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dw_dmac: introduce total_len field in struct dw_desc

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By this new field we distinguish a total length of the chain and the individual
length of each descriptor in the chain.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2013-01-25 11:48:01 +02:00 committed by Vinod Koul
parent fdf475fa40
commit 30d38a3286
2 changed files with 7 additions and 6 deletions
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12
drivers/dma/dw_dmac.c
View File

@ -333,18 +333,18 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
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);
desc->total_len, DMA_FROM_DEVICE);
else
dma_unmap_page(parent, desc->lli.dar,
desc->len, DMA_FROM_DEVICE);
desc->total_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);
desc->total_len, DMA_TO_DEVICE);
else
dma_unmap_page(parent, desc->lli.sar,
desc->len, DMA_TO_DEVICE);
desc->total_len, DMA_TO_DEVICE);
}
}
@ -774,7 +774,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
prev->lli.llp = 0;
first->txd.flags = flags;
first->len = len;
first->total_len = len;
return &first->txd;
@ -937,7 +937,7 @@ slave_sg_fromdev_fill_desc:
prev->lli.ctllo |= DWC_CTLL_INT_EN;
prev->lli.llp = 0;
first->len = total_len;
first->total_len = total_len;
return &first->txd;

1
drivers/dma/dw_dmac_regs.h
View File

@ -296,6 +296,7 @@ struct dw_desc {
struct list_head tx_list;
struct dma_async_tx_descriptor txd;
size_t len;
size_t total_len;
};
#define to_dw_desc(h) list_entry(h, struct dw_desc, desc_node)