dma40: implement prep_memcpy as a wrapper around memcpy_sg

To simplify the code.

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>

1 files changed, 9 insertions, 98 deletions

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index bd72269dac08..0a20179349b0 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1863,108 +1863,19 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
                                                        size_t size,
                                                        unsigned long dma_flags)
 {
-        struct d40_desc *d40d;
-        struct d40_chan *d40c = container_of(chan, struct d40_chan,
-                                             chan);
-        unsigned long flags;
-
-        if (d40c->phy_chan == NULL) {
-                chan_err(d40c, "Channel is not allocated.\n");
-                return ERR_PTR(-EINVAL);
-        }
-
-        spin_lock_irqsave(&d40c->lock, flags);
-        d40d = d40_desc_get(d40c);
-
-        if (d40d == NULL) {
-                chan_err(d40c, "Descriptor is NULL\n");
-                goto err;
-        }
-
-        d40d->txd.flags = dma_flags;
-        d40d->lli_len = d40_size_2_dmalen(size,
-                                          d40c->dma_cfg.src_info.data_width,
-                                          d40c->dma_cfg.dst_info.data_width);
-        if (d40d->lli_len < 0) {
-                chan_err(d40c, "Unaligned size\n");
-                goto err;
-        }
-
-
-        dma_async_tx_descriptor_init(&d40d->txd, chan);
-
-        d40d->txd.tx_submit = d40_tx_submit;
-
-        if (chan_is_logical(d40c)) {
-
-                if (d40_pool_lli_alloc(d40c,d40d, d40d->lli_len, true) < 0) {
-                        chan_err(d40c, "Out of memory\n");
-                        goto err;
-                }
-                d40d->lli_current = 0;
-
-                if (d40_log_buf_to_lli(d40d->lli_log.src,
-                                       src,
-                                       size,
-                                       d40c->log_def.lcsp1,
-                                       d40c->dma_cfg.src_info.data_width,
-                                       d40c->dma_cfg.dst_info.data_width,
-                                       true) == NULL)
-                        goto err;
-
-                if (d40_log_buf_to_lli(d40d->lli_log.dst,
-                                       dst,
-                                       size,
-                                       d40c->log_def.lcsp3,
-                                       d40c->dma_cfg.dst_info.data_width,
-                                       d40c->dma_cfg.src_info.data_width,
-                                       true) == NULL)
-                        goto err;
-
-        } else {
-
-                if (d40_pool_lli_alloc(d40c, d40d, d40d->lli_len, false) < 0) {
-                        chan_err(d40c, "Out of memory\n");
-                        goto err;
-                }
-
-                if (d40_phy_buf_to_lli(d40d->lli_phy.src,
-                                       src,
-                                       size,
-                                       d40c->dma_cfg.src_info.psize,
-                                       0,
-                                       d40c->src_def_cfg,
-                                       true,
-                                       d40c->dma_cfg.src_info.data_width,
-                                       d40c->dma_cfg.dst_info.data_width,
-                                       false) == NULL)
-                        goto err;
+        struct scatterlist dst_sg;
+        struct scatterlist src_sg;
 
-                if (d40_phy_buf_to_lli(d40d->lli_phy.dst,
-                                       dst,
-                                       size,
-                                       d40c->dma_cfg.dst_info.psize,
-                                       0,
-                                       d40c->dst_def_cfg,
-                                       true,
-                                       d40c->dma_cfg.dst_info.data_width,
-                                       d40c->dma_cfg.src_info.data_width,
-                                       false) == NULL)
-                        goto err;
+        sg_init_table(&dst_sg, 1);
+        sg_init_table(&src_sg, 1);
 
-                dma_sync_single_for_device(d40c->base->dev,
-                                           d40d->lli_pool.dma_addr,
-                                           d40d->lli_pool.size, DMA_TO_DEVICE);
-        }
+        sg_dma_address(&dst_sg) = dst;
+        sg_dma_address(&src_sg) = src;
 
-        spin_unlock_irqrestore(&d40c->lock, flags);
-        return &d40d->txd;
+        sg_dma_len(&dst_sg) = size;
+        sg_dma_len(&src_sg) = size;
 
-err:
-        if (d40d)
-                d40_desc_free(d40c, d40d);
-        spin_unlock_irqrestore(&d40c->lock, flags);
-        return NULL;
+        return stedma40_memcpy_sg(chan, &dst_sg, &src_sg, 1, dma_flags);
 }
 
 static struct dma_async_tx_descriptor *