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dma40: combine mem and slave prep_sg functions

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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 11:18:23 +01:00 committed by Dan Williams
parent 10a946b3a4
commit cade1d30b2
1 changed files with 63 additions and 95 deletions
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158
drivers/dma/ste_dma40.c
View file

@ -1732,44 +1732,70 @@ d40_prep_desc(struct d40_chan *chan, struct scatterlist *sg,
return NULL;
}
struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
static struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
struct scatterlist *sgl_dst,
struct scatterlist *sgl_src,
unsigned int sgl_len,
unsigned long dma_flags)
static dma_addr_t
d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
{
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
unsigned long flags;
struct stedma40_platform_data *plat = chan->base->plat_data;
struct stedma40_chan_cfg *cfg = &chan->dma_cfg;
dma_addr_t addr;
if (d40c->phy_chan == NULL) {
chan_err(d40c, "Unallocated channel.\n");
return ERR_PTR(-EINVAL);
if (chan->runtime_addr)
return chan->runtime_addr;
if (direction == DMA_FROM_DEVICE)
addr = plat->dev_rx[cfg->src_dev_type];
else if (direction == DMA_TO_DEVICE)
addr = plat->dev_tx[cfg->dst_dev_type];
return addr;
}
static struct dma_async_tx_descriptor *
d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src,
struct scatterlist *sg_dst, unsigned int sg_len,
enum dma_data_direction direction, unsigned long dma_flags)
{
struct d40_chan *chan = container_of(dchan, struct d40_chan, chan);
dma_addr_t dev_addr = 0;
struct d40_desc *desc;
unsigned long flags;
int ret;
if (!chan->phy_chan) {
chan_err(chan, "Cannot prepare unallocated channel\n");
return NULL;
}
spin_lock_irqsave(&d40c->lock, flags);
spin_lock_irqsave(&chan->lock, flags);
d40d = d40_prep_desc(d40c, sgl_dst, sgl_len, dma_flags);
if (!d40d)
desc = d40_prep_desc(chan, sg_src, sg_len, dma_flags);
if (desc == NULL)
goto err;
if (chan_is_logical(d40c)) {
d40_prep_sg_log(d40c, d40d, sgl_src, sgl_dst,
sgl_len, DMA_NONE, 0);
} else {
d40_prep_sg_phy(d40c, d40d, sgl_src, sgl_dst,
sgl_len, DMA_NONE, 0);
if (direction != DMA_NONE)
dev_addr = d40_get_dev_addr(chan, direction);
if (chan_is_logical(chan))
ret = d40_prep_sg_log(chan, desc, sg_src, sg_dst,
sg_len, direction, dev_addr);
else
ret = d40_prep_sg_phy(chan, desc, sg_src, sg_dst,
sg_len, direction, dev_addr);
if (ret) {
chan_err(chan, "Failed to prepare %s sg job: %d\n",
chan_is_logical(chan) ? "log" : "phy", ret);
goto err;
}
spin_unlock_irqrestore(&d40c->lock, flags);
spin_unlock_irqrestore(&chan->lock, flags);
return &desc->txd;
return &d40d->txd;
err:
if (d40d)
d40_desc_free(d40c, d40d);
spin_unlock_irqrestore(&d40c->lock, flags);
if (desc)
d40_desc_free(chan, desc);
spin_unlock_irqrestore(&chan->lock, flags);
return NULL;
}
@ -1925,37 +1951,19 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
sg_dma_len(&dst_sg) = size;
sg_dma_len(&src_sg) = size;
return stedma40_memcpy_sg(chan, &dst_sg, &src_sg, 1, dma_flags);
return d40_prep_sg(chan, &src_sg, &dst_sg, 1, DMA_NONE, dma_flags);
}
static struct dma_async_tx_descriptor *
d40_prep_sg(struct dma_chan *chan,
struct scatterlist *dst_sg, unsigned int dst_nents,
struct scatterlist *src_sg, unsigned int src_nents,
unsigned long dma_flags)
d40_prep_memcpy_sg(struct dma_chan *chan,
struct scatterlist *dst_sg, unsigned int dst_nents,
struct scatterlist *src_sg, unsigned int src_nents,
unsigned long dma_flags)
{
if (dst_nents != src_nents)
return NULL;
return stedma40_memcpy_sg(chan, dst_sg, src_sg, dst_nents, dma_flags);
}
static dma_addr_t
d40_get_dev_addr(struct d40_chan *chan, enum dma_data_direction direction)
{
struct stedma40_platform_data *plat = chan->base->plat_data;
struct stedma40_chan_cfg *cfg = &chan->dma_cfg;
dma_addr_t addr;
if (chan->runtime_addr)
return chan->runtime_addr;
if (direction == DMA_FROM_DEVICE)
addr = plat->dev_rx[cfg->src_dev_type];
else if (direction == DMA_TO_DEVICE)
addr = plat->dev_tx[cfg->dst_dev_type];
return addr;
return d40_prep_sg(chan, src_sg, dst_sg, src_nents, DMA_NONE, dma_flags);
}
static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
@ -1964,50 +1972,10 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
enum dma_data_direction direction,
unsigned long dma_flags)
{
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
dma_addr_t dev_addr;
unsigned long flags;
int err;
if (d40c->phy_chan == NULL) {
chan_err(d40c, "Cannot prepare unallocated channel\n");
return ERR_PTR(-EINVAL);
}
if (direction != DMA_FROM_DEVICE && direction != DMA_TO_DEVICE)
return NULL;
spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_prep_desc(d40c, sgl, sg_len, dma_flags);
if (d40d == NULL)
goto err;
dev_addr = d40_get_dev_addr(d40c, direction);
if (chan_is_logical(d40c))
err = d40_prep_sg_log(d40c, d40d, sgl, NULL,
sg_len, direction, dev_addr);
else
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);
goto err;
}
spin_unlock_irqrestore(&d40c->lock, flags);
return &d40d->txd;
err:
if (d40d)
d40_desc_free(d40c, d40d);
spin_unlock_irqrestore(&d40c->lock, flags);
return NULL;
return d40_prep_sg(chan, sgl, sgl, sg_len, direction, dma_flags);
}
static enum dma_status d40_tx_status(struct dma_chan *chan,
@ -2267,7 +2235,7 @@ static int __init d40_dmaengine_init(struct d40_base *base,
base->dma_slave.device_alloc_chan_resources = d40_alloc_chan_resources;
base->dma_slave.device_free_chan_resources = d40_free_chan_resources;
base->dma_slave.device_prep_dma_memcpy = d40_prep_memcpy;
base->dma_slave.device_prep_dma_sg = d40_prep_sg;
base->dma_slave.device_prep_dma_sg = d40_prep_memcpy_sg;
base->dma_slave.device_prep_slave_sg = d40_prep_slave_sg;
base->dma_slave.device_tx_status = d40_tx_status;
base->dma_slave.device_issue_pending = d40_issue_pending;
@ -2291,7 +2259,7 @@ static int __init d40_dmaengine_init(struct d40_base *base,
base->dma_memcpy.device_alloc_chan_resources = d40_alloc_chan_resources;
base->dma_memcpy.device_free_chan_resources = d40_free_chan_resources;
base->dma_memcpy.device_prep_dma_memcpy = d40_prep_memcpy;
base->dma_slave.device_prep_dma_sg = d40_prep_sg;
base->dma_slave.device_prep_dma_sg = d40_prep_memcpy_sg;
base->dma_memcpy.device_prep_slave_sg = d40_prep_slave_sg;
base->dma_memcpy.device_tx_status = d40_tx_status;
base->dma_memcpy.device_issue_pending = d40_issue_pending;
@ -2322,7 +2290,7 @@ static int __init d40_dmaengine_init(struct d40_base *base,
base->dma_both.device_alloc_chan_resources = d40_alloc_chan_resources;
base->dma_both.device_free_chan_resources = d40_free_chan_resources;
base->dma_both.device_prep_dma_memcpy = d40_prep_memcpy;
base->dma_slave.device_prep_dma_sg = d40_prep_sg;
base->dma_slave.device_prep_dma_sg = d40_prep_memcpy_sg;
base->dma_both.device_prep_slave_sg = d40_prep_slave_sg;
base->dma_both.device_tx_status = d40_tx_status;
base->dma_both.device_issue_pending = d40_issue_pending;