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dma40: combine mem and slave sg-to-lli functions 

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>
This commit is contained in:
Rabin Vincent 2011-01-25 11:18:21 +01:00 committed by Dan Williams
parent 00ac034148
commit 3e3a0763e7
1 changed files with 84 additions and 110 deletions
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194
drivers/dma/ste_dma40.c
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@ -1618,6 +1618,81 @@ static u32 stedma40_residue(struct dma_chan *chan)
return bytes_left;
}
static int
d40_prep_sg_log(struct d40_chan *chan, struct d40_desc *desc,
struct scatterlist *sg_src, struct scatterlist *sg_dst,
unsigned int sg_len, enum dma_data_direction direction,
dma_addr_t dev_addr)
{
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;
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;
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;
}
return 0;
}
static int
d40_prep_sg_phy(struct d40_chan *chan, struct d40_desc *desc,
struct scatterlist *sg_src, struct scatterlist *sg_dst,
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;
ret = d40_phy_sg_to_lli(sg_src, sg_len, src_dev_addr,
desc->lli_phy.src,
virt_to_phys(desc->lli_phy.src),
chan->src_def_cfg,
src_info->data_width,
dst_info->data_width,
src_info->psize);
ret = d40_phy_sg_to_lli(sg_dst, sg_len, dst_dev_addr,
desc->lli_phy.dst,
virt_to_phys(desc->lli_phy.dst),
chan->dst_def_cfg,
dst_info->data_width,
src_info->data_width,
dst_info->psize);
dma_sync_single_for_device(chan->base->dev, desc->lli_pool.dma_addr,
desc->lli_pool.size, DMA_TO_DEVICE);
return ret < 0 ? ret : 0;
}
static struct d40_desc *
d40_prep_desc(struct d40_chan *chan, struct scatterlist *sg,
unsigned int sg_len, unsigned long dma_flags)
@ -1663,7 +1738,6 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
unsigned int sgl_len,
unsigned long dma_flags)
{
int res;
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
@ -1681,49 +1755,11 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
goto err;
if (chan_is_logical(d40c)) {
(void) d40_log_sg_to_lli(sgl_src,
sgl_len,
d40d->lli_log.src,
d40c->log_def.lcsp1,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.data_width);
(void) d40_log_sg_to_lli(sgl_dst,
sgl_len,
d40d->lli_log.dst,
d40c->log_def.lcsp3,
d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.data_width);
d40_prep_sg_log(d40c, d40d, sgl_src, sgl_dst,
sgl_len, DMA_NONE, 0);
} else {
res = d40_phy_sg_to_lli(sgl_src,
sgl_len,
0,
d40d->lli_phy.src,
virt_to_phys(d40d->lli_phy.src),
d40c->src_def_cfg,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.psize);
if (res < 0)
goto err;
res = d40_phy_sg_to_lli(sgl_dst,
sgl_len,
0,
d40d->lli_phy.dst,
virt_to_phys(d40d->lli_phy.dst),
d40c->dst_def_cfg,
d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.psize);
if (res < 0)
goto err;
dma_sync_single_for_device(d40c->base->dev,
d40d->lli_pool.dma_addr,
d40d->lli_pool.size, DMA_TO_DEVICE);
d40_prep_sg_phy(d40c, d40d, sgl_src, sgl_dst,
sgl_len, DMA_NONE, 0);
}
spin_unlock_irqrestore(&d40c->lock, flags);
@ -1904,69 +1940,6 @@ d40_prep_sg(struct dma_chan *chan,
return stedma40_memcpy_sg(chan, dst_sg, src_sg, dst_nents, dma_flags);
}
static int d40_prep_slave_sg_log(struct d40_desc *d40d,
struct d40_chan *d40c,
struct scatterlist *sgl,
unsigned int sg_len,
enum dma_data_direction direction,
dma_addr_t dev_addr)
{
int total_size;
total_size = d40_log_sg_to_dev(sgl, sg_len,
&d40d->lli_log,
&d40c->log_def,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.data_width,
direction,
dev_addr);
if (total_size < 0)
return -EINVAL;
return 0;
}
static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
struct d40_chan *d40c,
struct scatterlist *sgl,
unsigned int sgl_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;
int res;
res = d40_phy_sg_to_lli(sgl,
sgl_len,
src_dev_addr,
d40d->lli_phy.src,
virt_to_phys(d40d->lli_phy.src),
d40c->src_def_cfg,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.psize);
if (res < 0)
return res;
res = d40_phy_sg_to_lli(sgl,
sgl_len,
dst_dev_addr,
d40d->lli_phy.dst,
virt_to_phys(d40d->lli_phy.dst),
d40c->dst_def_cfg,
d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.psize);
if (res < 0)
return res;
dma_sync_single_for_device(d40c->base->dev, d40d->lli_pool.dma_addr,
d40d->lli_pool.size, DMA_TO_DEVICE);
return 0;
}
static dma_addr_t
d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
{
@ -2015,11 +1988,12 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
dev_addr = d40_get_dev_addr(d40c, direction);
if (chan_is_logical(d40c))
err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
direction, dev_addr);
err = d40_prep_sg_log(d40c, d40d, sgl, NULL,
sg_len, direction, dev_addr);
else
err = d40_prep_slave_sg_phy(d40d, d40c, sgl, sg_len,
direction, dev_addr);
err = d40_prep_sg_phy(d40c, d40d, sgl, NULL,
sg_len, direction, dev_addr);
if (err) {
chan_err(d40c, "Failed to prepare %s slave sg job: %d\n",
chan_is_logical(d40c) ? "log" : "phy", err);