diff options
Diffstat (limited to 'drivers/dma/dw_dmac.c')
| -rw-r--r-- | drivers/dma/dw_dmac.c | 50 |
1 files changed, 29 insertions, 21 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 933c143b6a7..2eea823516a 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -116,7 +116,7 @@ static void dwc_sync_desc_for_cpu(struct dw_dma_chan *dwc, struct dw_desc *desc) { struct dw_desc *child; - list_for_each_entry(child, &desc->txd.tx_list, desc_node) + list_for_each_entry(child, &desc->tx_list, desc_node) dma_sync_single_for_cpu(chan2parent(&dwc->chan), child->txd.phys, sizeof(child->lli), DMA_TO_DEVICE); @@ -137,11 +137,11 @@ static void dwc_desc_put(struct dw_dma_chan *dwc, struct dw_desc *desc) dwc_sync_desc_for_cpu(dwc, desc); spin_lock_bh(&dwc->lock); - list_for_each_entry(child, &desc->txd.tx_list, desc_node) + list_for_each_entry(child, &desc->tx_list, desc_node) dev_vdbg(chan2dev(&dwc->chan), "moving child desc %p to freelist\n", child); - list_splice_init(&desc->txd.tx_list, &dwc->free_list); + list_splice_init(&desc->tx_list, &dwc->free_list); dev_vdbg(chan2dev(&dwc->chan), "moving desc %p to freelist\n", desc); list_add(&desc->desc_node, &dwc->free_list); spin_unlock_bh(&dwc->lock); @@ -209,19 +209,28 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc) param = txd->callback_param; dwc_sync_desc_for_cpu(dwc, desc); - list_splice_init(&txd->tx_list, &dwc->free_list); + list_splice_init(&desc->tx_list, &dwc->free_list); list_move(&desc->desc_node, &dwc->free_list); - /* - * We use dma_unmap_page() regardless of how the buffers were - * mapped before they were submitted... - */ - if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) - dma_unmap_page(chan2parent(&dwc->chan), desc->lli.dar, - desc->len, DMA_FROM_DEVICE); - if (!(txd->flags & DMA_COMPL_SKIP_SRC_UNMAP)) - dma_unmap_page(chan2parent(&dwc->chan), desc->lli.sar, - desc->len, DMA_TO_DEVICE); + if (!dwc->chan.private) { + struct device *parent = chan2parent(&dwc->chan); + if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) { + if (txd->flags & DMA_COMPL_DEST_UNMAP_SINGLE) + dma_unmap_single(parent, desc->lli.dar, + desc->len, DMA_FROM_DEVICE); + else + dma_unmap_page(parent, desc->lli.dar, + desc->len, DMA_FROM_DEVICE); + } + if (!(txd->flags & DMA_COMPL_SKIP_SRC_UNMAP)) { + if (txd->flags & DMA_COMPL_SRC_UNMAP_SINGLE) + dma_unmap_single(parent, desc->lli.sar, + desc->len, DMA_TO_DEVICE); + else + dma_unmap_page(parent, desc->lli.sar, + desc->len, DMA_TO_DEVICE); + } + } /* * The API requires that no submissions are done from a @@ -289,7 +298,7 @@ static void dwc_scan_descriptors(struct dw_dma *dw, struct dw_dma_chan *dwc) /* This one is currently in progress */ return; - list_for_each_entry(child, &desc->txd.tx_list, desc_node) + list_for_each_entry(child, &desc->tx_list, desc_node) if (child->lli.llp == llp) /* Currently in progress */ return; @@ -356,7 +365,7 @@ static void dwc_handle_error(struct dw_dma *dw, struct dw_dma_chan *dwc) dev_printk(KERN_CRIT, chan2dev(&dwc->chan), " cookie: %d\n", bad_desc->txd.cookie); dwc_dump_lli(dwc, &bad_desc->lli); - list_for_each_entry(child, &bad_desc->txd.tx_list, desc_node) + list_for_each_entry(child, &bad_desc->tx_list, desc_node) dwc_dump_lli(dwc, &child->lli); /* Pretend the descriptor completed successfully */ @@ -608,7 +617,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, prev->txd.phys, sizeof(prev->lli), DMA_TO_DEVICE); list_add_tail(&desc->desc_node, - &first->txd.tx_list); + &first->tx_list); } prev = desc; } @@ -658,8 +667,6 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, reg_width = dws->reg_width; prev = first = NULL; - sg_len = dma_map_sg(chan2parent(chan), sgl, sg_len, direction); - switch (direction) { case DMA_TO_DEVICE: ctllo = (DWC_DEFAULT_CTLLO @@ -700,7 +707,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, sizeof(prev->lli), DMA_TO_DEVICE); list_add_tail(&desc->desc_node, - &first->txd.tx_list); + &first->tx_list); } prev = desc; total_len += len; @@ -746,7 +753,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, sizeof(prev->lli), DMA_TO_DEVICE); list_add_tail(&desc->desc_node, - &first->txd.tx_list); + &first->tx_list); } prev = desc; total_len += len; @@ -902,6 +909,7 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) break; } + INIT_LIST_HEAD(&desc->tx_list); dma_async_tx_descriptor_init(&desc->txd, chan); desc->txd.tx_submit = dwc_tx_submit; desc->txd.flags = DMA_CTRL_ACK; |