struct emac_adapter *adpt, tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx); tpbuf->length = mapped_len; - tpbuf->dma_addr = dma_map_single(adpt->netdev->dev.parent, - skb->data, tpbuf->length, - DMA_TO_DEVICE); + tpbuf->dma_addr = dma_map_page(adpt->netdev->dev.parent, + virt_to_page(skb->data), + offset_in_page(skb->data), + tpbuf->length, + DMA_TO_DEVICE); ret = dma_mapping_error(adpt->netdev->dev.parent, tpbuf->dma_addr); if (ret) @@ -1371,9 +1373,12 @@ static void emac_tx_fill_tpd(struct emac_adapter *adpt, if (mapped_len < len) { tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx); tpbuf->length = len - mapped_len; - tpbuf->dma_addr = dma_map_single(adpt->netdev->dev.parent, - skb->data + mapped_len, - tpbuf->length, DMA_TO_DEVICE); + tpbuf->dma_addr = dma_map_page(adpt->netdev->dev.parent, + virt_to_page(skb->data + + mapped_len), + offset_in_page(skb->data + + mapped_len), + tpbuf->length, DMA_TO_DEVICE); ret = dma_mapping_error(adpt->netdev->dev.parent, tpbuf->dma_addr); if (ret) -- Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
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