dma40: unify d40_log_sg_to_lli funcs for mem and slave
Rabin Vincent [Tue, 25 Jan 2011 10:18:26 +0000 (11:18 +0100)]
Acked-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/dma/ste_dma40.c
drivers/dma/ste_dma40_ll.c
drivers/dma/ste_dma40_ll.h

index 6a7a00d..c597dba 100644 (file)
@@ -1638,37 +1638,28 @@ d40_prep_sg_log(struct d40_chan *chan, struct d40_desc *desc,
                unsigned int sg_len, enum dma_data_direction direction,
                dma_addr_t dev_addr)
 {
+       dma_addr_t src_dev_addr = direction == DMA_FROM_DEVICE ? dev_addr : 0;
+       dma_addr_t dst_dev_addr = direction == DMA_TO_DEVICE ? dev_addr : 0;
        struct stedma40_chan_cfg *cfg = &chan->dma_cfg;
        struct stedma40_half_channel_info *src_info = &cfg->src_info;
        struct stedma40_half_channel_info *dst_info = &cfg->dst_info;
+       int ret;
 
-       if (direction == DMA_NONE) {
-               /* memcpy */
-               (void) d40_log_sg_to_lli(sg_src, sg_len,
-                                        desc->lli_log.src,
-                                        chan->log_def.lcsp1,
-                                        src_info->data_width,
-                                        dst_info->data_width);
-
-               (void) d40_log_sg_to_lli(sg_dst, sg_len,
-                                        desc->lli_log.dst,
-                                        chan->log_def.lcsp3,
-                                        dst_info->data_width,
-                                        src_info->data_width);
-       } else {
-               unsigned int total_size;
+       ret = d40_log_sg_to_lli(sg_src, sg_len,
+                               src_dev_addr,
+                               desc->lli_log.src,
+                               chan->log_def.lcsp1,
+                               src_info->data_width,
+                               dst_info->data_width);
 
-               total_size = d40_log_sg_to_dev(sg_src, sg_len,
-                                              &desc->lli_log,
-                                              &chan->log_def,
-                                              src_info->data_width,
-                                              dst_info->data_width,
-                                              direction, dev_addr);
-               if (total_size < 0)
-                       return -EINVAL;
-       }
+       ret = d40_log_sg_to_lli(sg_dst, sg_len,
+                               dst_dev_addr,
+                               desc->lli_log.dst,
+                               chan->log_def.lcsp3,
+                               dst_info->data_width,
+                               src_info->data_width);
 
-       return 0;
+       return ret < 0 ? ret : 0;
 }
 
 static int
index fa6c3ab..9935c6d 100644 (file)
@@ -369,53 +369,6 @@ static void d40_log_fill_lli(struct d40_log_lli *lli,
 
 }
 
-int d40_log_sg_to_dev(struct scatterlist *sg,
-                     int sg_len,
-                     struct d40_log_lli_bidir *lli,
-                     struct d40_def_lcsp *lcsp,
-                     u32 src_data_width,
-                     u32 dst_data_width,
-                     enum dma_data_direction direction,
-                     dma_addr_t dev_addr)
-{
-       int total_size = 0;
-       struct scatterlist *current_sg = sg;
-       int i;
-       struct d40_log_lli *lli_src = lli->src;
-       struct d40_log_lli *lli_dst = lli->dst;
-
-       for_each_sg(sg, current_sg, sg_len, i) {
-               dma_addr_t sg_addr = sg_dma_address(current_sg);
-               unsigned int len = sg_dma_len(current_sg);
-               dma_addr_t src;
-               dma_addr_t dst;
-
-               total_size += len;
-
-               if (direction == DMA_TO_DEVICE) {
-                       src = sg_addr;
-                       dst = dev_addr;
-               } else {
-                       src = dev_addr;
-                       dst = sg_addr;
-               }
-
-               lli_src = d40_log_buf_to_lli(lli_src, src, len,
-                                            lcsp->lcsp1,
-                                            src_data_width,
-                                            dst_data_width,
-                                            src == sg_addr);
-
-               lli_dst = d40_log_buf_to_lli(lli_dst, dst, len,
-                                            lcsp->lcsp3,
-                                            dst_data_width,
-                                            src_data_width,
-                                            dst == sg_addr);
-       }
-
-       return total_size;
-}
-
 struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
                                       dma_addr_t addr,
                                       int size,
@@ -447,6 +400,7 @@ struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
 
 int d40_log_sg_to_lli(struct scatterlist *sg,
                      int sg_len,
+                     dma_addr_t dev_addr,
                      struct d40_log_lli *lli_sg,
                      u32 lcsp13, /* src or dst*/
                      u32 data_width1, u32 data_width2)
@@ -455,14 +409,21 @@ int d40_log_sg_to_lli(struct scatterlist *sg,
        struct scatterlist *current_sg = sg;
        int i;
        struct d40_log_lli *lli = lli_sg;
+       bool autoinc = !dev_addr;
 
        for_each_sg(sg, current_sg, sg_len, i) {
+               dma_addr_t sg_addr = sg_dma_address(current_sg);
+               unsigned int len = sg_dma_len(current_sg);
+               dma_addr_t addr = dev_addr ?: sg_addr;
+
                total_size += sg_dma_len(current_sg);
-               lli = d40_log_buf_to_lli(lli,
-                                        sg_dma_address(current_sg),
-                                        sg_dma_len(current_sg),
+
+               lli = d40_log_buf_to_lli(lli, addr, len,
                                         lcsp13,
-                                        data_width1, data_width2, true);
+                                        data_width1,
+                                        data_width2,
+                                        autoinc);
        }
+
        return total_size;
 }
index 46578a6..867f23f 100644 (file)
@@ -321,17 +321,9 @@ struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
                                       u32 data_width1, u32 data_width2,
                                       bool addr_inc);
 
-int d40_log_sg_to_dev(struct scatterlist *sg,
-                     int sg_len,
-                     struct d40_log_lli_bidir *lli,
-                     struct d40_def_lcsp *lcsp,
-                     u32 src_data_width,
-                     u32 dst_data_width,
-                     enum dma_data_direction direction,
-                     dma_addr_t dev_addr);
-
 int d40_log_sg_to_lli(struct scatterlist *sg,
                      int sg_len,
+                     dma_addr_t dev_addr,
                      struct d40_log_lli *lli_sg,
                      u32 lcsp13, /* src or dst*/
                      u32 data_width1, u32 data_width2);