From 54f8d501e842879143e867e70996574a54d1e130 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Fri, 18 Oct 2013 19:35:32 +0200 Subject: dmaengine: remove DMA unmap from drivers Remove support for DMA unmapping from drivers as it is no longer needed (DMA core code is now handling it). Cc: Vinod Koul Cc: Tomasz Figa Cc: Dave Jiang Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Kyungmin Park [djbw: fix up chan2parent() unused warning in drivers/dma/dw/core.c] Signed-off-by: Dan Williams --- drivers/dma/mv_xor.c | 44 +------------------------------------------- 1 file changed, 1 insertion(+), 43 deletions(-) (limited to 'drivers/dma/mv_xor.c') diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index ed1ab1d0875e..17326e780e23 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -60,14 +60,6 @@ static u32 mv_desc_get_dest_addr(struct mv_xor_desc_slot *desc) return hw_desc->phy_dest_addr; } -static u32 mv_desc_get_src_addr(struct mv_xor_desc_slot *desc, - int src_idx) -{ - struct mv_xor_desc *hw_desc = desc->hw_desc; - return hw_desc->phy_src_addr[mv_phy_src_idx(src_idx)]; -} - - static void mv_desc_set_byte_count(struct mv_xor_desc_slot *desc, u32 byte_count) { @@ -279,42 +271,8 @@ mv_xor_run_tx_complete_actions(struct mv_xor_desc_slot *desc, desc->async_tx.callback_param); dma_descriptor_unmap(&desc->async_tx); - /* unmap dma addresses - * (unmap_single vs unmap_page?) - */ - if (desc->group_head && desc->unmap_len) { - struct mv_xor_desc_slot *unmap = desc->group_head; - struct device *dev = mv_chan_to_devp(mv_chan); - u32 len = unmap->unmap_len; - enum dma_ctrl_flags flags = desc->async_tx.flags; - u32 src_cnt; - dma_addr_t addr; - dma_addr_t dest; - - src_cnt = unmap->unmap_src_cnt; - dest = mv_desc_get_dest_addr(unmap); - if (!(flags & DMA_COMPL_SKIP_DEST_UNMAP)) { - enum dma_data_direction dir; - - if (src_cnt > 1) /* is xor ? */ - dir = DMA_BIDIRECTIONAL; - else - dir = DMA_FROM_DEVICE; - dma_unmap_page(dev, dest, len, dir); - } - - if (!(flags & DMA_COMPL_SKIP_SRC_UNMAP)) { - while (src_cnt--) { - addr = mv_desc_get_src_addr(unmap, - src_cnt); - if (addr == dest) - continue; - dma_unmap_page(dev, addr, len, - DMA_TO_DEVICE); - } - } + if (desc->group_head) desc->group_head = NULL; - } } /* run dependent operations */ -- cgit v1.2.3