dmaengine: dma40: Add support to split up large elements

The maximum transfer size of the stedma40 is (64k-1) x data-width.
If the transfer size of one element exceeds this limit
the job is split up and sent as linked transfer.

Signed-off-by: Per Forlin <per.forlin@linaro.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 19 insertions, 17 deletions

diff --git a/drivers/dma/ste_dma40_ll.h b/drivers/dma/ste_dma40_ll.h
index 9e419b907544..9cc43495bea2 100644
--- a/drivers/dma/ste_dma40_ll.h
+++ b/drivers/dma/ste_dma40_ll.h
@@ -292,18 +292,20 @@ int d40_phy_sg_to_lli(struct scatterlist *sg,
                       struct d40_phy_lli *lli,
                       dma_addr_t lli_phys,
                       u32 reg_cfg,
-                      u32 data_width,
+                      u32 data_width1,
+                      u32 data_width2,
                       int psize);
 
-int d40_phy_fill_lli(struct d40_phy_lli *lli,
-                     dma_addr_t data,
-                     u32 data_size,
-                     int psize,
-                     dma_addr_t next_lli,
-                     u32 reg_cfg,
-                     bool term_int,
-                     u32 data_width,
-                     bool is_device);
+struct d40_phy_lli *d40_phy_buf_to_lli(struct d40_phy_lli *lli,
+                                       dma_addr_t data,
+                                       u32 data_size,
+                                       int psize,
+                                       dma_addr_t next_lli,
+                                       u32 reg_cfg,
+                                       bool term_int,
+                                       u32 data_width1,
+                                       u32 data_width2,
+                                       bool is_device);
 
 void d40_phy_lli_write(void __iomem *virtbase,
                        u32 phy_chan_num,
@@ -312,12 +314,12 @@ void d40_phy_lli_write(void __iomem *virtbase,
 
 /* Logical channels */
 
-void d40_log_fill_lli(struct d40_log_lli *lli,
-                      dma_addr_t data,
-                      u32 data_size,
-                      u32 reg_cfg,
-                      u32 data_width,
-                      bool addr_inc);
+struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
+                                       dma_addr_t addr,
+                                       int size,
+                                       u32 lcsp13, /* src or dst*/
+                                       u32 data_width1, u32 data_width2,
+                                       bool addr_inc);
 
 int d40_log_sg_to_dev(struct scatterlist *sg,
                       int sg_len,
@@ -332,7 +334,7 @@ int d40_log_sg_to_lli(struct scatterlist *sg,
                       int sg_len,
                       struct d40_log_lli *lli_sg,
                       u32 lcsp13, /* src or dst*/
-                      u32 data_width);
+                      u32 data_width1, u32 data_width2);
 
 void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
                             struct d40_log_lli *lli_dst,