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path: root/drivers/dma/ste_dma40.c
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Diffstat (limited to 'drivers/dma/ste_dma40.c')
-rw-r--r--drivers/dma/ste_dma40.c95
1 files changed, 40 insertions, 55 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 8ed154779bbf..1d176642e523 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -161,7 +161,8 @@ struct d40_base;
* @pending_tx: The number of pending transfers. Used between interrupt handler
* and tasklet.
* @busy: Set to true when transfer is ongoing on this channel.
- * @phy_chan: Pointer to physical channel which this instance runs on.
+ * @phy_chan: Pointer to physical channel which this instance runs on. If this
+ * point is NULL, then the channel is not allocated.
* @chan: DMA engine handle.
* @tasklet: Tasklet that gets scheduled from interrupt context to complete a
* transfer and call client callback.
@@ -1236,7 +1237,6 @@ static int d40_free_dma(struct d40_chan *d40c)
return -EINVAL;
}
-
res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
if (res) {
dev_err(&d40c->chan.dev->device, "[%s] suspend failed\n",
@@ -1305,8 +1305,6 @@ static int d40_free_dma(struct d40_chan *d40c)
d40c->base->lookup_phy_chans[phy->num] = NULL;
return 0;
-
-
}
static int d40_pause(struct dma_chan *chan)
@@ -1314,7 +1312,6 @@ static int d40_pause(struct dma_chan *chan)
struct d40_chan *d40c =
container_of(chan, struct d40_chan, chan);
int res;
-
unsigned long flags;
spin_lock_irqsave(&d40c->lock, flags);
@@ -1510,25 +1507,23 @@ 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 flags)
+ unsigned long dma_flags)
{
int res;
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
- unsigned long flg;
-
+ unsigned long flags;
- spin_lock_irqsave(&d40c->lock, flg);
+ spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_desc_get(d40c);
if (d40d == NULL)
goto err;
- memset(d40d, 0, sizeof(struct d40_desc));
d40d->lli_len = sgl_len;
d40d->lli_tx_len = d40d->lli_len;
- d40d->txd.flags = flags;
+ d40d->txd.flags = dma_flags;
if (d40c->log_num != D40_PHY_CHAN) {
if (d40d->lli_len > d40c->base->plat_data->llis_per_log)
@@ -1556,7 +1551,7 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->lli_log.src,
d40c->log_def.lcsp1,
d40c->dma_cfg.src_info.data_width,
- flags & DMA_PREP_INTERRUPT,
+ dma_flags & DMA_PREP_INTERRUPT,
d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
@@ -1566,7 +1561,7 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->lli_log.dst,
d40c->log_def.lcsp3,
d40c->dma_cfg.dst_info.data_width,
- flags & DMA_PREP_INTERRUPT,
+ dma_flags & DMA_PREP_INTERRUPT,
d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
@@ -1612,11 +1607,11 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->txd.tx_submit = d40_tx_submit;
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return &d40d->txd;
err:
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return NULL;
}
EXPORT_SYMBOL(stedma40_memcpy_sg);
@@ -1729,15 +1724,15 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
dma_addr_t dst,
dma_addr_t src,
size_t size,
- unsigned long flags)
+ unsigned long dma_flags)
{
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
- unsigned long flg;
+ unsigned long flags;
int err = 0;
- spin_lock_irqsave(&d40c->lock, flg);
+ spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_desc_get(d40c);
if (d40d == NULL) {
@@ -1746,9 +1741,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
goto err;
}
- memset(d40d, 0, sizeof(struct d40_desc));
-
- d40d->txd.flags = flags;
+ d40d->txd.flags = dma_flags;
dma_async_tx_descriptor_init(&d40d->txd, chan);
@@ -1817,7 +1810,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
d40d->lli_pool.size, DMA_TO_DEVICE);
}
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return &d40d->txd;
err_fill_lli:
@@ -1825,7 +1818,7 @@ err_fill_lli:
"[%s] Failed filling in PHY LLI\n", __func__);
d40_pool_lli_free(d40d);
err:
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return NULL;
}
@@ -1834,7 +1827,7 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
struct scatterlist *sgl,
unsigned int sg_len,
enum dma_data_direction direction,
- unsigned long flags)
+ unsigned long dma_flags)
{
dma_addr_t dev_addr = 0;
int total_size;
@@ -1860,32 +1853,24 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
if (d40_lcla_id_get(d40c, &d40c->base->lcla_pool) != 0)
d40d->lli_tx_len = 1;
- if (direction == DMA_FROM_DEVICE) {
+ if (direction == DMA_FROM_DEVICE)
dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
- total_size = d40_log_sg_to_dev(&d40c->lcla,
- sgl, sg_len,
- &d40d->lli_log,
- &d40c->log_def,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width,
- direction,
- flags & DMA_PREP_INTERRUPT,
- dev_addr, d40d->lli_tx_len,
- d40c->base->plat_data->llis_per_log);
- } else if (direction == DMA_TO_DEVICE) {
+ else if (direction == DMA_TO_DEVICE)
dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
- total_size = d40_log_sg_to_dev(&d40c->lcla,
- sgl, sg_len,
- &d40d->lli_log,
- &d40c->log_def,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width,
- direction,
- flags & DMA_PREP_INTERRUPT,
- dev_addr, d40d->lli_tx_len,
- d40c->base->plat_data->llis_per_log);
- } else
+ else
return -EINVAL;
+
+ total_size = d40_log_sg_to_dev(&d40c->lcla,
+ sgl, sg_len,
+ &d40d->lli_log,
+ &d40c->log_def,
+ d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width,
+ direction,
+ dma_flags & DMA_PREP_INTERRUPT,
+ dev_addr, d40d->lli_tx_len,
+ d40c->base->plat_data->llis_per_log);
+
if (total_size < 0)
return -EINVAL;
@@ -1897,7 +1882,7 @@ static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
struct scatterlist *sgl,
unsigned int sgl_len,
enum dma_data_direction direction,
- unsigned long flags)
+ unsigned long dma_flags)
{
dma_addr_t src_dev_addr;
dma_addr_t dst_dev_addr;
@@ -1954,12 +1939,12 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl,
unsigned int sg_len,
enum dma_data_direction direction,
- unsigned long flags)
+ unsigned long dma_flags)
{
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
- unsigned long flg;
+ unsigned long flags;
int err;
if (d40c->dma_cfg.pre_transfer)
@@ -1967,9 +1952,9 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
d40c->dma_cfg.pre_transfer_data,
sg_dma_len(sgl));
- spin_lock_irqsave(&d40c->lock, flg);
+ spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_desc_get(d40c);
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
if (d40d == NULL)
return NULL;
@@ -1978,10 +1963,10 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
if (d40c->log_num != D40_PHY_CHAN)
err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
- direction, flags);
+ direction, dma_flags);
else
err = d40_prep_slave_sg_phy(d40d, d40c, sgl, sg_len,
- direction, flags);
+ direction, dma_flags);
if (err) {
dev_err(&d40c->chan.dev->device,
"[%s] Failed to prepare %s slave sg job: %d\n",
@@ -1990,7 +1975,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
return NULL;
}
- d40d->txd.flags = flags;
+ d40d->txd.flags = dma_flags;
dma_async_tx_descriptor_init(&d40d->txd, chan);
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-24 21:59:45 +0000