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authorViresh Kumar <viresh.kumar@st.com>2011-08-05 15:32:43 +0530
committerVinod Koul <vinod.koul@intel.com>2011-09-19 15:13:06 +0530
commitb7f69d9d4283cfbbf7458962cf9bdba6463b831d (patch)
tree76e29e885d467486922f3b2fbd2c480a7b5a1b8f /include/linux/amba
parent937bb6e4c676fecbfbc1939b942241c3f27bf5d8 (diff)
downloadop-kernel-dev-b7f69d9d4283cfbbf7458962cf9bdba6463b831d.zip
op-kernel-dev-b7f69d9d4283cfbbf7458962cf9bdba6463b831d.tar.gz
dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers
Untill now, sg_len greater than one is not supported. This patch adds support to do that. Note: Still, if peripheral is flow controller, sg_len can't be greater that one. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'include/linux/amba')
-rw-r--r--include/linux/amba/pl08x.h22
1 files changed, 16 insertions, 6 deletions
diff --git a/include/linux/amba/pl08x.h b/include/linux/amba/pl08x.h
index a22662c..9eabffb 100644
--- a/include/linux/amba/pl08x.h
+++ b/include/linux/amba/pl08x.h
@@ -106,12 +106,24 @@ struct pl08x_phy_chan {
};
/**
+ * struct pl08x_sg - structure containing data per sg
+ * @src_addr: src address of sg
+ * @dst_addr: dst address of sg
+ * @len: transfer len in bytes
+ * @node: node for txd's dsg_list
+ */
+struct pl08x_sg {
+ dma_addr_t src_addr;
+ dma_addr_t dst_addr;
+ size_t len;
+ struct list_head node;
+};
+
+/**
* struct pl08x_txd - wrapper for struct dma_async_tx_descriptor
* @tx: async tx descriptor
* @node: node for txd list for channels
- * @src_addr: src address of txd
- * @dst_addr: dst address of txd
- * @len: transfer len in bytes
+ * @dsg_list: list of children sg's
* @direction: direction of transfer
* @llis_bus: DMA memory address (physical) start for the LLIs
* @llis_va: virtual memory address start for the LLIs
@@ -121,10 +133,8 @@ struct pl08x_phy_chan {
struct pl08x_txd {
struct dma_async_tx_descriptor tx;
struct list_head node;
+ struct list_head dsg_list;
enum dma_data_direction direction;
- dma_addr_t src_addr;
- dma_addr_t dst_addr;
- size_t len;
dma_addr_t llis_bus;
struct pl08x_lli *llis_va;
/* Default cctl value for LLIs */
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